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Rewrote the console app using some basic curses and crappy home-grown C++ wrappers.

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This commit is contained in:
casey 2016-05-07 02:47:35 -07:00
parent 14096724a2
commit 9126c6ca6a
223 changed files with 1460 additions and 77901 deletions
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65
src/3rdparty/3rdparty.vcxproj vendored
View File

@ -87,77 +87,12 @@
<ClCompile Include="src\sqlite\sqlite3.c">
<WarningLevel Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Level1</WarningLevel>
</ClCompile>
<ClCompile Include="src\expat\xmlparse.c" />
<ClCompile Include="src\expat\xmlrole.c" />
<ClCompile Include="src\expat\xmltok.c" />
<ClCompile Include="src\expat\xmltok_impl.c" />
<ClCompile Include="src\expat\xmltok_ns.c" />
<ClCompile Include="src\md5\md5.c" />
<ClCompile Include="src\jpeg-6b\jcapimin.c" />
<ClCompile Include="src\jpeg-6b\jcapistd.c" />
<ClCompile Include="src\jpeg-6b\jccoefct.c" />
<ClCompile Include="src\jpeg-6b\jccolor.c" />
<ClCompile Include="src\jpeg-6b\jcdctmgr.c" />
<ClCompile Include="src\jpeg-6b\jchuff.c" />
<ClCompile Include="src\jpeg-6b\jcinit.c" />
<ClCompile Include="src\jpeg-6b\jcmainct.c" />
<ClCompile Include="src\jpeg-6b\jcmarker.c" />
<ClCompile Include="src\jpeg-6b\jcmaster.c" />
<ClCompile Include="src\jpeg-6b\jcomapi.c" />
<ClCompile Include="src\jpeg-6b\jcparam.c" />
<ClCompile Include="src\jpeg-6b\jcphuff.c" />
<ClCompile Include="src\jpeg-6b\jcprepct.c" />
<ClCompile Include="src\jpeg-6b\jcsample.c" />
<ClCompile Include="src\jpeg-6b\jctrans.c" />
<ClCompile Include="src\jpeg-6b\jdapimin.c" />
<ClCompile Include="src\jpeg-6b\jdapistd.c" />
<ClCompile Include="src\jpeg-6b\jdatadst.c" />
<ClCompile Include="src\jpeg-6b\jdatasrc.c" />
<ClCompile Include="src\jpeg-6b\jdcoefct.c" />
<ClCompile Include="src\jpeg-6b\jdcolor.c" />
<ClCompile Include="src\jpeg-6b\jddctmgr.c" />
<ClCompile Include="src\jpeg-6b\jdhuff.c" />
<ClCompile Include="src\jpeg-6b\jdinput.c" />
<ClCompile Include="src\jpeg-6b\jdmainct.c" />
<ClCompile Include="src\jpeg-6b\jdmarker.c" />
<ClCompile Include="src\jpeg-6b\jdmaster.c" />
<ClCompile Include="src\jpeg-6b\jdmerge.c" />
<ClCompile Include="src\jpeg-6b\jdphuff.c" />
<ClCompile Include="src\jpeg-6b\jdpostct.c" />
<ClCompile Include="src\jpeg-6b\jdsample.c" />
<ClCompile Include="src\jpeg-6b\jdtrans.c" />
<ClCompile Include="src\jpeg-6b\jerror.c" />
<ClCompile Include="src\jpeg-6b\jfdctflt.c" />
<ClCompile Include="src\jpeg-6b\jfdctfst.c" />
<ClCompile Include="src\jpeg-6b\jfdctint.c" />
<ClCompile Include="src\jpeg-6b\jidctflt.c" />
<ClCompile Include="src\jpeg-6b\jidctfst.c" />
<ClCompile Include="src\jpeg-6b\jidctint.c" />
<ClCompile Include="src\jpeg-6b\jidctred.c" />
<ClCompile Include="src\jpeg-6b\jmemmgr.c" />
<ClCompile Include="src\jpeg-6b\jmemnobs.c" />
<ClCompile Include="src\jpeg-6b\jpegtran.c" />
<ClCompile Include="src\jpeg-6b\jquant1.c" />
<ClCompile Include="src\jpeg-6b\jquant2.c" />
<ClCompile Include="src\jpeg-6b\jutils.c" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="include\sqlite\sqlite3.h" />
<ClInclude Include="include\sqlite\sqlite3ext.h" />
<ClInclude Include="include\sigslot\sigslot.h" />
<ClInclude Include="include\expat\ascii.h" />
<ClInclude Include="include\expat\asciitab.h" />
<ClInclude Include="include\expat\expat.h" />
<ClInclude Include="include\expat\expat_external.h" />
<ClInclude Include="include\expat\iasciitab.h" />
<ClInclude Include="include\expat\internal.h" />
<ClInclude Include="include\expat\latin1tab.h" />
<ClInclude Include="include\expat\nametab.h" />
<ClInclude Include="include\expat\utf8tab.h" />
<ClInclude Include="include\expat\winconfig.h" />
<ClInclude Include="include\expat\xmlrole.h" />
<ClInclude Include="include\expat\xmltok.h" />
<ClInclude Include="include\expat\xmltok_impl.h" />
<ClInclude Include="include\md5\md5.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />

201
src/3rdparty/3rdparty.vcxproj.filters vendored
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@ -11,179 +11,17 @@
<Filter Include="src\sigslot">
<UniqueIdentifier>{57af24a7-d581-4aac-94af-fb79332228ab}</UniqueIdentifier>
</Filter>
<Filter Include="src\expat">
<UniqueIdentifier>{0f07e711-650f-4aea-8eb5-d024980a664b}</UniqueIdentifier>
</Filter>
<Filter Include="src\md5">
<UniqueIdentifier>{d5daddec-d920-4412-a600-3e0998d7dfe9}</UniqueIdentifier>
</Filter>
<Filter Include="src\jpeg-6b">
<UniqueIdentifier>{4b07d4a6-c94d-4b33-b664-dc80f14ca558}</UniqueIdentifier>
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="src\sqlite\sqlite3.c">
<Filter>src\sqlite</Filter>
</ClCompile>
<ClCompile Include="src\expat\xmlparse.c">
<Filter>src\expat</Filter>
</ClCompile>
<ClCompile Include="src\expat\xmlrole.c">
<Filter>src\expat</Filter>
</ClCompile>
<ClCompile Include="src\expat\xmltok.c">
<Filter>src\expat</Filter>
</ClCompile>
<ClCompile Include="src\expat\xmltok_impl.c">
<Filter>src\expat</Filter>
</ClCompile>
<ClCompile Include="src\expat\xmltok_ns.c">
<Filter>src\expat</Filter>
</ClCompile>
<ClCompile Include="src\md5\md5.c">
<Filter>src\md5</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcapimin.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcapistd.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jccoefct.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jccolor.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcdctmgr.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jchuff.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcinit.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcmainct.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcmarker.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcmaster.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcomapi.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcparam.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcphuff.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcprepct.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jcsample.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jctrans.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdapimin.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdapistd.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdatadst.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdatasrc.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdcoefct.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdcolor.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jddctmgr.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdhuff.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdinput.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdmainct.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdmarker.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdmaster.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdmerge.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdphuff.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdpostct.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdsample.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jdtrans.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jerror.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jfdctflt.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jfdctfst.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jfdctint.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jidctflt.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jidctfst.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jidctint.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jidctred.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jmemmgr.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jmemnobs.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jpegtran.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jquant1.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jquant2.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
<ClCompile Include="src\jpeg-6b\jutils.c">
<Filter>src\jpeg-6b</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="include\sqlite\sqlite3.h">
@ -195,45 +33,6 @@
<ClInclude Include="include\sigslot\sigslot.h">
<Filter>src\sigslot</Filter>
</ClInclude>
<ClInclude Include="include\expat\ascii.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\asciitab.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\expat.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\expat_external.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\iasciitab.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\internal.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\latin1tab.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\nametab.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\utf8tab.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\winconfig.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\xmlrole.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\xmltok.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\expat\xmltok_impl.h">
<Filter>src\expat</Filter>
</ClInclude>
<ClInclude Include="include\md5\md5.h">
<Filter>src\md5</Filter>
</ClInclude>

814
src/3rdparty/include/curses.h vendored
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File diff suppressed because it is too large Load Diff

8
src/3rdparty/include/curspriv.h vendored
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@ -1,17 +1,11 @@
/* Public Domain Curses */
/* $Id: curspriv.h,v 1.158 2008/07/13 16:08:16 wmcbrine Exp $ */
/* Private definitions and declarations for use within PDCurses.
These should generally not be referenced by applications. */
#ifndef __CURSES_INTERNALS__
#define __CURSES_INTERNALS__ 1
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#define CURSES_LIBRARY
#include <curses.h>
@ -113,10 +107,8 @@ size_t PDC_wcstombs(char *, const wchar_t *, size_t);
#ifdef PDCDEBUG
# define PDC_LOG(x) if (pdc_trace_on) PDC_debug x
# define RCSID(x) static const char *rcsid = x;
#else
# define PDC_LOG(x)
# define RCSID(x)
#endif
/* Internal macros for attributes */

32
src/3rdparty/include/expat/amigaconfig.h vendored
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@ -1,32 +0,0 @@
#ifndef AMIGACONFIG_H
#define AMIGACONFIG_H
/* 1234 = LIL_ENDIAN, 4321 = BIGENDIAN */
#define BYTEORDER 4321
/* Define to 1 if you have the `bcopy' function. */
#define HAVE_BCOPY 1
/* Define to 1 if you have the <check.h> header file. */
#undef HAVE_CHECK_H
/* Define to 1 if you have the `memmove' function. */
#define HAVE_MEMMOVE 1
/* Define to 1 if you have the <unistd.h> header file. */
#define HAVE_UNISTD_H 1
/* whether byteorder is bigendian */
#define WORDS_BIGENDIAN
/* Define to specify how much context to retain around the current parse
point. */
#define XML_CONTEXT_BYTES 1024
/* Define to make parameter entity parsing functionality available. */
#define XML_DTD
/* Define to make XML Namespaces functionality available. */
#define XML_NS
#endif /* AMIGACONFIG_H */

92
src/3rdparty/include/expat/ascii.h vendored
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@ -1,92 +0,0 @@
/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
#define ASCII_A 0x41
#define ASCII_B 0x42
#define ASCII_C 0x43
#define ASCII_D 0x44
#define ASCII_E 0x45
#define ASCII_F 0x46
#define ASCII_G 0x47
#define ASCII_H 0x48
#define ASCII_I 0x49
#define ASCII_J 0x4A
#define ASCII_K 0x4B
#define ASCII_L 0x4C
#define ASCII_M 0x4D
#define ASCII_N 0x4E
#define ASCII_O 0x4F
#define ASCII_P 0x50
#define ASCII_Q 0x51
#define ASCII_R 0x52
#define ASCII_S 0x53
#define ASCII_T 0x54
#define ASCII_U 0x55
#define ASCII_V 0x56
#define ASCII_W 0x57
#define ASCII_X 0x58
#define ASCII_Y 0x59
#define ASCII_Z 0x5A
#define ASCII_a 0x61
#define ASCII_b 0x62
#define ASCII_c 0x63
#define ASCII_d 0x64
#define ASCII_e 0x65
#define ASCII_f 0x66
#define ASCII_g 0x67
#define ASCII_h 0x68
#define ASCII_i 0x69
#define ASCII_j 0x6A
#define ASCII_k 0x6B
#define ASCII_l 0x6C
#define ASCII_m 0x6D
#define ASCII_n 0x6E
#define ASCII_o 0x6F
#define ASCII_p 0x70
#define ASCII_q 0x71
#define ASCII_r 0x72
#define ASCII_s 0x73
#define ASCII_t 0x74
#define ASCII_u 0x75
#define ASCII_v 0x76
#define ASCII_w 0x77
#define ASCII_x 0x78
#define ASCII_y 0x79
#define ASCII_z 0x7A
#define ASCII_0 0x30
#define ASCII_1 0x31
#define ASCII_2 0x32
#define ASCII_3 0x33
#define ASCII_4 0x34
#define ASCII_5 0x35
#define ASCII_6 0x36
#define ASCII_7 0x37
#define ASCII_8 0x38
#define ASCII_9 0x39
#define ASCII_TAB 0x09
#define ASCII_SPACE 0x20
#define ASCII_EXCL 0x21
#define ASCII_QUOT 0x22
#define ASCII_AMP 0x26
#define ASCII_APOS 0x27
#define ASCII_MINUS 0x2D
#define ASCII_PERIOD 0x2E
#define ASCII_COLON 0x3A
#define ASCII_SEMI 0x3B
#define ASCII_LT 0x3C
#define ASCII_EQUALS 0x3D
#define ASCII_GT 0x3E
#define ASCII_LSQB 0x5B
#define ASCII_RSQB 0x5D
#define ASCII_UNDERSCORE 0x5F
#define ASCII_LPAREN 0x28
#define ASCII_RPAREN 0x29
#define ASCII_FF 0x0C
#define ASCII_SLASH 0x2F
#define ASCII_HASH 0x23
#define ASCII_PIPE 0x7C
#define ASCII_COMMA 0x2C

36
src/3rdparty/include/expat/asciitab.h vendored
View File

@ -1,36 +0,0 @@
/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
/* 0x00 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x04 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x08 */ BT_NONXML, BT_S, BT_LF, BT_NONXML,
/* 0x0C */ BT_NONXML, BT_CR, BT_NONXML, BT_NONXML,
/* 0x10 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x14 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x18 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x1C */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x20 */ BT_S, BT_EXCL, BT_QUOT, BT_NUM,
/* 0x24 */ BT_OTHER, BT_PERCNT, BT_AMP, BT_APOS,
/* 0x28 */ BT_LPAR, BT_RPAR, BT_AST, BT_PLUS,
/* 0x2C */ BT_COMMA, BT_MINUS, BT_NAME, BT_SOL,
/* 0x30 */ BT_DIGIT, BT_DIGIT, BT_DIGIT, BT_DIGIT,
/* 0x34 */ BT_DIGIT, BT_DIGIT, BT_DIGIT, BT_DIGIT,
/* 0x38 */ BT_DIGIT, BT_DIGIT, BT_COLON, BT_SEMI,
/* 0x3C */ BT_LT, BT_EQUALS, BT_GT, BT_QUEST,
/* 0x40 */ BT_OTHER, BT_HEX, BT_HEX, BT_HEX,
/* 0x44 */ BT_HEX, BT_HEX, BT_HEX, BT_NMSTRT,
/* 0x48 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x4C */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x50 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x54 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x58 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_LSQB,
/* 0x5C */ BT_OTHER, BT_RSQB, BT_OTHER, BT_NMSTRT,
/* 0x60 */ BT_OTHER, BT_HEX, BT_HEX, BT_HEX,
/* 0x64 */ BT_HEX, BT_HEX, BT_HEX, BT_NMSTRT,
/* 0x68 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x6C */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x70 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x74 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x78 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_OTHER,
/* 0x7C */ BT_VERBAR, BT_OTHER, BT_OTHER, BT_OTHER,

1014
src/3rdparty/include/expat/expat.h vendored
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115
src/3rdparty/include/expat/expat_external.h vendored
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@ -1,115 +0,0 @@
/* Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
#ifndef Expat_External_INCLUDED
#define Expat_External_INCLUDED 1
/* External API definitions */
#if defined(_MSC_EXTENSIONS) && !defined(__BEOS__) && !defined(__CYGWIN__)
#define XML_USE_MSC_EXTENSIONS 1
#endif
/* Expat tries very hard to make the API boundary very specifically
defined. There are two macros defined to control this boundary;
each of these can be defined before including this header to
achieve some different behavior, but doing so it not recommended or
tested frequently.
XMLCALL - The calling convention to use for all calls across the
"library boundary." This will default to cdecl, and
try really hard to tell the compiler that's what we
want.
XMLIMPORT - Whatever magic is needed to note that a function is
to be imported from a dynamically loaded library
(.dll, .so, or .sl, depending on your platform).
The XMLCALL macro was added in Expat 1.95.7. The only one which is
expected to be directly useful in client code is XMLCALL.
Note that on at least some Unix versions, the Expat library must be
compiled with the cdecl calling convention as the default since
system headers may assume the cdecl convention.
*/
#ifndef XMLCALL
#if defined(_MSC_VER)
#define XMLCALL __cdecl
#elif defined(__GNUC__) && defined(__i386) && !defined(__INTEL_COMPILER)
#define XMLCALL __attribute__((cdecl))
#else
/* For any platform which uses this definition and supports more than
one calling convention, we need to extend this definition to
declare the convention used on that platform, if it's possible to
do so.
If this is the case for your platform, please file a bug report
with information on how to identify your platform via the C
pre-processor and how to specify the same calling convention as the
platform's malloc() implementation.
*/
#define XMLCALL
#endif
#endif /* not defined XMLCALL */
#if !defined(XML_STATIC) && !defined(XMLIMPORT)
#ifndef XML_BUILDING_EXPAT
/* using Expat from an application */
#ifdef XML_USE_MSC_EXTENSIONS
#define XMLIMPORT __declspec(dllimport)
#endif
#endif
#endif /* not defined XML_STATIC */
/* If we didn't define it above, define it away: */
#ifndef XMLIMPORT
#define XMLIMPORT
#endif
#define XMLPARSEAPI(type) XMLIMPORT type XMLCALL
#ifdef __cplusplus
extern "C" {
#endif
#ifdef XML_UNICODE_WCHAR_T
#define XML_UNICODE
#endif
#ifdef XML_UNICODE /* Information is UTF-16 encoded. */
#ifdef XML_UNICODE_WCHAR_T
typedef wchar_t XML_Char;
typedef wchar_t XML_LChar;
#else
typedef unsigned short XML_Char;
typedef char XML_LChar;
#endif /* XML_UNICODE_WCHAR_T */
#else /* Information is UTF-8 encoded. */
typedef char XML_Char;
typedef char XML_LChar;
#endif /* XML_UNICODE */
#ifdef XML_LARGE_SIZE /* Use large integers for file/stream positions. */
#if defined(XML_USE_MSC_EXTENSIONS) && _MSC_VER < 1400
typedef __int64 XML_Index;
typedef unsigned __int64 XML_Size;
#else
typedef long long XML_Index;
typedef unsigned long long XML_Size;
#endif
#else
typedef long XML_Index;
typedef unsigned long XML_Size;
#endif /* XML_LARGE_SIZE */
#ifdef __cplusplus
}
#endif
#endif /* not Expat_External_INCLUDED */

37
src/3rdparty/include/expat/iasciitab.h vendored
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@ -1,37 +0,0 @@
/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
/* Like asciitab.h, except that 0xD has code BT_S rather than BT_CR */
/* 0x00 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x04 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x08 */ BT_NONXML, BT_S, BT_LF, BT_NONXML,
/* 0x0C */ BT_NONXML, BT_S, BT_NONXML, BT_NONXML,
/* 0x10 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x14 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x18 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x1C */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0x20 */ BT_S, BT_EXCL, BT_QUOT, BT_NUM,
/* 0x24 */ BT_OTHER, BT_PERCNT, BT_AMP, BT_APOS,
/* 0x28 */ BT_LPAR, BT_RPAR, BT_AST, BT_PLUS,
/* 0x2C */ BT_COMMA, BT_MINUS, BT_NAME, BT_SOL,
/* 0x30 */ BT_DIGIT, BT_DIGIT, BT_DIGIT, BT_DIGIT,
/* 0x34 */ BT_DIGIT, BT_DIGIT, BT_DIGIT, BT_DIGIT,
/* 0x38 */ BT_DIGIT, BT_DIGIT, BT_COLON, BT_SEMI,
/* 0x3C */ BT_LT, BT_EQUALS, BT_GT, BT_QUEST,
/* 0x40 */ BT_OTHER, BT_HEX, BT_HEX, BT_HEX,
/* 0x44 */ BT_HEX, BT_HEX, BT_HEX, BT_NMSTRT,
/* 0x48 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x4C */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x50 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x54 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x58 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_LSQB,
/* 0x5C */ BT_OTHER, BT_RSQB, BT_OTHER, BT_NMSTRT,
/* 0x60 */ BT_OTHER, BT_HEX, BT_HEX, BT_HEX,
/* 0x64 */ BT_HEX, BT_HEX, BT_HEX, BT_NMSTRT,
/* 0x68 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x6C */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x70 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x74 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0x78 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_OTHER,
/* 0x7C */ BT_VERBAR, BT_OTHER, BT_OTHER, BT_OTHER,

73
src/3rdparty/include/expat/internal.h vendored
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@ -1,73 +0,0 @@
/* internal.h
Internal definitions used by Expat. This is not needed to compile
client code.
The following calling convention macros are defined for frequently
called functions:
FASTCALL - Used for those internal functions that have a simple
body and a low number of arguments and local variables.
PTRCALL - Used for functions called though function pointers.
PTRFASTCALL - Like PTRCALL, but for low number of arguments.
inline - Used for selected internal functions for which inlining
may improve performance on some platforms.
Note: Use of these macros is based on judgement, not hard rules,
and therefore subject to change.
*/
#if defined(__GNUC__) && defined(__i386__) && !defined(__MINGW32__)
/* We'll use this version by default only where we know it helps.
regparm() generates warnings on Solaris boxes. See SF bug #692878.
Instability reported with egcs on a RedHat Linux 7.3.
Let's comment out:
#define FASTCALL __attribute__((stdcall, regparm(3)))
and let's try this:
*/
#define FASTCALL __attribute__((regparm(3)))
#define PTRFASTCALL __attribute__((regparm(3)))
#endif
/* Using __fastcall seems to have an unexpected negative effect under
MS VC++, especially for function pointers, so we won't use it for
now on that platform. It may be reconsidered for a future release
if it can be made more effective.
Likely reason: __fastcall on Windows is like stdcall, therefore
the compiler cannot perform stack optimizations for call clusters.
*/
/* Make sure all of these are defined if they aren't already. */
#ifndef FASTCALL
#define FASTCALL
#endif
#ifndef PTRCALL
#define PTRCALL
#endif
#ifndef PTRFASTCALL
#define PTRFASTCALL
#endif
#ifndef XML_MIN_SIZE
#if !defined(__cplusplus) && !defined(inline)
#ifdef __GNUC__
#define inline __inline
#endif /* __GNUC__ */
#endif
#endif /* XML_MIN_SIZE */
#ifdef __cplusplus
#define inline inline
#else
#ifndef inline
#define inline
#endif
#endif

36
src/3rdparty/include/expat/latin1tab.h vendored
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@ -1,36 +0,0 @@
/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
/* 0x80 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0x84 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0x88 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0x8C */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0x90 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0x94 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0x98 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0x9C */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0xA0 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0xA4 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0xA8 */ BT_OTHER, BT_OTHER, BT_NMSTRT, BT_OTHER,
/* 0xAC */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0xB0 */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0xB4 */ BT_OTHER, BT_NMSTRT, BT_OTHER, BT_NAME,
/* 0xB8 */ BT_OTHER, BT_OTHER, BT_NMSTRT, BT_OTHER,
/* 0xBC */ BT_OTHER, BT_OTHER, BT_OTHER, BT_OTHER,
/* 0xC0 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xC4 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xC8 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xCC */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xD0 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xD4 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_OTHER,
/* 0xD8 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xDC */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xE0 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xE4 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xE8 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xEC */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xF0 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xF4 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_OTHER,
/* 0xF8 */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,
/* 0xFC */ BT_NMSTRT, BT_NMSTRT, BT_NMSTRT, BT_NMSTRT,

53
src/3rdparty/include/expat/macconfig.h vendored
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@ -1,53 +0,0 @@
/*================================================================
** Copyright 2000, Clark Cooper
** All rights reserved.
**
** This is free software. You are permitted to copy, distribute, or modify
** it under the terms of the MIT/X license (contained in the COPYING file
** with this distribution.)
**
*/
#ifndef MACCONFIG_H
#define MACCONFIG_H
/* 1234 = LIL_ENDIAN, 4321 = BIGENDIAN */
#define BYTEORDER 4321
/* Define to 1 if you have the `bcopy' function. */
#undef HAVE_BCOPY
/* Define to 1 if you have the `memmove' function. */
#define HAVE_MEMMOVE
/* Define to 1 if you have a working `mmap' system call. */
#undef HAVE_MMAP
/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H
/* whether byteorder is bigendian */
#define WORDS_BIGENDIAN
/* Define to specify how much context to retain around the current parse
point. */
#undef XML_CONTEXT_BYTES
/* Define to make parameter entity parsing functionality available. */
#define XML_DTD
/* Define to make XML Namespaces functionality available. */
#define XML_NS
/* Define to empty if `const' does not conform to ANSI C. */
#undef const
/* Define to `long' if <sys/types.h> does not define. */
#define off_t long
/* Define to `unsigned' if <sys/types.h> does not define. */
#undef size_t
#endif /* ifndef MACCONFIG_H */

150
src/3rdparty/include/expat/nametab.h vendored
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@ -1,150 +0,0 @@
static const unsigned namingBitmap[] = {
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0x00000000, 0x04000000, 0x87FFFFFE, 0x07FFFFFE,
0x00000000, 0x00000000, 0xFF7FFFFF, 0xFF7FFFFF,
0xFFFFFFFF, 0x7FF3FFFF, 0xFFFFFDFE, 0x7FFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE00F, 0xFC31FFFF,
0x00FFFFFF, 0x00000000, 0xFFFF0000, 0xFFFFFFFF,
0xFFFFFFFF, 0xF80001FF, 0x00000003, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0xFFFFD740, 0xFFFFFFFB, 0x547F7FFF, 0x000FFFFD,
0xFFFFDFFE, 0xFFFFFFFF, 0xDFFEFFFF, 0xFFFFFFFF,
0xFFFF0003, 0xFFFFFFFF, 0xFFFF199F, 0x033FCFFF,
0x00000000, 0xFFFE0000, 0x027FFFFF, 0xFFFFFFFE,
0x0000007F, 0x00000000, 0xFFFF0000, 0x000707FF,
0x00000000, 0x07FFFFFE, 0x000007FE, 0xFFFE0000,
0xFFFFFFFF, 0x7CFFFFFF, 0x002F7FFF, 0x00000060,
0xFFFFFFE0, 0x23FFFFFF, 0xFF000000, 0x00000003,
0xFFF99FE0, 0x03C5FDFF, 0xB0000000, 0x00030003,
0xFFF987E0, 0x036DFDFF, 0x5E000000, 0x001C0000,
0xFFFBAFE0, 0x23EDFDFF, 0x00000000, 0x00000001,
0xFFF99FE0, 0x23CDFDFF, 0xB0000000, 0x00000003,
0xD63DC7E0, 0x03BFC718, 0x00000000, 0x00000000,
0xFFFDDFE0, 0x03EFFDFF, 0x00000000, 0x00000003,
0xFFFDDFE0, 0x03EFFDFF, 0x40000000, 0x00000003,
0xFFFDDFE0, 0x03FFFDFF, 0x00000000, 0x00000003,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0xFFFFFFFE, 0x000D7FFF, 0x0000003F, 0x00000000,
0xFEF02596, 0x200D6CAE, 0x0000001F, 0x00000000,
0x00000000, 0x00000000, 0xFFFFFEFF, 0x000003FF,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0xFFFFFFFF, 0xFFFF003F, 0x007FFFFF,
0x0007DAED, 0x50000000, 0x82315001, 0x002C62AB,
0x40000000, 0xF580C900, 0x00000007, 0x02010800,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0x0FFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x03FFFFFF,
0x3F3FFFFF, 0xFFFFFFFF, 0xAAFF3F3F, 0x3FFFFFFF,
0xFFFFFFFF, 0x5FDFFFFF, 0x0FCF1FDC, 0x1FDC1FFF,
0x00000000, 0x00004C40, 0x00000000, 0x00000000,
0x00000007, 0x00000000, 0x00000000, 0x00000000,
0x00000080, 0x000003FE, 0xFFFFFFFE, 0xFFFFFFFF,
0x001FFFFF, 0xFFFFFFFE, 0xFFFFFFFF, 0x07FFFFFF,
0xFFFFFFE0, 0x00001FFF, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0x0000003F, 0x00000000, 0x00000000,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0x0000000F, 0x00000000, 0x00000000,
0x00000000, 0x07FF6000, 0x87FFFFFE, 0x07FFFFFE,
0x00000000, 0x00800000, 0xFF7FFFFF, 0xFF7FFFFF,
0x00FFFFFF, 0x00000000, 0xFFFF0000, 0xFFFFFFFF,
0xFFFFFFFF, 0xF80001FF, 0x00030003, 0x00000000,
0xFFFFFFFF, 0xFFFFFFFF, 0x0000003F, 0x00000003,
0xFFFFD7C0, 0xFFFFFFFB, 0x547F7FFF, 0x000FFFFD,
0xFFFFDFFE, 0xFFFFFFFF, 0xDFFEFFFF, 0xFFFFFFFF,
0xFFFF007B, 0xFFFFFFFF, 0xFFFF199F, 0x033FCFFF,
0x00000000, 0xFFFE0000, 0x027FFFFF, 0xFFFFFFFE,
0xFFFE007F, 0xBBFFFFFB, 0xFFFF0016, 0x000707FF,
0x00000000, 0x07FFFFFE, 0x0007FFFF, 0xFFFF03FF,
0xFFFFFFFF, 0x7CFFFFFF, 0xFFEF7FFF, 0x03FF3DFF,
0xFFFFFFEE, 0xF3FFFFFF, 0xFF1E3FFF, 0x0000FFCF,
0xFFF99FEE, 0xD3C5FDFF, 0xB080399F, 0x0003FFCF,
0xFFF987E4, 0xD36DFDFF, 0x5E003987, 0x001FFFC0,
0xFFFBAFEE, 0xF3EDFDFF, 0x00003BBF, 0x0000FFC1,
0xFFF99FEE, 0xF3CDFDFF, 0xB0C0398F, 0x0000FFC3,
0xD63DC7EC, 0xC3BFC718, 0x00803DC7, 0x0000FF80,
0xFFFDDFEE, 0xC3EFFDFF, 0x00603DDF, 0x0000FFC3,
0xFFFDDFEC, 0xC3EFFDFF, 0x40603DDF, 0x0000FFC3,
0xFFFDDFEC, 0xC3FFFDFF, 0x00803DCF, 0x0000FFC3,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0xFFFFFFFE, 0x07FF7FFF, 0x03FF7FFF, 0x00000000,
0xFEF02596, 0x3BFF6CAE, 0x03FF3F5F, 0x00000000,
0x03000000, 0xC2A003FF, 0xFFFFFEFF, 0xFFFE03FF,
0xFEBF0FDF, 0x02FE3FFF, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x1FFF0000, 0x00000002,
0x000000A0, 0x003EFFFE, 0xFFFFFFFE, 0xFFFFFFFF,
0x661FFFFF, 0xFFFFFFFE, 0xFFFFFFFF, 0x77FFFFFF,
};
static const unsigned char nmstrtPages[] = {
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x00,
0x00, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x13,
0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x15, 0x16, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x17,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x18,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static const unsigned char namePages[] = {
0x19, 0x03, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x00,
0x00, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
0x10, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x13,
0x26, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x27, 0x16, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x17,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x18,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};

37
src/3rdparty/include/expat/utf8tab.h vendored
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@ -1,37 +0,0 @@
/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
/* 0x80 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0x84 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0x88 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0x8C */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0x90 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0x94 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0x98 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0x9C */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xA0 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xA4 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xA8 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xAC */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xB0 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xB4 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xB8 */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xBC */ BT_TRAIL, BT_TRAIL, BT_TRAIL, BT_TRAIL,
/* 0xC0 */ BT_LEAD2, BT_LEAD2, BT_LEAD2, BT_LEAD2,
/* 0xC4 */ BT_LEAD2, BT_LEAD2, BT_LEAD2, BT_LEAD2,
/* 0xC8 */ BT_LEAD2, BT_LEAD2, BT_LEAD2, BT_LEAD2,
/* 0xCC */ BT_LEAD2, BT_LEAD2, BT_LEAD2, BT_LEAD2,
/* 0xD0 */ BT_LEAD2, BT_LEAD2, BT_LEAD2, BT_LEAD2,
/* 0xD4 */ BT_LEAD2, BT_LEAD2, BT_LEAD2, BT_LEAD2,
/* 0xD8 */ BT_LEAD2, BT_LEAD2, BT_LEAD2, BT_LEAD2,
/* 0xDC */ BT_LEAD2, BT_LEAD2, BT_LEAD2, BT_LEAD2,
/* 0xE0 */ BT_LEAD3, BT_LEAD3, BT_LEAD3, BT_LEAD3,
/* 0xE4 */ BT_LEAD3, BT_LEAD3, BT_LEAD3, BT_LEAD3,
/* 0xE8 */ BT_LEAD3, BT_LEAD3, BT_LEAD3, BT_LEAD3,
/* 0xEC */ BT_LEAD3, BT_LEAD3, BT_LEAD3, BT_LEAD3,
/* 0xF0 */ BT_LEAD4, BT_LEAD4, BT_LEAD4, BT_LEAD4,
/* 0xF4 */ BT_LEAD4, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0xF8 */ BT_NONXML, BT_NONXML, BT_NONXML, BT_NONXML,
/* 0xFC */ BT_NONXML, BT_NONXML, BT_MALFORM, BT_MALFORM,

47
src/3rdparty/include/expat/watcomconfig.h vendored
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/* expat_config.h for use with Open Watcom 1.5 and above. */
#ifndef WATCOMCONFIG_H
#define WATCOMCONFIG_H
#ifdef __NT__
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#endif
/* 1234 = LIL_ENDIAN, 4321 = BIGENDIAN */
#define BYTEORDER 1234
/* Define to 1 if you have the `memmove' function. */
#define HAVE_MEMMOVE 1
/* Define to 1 if you have the <unistd.h> header file. */
#define HAVE_UNISTD_H 1
/* Define to the address where bug reports for this package should be sent. */
#define PACKAGE_BUGREPORT "expat-bugs@mail.libexpat.org"
/* Define to the full name of this package. */
#define PACKAGE_NAME "expat"
/* Define to the full name and version of this package. */
#define PACKAGE_STRING "expat 2.0.0"
/* Define to the one symbol short name of this package. */
#undef PACKAGE_TARNAME
/* Define to the version of this package. */
#define PACKAGE_VERSION "2.0.0"
/* Define to specify how much context to retain around the current parse
point. */
#define XML_CONTEXT_BYTES 1024
/* Define to make parameter entity parsing functionality available. */
#define XML_DTD 1
/* Define to make XML Namespaces functionality available. */
#define XML_NS 1
#endif

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src/3rdparty/include/expat/winconfig.h vendored
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/*================================================================
** Copyright 2000, Clark Cooper
** All rights reserved.
**
** This is free software. You are permitted to copy, distribute, or modify
** it under the terms of the MIT/X license (contained in the COPYING file
** with this distribution.)
*/
#ifndef WINCONFIG_H
#define WINCONFIG_H
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#include <memory.h>
#include <string.h>
#define XML_NS 1
#define XML_DTD 1
#define XML_CONTEXT_BYTES 1024
/* we will assume all Windows platforms are little endian */
#define BYTEORDER 1234
/* Windows has memmove() available. */
#define HAVE_MEMMOVE
#endif /* ndef WINCONFIG_H */

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/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
#ifndef XmlRole_INCLUDED
#define XmlRole_INCLUDED 1
#ifdef __VMS
/* 0 1 2 3 0 1 2 3
1234567890123456789012345678901 1234567890123456789012345678901 */
#define XmlPrologStateInitExternalEntity XmlPrologStateInitExternalEnt
#endif
#include "xmltok.h"
#ifdef __cplusplus
extern "C" {
#endif
enum {
XML_ROLE_ERROR = -1,
XML_ROLE_NONE = 0,
XML_ROLE_XML_DECL,
XML_ROLE_INSTANCE_START,
XML_ROLE_DOCTYPE_NONE,
XML_ROLE_DOCTYPE_NAME,
XML_ROLE_DOCTYPE_SYSTEM_ID,
XML_ROLE_DOCTYPE_PUBLIC_ID,
XML_ROLE_DOCTYPE_INTERNAL_SUBSET,
XML_ROLE_DOCTYPE_CLOSE,
XML_ROLE_GENERAL_ENTITY_NAME,
XML_ROLE_PARAM_ENTITY_NAME,
XML_ROLE_ENTITY_NONE,
XML_ROLE_ENTITY_VALUE,
XML_ROLE_ENTITY_SYSTEM_ID,
XML_ROLE_ENTITY_PUBLIC_ID,
XML_ROLE_ENTITY_COMPLETE,
XML_ROLE_ENTITY_NOTATION_NAME,
XML_ROLE_NOTATION_NONE,
XML_ROLE_NOTATION_NAME,
XML_ROLE_NOTATION_SYSTEM_ID,
XML_ROLE_NOTATION_NO_SYSTEM_ID,
XML_ROLE_NOTATION_PUBLIC_ID,
XML_ROLE_ATTRIBUTE_NAME,
XML_ROLE_ATTRIBUTE_TYPE_CDATA,
XML_ROLE_ATTRIBUTE_TYPE_ID,
XML_ROLE_ATTRIBUTE_TYPE_IDREF,
XML_ROLE_ATTRIBUTE_TYPE_IDREFS,
XML_ROLE_ATTRIBUTE_TYPE_ENTITY,
XML_ROLE_ATTRIBUTE_TYPE_ENTITIES,
XML_ROLE_ATTRIBUTE_TYPE_NMTOKEN,
XML_ROLE_ATTRIBUTE_TYPE_NMTOKENS,
XML_ROLE_ATTRIBUTE_ENUM_VALUE,
XML_ROLE_ATTRIBUTE_NOTATION_VALUE,
XML_ROLE_ATTLIST_NONE,
XML_ROLE_ATTLIST_ELEMENT_NAME,
XML_ROLE_IMPLIED_ATTRIBUTE_VALUE,
XML_ROLE_REQUIRED_ATTRIBUTE_VALUE,
XML_ROLE_DEFAULT_ATTRIBUTE_VALUE,
XML_ROLE_FIXED_ATTRIBUTE_VALUE,
XML_ROLE_ELEMENT_NONE,
XML_ROLE_ELEMENT_NAME,
XML_ROLE_CONTENT_ANY,
XML_ROLE_CONTENT_EMPTY,
XML_ROLE_CONTENT_PCDATA,
XML_ROLE_GROUP_OPEN,
XML_ROLE_GROUP_CLOSE,
XML_ROLE_GROUP_CLOSE_REP,
XML_ROLE_GROUP_CLOSE_OPT,
XML_ROLE_GROUP_CLOSE_PLUS,
XML_ROLE_GROUP_CHOICE,
XML_ROLE_GROUP_SEQUENCE,
XML_ROLE_CONTENT_ELEMENT,
XML_ROLE_CONTENT_ELEMENT_REP,
XML_ROLE_CONTENT_ELEMENT_OPT,
XML_ROLE_CONTENT_ELEMENT_PLUS,
XML_ROLE_PI,
XML_ROLE_COMMENT,
#ifdef XML_DTD
XML_ROLE_TEXT_DECL,
XML_ROLE_IGNORE_SECT,
XML_ROLE_INNER_PARAM_ENTITY_REF,
#endif /* XML_DTD */
XML_ROLE_PARAM_ENTITY_REF
};
typedef struct prolog_state {
int (PTRCALL *handler) (struct prolog_state *state,
int tok,
const char *ptr,
const char *end,
const ENCODING *enc);
unsigned level;
int role_none;
#ifdef XML_DTD
unsigned includeLevel;
int documentEntity;
int inEntityValue;
#endif /* XML_DTD */
} PROLOG_STATE;
void XmlPrologStateInit(PROLOG_STATE *);
#ifdef XML_DTD
void XmlPrologStateInitExternalEntity(PROLOG_STATE *);
#endif /* XML_DTD */
#define XmlTokenRole(state, tok, ptr, end, enc) \
(((state)->handler)(state, tok, ptr, end, enc))
#ifdef __cplusplus
}
#endif
#endif /* not XmlRole_INCLUDED */

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/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
#ifndef XmlTok_INCLUDED
#define XmlTok_INCLUDED 1
#ifdef __cplusplus
extern "C" {
#endif
/* The following token may be returned by XmlContentTok */
#define XML_TOK_TRAILING_RSQB -5 /* ] or ]] at the end of the scan; might be
start of illegal ]]> sequence */
/* The following tokens may be returned by both XmlPrologTok and
XmlContentTok.
*/
#define XML_TOK_NONE -4 /* The string to be scanned is empty */
#define XML_TOK_TRAILING_CR -3 /* A CR at the end of the scan;
might be part of CRLF sequence */
#define XML_TOK_PARTIAL_CHAR -2 /* only part of a multibyte sequence */
#define XML_TOK_PARTIAL -1 /* only part of a token */
#define XML_TOK_INVALID 0
/* The following tokens are returned by XmlContentTok; some are also
returned by XmlAttributeValueTok, XmlEntityTok, XmlCdataSectionTok.
*/
#define XML_TOK_START_TAG_WITH_ATTS 1
#define XML_TOK_START_TAG_NO_ATTS 2
#define XML_TOK_EMPTY_ELEMENT_WITH_ATTS 3 /* empty element tag <e/> */
#define XML_TOK_EMPTY_ELEMENT_NO_ATTS 4
#define XML_TOK_END_TAG 5
#define XML_TOK_DATA_CHARS 6
#define XML_TOK_DATA_NEWLINE 7
#define XML_TOK_CDATA_SECT_OPEN 8
#define XML_TOK_ENTITY_REF 9
#define XML_TOK_CHAR_REF 10 /* numeric character reference */
/* The following tokens may be returned by both XmlPrologTok and
XmlContentTok.
*/
#define XML_TOK_PI 11 /* processing instruction */
#define XML_TOK_XML_DECL 12 /* XML decl or text decl */
#define XML_TOK_COMMENT 13
#define XML_TOK_BOM 14 /* Byte order mark */
/* The following tokens are returned only by XmlPrologTok */
#define XML_TOK_PROLOG_S 15
#define XML_TOK_DECL_OPEN 16 /* <!foo */
#define XML_TOK_DECL_CLOSE 17 /* > */
#define XML_TOK_NAME 18
#define XML_TOK_NMTOKEN 19
#define XML_TOK_POUND_NAME 20 /* #name */
#define XML_TOK_OR 21 /* | */
#define XML_TOK_PERCENT 22
#define XML_TOK_OPEN_PAREN 23
#define XML_TOK_CLOSE_PAREN 24
#define XML_TOK_OPEN_BRACKET 25
#define XML_TOK_CLOSE_BRACKET 26
#define XML_TOK_LITERAL 27
#define XML_TOK_PARAM_ENTITY_REF 28
#define XML_TOK_INSTANCE_START 29
/* The following occur only in element type declarations */
#define XML_TOK_NAME_QUESTION 30 /* name? */
#define XML_TOK_NAME_ASTERISK 31 /* name* */
#define XML_TOK_NAME_PLUS 32 /* name+ */
#define XML_TOK_COND_SECT_OPEN 33 /* <![ */
#define XML_TOK_COND_SECT_CLOSE 34 /* ]]> */
#define XML_TOK_CLOSE_PAREN_QUESTION 35 /* )? */
#define XML_TOK_CLOSE_PAREN_ASTERISK 36 /* )* */
#define XML_TOK_CLOSE_PAREN_PLUS 37 /* )+ */
#define XML_TOK_COMMA 38
/* The following token is returned only by XmlAttributeValueTok */
#define XML_TOK_ATTRIBUTE_VALUE_S 39
/* The following token is returned only by XmlCdataSectionTok */
#define XML_TOK_CDATA_SECT_CLOSE 40
/* With namespace processing this is returned by XmlPrologTok for a
name with a colon.
*/
#define XML_TOK_PREFIXED_NAME 41
#ifdef XML_DTD
#define XML_TOK_IGNORE_SECT 42
#endif /* XML_DTD */
#ifdef XML_DTD
#define XML_N_STATES 4
#else /* not XML_DTD */
#define XML_N_STATES 3
#endif /* not XML_DTD */
#define XML_PROLOG_STATE 0
#define XML_CONTENT_STATE 1
#define XML_CDATA_SECTION_STATE 2
#ifdef XML_DTD
#define XML_IGNORE_SECTION_STATE 3
#endif /* XML_DTD */
#define XML_N_LITERAL_TYPES 2
#define XML_ATTRIBUTE_VALUE_LITERAL 0
#define XML_ENTITY_VALUE_LITERAL 1
/* The size of the buffer passed to XmlUtf8Encode must be at least this. */
#define XML_UTF8_ENCODE_MAX 4
/* The size of the buffer passed to XmlUtf16Encode must be at least this. */
#define XML_UTF16_ENCODE_MAX 2
typedef struct position {
/* first line and first column are 0 not 1 */
XML_Size lineNumber;
XML_Size columnNumber;
} POSITION;
typedef struct {
const char *name;
const char *valuePtr;
const char *valueEnd;
char normalized;
} ATTRIBUTE;
struct encoding;
typedef struct encoding ENCODING;
typedef int (PTRCALL *SCANNER)(const ENCODING *,
const char *,
const char *,
const char **);
struct encoding {
SCANNER scanners[XML_N_STATES];
SCANNER literalScanners[XML_N_LITERAL_TYPES];
int (PTRCALL *sameName)(const ENCODING *,
const char *,
const char *);
int (PTRCALL *nameMatchesAscii)(const ENCODING *,
const char *,
const char *,
const char *);
int (PTRFASTCALL *nameLength)(const ENCODING *, const char *);
const char *(PTRFASTCALL *skipS)(const ENCODING *, const char *);
int (PTRCALL *getAtts)(const ENCODING *enc,
const char *ptr,
int attsMax,
ATTRIBUTE *atts);
int (PTRFASTCALL *charRefNumber)(const ENCODING *enc, const char *ptr);
int (PTRCALL *predefinedEntityName)(const ENCODING *,
const char *,
const char *);
void (PTRCALL *updatePosition)(const ENCODING *,
const char *ptr,
const char *end,
POSITION *);
int (PTRCALL *isPublicId)(const ENCODING *enc,
const char *ptr,
const char *end,
const char **badPtr);
void (PTRCALL *utf8Convert)(const ENCODING *enc,
const char **fromP,
const char *fromLim,
char **toP,
const char *toLim);
void (PTRCALL *utf16Convert)(const ENCODING *enc,
const char **fromP,
const char *fromLim,
unsigned short **toP,
const unsigned short *toLim);
int minBytesPerChar;
char isUtf8;
char isUtf16;
};
/* Scan the string starting at ptr until the end of the next complete
token, but do not scan past eptr. Return an integer giving the
type of token.
Return XML_TOK_NONE when ptr == eptr; nextTokPtr will not be set.
Return XML_TOK_PARTIAL when the string does not contain a complete
token; nextTokPtr will not be set.
Return XML_TOK_INVALID when the string does not start a valid
token; nextTokPtr will be set to point to the character which made
the token invalid.
Otherwise the string starts with a valid token; nextTokPtr will be
set to point to the character following the end of that token.
Each data character counts as a single token, but adjacent data
characters may be returned together. Similarly for characters in
the prolog outside literals, comments and processing instructions.
*/
#define XmlTok(enc, state, ptr, end, nextTokPtr) \
(((enc)->scanners[state])(enc, ptr, end, nextTokPtr))
#define XmlPrologTok(enc, ptr, end, nextTokPtr) \
XmlTok(enc, XML_PROLOG_STATE, ptr, end, nextTokPtr)
#define XmlContentTok(enc, ptr, end, nextTokPtr) \
XmlTok(enc, XML_CONTENT_STATE, ptr, end, nextTokPtr)
#define XmlCdataSectionTok(enc, ptr, end, nextTokPtr) \
XmlTok(enc, XML_CDATA_SECTION_STATE, ptr, end, nextTokPtr)
#ifdef XML_DTD
#define XmlIgnoreSectionTok(enc, ptr, end, nextTokPtr) \
XmlTok(enc, XML_IGNORE_SECTION_STATE, ptr, end, nextTokPtr)
#endif /* XML_DTD */
/* This is used for performing a 2nd-level tokenization on the content
of a literal that has already been returned by XmlTok.
*/
#define XmlLiteralTok(enc, literalType, ptr, end, nextTokPtr) \
(((enc)->literalScanners[literalType])(enc, ptr, end, nextTokPtr))
#define XmlAttributeValueTok(enc, ptr, end, nextTokPtr) \
XmlLiteralTok(enc, XML_ATTRIBUTE_VALUE_LITERAL, ptr, end, nextTokPtr)
#define XmlEntityValueTok(enc, ptr, end, nextTokPtr) \
XmlLiteralTok(enc, XML_ENTITY_VALUE_LITERAL, ptr, end, nextTokPtr)
#define XmlSameName(enc, ptr1, ptr2) (((enc)->sameName)(enc, ptr1, ptr2))
#define XmlNameMatchesAscii(enc, ptr1, end1, ptr2) \
(((enc)->nameMatchesAscii)(enc, ptr1, end1, ptr2))
#define XmlNameLength(enc, ptr) \
(((enc)->nameLength)(enc, ptr))
#define XmlSkipS(enc, ptr) \
(((enc)->skipS)(enc, ptr))
#define XmlGetAttributes(enc, ptr, attsMax, atts) \
(((enc)->getAtts)(enc, ptr, attsMax, atts))
#define XmlCharRefNumber(enc, ptr) \
(((enc)->charRefNumber)(enc, ptr))
#define XmlPredefinedEntityName(enc, ptr, end) \
(((enc)->predefinedEntityName)(enc, ptr, end))
#define XmlUpdatePosition(enc, ptr, end, pos) \
(((enc)->updatePosition)(enc, ptr, end, pos))
#define XmlIsPublicId(enc, ptr, end, badPtr) \
(((enc)->isPublicId)(enc, ptr, end, badPtr))
#define XmlUtf8Convert(enc, fromP, fromLim, toP, toLim) \
(((enc)->utf8Convert)(enc, fromP, fromLim, toP, toLim))
#define XmlUtf16Convert(enc, fromP, fromLim, toP, toLim) \
(((enc)->utf16Convert)(enc, fromP, fromLim, toP, toLim))
typedef struct {
ENCODING initEnc;
const ENCODING **encPtr;
} INIT_ENCODING;
int XmlParseXmlDecl(int isGeneralTextEntity,
const ENCODING *enc,
const char *ptr,
const char *end,
const char **badPtr,
const char **versionPtr,
const char **versionEndPtr,
const char **encodingNamePtr,
const ENCODING **namedEncodingPtr,
int *standalonePtr);
int XmlInitEncoding(INIT_ENCODING *, const ENCODING **, const char *name);
const ENCODING *XmlGetUtf8InternalEncoding(void);
const ENCODING *XmlGetUtf16InternalEncoding(void);
int FASTCALL XmlUtf8Encode(int charNumber, char *buf);
int FASTCALL XmlUtf16Encode(int charNumber, unsigned short *buf);
int XmlSizeOfUnknownEncoding(void);
typedef int (XMLCALL *CONVERTER) (void *userData, const char *p);
ENCODING *
XmlInitUnknownEncoding(void *mem,
int *table,
CONVERTER convert,
void *userData);
int XmlParseXmlDeclNS(int isGeneralTextEntity,
const ENCODING *enc,
const char *ptr,
const char *end,
const char **badPtr,
const char **versionPtr,
const char **versionEndPtr,
const char **encodingNamePtr,
const ENCODING **namedEncodingPtr,
int *standalonePtr);
int XmlInitEncodingNS(INIT_ENCODING *, const ENCODING **, const char *name);
const ENCODING *XmlGetUtf8InternalEncodingNS(void);
const ENCODING *XmlGetUtf16InternalEncodingNS(void);
ENCODING *
XmlInitUnknownEncodingNS(void *mem,
int *table,
CONVERTER convert,
void *userData);
#ifdef __cplusplus
}
#endif
#endif /* not XmlTok_INCLUDED */

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/*
Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
enum {
BT_NONXML,
BT_MALFORM,
BT_LT,
BT_AMP,
BT_RSQB,
BT_LEAD2,
BT_LEAD3,
BT_LEAD4,
BT_TRAIL,
BT_CR,
BT_LF,
BT_GT,
BT_QUOT,
BT_APOS,
BT_EQUALS,
BT_QUEST,
BT_EXCL,
BT_SOL,
BT_SEMI,
BT_NUM,
BT_LSQB,
BT_S,
BT_NMSTRT,
BT_COLON,
BT_HEX,
BT_DIGIT,
BT_NAME,
BT_MINUS,
BT_OTHER, /* known not to be a name or name start character */
BT_NONASCII, /* might be a name or name start character */
BT_PERCNT,
BT_LPAR,
BT_RPAR,
BT_AST,
BT_PLUS,
BT_COMMA,
BT_VERBAR
};
#include <stddef.h>

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/*
* cderror.h
*
* Copyright (C) 1994-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file defines the error and message codes for the cjpeg/djpeg
* applications. These strings are not needed as part of the JPEG library
* proper.
* Edit this file to add new codes, or to translate the message strings to
* some other language.
*/
/*
* To define the enum list of message codes, include this file without
* defining macro JMESSAGE. To create a message string table, include it
* again with a suitable JMESSAGE definition (see jerror.c for an example).
*/
#ifndef JMESSAGE
#ifndef CDERROR_H
#define CDERROR_H
/* First time through, define the enum list */
#define JMAKE_ENUM_LIST
#else
/* Repeated inclusions of this file are no-ops unless JMESSAGE is defined */
#define JMESSAGE(code,string)
#endif /* CDERROR_H */
#endif /* JMESSAGE */
#ifdef JMAKE_ENUM_LIST
typedef enum {
#define JMESSAGE(code,string) code ,
#endif /* JMAKE_ENUM_LIST */
JMESSAGE(JMSG_FIRSTADDONCODE=1000, NULL) /* Must be first entry! */
#ifdef BMP_SUPPORTED
JMESSAGE(JERR_BMP_BADCMAP, "Unsupported BMP colormap format")
JMESSAGE(JERR_BMP_BADDEPTH, "Only 8- and 24-bit BMP files are supported")
JMESSAGE(JERR_BMP_BADHEADER, "Invalid BMP file: bad header length")
JMESSAGE(JERR_BMP_BADPLANES, "Invalid BMP file: biPlanes not equal to 1")
JMESSAGE(JERR_BMP_COLORSPACE, "BMP output must be grayscale or RGB")
JMESSAGE(JERR_BMP_COMPRESSED, "Sorry, compressed BMPs not yet supported")
JMESSAGE(JERR_BMP_NOT, "Not a BMP file - does not start with BM")
JMESSAGE(JTRC_BMP, "%ux%u 24-bit BMP image")
JMESSAGE(JTRC_BMP_MAPPED, "%ux%u 8-bit colormapped BMP image")
JMESSAGE(JTRC_BMP_OS2, "%ux%u 24-bit OS2 BMP image")
JMESSAGE(JTRC_BMP_OS2_MAPPED, "%ux%u 8-bit colormapped OS2 BMP image")
#endif /* BMP_SUPPORTED */
#ifdef GIF_SUPPORTED
JMESSAGE(JERR_GIF_BUG, "GIF output got confused")
JMESSAGE(JERR_GIF_CODESIZE, "Bogus GIF codesize %d")
JMESSAGE(JERR_GIF_COLORSPACE, "GIF output must be grayscale or RGB")
JMESSAGE(JERR_GIF_IMAGENOTFOUND, "Too few images in GIF file")
JMESSAGE(JERR_GIF_NOT, "Not a GIF file")
JMESSAGE(JTRC_GIF, "%ux%ux%d GIF image")
JMESSAGE(JTRC_GIF_BADVERSION,
"Warning: unexpected GIF version number '%c%c%c'")
JMESSAGE(JTRC_GIF_EXTENSION, "Ignoring GIF extension block of type 0x%02x")
JMESSAGE(JTRC_GIF_NONSQUARE, "Caution: nonsquare pixels in input")
JMESSAGE(JWRN_GIF_BADDATA, "Corrupt data in GIF file")
JMESSAGE(JWRN_GIF_CHAR, "Bogus char 0x%02x in GIF file, ignoring")
JMESSAGE(JWRN_GIF_ENDCODE, "Premature end of GIF image")
JMESSAGE(JWRN_GIF_NOMOREDATA, "Ran out of GIF bits")
#endif /* GIF_SUPPORTED */
#ifdef PPM_SUPPORTED
JMESSAGE(JERR_PPM_COLORSPACE, "PPM output must be grayscale or RGB")
JMESSAGE(JERR_PPM_NONNUMERIC, "Nonnumeric data in PPM file")
JMESSAGE(JERR_PPM_NOT, "Not a PPM/PGM file")
JMESSAGE(JTRC_PGM, "%ux%u PGM image")
JMESSAGE(JTRC_PGM_TEXT, "%ux%u text PGM image")
JMESSAGE(JTRC_PPM, "%ux%u PPM image")
JMESSAGE(JTRC_PPM_TEXT, "%ux%u text PPM image")
#endif /* PPM_SUPPORTED */
#ifdef RLE_SUPPORTED
JMESSAGE(JERR_RLE_BADERROR, "Bogus error code from RLE library")
JMESSAGE(JERR_RLE_COLORSPACE, "RLE output must be grayscale or RGB")
JMESSAGE(JERR_RLE_DIMENSIONS, "Image dimensions (%ux%u) too large for RLE")
JMESSAGE(JERR_RLE_EMPTY, "Empty RLE file")
JMESSAGE(JERR_RLE_EOF, "Premature EOF in RLE header")
JMESSAGE(JERR_RLE_MEM, "Insufficient memory for RLE header")
JMESSAGE(JERR_RLE_NOT, "Not an RLE file")
JMESSAGE(JERR_RLE_TOOMANYCHANNELS, "Cannot handle %d output channels for RLE")
JMESSAGE(JERR_RLE_UNSUPPORTED, "Cannot handle this RLE setup")
JMESSAGE(JTRC_RLE, "%ux%u full-color RLE file")
JMESSAGE(JTRC_RLE_FULLMAP, "%ux%u full-color RLE file with map of length %d")
JMESSAGE(JTRC_RLE_GRAY, "%ux%u grayscale RLE file")
JMESSAGE(JTRC_RLE_MAPGRAY, "%ux%u grayscale RLE file with map of length %d")
JMESSAGE(JTRC_RLE_MAPPED, "%ux%u colormapped RLE file with map of length %d")
#endif /* RLE_SUPPORTED */
#ifdef TARGA_SUPPORTED
JMESSAGE(JERR_TGA_BADCMAP, "Unsupported Targa colormap format")
JMESSAGE(JERR_TGA_BADPARMS, "Invalid or unsupported Targa file")
JMESSAGE(JERR_TGA_COLORSPACE, "Targa output must be grayscale or RGB")
JMESSAGE(JTRC_TGA, "%ux%u RGB Targa image")
JMESSAGE(JTRC_TGA_GRAY, "%ux%u grayscale Targa image")
JMESSAGE(JTRC_TGA_MAPPED, "%ux%u colormapped Targa image")
#else
JMESSAGE(JERR_TGA_NOTCOMP, "Targa support was not compiled")
#endif /* TARGA_SUPPORTED */
JMESSAGE(JERR_BAD_CMAP_FILE,
"Color map file is invalid or of unsupported format")
JMESSAGE(JERR_TOO_MANY_COLORS,
"Output file format cannot handle %d colormap entries")
JMESSAGE(JERR_UNGETC_FAILED, "ungetc failed")
#ifdef TARGA_SUPPORTED
JMESSAGE(JERR_UNKNOWN_FORMAT,
"Unrecognized input file format --- perhaps you need -targa")
#else
JMESSAGE(JERR_UNKNOWN_FORMAT, "Unrecognized input file format")
#endif
JMESSAGE(JERR_UNSUPPORTED_FORMAT, "Unsupported output file format")
#ifdef JMAKE_ENUM_LIST
JMSG_LASTADDONCODE
} ADDON_MESSAGE_CODE;
#undef JMAKE_ENUM_LIST
#endif /* JMAKE_ENUM_LIST */
/* Zap JMESSAGE macro so that future re-inclusions do nothing by default */
#undef JMESSAGE

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/*
* cdjpeg.h
*
* Copyright (C) 1994-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains common declarations for the sample applications
* cjpeg and djpeg. It is NOT used by the core JPEG library.
*/
#define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
#define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
#include "jinclude.h"
#include "jpeglib.h"
#include "jerror.h" /* get library error codes too */
#include "cderror.h" /* get application-specific error codes */
/*
* Object interface for cjpeg's source file decoding modules
*/
typedef struct cjpeg_source_struct * cjpeg_source_ptr;
struct cjpeg_source_struct {
JMETHOD(void, start_input, (j_compress_ptr cinfo,
cjpeg_source_ptr sinfo));
JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo,
cjpeg_source_ptr sinfo));
JMETHOD(void, finish_input, (j_compress_ptr cinfo,
cjpeg_source_ptr sinfo));
FILE *input_file;
JSAMPARRAY buffer;
JDIMENSION buffer_height;
};
/*
* Object interface for djpeg's output file encoding modules
*/
typedef struct djpeg_dest_struct * djpeg_dest_ptr;
struct djpeg_dest_struct {
/* start_output is called after jpeg_start_decompress finishes.
* The color map will be ready at this time, if one is needed.
*/
JMETHOD(void, start_output, (j_decompress_ptr cinfo,
djpeg_dest_ptr dinfo));
/* Emit the specified number of pixel rows from the buffer. */
JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo,
djpeg_dest_ptr dinfo,
JDIMENSION rows_supplied));
/* Finish up at the end of the image. */
JMETHOD(void, finish_output, (j_decompress_ptr cinfo,
djpeg_dest_ptr dinfo));
/* Target file spec; filled in by djpeg.c after object is created. */
FILE * output_file;
/* Output pixel-row buffer. Created by module init or start_output.
* Width is cinfo->output_width * cinfo->output_components;
* height is buffer_height.
*/
JSAMPARRAY buffer;
JDIMENSION buffer_height;
};
/*
* cjpeg/djpeg may need to perform extra passes to convert to or from
* the source/destination file format. The JPEG library does not know
* about these passes, but we'd like them to be counted by the progress
* monitor. We use an expanded progress monitor object to hold the
* additional pass count.
*/
struct cdjpeg_progress_mgr {
struct jpeg_progress_mgr pub; /* fields known to JPEG library */
int completed_extra_passes; /* extra passes completed */
int total_extra_passes; /* total extra */
/* last printed percentage stored here to avoid multiple printouts */
int percent_done;
};
typedef struct cdjpeg_progress_mgr * cd_progress_ptr;
/* Short forms of external names for systems with brain-damaged linkers. */
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jinit_read_bmp jIRdBMP
#define jinit_write_bmp jIWrBMP
#define jinit_read_gif jIRdGIF
#define jinit_write_gif jIWrGIF
#define jinit_read_ppm jIRdPPM
#define jinit_write_ppm jIWrPPM
#define jinit_read_rle jIRdRLE
#define jinit_write_rle jIWrRLE
#define jinit_read_targa jIRdTarga
#define jinit_write_targa jIWrTarga
#define read_quant_tables RdQTables
#define read_scan_script RdScnScript
#define set_quant_slots SetQSlots
#define set_sample_factors SetSFacts
#define read_color_map RdCMap
#define enable_signal_catcher EnSigCatcher
#define start_progress_monitor StProgMon
#define end_progress_monitor EnProgMon
#define read_stdin RdStdin
#define write_stdout WrStdout
#endif /* NEED_SHORT_EXTERNAL_NAMES */
/* Module selection routines for I/O modules. */
EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo));
EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo,
boolean is_os2));
EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo));
EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo));
EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo));
EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo));
EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo));
EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo));
EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo));
EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo));
/* cjpeg support routines (in rdswitch.c) */
EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename,
int scale_factor, boolean force_baseline));
EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename));
EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg));
EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg));
/* djpeg support routines (in rdcolmap.c) */
EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
/* common support routines (in cdjpeg.c) */
EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo));
EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo,
cd_progress_ptr progress));
EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo));
EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars));
EXTERN(FILE *) read_stdin JPP((void));
EXTERN(FILE *) write_stdout JPP((void));
/* miscellaneous useful macros */
#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
#define READ_BINARY "r"
#define WRITE_BINARY "w"
#else
#ifdef VMS /* VMS is very nonstandard */
#define READ_BINARY "rb", "ctx=stm"
#define WRITE_BINARY "wb", "ctx=stm"
#else /* standard ANSI-compliant case */
#define READ_BINARY "rb"
#define WRITE_BINARY "wb"
#endif
#endif
#ifndef EXIT_FAILURE /* define exit() codes if not provided */
#define EXIT_FAILURE 1
#endif
#ifndef EXIT_SUCCESS
#ifdef VMS
#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
#else
#define EXIT_SUCCESS 0
#endif
#endif
#ifndef EXIT_WARNING
#ifdef VMS
#define EXIT_WARNING 1 /* VMS is very nonstandard */
#else
#define EXIT_WARNING 2
#endif
#endif

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/*
* jchuff.h
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains declarations for Huffman entropy encoding routines
* that are shared between the sequential encoder (jchuff.c) and the
* progressive encoder (jcphuff.c). No other modules need to see these.
*/
/* The legal range of a DCT coefficient is
* -1024 .. +1023 for 8-bit data;
* -16384 .. +16383 for 12-bit data.
* Hence the magnitude should always fit in 10 or 14 bits respectively.
*/
#if BITS_IN_JSAMPLE == 8
#define MAX_COEF_BITS 10
#else
#define MAX_COEF_BITS 14
#endif
/* Derived data constructed for each Huffman table */
typedef struct {
unsigned int ehufco[256]; /* code for each symbol */
char ehufsi[256]; /* length of code for each symbol */
/* If no code has been allocated for a symbol S, ehufsi[S] contains 0 */
} c_derived_tbl;
/* Short forms of external names for systems with brain-damaged linkers. */
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jpeg_make_c_derived_tbl jMkCDerived
#define jpeg_gen_optimal_table jGenOptTbl
#endif /* NEED_SHORT_EXTERNAL_NAMES */
/* Expand a Huffman table definition into the derived format */
EXTERN(void) jpeg_make_c_derived_tbl
JPP((j_compress_ptr cinfo, boolean isDC, int tblno,
c_derived_tbl ** pdtbl));
/* Generate an optimal table definition given the specified counts */
EXTERN(void) jpeg_gen_optimal_table
JPP((j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[]));

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/* jconfig.vc --- jconfig.h for Microsoft Visual C++ on Windows 95 or NT. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS /* we presume a 32-bit flat memory model */
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
/* Define "boolean" as unsigned char, not int, per Windows custom */
#ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */
typedef unsigned char boolean;
#endif
#define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE /* optional */
#define USE_SETMODE /* Microsoft has setmode() */
#undef NEED_SIGNAL_CATCHER
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */
#define USE_MSDOS_MEMMGR

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/*
* jdct.h
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This include file contains common declarations for the forward and
* inverse DCT modules. These declarations are private to the DCT managers
* (jcdctmgr.c, jddctmgr.c) and the individual DCT algorithms.
* The individual DCT algorithms are kept in separate files to ease
* machine-dependent tuning (e.g., assembly coding).
*/
/*
* A forward DCT routine is given a pointer to a work area of type DCTELEM[];
* the DCT is to be performed in-place in that buffer. Type DCTELEM is int
* for 8-bit samples, INT32 for 12-bit samples. (NOTE: Floating-point DCT
* implementations use an array of type FAST_FLOAT, instead.)
* The DCT inputs are expected to be signed (range +-CENTERJSAMPLE).
* The DCT outputs are returned scaled up by a factor of 8; they therefore
* have a range of +-8K for 8-bit data, +-128K for 12-bit data. This
* convention improves accuracy in integer implementations and saves some
* work in floating-point ones.
* Quantization of the output coefficients is done by jcdctmgr.c.
*/
#if BITS_IN_JSAMPLE == 8
typedef int DCTELEM; /* 16 or 32 bits is fine */
#else
typedef INT32 DCTELEM; /* must have 32 bits */
#endif
typedef JMETHOD(void, forward_DCT_method_ptr, (DCTELEM * data));
typedef JMETHOD(void, float_DCT_method_ptr, (FAST_FLOAT * data));
/*
* An inverse DCT routine is given a pointer to the input JBLOCK and a pointer
* to an output sample array. The routine must dequantize the input data as
* well as perform the IDCT; for dequantization, it uses the multiplier table
* pointed to by compptr->dct_table. The output data is to be placed into the
* sample array starting at a specified column. (Any row offset needed will
* be applied to the array pointer before it is passed to the IDCT code.)
* Note that the number of samples emitted by the IDCT routine is
* DCT_scaled_size * DCT_scaled_size.
*/
/* typedef inverse_DCT_method_ptr is declared in jpegint.h */
/*
* Each IDCT routine has its own ideas about the best dct_table element type.
*/
typedef MULTIPLIER ISLOW_MULT_TYPE; /* short or int, whichever is faster */
#if BITS_IN_JSAMPLE == 8
typedef MULTIPLIER IFAST_MULT_TYPE; /* 16 bits is OK, use short if faster */
#define IFAST_SCALE_BITS 2 /* fractional bits in scale factors */
#else
typedef INT32 IFAST_MULT_TYPE; /* need 32 bits for scaled quantizers */
#define IFAST_SCALE_BITS 13 /* fractional bits in scale factors */
#endif
typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */
/*
* Each IDCT routine is responsible for range-limiting its results and
* converting them to unsigned form (0..MAXJSAMPLE). The raw outputs could
* be quite far out of range if the input data is corrupt, so a bulletproof
* range-limiting step is required. We use a mask-and-table-lookup method
* to do the combined operations quickly. See the comments with
* prepare_range_limit_table (in jdmaster.c) for more info.
*/
#define IDCT_range_limit(cinfo) ((cinfo)->sample_range_limit + CENTERJSAMPLE)
#define RANGE_MASK (MAXJSAMPLE * 4 + 3) /* 2 bits wider than legal samples */
/* Short forms of external names for systems with brain-damaged linkers. */
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jpeg_fdct_islow jFDislow
#define jpeg_fdct_ifast jFDifast
#define jpeg_fdct_float jFDfloat
#define jpeg_idct_islow jRDislow
#define jpeg_idct_ifast jRDifast
#define jpeg_idct_float jRDfloat
#define jpeg_idct_4x4 jRD4x4
#define jpeg_idct_2x2 jRD2x2
#define jpeg_idct_1x1 jRD1x1
#endif /* NEED_SHORT_EXTERNAL_NAMES */
/* Extern declarations for the forward and inverse DCT routines. */
EXTERN(void) jpeg_fdct_islow JPP((DCTELEM * data));
EXTERN(void) jpeg_fdct_ifast JPP((DCTELEM * data));
EXTERN(void) jpeg_fdct_float JPP((FAST_FLOAT * data));
EXTERN(void) jpeg_idct_islow
JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
EXTERN(void) jpeg_idct_ifast
JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
EXTERN(void) jpeg_idct_float
JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
EXTERN(void) jpeg_idct_4x4
JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
EXTERN(void) jpeg_idct_2x2
JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
EXTERN(void) jpeg_idct_1x1
JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
/*
* Macros for handling fixed-point arithmetic; these are used by many
* but not all of the DCT/IDCT modules.
*
* All values are expected to be of type INT32.
* Fractional constants are scaled left by CONST_BITS bits.
* CONST_BITS is defined within each module using these macros,
* and may differ from one module to the next.
*/
#define ONE ((INT32) 1)
#define CONST_SCALE (ONE << CONST_BITS)
/* Convert a positive real constant to an integer scaled by CONST_SCALE.
* Caution: some C compilers fail to reduce "FIX(constant)" at compile time,
* thus causing a lot of useless floating-point operations at run time.
*/
#define FIX(x) ((INT32) ((x) * CONST_SCALE + 0.5))
/* Descale and correctly round an INT32 value that's scaled by N bits.
* We assume RIGHT_SHIFT rounds towards minus infinity, so adding
* the fudge factor is correct for either sign of X.
*/
#define DESCALE(x,n) RIGHT_SHIFT((x) + (ONE << ((n)-1)), n)
/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
* This macro is used only when the two inputs will actually be no more than
* 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a
* full 32x32 multiply. This provides a useful speedup on many machines.
* Unfortunately there is no way to specify a 16x16->32 multiply portably
* in C, but some C compilers will do the right thing if you provide the
* correct combination of casts.
*/
#ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */
#define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT16) (const)))
#endif
#ifdef SHORTxLCONST_32 /* known to work with Microsoft C 6.0 */
#define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT32) (const)))
#endif
#ifndef MULTIPLY16C16 /* default definition */
#define MULTIPLY16C16(var,const) ((var) * (const))
#endif
/* Same except both inputs are variables. */
#ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */
#define MULTIPLY16V16(var1,var2) (((INT16) (var1)) * ((INT16) (var2)))
#endif
#ifndef MULTIPLY16V16 /* default definition */
#define MULTIPLY16V16(var1,var2) ((var1) * (var2))
#endif

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/*
* jdhuff.h
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains declarations for Huffman entropy decoding routines
* that are shared between the sequential decoder (jdhuff.c) and the
* progressive decoder (jdphuff.c). No other modules need to see these.
*/
/* Short forms of external names for systems with brain-damaged linkers. */
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jpeg_make_d_derived_tbl jMkDDerived
#define jpeg_fill_bit_buffer jFilBitBuf
#define jpeg_huff_decode jHufDecode
#endif /* NEED_SHORT_EXTERNAL_NAMES */
/* Derived data constructed for each Huffman table */
#define HUFF_LOOKAHEAD 8 /* # of bits of lookahead */
typedef struct {
/* Basic tables: (element [0] of each array is unused) */
INT32 maxcode[18]; /* largest code of length k (-1 if none) */
/* (maxcode[17] is a sentinel to ensure jpeg_huff_decode terminates) */
INT32 valoffset[17]; /* huffval[] offset for codes of length k */
/* valoffset[k] = huffval[] index of 1st symbol of code length k, less
* the smallest code of length k; so given a code of length k, the
* corresponding symbol is huffval[code + valoffset[k]]
*/
/* Link to public Huffman table (needed only in jpeg_huff_decode) */
JHUFF_TBL *pub;
/* Lookahead tables: indexed by the next HUFF_LOOKAHEAD bits of
* the input data stream. If the next Huffman code is no more
* than HUFF_LOOKAHEAD bits long, we can obtain its length and
* the corresponding symbol directly from these tables.
*/
int look_nbits[1<<HUFF_LOOKAHEAD]; /* # bits, or 0 if too long */
UINT8 look_sym[1<<HUFF_LOOKAHEAD]; /* symbol, or unused */
} d_derived_tbl;
/* Expand a Huffman table definition into the derived format */
EXTERN(void) jpeg_make_d_derived_tbl
JPP((j_decompress_ptr cinfo, boolean isDC, int tblno,
d_derived_tbl ** pdtbl));
/*
* Fetching the next N bits from the input stream is a time-critical operation
* for the Huffman decoders. We implement it with a combination of inline
* macros and out-of-line subroutines. Note that N (the number of bits
* demanded at one time) never exceeds 15 for JPEG use.
*
* We read source bytes into get_buffer and dole out bits as needed.
* If get_buffer already contains enough bits, they are fetched in-line
* by the macros CHECK_BIT_BUFFER and GET_BITS. When there aren't enough
* bits, jpeg_fill_bit_buffer is called; it will attempt to fill get_buffer
* as full as possible (not just to the number of bits needed; this
* prefetching reduces the overhead cost of calling jpeg_fill_bit_buffer).
* Note that jpeg_fill_bit_buffer may return FALSE to indicate suspension.
* On TRUE return, jpeg_fill_bit_buffer guarantees that get_buffer contains
* at least the requested number of bits --- dummy zeroes are inserted if
* necessary.
*/
typedef INT32 bit_buf_type; /* type of bit-extraction buffer */
#define BIT_BUF_SIZE 32 /* size of buffer in bits */
/* If long is > 32 bits on your machine, and shifting/masking longs is
* reasonably fast, making bit_buf_type be long and setting BIT_BUF_SIZE
* appropriately should be a win. Unfortunately we can't define the size
* with something like #define BIT_BUF_SIZE (sizeof(bit_buf_type)*8)
* because not all machines measure sizeof in 8-bit bytes.
*/
typedef struct { /* Bitreading state saved across MCUs */
bit_buf_type get_buffer; /* current bit-extraction buffer */
int bits_left; /* # of unused bits in it */
} bitread_perm_state;
typedef struct { /* Bitreading working state within an MCU */
/* Current data source location */
/* We need a copy, rather than munging the original, in case of suspension */
const JOCTET * next_input_byte; /* => next byte to read from source */
size_t bytes_in_buffer; /* # of bytes remaining in source buffer */
/* Bit input buffer --- note these values are kept in register variables,
* not in this struct, inside the inner loops.
*/
bit_buf_type get_buffer; /* current bit-extraction buffer */
int bits_left; /* # of unused bits in it */
/* Pointer needed by jpeg_fill_bit_buffer. */
j_decompress_ptr cinfo; /* back link to decompress master record */
} bitread_working_state;
/* Macros to declare and load/save bitread local variables. */
#define BITREAD_STATE_VARS \
register bit_buf_type get_buffer; \
register int bits_left; \
bitread_working_state br_state
#define BITREAD_LOAD_STATE(cinfop,permstate) \
br_state.cinfo = cinfop; \
br_state.next_input_byte = cinfop->src->next_input_byte; \
br_state.bytes_in_buffer = cinfop->src->bytes_in_buffer; \
get_buffer = permstate.get_buffer; \
bits_left = permstate.bits_left;
#define BITREAD_SAVE_STATE(cinfop,permstate) \
cinfop->src->next_input_byte = br_state.next_input_byte; \
cinfop->src->bytes_in_buffer = br_state.bytes_in_buffer; \
permstate.get_buffer = get_buffer; \
permstate.bits_left = bits_left
/*
* These macros provide the in-line portion of bit fetching.
* Use CHECK_BIT_BUFFER to ensure there are N bits in get_buffer
* before using GET_BITS, PEEK_BITS, or DROP_BITS.
* The variables get_buffer and bits_left are assumed to be locals,
* but the state struct might not be (jpeg_huff_decode needs this).
* CHECK_BIT_BUFFER(state,n,action);
* Ensure there are N bits in get_buffer; if suspend, take action.
* val = GET_BITS(n);
* Fetch next N bits.
* val = PEEK_BITS(n);
* Fetch next N bits without removing them from the buffer.
* DROP_BITS(n);
* Discard next N bits.
* The value N should be a simple variable, not an expression, because it
* is evaluated multiple times.
*/
#define CHECK_BIT_BUFFER(state,nbits,action) \
{ if (bits_left < (nbits)) { \
if (! jpeg_fill_bit_buffer(&(state),get_buffer,bits_left,nbits)) \
{ action; } \
get_buffer = (state).get_buffer; bits_left = (state).bits_left; } }
#define GET_BITS(nbits) \
(((int) (get_buffer >> (bits_left -= (nbits)))) & ((1<<(nbits))-1))
#define PEEK_BITS(nbits) \
(((int) (get_buffer >> (bits_left - (nbits)))) & ((1<<(nbits))-1))
#define DROP_BITS(nbits) \
(bits_left -= (nbits))
/* Load up the bit buffer to a depth of at least nbits */
EXTERN(boolean) jpeg_fill_bit_buffer
JPP((bitread_working_state * state, register bit_buf_type get_buffer,
register int bits_left, int nbits));
/*
* Code for extracting next Huffman-coded symbol from input bit stream.
* Again, this is time-critical and we make the main paths be macros.
*
* We use a lookahead table to process codes of up to HUFF_LOOKAHEAD bits
* without looping. Usually, more than 95% of the Huffman codes will be 8
* or fewer bits long. The few overlength codes are handled with a loop,
* which need not be inline code.
*
* Notes about the HUFF_DECODE macro:
* 1. Near the end of the data segment, we may fail to get enough bits
* for a lookahead. In that case, we do it the hard way.
* 2. If the lookahead table contains no entry, the next code must be
* more than HUFF_LOOKAHEAD bits long.
* 3. jpeg_huff_decode returns -1 if forced to suspend.
*/
#define HUFF_DECODE(result,state,htbl,failaction,slowlabel) \
{ register int nb, look; \
if (bits_left < HUFF_LOOKAHEAD) { \
if (! jpeg_fill_bit_buffer(&state,get_buffer,bits_left, 0)) {failaction;} \
get_buffer = state.get_buffer; bits_left = state.bits_left; \
if (bits_left < HUFF_LOOKAHEAD) { \
nb = 1; goto slowlabel; \
} \
} \
look = PEEK_BITS(HUFF_LOOKAHEAD); \
if ((nb = htbl->look_nbits[look]) != 0) { \
DROP_BITS(nb); \
result = htbl->look_sym[look]; \
} else { \
nb = HUFF_LOOKAHEAD+1; \
slowlabel: \
if ((result=jpeg_huff_decode(&state,get_buffer,bits_left,htbl,nb)) < 0) \
{ failaction; } \
get_buffer = state.get_buffer; bits_left = state.bits_left; \
} \
}
/* Out-of-line case for Huffman code fetching */
EXTERN(int) jpeg_huff_decode
JPP((bitread_working_state * state, register bit_buf_type get_buffer,
register int bits_left, d_derived_tbl * htbl, int min_bits));

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@ -1,291 +0,0 @@
/*
* jerror.h
*
* Copyright (C) 1994-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file defines the error and message codes for the JPEG library.
* Edit this file to add new codes, or to translate the message strings to
* some other language.
* A set of error-reporting macros are defined too. Some applications using
* the JPEG library may wish to include this file to get the error codes
* and/or the macros.
*/
/*
* To define the enum list of message codes, include this file without
* defining macro JMESSAGE. To create a message string table, include it
* again with a suitable JMESSAGE definition (see jerror.c for an example).
*/
#ifndef JMESSAGE
#ifndef JERROR_H
/* First time through, define the enum list */
#define JMAKE_ENUM_LIST
#else
/* Repeated inclusions of this file are no-ops unless JMESSAGE is defined */
#define JMESSAGE(code,string)
#endif /* JERROR_H */
#endif /* JMESSAGE */
#ifdef JMAKE_ENUM_LIST
typedef enum {
#define JMESSAGE(code,string) code ,
#endif /* JMAKE_ENUM_LIST */
JMESSAGE(JMSG_NOMESSAGE, "Bogus message code %d") /* Must be first entry! */
/* For maintenance convenience, list is alphabetical by message code name */
JMESSAGE(JERR_ARITH_NOTIMPL,
"Sorry, there are legal restrictions on arithmetic coding")
JMESSAGE(JERR_BAD_ALIGN_TYPE, "ALIGN_TYPE is wrong, please fix")
JMESSAGE(JERR_BAD_ALLOC_CHUNK, "MAX_ALLOC_CHUNK is wrong, please fix")
JMESSAGE(JERR_BAD_BUFFER_MODE, "Bogus buffer control mode")
JMESSAGE(JERR_BAD_COMPONENT_ID, "Invalid component ID %d in SOS")
JMESSAGE(JERR_BAD_DCT_COEF, "DCT coefficient out of range")
JMESSAGE(JERR_BAD_DCTSIZE, "IDCT output block size %d not supported")
JMESSAGE(JERR_BAD_HUFF_TABLE, "Bogus Huffman table definition")
JMESSAGE(JERR_BAD_IN_COLORSPACE, "Bogus input colorspace")
JMESSAGE(JERR_BAD_J_COLORSPACE, "Bogus JPEG colorspace")
JMESSAGE(JERR_BAD_LENGTH, "Bogus marker length")
JMESSAGE(JERR_BAD_LIB_VERSION,
"Wrong JPEG library version: library is %d, caller expects %d")
JMESSAGE(JERR_BAD_MCU_SIZE, "Sampling factors too large for interleaved scan")
JMESSAGE(JERR_BAD_POOL_ID, "Invalid memory pool code %d")
JMESSAGE(JERR_BAD_PRECISION, "Unsupported JPEG data precision %d")
JMESSAGE(JERR_BAD_PROGRESSION,
"Invalid progressive parameters Ss=%d Se=%d Ah=%d Al=%d")
JMESSAGE(JERR_BAD_PROG_SCRIPT,
"Invalid progressive parameters at scan script entry %d")
JMESSAGE(JERR_BAD_SAMPLING, "Bogus sampling factors")
JMESSAGE(JERR_BAD_SCAN_SCRIPT, "Invalid scan script at entry %d")
JMESSAGE(JERR_BAD_STATE, "Improper call to JPEG library in state %d")
JMESSAGE(JERR_BAD_STRUCT_SIZE,
"JPEG parameter struct mismatch: library thinks size is %u, caller expects %u")
JMESSAGE(JERR_BAD_VIRTUAL_ACCESS, "Bogus virtual array access")
JMESSAGE(JERR_BUFFER_SIZE, "Buffer passed to JPEG library is too small")
JMESSAGE(JERR_CANT_SUSPEND, "Suspension not allowed here")
JMESSAGE(JERR_CCIR601_NOTIMPL, "CCIR601 sampling not implemented yet")
JMESSAGE(JERR_COMPONENT_COUNT, "Too many color components: %d, max %d")
JMESSAGE(JERR_CONVERSION_NOTIMPL, "Unsupported color conversion request")
JMESSAGE(JERR_DAC_INDEX, "Bogus DAC index %d")
JMESSAGE(JERR_DAC_VALUE, "Bogus DAC value 0x%x")
JMESSAGE(JERR_DHT_INDEX, "Bogus DHT index %d")
JMESSAGE(JERR_DQT_INDEX, "Bogus DQT index %d")
JMESSAGE(JERR_EMPTY_IMAGE, "Empty JPEG image (DNL not supported)")
JMESSAGE(JERR_EMS_READ, "Read from EMS failed")
JMESSAGE(JERR_EMS_WRITE, "Write to EMS failed")
JMESSAGE(JERR_EOI_EXPECTED, "Didn't expect more than one scan")
JMESSAGE(JERR_FILE_READ, "Input file read error")
JMESSAGE(JERR_FILE_WRITE, "Output file write error --- out of disk space?")
JMESSAGE(JERR_FRACT_SAMPLE_NOTIMPL, "Fractional sampling not implemented yet")
JMESSAGE(JERR_HUFF_CLEN_OVERFLOW, "Huffman code size table overflow")
JMESSAGE(JERR_HUFF_MISSING_CODE, "Missing Huffman code table entry")
JMESSAGE(JERR_IMAGE_TOO_BIG, "Maximum supported image dimension is %u pixels")
JMESSAGE(JERR_INPUT_EMPTY, "Empty input file")
JMESSAGE(JERR_INPUT_EOF, "Premature end of input file")
JMESSAGE(JERR_MISMATCHED_QUANT_TABLE,
"Cannot transcode due to multiple use of quantization table %d")
JMESSAGE(JERR_MISSING_DATA, "Scan script does not transmit all data")
JMESSAGE(JERR_MODE_CHANGE, "Invalid color quantization mode change")
JMESSAGE(JERR_NOTIMPL, "Not implemented yet")
JMESSAGE(JERR_NOT_COMPILED, "Requested feature was omitted at compile time")
JMESSAGE(JERR_NO_BACKING_STORE, "Backing store not supported")
JMESSAGE(JERR_NO_HUFF_TABLE, "Huffman table 0x%02x was not defined")
JMESSAGE(JERR_NO_IMAGE, "JPEG datastream contains no image")
JMESSAGE(JERR_NO_QUANT_TABLE, "Quantization table 0x%02x was not defined")
JMESSAGE(JERR_NO_SOI, "Not a JPEG file: starts with 0x%02x 0x%02x")
JMESSAGE(JERR_OUT_OF_MEMORY, "Insufficient memory (case %d)")
JMESSAGE(JERR_QUANT_COMPONENTS,
"Cannot quantize more than %d color components")
JMESSAGE(JERR_QUANT_FEW_COLORS, "Cannot quantize to fewer than %d colors")
JMESSAGE(JERR_QUANT_MANY_COLORS, "Cannot quantize to more than %d colors")
JMESSAGE(JERR_SOF_DUPLICATE, "Invalid JPEG file structure: two SOF markers")
JMESSAGE(JERR_SOF_NO_SOS, "Invalid JPEG file structure: missing SOS marker")
JMESSAGE(JERR_SOF_UNSUPPORTED, "Unsupported JPEG process: SOF type 0x%02x")
JMESSAGE(JERR_SOI_DUPLICATE, "Invalid JPEG file structure: two SOI markers")
JMESSAGE(JERR_SOS_NO_SOF, "Invalid JPEG file structure: SOS before SOF")
JMESSAGE(JERR_TFILE_CREATE, "Failed to create temporary file %s")
JMESSAGE(JERR_TFILE_READ, "Read failed on temporary file")
JMESSAGE(JERR_TFILE_SEEK, "Seek failed on temporary file")
JMESSAGE(JERR_TFILE_WRITE,
"Write failed on temporary file --- out of disk space?")
JMESSAGE(JERR_TOO_LITTLE_DATA, "Application transferred too few scanlines")
JMESSAGE(JERR_UNKNOWN_MARKER, "Unsupported marker type 0x%02x")
JMESSAGE(JERR_VIRTUAL_BUG, "Virtual array controller messed up")
JMESSAGE(JERR_WIDTH_OVERFLOW, "Image too wide for this implementation")
JMESSAGE(JERR_XMS_READ, "Read from XMS failed")
JMESSAGE(JERR_XMS_WRITE, "Write to XMS failed")
JMESSAGE(JMSG_COPYRIGHT, JCOPYRIGHT)
JMESSAGE(JMSG_VERSION, JVERSION)
JMESSAGE(JTRC_16BIT_TABLES,
"Caution: quantization tables are too coarse for baseline JPEG")
JMESSAGE(JTRC_ADOBE,
"Adobe APP14 marker: version %d, flags 0x%04x 0x%04x, transform %d")
JMESSAGE(JTRC_APP0, "Unknown APP0 marker (not JFIF), length %u")
JMESSAGE(JTRC_APP14, "Unknown APP14 marker (not Adobe), length %u")
JMESSAGE(JTRC_DAC, "Define Arithmetic Table 0x%02x: 0x%02x")
JMESSAGE(JTRC_DHT, "Define Huffman Table 0x%02x")
JMESSAGE(JTRC_DQT, "Define Quantization Table %d precision %d")
JMESSAGE(JTRC_DRI, "Define Restart Interval %u")
JMESSAGE(JTRC_EMS_CLOSE, "Freed EMS handle %u")
JMESSAGE(JTRC_EMS_OPEN, "Obtained EMS handle %u")
JMESSAGE(JTRC_EOI, "End Of Image")
JMESSAGE(JTRC_HUFFBITS, " %3d %3d %3d %3d %3d %3d %3d %3d")
JMESSAGE(JTRC_JFIF, "JFIF APP0 marker: version %d.%02d, density %dx%d %d")
JMESSAGE(JTRC_JFIF_BADTHUMBNAILSIZE,
"Warning: thumbnail image size does not match data length %u")
JMESSAGE(JTRC_JFIF_EXTENSION,
"JFIF extension marker: type 0x%02x, length %u")
JMESSAGE(JTRC_JFIF_THUMBNAIL, " with %d x %d thumbnail image")
JMESSAGE(JTRC_MISC_MARKER, "Miscellaneous marker 0x%02x, length %u")
JMESSAGE(JTRC_PARMLESS_MARKER, "Unexpected marker 0x%02x")
JMESSAGE(JTRC_QUANTVALS, " %4u %4u %4u %4u %4u %4u %4u %4u")
JMESSAGE(JTRC_QUANT_3_NCOLORS, "Quantizing to %d = %d*%d*%d colors")
JMESSAGE(JTRC_QUANT_NCOLORS, "Quantizing to %d colors")
JMESSAGE(JTRC_QUANT_SELECTED, "Selected %d colors for quantization")
JMESSAGE(JTRC_RECOVERY_ACTION, "At marker 0x%02x, recovery action %d")
JMESSAGE(JTRC_RST, "RST%d")
JMESSAGE(JTRC_SMOOTH_NOTIMPL,
"Smoothing not supported with nonstandard sampling ratios")
JMESSAGE(JTRC_SOF, "Start Of Frame 0x%02x: width=%u, height=%u, components=%d")
JMESSAGE(JTRC_SOF_COMPONENT, " Component %d: %dhx%dv q=%d")
JMESSAGE(JTRC_SOI, "Start of Image")
JMESSAGE(JTRC_SOS, "Start Of Scan: %d components")
JMESSAGE(JTRC_SOS_COMPONENT, " Component %d: dc=%d ac=%d")
JMESSAGE(JTRC_SOS_PARAMS, " Ss=%d, Se=%d, Ah=%d, Al=%d")
JMESSAGE(JTRC_TFILE_CLOSE, "Closed temporary file %s")
JMESSAGE(JTRC_TFILE_OPEN, "Opened temporary file %s")
JMESSAGE(JTRC_THUMB_JPEG,
"JFIF extension marker: JPEG-compressed thumbnail image, length %u")
JMESSAGE(JTRC_THUMB_PALETTE,
"JFIF extension marker: palette thumbnail image, length %u")
JMESSAGE(JTRC_THUMB_RGB,
"JFIF extension marker: RGB thumbnail image, length %u")
JMESSAGE(JTRC_UNKNOWN_IDS,
"Unrecognized component IDs %d %d %d, assuming YCbCr")
JMESSAGE(JTRC_XMS_CLOSE, "Freed XMS handle %u")
JMESSAGE(JTRC_XMS_OPEN, "Obtained XMS handle %u")
JMESSAGE(JWRN_ADOBE_XFORM, "Unknown Adobe color transform code %d")
JMESSAGE(JWRN_BOGUS_PROGRESSION,
"Inconsistent progression sequence for component %d coefficient %d")
JMESSAGE(JWRN_EXTRANEOUS_DATA,
"Corrupt JPEG data: %u extraneous bytes before marker 0x%02x")
JMESSAGE(JWRN_HIT_MARKER, "Corrupt JPEG data: premature end of data segment")
JMESSAGE(JWRN_HUFF_BAD_CODE, "Corrupt JPEG data: bad Huffman code")
JMESSAGE(JWRN_JFIF_MAJOR, "Warning: unknown JFIF revision number %d.%02d")
JMESSAGE(JWRN_JPEG_EOF, "Premature end of JPEG file")
JMESSAGE(JWRN_MUST_RESYNC,
"Corrupt JPEG data: found marker 0x%02x instead of RST%d")
JMESSAGE(JWRN_NOT_SEQUENTIAL, "Invalid SOS parameters for sequential JPEG")
JMESSAGE(JWRN_TOO_MUCH_DATA, "Application transferred too many scanlines")
#ifdef JMAKE_ENUM_LIST
JMSG_LASTMSGCODE
} J_MESSAGE_CODE;
#undef JMAKE_ENUM_LIST
#endif /* JMAKE_ENUM_LIST */
/* Zap JMESSAGE macro so that future re-inclusions do nothing by default */
#undef JMESSAGE
#ifndef JERROR_H
#define JERROR_H
/* Macros to simplify using the error and trace message stuff */
/* The first parameter is either type of cinfo pointer */
/* Fatal errors (print message and exit) */
#define ERREXIT(cinfo,code) \
((cinfo)->err->msg_code = (code), \
(*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
#define ERREXIT1(cinfo,code,p1) \
((cinfo)->err->msg_code = (code), \
(cinfo)->err->msg_parm.i[0] = (p1), \
(*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
#define ERREXIT2(cinfo,code,p1,p2) \
((cinfo)->err->msg_code = (code), \
(cinfo)->err->msg_parm.i[0] = (p1), \
(cinfo)->err->msg_parm.i[1] = (p2), \
(*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
#define ERREXIT3(cinfo,code,p1,p2,p3) \
((cinfo)->err->msg_code = (code), \
(cinfo)->err->msg_parm.i[0] = (p1), \
(cinfo)->err->msg_parm.i[1] = (p2), \
(cinfo)->err->msg_parm.i[2] = (p3), \
(*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
#define ERREXIT4(cinfo,code,p1,p2,p3,p4) \
((cinfo)->err->msg_code = (code), \
(cinfo)->err->msg_parm.i[0] = (p1), \
(cinfo)->err->msg_parm.i[1] = (p2), \
(cinfo)->err->msg_parm.i[2] = (p3), \
(cinfo)->err->msg_parm.i[3] = (p4), \
(*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
#define ERREXITS(cinfo,code,str) \
((cinfo)->err->msg_code = (code), \
strncpy((cinfo)->err->msg_parm.s, (str), JMSG_STR_PARM_MAX), \
(*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
#define MAKESTMT(stuff) do { stuff } while (0)
/* Nonfatal errors (we can keep going, but the data is probably corrupt) */
#define WARNMS(cinfo,code) \
((cinfo)->err->msg_code = (code), \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
#define WARNMS1(cinfo,code,p1) \
((cinfo)->err->msg_code = (code), \
(cinfo)->err->msg_parm.i[0] = (p1), \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
#define WARNMS2(cinfo,code,p1,p2) \
((cinfo)->err->msg_code = (code), \
(cinfo)->err->msg_parm.i[0] = (p1), \
(cinfo)->err->msg_parm.i[1] = (p2), \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
/* Informational/debugging messages */
#define TRACEMS(cinfo,lvl,code) \
((cinfo)->err->msg_code = (code), \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
#define TRACEMS1(cinfo,lvl,code,p1) \
((cinfo)->err->msg_code = (code), \
(cinfo)->err->msg_parm.i[0] = (p1), \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
#define TRACEMS2(cinfo,lvl,code,p1,p2) \
((cinfo)->err->msg_code = (code), \
(cinfo)->err->msg_parm.i[0] = (p1), \
(cinfo)->err->msg_parm.i[1] = (p2), \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
#define TRACEMS3(cinfo,lvl,code,p1,p2,p3) \
MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
_mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); \
(cinfo)->err->msg_code = (code); \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
#define TRACEMS4(cinfo,lvl,code,p1,p2,p3,p4) \
MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
_mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
(cinfo)->err->msg_code = (code); \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
#define TRACEMS5(cinfo,lvl,code,p1,p2,p3,p4,p5) \
MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
_mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
_mp[4] = (p5); \
(cinfo)->err->msg_code = (code); \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
#define TRACEMS8(cinfo,lvl,code,p1,p2,p3,p4,p5,p6,p7,p8) \
MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
_mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
_mp[4] = (p5); _mp[5] = (p6); _mp[6] = (p7); _mp[7] = (p8); \
(cinfo)->err->msg_code = (code); \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
#define TRACEMSS(cinfo,lvl,code,str) \
((cinfo)->err->msg_code = (code), \
strncpy((cinfo)->err->msg_parm.s, (str), JMSG_STR_PARM_MAX), \
(*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
#endif /* JERROR_H */

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/*
* jinclude.h
*
* Copyright (C) 1991-1994, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file exists to provide a single place to fix any problems with
* including the wrong system include files. (Common problems are taken
* care of by the standard jconfig symbols, but on really weird systems
* you may have to edit this file.)
*
* NOTE: this file is NOT intended to be included by applications using the
* JPEG library. Most applications need only include jpeglib.h.
*/
/* Include auto-config file to find out which system include files we need. */
#include "jconfig.h" /* auto configuration options */
#define JCONFIG_INCLUDED /* so that jpeglib.h doesn't do it again */
/*
* We need the NULL macro and size_t typedef.
* On an ANSI-conforming system it is sufficient to include <stddef.h>.
* Otherwise, we get them from <stdlib.h> or <stdio.h>; we may have to
* pull in <sys/types.h> as well.
* Note that the core JPEG library does not require <stdio.h>;
* only the default error handler and data source/destination modules do.
* But we must pull it in because of the references to FILE in jpeglib.h.
* You can remove those references if you want to compile without <stdio.h>.
*/
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef NEED_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <stdio.h>
/*
* We need memory copying and zeroing functions, plus strncpy().
* ANSI and System V implementations declare these in <string.h>.
* BSD doesn't have the mem() functions, but it does have bcopy()/bzero().
* Some systems may declare memset and memcpy in <memory.h>.
*
* NOTE: we assume the size parameters to these functions are of type size_t.
* Change the casts in these macros if not!
*/
#ifdef NEED_BSD_STRINGS
#include <strings.h>
#define MEMZERO(target,size) bzero((void *)(target), (size_t)(size))
#define MEMCOPY(dest,src,size) bcopy((const void *)(src), (void *)(dest), (size_t)(size))
#else /* not BSD, assume ANSI/SysV string lib */
#include <string.h>
#define MEMZERO(target,size) memset((void *)(target), 0, (size_t)(size))
#define MEMCOPY(dest,src,size) memcpy((void *)(dest), (const void *)(src), (size_t)(size))
#endif
/*
* In ANSI C, and indeed any rational implementation, size_t is also the
* type returned by sizeof(). However, it seems there are some irrational
* implementations out there, in which sizeof() returns an int even though
* size_t is defined as long or unsigned long. To ensure consistent results
* we always use this SIZEOF() macro in place of using sizeof() directly.
*/
#define SIZEOF(object) ((size_t) sizeof(object))
/*
* The modules that use fread() and fwrite() always invoke them through
* these macros. On some systems you may need to twiddle the argument casts.
* CAUTION: argument order is different from underlying functions!
*/
#define JFREAD(file,buf,sizeofbuf) \
((size_t) fread((void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
#define JFWRITE(file,buf,sizeofbuf) \
((size_t) fwrite((const void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))

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/*
* jmemsys.h
*
* Copyright (C) 1992-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This include file defines the interface between the system-independent
* and system-dependent portions of the JPEG memory manager. No other
* modules need include it. (The system-independent portion is jmemmgr.c;
* there are several different versions of the system-dependent portion.)
*
* This file works as-is for the system-dependent memory managers supplied
* in the IJG distribution. You may need to modify it if you write a
* custom memory manager. If system-dependent changes are needed in
* this file, the best method is to #ifdef them based on a configuration
* symbol supplied in jconfig.h, as we have done with USE_MSDOS_MEMMGR
* and USE_MAC_MEMMGR.
*/
/* Short forms of external names for systems with brain-damaged linkers. */
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jpeg_get_small jGetSmall
#define jpeg_free_small jFreeSmall
#define jpeg_get_large jGetLarge
#define jpeg_free_large jFreeLarge
#define jpeg_mem_available jMemAvail
#define jpeg_open_backing_store jOpenBackStore
#define jpeg_mem_init jMemInit
#define jpeg_mem_term jMemTerm
#endif /* NEED_SHORT_EXTERNAL_NAMES */
/*
* These two functions are used to allocate and release small chunks of
* memory. (Typically the total amount requested through jpeg_get_small is
* no more than 20K or so; this will be requested in chunks of a few K each.)
* Behavior should be the same as for the standard library functions malloc
* and free; in particular, jpeg_get_small must return NULL on failure.
* On most systems, these ARE malloc and free. jpeg_free_small is passed the
* size of the object being freed, just in case it's needed.
* On an 80x86 machine using small-data memory model, these manage near heap.
*/
EXTERN(void *) jpeg_get_small JPP((j_common_ptr cinfo, size_t sizeofobject));
EXTERN(void) jpeg_free_small JPP((j_common_ptr cinfo, void * object,
size_t sizeofobject));
/*
* These two functions are used to allocate and release large chunks of
* memory (up to the total free space designated by jpeg_mem_available).
* The interface is the same as above, except that on an 80x86 machine,
* far pointers are used. On most other machines these are identical to
* the jpeg_get/free_small routines; but we keep them separate anyway,
* in case a different allocation strategy is desirable for large chunks.
*/
EXTERN(void FAR *) jpeg_get_large JPP((j_common_ptr cinfo,
size_t sizeofobject));
EXTERN(void) jpeg_free_large JPP((j_common_ptr cinfo, void FAR * object,
size_t sizeofobject));
/*
* The macro MAX_ALLOC_CHUNK designates the maximum number of bytes that may
* be requested in a single call to jpeg_get_large (and jpeg_get_small for that
* matter, but that case should never come into play). This macro is needed
* to model the 64Kb-segment-size limit of far addressing on 80x86 machines.
* On those machines, we expect that jconfig.h will provide a proper value.
* On machines with 32-bit flat address spaces, any large constant may be used.
*
* NB: jmemmgr.c expects that MAX_ALLOC_CHUNK will be representable as type
* size_t and will be a multiple of sizeof(align_type).
*/
#ifndef MAX_ALLOC_CHUNK /* may be overridden in jconfig.h */
#define MAX_ALLOC_CHUNK 1000000000L
#endif
/*
* This routine computes the total space still available for allocation by
* jpeg_get_large. If more space than this is needed, backing store will be
* used. NOTE: any memory already allocated must not be counted.
*
* There is a minimum space requirement, corresponding to the minimum
* feasible buffer sizes; jmemmgr.c will request that much space even if
* jpeg_mem_available returns zero. The maximum space needed, enough to hold
* all working storage in memory, is also passed in case it is useful.
* Finally, the total space already allocated is passed. If no better
* method is available, cinfo->mem->max_memory_to_use - already_allocated
* is often a suitable calculation.
*
* It is OK for jpeg_mem_available to underestimate the space available
* (that'll just lead to more backing-store access than is really necessary).
* However, an overestimate will lead to failure. Hence it's wise to subtract
* a slop factor from the true available space. 5% should be enough.
*
* On machines with lots of virtual memory, any large constant may be returned.
* Conversely, zero may be returned to always use the minimum amount of memory.
*/
EXTERN(long) jpeg_mem_available JPP((j_common_ptr cinfo,
long min_bytes_needed,
long max_bytes_needed,
long already_allocated));
/*
* This structure holds whatever state is needed to access a single
* backing-store object. The read/write/close method pointers are called
* by jmemmgr.c to manipulate the backing-store object; all other fields
* are private to the system-dependent backing store routines.
*/
#define TEMP_NAME_LENGTH 64 /* max length of a temporary file's name */
#ifdef USE_MSDOS_MEMMGR /* DOS-specific junk */
typedef unsigned short XMSH; /* type of extended-memory handles */
typedef unsigned short EMSH; /* type of expanded-memory handles */
typedef union {
short file_handle; /* DOS file handle if it's a temp file */
XMSH xms_handle; /* handle if it's a chunk of XMS */
EMSH ems_handle; /* handle if it's a chunk of EMS */
} handle_union;
#endif /* USE_MSDOS_MEMMGR */
#ifdef USE_MAC_MEMMGR /* Mac-specific junk */
#include <Files.h>
#endif /* USE_MAC_MEMMGR */
typedef struct backing_store_struct * backing_store_ptr;
typedef struct backing_store_struct {
/* Methods for reading/writing/closing this backing-store object */
JMETHOD(void, read_backing_store, (j_common_ptr cinfo,
backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count));
JMETHOD(void, write_backing_store, (j_common_ptr cinfo,
backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count));
JMETHOD(void, close_backing_store, (j_common_ptr cinfo,
backing_store_ptr info));
/* Private fields for system-dependent backing-store management */
#ifdef USE_MSDOS_MEMMGR
/* For the MS-DOS manager (jmemdos.c), we need: */
handle_union handle; /* reference to backing-store storage object */
char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */
#else
#ifdef USE_MAC_MEMMGR
/* For the Mac manager (jmemmac.c), we need: */
short temp_file; /* file reference number to temp file */
FSSpec tempSpec; /* the FSSpec for the temp file */
char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */
#else
/* For a typical implementation with temp files, we need: */
FILE * temp_file; /* stdio reference to temp file */
char temp_name[TEMP_NAME_LENGTH]; /* name of temp file */
#endif
#endif
} backing_store_info;
/*
* Initial opening of a backing-store object. This must fill in the
* read/write/close pointers in the object. The read/write routines
* may take an error exit if the specified maximum file size is exceeded.
* (If jpeg_mem_available always returns a large value, this routine can
* just take an error exit.)
*/
EXTERN(void) jpeg_open_backing_store JPP((j_common_ptr cinfo,
backing_store_ptr info,
long total_bytes_needed));
/*
* These routines take care of any system-dependent initialization and
* cleanup required. jpeg_mem_init will be called before anything is
* allocated (and, therefore, nothing in cinfo is of use except the error
* manager pointer). It should return a suitable default value for
* max_memory_to_use; this may subsequently be overridden by the surrounding
* application. (Note that max_memory_to_use is only important if
* jpeg_mem_available chooses to consult it ... no one else will.)
* jpeg_mem_term may assume that all requested memory has been freed and that
* all opened backing-store objects have been closed.
*/
EXTERN(long) jpeg_mem_init JPP((j_common_ptr cinfo));
EXTERN(void) jpeg_mem_term JPP((j_common_ptr cinfo));

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/*
* jmorecfg.h
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains additional configuration options that customize the
* JPEG software for special applications or support machine-dependent
* optimizations. Most users will not need to touch this file.
*/
/*
* Define BITS_IN_JSAMPLE as either
* 8 for 8-bit sample values (the usual setting)
* 12 for 12-bit sample values
* Only 8 and 12 are legal data precisions for lossy JPEG according to the
* JPEG standard, and the IJG code does not support anything else!
* We do not support run-time selection of data precision, sorry.
*/
#define BITS_IN_JSAMPLE 8 /* use 8 or 12 */
/*
* Maximum number of components (color channels) allowed in JPEG image.
* To meet the letter of the JPEG spec, set this to 255. However, darn
* few applications need more than 4 channels (maybe 5 for CMYK + alpha
* mask). We recommend 10 as a reasonable compromise; use 4 if you are
* really short on memory. (Each allowed component costs a hundred or so
* bytes of storage, whether actually used in an image or not.)
*/
#define MAX_COMPONENTS 10 /* maximum number of image components */
/*
* Basic data types.
* You may need to change these if you have a machine with unusual data
* type sizes; for example, "char" not 8 bits, "short" not 16 bits,
* or "long" not 32 bits. We don't care whether "int" is 16 or 32 bits,
* but it had better be at least 16.
*/
/* Representation of a single sample (pixel element value).
* We frequently allocate large arrays of these, so it's important to keep
* them small. But if you have memory to burn and access to char or short
* arrays is very slow on your hardware, you might want to change these.
*/
#if BITS_IN_JSAMPLE == 8
/* JSAMPLE should be the smallest type that will hold the values 0..255.
* You can use a signed char by having GETJSAMPLE mask it with 0xFF.
*/
#ifdef HAVE_UNSIGNED_CHAR
typedef unsigned char JSAMPLE;
#define GETJSAMPLE(value) ((int) (value))
#else /* not HAVE_UNSIGNED_CHAR */
typedef char JSAMPLE;
#ifdef CHAR_IS_UNSIGNED
#define GETJSAMPLE(value) ((int) (value))
#else
#define GETJSAMPLE(value) ((int) (value) & 0xFF)
#endif /* CHAR_IS_UNSIGNED */
#endif /* HAVE_UNSIGNED_CHAR */
#define MAXJSAMPLE 255
#define CENTERJSAMPLE 128
#endif /* BITS_IN_JSAMPLE == 8 */
#if BITS_IN_JSAMPLE == 12
/* JSAMPLE should be the smallest type that will hold the values 0..4095.
* On nearly all machines "short" will do nicely.
*/
typedef short JSAMPLE;
#define GETJSAMPLE(value) ((int) (value))
#define MAXJSAMPLE 4095
#define CENTERJSAMPLE 2048
#endif /* BITS_IN_JSAMPLE == 12 */
/* Representation of a DCT frequency coefficient.
* This should be a signed value of at least 16 bits; "short" is usually OK.
* Again, we allocate large arrays of these, but you can change to int
* if you have memory to burn and "short" is really slow.
*/
typedef short JCOEF;
/* Compressed datastreams are represented as arrays of JOCTET.
* These must be EXACTLY 8 bits wide, at least once they are written to
* external storage. Note that when using the stdio data source/destination
* managers, this is also the data type passed to fread/fwrite.
*/
#ifdef HAVE_UNSIGNED_CHAR
typedef unsigned char JOCTET;
#define GETJOCTET(value) (value)
#else /* not HAVE_UNSIGNED_CHAR */
typedef char JOCTET;
#ifdef CHAR_IS_UNSIGNED
#define GETJOCTET(value) (value)
#else
#define GETJOCTET(value) ((value) & 0xFF)
#endif /* CHAR_IS_UNSIGNED */
#endif /* HAVE_UNSIGNED_CHAR */
/* These typedefs are used for various table entries and so forth.
* They must be at least as wide as specified; but making them too big
* won't cost a huge amount of memory, so we don't provide special
* extraction code like we did for JSAMPLE. (In other words, these
* typedefs live at a different point on the speed/space tradeoff curve.)
*/
/* UINT8 must hold at least the values 0..255. */
#ifdef HAVE_UNSIGNED_CHAR
typedef unsigned char UINT8;
#else /* not HAVE_UNSIGNED_CHAR */
#ifdef CHAR_IS_UNSIGNED
typedef char UINT8;
#else /* not CHAR_IS_UNSIGNED */
typedef short UINT8;
#endif /* CHAR_IS_UNSIGNED */
#endif /* HAVE_UNSIGNED_CHAR */
/* UINT16 must hold at least the values 0..65535. */
#ifdef HAVE_UNSIGNED_SHORT
typedef unsigned short UINT16;
#else /* not HAVE_UNSIGNED_SHORT */
typedef unsigned int UINT16;
#endif /* HAVE_UNSIGNED_SHORT */
/* INT16 must hold at least the values -32768..32767. */
#ifndef XMD_H /* X11/xmd.h correctly defines INT16 */
typedef short INT16;
#endif
/* INT32 must hold at least signed 32-bit values. */
#ifndef XMD_H /* X11/xmd.h correctly defines INT32 */
typedef long INT32;
#endif
/* Datatype used for image dimensions. The JPEG standard only supports
* images up to 64K*64K due to 16-bit fields in SOF markers. Therefore
* "unsigned int" is sufficient on all machines. However, if you need to
* handle larger images and you don't mind deviating from the spec, you
* can change this datatype.
*/
typedef unsigned int JDIMENSION;
#define JPEG_MAX_DIMENSION 65500L /* a tad under 64K to prevent overflows */
/* These macros are used in all function definitions and extern declarations.
* You could modify them if you need to change function linkage conventions;
* in particular, you'll need to do that to make the library a Windows DLL.
* Another application is to make all functions global for use with debuggers
* or code profilers that require it.
*/
/* a function called through method pointers: */
#define METHODDEF(type) static type
/* a function used only in its module: */
#define LOCAL(type) static type
/* a function referenced thru EXTERNs: */
#define GLOBAL(type) type
/* a reference to a GLOBAL function: */
#define EXTERN(type) extern type
/* This macro is used to declare a "method", that is, a function pointer.
* We want to supply prototype parameters if the compiler can cope.
* Note that the arglist parameter must be parenthesized!
* Again, you can customize this if you need special linkage keywords.
*/
#ifdef HAVE_PROTOTYPES
#define JMETHOD(type,methodname,arglist) type (*methodname) arglist
#else
#define JMETHOD(type,methodname,arglist) type (*methodname) ()
#endif
/* Here is the pseudo-keyword for declaring pointers that must be "far"
* on 80x86 machines. Most of the specialized coding for 80x86 is handled
* by just saying "FAR *" where such a pointer is needed. In a few places
* explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.
*/
#ifdef NEED_FAR_POINTERS
#define FAR far
#else
#define FAR
#endif
/*
* On a few systems, type boolean and/or its values FALSE, TRUE may appear
* in standard header files. Or you may have conflicts with application-
* specific header files that you want to include together with these files.
* Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
*/
#ifndef HAVE_BOOLEAN
typedef int boolean;
#endif
#ifndef FALSE /* in case these macros already exist */
#define FALSE 0 /* values of boolean */
#endif
#ifndef TRUE
#define TRUE 1
#endif
/*
* The remaining options affect code selection within the JPEG library,
* but they don't need to be visible to most applications using the library.
* To minimize application namespace pollution, the symbols won't be
* defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
*/
#ifdef JPEG_INTERNALS
#define JPEG_INTERNAL_OPTIONS
#endif
#ifdef JPEG_INTERNAL_OPTIONS
/*
* These defines indicate whether to include various optional functions.
* Undefining some of these symbols will produce a smaller but less capable
* library. Note that you can leave certain source files out of the
* compilation/linking process if you've #undef'd the corresponding symbols.
* (You may HAVE to do that if your compiler doesn't like null source files.)
*/
/* Arithmetic coding is unsupported for legal reasons. Complaints to IBM. */
/* Capability options common to encoder and decoder: */
#define DCT_ISLOW_SUPPORTED /* slow but accurate integer algorithm */
#define DCT_IFAST_SUPPORTED /* faster, less accurate integer method */
#define DCT_FLOAT_SUPPORTED /* floating-point: accurate, fast on fast HW */
/* Encoder capability options: */
#undef C_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */
#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
#define C_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/
#define ENTROPY_OPT_SUPPORTED /* Optimization of entropy coding parms? */
/* Note: if you selected 12-bit data precision, it is dangerous to turn off
* ENTROPY_OPT_SUPPORTED. The standard Huffman tables are only good for 8-bit
* precision, so jchuff.c normally uses entropy optimization to compute
* usable tables for higher precision. If you don't want to do optimization,
* you'll have to supply different default Huffman tables.
* The exact same statements apply for progressive JPEG: the default tables
* don't work for progressive mode. (This may get fixed, however.)
*/
#define INPUT_SMOOTHING_SUPPORTED /* Input image smoothing option? */
/* Decoder capability options: */
#undef D_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */
#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
#define D_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/
#define SAVE_MARKERS_SUPPORTED /* jpeg_save_markers() needed? */
#define BLOCK_SMOOTHING_SUPPORTED /* Block smoothing? (Progressive only) */
#define IDCT_SCALING_SUPPORTED /* Output rescaling via IDCT? */
#undef UPSAMPLE_SCALING_SUPPORTED /* Output rescaling at upsample stage? */
#define UPSAMPLE_MERGING_SUPPORTED /* Fast path for sloppy upsampling? */
#define QUANT_1PASS_SUPPORTED /* 1-pass color quantization? */
#define QUANT_2PASS_SUPPORTED /* 2-pass color quantization? */
/* more capability options later, no doubt */
/*
* Ordering of RGB data in scanlines passed to or from the application.
* If your application wants to deal with data in the order B,G,R, just
* change these macros. You can also deal with formats such as R,G,B,X
* (one extra byte per pixel) by changing RGB_PIXELSIZE. Note that changing
* the offsets will also change the order in which colormap data is organized.
* RESTRICTIONS:
* 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.
* 2. These macros only affect RGB<=>YCbCr color conversion, so they are not
* useful if you are using JPEG color spaces other than YCbCr or grayscale.
* 3. The color quantizer modules will not behave desirably if RGB_PIXELSIZE
* is not 3 (they don't understand about dummy color components!). So you
* can't use color quantization if you change that value.
*/
#define RGB_RED 0 /* Offset of Red in an RGB scanline element */
#define RGB_GREEN 1 /* Offset of Green */
#define RGB_BLUE 2 /* Offset of Blue */
#define RGB_PIXELSIZE 3 /* JSAMPLEs per RGB scanline element */
/* Definitions for speed-related optimizations. */
/* If your compiler supports inline functions, define INLINE
* as the inline keyword; otherwise define it as empty.
*/
#ifndef INLINE
#ifdef __GNUC__ /* for instance, GNU C knows about inline */
#define INLINE __inline__
#endif
#ifndef INLINE
#define INLINE /* default is to define it as empty */
#endif
#endif
/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
* two 16-bit shorts is faster than multiplying two ints. Define MULTIPLIER
* as short on such a machine. MULTIPLIER must be at least 16 bits wide.
*/
#ifndef MULTIPLIER
#define MULTIPLIER int /* type for fastest integer multiply */
#endif
/* FAST_FLOAT should be either float or double, whichever is done faster
* by your compiler. (Note that this type is only used in the floating point
* DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
* Typically, float is faster in ANSI C compilers, while double is faster in
* pre-ANSI compilers (because they insist on converting to double anyway).
* The code below therefore chooses float if we have ANSI-style prototypes.
*/
#ifndef FAST_FLOAT
#ifdef HAVE_PROTOTYPES
#define FAST_FLOAT float
#else
#define FAST_FLOAT double
#endif
#endif
#endif /* JPEG_INTERNAL_OPTIONS */

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/*
* jpegint.h
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file provides common declarations for the various JPEG modules.
* These declarations are considered internal to the JPEG library; most
* applications using the library shouldn't need to include this file.
*/
/* Declarations for both compression & decompression */
typedef enum { /* Operating modes for buffer controllers */
JBUF_PASS_THRU, /* Plain stripwise operation */
/* Remaining modes require a full-image buffer to have been created */
JBUF_SAVE_SOURCE, /* Run source subobject only, save output */
JBUF_CRANK_DEST, /* Run dest subobject only, using saved data */
JBUF_SAVE_AND_PASS /* Run both subobjects, save output */
} J_BUF_MODE;
/* Values of global_state field (jdapi.c has some dependencies on ordering!) */
#define CSTATE_START 100 /* after create_compress */
#define CSTATE_SCANNING 101 /* start_compress done, write_scanlines OK */
#define CSTATE_RAW_OK 102 /* start_compress done, write_raw_data OK */
#define CSTATE_WRCOEFS 103 /* jpeg_write_coefficients done */
#define DSTATE_START 200 /* after create_decompress */
#define DSTATE_INHEADER 201 /* reading header markers, no SOS yet */
#define DSTATE_READY 202 /* found SOS, ready for start_decompress */
#define DSTATE_PRELOAD 203 /* reading multiscan file in start_decompress*/
#define DSTATE_PRESCAN 204 /* performing dummy pass for 2-pass quant */
#define DSTATE_SCANNING 205 /* start_decompress done, read_scanlines OK */
#define DSTATE_RAW_OK 206 /* start_decompress done, read_raw_data OK */
#define DSTATE_BUFIMAGE 207 /* expecting jpeg_start_output */
#define DSTATE_BUFPOST 208 /* looking for SOS/EOI in jpeg_finish_output */
#define DSTATE_RDCOEFS 209 /* reading file in jpeg_read_coefficients */
#define DSTATE_STOPPING 210 /* looking for EOI in jpeg_finish_decompress */
/* Declarations for compression modules */
/* Master control module */
struct jpeg_comp_master {
JMETHOD(void, prepare_for_pass, (j_compress_ptr cinfo));
JMETHOD(void, pass_startup, (j_compress_ptr cinfo));
JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
/* State variables made visible to other modules */
boolean call_pass_startup; /* True if pass_startup must be called */
boolean is_last_pass; /* True during last pass */
};
/* Main buffer control (downsampled-data buffer) */
struct jpeg_c_main_controller {
JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
JMETHOD(void, process_data, (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
JDIMENSION in_rows_avail));
};
/* Compression preprocessing (downsampling input buffer control) */
struct jpeg_c_prep_controller {
JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
JMETHOD(void, pre_process_data, (j_compress_ptr cinfo,
JSAMPARRAY input_buf,
JDIMENSION *in_row_ctr,
JDIMENSION in_rows_avail,
JSAMPIMAGE output_buf,
JDIMENSION *out_row_group_ctr,
JDIMENSION out_row_groups_avail));
};
/* Coefficient buffer control */
struct jpeg_c_coef_controller {
JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
JMETHOD(boolean, compress_data, (j_compress_ptr cinfo,
JSAMPIMAGE input_buf));
};
/* Colorspace conversion */
struct jpeg_color_converter {
JMETHOD(void, start_pass, (j_compress_ptr cinfo));
JMETHOD(void, color_convert, (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows));
};
/* Downsampling */
struct jpeg_downsampler {
JMETHOD(void, start_pass, (j_compress_ptr cinfo));
JMETHOD(void, downsample, (j_compress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION in_row_index,
JSAMPIMAGE output_buf,
JDIMENSION out_row_group_index));
boolean need_context_rows; /* TRUE if need rows above & below */
};
/* Forward DCT (also controls coefficient quantization) */
struct jpeg_forward_dct {
JMETHOD(void, start_pass, (j_compress_ptr cinfo));
/* perhaps this should be an array??? */
JMETHOD(void, forward_DCT, (j_compress_ptr cinfo,
jpeg_component_info * compptr,
JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
JDIMENSION start_row, JDIMENSION start_col,
JDIMENSION num_blocks));
};
/* Entropy encoding */
struct jpeg_entropy_encoder {
JMETHOD(void, start_pass, (j_compress_ptr cinfo, boolean gather_statistics));
JMETHOD(boolean, encode_mcu, (j_compress_ptr cinfo, JBLOCKROW *MCU_data));
JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
};
/* Marker writing */
struct jpeg_marker_writer {
JMETHOD(void, write_file_header, (j_compress_ptr cinfo));
JMETHOD(void, write_frame_header, (j_compress_ptr cinfo));
JMETHOD(void, write_scan_header, (j_compress_ptr cinfo));
JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo));
JMETHOD(void, write_tables_only, (j_compress_ptr cinfo));
/* These routines are exported to allow insertion of extra markers */
/* Probably only COM and APPn markers should be written this way */
JMETHOD(void, write_marker_header, (j_compress_ptr cinfo, int marker,
unsigned int datalen));
JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val));
};
/* Declarations for decompression modules */
/* Master control module */
struct jpeg_decomp_master {
JMETHOD(void, prepare_for_output_pass, (j_decompress_ptr cinfo));
JMETHOD(void, finish_output_pass, (j_decompress_ptr cinfo));
/* State variables made visible to other modules */
boolean is_dummy_pass; /* True during 1st pass for 2-pass quant */
};
/* Input control module */
struct jpeg_input_controller {
JMETHOD(int, consume_input, (j_decompress_ptr cinfo));
JMETHOD(void, reset_input_controller, (j_decompress_ptr cinfo));
JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
JMETHOD(void, finish_input_pass, (j_decompress_ptr cinfo));
/* State variables made visible to other modules */
boolean has_multiple_scans; /* True if file has multiple scans */
boolean eoi_reached; /* True when EOI has been consumed */
};
/* Main buffer control (downsampled-data buffer) */
struct jpeg_d_main_controller {
JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
JMETHOD(void, process_data, (j_decompress_ptr cinfo,
JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
JDIMENSION out_rows_avail));
};
/* Coefficient buffer control */
struct jpeg_d_coef_controller {
JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
JMETHOD(int, consume_data, (j_decompress_ptr cinfo));
JMETHOD(void, start_output_pass, (j_decompress_ptr cinfo));
JMETHOD(int, decompress_data, (j_decompress_ptr cinfo,
JSAMPIMAGE output_buf));
/* Pointer to array of coefficient virtual arrays, or NULL if none */
jvirt_barray_ptr *coef_arrays;
};
/* Decompression postprocessing (color quantization buffer control) */
struct jpeg_d_post_controller {
JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
JMETHOD(void, post_process_data, (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf,
JDIMENSION *in_row_group_ctr,
JDIMENSION in_row_groups_avail,
JSAMPARRAY output_buf,
JDIMENSION *out_row_ctr,
JDIMENSION out_rows_avail));
};
/* Marker reading & parsing */
struct jpeg_marker_reader {
JMETHOD(void, reset_marker_reader, (j_decompress_ptr cinfo));
/* Read markers until SOS or EOI.
* Returns same codes as are defined for jpeg_consume_input:
* JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
*/
JMETHOD(int, read_markers, (j_decompress_ptr cinfo));
/* Read a restart marker --- exported for use by entropy decoder only */
jpeg_marker_parser_method read_restart_marker;
/* State of marker reader --- nominally internal, but applications
* supplying COM or APPn handlers might like to know the state.
*/
boolean saw_SOI; /* found SOI? */
boolean saw_SOF; /* found SOF? */
int next_restart_num; /* next restart number expected (0-7) */
unsigned int discarded_bytes; /* # of bytes skipped looking for a marker */
};
/* Entropy decoding */
struct jpeg_entropy_decoder {
JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
JMETHOD(boolean, decode_mcu, (j_decompress_ptr cinfo,
JBLOCKROW *MCU_data));
/* This is here to share code between baseline and progressive decoders; */
/* other modules probably should not use it */
boolean insufficient_data; /* set TRUE after emitting warning */
};
/* Inverse DCT (also performs dequantization) */
typedef JMETHOD(void, inverse_DCT_method_ptr,
(j_decompress_ptr cinfo, jpeg_component_info * compptr,
JCOEFPTR coef_block,
JSAMPARRAY output_buf, JDIMENSION output_col));
struct jpeg_inverse_dct {
JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
/* It is useful to allow each component to have a separate IDCT method. */
inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];
};
/* Upsampling (note that upsampler must also call color converter) */
struct jpeg_upsampler {
JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
JMETHOD(void, upsample, (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf,
JDIMENSION *in_row_group_ctr,
JDIMENSION in_row_groups_avail,
JSAMPARRAY output_buf,
JDIMENSION *out_row_ctr,
JDIMENSION out_rows_avail));
boolean need_context_rows; /* TRUE if need rows above & below */
};
/* Colorspace conversion */
struct jpeg_color_deconverter {
JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
JMETHOD(void, color_convert, (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION input_row,
JSAMPARRAY output_buf, int num_rows));
};
/* Color quantization or color precision reduction */
struct jpeg_color_quantizer {
JMETHOD(void, start_pass, (j_decompress_ptr cinfo, boolean is_pre_scan));
JMETHOD(void, color_quantize, (j_decompress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPARRAY output_buf,
int num_rows));
JMETHOD(void, finish_pass, (j_decompress_ptr cinfo));
JMETHOD(void, new_color_map, (j_decompress_ptr cinfo));
};
/* Miscellaneous useful macros */
#undef MAX
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#undef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
/* We assume that right shift corresponds to signed division by 2 with
* rounding towards minus infinity. This is correct for typical "arithmetic
* shift" instructions that shift in copies of the sign bit. But some
* C compilers implement >> with an unsigned shift. For these machines you
* must define RIGHT_SHIFT_IS_UNSIGNED.
* RIGHT_SHIFT provides a proper signed right shift of an INT32 quantity.
* It is only applied with constant shift counts. SHIFT_TEMPS must be
* included in the variables of any routine using RIGHT_SHIFT.
*/
#ifdef RIGHT_SHIFT_IS_UNSIGNED
#define SHIFT_TEMPS INT32 shift_temp;
#define RIGHT_SHIFT(x,shft) \
((shift_temp = (x)) < 0 ? \
(shift_temp >> (shft)) | ((~((INT32) 0)) << (32-(shft))) : \
(shift_temp >> (shft)))
#else
#define SHIFT_TEMPS
#define RIGHT_SHIFT(x,shft) ((x) >> (shft))
#endif
/* Short forms of external names for systems with brain-damaged linkers. */
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jinit_compress_master jICompress
#define jinit_c_master_control jICMaster
#define jinit_c_main_controller jICMainC
#define jinit_c_prep_controller jICPrepC
#define jinit_c_coef_controller jICCoefC
#define jinit_color_converter jICColor
#define jinit_downsampler jIDownsampler
#define jinit_forward_dct jIFDCT
#define jinit_huff_encoder jIHEncoder
#define jinit_phuff_encoder jIPHEncoder
#define jinit_marker_writer jIMWriter
#define jinit_master_decompress jIDMaster
#define jinit_d_main_controller jIDMainC
#define jinit_d_coef_controller jIDCoefC
#define jinit_d_post_controller jIDPostC
#define jinit_input_controller jIInCtlr
#define jinit_marker_reader jIMReader
#define jinit_huff_decoder jIHDecoder
#define jinit_phuff_decoder jIPHDecoder
#define jinit_inverse_dct jIIDCT
#define jinit_upsampler jIUpsampler
#define jinit_color_deconverter jIDColor
#define jinit_1pass_quantizer jI1Quant
#define jinit_2pass_quantizer jI2Quant
#define jinit_merged_upsampler jIMUpsampler
#define jinit_memory_mgr jIMemMgr
#define jdiv_round_up jDivRound
#define jround_up jRound
#define jcopy_sample_rows jCopySamples
#define jcopy_block_row jCopyBlocks
#define jzero_far jZeroFar
#define jpeg_zigzag_order jZIGTable
#define jpeg_natural_order jZAGTable
#endif /* NEED_SHORT_EXTERNAL_NAMES */
/* Compression module initialization routines */
EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo));
EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo,
boolean transcode_only));
EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo,
boolean need_full_buffer));
EXTERN(void) jinit_c_prep_controller JPP((j_compress_ptr cinfo,
boolean need_full_buffer));
EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo,
boolean need_full_buffer));
EXTERN(void) jinit_color_converter JPP((j_compress_ptr cinfo));
EXTERN(void) jinit_downsampler JPP((j_compress_ptr cinfo));
EXTERN(void) jinit_forward_dct JPP((j_compress_ptr cinfo));
EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo));
EXTERN(void) jinit_phuff_encoder JPP((j_compress_ptr cinfo));
EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo));
/* Decompression module initialization routines */
EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo,
boolean need_full_buffer));
EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo,
boolean need_full_buffer));
EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo,
boolean need_full_buffer));
EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_marker_reader JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_phuff_decoder JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_upsampler JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_color_deconverter JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_1pass_quantizer JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_2pass_quantizer JPP((j_decompress_ptr cinfo));
EXTERN(void) jinit_merged_upsampler JPP((j_decompress_ptr cinfo));
/* Memory manager initialization */
EXTERN(void) jinit_memory_mgr JPP((j_common_ptr cinfo));
/* Utility routines in jutils.c */
EXTERN(long) jdiv_round_up JPP((long a, long b));
EXTERN(long) jround_up JPP((long a, long b));
EXTERN(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row,
JSAMPARRAY output_array, int dest_row,
int num_rows, JDIMENSION num_cols));
EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row,
JDIMENSION num_blocks));
EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero));
/* Constant tables in jutils.c */
#if 0 /* This table is not actually needed in v6a */
extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
#endif
extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */
/* Suppress undefined-structure complaints if necessary. */
#ifdef INCOMPLETE_TYPES_BROKEN
#ifndef AM_MEMORY_MANAGER /* only jmemmgr.c defines these */
struct jvirt_sarray_control { long dummy; };
struct jvirt_barray_control { long dummy; };
#endif
#endif /* INCOMPLETE_TYPES_BROKEN */

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/*
* jversion.h
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains software version identification.
*/
#define JVERSION "6b 27-Mar-1998"
#define JCOPYRIGHT "Copyright (C) 1998, Thomas G. Lane"

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/*
* transupp.h
*
* Copyright (C) 1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains declarations for image transformation routines and
* other utility code used by the jpegtran sample application. These are
* NOT part of the core JPEG library. But we keep these routines separate
* from jpegtran.c to ease the task of maintaining jpegtran-like programs
* that have other user interfaces.
*
* NOTE: all the routines declared here have very specific requirements
* about when they are to be executed during the reading and writing of the
* source and destination files. See the comments in transupp.c, or see
* jpegtran.c for an example of correct usage.
*/
/* If you happen not to want the image transform support, disable it here */
#ifndef TRANSFORMS_SUPPORTED
#define TRANSFORMS_SUPPORTED 1 /* 0 disables transform code */
#endif
/* Short forms of external names for systems with brain-damaged linkers. */
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jtransform_request_workspace jTrRequest
#define jtransform_adjust_parameters jTrAdjust
#define jtransform_execute_transformation jTrExec
#define jcopy_markers_setup jCMrkSetup
#define jcopy_markers_execute jCMrkExec
#endif /* NEED_SHORT_EXTERNAL_NAMES */
/*
* Codes for supported types of image transformations.
*/
typedef enum {
JXFORM_NONE, /* no transformation */
JXFORM_FLIP_H, /* horizontal flip */
JXFORM_FLIP_V, /* vertical flip */
JXFORM_TRANSPOSE, /* transpose across UL-to-LR axis */
JXFORM_TRANSVERSE, /* transpose across UR-to-LL axis */
JXFORM_ROT_90, /* 90-degree clockwise rotation */
JXFORM_ROT_180, /* 180-degree rotation */
JXFORM_ROT_270 /* 270-degree clockwise (or 90 ccw) */
} JXFORM_CODE;
/*
* Although rotating and flipping data expressed as DCT coefficients is not
* hard, there is an asymmetry in the JPEG format specification for images
* whose dimensions aren't multiples of the iMCU size. The right and bottom
* image edges are padded out to the next iMCU boundary with junk data; but
* no padding is possible at the top and left edges. If we were to flip
* the whole image including the pad data, then pad garbage would become
* visible at the top and/or left, and real pixels would disappear into the
* pad margins --- perhaps permanently, since encoders & decoders may not
* bother to preserve DCT blocks that appear to be completely outside the
* nominal image area. So, we have to exclude any partial iMCUs from the
* basic transformation.
*
* Transpose is the only transformation that can handle partial iMCUs at the
* right and bottom edges completely cleanly. flip_h can flip partial iMCUs
* at the bottom, but leaves any partial iMCUs at the right edge untouched.
* Similarly flip_v leaves any partial iMCUs at the bottom edge untouched.
* The other transforms are defined as combinations of these basic transforms
* and process edge blocks in a way that preserves the equivalence.
*
* The "trim" option causes untransformable partial iMCUs to be dropped;
* this is not strictly lossless, but it usually gives the best-looking
* result for odd-size images. Note that when this option is active,
* the expected mathematical equivalences between the transforms may not hold.
* (For example, -rot 270 -trim trims only the bottom edge, but -rot 90 -trim
* followed by -rot 180 -trim trims both edges.)
*
* We also offer a "force to grayscale" option, which simply discards the
* chrominance channels of a YCbCr image. This is lossless in the sense that
* the luminance channel is preserved exactly. It's not the same kind of
* thing as the rotate/flip transformations, but it's convenient to handle it
* as part of this package, mainly because the transformation routines have to
* be aware of the option to know how many components to work on.
*/
typedef struct {
/* Options: set by caller */
JXFORM_CODE transform; /* image transform operator */
boolean trim; /* if TRUE, trim partial MCUs as needed */
boolean force_grayscale; /* if TRUE, convert color image to grayscale */
/* Internal workspace: caller should not touch these */
int num_components; /* # of components in workspace */
jvirt_barray_ptr * workspace_coef_arrays; /* workspace for transformations */
} jpeg_transform_info;
#if TRANSFORMS_SUPPORTED
/* Request any required workspace */
EXTERN(void) jtransform_request_workspace
JPP((j_decompress_ptr srcinfo, jpeg_transform_info *info));
/* Adjust output image parameters */
EXTERN(jvirt_barray_ptr *) jtransform_adjust_parameters
JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
jvirt_barray_ptr *src_coef_arrays,
jpeg_transform_info *info));
/* Execute the actual transformation, if any */
EXTERN(void) jtransform_execute_transformation
JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
jvirt_barray_ptr *src_coef_arrays,
jpeg_transform_info *info));
#endif /* TRANSFORMS_SUPPORTED */
/*
* Support for copying optional markers from source to destination file.
*/
typedef enum {
JCOPYOPT_NONE, /* copy no optional markers */
JCOPYOPT_COMMENTS, /* copy only comment (COM) markers */
JCOPYOPT_ALL /* copy all optional markers */
} JCOPY_OPTION;
#define JCOPYOPT_DEFAULT JCOPYOPT_COMMENTS /* recommended default */
/* Setup decompression object to save desired markers in memory */
EXTERN(void) jcopy_markers_setup
JPP((j_decompress_ptr srcinfo, JCOPY_OPTION option));
/* Copy markers saved in the given source object to the destination object */
EXTERN(void) jcopy_markers_execute
JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
JCOPY_OPTION option));

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/* Public Domain Curses */
/* $Id: panel.h,v 1.19 2008/07/13 16:08:16 wmcbrine Exp $ */
/*----------------------------------------------------------------------*
* Panels for PDCurses *
*----------------------------------------------------------------------*/

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/* Public Domain Curses */
/* $Id: term.h,v 1.16 2008/07/13 16:08:16 wmcbrine Exp $ */
/* PDCurses doesn't operate with terminfo, but we need these functions for
compatibility, to allow some things (notably, interface libraries for
other languages) to be compiled. Anyone who tries to actually _use_

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/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
/* This file is included! */
#ifdef XML_TOK_NS_C
const ENCODING *
NS(XmlGetUtf8InternalEncoding)(void)
{
return &ns(internal_utf8_encoding).enc;
}
const ENCODING *
NS(XmlGetUtf16InternalEncoding)(void)
{
#if BYTEORDER == 1234
return &ns(internal_little2_encoding).enc;
#elif BYTEORDER == 4321
return &ns(internal_big2_encoding).enc;
#else
const short n = 1;
return (*(const char *)&n
? &ns(internal_little2_encoding).enc
: &ns(internal_big2_encoding).enc);
#endif
}
static const ENCODING * const NS(encodings)[] = {
&ns(latin1_encoding).enc,
&ns(ascii_encoding).enc,
&ns(utf8_encoding).enc,
&ns(big2_encoding).enc,
&ns(big2_encoding).enc,
&ns(little2_encoding).enc,
&ns(utf8_encoding).enc /* NO_ENC */
};
static int PTRCALL
NS(initScanProlog)(const ENCODING *enc, const char *ptr, const char *end,
const char **nextTokPtr)
{
return initScan(NS(encodings), (const INIT_ENCODING *)enc,
XML_PROLOG_STATE, ptr, end, nextTokPtr);
}
static int PTRCALL
NS(initScanContent)(const ENCODING *enc, const char *ptr, const char *end,
const char **nextTokPtr)
{
return initScan(NS(encodings), (const INIT_ENCODING *)enc,
XML_CONTENT_STATE, ptr, end, nextTokPtr);
}
int
NS(XmlInitEncoding)(INIT_ENCODING *p, const ENCODING **encPtr,
const char *name)
{
int i = getEncodingIndex(name);
if (i == UNKNOWN_ENC)
return 0;
SET_INIT_ENC_INDEX(p, i);
p->initEnc.scanners[XML_PROLOG_STATE] = NS(initScanProlog);
p->initEnc.scanners[XML_CONTENT_STATE] = NS(initScanContent);
p->initEnc.updatePosition = initUpdatePosition;
p->encPtr = encPtr;
*encPtr = &(p->initEnc);
return 1;
}
static const ENCODING *
NS(findEncoding)(const ENCODING *enc, const char *ptr, const char *end)
{
#define ENCODING_MAX 128
char buf[ENCODING_MAX];
char *p = buf;
int i;
XmlUtf8Convert(enc, &ptr, end, &p, p + ENCODING_MAX - 1);
if (ptr != end)
return 0;
*p = 0;
if (streqci(buf, KW_UTF_16) && enc->minBytesPerChar == 2)
return enc;
i = getEncodingIndex(buf);
if (i == UNKNOWN_ENC)
return 0;
return NS(encodings)[i];
}
int
NS(XmlParseXmlDecl)(int isGeneralTextEntity,
const ENCODING *enc,
const char *ptr,
const char *end,
const char **badPtr,
const char **versionPtr,
const char **versionEndPtr,
const char **encodingName,
const ENCODING **encoding,
int *standalone)
{
return doParseXmlDecl(NS(findEncoding),
isGeneralTextEntity,
enc,
ptr,
end,
badPtr,
versionPtr,
versionEndPtr,
encodingName,
encoding,
standalone);
}
#endif /* XML_TOK_NS_C */

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The Independent JPEG Group's JPEG software
==========================================
README for release 6b of 27-Mar-1998
====================================
This distribution contains the sixth public release of the Independent JPEG
Group's free JPEG software. You are welcome to redistribute this software and
to use it for any purpose, subject to the conditions under LEGAL ISSUES, below.
Serious users of this software (particularly those incorporating it into
larger programs) should contact IJG at jpeg-info@uunet.uu.net to be added to
our electronic mailing list. Mailing list members are notified of updates
and have a chance to participate in technical discussions, etc.
This software is the work of Tom Lane, Philip Gladstone, Jim Boucher,
Lee Crocker, Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi,
Guido Vollbeding, Ge' Weijers, and other members of the Independent JPEG
Group.
IJG is not affiliated with the official ISO JPEG standards committee.
DOCUMENTATION ROADMAP
=====================
This file contains the following sections:
OVERVIEW General description of JPEG and the IJG software.
LEGAL ISSUES Copyright, lack of warranty, terms of distribution.
REFERENCES Where to learn more about JPEG.
ARCHIVE LOCATIONS Where to find newer versions of this software.
RELATED SOFTWARE Other stuff you should get.
FILE FORMAT WARS Software *not* to get.
TO DO Plans for future IJG releases.
Other documentation files in the distribution are:
User documentation:
install.doc How to configure and install the IJG software.
usage.doc Usage instructions for cjpeg, djpeg, jpegtran,
rdjpgcom, and wrjpgcom.
*.1 Unix-style man pages for programs (same info as usage.doc).
wizard.doc Advanced usage instructions for JPEG wizards only.
change.log Version-to-version change highlights.
Programmer and internal documentation:
libjpeg.doc How to use the JPEG library in your own programs.
example.c Sample code for calling the JPEG library.
structure.doc Overview of the JPEG library's internal structure.
filelist.doc Road map of IJG files.
coderules.doc Coding style rules --- please read if you contribute code.
Please read at least the files install.doc and usage.doc. Useful information
can also be found in the JPEG FAQ (Frequently Asked Questions) article. See
ARCHIVE LOCATIONS below to find out where to obtain the FAQ article.
If you want to understand how the JPEG code works, we suggest reading one or
more of the REFERENCES, then looking at the documentation files (in roughly
the order listed) before diving into the code.
OVERVIEW
========
This package contains C software to implement JPEG image compression and
decompression. JPEG (pronounced "jay-peg") is a standardized compression
method for full-color and gray-scale images. JPEG is intended for compressing
"real-world" scenes; line drawings, cartoons and other non-realistic images
are not its strong suit. JPEG is lossy, meaning that the output image is not
exactly identical to the input image. Hence you must not use JPEG if you
have to have identical output bits. However, on typical photographic images,
very good compression levels can be obtained with no visible change, and
remarkably high compression levels are possible if you can tolerate a
low-quality image. For more details, see the references, or just experiment
with various compression settings.
This software implements JPEG baseline, extended-sequential, and progressive
compression processes. Provision is made for supporting all variants of these
processes, although some uncommon parameter settings aren't implemented yet.
For legal reasons, we are not distributing code for the arithmetic-coding
variants of JPEG; see LEGAL ISSUES. We have made no provision for supporting
the hierarchical or lossless processes defined in the standard.
We provide a set of library routines for reading and writing JPEG image files,
plus two sample applications "cjpeg" and "djpeg", which use the library to
perform conversion between JPEG and some other popular image file formats.
The library is intended to be reused in other applications.
In order to support file conversion and viewing software, we have included
considerable functionality beyond the bare JPEG coding/decoding capability;
for example, the color quantization modules are not strictly part of JPEG
decoding, but they are essential for output to colormapped file formats or
colormapped displays. These extra functions can be compiled out of the
library if not required for a particular application. We have also included
"jpegtran", a utility for lossless transcoding between different JPEG
processes, and "rdjpgcom" and "wrjpgcom", two simple applications for
inserting and extracting textual comments in JFIF files.
The emphasis in designing this software has been on achieving portability and
flexibility, while also making it fast enough to be useful. In particular,
the software is not intended to be read as a tutorial on JPEG. (See the
REFERENCES section for introductory material.) Rather, it is intended to
be reliable, portable, industrial-strength code. We do not claim to have
achieved that goal in every aspect of the software, but we strive for it.
We welcome the use of this software as a component of commercial products.
No royalty is required, but we do ask for an acknowledgement in product
documentation, as described under LEGAL ISSUES.
LEGAL ISSUES
============
In plain English:
1. We don't promise that this software works. (But if you find any bugs,
please let us know!)
2. You can use this software for whatever you want. You don't have to pay us.
3. You may not pretend that you wrote this software. If you use it in a
program, you must acknowledge somewhere in your documentation that
you've used the IJG code.
In legalese:
The authors make NO WARRANTY or representation, either express or implied,
with respect to this software, its quality, accuracy, merchantability, or
fitness for a particular purpose. This software is provided "AS IS", and you,
its user, assume the entire risk as to its quality and accuracy.
This software is copyright (C) 1991-1998, Thomas G. Lane.
All Rights Reserved except as specified below.
Permission is hereby granted to use, copy, modify, and distribute this
software (or portions thereof) for any purpose, without fee, subject to these
conditions:
(1) If any part of the source code for this software is distributed, then this
README file must be included, with this copyright and no-warranty notice
unaltered; and any additions, deletions, or changes to the original files
must be clearly indicated in accompanying documentation.
(2) If only executable code is distributed, then the accompanying
documentation must state that "this software is based in part on the work of
the Independent JPEG Group".
(3) Permission for use of this software is granted only if the user accepts
full responsibility for any undesirable consequences; the authors accept
NO LIABILITY for damages of any kind.
These conditions apply to any software derived from or based on the IJG code,
not just to the unmodified library. If you use our work, you ought to
acknowledge us.
Permission is NOT granted for the use of any IJG author's name or company name
in advertising or publicity relating to this software or products derived from
it. This software may be referred to only as "the Independent JPEG Group's
software".
We specifically permit and encourage the use of this software as the basis of
commercial products, provided that all warranty or liability claims are
assumed by the product vendor.
ansi2knr.c is included in this distribution by permission of L. Peter Deutsch,
sole proprietor of its copyright holder, Aladdin Enterprises of Menlo Park, CA.
ansi2knr.c is NOT covered by the above copyright and conditions, but instead
by the usual distribution terms of the Free Software Foundation; principally,
that you must include source code if you redistribute it. (See the file
ansi2knr.c for full details.) However, since ansi2knr.c is not needed as part
of any program generated from the IJG code, this does not limit you more than
the foregoing paragraphs do.
The Unix configuration script "configure" was produced with GNU Autoconf.
It is copyright by the Free Software Foundation but is freely distributable.
The same holds for its supporting scripts (config.guess, config.sub,
ltconfig, ltmain.sh). Another support script, install-sh, is copyright
by M.I.T. but is also freely distributable.
It appears that the arithmetic coding option of the JPEG spec is covered by
patents owned by IBM, AT&T, and Mitsubishi. Hence arithmetic coding cannot
legally be used without obtaining one or more licenses. For this reason,
support for arithmetic coding has been removed from the free JPEG software.
(Since arithmetic coding provides only a marginal gain over the unpatented
Huffman mode, it is unlikely that very many implementations will support it.)
So far as we are aware, there are no patent restrictions on the remaining
code.
The IJG distribution formerly included code to read and write GIF files.
To avoid entanglement with the Unisys LZW patent, GIF reading support has
been removed altogether, and the GIF writer has been simplified to produce
"uncompressed GIFs". This technique does not use the LZW algorithm; the
resulting GIF files are larger than usual, but are readable by all standard
GIF decoders.
We are required to state that
"The Graphics Interchange Format(c) is the Copyright property of
CompuServe Incorporated. GIF(sm) is a Service Mark property of
CompuServe Incorporated."
REFERENCES
==========
We highly recommend reading one or more of these references before trying to
understand the innards of the JPEG software.
The best short technical introduction to the JPEG compression algorithm is
Wallace, Gregory K. "The JPEG Still Picture Compression Standard",
Communications of the ACM, April 1991 (vol. 34 no. 4), pp. 30-44.
(Adjacent articles in that issue discuss MPEG motion picture compression,
applications of JPEG, and related topics.) If you don't have the CACM issue
handy, a PostScript file containing a revised version of Wallace's article is
available at ftp://ftp.uu.net/graphics/jpeg/wallace.ps.gz. The file (actually
a preprint for an article that appeared in IEEE Trans. Consumer Electronics)
omits the sample images that appeared in CACM, but it includes corrections
and some added material. Note: the Wallace article is copyright ACM and IEEE,
and it may not be used for commercial purposes.
A somewhat less technical, more leisurely introduction to JPEG can be found in
"The Data Compression Book" by Mark Nelson and Jean-loup Gailly, published by
M&T Books (New York), 2nd ed. 1996, ISBN 1-55851-434-1. This book provides
good explanations and example C code for a multitude of compression methods
including JPEG. It is an excellent source if you are comfortable reading C
code but don't know much about data compression in general. The book's JPEG
sample code is far from industrial-strength, but when you are ready to look
at a full implementation, you've got one here...
The best full description of JPEG is the textbook "JPEG Still Image Data
Compression Standard" by William B. Pennebaker and Joan L. Mitchell, published
by Van Nostrand Reinhold, 1993, ISBN 0-442-01272-1. Price US$59.95, 638 pp.
The book includes the complete text of the ISO JPEG standards (DIS 10918-1
and draft DIS 10918-2). This is by far the most complete exposition of JPEG
in existence, and we highly recommend it.
The JPEG standard itself is not available electronically; you must order a
paper copy through ISO or ITU. (Unless you feel a need to own a certified
official copy, we recommend buying the Pennebaker and Mitchell book instead;
it's much cheaper and includes a great deal of useful explanatory material.)
In the USA, copies of the standard may be ordered from ANSI Sales at (212)
642-4900, or from Global Engineering Documents at (800) 854-7179. (ANSI
doesn't take credit card orders, but Global does.) It's not cheap: as of
1992, ANSI was charging $95 for Part 1 and $47 for Part 2, plus 7%
shipping/handling. The standard is divided into two parts, Part 1 being the
actual specification, while Part 2 covers compliance testing methods. Part 1
is titled "Digital Compression and Coding of Continuous-tone Still Images,
Part 1: Requirements and guidelines" and has document numbers ISO/IEC IS
10918-1, ITU-T T.81. Part 2 is titled "Digital Compression and Coding of
Continuous-tone Still Images, Part 2: Compliance testing" and has document
numbers ISO/IEC IS 10918-2, ITU-T T.83.
Some extensions to the original JPEG standard are defined in JPEG Part 3,
a newer ISO standard numbered ISO/IEC IS 10918-3 and ITU-T T.84. IJG
currently does not support any Part 3 extensions.
The JPEG standard does not specify all details of an interchangeable file
format. For the omitted details we follow the "JFIF" conventions, revision
1.02. A copy of the JFIF spec is available from:
Literature Department
C-Cube Microsystems, Inc.
1778 McCarthy Blvd.
Milpitas, CA 95035
phone (408) 944-6300, fax (408) 944-6314
A PostScript version of this document is available by FTP at
ftp://ftp.uu.net/graphics/jpeg/jfif.ps.gz. There is also a plain text
version at ftp://ftp.uu.net/graphics/jpeg/jfif.txt.gz, but it is missing
the figures.
The TIFF 6.0 file format specification can be obtained by FTP from
ftp://ftp.sgi.com/graphics/tiff/TIFF6.ps.gz. The JPEG incorporation scheme
found in the TIFF 6.0 spec of 3-June-92 has a number of serious problems.
IJG does not recommend use of the TIFF 6.0 design (TIFF Compression tag 6).
Instead, we recommend the JPEG design proposed by TIFF Technical Note #2
(Compression tag 7). Copies of this Note can be obtained from ftp.sgi.com or
from ftp://ftp.uu.net/graphics/jpeg/. It is expected that the next revision
of the TIFF spec will replace the 6.0 JPEG design with the Note's design.
Although IJG's own code does not support TIFF/JPEG, the free libtiff library
uses our library to implement TIFF/JPEG per the Note. libtiff is available
from ftp://ftp.sgi.com/graphics/tiff/.
ARCHIVE LOCATIONS
=================
The "official" archive site for this software is ftp.uu.net (Internet
address 192.48.96.9). The most recent released version can always be found
there in directory graphics/jpeg. This particular version will be archived
as ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz. If you don't have
direct Internet access, UUNET's archives are also available via UUCP; contact
help@uunet.uu.net for information on retrieving files that way.
Numerous Internet sites maintain copies of the UUNET files. However, only
ftp.uu.net is guaranteed to have the latest official version.
You can also obtain this software in DOS-compatible "zip" archive format from
the SimTel archives (ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/), or
on CompuServe in the Graphics Support forum (GO CIS:GRAPHSUP), library 12
"JPEG Tools". Again, these versions may sometimes lag behind the ftp.uu.net
release.
The JPEG FAQ (Frequently Asked Questions) article is a useful source of
general information about JPEG. It is updated constantly and therefore is
not included in this distribution. The FAQ is posted every two weeks to
Usenet newsgroups comp.graphics.misc, news.answers, and other groups.
It is available on the World Wide Web at http://www.faqs.org/faqs/jpeg-faq/
and other news.answers archive sites, including the official news.answers
archive at rtfm.mit.edu: ftp://rtfm.mit.edu/pub/usenet/news.answers/jpeg-faq/.
If you don't have Web or FTP access, send e-mail to mail-server@rtfm.mit.edu
with body
send usenet/news.answers/jpeg-faq/part1
send usenet/news.answers/jpeg-faq/part2
RELATED SOFTWARE
================
Numerous viewing and image manipulation programs now support JPEG. (Quite a
few of them use this library to do so.) The JPEG FAQ described above lists
some of the more popular free and shareware viewers, and tells where to
obtain them on Internet.
If you are on a Unix machine, we highly recommend Jef Poskanzer's free
PBMPLUS software, which provides many useful operations on PPM-format image
files. In particular, it can convert PPM images to and from a wide range of
other formats, thus making cjpeg/djpeg considerably more useful. The latest
version is distributed by the NetPBM group, and is available from numerous
sites, notably ftp://wuarchive.wustl.edu/graphics/graphics/packages/NetPBM/.
Unfortunately PBMPLUS/NETPBM is not nearly as portable as the IJG software is;
you are likely to have difficulty making it work on any non-Unix machine.
A different free JPEG implementation, written by the PVRG group at Stanford,
is available from ftp://havefun.stanford.edu/pub/jpeg/. This program
is designed for research and experimentation rather than production use;
it is slower, harder to use, and less portable than the IJG code, but it
is easier to read and modify. Also, the PVRG code supports lossless JPEG,
which we do not. (On the other hand, it doesn't do progressive JPEG.)
FILE FORMAT WARS
================
Some JPEG programs produce files that are not compatible with our library.
The root of the problem is that the ISO JPEG committee failed to specify a
concrete file format. Some vendors "filled in the blanks" on their own,
creating proprietary formats that no one else could read. (For example, none
of the early commercial JPEG implementations for the Macintosh were able to
exchange compressed files.)
The file format we have adopted is called JFIF (see REFERENCES). This format
has been agreed to by a number of major commercial JPEG vendors, and it has
become the de facto standard. JFIF is a minimal or "low end" representation.
We recommend the use of TIFF/JPEG (TIFF revision 6.0 as modified by TIFF
Technical Note #2) for "high end" applications that need to record a lot of
additional data about an image. TIFF/JPEG is fairly new and not yet widely
supported, unfortunately.
The upcoming JPEG Part 3 standard defines a file format called SPIFF.
SPIFF is interoperable with JFIF, in the sense that most JFIF decoders should
be able to read the most common variant of SPIFF. SPIFF has some technical
advantages over JFIF, but its major claim to fame is simply that it is an
official standard rather than an informal one. At this point it is unclear
whether SPIFF will supersede JFIF or whether JFIF will remain the de-facto
standard. IJG intends to support SPIFF once the standard is frozen, but we
have not decided whether it should become our default output format or not.
(In any case, our decoder will remain capable of reading JFIF indefinitely.)
Various proprietary file formats incorporating JPEG compression also exist.
We have little or no sympathy for the existence of these formats. Indeed,
one of the original reasons for developing this free software was to help
force convergence on common, open format standards for JPEG files. Don't
use a proprietary file format!
TO DO
=====
The major thrust for v7 will probably be improvement of visual quality.
The current method for scaling the quantization tables is known not to be
very good at low Q values. We also intend to investigate block boundary
smoothing, "poor man's variable quantization", and other means of improving
quality-vs-file-size performance without sacrificing compatibility.
In future versions, we are considering supporting some of the upcoming JPEG
Part 3 extensions --- principally, variable quantization and the SPIFF file
format.
As always, speeding things up is of great interest.
Please send bug reports, offers of help, etc. to jpeg-info@uunet.uu.net.

36
src/3rdparty/src/jpeg-6b/ansi2knr.1 vendored
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@ -1,36 +0,0 @@
.TH ANSI2KNR 1 "19 Jan 1996"
.SH NAME
ansi2knr \- convert ANSI C to Kernighan & Ritchie C
.SH SYNOPSIS
.I ansi2knr
[--varargs] input_file [output_file]
.SH DESCRIPTION
If no output_file is supplied, output goes to stdout.
.br
There are no error messages.
.sp
.I ansi2knr
recognizes function definitions by seeing a non-keyword identifier at the left
margin, followed by a left parenthesis, with a right parenthesis as the last
character on the line, and with a left brace as the first token on the
following line (ignoring possible intervening comments). It will recognize a
multi-line header provided that no intervening line ends with a left or right
brace or a semicolon. These algorithms ignore whitespace and comments, except
that the function name must be the first thing on the line.
.sp
The following constructs will confuse it:
.br
- Any other construct that starts at the left margin and follows the
above syntax (such as a macro or function call).
.br
- Some macros that tinker with the syntax of the function header.
.sp
The --varargs switch is obsolete, and is recognized only for
backwards compatibility. The present version of
.I ansi2knr
will always attempt to convert a ... argument to va_alist and va_dcl.
.SH AUTHOR
L. Peter Deutsch <ghost@aladdin.com> wrote the original ansi2knr and
continues to maintain the current version; most of the code in the current
version is his work. ansi2knr also includes contributions by Francois
Pinard <pinard@iro.umontreal.ca> and Jim Avera <jima@netcom.com>.

693
src/3rdparty/src/jpeg-6b/ansi2knr.c vendored
View File

@ -1,693 +0,0 @@
/* ansi2knr.c */
/* Convert ANSI C function definitions to K&R ("traditional C") syntax */
/*
ansi2knr is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY. No author or distributor accepts responsibility to anyone for the
consequences of using it or for whether it serves any particular purpose or
works at all, unless he says so in writing. Refer to the GNU General Public
License (the "GPL") for full details.
Everyone is granted permission to copy, modify and redistribute ansi2knr,
but only under the conditions described in the GPL. A copy of this license
is supposed to have been given to you along with ansi2knr so you can know
your rights and responsibilities. It should be in a file named COPYLEFT.
[In the IJG distribution, the GPL appears below, not in a separate file.]
Among other things, the copyright notice and this notice must be preserved
on all copies.
We explicitly state here what we believe is already implied by the GPL: if
the ansi2knr program is distributed as a separate set of sources and a
separate executable file which are aggregated on a storage medium together
with another program, this in itself does not bring the other program under
the GPL, nor does the mere fact that such a program or the procedures for
constructing it invoke the ansi2knr executable bring any other part of the
program under the GPL.
*/
/*
---------- Here is the GNU GPL file COPYLEFT, referred to above ----------
----- These terms do NOT apply to the JPEG software itself; see README ------
GHOSTSCRIPT GENERAL PUBLIC LICENSE
(Clarified 11 Feb 1988)
Copyright (C) 1988 Richard M. Stallman
Everyone is permitted to copy and distribute verbatim copies of this
license, but changing it is not allowed. You can also use this wording
to make the terms for other programs.
The license agreements of most software companies keep you at the
mercy of those companies. By contrast, our general public license is
intended to give everyone the right to share Ghostscript. To make sure
that you get the rights we want you to have, we need to make
restrictions that forbid anyone to deny you these rights or to ask you
to surrender the rights. Hence this license agreement.
Specifically, we want to make sure that you have the right to give
away copies of Ghostscript, that you receive source code or else can get
it if you want it, that you can change Ghostscript or use pieces of it
in new free programs, and that you know you can do these things.
To make sure that everyone has such rights, we have to forbid you to
deprive anyone else of these rights. For example, if you distribute
copies of Ghostscript, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must tell them their rights.
Also, for our own protection, we must make certain that everyone finds
out that there is no warranty for Ghostscript. If Ghostscript is
modified by someone else and passed on, we want its recipients to know
that what they have is not what we distributed, so that any problems
introduced by others will not reflect on our reputation.
Therefore we (Richard M. Stallman and the Free Software Foundation,
Inc.) make the following terms which say what you must do to be allowed
to distribute or change Ghostscript.
COPYING POLICIES
1. You may copy and distribute verbatim copies of Ghostscript source
code as you receive it, in any medium, provided that you conspicuously
and appropriately publish on each copy a valid copyright and license
notice "Copyright (C) 1989 Aladdin Enterprises. All rights reserved.
Distributed by Free Software Foundation, Inc." (or with whatever year is
appropriate); keep intact the notices on all files that refer to this
License Agreement and to the absence of any warranty; and give any other
recipients of the Ghostscript program a copy of this License Agreement
along with the program. You may charge a distribution fee for the
physical act of transferring a copy.
2. You may modify your copy or copies of Ghostscript or any portion of
it, and copy and distribute such modifications under the terms of
Paragraph 1 above, provided that you also do the following:
a) cause the modified files to carry prominent notices stating
that you changed the files and the date of any change; and
b) cause the whole of any work that you distribute or publish,
that in whole or in part contains or is a derivative of Ghostscript
or any part thereof, to be licensed at no charge to all third
parties on terms identical to those contained in this License
Agreement (except that you may choose to grant more extensive
warranty protection to some or all third parties, at your option).
c) You may charge a distribution fee for the physical act of
transferring a copy, and you may at your option offer warranty
protection in exchange for a fee.
Mere aggregation of another unrelated program with this program (or its
derivative) on a volume of a storage or distribution medium does not bring
the other program under the scope of these terms.
3. You may copy and distribute Ghostscript (or a portion or derivative
of it, under Paragraph 2) in object code or executable form under the
terms of Paragraphs 1 and 2 above provided that you also do one of the
following:
a) accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of
Paragraphs 1 and 2 above; or,
b) accompany it with a written offer, valid for at least three
years, to give any third party free (except for a nominal
shipping charge) a complete machine-readable copy of the
corresponding source code, to be distributed under the terms of
Paragraphs 1 and 2 above; or,
c) accompany it with the information you received as to where the
corresponding source code may be obtained. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form alone.)
For an executable file, complete source code means all the source code for
all modules it contains; but, as a special exception, it need not include
source code for modules which are standard libraries that accompany the
operating system on which the executable file runs.
4. You may not copy, sublicense, distribute or transfer Ghostscript
except as expressly provided under this License Agreement. Any attempt
otherwise to copy, sublicense, distribute or transfer Ghostscript is
void and your rights to use the program under this License agreement
shall be automatically terminated. However, parties who have received
computer software programs from you with this License Agreement will not
have their licenses terminated so long as such parties remain in full
compliance.
5. If you wish to incorporate parts of Ghostscript into other free
programs whose distribution conditions are different, write to the Free
Software Foundation at 675 Mass Ave, Cambridge, MA 02139. We have not
yet worked out a simple rule that can be stated here, but we will often
permit this. We will be guided by the two goals of preserving the free
status of all derivatives of our free software and of promoting the
sharing and reuse of software.
Your comments and suggestions about our licensing policies and our
software are welcome! Please contact the Free Software Foundation,
Inc., 675 Mass Ave, Cambridge, MA 02139, or call (617) 876-3296.
NO WARRANTY
BECAUSE GHOSTSCRIPT IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY
NO WARRANTY, TO THE EXTENT PERMITTED BY APPLICABLE STATE LAW. EXCEPT
WHEN OTHERWISE STATED IN WRITING, FREE SOFTWARE FOUNDATION, INC, RICHARD
M. STALLMAN, ALADDIN ENTERPRISES, L. PETER DEUTSCH, AND/OR OTHER PARTIES
PROVIDE GHOSTSCRIPT "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF GHOSTSCRIPT IS WITH
YOU. SHOULD GHOSTSCRIPT PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
NECESSARY SERVICING, REPAIR OR CORRECTION.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL RICHARD M.
STALLMAN, THE FREE SOFTWARE FOUNDATION, INC., L. PETER DEUTSCH, ALADDIN
ENTERPRISES, AND/OR ANY OTHER PARTY WHO MAY MODIFY AND REDISTRIBUTE
GHOSTSCRIPT AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING
ANY LOST PROFITS, LOST MONIES, OR OTHER SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
(INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
INACCURATE OR LOSSES SUSTAINED BY THIRD PARTIES OR A FAILURE OF THE
PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS) GHOSTSCRIPT, EVEN IF YOU
HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM
BY ANY OTHER PARTY.
-------------------- End of file COPYLEFT ------------------------------
*/
/*
* Usage:
ansi2knr input_file [output_file]
* If no output_file is supplied, output goes to stdout.
* There are no error messages.
*
* ansi2knr recognizes function definitions by seeing a non-keyword
* identifier at the left margin, followed by a left parenthesis,
* with a right parenthesis as the last character on the line,
* and with a left brace as the first token on the following line
* (ignoring possible intervening comments).
* It will recognize a multi-line header provided that no intervening
* line ends with a left or right brace or a semicolon.
* These algorithms ignore whitespace and comments, except that
* the function name must be the first thing on the line.
* The following constructs will confuse it:
* - Any other construct that starts at the left margin and
* follows the above syntax (such as a macro or function call).
* - Some macros that tinker with the syntax of the function header.
*/
/*
* The original and principal author of ansi2knr is L. Peter Deutsch
* <ghost@aladdin.com>. Other authors are noted in the change history
* that follows (in reverse chronological order):
lpd 96-01-21 added code to cope with not HAVE_CONFIG_H and with
compilers that don't understand void, as suggested by
Tom Lane
lpd 96-01-15 changed to require that the first non-comment token
on the line following a function header be a left brace,
to reduce sensitivity to macros, as suggested by Tom Lane
<tgl@sss.pgh.pa.us>
lpd 95-06-22 removed #ifndefs whose sole purpose was to define
undefined preprocessor symbols as 0; changed all #ifdefs
for configuration symbols to #ifs
lpd 95-04-05 changed copyright notice to make it clear that
including ansi2knr in a program does not bring the entire
program under the GPL
lpd 94-12-18 added conditionals for systems where ctype macros
don't handle 8-bit characters properly, suggested by
Francois Pinard <pinard@iro.umontreal.ca>;
removed --varargs switch (this is now the default)
lpd 94-10-10 removed CONFIG_BROKETS conditional
lpd 94-07-16 added some conditionals to help GNU `configure',
suggested by Francois Pinard <pinard@iro.umontreal.ca>;
properly erase prototype args in function parameters,
contributed by Jim Avera <jima@netcom.com>;
correct error in writeblanks (it shouldn't erase EOLs)
lpd 89-xx-xx original version
*/
/* Most of the conditionals here are to make ansi2knr work with */
/* or without the GNU configure machinery. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <ctype.h>
#if HAVE_CONFIG_H
/*
For properly autoconfiguring ansi2knr, use AC_CONFIG_HEADER(config.h).
This will define HAVE_CONFIG_H and so, activate the following lines.
*/
# if STDC_HEADERS || HAVE_STRING_H
# include <string.h>
# else
# include <strings.h>
# endif
#else /* not HAVE_CONFIG_H */
/* Otherwise do it the hard way */
# ifdef BSD
# include <strings.h>
# else
# ifdef VMS
extern int strlen(), strncmp();
# else
# include <string.h>
# endif
# endif
#endif /* not HAVE_CONFIG_H */
#if STDC_HEADERS
# include <stdlib.h>
#else
/*
malloc and free should be declared in stdlib.h,
but if you've got a K&R compiler, they probably aren't.
*/
# ifdef MSDOS
# include <malloc.h>
# else
# ifdef VMS
extern char *malloc();
extern void free();
# else
extern char *malloc();
extern int free();
# endif
# endif
#endif
/*
* The ctype macros don't always handle 8-bit characters correctly.
* Compensate for this here.
*/
#ifdef isascii
# undef HAVE_ISASCII /* just in case */
# define HAVE_ISASCII 1
#else
#endif
#if STDC_HEADERS || !HAVE_ISASCII
# define is_ascii(c) 1
#else
# define is_ascii(c) isascii(c)
#endif
#define is_space(c) (is_ascii(c) && isspace(c))
#define is_alpha(c) (is_ascii(c) && isalpha(c))
#define is_alnum(c) (is_ascii(c) && isalnum(c))
/* Scanning macros */
#define isidchar(ch) (is_alnum(ch) || (ch) == '_')
#define isidfirstchar(ch) (is_alpha(ch) || (ch) == '_')
/* Forward references */
char *skipspace();
int writeblanks();
int test1();
int convert1();
/* The main program */
int
main(argc, argv)
int argc;
char *argv[];
{ FILE *in, *out;
#define bufsize 5000 /* arbitrary size */
char *buf;
char *line;
char *more;
/*
* In previous versions, ansi2knr recognized a --varargs switch.
* If this switch was supplied, ansi2knr would attempt to convert
* a ... argument to va_alist and va_dcl; if this switch was not
* supplied, ansi2knr would simply drop any such arguments.
* Now, ansi2knr always does this conversion, and we only
* check for this switch for backward compatibility.
*/
int convert_varargs = 1;
if ( argc > 1 && argv[1][0] == '-' )
{ if ( !strcmp(argv[1], "--varargs") )
{ convert_varargs = 1;
argc--;
argv++;
}
else
{ fprintf(stderr, "Unrecognized switch: %s\n", argv[1]);
exit(1);
}
}
switch ( argc )
{
default:
printf("Usage: ansi2knr input_file [output_file]\n");
exit(0);
case 2:
out = stdout;
break;
case 3:
out = fopen(argv[2], "w");
if ( out == NULL )
{ fprintf(stderr, "Cannot open output file %s\n", argv[2]);
exit(1);
}
}
in = fopen(argv[1], "r");
if ( in == NULL )
{ fprintf(stderr, "Cannot open input file %s\n", argv[1]);
exit(1);
}
fprintf(out, "#line 1 \"%s\"\n", argv[1]);
buf = malloc(bufsize);
line = buf;
while ( fgets(line, (unsigned)(buf + bufsize - line), in) != NULL )
{
test: line += strlen(line);
switch ( test1(buf) )
{
case 2: /* a function header */
convert1(buf, out, 1, convert_varargs);
break;
case 1: /* a function */
/* Check for a { at the start of the next line. */
more = ++line;
f: if ( line >= buf + (bufsize - 1) ) /* overflow check */
goto wl;
if ( fgets(line, (unsigned)(buf + bufsize - line), in) == NULL )
goto wl;
switch ( *skipspace(more, 1) )
{
case '{':
/* Definitely a function header. */
convert1(buf, out, 0, convert_varargs);
fputs(more, out);
break;
case 0:
/* The next line was blank or a comment: */
/* keep scanning for a non-comment. */
line += strlen(line);
goto f;
default:
/* buf isn't a function header, but */
/* more might be. */
fputs(buf, out);
strcpy(buf, more);
line = buf;
goto test;
}
break;
case -1: /* maybe the start of a function */
if ( line != buf + (bufsize - 1) ) /* overflow check */
continue;
/* falls through */
default: /* not a function */
wl: fputs(buf, out);
break;
}
line = buf;
}
if ( line != buf )
fputs(buf, out);
free(buf);
fclose(out);
fclose(in);
return 0;
}
/* Skip over space and comments, in either direction. */
char *
skipspace(p, dir)
register char *p;
register int dir; /* 1 for forward, -1 for backward */
{ for ( ; ; )
{ while ( is_space(*p) )
p += dir;
if ( !(*p == '/' && p[dir] == '*') )
break;
p += dir; p += dir;
while ( !(*p == '*' && p[dir] == '/') )
{ if ( *p == 0 )
return p; /* multi-line comment?? */
p += dir;
}
p += dir; p += dir;
}
return p;
}
/*
* Write blanks over part of a string.
* Don't overwrite end-of-line characters.
*/
int
writeblanks(start, end)
char *start;
char *end;
{ char *p;
for ( p = start; p < end; p++ )
if ( *p != '\r' && *p != '\n' )
*p = ' ';
return 0;
}
/*
* Test whether the string in buf is a function definition.
* The string may contain and/or end with a newline.
* Return as follows:
* 0 - definitely not a function definition;
* 1 - definitely a function definition;
* 2 - definitely a function prototype (NOT USED);
* -1 - may be the beginning of a function definition,
* append another line and look again.
* The reason we don't attempt to convert function prototypes is that
* Ghostscript's declaration-generating macros look too much like
* prototypes, and confuse the algorithms.
*/
int
test1(buf)
char *buf;
{ register char *p = buf;
char *bend;
char *endfn;
int contin;
if ( !isidfirstchar(*p) )
return 0; /* no name at left margin */
bend = skipspace(buf + strlen(buf) - 1, -1);
switch ( *bend )
{
case ';': contin = 0 /*2*/; break;
case ')': contin = 1; break;
case '{': return 0; /* not a function */
case '}': return 0; /* not a function */
default: contin = -1;
}
while ( isidchar(*p) )
p++;
endfn = p;
p = skipspace(p, 1);
if ( *p++ != '(' )
return 0; /* not a function */
p = skipspace(p, 1);
if ( *p == ')' )
return 0; /* no parameters */
/* Check that the apparent function name isn't a keyword. */
/* We only need to check for keywords that could be followed */
/* by a left parenthesis (which, unfortunately, is most of them). */
{ static char *words[] =
{ "asm", "auto", "case", "char", "const", "double",
"extern", "float", "for", "if", "int", "long",
"register", "return", "short", "signed", "sizeof",
"static", "switch", "typedef", "unsigned",
"void", "volatile", "while", 0
};
char **key = words;
char *kp;
int len = endfn - buf;
while ( (kp = *key) != 0 )
{ if ( strlen(kp) == len && !strncmp(kp, buf, len) )
return 0; /* name is a keyword */
key++;
}
}
return contin;
}
/* Convert a recognized function definition or header to K&R syntax. */
int
convert1(buf, out, header, convert_varargs)
char *buf;
FILE *out;
int header; /* Boolean */
int convert_varargs; /* Boolean */
{ char *endfn;
register char *p;
char **breaks;
unsigned num_breaks = 2; /* for testing */
char **btop;
char **bp;
char **ap;
char *vararg = 0;
/* Pre-ANSI implementations don't agree on whether strchr */
/* is called strchr or index, so we open-code it here. */
for ( endfn = buf; *(endfn++) != '('; )
;
top: p = endfn;
breaks = (char **)malloc(sizeof(char *) * num_breaks * 2);
if ( breaks == 0 )
{ /* Couldn't allocate break table, give up */
fprintf(stderr, "Unable to allocate break table!\n");
fputs(buf, out);
return -1;
}
btop = breaks + num_breaks * 2 - 2;
bp = breaks;
/* Parse the argument list */
do
{ int level = 0;
char *lp = NULL;
char *rp;
char *end = NULL;
if ( bp >= btop )
{ /* Filled up break table. */
/* Allocate a bigger one and start over. */
free((char *)breaks);
num_breaks <<= 1;
goto top;
}
*bp++ = p;
/* Find the end of the argument */
for ( ; end == NULL; p++ )
{ switch(*p)
{
case ',':
if ( !level ) end = p;
break;
case '(':
if ( !level ) lp = p;
level++;
break;
case ')':
if ( --level < 0 ) end = p;
else rp = p;
break;
case '/':
p = skipspace(p, 1) - 1;
break;
default:
;
}
}
/* Erase any embedded prototype parameters. */
if ( lp )
writeblanks(lp + 1, rp);
p--; /* back up over terminator */
/* Find the name being declared. */
/* This is complicated because of procedure and */
/* array modifiers. */
for ( ; ; )
{ p = skipspace(p - 1, -1);
switch ( *p )
{
case ']': /* skip array dimension(s) */
case ')': /* skip procedure args OR name */
{ int level = 1;
while ( level )
switch ( *--p )
{
case ']': case ')': level++; break;
case '[': case '(': level--; break;
case '/': p = skipspace(p, -1) + 1; break;
default: ;
}
}
if ( *p == '(' && *skipspace(p + 1, 1) == '*' )
{ /* We found the name being declared */
while ( !isidfirstchar(*p) )
p = skipspace(p, 1) + 1;
goto found;
}
break;
default:
goto found;
}
}
found: if ( *p == '.' && p[-1] == '.' && p[-2] == '.' )
{ if ( convert_varargs )
{ *bp++ = "va_alist";
vararg = p-2;
}
else
{ p++;
if ( bp == breaks + 1 ) /* sole argument */
writeblanks(breaks[0], p);
else
writeblanks(bp[-1] - 1, p);
bp--;
}
}
else
{ while ( isidchar(*p) ) p--;
*bp++ = p+1;
}
p = end;
}
while ( *p++ == ',' );
*bp = p;
/* Make a special check for 'void' arglist */
if ( bp == breaks+2 )
{ p = skipspace(breaks[0], 1);
if ( !strncmp(p, "void", 4) )
{ p = skipspace(p+4, 1);
if ( p == breaks[2] - 1 )
{ bp = breaks; /* yup, pretend arglist is empty */
writeblanks(breaks[0], p + 1);
}
}
}
/* Put out the function name and left parenthesis. */
p = buf;
while ( p != endfn ) putc(*p, out), p++;
/* Put out the declaration. */
if ( header )
{ fputs(");", out);
for ( p = breaks[0]; *p; p++ )
if ( *p == '\r' || *p == '\n' )
putc(*p, out);
}
else
{ for ( ap = breaks+1; ap < bp; ap += 2 )
{ p = *ap;
while ( isidchar(*p) )
putc(*p, out), p++;
if ( ap < bp - 1 )
fputs(", ", out);
}
fputs(") ", out);
/* Put out the argument declarations */
for ( ap = breaks+2; ap <= bp; ap += 2 )
(*ap)[-1] = ';';
if ( vararg != 0 )
{ *vararg = 0;
fputs(breaks[0], out); /* any prior args */
fputs("va_dcl", out); /* the final arg */
fputs(bp[0], out);
}
else
fputs(breaks[0], out);
}
free((char *)breaks);
return 0;
}

181
src/3rdparty/src/jpeg-6b/cdjpeg.c vendored
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@ -1,181 +0,0 @@
/*
* cdjpeg.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains common support routines used by the IJG application
* programs (cjpeg, djpeg, jpegtran).
*/
#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
#include <ctype.h> /* to declare isupper(), tolower() */
#ifdef NEED_SIGNAL_CATCHER
#include <signal.h> /* to declare signal() */
#endif
#ifdef USE_SETMODE
#include <fcntl.h> /* to declare setmode()'s parameter macros */
/* If you have setmode() but not <io.h>, just delete this line: */
#include <io.h> /* to declare setmode() */
#endif
/*
* Signal catcher to ensure that temporary files are removed before aborting.
* NB: for Amiga Manx C this is actually a global routine named _abort();
* we put "#define signal_catcher _abort" in jconfig.h. Talk about bogus...
*/
#ifdef NEED_SIGNAL_CATCHER
static j_common_ptr sig_cinfo;
void /* must be global for Manx C */
signal_catcher (int signum)
{
if (sig_cinfo != NULL) {
if (sig_cinfo->err != NULL) /* turn off trace output */
sig_cinfo->err->trace_level = 0;
jpeg_destroy(sig_cinfo); /* clean up memory allocation & temp files */
}
exit(EXIT_FAILURE);
}
GLOBAL(void)
enable_signal_catcher (j_common_ptr cinfo)
{
sig_cinfo = cinfo;
#ifdef SIGINT /* not all systems have SIGINT */
signal(SIGINT, signal_catcher);
#endif
#ifdef SIGTERM /* not all systems have SIGTERM */
signal(SIGTERM, signal_catcher);
#endif
}
#endif
/*
* Optional progress monitor: display a percent-done figure on stderr.
*/
#ifdef PROGRESS_REPORT
METHODDEF(void)
progress_monitor (j_common_ptr cinfo)
{
cd_progress_ptr prog = (cd_progress_ptr) cinfo->progress;
int total_passes = prog->pub.total_passes + prog->total_extra_passes;
int percent_done = (int) (prog->pub.pass_counter*100L/prog->pub.pass_limit);
if (percent_done != prog->percent_done) {
prog->percent_done = percent_done;
if (total_passes > 1) {
fprintf(stderr, "\rPass %d/%d: %3d%% ",
prog->pub.completed_passes + prog->completed_extra_passes + 1,
total_passes, percent_done);
} else {
fprintf(stderr, "\r %3d%% ", percent_done);
}
fflush(stderr);
}
}
GLOBAL(void)
start_progress_monitor (j_common_ptr cinfo, cd_progress_ptr progress)
{
/* Enable progress display, unless trace output is on */
if (cinfo->err->trace_level == 0) {
progress->pub.progress_monitor = progress_monitor;
progress->completed_extra_passes = 0;
progress->total_extra_passes = 0;
progress->percent_done = -1;
cinfo->progress = &progress->pub;
}
}
GLOBAL(void)
end_progress_monitor (j_common_ptr cinfo)
{
/* Clear away progress display */
if (cinfo->err->trace_level == 0) {
fprintf(stderr, "\r \r");
fflush(stderr);
}
}
#endif
/*
* Case-insensitive matching of possibly-abbreviated keyword switches.
* keyword is the constant keyword (must be lower case already),
* minchars is length of minimum legal abbreviation.
*/
GLOBAL(boolean)
keymatch (char * arg, const char * keyword, int minchars)
{
register int ca, ck;
register int nmatched = 0;
while ((ca = *arg++) != '\0') {
if ((ck = *keyword++) == '\0')
return FALSE; /* arg longer than keyword, no good */
if (isupper(ca)) /* force arg to lcase (assume ck is already) */
ca = tolower(ca);
if (ca != ck)
return FALSE; /* no good */
nmatched++; /* count matched characters */
}
/* reached end of argument; fail if it's too short for unique abbrev */
if (nmatched < minchars)
return FALSE;
return TRUE; /* A-OK */
}
/*
* Routines to establish binary I/O mode for stdin and stdout.
* Non-Unix systems often require some hacking to get out of text mode.
*/
GLOBAL(FILE *)
read_stdin (void)
{
FILE * input_file = stdin;
#ifdef USE_SETMODE /* need to hack file mode? */
setmode(fileno(stdin), O_BINARY);
#endif
#ifdef USE_FDOPEN /* need to re-open in binary mode? */
if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
fprintf(stderr, "Cannot reopen stdin\n");
exit(EXIT_FAILURE);
}
#endif
return input_file;
}
GLOBAL(FILE *)
write_stdout (void)
{
FILE * output_file = stdout;
#ifdef USE_SETMODE /* need to hack file mode? */
setmode(fileno(stdout), O_BINARY);
#endif
#ifdef USE_FDOPEN /* need to re-open in binary mode? */
if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
fprintf(stderr, "Cannot reopen stdout\n");
exit(EXIT_FAILURE);
}
#endif
return output_file;
}

217
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CHANGE LOG for Independent JPEG Group's JPEG software
Version 6b 27-Mar-1998
-----------------------
jpegtran has new features for lossless image transformations (rotation
and flipping) as well as "lossless" reduction to grayscale.
jpegtran now copies comments by default; it has a -copy switch to enable
copying all APPn blocks as well, or to suppress comments. (Formerly it
always suppressed comments and APPn blocks.) jpegtran now also preserves
JFIF version and resolution information.
New decompressor library feature: COM and APPn markers found in the input
file can be saved in memory for later use by the application. (Before,
you had to code this up yourself with a custom marker processor.)
There is an unused field "void * client_data" now in compress and decompress
parameter structs; this may be useful in some applications.
JFIF version number information is now saved by the decoder and accepted by
the encoder. jpegtran uses this to copy the source file's version number,
to ensure "jpegtran -copy all" won't create bogus files that contain JFXX
extensions but claim to be version 1.01. Applications that generate their
own JFXX extension markers also (finally) have a supported way to cause the
encoder to emit JFIF version number 1.02.
djpeg's trace mode reports JFIF 1.02 thumbnail images as such, rather
than as unknown APP0 markers.
In -verbose mode, djpeg and rdjpgcom will try to print the contents of
APP12 markers as text. Some digital cameras store useful text information
in APP12 markers.
Handling of truncated data streams is more robust: blocks beyond the one in
which the error occurs will be output as uniform gray, or left unchanged
if decoding a progressive JPEG. The appearance no longer depends on the
Huffman tables being used.
Huffman tables are checked for validity much more carefully than before.
To avoid the Unisys LZW patent, djpeg's GIF output capability has been
changed to produce "uncompressed GIFs", and cjpeg's GIF input capability
has been removed altogether. We're not happy about it either, but there
seems to be no good alternative.
The configure script now supports building libjpeg as a shared library
on many flavors of Unix (all the ones that GNU libtool knows how to
build shared libraries for). Use "./configure --enable-shared" to
try this out.
New jconfig file and makefiles for Microsoft Visual C++ and Developer Studio.
Also, a jconfig file and a build script for Metrowerks CodeWarrior
on Apple Macintosh. makefile.dj has been updated for DJGPP v2, and there
are miscellaneous other minor improvements in the makefiles.
jmemmac.c now knows how to create temporary files following Mac System 7
conventions.
djpeg's -map switch is now able to read raw-format PPM files reliably.
cjpeg -progressive -restart no longer generates any unnecessary DRI markers.
Multiple calls to jpeg_simple_progression for a single JPEG object
no longer leak memory.
Version 6a 7-Feb-96
--------------------
Library initialization sequence modified to detect version mismatches
and struct field packing mismatches between library and calling application.
This change requires applications to be recompiled, but does not require
any application source code change.
All routine declarations changed to the style "GLOBAL(type) name ...",
that is, GLOBAL, LOCAL, METHODDEF, EXTERN are now macros taking the
routine's return type as an argument. This makes it possible to add
Microsoft-style linkage keywords to all the routines by changing just
these macros. Note that any application code that was using these macros
will have to be changed.
DCT coefficient quantization tables are now stored in normal array order
rather than zigzag order. Application code that calls jpeg_add_quant_table,
or otherwise manipulates quantization tables directly, will need to be
changed. If you need to make such code work with either older or newer
versions of the library, a test like "#if JPEG_LIB_VERSION >= 61" is
recommended.
djpeg's trace capability now dumps DQT tables in natural order, not zigzag
order. This allows the trace output to be made into a "-qtables" file
more easily.
New system-dependent memory manager module for use on Apple Macintosh.
Fix bug in cjpeg's -smooth option: last one or two scanlines would be
duplicates of the prior line unless the image height mod 16 was 1 or 2.
Repair minor problems in VMS, BCC, MC6 makefiles.
New configure script based on latest GNU Autoconf.
Correct the list of include files needed by MetroWerks C for ccommand().
Numerous small documentation updates.
Version 6 2-Aug-95
-------------------
Progressive JPEG support: library can read and write full progressive JPEG
files. A "buffered image" mode supports incremental decoding for on-the-fly
display of progressive images. Simply recompiling an existing IJG-v5-based
decoder with v6 should allow it to read progressive files, though of course
without any special progressive display.
New "jpegtran" application performs lossless transcoding between different
JPEG formats; primarily, it can be used to convert baseline to progressive
JPEG and vice versa. In support of jpegtran, the library now allows lossless
reading and writing of JPEG files as DCT coefficient arrays. This ability
may be of use in other applications.
Notes for programmers:
* We changed jpeg_start_decompress() to be able to suspend; this makes all
decoding modes available to suspending-input applications. However,
existing applications that use suspending input will need to be changed
to check the return value from jpeg_start_decompress(). You don't need to
do anything if you don't use a suspending data source.
* We changed the interface to the virtual array routines: access_virt_array
routines now take a count of the number of rows to access this time. The
last parameter to request_virt_array routines is now interpreted as the
maximum number of rows that may be accessed at once, but not necessarily
the height of every access.
Version 5b 15-Mar-95
---------------------
Correct bugs with grayscale images having v_samp_factor > 1.
jpeg_write_raw_data() now supports output suspension.
Correct bugs in "configure" script for case of compiling in
a directory other than the one containing the source files.
Repair bug in jquant1.c: sometimes didn't use as many colors as it could.
Borland C makefile and jconfig file work under either MS-DOS or OS/2.
Miscellaneous improvements to documentation.
Version 5a 7-Dec-94
--------------------
Changed color conversion roundoff behavior so that grayscale values are
represented exactly. (This causes test image files to change.)
Make ordered dither use 16x16 instead of 4x4 pattern for a small quality
improvement.
New configure script based on latest GNU Autoconf.
Fix configure script to handle CFLAGS correctly.
Rename *.auto files to *.cfg, so that configure script still works if
file names have been truncated for DOS.
Fix bug in rdbmp.c: didn't allow for extra data between header and image.
Modify rdppm.c/wrppm.c to handle 2-byte raw PPM/PGM formats for 12-bit data.
Fix several bugs in rdrle.c.
NEED_SHORT_EXTERNAL_NAMES option was broken.
Revise jerror.h/jerror.c for more flexibility in message table.
Repair oversight in jmemname.c NO_MKTEMP case: file could be there
but unreadable.
Version 5 24-Sep-94
--------------------
Version 5 represents a nearly complete redesign and rewrite of the IJG
software. Major user-visible changes include:
* Automatic configuration simplifies installation for most Unix systems.
* A range of speed vs. image quality tradeoffs are supported.
This includes resizing of an image during decompression: scaling down
by a factor of 1/2, 1/4, or 1/8 is handled very efficiently.
* New programs rdjpgcom and wrjpgcom allow insertion and extraction
of text comments in a JPEG file.
The application programmer's interface to the library has changed completely.
Notable improvements include:
* We have eliminated the use of callback routines for handling the
uncompressed image data. The application now sees the library as a
set of routines that it calls to read or write image data on a
scanline-by-scanline basis.
* The application image data is represented in a conventional interleaved-
pixel format, rather than as a separate array for each color channel.
This can save a copying step in many programs.
* The handling of compressed data has been cleaned up: the application can
supply routines to source or sink the compressed data. It is possible to
suspend processing on source/sink buffer overrun, although this is not
supported in all operating modes.
* All static state has been eliminated from the library, so that multiple
instances of compression or decompression can be active concurrently.
* JPEG abbreviated datastream formats are supported, ie, quantization and
Huffman tables can be stored separately from the image data.
* And not only that, but the documentation of the library has improved
considerably!
The last widely used release before the version 5 rewrite was version 4A of
18-Feb-93. Change logs before that point have been discarded, since they
are not of much interest after the rewrite.

292
src/3rdparty/src/jpeg-6b/cjpeg.1 vendored
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.TH CJPEG 1 "20 March 1998"
.SH NAME
cjpeg \- compress an image file to a JPEG file
.SH SYNOPSIS
.B cjpeg
[
.I options
]
[
.I filename
]
.LP
.SH DESCRIPTION
.LP
.B cjpeg
compresses the named image file, or the standard input if no file is
named, and produces a JPEG/JFIF file on the standard output.
The currently supported input file formats are: PPM (PBMPLUS color
format), PGM (PBMPLUS gray-scale format), BMP, Targa, and RLE (Utah Raster
Toolkit format). (RLE is supported only if the URT library is available.)
.SH OPTIONS
All switch names may be abbreviated; for example,
.B \-grayscale
may be written
.B \-gray
or
.BR \-gr .
Most of the "basic" switches can be abbreviated to as little as one letter.
Upper and lower case are equivalent (thus
.B \-BMP
is the same as
.BR \-bmp ).
British spellings are also accepted (e.g.,
.BR \-greyscale ),
though for brevity these are not mentioned below.
.PP
The basic switches are:
.TP
.BI \-quality " N"
Scale quantization tables to adjust image quality. Quality is 0 (worst) to
100 (best); default is 75. (See below for more info.)
.TP
.B \-grayscale
Create monochrome JPEG file from color input. Be sure to use this switch when
compressing a grayscale BMP file, because
.B cjpeg
isn't bright enough to notice whether a BMP file uses only shades of gray.
By saying
.BR \-grayscale ,
you'll get a smaller JPEG file that takes less time to process.
.TP
.B \-optimize
Perform optimization of entropy encoding parameters. Without this, default
encoding parameters are used.
.B \-optimize
usually makes the JPEG file a little smaller, but
.B cjpeg
runs somewhat slower and needs much more memory. Image quality and speed of
decompression are unaffected by
.BR \-optimize .
.TP
.B \-progressive
Create progressive JPEG file (see below).
.TP
.B \-targa
Input file is Targa format. Targa files that contain an "identification"
field will not be automatically recognized by
.BR cjpeg ;
for such files you must specify
.B \-targa
to make
.B cjpeg
treat the input as Targa format.
For most Targa files, you won't need this switch.
.PP
The
.B \-quality
switch lets you trade off compressed file size against quality of the
reconstructed image: the higher the quality setting, the larger the JPEG file,
and the closer the output image will be to the original input. Normally you
want to use the lowest quality setting (smallest file) that decompresses into
something visually indistinguishable from the original image. For this
purpose the quality setting should be between 50 and 95; the default of 75 is
often about right. If you see defects at
.B \-quality
75, then go up 5 or 10 counts at a time until you are happy with the output
image. (The optimal setting will vary from one image to another.)
.PP
.B \-quality
100 will generate a quantization table of all 1's, minimizing loss in the
quantization step (but there is still information loss in subsampling, as well
as roundoff error). This setting is mainly of interest for experimental
purposes. Quality values above about 95 are
.B not
recommended for normal use; the compressed file size goes up dramatically for
hardly any gain in output image quality.
.PP
In the other direction, quality values below 50 will produce very small files
of low image quality. Settings around 5 to 10 might be useful in preparing an
index of a large image library, for example. Try
.B \-quality
2 (or so) for some amusing Cubist effects. (Note: quality
values below about 25 generate 2-byte quantization tables, which are
considered optional in the JPEG standard.
.B cjpeg
emits a warning message when you give such a quality value, because some
other JPEG programs may be unable to decode the resulting file. Use
.B \-baseline
if you need to ensure compatibility at low quality values.)
.PP
The
.B \-progressive
switch creates a "progressive JPEG" file. In this type of JPEG file, the data
is stored in multiple scans of increasing quality. If the file is being
transmitted over a slow communications link, the decoder can use the first
scan to display a low-quality image very quickly, and can then improve the
display with each subsequent scan. The final image is exactly equivalent to a
standard JPEG file of the same quality setting, and the total file size is
about the same --- often a little smaller.
.B Caution:
progressive JPEG is not yet widely implemented, so many decoders will be
unable to view a progressive JPEG file at all.
.PP
Switches for advanced users:
.TP
.B \-dct int
Use integer DCT method (default).
.TP
.B \-dct fast
Use fast integer DCT (less accurate).
.TP
.B \-dct float
Use floating-point DCT method.
The float method is very slightly more accurate than the int method, but is
much slower unless your machine has very fast floating-point hardware. Also
note that results of the floating-point method may vary slightly across
machines, while the integer methods should give the same results everywhere.
The fast integer method is much less accurate than the other two.
.TP
.BI \-restart " N"
Emit a JPEG restart marker every N MCU rows, or every N MCU blocks if "B" is
attached to the number.
.B \-restart 0
(the default) means no restart markers.
.TP
.BI \-smooth " N"
Smooth the input image to eliminate dithering noise. N, ranging from 1 to
100, indicates the strength of smoothing. 0 (the default) means no smoothing.
.TP
.BI \-maxmemory " N"
Set limit for amount of memory to use in processing large images. Value is
in thousands of bytes, or millions of bytes if "M" is attached to the
number. For example,
.B \-max 4m
selects 4000000 bytes. If more space is needed, temporary files will be used.
.TP
.BI \-outfile " name"
Send output image to the named file, not to standard output.
.TP
.B \-verbose
Enable debug printout. More
.BR \-v 's
give more output. Also, version information is printed at startup.
.TP
.B \-debug
Same as
.BR \-verbose .
.PP
The
.B \-restart
option inserts extra markers that allow a JPEG decoder to resynchronize after
a transmission error. Without restart markers, any damage to a compressed
file will usually ruin the image from the point of the error to the end of the
image; with restart markers, the damage is usually confined to the portion of
the image up to the next restart marker. Of course, the restart markers
occupy extra space. We recommend
.B \-restart 1
for images that will be transmitted across unreliable networks such as Usenet.
.PP
The
.B \-smooth
option filters the input to eliminate fine-scale noise. This is often useful
when converting dithered images to JPEG: a moderate smoothing factor of 10 to
50 gets rid of dithering patterns in the input file, resulting in a smaller
JPEG file and a better-looking image. Too large a smoothing factor will
visibly blur the image, however.
.PP
Switches for wizards:
.TP
.B \-baseline
Force baseline-compatible quantization tables to be generated. This clamps
quantization values to 8 bits even at low quality settings. (This switch is
poorly named, since it does not ensure that the output is actually baseline
JPEG. For example, you can use
.B \-baseline
and
.B \-progressive
together.)
.TP
.BI \-qtables " file"
Use the quantization tables given in the specified text file.
.TP
.BI \-qslots " N[,...]"
Select which quantization table to use for each color component.
.TP
.BI \-sample " HxV[,...]"
Set JPEG sampling factors for each color component.
.TP
.BI \-scans " file"
Use the scan script given in the specified text file.
.PP
The "wizard" switches are intended for experimentation with JPEG. If you
don't know what you are doing, \fBdon't use them\fR. These switches are
documented further in the file wizard.doc.
.SH EXAMPLES
.LP
This example compresses the PPM file foo.ppm with a quality factor of
60 and saves the output as foo.jpg:
.IP
.B cjpeg \-quality
.I 60 foo.ppm
.B >
.I foo.jpg
.SH HINTS
Color GIF files are not the ideal input for JPEG; JPEG is really intended for
compressing full-color (24-bit) images. In particular, don't try to convert
cartoons, line drawings, and other images that have only a few distinct
colors. GIF works great on these, JPEG does not. If you want to convert a
GIF to JPEG, you should experiment with
.BR cjpeg 's
.B \-quality
and
.B \-smooth
options to get a satisfactory conversion.
.B \-smooth 10
or so is often helpful.
.PP
Avoid running an image through a series of JPEG compression/decompression
cycles. Image quality loss will accumulate; after ten or so cycles the image
may be noticeably worse than it was after one cycle. It's best to use a
lossless format while manipulating an image, then convert to JPEG format when
you are ready to file the image away.
.PP
The
.B \-optimize
option to
.B cjpeg
is worth using when you are making a "final" version for posting or archiving.
It's also a win when you are using low quality settings to make very small
JPEG files; the percentage improvement is often a lot more than it is on
larger files. (At present,
.B \-optimize
mode is always selected when generating progressive JPEG files.)
.SH ENVIRONMENT
.TP
.B JPEGMEM
If this environment variable is set, its value is the default memory limit.
The value is specified as described for the
.B \-maxmemory
switch.
.B JPEGMEM
overrides the default value specified when the program was compiled, and
itself is overridden by an explicit
.BR \-maxmemory .
.SH SEE ALSO
.BR djpeg (1),
.BR jpegtran (1),
.BR rdjpgcom (1),
.BR wrjpgcom (1)
.br
.BR ppm (5),
.BR pgm (5)
.br
Wallace, Gregory K. "The JPEG Still Picture Compression Standard",
Communications of the ACM, April 1991 (vol. 34, no. 4), pp. 30-44.
.SH AUTHOR
Independent JPEG Group
.SH BUGS
Arithmetic coding is not supported for legal reasons.
.PP
GIF input files are no longer supported, to avoid the Unisys LZW patent.
Use a Unisys-licensed program if you need to read a GIF file. (Conversion
of GIF files to JPEG is usually a bad idea anyway.)
.PP
Not all variants of BMP and Targa file formats are supported.
.PP
The
.B \-targa
switch is not a bug, it's a feature. (It would be a bug if the Targa format
designers had not been clueless.)
.PP
Still not as fast as we'd like.

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/*
* cjpeg.c
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains a command-line user interface for the JPEG compressor.
* It should work on any system with Unix- or MS-DOS-style command lines.
*
* Two different command line styles are permitted, depending on the
* compile-time switch TWO_FILE_COMMANDLINE:
* cjpeg [options] inputfile outputfile
* cjpeg [options] [inputfile]
* In the second style, output is always to standard output, which you'd
* normally redirect to a file or pipe to some other program. Input is
* either from a named file or from standard input (typically redirected).
* The second style is convenient on Unix but is unhelpful on systems that
* don't support pipes. Also, you MUST use the first style if your system
* doesn't do binary I/O to stdin/stdout.
* To simplify script writing, the "-outfile" switch is provided. The syntax
* cjpeg [options] -outfile outputfile inputfile
* works regardless of which command line style is used.
*/
#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
#include "jversion.h" /* for version message */
#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
#ifdef __MWERKS__
#include <SIOUX.h> /* Metrowerks needs this */
#include <console.h> /* ... and this */
#endif
#ifdef THINK_C
#include <console.h> /* Think declares it here */
#endif
#endif
/* Create the add-on message string table. */
#define JMESSAGE(code,string) string ,
static const char * const cdjpeg_message_table[] = {
#include "cderror.h"
NULL
};
/*
* This routine determines what format the input file is,
* and selects the appropriate input-reading module.
*
* To determine which family of input formats the file belongs to,
* we may look only at the first byte of the file, since C does not
* guarantee that more than one character can be pushed back with ungetc.
* Looking at additional bytes would require one of these approaches:
* 1) assume we can fseek() the input file (fails for piped input);
* 2) assume we can push back more than one character (works in
* some C implementations, but unportable);
* 3) provide our own buffering (breaks input readers that want to use
* stdio directly, such as the RLE library);
* or 4) don't put back the data, and modify the input_init methods to assume
* they start reading after the start of file (also breaks RLE library).
* #1 is attractive for MS-DOS but is untenable on Unix.
*
* The most portable solution for file types that can't be identified by their
* first byte is to make the user tell us what they are. This is also the
* only approach for "raw" file types that contain only arbitrary values.
* We presently apply this method for Targa files. Most of the time Targa
* files start with 0x00, so we recognize that case. Potentially, however,
* a Targa file could start with any byte value (byte 0 is the length of the
* seldom-used ID field), so we provide a switch to force Targa input mode.
*/
static boolean is_targa; /* records user -targa switch */
LOCAL(cjpeg_source_ptr)
select_file_type (j_compress_ptr cinfo, FILE * infile)
{
int c;
if (is_targa) {
#ifdef TARGA_SUPPORTED
return jinit_read_targa(cinfo);
#else
ERREXIT(cinfo, JERR_TGA_NOTCOMP);
#endif
}
if ((c = getc(infile)) == EOF)
ERREXIT(cinfo, JERR_INPUT_EMPTY);
if (ungetc(c, infile) == EOF)
ERREXIT(cinfo, JERR_UNGETC_FAILED);
switch (c) {
#ifdef BMP_SUPPORTED
case 'B':
return jinit_read_bmp(cinfo);
#endif
#ifdef GIF_SUPPORTED
case 'G':
return jinit_read_gif(cinfo);
#endif
#ifdef PPM_SUPPORTED
case 'P':
return jinit_read_ppm(cinfo);
#endif
#ifdef RLE_SUPPORTED
case 'R':
return jinit_read_rle(cinfo);
#endif
#ifdef TARGA_SUPPORTED
case 0x00:
return jinit_read_targa(cinfo);
#endif
default:
ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
break;
}
return NULL; /* suppress compiler warnings */
}
/*
* Argument-parsing code.
* The switch parser is designed to be useful with DOS-style command line
* syntax, ie, intermixed switches and file names, where only the switches
* to the left of a given file name affect processing of that file.
* The main program in this file doesn't actually use this capability...
*/
static const char * progname; /* program name for error messages */
static char * outfilename; /* for -outfile switch */
LOCAL(void)
usage (void)
/* complain about bad command line */
{
fprintf(stderr, "usage: %s [switches] ", progname);
#ifdef TWO_FILE_COMMANDLINE
fprintf(stderr, "inputfile outputfile\n");
#else
fprintf(stderr, "[inputfile]\n");
#endif
fprintf(stderr, "Switches (names may be abbreviated):\n");
fprintf(stderr, " -quality N Compression quality (0..100; 5-95 is useful range)\n");
fprintf(stderr, " -grayscale Create monochrome JPEG file\n");
#ifdef ENTROPY_OPT_SUPPORTED
fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
#endif
#ifdef C_PROGRESSIVE_SUPPORTED
fprintf(stderr, " -progressive Create progressive JPEG file\n");
#endif
#ifdef TARGA_SUPPORTED
fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n");
#endif
fprintf(stderr, "Switches for advanced users:\n");
#ifdef DCT_ISLOW_SUPPORTED
fprintf(stderr, " -dct int Use integer DCT method%s\n",
(JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
#endif
#ifdef DCT_IFAST_SUPPORTED
fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
(JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
#endif
#ifdef DCT_FLOAT_SUPPORTED
fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
(JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
#endif
fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
#ifdef INPUT_SMOOTHING_SUPPORTED
fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\n");
#endif
fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
fprintf(stderr, " -outfile name Specify name for output file\n");
fprintf(stderr, " -verbose or -debug Emit debug output\n");
fprintf(stderr, "Switches for wizards:\n");
#ifdef C_ARITH_CODING_SUPPORTED
fprintf(stderr, " -arithmetic Use arithmetic coding\n");
#endif
fprintf(stderr, " -baseline Force baseline quantization tables\n");
fprintf(stderr, " -qtables file Use quantization tables given in file\n");
fprintf(stderr, " -qslots N[,...] Set component quantization tables\n");
fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n");
#ifdef C_MULTISCAN_FILES_SUPPORTED
fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
#endif
exit(EXIT_FAILURE);
}
LOCAL(int)
parse_switches (j_compress_ptr cinfo, int argc, char **argv,
int last_file_arg_seen, boolean for_real)
/* Parse optional switches.
* Returns argv[] index of first file-name argument (== argc if none).
* Any file names with indexes <= last_file_arg_seen are ignored;
* they have presumably been processed in a previous iteration.
* (Pass 0 for last_file_arg_seen on the first or only iteration.)
* for_real is FALSE on the first (dummy) pass; we may skip any expensive
* processing.
*/
{
int argn;
char * arg;
int quality; /* -quality parameter */
int q_scale_factor; /* scaling percentage for -qtables */
boolean force_baseline;
boolean simple_progressive;
char * qtablefile = NULL; /* saves -qtables filename if any */
char * qslotsarg = NULL; /* saves -qslots parm if any */
char * samplearg = NULL; /* saves -sample parm if any */
char * scansarg = NULL; /* saves -scans parm if any */
/* Set up default JPEG parameters. */
/* Note that default -quality level need not, and does not,
* match the default scaling for an explicit -qtables argument.
*/
quality = 75; /* default -quality value */
q_scale_factor = 100; /* default to no scaling for -qtables */
force_baseline = FALSE; /* by default, allow 16-bit quantizers */
simple_progressive = FALSE;
is_targa = FALSE;
outfilename = NULL;
cinfo->err->trace_level = 0;
/* Scan command line options, adjust parameters */
for (argn = 1; argn < argc; argn++) {
arg = argv[argn];
if (*arg != '-') {
/* Not a switch, must be a file name argument */
if (argn <= last_file_arg_seen) {
outfilename = NULL; /* -outfile applies to just one input file */
continue; /* ignore this name if previously processed */
}
break; /* else done parsing switches */
}
arg++; /* advance past switch marker character */
if (keymatch(arg, "arithmetic", 1)) {
/* Use arithmetic coding. */
#ifdef C_ARITH_CODING_SUPPORTED
cinfo->arith_code = TRUE;
#else
fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
progname);
exit(EXIT_FAILURE);
#endif
} else if (keymatch(arg, "baseline", 1)) {
/* Force baseline-compatible output (8-bit quantizer values). */
force_baseline = TRUE;
} else if (keymatch(arg, "dct", 2)) {
/* Select DCT algorithm. */
if (++argn >= argc) /* advance to next argument */
usage();
if (keymatch(argv[argn], "int", 1)) {
cinfo->dct_method = JDCT_ISLOW;
} else if (keymatch(argv[argn], "fast", 2)) {
cinfo->dct_method = JDCT_IFAST;
} else if (keymatch(argv[argn], "float", 2)) {
cinfo->dct_method = JDCT_FLOAT;
} else
usage();
} else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
/* Enable debug printouts. */
/* On first -d, print version identification */
static boolean printed_version = FALSE;
if (! printed_version) {
fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",
JVERSION, JCOPYRIGHT);
printed_version = TRUE;
}
cinfo->err->trace_level++;
} else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
/* Force a monochrome JPEG file to be generated. */
jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
} else if (keymatch(arg, "maxmemory", 3)) {
/* Maximum memory in Kb (or Mb with 'm'). */
long lval;
char ch = 'x';
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
usage();
if (ch == 'm' || ch == 'M')
lval *= 1000L;
cinfo->mem->max_memory_to_use = lval * 1000L;
} else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
/* Enable entropy parm optimization. */
#ifdef ENTROPY_OPT_SUPPORTED
cinfo->optimize_coding = TRUE;
#else
fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
progname);
exit(EXIT_FAILURE);
#endif
} else if (keymatch(arg, "outfile", 4)) {
/* Set output file name. */
if (++argn >= argc) /* advance to next argument */
usage();
outfilename = argv[argn]; /* save it away for later use */
} else if (keymatch(arg, "progressive", 1)) {
/* Select simple progressive mode. */
#ifdef C_PROGRESSIVE_SUPPORTED
simple_progressive = TRUE;
/* We must postpone execution until num_components is known. */
#else
fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
progname);
exit(EXIT_FAILURE);
#endif
} else if (keymatch(arg, "quality", 1)) {
/* Quality factor (quantization table scaling factor). */
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%d", &quality) != 1)
usage();
/* Change scale factor in case -qtables is present. */
q_scale_factor = jpeg_quality_scaling(quality);
} else if (keymatch(arg, "qslots", 2)) {
/* Quantization table slot numbers. */
if (++argn >= argc) /* advance to next argument */
usage();
qslotsarg = argv[argn];
/* Must delay setting qslots until after we have processed any
* colorspace-determining switches, since jpeg_set_colorspace sets
* default quant table numbers.
*/
} else if (keymatch(arg, "qtables", 2)) {
/* Quantization tables fetched from file. */
if (++argn >= argc) /* advance to next argument */
usage();
qtablefile = argv[argn];
/* We postpone actually reading the file in case -quality comes later. */
} else if (keymatch(arg, "restart", 1)) {
/* Restart interval in MCU rows (or in MCUs with 'b'). */
long lval;
char ch = 'x';
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
usage();
if (lval < 0 || lval > 65535L)
usage();
if (ch == 'b' || ch == 'B') {
cinfo->restart_interval = (unsigned int) lval;
cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
} else {
cinfo->restart_in_rows = (int) lval;
/* restart_interval will be computed during startup */
}
} else if (keymatch(arg, "sample", 2)) {
/* Set sampling factors. */
if (++argn >= argc) /* advance to next argument */
usage();
samplearg = argv[argn];
/* Must delay setting sample factors until after we have processed any
* colorspace-determining switches, since jpeg_set_colorspace sets
* default sampling factors.
*/
} else if (keymatch(arg, "scans", 2)) {
/* Set scan script. */
#ifdef C_MULTISCAN_FILES_SUPPORTED
if (++argn >= argc) /* advance to next argument */
usage();
scansarg = argv[argn];
/* We must postpone reading the file in case -progressive appears. */
#else
fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
progname);
exit(EXIT_FAILURE);
#endif
} else if (keymatch(arg, "smooth", 2)) {
/* Set input smoothing factor. */
int val;
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%d", &val) != 1)
usage();
if (val < 0 || val > 100)
usage();
cinfo->smoothing_factor = val;
} else if (keymatch(arg, "targa", 1)) {
/* Input file is Targa format. */
is_targa = TRUE;
} else {
usage(); /* bogus switch */
}
}
/* Post-switch-scanning cleanup */
if (for_real) {
/* Set quantization tables for selected quality. */
/* Some or all may be overridden if -qtables is present. */
jpeg_set_quality(cinfo, quality, force_baseline);
if (qtablefile != NULL) /* process -qtables if it was present */
if (! read_quant_tables(cinfo, qtablefile,
q_scale_factor, force_baseline))
usage();
if (qslotsarg != NULL) /* process -qslots if it was present */
if (! set_quant_slots(cinfo, qslotsarg))
usage();
if (samplearg != NULL) /* process -sample if it was present */
if (! set_sample_factors(cinfo, samplearg))
usage();
#ifdef C_PROGRESSIVE_SUPPORTED
if (simple_progressive) /* process -progressive; -scans can override */
jpeg_simple_progression(cinfo);
#endif
#ifdef C_MULTISCAN_FILES_SUPPORTED
if (scansarg != NULL) /* process -scans if it was present */
if (! read_scan_script(cinfo, scansarg))
usage();
#endif
}
return argn; /* return index of next arg (file name) */
}
/*
* The main program.
*/
int
main (int argc, char **argv)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
#ifdef PROGRESS_REPORT
struct cdjpeg_progress_mgr progress;
#endif
int file_index;
cjpeg_source_ptr src_mgr;
FILE * input_file;
FILE * output_file;
JDIMENSION num_scanlines;
/* On Mac, fetch a command line. */
#ifdef USE_CCOMMAND
argc = ccommand(&argv);
#endif
progname = argv[0];
if (progname == NULL || progname[0] == 0)
progname = "cjpeg"; /* in case C library doesn't provide it */
/* Initialize the JPEG compression object with default error handling. */
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
/* Add some application-specific error messages (from cderror.h) */
jerr.addon_message_table = cdjpeg_message_table;
jerr.first_addon_message = JMSG_FIRSTADDONCODE;
jerr.last_addon_message = JMSG_LASTADDONCODE;
/* Now safe to enable signal catcher. */
#ifdef NEED_SIGNAL_CATCHER
enable_signal_catcher((j_common_ptr) &cinfo);
#endif
/* Initialize JPEG parameters.
* Much of this may be overridden later.
* In particular, we don't yet know the input file's color space,
* but we need to provide some value for jpeg_set_defaults() to work.
*/
cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
jpeg_set_defaults(&cinfo);
/* Scan command line to find file names.
* It is convenient to use just one switch-parsing routine, but the switch
* values read here are ignored; we will rescan the switches after opening
* the input file.
*/
file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
#ifdef TWO_FILE_COMMANDLINE
/* Must have either -outfile switch or explicit output file name */
if (outfilename == NULL) {
if (file_index != argc-2) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
outfilename = argv[file_index+1];
} else {
if (file_index != argc-1) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
}
#else
/* Unix style: expect zero or one file name */
if (file_index < argc-1) {
fprintf(stderr, "%s: only one input file\n", progname);
usage();
}
#endif /* TWO_FILE_COMMANDLINE */
/* Open the input file. */
if (file_index < argc) {
if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
exit(EXIT_FAILURE);
}
} else {
/* default input file is stdin */
input_file = read_stdin();
}
/* Open the output file. */
if (outfilename != NULL) {
if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
exit(EXIT_FAILURE);
}
} else {
/* default output file is stdout */
output_file = write_stdout();
}
#ifdef PROGRESS_REPORT
start_progress_monitor((j_common_ptr) &cinfo, &progress);
#endif
/* Figure out the input file format, and set up to read it. */
src_mgr = select_file_type(&cinfo, input_file);
src_mgr->input_file = input_file;
/* Read the input file header to obtain file size & colorspace. */
(*src_mgr->start_input) (&cinfo, src_mgr);
/* Now that we know input colorspace, fix colorspace-dependent defaults */
jpeg_default_colorspace(&cinfo);
/* Adjust default compression parameters by re-parsing the options */
file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
/* Specify data destination for compression */
jpeg_stdio_dest(&cinfo, output_file);
/* Start compressor */
jpeg_start_compress(&cinfo, TRUE);
/* Process data */
while (cinfo.next_scanline < cinfo.image_height) {
num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
(void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
}
/* Finish compression and release memory */
(*src_mgr->finish_input) (&cinfo, src_mgr);
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
/* Close files, if we opened them */
if (input_file != stdin)
fclose(input_file);
if (output_file != stdout)
fclose(output_file);
#ifdef PROGRESS_REPORT
end_progress_monitor((j_common_ptr) &cinfo);
#endif
/* All done. */
exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
return 0; /* suppress no-return-value warnings */
}

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/*
* ckconfig.c
*
* Copyright (C) 1991-1994, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*/
/*
* This program is intended to help you determine how to configure the JPEG
* software for installation on a particular system. The idea is to try to
* compile and execute this program. If your compiler fails to compile the
* program, make changes as indicated in the comments below. Once you can
* compile the program, run it, and it will produce a "jconfig.h" file for
* your system.
*
* As a general rule, each time you try to compile this program,
* pay attention only to the *first* error message you get from the compiler.
* Many C compilers will issue lots of spurious error messages once they
* have gotten confused. Go to the line indicated in the first error message,
* and read the comments preceding that line to see what to change.
*
* Almost all of the edits you may need to make to this program consist of
* changing a line that reads "#define SOME_SYMBOL" to "#undef SOME_SYMBOL",
* or vice versa. This is called defining or undefining that symbol.
*/
/* First we must see if your system has the include files we need.
* We start out with the assumption that your system has all the ANSI-standard
* include files. If you get any error trying to include one of these files,
* undefine the corresponding HAVE_xxx symbol.
*/
#define HAVE_STDDEF_H /* replace 'define' by 'undef' if error here */
#ifdef HAVE_STDDEF_H /* next line will be skipped if you undef... */
#include <stddef.h>
#endif
#define HAVE_STDLIB_H /* same thing for stdlib.h */
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <stdio.h> /* If you ain't got this, you ain't got C. */
/* We have to see if your string functions are defined by
* strings.h (old BSD convention) or string.h (everybody else).
* We try the non-BSD convention first; define NEED_BSD_STRINGS
* if the compiler says it can't find string.h.
*/
#undef NEED_BSD_STRINGS
#ifdef NEED_BSD_STRINGS
#include <strings.h>
#else
#include <string.h>
#endif
/* On some systems (especially older Unix machines), type size_t is
* defined only in the include file <sys/types.h>. If you get a failure
* on the size_t test below, try defining NEED_SYS_TYPES_H.
*/
#undef NEED_SYS_TYPES_H /* start by assuming we don't need it */
#ifdef NEED_SYS_TYPES_H
#include <sys/types.h>
#endif
/* Usually type size_t is defined in one of the include files we've included
* above. If not, you'll get an error on the "typedef size_t my_size_t;" line.
* In that case, first try defining NEED_SYS_TYPES_H just above.
* If that doesn't work, you'll have to search through your system library
* to figure out which include file defines "size_t". Look for a line that
* says "typedef something-or-other size_t;". Then, change the line below
* that says "#include <someincludefile.h>" to instead include the file
* you found size_t in, and define NEED_SPECIAL_INCLUDE. If you can't find
* type size_t anywhere, try replacing "#include <someincludefile.h>" with
* "typedef unsigned int size_t;".
*/
#undef NEED_SPECIAL_INCLUDE /* assume we DON'T need it, for starters */
#ifdef NEED_SPECIAL_INCLUDE
#include <someincludefile.h>
#endif
typedef size_t my_size_t; /* The payoff: do we have size_t now? */
/* The next question is whether your compiler supports ANSI-style function
* prototypes. You need to know this in order to choose between using
* makefile.ansi and using makefile.unix.
* The #define line below is set to assume you have ANSI function prototypes.
* If you get an error in this group of lines, undefine HAVE_PROTOTYPES.
*/
#define HAVE_PROTOTYPES
#ifdef HAVE_PROTOTYPES
int testfunction (int arg1, int * arg2); /* check prototypes */
struct methods_struct { /* check method-pointer declarations */
int (*error_exit) (char *msgtext);
int (*trace_message) (char *msgtext);
int (*another_method) (void);
};
int testfunction (int arg1, int * arg2) /* check definitions */
{
return arg2[arg1];
}
int test2function (void) /* check void arg list */
{
return 0;
}
#endif
/* Now we want to find out if your compiler knows what "unsigned char" means.
* If you get an error on the "unsigned char un_char;" line,
* then undefine HAVE_UNSIGNED_CHAR.
*/
#define HAVE_UNSIGNED_CHAR
#ifdef HAVE_UNSIGNED_CHAR
unsigned char un_char;
#endif
/* Now we want to find out if your compiler knows what "unsigned short" means.
* If you get an error on the "unsigned short un_short;" line,
* then undefine HAVE_UNSIGNED_SHORT.
*/
#define HAVE_UNSIGNED_SHORT
#ifdef HAVE_UNSIGNED_SHORT
unsigned short un_short;
#endif
/* Now we want to find out if your compiler understands type "void".
* If you get an error anywhere in here, undefine HAVE_VOID.
*/
#define HAVE_VOID
#ifdef HAVE_VOID
/* Caution: a C++ compiler will insist on complete prototypes */
typedef void * void_ptr; /* check void * */
#ifdef HAVE_PROTOTYPES /* check ptr to function returning void */
typedef void (*void_func) (int a, int b);
#else
typedef void (*void_func) ();
#endif
#ifdef HAVE_PROTOTYPES /* check void function result */
void test3function (void_ptr arg1, void_func arg2)
#else
void test3function (arg1, arg2)
void_ptr arg1;
void_func arg2;
#endif
{
char * locptr = (char *) arg1; /* check casting to and from void * */
arg1 = (void *) locptr;
(*arg2) (1, 2); /* check call of fcn returning void */
}
#endif
/* Now we want to find out if your compiler knows what "const" means.
* If you get an error here, undefine HAVE_CONST.
*/
#define HAVE_CONST
#ifdef HAVE_CONST
static const int carray[3] = {1, 2, 3};
#ifdef HAVE_PROTOTYPES
int test4function (const int arg1)
#else
int test4function (arg1)
const int arg1;
#endif
{
return carray[arg1];
}
#endif
/* If you get an error or warning about this structure definition,
* define INCOMPLETE_TYPES_BROKEN.
*/
#undef INCOMPLETE_TYPES_BROKEN
#ifndef INCOMPLETE_TYPES_BROKEN
typedef struct undefined_structure * undef_struct_ptr;
#endif
/* If you get an error about duplicate names,
* define NEED_SHORT_EXTERNAL_NAMES.
*/
#undef NEED_SHORT_EXTERNAL_NAMES
#ifndef NEED_SHORT_EXTERNAL_NAMES
int possibly_duplicate_function ()
{
return 0;
}
int possibly_dupli_function ()
{
return 1;
}
#endif
/************************************************************************
* OK, that's it. You should not have to change anything beyond this
* point in order to compile and execute this program. (You might get
* some warnings, but you can ignore them.)
* When you run the program, it will make a couple more tests that it
* can do automatically, and then it will create jconfig.h and print out
* any additional suggestions it has.
************************************************************************
*/
#ifdef HAVE_PROTOTYPES
int is_char_signed (int arg)
#else
int is_char_signed (arg)
int arg;
#endif
{
if (arg == 189) { /* expected result for unsigned char */
return 0; /* type char is unsigned */
}
else if (arg != -67) { /* expected result for signed char */
printf("Hmm, it seems 'char' is not eight bits wide on your machine.\n");
printf("I fear the JPEG software will not work at all.\n\n");
}
return 1; /* assume char is signed otherwise */
}
#ifdef HAVE_PROTOTYPES
int is_shifting_signed (long arg)
#else
int is_shifting_signed (arg)
long arg;
#endif
/* See whether right-shift on a long is signed or not. */
{
long res = arg >> 4;
if (res == -0x7F7E80CL) { /* expected result for signed shift */
return 1; /* right shift is signed */
}
/* see if unsigned-shift hack will fix it. */
/* we can't just test exact value since it depends on width of long... */
res |= (~0L) << (32-4);
if (res == -0x7F7E80CL) { /* expected result now? */
return 0; /* right shift is unsigned */
}
printf("Right shift isn't acting as I expect it to.\n");
printf("I fear the JPEG software will not work at all.\n\n");
return 0; /* try it with unsigned anyway */
}
#ifdef HAVE_PROTOTYPES
int main (int argc, char ** argv)
#else
int main (argc, argv)
int argc;
char ** argv;
#endif
{
char signed_char_check = (char) (-67);
FILE *outfile;
/* Attempt to write jconfig.h */
if ((outfile = fopen("jconfig.h", "w")) == NULL) {
printf("Failed to write jconfig.h\n");
return 1;
}
/* Write out all the info */
fprintf(outfile, "/* jconfig.h --- generated by ckconfig.c */\n");
fprintf(outfile, "/* see jconfig.doc for explanations */\n\n");
#ifdef HAVE_PROTOTYPES
fprintf(outfile, "#define HAVE_PROTOTYPES\n");
#else
fprintf(outfile, "#undef HAVE_PROTOTYPES\n");
#endif
#ifdef HAVE_UNSIGNED_CHAR
fprintf(outfile, "#define HAVE_UNSIGNED_CHAR\n");
#else
fprintf(outfile, "#undef HAVE_UNSIGNED_CHAR\n");
#endif
#ifdef HAVE_UNSIGNED_SHORT
fprintf(outfile, "#define HAVE_UNSIGNED_SHORT\n");
#else
fprintf(outfile, "#undef HAVE_UNSIGNED_SHORT\n");
#endif
#ifdef HAVE_VOID
fprintf(outfile, "/* #define void char */\n");
#else
fprintf(outfile, "#define void char\n");
#endif
#ifdef HAVE_CONST
fprintf(outfile, "/* #define const */\n");
#else
fprintf(outfile, "#define const\n");
#endif
if (is_char_signed((int) signed_char_check))
fprintf(outfile, "#undef CHAR_IS_UNSIGNED\n");
else
fprintf(outfile, "#define CHAR_IS_UNSIGNED\n");
#ifdef HAVE_STDDEF_H
fprintf(outfile, "#define HAVE_STDDEF_H\n");
#else
fprintf(outfile, "#undef HAVE_STDDEF_H\n");
#endif
#ifdef HAVE_STDLIB_H
fprintf(outfile, "#define HAVE_STDLIB_H\n");
#else
fprintf(outfile, "#undef HAVE_STDLIB_H\n");
#endif
#ifdef NEED_BSD_STRINGS
fprintf(outfile, "#define NEED_BSD_STRINGS\n");
#else
fprintf(outfile, "#undef NEED_BSD_STRINGS\n");
#endif
#ifdef NEED_SYS_TYPES_H
fprintf(outfile, "#define NEED_SYS_TYPES_H\n");
#else
fprintf(outfile, "#undef NEED_SYS_TYPES_H\n");
#endif
fprintf(outfile, "#undef NEED_FAR_POINTERS\n");
#ifdef NEED_SHORT_EXTERNAL_NAMES
fprintf(outfile, "#define NEED_SHORT_EXTERNAL_NAMES\n");
#else
fprintf(outfile, "#undef NEED_SHORT_EXTERNAL_NAMES\n");
#endif
#ifdef INCOMPLETE_TYPES_BROKEN
fprintf(outfile, "#define INCOMPLETE_TYPES_BROKEN\n");
#else
fprintf(outfile, "#undef INCOMPLETE_TYPES_BROKEN\n");
#endif
fprintf(outfile, "\n#ifdef JPEG_INTERNALS\n\n");
if (is_shifting_signed(-0x7F7E80B1L))
fprintf(outfile, "#undef RIGHT_SHIFT_IS_UNSIGNED\n");
else
fprintf(outfile, "#define RIGHT_SHIFT_IS_UNSIGNED\n");
fprintf(outfile, "\n#endif /* JPEG_INTERNALS */\n");
fprintf(outfile, "\n#ifdef JPEG_CJPEG_DJPEG\n\n");
fprintf(outfile, "#define BMP_SUPPORTED /* BMP image file format */\n");
fprintf(outfile, "#define GIF_SUPPORTED /* GIF image file format */\n");
fprintf(outfile, "#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */\n");
fprintf(outfile, "#undef RLE_SUPPORTED /* Utah RLE image file format */\n");
fprintf(outfile, "#define TARGA_SUPPORTED /* Targa image file format */\n\n");
fprintf(outfile, "#undef TWO_FILE_COMMANDLINE /* You may need this on non-Unix systems */\n");
fprintf(outfile, "#undef NEED_SIGNAL_CATCHER /* Define this if you use jmemname.c */\n");
fprintf(outfile, "#undef DONT_USE_B_MODE\n");
fprintf(outfile, "/* #define PROGRESS_REPORT */ /* optional */\n");
fprintf(outfile, "\n#endif /* JPEG_CJPEG_DJPEG */\n");
/* Close the jconfig.h file */
fclose(outfile);
/* User report */
printf("Configuration check for Independent JPEG Group's software done.\n");
printf("\nI have written the jconfig.h file for you.\n\n");
#ifdef HAVE_PROTOTYPES
printf("You should use makefile.ansi as the starting point for your Makefile.\n");
#else
printf("You should use makefile.unix as the starting point for your Makefile.\n");
#endif
#ifdef NEED_SPECIAL_INCLUDE
printf("\nYou'll need to change jconfig.h to include the system include file\n");
printf("that you found type size_t in, or add a direct definition of type\n");
printf("size_t if that's what you used. Just add it to the end.\n");
#endif
return 0;
}

118
src/3rdparty/src/jpeg-6b/coderules.doc vendored
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@ -1,118 +0,0 @@
IJG JPEG LIBRARY: CODING RULES
Copyright (C) 1991-1996, Thomas G. Lane.
This file is part of the Independent JPEG Group's software.
For conditions of distribution and use, see the accompanying README file.
Since numerous people will be contributing code and bug fixes, it's important
to establish a common coding style. The goal of using similar coding styles
is much more important than the details of just what that style is.
In general we follow the recommendations of "Recommended C Style and Coding
Standards" revision 6.1 (Cannon et al. as modified by Spencer, Keppel and
Brader). This document is available in the IJG FTP archive (see
jpeg/doc/cstyle.ms.tbl.Z, or cstyle.txt.Z for those without nroff/tbl).
Block comments should be laid out thusly:
/*
* Block comments in this style.
*/
We indent statements in K&R style, e.g.,
if (test) {
then-part;
} else {
else-part;
}
with two spaces per indentation level. (This indentation convention is
handled automatically by GNU Emacs and many other text editors.)
Multi-word names should be written in lower case with underscores, e.g.,
multi_word_name (not multiWordName). Preprocessor symbols and enum constants
are similar but upper case (MULTI_WORD_NAME). Names should be unique within
the first fifteen characters. (On some older systems, global names must be
unique within six characters. We accommodate this without cluttering the
source code by using macros to substitute shorter names.)
We use function prototypes everywhere; we rely on automatic source code
transformation to feed prototype-less C compilers. Transformation is done
by the simple and portable tool 'ansi2knr.c' (courtesy of Ghostscript).
ansi2knr is not very bright, so it imposes a format requirement on function
declarations: the function name MUST BEGIN IN COLUMN 1. Thus all functions
should be written in the following style:
LOCAL(int *)
function_name (int a, char *b)
{
code...
}
Note that each function definition must begin with GLOBAL(type), LOCAL(type),
or METHODDEF(type). These macros expand to "static type" or just "type" as
appropriate. They provide a readable indication of the routine's usage and
can readily be changed for special needs. (For instance, special linkage
keywords can be inserted for use in Windows DLLs.)
ansi2knr does not transform method declarations (function pointers in
structs). We handle these with a macro JMETHOD, defined as
#ifdef HAVE_PROTOTYPES
#define JMETHOD(type,methodname,arglist) type (*methodname) arglist
#else
#define JMETHOD(type,methodname,arglist) type (*methodname) ()
#endif
which is used like this:
struct function_pointers {
JMETHOD(void, init_entropy_encoder, (int somearg, jparms *jp));
JMETHOD(void, term_entropy_encoder, (void));
};
Note the set of parentheses surrounding the parameter list.
A similar solution is used for forward and external function declarations
(see the EXTERN and JPP macros).
If the code is to work on non-ANSI compilers, we cannot rely on a prototype
declaration to coerce actual parameters into the right types. Therefore, use
explicit casts on actual parameters whenever the actual parameter type is not
identical to the formal parameter. Beware of implicit conversions to "int".
It seems there are some non-ANSI compilers in which the sizeof() operator
is defined to return int, yet size_t is defined as long. Needless to say,
this is brain-damaged. Always use the SIZEOF() macro in place of sizeof(),
so that the result is guaranteed to be of type size_t.
The JPEG library is intended to be used within larger programs. Furthermore,
we want it to be reentrant so that it can be used by applications that process
multiple images concurrently. The following rules support these requirements:
1. Avoid direct use of file I/O, "malloc", error report printouts, etc;
pass these through the common routines provided.
2. Minimize global namespace pollution. Functions should be declared static
wherever possible. (Note that our method-based calling conventions help this
a lot: in many modules only the initialization function will ever need to be
called directly, so only that function need be externally visible.) All
global function names should begin with "jpeg_", and should have an
abbreviated name (unique in the first six characters) substituted by macro
when NEED_SHORT_EXTERNAL_NAMES is set.
3. Don't use global variables; anything that must be used in another module
should be in the common data structures.
4. Don't use static variables except for read-only constant tables. Variables
that should be private to a module can be placed into private structures (see
the system architecture document, structure.doc).
5. Source file names should begin with "j" for files that are part of the
library proper; source files that are not part of the library, such as cjpeg.c
and djpeg.c, do not begin with "j". Keep source file names to eight
characters (plus ".c" or ".h", etc) to make life easy for MS-DOSers. Keep
compression and decompression code in separate source files --- some
applications may want only one half of the library.
Note: these rules (particularly #4) are not followed religiously in the
modules that are used in cjpeg/djpeg but are not part of the JPEG library
proper. Those modules are not really intended to be used in other
applications.

883
src/3rdparty/src/jpeg-6b/config.guess vendored
View File

@ -1,883 +0,0 @@
#! /bin/sh
# Attempt to guess a canonical system name.
# Copyright (C) 1992, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that program.
# Written by Per Bothner <bothner@cygnus.com>.
# The master version of this file is at the FSF in /home/gd/gnu/lib.
#
# This script attempts to guess a canonical system name similar to
# config.sub. If it succeeds, it prints the system name on stdout, and
# exits with 0. Otherwise, it exits with 1.
#
# The plan is that this can be called by configure scripts if you
# don't specify an explicit system type (host/target name).
#
# Only a few systems have been added to this list; please add others
# (but try to keep the structure clean).
#
# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
# (ghazi@noc.rutgers.edu 8/24/94.)
if (test -f /.attbin/uname) >/dev/null 2>&1 ; then
PATH=$PATH:/.attbin ; export PATH
fi
UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown
UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
trap 'rm -f dummy.c dummy.o dummy; exit 1' 1 2 15
# Note: order is significant - the case branches are not exclusive.
case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
alpha:OSF1:*:*)
if test $UNAME_RELEASE = "V4.0"; then
UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
fi
# A Vn.n version is a released version.
# A Tn.n version is a released field test version.
# A Xn.n version is an unreleased experimental baselevel.
# 1.2 uses "1.2" for uname -r.
cat <<EOF >dummy.s
.globl main
.ent main
main:
.frame \$30,0,\$26,0
.prologue 0
.long 0x47e03d80 # implver $0
lda \$2,259
.long 0x47e20c21 # amask $2,$1
srl \$1,8,\$2
sll \$2,2,\$2
sll \$0,3,\$0
addl \$1,\$0,\$0
addl \$2,\$0,\$0
ret \$31,(\$26),1
.end main
EOF
${CC-cc} dummy.s -o dummy 2>/dev/null
if test "$?" = 0 ; then
./dummy
case "$?" in
7)
UNAME_MACHINE="alpha"
;;
15)
UNAME_MACHINE="alphaev5"
;;
14)
UNAME_MACHINE="alphaev56"
;;
10)
UNAME_MACHINE="alphapca56"
;;
16)
UNAME_MACHINE="alphaev6"
;;
esac
fi
rm -f dummy.s dummy
echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[VTX]//' | tr [[A-Z]] [[a-z]]`
exit 0 ;;
21064:Windows_NT:50:3)
echo alpha-dec-winnt3.5
exit 0 ;;
Amiga*:UNIX_System_V:4.0:*)
echo m68k-cbm-sysv4
exit 0;;
amiga:NetBSD:*:*)
echo m68k-cbm-netbsd${UNAME_RELEASE}
exit 0 ;;
amiga:OpenBSD:*:*)
echo m68k-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
arc64:OpenBSD:*:*)
echo mips64el-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
arc:OpenBSD:*:*)
echo mipsel-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
hkmips:OpenBSD:*:*)
echo mips-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
pmax:OpenBSD:*:*)
echo mipsel-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
sgi:OpenBSD:*:*)
echo mips-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
wgrisc:OpenBSD:*:*)
echo mipsel-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
echo arm-acorn-riscix${UNAME_RELEASE}
exit 0;;
arm32:NetBSD:*:*)
echo arm-unknown-netbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
exit 0 ;;
SR2?01:HI-UX/MPP:*:*)
echo hppa1.1-hitachi-hiuxmpp
exit 0;;
Pyramid*:OSx*:*:*|MIS*:OSx*:*:*)
# akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
if test "`(/bin/universe) 2>/dev/null`" = att ; then
echo pyramid-pyramid-sysv3
else
echo pyramid-pyramid-bsd
fi
exit 0 ;;
NILE:*:*:dcosx)
echo pyramid-pyramid-svr4
exit 0 ;;
sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
exit 0 ;;
i86pc:SunOS:5.*:*)
echo i386-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
exit 0 ;;
sun4*:SunOS:6*:*)
# According to config.sub, this is the proper way to canonicalize
# SunOS6. Hard to guess exactly what SunOS6 will be like, but
# it's likely to be more like Solaris than SunOS4.
echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
exit 0 ;;
sun4*:SunOS:*:*)
case "`/usr/bin/arch -k`" in
Series*|S4*)
UNAME_RELEASE=`uname -v`
;;
esac
# Japanese Language versions have a version number like `4.1.3-JL'.
echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'`
exit 0 ;;
sun3*:SunOS:*:*)
echo m68k-sun-sunos${UNAME_RELEASE}
exit 0 ;;
sun*:*:4.2BSD:*)
UNAME_RELEASE=`(head -1 /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3
case "`/bin/arch`" in
sun3)
echo m68k-sun-sunos${UNAME_RELEASE}
;;
sun4)
echo sparc-sun-sunos${UNAME_RELEASE}
;;
esac
exit 0 ;;
aushp:SunOS:*:*)
echo sparc-auspex-sunos${UNAME_RELEASE}
exit 0 ;;
atari*:NetBSD:*:*)
echo m68k-atari-netbsd${UNAME_RELEASE}
exit 0 ;;
atari*:OpenBSD:*:*)
echo m68k-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
sun3*:NetBSD:*:*)
echo m68k-sun-netbsd${UNAME_RELEASE}
exit 0 ;;
sun3*:OpenBSD:*:*)
echo m68k-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
mac68k:NetBSD:*:*)
echo m68k-apple-netbsd${UNAME_RELEASE}
exit 0 ;;
mac68k:OpenBSD:*:*)
echo m68k-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
mvme68k:OpenBSD:*:*)
echo m68k-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
mvme88k:OpenBSD:*:*)
echo m88k-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
powerpc:machten:*:*)
echo powerpc-apple-machten${UNAME_RELEASE}
exit 0 ;;
RISC*:Mach:*:*)
echo mips-dec-mach_bsd4.3
exit 0 ;;
RISC*:ULTRIX:*:*)
echo mips-dec-ultrix${UNAME_RELEASE}
exit 0 ;;
VAX*:ULTRIX*:*:*)
echo vax-dec-ultrix${UNAME_RELEASE}
exit 0 ;;
2020:CLIX:*:*)
echo clipper-intergraph-clix${UNAME_RELEASE}
exit 0 ;;
mips:*:*:UMIPS | mips:*:*:RISCos)
sed 's/^ //' << EOF >dummy.c
int main (argc, argv) int argc; char **argv; {
#if defined (host_mips) && defined (MIPSEB)
#if defined (SYSTYPE_SYSV)
printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0);
#endif
#if defined (SYSTYPE_SVR4)
printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0);
#endif
#if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0);
#endif
#endif
exit (-1);
}
EOF
${CC-cc} dummy.c -o dummy \
&& ./dummy `echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` \
&& rm dummy.c dummy && exit 0
rm -f dummy.c dummy
echo mips-mips-riscos${UNAME_RELEASE}
exit 0 ;;
Night_Hawk:Power_UNIX:*:*)
echo powerpc-harris-powerunix
exit 0 ;;
m88k:CX/UX:7*:*)
echo m88k-harris-cxux7
exit 0 ;;
m88k:*:4*:R4*)
echo m88k-motorola-sysv4
exit 0 ;;
m88k:*:3*:R3*)
echo m88k-motorola-sysv3
exit 0 ;;
AViiON:dgux:*:*)
# DG/UX returns AViiON for all architectures
UNAME_PROCESSOR=`/usr/bin/uname -p`
if [ $UNAME_PROCESSOR = mc88100 -o $UNAME_PROCESSOR = mc88110 ] ; then
if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx \
-o ${TARGET_BINARY_INTERFACE}x = x ] ; then
echo m88k-dg-dgux${UNAME_RELEASE}
else
echo m88k-dg-dguxbcs${UNAME_RELEASE}
fi
else echo i586-dg-dgux${UNAME_RELEASE}
fi
exit 0 ;;
M88*:DolphinOS:*:*) # DolphinOS (SVR3)
echo m88k-dolphin-sysv3
exit 0 ;;
M88*:*:R3*:*)
# Delta 88k system running SVR3
echo m88k-motorola-sysv3
exit 0 ;;
XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
echo m88k-tektronix-sysv3
exit 0 ;;
Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
echo m68k-tektronix-bsd
exit 0 ;;
*:IRIX*:*:*)
echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'`
exit 0 ;;
????????:AIX?:[12].1:2) # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
echo romp-ibm-aix # uname -m gives an 8 hex-code CPU id
exit 0 ;; # Note that: echo "'`uname -s`'" gives 'AIX '
i?86:AIX:*:*)
echo i386-ibm-aix
exit 0 ;;
*:AIX:2:3)
if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
sed 's/^ //' << EOF >dummy.c
#include <sys/systemcfg.h>
main()
{
if (!__power_pc())
exit(1);
puts("powerpc-ibm-aix3.2.5");
exit(0);
}
EOF
${CC-cc} dummy.c -o dummy && ./dummy && rm dummy.c dummy && exit 0
rm -f dummy.c dummy
echo rs6000-ibm-aix3.2.5
elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
echo rs6000-ibm-aix3.2.4
else
echo rs6000-ibm-aix3.2
fi
exit 0 ;;
*:AIX:*:4)
if /usr/sbin/lsattr -EHl proc0 | grep POWER >/dev/null 2>&1; then
IBM_ARCH=rs6000
else
IBM_ARCH=powerpc
fi
if [ -x /usr/bin/oslevel ] ; then
IBM_REV=`/usr/bin/oslevel`
else
IBM_REV=4.${UNAME_RELEASE}
fi
echo ${IBM_ARCH}-ibm-aix${IBM_REV}
exit 0 ;;
*:AIX:*:*)
echo rs6000-ibm-aix
exit 0 ;;
ibmrt:4.4BSD:*|romp-ibm:BSD:*)
echo romp-ibm-bsd4.4
exit 0 ;;
ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC NetBSD and
echo romp-ibm-bsd${UNAME_RELEASE} # 4.3 with uname added to
exit 0 ;; # report: romp-ibm BSD 4.3
*:BOSX:*:*)
echo rs6000-bull-bosx
exit 0 ;;
DPX/2?00:B.O.S.:*:*)
echo m68k-bull-sysv3
exit 0 ;;
9000/[34]??:4.3bsd:1.*:*)
echo m68k-hp-bsd
exit 0 ;;
hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
echo m68k-hp-bsd4.4
exit 0 ;;
9000/[3478]??:HP-UX:*:*)
case "${UNAME_MACHINE}" in
9000/31? ) HP_ARCH=m68000 ;;
9000/[34]?? ) HP_ARCH=m68k ;;
9000/7?? | 9000/8?[1679] ) HP_ARCH=hppa1.1 ;;
9000/8?? ) HP_ARCH=hppa1.0 ;;
esac
HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
echo ${HP_ARCH}-hp-hpux${HPUX_REV}
exit 0 ;;
3050*:HI-UX:*:*)
sed 's/^ //' << EOF >dummy.c
#include <unistd.h>
int
main ()
{
long cpu = sysconf (_SC_CPU_VERSION);
/* The order matters, because CPU_IS_HP_MC68K erroneously returns
true for CPU_PA_RISC1_0. CPU_IS_PA_RISC returns correct
results, however. */
if (CPU_IS_PA_RISC (cpu))
{
switch (cpu)
{
case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break;
case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break;
case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break;
default: puts ("hppa-hitachi-hiuxwe2"); break;
}
}
else if (CPU_IS_HP_MC68K (cpu))
puts ("m68k-hitachi-hiuxwe2");
else puts ("unknown-hitachi-hiuxwe2");
exit (0);
}
EOF
${CC-cc} dummy.c -o dummy && ./dummy && rm dummy.c dummy && exit 0
rm -f dummy.c dummy
echo unknown-hitachi-hiuxwe2
exit 0 ;;
9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* )
echo hppa1.1-hp-bsd
exit 0 ;;
9000/8??:4.3bsd:*:*)
echo hppa1.0-hp-bsd
exit 0 ;;
hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* )
echo hppa1.1-hp-osf
exit 0 ;;
hp8??:OSF1:*:*)
echo hppa1.0-hp-osf
exit 0 ;;
i?86:OSF1:*:*)
if [ -x /usr/sbin/sysversion ] ; then
echo ${UNAME_MACHINE}-unknown-osf1mk
else
echo ${UNAME_MACHINE}-unknown-osf1
fi
exit 0 ;;
parisc*:Lites*:*:*)
echo hppa1.1-hp-lites
exit 0 ;;
C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
echo c1-convex-bsd
exit 0 ;;
C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
if getsysinfo -f scalar_acc
then echo c32-convex-bsd
else echo c2-convex-bsd
fi
exit 0 ;;
C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
echo c34-convex-bsd
exit 0 ;;
C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
echo c38-convex-bsd
exit 0 ;;
C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
echo c4-convex-bsd
exit 0 ;;
CRAY*X-MP:*:*:*)
echo xmp-cray-unicos
exit 0 ;;
CRAY*Y-MP:*:*:*)
echo ymp-cray-unicos${UNAME_RELEASE}
exit 0 ;;
CRAY*[A-Z]90:*:*:*)
echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \
| sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
-e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
exit 0 ;;
CRAY*TS:*:*:*)
echo t90-cray-unicos${UNAME_RELEASE}
exit 0 ;;
CRAY-2:*:*:*)
echo cray2-cray-unicos
exit 0 ;;
F300:UNIX_System_V:*:*)
FUJITSU_SYS=`uname -p | tr [A-Z] [a-z] | sed -e 's/\///'`
FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'`
echo "f300-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
exit 0 ;;
F301:UNIX_System_V:*:*)
echo f301-fujitsu-uxpv`echo $UNAME_RELEASE | sed 's/ .*//'`
exit 0 ;;
hp3[0-9][05]:NetBSD:*:*)
echo m68k-hp-netbsd${UNAME_RELEASE}
exit 0 ;;
hp300:OpenBSD:*:*)
echo m68k-unknown-openbsd${UNAME_RELEASE}
exit 0 ;;
i?86:BSD/386:*:* | *:BSD/OS:*:*)
echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE}
exit 0 ;;
*:FreeBSD:*:*)
echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`
exit 0 ;;
*:NetBSD:*:*)
echo ${UNAME_MACHINE}-unknown-netbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
exit 0 ;;
*:OpenBSD:*:*)
echo ${UNAME_MACHINE}-unknown-openbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
exit 0 ;;
i*:CYGWIN*:*)
echo i386-pc-cygwin32
exit 0 ;;
i*:MINGW*:*)
echo i386-pc-mingw32
exit 0 ;;
p*:CYGWIN*:*)
echo powerpcle-unknown-cygwin32
exit 0 ;;
prep*:SunOS:5.*:*)
echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
exit 0 ;;
*:GNU:*:*)
echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'`
exit 0 ;;
*:Linux:*:*)
# The BFD linker knows what the default object file format is, so
# first see if it will tell us.
ld_help_string=`ld --help 2>&1`
ld_supported_emulations=`echo $ld_help_string \
| sed -ne '/supported emulations:/!d
s/[ ][ ]*/ /g
s/.*supported emulations: *//
s/ .*//
p'`
case "$ld_supported_emulations" in
i?86linux) echo "${UNAME_MACHINE}-pc-linux-gnuaout" ; exit 0 ;;
i?86coff) echo "${UNAME_MACHINE}-pc-linux-gnucoff" ; exit 0 ;;
sparclinux) echo "${UNAME_MACHINE}-unknown-linux-gnuaout" ; exit 0 ;;
m68klinux) echo "${UNAME_MACHINE}-unknown-linux-gnuaout" ; exit 0 ;;
elf32ppc) echo "powerpc-unknown-linux-gnu" ; exit 0 ;;
esac
if test "${UNAME_MACHINE}" = "alpha" ; then
sed 's/^ //' <<EOF >dummy.s
.globl main
.ent main
main:
.frame \$30,0,\$26,0
.prologue 0
.long 0x47e03d80 # implver $0
lda \$2,259
.long 0x47e20c21 # amask $2,$1
srl \$1,8,\$2
sll \$2,2,\$2
sll \$0,3,\$0
addl \$1,\$0,\$0
addl \$2,\$0,\$0
ret \$31,(\$26),1
.end main
EOF
LIBC=""
${CC-cc} dummy.s -o dummy 2>/dev/null
if test "$?" = 0 ; then
./dummy
case "$?" in
7)
UNAME_MACHINE="alpha"
;;
15)
UNAME_MACHINE="alphaev5"
;;
14)
UNAME_MACHINE="alphaev56"
;;
10)
UNAME_MACHINE="alphapca56"
;;
16)
UNAME_MACHINE="alphaev6"
;;
esac
objdump --private-headers dummy | \
grep ld.so.1 > /dev/null
if test "$?" = 0 ; then
LIBC="libc1"
fi
fi
rm -f dummy.s dummy
echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC} ; exit 0
elif test "${UNAME_MACHINE}" = "mips" ; then
cat >dummy.c <<EOF
main(argc, argv)
int argc;
char *argv[];
{
#ifdef __MIPSEB__
printf ("%s-unknown-linux-gnu\n", argv[1]);
#endif
#ifdef __MIPSEL__
printf ("%sel-unknown-linux-gnu\n", argv[1]);
#endif
return 0;
}
EOF
${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy "${UNAME_MACHINE}" && rm dummy.c dummy && exit 0
rm -f dummy.c dummy
else
# Either a pre-BFD a.out linker (linux-gnuoldld)
# or one that does not give us useful --help.
# GCC wants to distinguish between linux-gnuoldld and linux-gnuaout.
# If ld does not provide *any* "supported emulations:"
# that means it is gnuoldld.
echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations:"
test $? != 0 && echo "${UNAME_MACHINE}-pc-linux-gnuoldld" && exit 0
case "${UNAME_MACHINE}" in
i?86)
VENDOR=pc;
;;
*)
VENDOR=unknown;
;;
esac
# Determine whether the default compiler is a.out or elf
cat >dummy.c <<EOF
#include <features.h>
main(argc, argv)
int argc;
char *argv[];
{
#ifdef __ELF__
# ifdef __GLIBC__
# if __GLIBC__ >= 2
printf ("%s-${VENDOR}-linux-gnu\n", argv[1]);
# else
printf ("%s-${VENDOR}-linux-gnulibc1\n", argv[1]);
# endif
# else
printf ("%s-${VENDOR}-linux-gnulibc1\n", argv[1]);
# endif
#else
printf ("%s-${VENDOR}-linux-gnuaout\n", argv[1]);
#endif
return 0;
}
EOF
${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy "${UNAME_MACHINE}" && rm dummy.c dummy && exit 0
rm -f dummy.c dummy
fi ;;
# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. earlier versions
# are messed up and put the nodename in both sysname and nodename.
i?86:DYNIX/ptx:4*:*)
echo i386-sequent-sysv4
exit 0 ;;
i?86:UNIX_SV:4.2MP:2.*)
# Unixware is an offshoot of SVR4, but it has its own version
# number series starting with 2...
# I am not positive that other SVR4 systems won't match this,
# I just have to hope. -- rms.
# Use sysv4.2uw... so that sysv4* matches it.
echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION}
exit 0 ;;
i?86:*:4.*:* | i?86:SYSTEM_V:4.*:*)
if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
echo ${UNAME_MACHINE}-univel-sysv${UNAME_RELEASE}
else
echo ${UNAME_MACHINE}-pc-sysv${UNAME_RELEASE}
fi
exit 0 ;;
i?86:*:3.2:*)
if test -f /usr/options/cb.name; then
UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
echo ${UNAME_MACHINE}-pc-isc$UNAME_REL
elif /bin/uname -X 2>/dev/null >/dev/null ; then
UNAME_REL=`(/bin/uname -X|egrep Release|sed -e 's/.*= //')`
(/bin/uname -X|egrep i80486 >/dev/null) && UNAME_MACHINE=i486
(/bin/uname -X|egrep '^Machine.*Pentium' >/dev/null) \
&& UNAME_MACHINE=i586
echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
else
echo ${UNAME_MACHINE}-pc-sysv32
fi
exit 0 ;;
pc:*:*:*)
# uname -m prints for DJGPP always 'pc', but it prints nothing about
# the processor, so we play safe by assuming i386.
echo i386-pc-msdosdjgpp
exit 0 ;;
Intel:Mach:3*:*)
echo i386-pc-mach3
exit 0 ;;
paragon:*:*:*)
echo i860-intel-osf1
exit 0 ;;
i860:*:4.*:*) # i860-SVR4
if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4
else # Add other i860-SVR4 vendors below as they are discovered.
echo i860-unknown-sysv${UNAME_RELEASE} # Unknown i860-SVR4
fi
exit 0 ;;
mini*:CTIX:SYS*5:*)
# "miniframe"
echo m68010-convergent-sysv
exit 0 ;;
M68*:*:R3V[567]*:*)
test -r /sysV68 && echo 'm68k-motorola-sysv' && exit 0 ;;
3[34]??:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 4850:*:4.0:3.0)
OS_REL=''
test -r /etc/.relid \
&& OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
&& echo i486-ncr-sysv4.3${OS_REL} && exit 0
/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
&& echo i586-ncr-sysv4.3${OS_REL} && exit 0 ;;
3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
&& echo i486-ncr-sysv4 && exit 0 ;;
m68*:LynxOS:2.*:*)
echo m68k-unknown-lynxos${UNAME_RELEASE}
exit 0 ;;
mc68030:UNIX_System_V:4.*:*)
echo m68k-atari-sysv4
exit 0 ;;
i?86:LynxOS:2.*:*)
echo i386-unknown-lynxos${UNAME_RELEASE}
exit 0 ;;
TSUNAMI:LynxOS:2.*:*)
echo sparc-unknown-lynxos${UNAME_RELEASE}
exit 0 ;;
rs6000:LynxOS:2.*:* | PowerPC:LynxOS:2.*:*)
echo rs6000-unknown-lynxos${UNAME_RELEASE}
exit 0 ;;
SM[BE]S:UNIX_SV:*:*)
echo mips-dde-sysv${UNAME_RELEASE}
exit 0 ;;
RM*:SINIX-*:*:*)
echo mips-sni-sysv4
exit 0 ;;
*:SINIX-*:*:*)
if uname -p 2>/dev/null >/dev/null ; then
UNAME_MACHINE=`(uname -p) 2>/dev/null`
echo ${UNAME_MACHINE}-sni-sysv4
else
echo ns32k-sni-sysv
fi
exit 0 ;;
PENTIUM:CPunix:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort
# says <Richard.M.Bartel@ccMail.Census.GOV>
echo i586-unisys-sysv4
exit 0 ;;
*:UNIX_System_V:4*:FTX*)
# From Gerald Hewes <hewes@openmarket.com>.
# How about differentiating between stratus architectures? -djm
echo hppa1.1-stratus-sysv4
exit 0 ;;
*:*:*:FTX*)
# From seanf@swdc.stratus.com.
echo i860-stratus-sysv4
exit 0 ;;
mc68*:A/UX:*:*)
echo m68k-apple-aux${UNAME_RELEASE}
exit 0 ;;
news*:NEWS-OS:*:6*)
echo mips-sony-newsos6
exit 0 ;;
R3000:*System_V*:*:* | R4000:UNIX_SYSV:*:*)
if [ -d /usr/nec ]; then
echo mips-nec-sysv${UNAME_RELEASE}
else
echo mips-unknown-sysv${UNAME_RELEASE}
fi
exit 0 ;;
esac
#echo '(No uname command or uname output not recognized.)' 1>&2
#echo "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" 1>&2
cat >dummy.c <<EOF
#ifdef _SEQUENT_
# include <sys/types.h>
# include <sys/utsname.h>
#endif
main ()
{
#if defined (sony)
#if defined (MIPSEB)
/* BFD wants "bsd" instead of "newsos". Perhaps BFD should be changed,
I don't know.... */
printf ("mips-sony-bsd\n"); exit (0);
#else
#include <sys/param.h>
printf ("m68k-sony-newsos%s\n",
#ifdef NEWSOS4
"4"
#else
""
#endif
); exit (0);
#endif
#endif
#if defined (__arm) && defined (__acorn) && defined (__unix)
printf ("arm-acorn-riscix"); exit (0);
#endif
#if defined (hp300) && !defined (hpux)
printf ("m68k-hp-bsd\n"); exit (0);
#endif
#if defined (NeXT)
#if !defined (__ARCHITECTURE__)
#define __ARCHITECTURE__ "m68k"
#endif
int version;
version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
exit (0);
#endif
#if defined (MULTIMAX) || defined (n16)
#if defined (UMAXV)
printf ("ns32k-encore-sysv\n"); exit (0);
#else
#if defined (CMU)
printf ("ns32k-encore-mach\n"); exit (0);
#else
printf ("ns32k-encore-bsd\n"); exit (0);
#endif
#endif
#endif
#if defined (__386BSD__)
printf ("i386-pc-bsd\n"); exit (0);
#endif
#if defined (sequent)
#if defined (i386)
printf ("i386-sequent-dynix\n"); exit (0);
#endif
#if defined (ns32000)
printf ("ns32k-sequent-dynix\n"); exit (0);
#endif
#endif
#if defined (_SEQUENT_)
struct utsname un;
uname(&un);
if (strncmp(un.version, "V2", 2) == 0) {
printf ("i386-sequent-ptx2\n"); exit (0);
}
if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */
printf ("i386-sequent-ptx1\n"); exit (0);
}
printf ("i386-sequent-ptx\n"); exit (0);
#endif
#if defined (vax)
#if !defined (ultrix)
printf ("vax-dec-bsd\n"); exit (0);
#else
printf ("vax-dec-ultrix\n"); exit (0);
#endif
#endif
#if defined (alliant) && defined (i860)
printf ("i860-alliant-bsd\n"); exit (0);
#endif
exit (1);
}
EOF
${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy && rm dummy.c dummy && exit 0
rm -f dummy.c dummy
# Apollos put the system type in the environment.
test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit 0; }
# Convex versions that predate uname can use getsysinfo(1)
if [ -x /usr/convex/getsysinfo ]
then
case `getsysinfo -f cpu_type` in
c1*)
echo c1-convex-bsd
exit 0 ;;
c2*)
if getsysinfo -f scalar_acc
then echo c32-convex-bsd
else echo c2-convex-bsd
fi
exit 0 ;;
c34*)
echo c34-convex-bsd
exit 0 ;;
c38*)
echo c38-convex-bsd
exit 0 ;;
c4*)
echo c4-convex-bsd
exit 0 ;;
esac
fi
#echo '(Unable to guess system type)' 1>&2
exit 1

954
src/3rdparty/src/jpeg-6b/config.sub vendored
View File

@ -1,954 +0,0 @@
#! /bin/sh
# Configuration validation subroutine script, version 1.1.
# Copyright (C) 1991, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
# This file is (in principle) common to ALL GNU software.
# The presence of a machine in this file suggests that SOME GNU software
# can handle that machine. It does not imply ALL GNU software can.
#
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that program.
# Configuration subroutine to validate and canonicalize a configuration type.
# Supply the specified configuration type as an argument.
# If it is invalid, we print an error message on stderr and exit with code 1.
# Otherwise, we print the canonical config type on stdout and succeed.
# This file is supposed to be the same for all GNU packages
# and recognize all the CPU types, system types and aliases
# that are meaningful with *any* GNU software.
# Each package is responsible for reporting which valid configurations
# it does not support. The user should be able to distinguish
# a failure to support a valid configuration from a meaningless
# configuration.
# The goal of this file is to map all the various variations of a given
# machine specification into a single specification in the form:
# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
# or in some cases, the newer four-part form:
# CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
# It is wrong to echo any other type of specification.
if [ x$1 = x ]
then
echo Configuration name missing. 1>&2
echo "Usage: $0 CPU-MFR-OPSYS" 1>&2
echo "or $0 ALIAS" 1>&2
echo where ALIAS is a recognized configuration type. 1>&2
exit 1
fi
# First pass through any local machine types.
case $1 in
*local*)
echo $1
exit 0
;;
*)
;;
esac
# Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any).
# Here we must recognize all the valid KERNEL-OS combinations.
maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
case $maybe_os in
linux-gnu*)
os=-$maybe_os
basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
;;
*)
basic_machine=`echo $1 | sed 's/-[^-]*$//'`
if [ $basic_machine != $1 ]
then os=`echo $1 | sed 's/.*-/-/'`
else os=; fi
;;
esac
### Let's recognize common machines as not being operating systems so
### that things like config.sub decstation-3100 work. We also
### recognize some manufacturers as not being operating systems, so we
### can provide default operating systems below.
case $os in
-sun*os*)
# Prevent following clause from handling this invalid input.
;;
-dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \
-att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \
-unicom* | -ibm* | -next | -hp | -isi* | -apollo | -altos* | \
-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \
-apple)
os=
basic_machine=$1
;;
-hiux*)
os=-hiuxwe2
;;
-sco5)
os=sco3.2v5
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco4)
os=-sco3.2v4
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco3.2.[4-9]*)
os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco3.2v[4-9]*)
# Don't forget version if it is 3.2v4 or newer.
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco*)
os=-sco3.2v2
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-isc)
os=-isc2.2
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-clix*)
basic_machine=clipper-intergraph
;;
-isc*)
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-lynx*)
os=-lynxos
;;
-ptx*)
basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'`
;;
-windowsnt*)
os=`echo $os | sed -e 's/windowsnt/winnt/'`
;;
-psos*)
os=-psos
;;
esac
# Decode aliases for certain CPU-COMPANY combinations.
case $basic_machine in
# Recognize the basic CPU types without company name.
# Some are omitted here because they have special meanings below.
tahoe | i860 | m32r | m68k | m68000 | m88k | ns32k | arc | arm \
| arme[lb] | pyramid | mn10200 | mn10300 \
| tron | a29k | 580 | i960 | h8300 | hppa | hppa1.0 | hppa1.1 \
| alpha | alphaev5 | alphaev56 | we32k | ns16k | clipper \
| i370 | sh | powerpc | powerpcle | 1750a | dsp16xx | pdp11 \
| mips64 | mipsel | mips64el | mips64orion | mips64orionel \
| mipstx39 | mipstx39el \
| sparc | sparclet | sparclite | sparc64 | v850)
basic_machine=$basic_machine-unknown
;;
# We use `pc' rather than `unknown'
# because (1) that's what they normally are, and
# (2) the word "unknown" tends to confuse beginning users.
i[3456]86)
basic_machine=$basic_machine-pc
;;
# Object if more than one company name word.
*-*-*)
echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
exit 1
;;
# Recognize the basic CPU types with company name.
vax-* | tahoe-* | i[3456]86-* | i860-* | m32r-* | m68k-* | m68000-* \
| m88k-* | sparc-* | ns32k-* | fx80-* | arc-* | arm-* | c[123]* \
| mips-* | pyramid-* | tron-* | a29k-* | romp-* | rs6000-* \
| power-* | none-* | 580-* | cray2-* | h8300-* | i960-* \
| xmp-* | ymp-* | hppa-* | hppa1.0-* | hppa1.1-* \
| alpha-* | alphaev5-* | alphaev56-* | we32k-* | cydra-* \
| ns16k-* | pn-* | np1-* | xps100-* | clipper-* | orion-* \
| sparclite-* | pdp11-* | sh-* | powerpc-* | powerpcle-* \
| sparc64-* | mips64-* | mipsel-* \
| mips64el-* | mips64orion-* | mips64orionel-* \
| mipstx39-* | mipstx39el-* \
| f301-*)
;;
# Recognize the various machine names and aliases which stand
# for a CPU type and a company and sometimes even an OS.
3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
basic_machine=m68000-att
;;
3b*)
basic_machine=we32k-att
;;
alliant | fx80)
basic_machine=fx80-alliant
;;
altos | altos3068)
basic_machine=m68k-altos
;;
am29k)
basic_machine=a29k-none
os=-bsd
;;
amdahl)
basic_machine=580-amdahl
os=-sysv
;;
amiga | amiga-*)
basic_machine=m68k-cbm
;;
amigaos | amigados)
basic_machine=m68k-cbm
os=-amigaos
;;
amigaunix | amix)
basic_machine=m68k-cbm
os=-sysv4
;;
apollo68)
basic_machine=m68k-apollo
os=-sysv
;;
aux)
basic_machine=m68k-apple
os=-aux
;;
balance)
basic_machine=ns32k-sequent
os=-dynix
;;
convex-c1)
basic_machine=c1-convex
os=-bsd
;;
convex-c2)
basic_machine=c2-convex
os=-bsd
;;
convex-c32)
basic_machine=c32-convex
os=-bsd
;;
convex-c34)
basic_machine=c34-convex
os=-bsd
;;
convex-c38)
basic_machine=c38-convex
os=-bsd
;;
cray | ymp)
basic_machine=ymp-cray
os=-unicos
;;
cray2)
basic_machine=cray2-cray
os=-unicos
;;
[ctj]90-cray)
basic_machine=c90-cray
os=-unicos
;;
crds | unos)
basic_machine=m68k-crds
;;
da30 | da30-*)
basic_machine=m68k-da30
;;
decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn)
basic_machine=mips-dec
;;
delta | 3300 | motorola-3300 | motorola-delta \
| 3300-motorola | delta-motorola)
basic_machine=m68k-motorola
;;
delta88)
basic_machine=m88k-motorola
os=-sysv3
;;
dpx20 | dpx20-*)
basic_machine=rs6000-bull
os=-bosx
;;
dpx2* | dpx2*-bull)
basic_machine=m68k-bull
os=-sysv3
;;
ebmon29k)
basic_machine=a29k-amd
os=-ebmon
;;
elxsi)
basic_machine=elxsi-elxsi
os=-bsd
;;
encore | umax | mmax)
basic_machine=ns32k-encore
;;
fx2800)
basic_machine=i860-alliant
;;
genix)
basic_machine=ns32k-ns
;;
gmicro)
basic_machine=tron-gmicro
os=-sysv
;;
h3050r* | hiux*)
basic_machine=hppa1.1-hitachi
os=-hiuxwe2
;;
h8300hms)
basic_machine=h8300-hitachi
os=-hms
;;
harris)
basic_machine=m88k-harris
os=-sysv3
;;
hp300-*)
basic_machine=m68k-hp
;;
hp300bsd)
basic_machine=m68k-hp
os=-bsd
;;
hp300hpux)
basic_machine=m68k-hp
os=-hpux
;;
hp9k2[0-9][0-9] | hp9k31[0-9])
basic_machine=m68000-hp
;;
hp9k3[2-9][0-9])
basic_machine=m68k-hp
;;
hp9k7[0-9][0-9] | hp7[0-9][0-9] | hp9k8[0-9]7 | hp8[0-9]7)
basic_machine=hppa1.1-hp
;;
hp9k8[0-9][0-9] | hp8[0-9][0-9])
basic_machine=hppa1.0-hp
;;
hppa-next)
os=-nextstep3
;;
i370-ibm* | ibm*)
basic_machine=i370-ibm
os=-mvs
;;
# I'm not sure what "Sysv32" means. Should this be sysv3.2?
i[3456]86v32)
basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
os=-sysv32
;;
i[3456]86v4*)
basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
os=-sysv4
;;
i[3456]86v)
basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
os=-sysv
;;
i[3456]86sol2)
basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
os=-solaris2
;;
iris | iris4d)
basic_machine=mips-sgi
case $os in
-irix*)
;;
*)
os=-irix4
;;
esac
;;
isi68 | isi)
basic_machine=m68k-isi
os=-sysv
;;
m88k-omron*)
basic_machine=m88k-omron
;;
magnum | m3230)
basic_machine=mips-mips
os=-sysv
;;
merlin)
basic_machine=ns32k-utek
os=-sysv
;;
miniframe)
basic_machine=m68000-convergent
;;
mipsel*-linux*)
basic_machine=mipsel-unknown
os=-linux-gnu
;;
mips*-linux*)
basic_machine=mips-unknown
os=-linux-gnu
;;
mips3*-*)
basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`
;;
mips3*)
basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
;;
ncr3000)
basic_machine=i486-ncr
os=-sysv4
;;
news | news700 | news800 | news900)
basic_machine=m68k-sony
os=-newsos
;;
news1000)
basic_machine=m68030-sony
os=-newsos
;;
news-3600 | risc-news)
basic_machine=mips-sony
os=-newsos
;;
next | m*-next )
basic_machine=m68k-next
case $os in
-nextstep* )
;;
-ns2*)
os=-nextstep2
;;
*)
os=-nextstep3
;;
esac
;;
nh3000)
basic_machine=m68k-harris
os=-cxux
;;
nh[45]000)
basic_machine=m88k-harris
os=-cxux
;;
nindy960)
basic_machine=i960-intel
os=-nindy
;;
np1)
basic_machine=np1-gould
;;
pa-hitachi)
basic_machine=hppa1.1-hitachi
os=-hiuxwe2
;;
paragon)
basic_machine=i860-intel
os=-osf
;;
pbd)
basic_machine=sparc-tti
;;
pbb)
basic_machine=m68k-tti
;;
pc532 | pc532-*)
basic_machine=ns32k-pc532
;;
pentium | p5)
basic_machine=i586-intel
;;
pentiumpro | p6)
basic_machine=i686-intel
;;
pentium-* | p5-*)
basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pentiumpro-* | p6-*)
basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
k5)
# We don't have specific support for AMD's K5 yet, so just call it a Pentium
basic_machine=i586-amd
;;
nexen)
# We don't have specific support for Nexgen yet, so just call it a Pentium
basic_machine=i586-nexgen
;;
pn)
basic_machine=pn-gould
;;
power) basic_machine=rs6000-ibm
;;
ppc) basic_machine=powerpc-unknown
;;
ppc-*) basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
ppcle | powerpclittle | ppc-le | powerpc-little)
basic_machine=powerpcle-unknown
;;
ppcle-* | powerpclittle-*)
basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
ps2)
basic_machine=i386-ibm
;;
rm[46]00)
basic_machine=mips-siemens
;;
rtpc | rtpc-*)
basic_machine=romp-ibm
;;
sequent)
basic_machine=i386-sequent
;;
sh)
basic_machine=sh-hitachi
os=-hms
;;
sps7)
basic_machine=m68k-bull
os=-sysv2
;;
spur)
basic_machine=spur-unknown
;;
sun2)
basic_machine=m68000-sun
;;
sun2os3)
basic_machine=m68000-sun
os=-sunos3
;;
sun2os4)
basic_machine=m68000-sun
os=-sunos4
;;
sun3os3)
basic_machine=m68k-sun
os=-sunos3
;;
sun3os4)
basic_machine=m68k-sun
os=-sunos4
;;
sun4os3)
basic_machine=sparc-sun
os=-sunos3
;;
sun4os4)
basic_machine=sparc-sun
os=-sunos4
;;
sun4sol2)
basic_machine=sparc-sun
os=-solaris2
;;
sun3 | sun3-*)
basic_machine=m68k-sun
;;
sun4)
basic_machine=sparc-sun
;;
sun386 | sun386i | roadrunner)
basic_machine=i386-sun
;;
symmetry)
basic_machine=i386-sequent
os=-dynix
;;
tx39)
basic_machine=mipstx39-unknown
;;
tx39el)
basic_machine=mipstx39el-unknown
;;
tower | tower-32)
basic_machine=m68k-ncr
;;
udi29k)
basic_machine=a29k-amd
os=-udi
;;
ultra3)
basic_machine=a29k-nyu
os=-sym1
;;
vaxv)
basic_machine=vax-dec
os=-sysv
;;
vms)
basic_machine=vax-dec
os=-vms
;;
vpp*|vx|vx-*)
basic_machine=f301-fujitsu
;;
vxworks960)
basic_machine=i960-wrs
os=-vxworks
;;
vxworks68)
basic_machine=m68k-wrs
os=-vxworks
;;
vxworks29k)
basic_machine=a29k-wrs
os=-vxworks
;;
xmp)
basic_machine=xmp-cray
os=-unicos
;;
xps | xps100)
basic_machine=xps100-honeywell
;;
none)
basic_machine=none-none
os=-none
;;
# Here we handle the default manufacturer of certain CPU types. It is in
# some cases the only manufacturer, in others, it is the most popular.
mips)
if [ x$os = x-linux-gnu ]; then
basic_machine=mips-unknown
else
basic_machine=mips-mips
fi
;;
romp)
basic_machine=romp-ibm
;;
rs6000)
basic_machine=rs6000-ibm
;;
vax)
basic_machine=vax-dec
;;
pdp11)
basic_machine=pdp11-dec
;;
we32k)
basic_machine=we32k-att
;;
sparc)
basic_machine=sparc-sun
;;
cydra)
basic_machine=cydra-cydrome
;;
orion)
basic_machine=orion-highlevel
;;
orion105)
basic_machine=clipper-highlevel
;;
*)
echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
exit 1
;;
esac
# Here we canonicalize certain aliases for manufacturers.
case $basic_machine in
*-digital*)
basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
;;
*-commodore*)
basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
;;
*)
;;
esac
# Decode manufacturer-specific aliases for certain operating systems.
if [ x"$os" != x"" ]
then
case $os in
# First match some system type aliases
# that might get confused with valid system types.
# -solaris* is a basic system type, with this one exception.
-solaris1 | -solaris1.*)
os=`echo $os | sed -e 's|solaris1|sunos4|'`
;;
-solaris)
os=-solaris2
;;
-svr4*)
os=-sysv4
;;
-unixware*)
os=-sysv4.2uw
;;
-gnu/linux*)
os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'`
;;
# First accept the basic system types.
# The portable systems comes first.
# Each alternative MUST END IN A *, to match a version number.
# -sysv* is not here because it comes later, after sysvr4.
-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
| -*vms* | -sco* | -esix* | -isc* | -aix* | -sunos | -sunos[34]*\
| -hpux* | -unos* | -osf* | -luna* | -dgux* | -solaris* | -sym* \
| -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
| -aos* \
| -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
| -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
| -hiux* | -386bsd* | -netbsd* | -openbsd* | -freebsd* | -riscix* \
| -lynxos* | -bosx* | -nextstep* | -cxux* | -aout* | -elf* \
| -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
| -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
| -cygwin32* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
| -mingw32* | -linux-gnu* | -uxpv*)
# Remember, each alternative MUST END IN *, to match a version number.
;;
-linux*)
os=`echo $os | sed -e 's|linux|linux-gnu|'`
;;
-sunos5*)
os=`echo $os | sed -e 's|sunos5|solaris2|'`
;;
-sunos6*)
os=`echo $os | sed -e 's|sunos6|solaris3|'`
;;
-osfrose*)
os=-osfrose
;;
-osf*)
os=-osf
;;
-utek*)
os=-bsd
;;
-dynix*)
os=-bsd
;;
-acis*)
os=-aos
;;
-ctix* | -uts*)
os=-sysv
;;
-ns2 )
os=-nextstep2
;;
# Preserve the version number of sinix5.
-sinix5.*)
os=`echo $os | sed -e 's|sinix|sysv|'`
;;
-sinix*)
os=-sysv4
;;
-triton*)
os=-sysv3
;;
-oss*)
os=-sysv3
;;
-svr4)
os=-sysv4
;;
-svr3)
os=-sysv3
;;
-sysvr4)
os=-sysv4
;;
# This must come after -sysvr4.
-sysv*)
;;
-xenix)
os=-xenix
;;
-none)
;;
*)
# Get rid of the `-' at the beginning of $os.
os=`echo $os | sed 's/[^-]*-//'`
echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
exit 1
;;
esac
else
# Here we handle the default operating systems that come with various machines.
# The value should be what the vendor currently ships out the door with their
# machine or put another way, the most popular os provided with the machine.
# Note that if you're going to try to match "-MANUFACTURER" here (say,
# "-sun"), then you have to tell the case statement up towards the top
# that MANUFACTURER isn't an operating system. Otherwise, code above
# will signal an error saying that MANUFACTURER isn't an operating
# system, and we'll never get to this point.
case $basic_machine in
*-acorn)
os=-riscix1.2
;;
arm*-semi)
os=-aout
;;
pdp11-*)
os=-none
;;
*-dec | vax-*)
os=-ultrix4.2
;;
m68*-apollo)
os=-domain
;;
i386-sun)
os=-sunos4.0.2
;;
m68000-sun)
os=-sunos3
# This also exists in the configure program, but was not the
# default.
# os=-sunos4
;;
*-tti) # must be before sparc entry or we get the wrong os.
os=-sysv3
;;
sparc-* | *-sun)
os=-sunos4.1.1
;;
*-ibm)
os=-aix
;;
*-hp)
os=-hpux
;;
*-hitachi)
os=-hiux
;;
i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
os=-sysv
;;
*-cbm)
os=-amigaos
;;
*-dg)
os=-dgux
;;
*-dolphin)
os=-sysv3
;;
m68k-ccur)
os=-rtu
;;
m88k-omron*)
os=-luna
;;
*-next )
os=-nextstep
;;
*-sequent)
os=-ptx
;;
*-crds)
os=-unos
;;
*-ns)
os=-genix
;;
i370-*)
os=-mvs
;;
*-next)
os=-nextstep3
;;
*-gould)
os=-sysv
;;
*-highlevel)
os=-bsd
;;
*-encore)
os=-bsd
;;
*-sgi)
os=-irix
;;
*-siemens)
os=-sysv4
;;
*-masscomp)
os=-rtu
;;
f301-fujitsu)
os=-uxpv
;;
*)
os=-none
;;
esac
fi
# Here we handle the case where we know the os, and the CPU type, but not the
# manufacturer. We pick the logical manufacturer.
vendor=unknown
case $basic_machine in
*-unknown)
case $os in
-riscix*)
vendor=acorn
;;
-sunos*)
vendor=sun
;;
-aix*)
vendor=ibm
;;
-hpux*)
vendor=hp
;;
-hiux*)
vendor=hitachi
;;
-unos*)
vendor=crds
;;
-dgux*)
vendor=dg
;;
-luna*)
vendor=omron
;;
-genix*)
vendor=ns
;;
-mvs*)
vendor=ibm
;;
-ptx*)
vendor=sequent
;;
-vxsim* | -vxworks*)
vendor=wrs
;;
-aux*)
vendor=apple
;;
esac
basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
;;
esac
echo $basic_machine$os

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src/3rdparty/src/jpeg-6b/configure vendored
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@ -1,253 +0,0 @@
.TH DJPEG 1 "22 August 1997"
.SH NAME
djpeg \- decompress a JPEG file to an image file
.SH SYNOPSIS
.B djpeg
[
.I options
]
[
.I filename
]
.LP
.SH DESCRIPTION
.LP
.B djpeg
decompresses the named JPEG file, or the standard input if no file is named,
and produces an image file on the standard output. PBMPLUS (PPM/PGM), BMP,
GIF, Targa, or RLE (Utah Raster Toolkit) output format can be selected.
(RLE is supported only if the URT library is available.)
.SH OPTIONS
All switch names may be abbreviated; for example,
.B \-grayscale
may be written
.B \-gray
or
.BR \-gr .
Most of the "basic" switches can be abbreviated to as little as one letter.
Upper and lower case are equivalent (thus
.B \-BMP
is the same as
.BR \-bmp ).
British spellings are also accepted (e.g.,
.BR \-greyscale ),
though for brevity these are not mentioned below.
.PP
The basic switches are:
.TP
.BI \-colors " N"
Reduce image to at most N colors. This reduces the number of colors used in
the output image, so that it can be displayed on a colormapped display or
stored in a colormapped file format. For example, if you have an 8-bit
display, you'd need to reduce to 256 or fewer colors.
.TP
.BI \-quantize " N"
Same as
.BR \-colors .
.B \-colors
is the recommended name,
.B \-quantize
is provided only for backwards compatibility.
.TP
.B \-fast
Select recommended processing options for fast, low quality output. (The
default options are chosen for highest quality output.) Currently, this is
equivalent to \fB\-dct fast \-nosmooth \-onepass \-dither ordered\fR.
.TP
.B \-grayscale
Force gray-scale output even if JPEG file is color. Useful for viewing on
monochrome displays; also,
.B djpeg
runs noticeably faster in this mode.
.TP
.BI \-scale " M/N"
Scale the output image by a factor M/N. Currently the scale factor must be
1/1, 1/2, 1/4, or 1/8. Scaling is handy if the image is larger than your
screen; also,
.B djpeg
runs much faster when scaling down the output.
.TP
.B \-bmp
Select BMP output format (Windows flavor). 8-bit colormapped format is
emitted if
.B \-colors
or
.B \-grayscale
is specified, or if the JPEG file is gray-scale; otherwise, 24-bit full-color
format is emitted.
.TP
.B \-gif
Select GIF output format. Since GIF does not support more than 256 colors,
.B \-colors 256
is assumed (unless you specify a smaller number of colors).
.TP
.B \-os2
Select BMP output format (OS/2 1.x flavor). 8-bit colormapped format is
emitted if
.B \-colors
or
.B \-grayscale
is specified, or if the JPEG file is gray-scale; otherwise, 24-bit full-color
format is emitted.
.TP
.B \-pnm
Select PBMPLUS (PPM/PGM) output format (this is the default format).
PGM is emitted if the JPEG file is gray-scale or if
.B \-grayscale
is specified; otherwise PPM is emitted.
.TP
.B \-rle
Select RLE output format. (Requires URT library.)
.TP
.B \-targa
Select Targa output format. Gray-scale format is emitted if the JPEG file is
gray-scale or if
.B \-grayscale
is specified; otherwise, colormapped format is emitted if
.B \-colors
is specified; otherwise, 24-bit full-color format is emitted.
.PP
Switches for advanced users:
.TP
.B \-dct int
Use integer DCT method (default).
.TP
.B \-dct fast
Use fast integer DCT (less accurate).
.TP
.B \-dct float
Use floating-point DCT method.
The float method is very slightly more accurate than the int method, but is
much slower unless your machine has very fast floating-point hardware. Also
note that results of the floating-point method may vary slightly across
machines, while the integer methods should give the same results everywhere.
The fast integer method is much less accurate than the other two.
.TP
.B \-dither fs
Use Floyd-Steinberg dithering in color quantization.
.TP
.B \-dither ordered
Use ordered dithering in color quantization.
.TP
.B \-dither none
Do not use dithering in color quantization.
By default, Floyd-Steinberg dithering is applied when quantizing colors; this
is slow but usually produces the best results. Ordered dither is a compromise
between speed and quality; no dithering is fast but usually looks awful. Note
that these switches have no effect unless color quantization is being done.
Ordered dither is only available in
.B \-onepass
mode.
.TP
.BI \-map " file"
Quantize to the colors used in the specified image file. This is useful for
producing multiple files with identical color maps, or for forcing a
predefined set of colors to be used. The
.I file
must be a GIF or PPM file. This option overrides
.B \-colors
and
.BR \-onepass .
.TP
.B \-nosmooth
Use a faster, lower-quality upsampling routine.
.TP
.B \-onepass
Use one-pass instead of two-pass color quantization. The one-pass method is
faster and needs less memory, but it produces a lower-quality image.
.B \-onepass
is ignored unless you also say
.B \-colors
.IR N .
Also, the one-pass method is always used for gray-scale output (the two-pass
method is no improvement then).
.TP
.BI \-maxmemory " N"
Set limit for amount of memory to use in processing large images. Value is
in thousands of bytes, or millions of bytes if "M" is attached to the
number. For example,
.B \-max 4m
selects 4000000 bytes. If more space is needed, temporary files will be used.
.TP
.BI \-outfile " name"
Send output image to the named file, not to standard output.
.TP
.B \-verbose
Enable debug printout. More
.BR \-v 's
give more output. Also, version information is printed at startup.
.TP
.B \-debug
Same as
.BR \-verbose .
.SH EXAMPLES
.LP
This example decompresses the JPEG file foo.jpg, quantizes it to
256 colors, and saves the output in 8-bit BMP format in foo.bmp:
.IP
.B djpeg \-colors 256 \-bmp
.I foo.jpg
.B >
.I foo.bmp
.SH HINTS
To get a quick preview of an image, use the
.B \-grayscale
and/or
.B \-scale
switches.
.B \-grayscale \-scale 1/8
is the fastest case.
.PP
Several options are available that trade off image quality to gain speed.
.B \-fast
turns on the recommended settings.
.PP
.B \-dct fast
and/or
.B \-nosmooth
gain speed at a small sacrifice in quality.
When producing a color-quantized image,
.B \-onepass \-dither ordered
is fast but much lower quality than the default behavior.
.B \-dither none
may give acceptable results in two-pass mode, but is seldom tolerable in
one-pass mode.
.PP
If you are fortunate enough to have very fast floating point hardware,
\fB\-dct float\fR may be even faster than \fB\-dct fast\fR. But on most
machines \fB\-dct float\fR is slower than \fB\-dct int\fR; in this case it is
not worth using, because its theoretical accuracy advantage is too small to be
significant in practice.
.SH ENVIRONMENT
.TP
.B JPEGMEM
If this environment variable is set, its value is the default memory limit.
The value is specified as described for the
.B \-maxmemory
switch.
.B JPEGMEM
overrides the default value specified when the program was compiled, and
itself is overridden by an explicit
.BR \-maxmemory .
.SH SEE ALSO
.BR cjpeg (1),
.BR jpegtran (1),
.BR rdjpgcom (1),
.BR wrjpgcom (1)
.br
.BR ppm (5),
.BR pgm (5)
.br
Wallace, Gregory K. "The JPEG Still Picture Compression Standard",
Communications of the ACM, April 1991 (vol. 34, no. 4), pp. 30-44.
.SH AUTHOR
Independent JPEG Group
.SH BUGS
Arithmetic coding is not supported for legal reasons.
.PP
To avoid the Unisys LZW patent,
.B djpeg
produces uncompressed GIF files. These are larger than they should be, but
are readable by standard GIF decoders.
.PP
Still not as fast as we'd like.

616
src/3rdparty/src/jpeg-6b/djpeg.c vendored
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@ -1,616 +0,0 @@
/*
* djpeg.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains a command-line user interface for the JPEG decompressor.
* It should work on any system with Unix- or MS-DOS-style command lines.
*
* Two different command line styles are permitted, depending on the
* compile-time switch TWO_FILE_COMMANDLINE:
* djpeg [options] inputfile outputfile
* djpeg [options] [inputfile]
* In the second style, output is always to standard output, which you'd
* normally redirect to a file or pipe to some other program. Input is
* either from a named file or from standard input (typically redirected).
* The second style is convenient on Unix but is unhelpful on systems that
* don't support pipes. Also, you MUST use the first style if your system
* doesn't do binary I/O to stdin/stdout.
* To simplify script writing, the "-outfile" switch is provided. The syntax
* djpeg [options] -outfile outputfile inputfile
* works regardless of which command line style is used.
*/
#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
#include "jversion.h" /* for version message */
#include <ctype.h> /* to declare isprint() */
#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
#ifdef __MWERKS__
#include <SIOUX.h> /* Metrowerks needs this */
#include <console.h> /* ... and this */
#endif
#ifdef THINK_C
#include <console.h> /* Think declares it here */
#endif
#endif
/* Create the add-on message string table. */
#define JMESSAGE(code,string) string ,
static const char * const cdjpeg_message_table[] = {
#include "cderror.h"
NULL
};
/*
* This list defines the known output image formats
* (not all of which need be supported by a given version).
* You can change the default output format by defining DEFAULT_FMT;
* indeed, you had better do so if you undefine PPM_SUPPORTED.
*/
typedef enum {
FMT_BMP, /* BMP format (Windows flavor) */
FMT_GIF, /* GIF format */
FMT_OS2, /* BMP format (OS/2 flavor) */
FMT_PPM, /* PPM/PGM (PBMPLUS formats) */
FMT_RLE, /* RLE format */
FMT_TARGA, /* Targa format */
FMT_TIFF /* TIFF format */
} IMAGE_FORMATS;
#ifndef DEFAULT_FMT /* so can override from CFLAGS in Makefile */
#define DEFAULT_FMT FMT_PPM
#endif
static IMAGE_FORMATS requested_fmt;
/*
* Argument-parsing code.
* The switch parser is designed to be useful with DOS-style command line
* syntax, ie, intermixed switches and file names, where only the switches
* to the left of a given file name affect processing of that file.
* The main program in this file doesn't actually use this capability...
*/
static const char * progname; /* program name for error messages */
static char * outfilename; /* for -outfile switch */
LOCAL(void)
usage (void)
/* complain about bad command line */
{
fprintf(stderr, "usage: %s [switches] ", progname);
#ifdef TWO_FILE_COMMANDLINE
fprintf(stderr, "inputfile outputfile\n");
#else
fprintf(stderr, "[inputfile]\n");
#endif
fprintf(stderr, "Switches (names may be abbreviated):\n");
fprintf(stderr, " -colors N Reduce image to no more than N colors\n");
fprintf(stderr, " -fast Fast, low-quality processing\n");
fprintf(stderr, " -grayscale Force grayscale output\n");
#ifdef IDCT_SCALING_SUPPORTED
fprintf(stderr, " -scale M/N Scale output image by fraction M/N, eg, 1/8\n");
#endif
#ifdef BMP_SUPPORTED
fprintf(stderr, " -bmp Select BMP output format (Windows style)%s\n",
(DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
#endif
#ifdef GIF_SUPPORTED
fprintf(stderr, " -gif Select GIF output format%s\n",
(DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
#endif
#ifdef BMP_SUPPORTED
fprintf(stderr, " -os2 Select BMP output format (OS/2 style)%s\n",
(DEFAULT_FMT == FMT_OS2 ? " (default)" : ""));
#endif
#ifdef PPM_SUPPORTED
fprintf(stderr, " -pnm Select PBMPLUS (PPM/PGM) output format%s\n",
(DEFAULT_FMT == FMT_PPM ? " (default)" : ""));
#endif
#ifdef RLE_SUPPORTED
fprintf(stderr, " -rle Select Utah RLE output format%s\n",
(DEFAULT_FMT == FMT_RLE ? " (default)" : ""));
#endif
#ifdef TARGA_SUPPORTED
fprintf(stderr, " -targa Select Targa output format%s\n",
(DEFAULT_FMT == FMT_TARGA ? " (default)" : ""));
#endif
fprintf(stderr, "Switches for advanced users:\n");
#ifdef DCT_ISLOW_SUPPORTED
fprintf(stderr, " -dct int Use integer DCT method%s\n",
(JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
#endif
#ifdef DCT_IFAST_SUPPORTED
fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
(JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
#endif
#ifdef DCT_FLOAT_SUPPORTED
fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
(JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
#endif
fprintf(stderr, " -dither fs Use F-S dithering (default)\n");
fprintf(stderr, " -dither none Don't use dithering in quantization\n");
fprintf(stderr, " -dither ordered Use ordered dither (medium speed, quality)\n");
#ifdef QUANT_2PASS_SUPPORTED
fprintf(stderr, " -map FILE Map to colors used in named image file\n");
#endif
fprintf(stderr, " -nosmooth Don't use high-quality upsampling\n");
#ifdef QUANT_1PASS_SUPPORTED
fprintf(stderr, " -onepass Use 1-pass quantization (fast, low quality)\n");
#endif
fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
fprintf(stderr, " -outfile name Specify name for output file\n");
fprintf(stderr, " -verbose or -debug Emit debug output\n");
exit(EXIT_FAILURE);
}
LOCAL(int)
parse_switches (j_decompress_ptr cinfo, int argc, char **argv,
int last_file_arg_seen, boolean for_real)
/* Parse optional switches.
* Returns argv[] index of first file-name argument (== argc if none).
* Any file names with indexes <= last_file_arg_seen are ignored;
* they have presumably been processed in a previous iteration.
* (Pass 0 for last_file_arg_seen on the first or only iteration.)
* for_real is FALSE on the first (dummy) pass; we may skip any expensive
* processing.
*/
{
int argn;
char * arg;
/* Set up default JPEG parameters. */
requested_fmt = DEFAULT_FMT; /* set default output file format */
outfilename = NULL;
cinfo->err->trace_level = 0;
/* Scan command line options, adjust parameters */
for (argn = 1; argn < argc; argn++) {
arg = argv[argn];
if (*arg != '-') {
/* Not a switch, must be a file name argument */
if (argn <= last_file_arg_seen) {
outfilename = NULL; /* -outfile applies to just one input file */
continue; /* ignore this name if previously processed */
}
break; /* else done parsing switches */
}
arg++; /* advance past switch marker character */
if (keymatch(arg, "bmp", 1)) {
/* BMP output format. */
requested_fmt = FMT_BMP;
} else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) {
/* Do color quantization. */
int val;
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%d", &val) != 1)
usage();
cinfo->desired_number_of_colors = val;
cinfo->quantize_colors = TRUE;
} else if (keymatch(arg, "dct", 2)) {
/* Select IDCT algorithm. */
if (++argn >= argc) /* advance to next argument */
usage();
if (keymatch(argv[argn], "int", 1)) {
cinfo->dct_method = JDCT_ISLOW;
} else if (keymatch(argv[argn], "fast", 2)) {
cinfo->dct_method = JDCT_IFAST;
} else if (keymatch(argv[argn], "float", 2)) {
cinfo->dct_method = JDCT_FLOAT;
} else
usage();
} else if (keymatch(arg, "dither", 2)) {
/* Select dithering algorithm. */
if (++argn >= argc) /* advance to next argument */
usage();
if (keymatch(argv[argn], "fs", 2)) {
cinfo->dither_mode = JDITHER_FS;
} else if (keymatch(argv[argn], "none", 2)) {
cinfo->dither_mode = JDITHER_NONE;
} else if (keymatch(argv[argn], "ordered", 2)) {
cinfo->dither_mode = JDITHER_ORDERED;
} else
usage();
} else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
/* Enable debug printouts. */
/* On first -d, print version identification */
static boolean printed_version = FALSE;
if (! printed_version) {
fprintf(stderr, "Independent JPEG Group's DJPEG, version %s\n%s\n",
JVERSION, JCOPYRIGHT);
printed_version = TRUE;
}
cinfo->err->trace_level++;
} else if (keymatch(arg, "fast", 1)) {
/* Select recommended processing options for quick-and-dirty output. */
cinfo->two_pass_quantize = FALSE;
cinfo->dither_mode = JDITHER_ORDERED;
if (! cinfo->quantize_colors) /* don't override an earlier -colors */
cinfo->desired_number_of_colors = 216;
cinfo->dct_method = JDCT_FASTEST;
cinfo->do_fancy_upsampling = FALSE;
} else if (keymatch(arg, "gif", 1)) {
/* GIF output format. */
requested_fmt = FMT_GIF;
} else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
/* Force monochrome output. */
cinfo->out_color_space = JCS_GRAYSCALE;
} else if (keymatch(arg, "map", 3)) {
/* Quantize to a color map taken from an input file. */
if (++argn >= argc) /* advance to next argument */
usage();
if (for_real) { /* too expensive to do twice! */
#ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */
FILE * mapfile;
if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
exit(EXIT_FAILURE);
}
read_color_map(cinfo, mapfile);
fclose(mapfile);
cinfo->quantize_colors = TRUE;
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif
}
} else if (keymatch(arg, "maxmemory", 3)) {
/* Maximum memory in Kb (or Mb with 'm'). */
long lval;
char ch = 'x';
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
usage();
if (ch == 'm' || ch == 'M')
lval *= 1000L;
cinfo->mem->max_memory_to_use = lval * 1000L;
} else if (keymatch(arg, "nosmooth", 3)) {
/* Suppress fancy upsampling */
cinfo->do_fancy_upsampling = FALSE;
} else if (keymatch(arg, "onepass", 3)) {
/* Use fast one-pass quantization. */
cinfo->two_pass_quantize = FALSE;
} else if (keymatch(arg, "os2", 3)) {
/* BMP output format (OS/2 flavor). */
requested_fmt = FMT_OS2;
} else if (keymatch(arg, "outfile", 4)) {
/* Set output file name. */
if (++argn >= argc) /* advance to next argument */
usage();
outfilename = argv[argn]; /* save it away for later use */
} else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) {
/* PPM/PGM output format. */
requested_fmt = FMT_PPM;
} else if (keymatch(arg, "rle", 1)) {
/* RLE output format. */
requested_fmt = FMT_RLE;
} else if (keymatch(arg, "scale", 1)) {
/* Scale the output image by a fraction M/N. */
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%d/%d",
&cinfo->scale_num, &cinfo->scale_denom) != 2)
usage();
} else if (keymatch(arg, "targa", 1)) {
/* Targa output format. */
requested_fmt = FMT_TARGA;
} else {
usage(); /* bogus switch */
}
}
return argn; /* return index of next arg (file name) */
}
/*
* Marker processor for COM and interesting APPn markers.
* This replaces the library's built-in processor, which just skips the marker.
* We want to print out the marker as text, to the extent possible.
* Note this code relies on a non-suspending data source.
*/
LOCAL(unsigned int)
jpeg_getc (j_decompress_ptr cinfo)
/* Read next byte */
{
struct jpeg_source_mgr * datasrc = cinfo->src;
if (datasrc->bytes_in_buffer == 0) {
if (! (*datasrc->fill_input_buffer) (cinfo))
ERREXIT(cinfo, JERR_CANT_SUSPEND);
}
datasrc->bytes_in_buffer--;
return GETJOCTET(*datasrc->next_input_byte++);
}
METHODDEF(boolean)
print_text_marker (j_decompress_ptr cinfo)
{
boolean traceit = (cinfo->err->trace_level >= 1);
INT32 length;
unsigned int ch;
unsigned int lastch = 0;
length = jpeg_getc(cinfo) << 8;
length += jpeg_getc(cinfo);
length -= 2; /* discount the length word itself */
if (traceit) {
if (cinfo->unread_marker == JPEG_COM)
fprintf(stderr, "Comment, length %ld:\n", (long) length);
else /* assume it is an APPn otherwise */
fprintf(stderr, "APP%d, length %ld:\n",
cinfo->unread_marker - JPEG_APP0, (long) length);
}
while (--length >= 0) {
ch = jpeg_getc(cinfo);
if (traceit) {
/* Emit the character in a readable form.
* Nonprintables are converted to \nnn form,
* while \ is converted to \\.
* Newlines in CR, CR/LF, or LF form will be printed as one newline.
*/
if (ch == '\r') {
fprintf(stderr, "\n");
} else if (ch == '\n') {
if (lastch != '\r')
fprintf(stderr, "\n");
} else if (ch == '\\') {
fprintf(stderr, "\\\\");
} else if (isprint(ch)) {
putc(ch, stderr);
} else {
fprintf(stderr, "\\%03o", ch);
}
lastch = ch;
}
}
if (traceit)
fprintf(stderr, "\n");
return TRUE;
}
/*
* The main program.
*/
int
main (int argc, char **argv)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
#ifdef PROGRESS_REPORT
struct cdjpeg_progress_mgr progress;
#endif
int file_index;
djpeg_dest_ptr dest_mgr = NULL;
FILE * input_file;
FILE * output_file;
JDIMENSION num_scanlines;
/* On Mac, fetch a command line. */
#ifdef USE_CCOMMAND
argc = ccommand(&argv);
#endif
progname = argv[0];
if (progname == NULL || progname[0] == 0)
progname = "djpeg"; /* in case C library doesn't provide it */
/* Initialize the JPEG decompression object with default error handling. */
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
/* Add some application-specific error messages (from cderror.h) */
jerr.addon_message_table = cdjpeg_message_table;
jerr.first_addon_message = JMSG_FIRSTADDONCODE;
jerr.last_addon_message = JMSG_LASTADDONCODE;
/* Insert custom marker processor for COM and APP12.
* APP12 is used by some digital camera makers for textual info,
* so we provide the ability to display it as text.
* If you like, additional APPn marker types can be selected for display,
* but don't try to override APP0 or APP14 this way (see libjpeg.doc).
*/
jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
/* Now safe to enable signal catcher. */
#ifdef NEED_SIGNAL_CATCHER
enable_signal_catcher((j_common_ptr) &cinfo);
#endif
/* Scan command line to find file names. */
/* It is convenient to use just one switch-parsing routine, but the switch
* values read here are ignored; we will rescan the switches after opening
* the input file.
* (Exception: tracing level set here controls verbosity for COM markers
* found during jpeg_read_header...)
*/
file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
#ifdef TWO_FILE_COMMANDLINE
/* Must have either -outfile switch or explicit output file name */
if (outfilename == NULL) {
if (file_index != argc-2) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
outfilename = argv[file_index+1];
} else {
if (file_index != argc-1) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
}
#else
/* Unix style: expect zero or one file name */
if (file_index < argc-1) {
fprintf(stderr, "%s: only one input file\n", progname);
usage();
}
#endif /* TWO_FILE_COMMANDLINE */
/* Open the input file. */
if (file_index < argc) {
if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
exit(EXIT_FAILURE);
}
} else {
/* default input file is stdin */
input_file = read_stdin();
}
/* Open the output file. */
if (outfilename != NULL) {
if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
exit(EXIT_FAILURE);
}
} else {
/* default output file is stdout */
output_file = write_stdout();
}
#ifdef PROGRESS_REPORT
start_progress_monitor((j_common_ptr) &cinfo, &progress);
#endif
/* Specify data source for decompression */
jpeg_stdio_src(&cinfo, input_file);
/* Read file header, set default decompression parameters */
(void) jpeg_read_header(&cinfo, TRUE);
/* Adjust default decompression parameters by re-parsing the options */
file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
/* Initialize the output module now to let it override any crucial
* option settings (for instance, GIF wants to force color quantization).
*/
switch (requested_fmt) {
#ifdef BMP_SUPPORTED
case FMT_BMP:
dest_mgr = jinit_write_bmp(&cinfo, FALSE);
break;
case FMT_OS2:
dest_mgr = jinit_write_bmp(&cinfo, TRUE);
break;
#endif
#ifdef GIF_SUPPORTED
case FMT_GIF:
dest_mgr = jinit_write_gif(&cinfo);
break;
#endif
#ifdef PPM_SUPPORTED
case FMT_PPM:
dest_mgr = jinit_write_ppm(&cinfo);
break;
#endif
#ifdef RLE_SUPPORTED
case FMT_RLE:
dest_mgr = jinit_write_rle(&cinfo);
break;
#endif
#ifdef TARGA_SUPPORTED
case FMT_TARGA:
dest_mgr = jinit_write_targa(&cinfo);
break;
#endif
default:
ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
break;
}
dest_mgr->output_file = output_file;
/* Start decompressor */
(void) jpeg_start_decompress(&cinfo);
/* Write output file header */
(*dest_mgr->start_output) (&cinfo, dest_mgr);
/* Process data */
while (cinfo.output_scanline < cinfo.output_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
#ifdef PROGRESS_REPORT
/* Hack: count final pass as done in case finish_output does an extra pass.
* The library won't have updated completed_passes.
*/
progress.pub.completed_passes = progress.pub.total_passes;
#endif
/* Finish decompression and release memory.
* I must do it in this order because output module has allocated memory
* of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
*/
(*dest_mgr->finish_output) (&cinfo, dest_mgr);
(void) jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
/* Close files, if we opened them */
if (input_file != stdin)
fclose(input_file);
if (output_file != stdout)
fclose(output_file);
#ifdef PROGRESS_REPORT
end_progress_monitor((j_common_ptr) &cinfo);
#endif
/* All done. */
exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
return 0; /* suppress no-return-value warnings */
}

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/*
* example.c
*
* This file illustrates how to use the IJG code as a subroutine library
* to read or write JPEG image files. You should look at this code in
* conjunction with the documentation file libjpeg.doc.
*
* This code will not do anything useful as-is, but it may be helpful as a
* skeleton for constructing routines that call the JPEG library.
*
* We present these routines in the same coding style used in the JPEG code
* (ANSI function definitions, etc); but you are of course free to code your
* routines in a different style if you prefer.
*/
#include <stdio.h>
/*
* Include file for users of JPEG library.
* You will need to have included system headers that define at least
* the typedefs FILE and size_t before you can include jpeglib.h.
* (stdio.h is sufficient on ANSI-conforming systems.)
* You may also wish to include "jerror.h".
*/
#include "jpeglib.h"
/*
* <setjmp.h> is used for the optional error recovery mechanism shown in
* the second part of the example.
*/
#include <setjmp.h>
/******************** JPEG COMPRESSION SAMPLE INTERFACE *******************/
/* This half of the example shows how to feed data into the JPEG compressor.
* We present a minimal version that does not worry about refinements such
* as error recovery (the JPEG code will just exit() if it gets an error).
*/
/*
* IMAGE DATA FORMATS:
*
* The standard input image format is a rectangular array of pixels, with
* each pixel having the same number of "component" values (color channels).
* Each pixel row is an array of JSAMPLEs (which typically are unsigned chars).
* If you are working with color data, then the color values for each pixel
* must be adjacent in the row; for example, R,G,B,R,G,B,R,G,B,... for 24-bit
* RGB color.
*
* For this example, we'll assume that this data structure matches the way
* our application has stored the image in memory, so we can just pass a
* pointer to our image buffer. In particular, let's say that the image is
* RGB color and is described by:
*/
extern JSAMPLE * image_buffer; /* Points to large array of R,G,B-order data */
extern int image_height; /* Number of rows in image */
extern int image_width; /* Number of columns in image */
/*
* Sample routine for JPEG compression. We assume that the target file name
* and a compression quality factor are passed in.
*/
GLOBAL(void)
write_JPEG_file (char * filename, int quality)
{
/* This struct contains the JPEG compression parameters and pointers to
* working space (which is allocated as needed by the JPEG library).
* It is possible to have several such structures, representing multiple
* compression/decompression processes, in existence at once. We refer
* to any one struct (and its associated working data) as a "JPEG object".
*/
struct jpeg_compress_struct cinfo;
/* This struct represents a JPEG error handler. It is declared separately
* because applications often want to supply a specialized error handler
* (see the second half of this file for an example). But here we just
* take the easy way out and use the standard error handler, which will
* print a message on stderr and call exit() if compression fails.
* Note that this struct must live as long as the main JPEG parameter
* struct, to avoid dangling-pointer problems.
*/
struct jpeg_error_mgr jerr;
/* More stuff */
FILE * outfile; /* target file */
JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */
int row_stride; /* physical row width in image buffer */
/* Step 1: allocate and initialize JPEG compression object */
/* We have to set up the error handler first, in case the initialization
* step fails. (Unlikely, but it could happen if you are out of memory.)
* This routine fills in the contents of struct jerr, and returns jerr's
* address which we place into the link field in cinfo.
*/
cinfo.err = jpeg_std_error(&jerr);
/* Now we can initialize the JPEG compression object. */
jpeg_create_compress(&cinfo);
/* Step 2: specify data destination (eg, a file) */
/* Note: steps 2 and 3 can be done in either order. */
/* Here we use the library-supplied code to send compressed data to a
* stdio stream. You can also write your own code to do something else.
* VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
* requires it in order to write binary files.
*/
if ((outfile = fopen(filename, "wb")) == NULL) {
fprintf(stderr, "can't open %s\n", filename);
exit(1);
}
jpeg_stdio_dest(&cinfo, outfile);
/* Step 3: set parameters for compression */
/* First we supply a description of the input image.
* Four fields of the cinfo struct must be filled in:
*/
cinfo.image_width = image_width; /* image width and height, in pixels */
cinfo.image_height = image_height;
cinfo.input_components = 3; /* # of color components per pixel */
cinfo.in_color_space = JCS_RGB; /* colorspace of input image */
/* Now use the library's routine to set default compression parameters.
* (You must set at least cinfo.in_color_space before calling this,
* since the defaults depend on the source color space.)
*/
jpeg_set_defaults(&cinfo);
/* Now you can set any non-default parameters you wish to.
* Here we just illustrate the use of quality (quantization table) scaling:
*/
jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
/* Step 4: Start compressor */
/* TRUE ensures that we will write a complete interchange-JPEG file.
* Pass TRUE unless you are very sure of what you're doing.
*/
jpeg_start_compress(&cinfo, TRUE);
/* Step 5: while (scan lines remain to be written) */
/* jpeg_write_scanlines(...); */
/* Here we use the library's state variable cinfo.next_scanline as the
* loop counter, so that we don't have to keep track ourselves.
* To keep things simple, we pass one scanline per call; you can pass
* more if you wish, though.
*/
row_stride = image_width * 3; /* JSAMPLEs per row in image_buffer */
while (cinfo.next_scanline < cinfo.image_height) {
/* jpeg_write_scanlines expects an array of pointers to scanlines.
* Here the array is only one element long, but you could pass
* more than one scanline at a time if that's more convenient.
*/
row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
(void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
/* Step 6: Finish compression */
jpeg_finish_compress(&cinfo);
/* After finish_compress, we can close the output file. */
fclose(outfile);
/* Step 7: release JPEG compression object */
/* This is an important step since it will release a good deal of memory. */
jpeg_destroy_compress(&cinfo);
/* And we're done! */
}
/*
* SOME FINE POINTS:
*
* In the above loop, we ignored the return value of jpeg_write_scanlines,
* which is the number of scanlines actually written. We could get away
* with this because we were only relying on the value of cinfo.next_scanline,
* which will be incremented correctly. If you maintain additional loop
* variables then you should be careful to increment them properly.
* Actually, for output to a stdio stream you needn't worry, because
* then jpeg_write_scanlines will write all the lines passed (or else exit
* with a fatal error). Partial writes can only occur if you use a data
* destination module that can demand suspension of the compressor.
* (If you don't know what that's for, you don't need it.)
*
* If the compressor requires full-image buffers (for entropy-coding
* optimization or a multi-scan JPEG file), it will create temporary
* files for anything that doesn't fit within the maximum-memory setting.
* (Note that temp files are NOT needed if you use the default parameters.)
* On some systems you may need to set up a signal handler to ensure that
* temporary files are deleted if the program is interrupted. See libjpeg.doc.
*
* Scanlines MUST be supplied in top-to-bottom order if you want your JPEG
* files to be compatible with everyone else's. If you cannot readily read
* your data in that order, you'll need an intermediate array to hold the
* image. See rdtarga.c or rdbmp.c for examples of handling bottom-to-top
* source data using the JPEG code's internal virtual-array mechanisms.
*/
/******************** JPEG DECOMPRESSION SAMPLE INTERFACE *******************/
/* This half of the example shows how to read data from the JPEG decompressor.
* It's a bit more refined than the above, in that we show:
* (a) how to modify the JPEG library's standard error-reporting behavior;
* (b) how to allocate workspace using the library's memory manager.
*
* Just to make this example a little different from the first one, we'll
* assume that we do not intend to put the whole image into an in-memory
* buffer, but to send it line-by-line someplace else. We need a one-
* scanline-high JSAMPLE array as a work buffer, and we will let the JPEG
* memory manager allocate it for us. This approach is actually quite useful
* because we don't need to remember to deallocate the buffer separately: it
* will go away automatically when the JPEG object is cleaned up.
*/
/*
* ERROR HANDLING:
*
* The JPEG library's standard error handler (jerror.c) is divided into
* several "methods" which you can override individually. This lets you
* adjust the behavior without duplicating a lot of code, which you might
* have to update with each future release.
*
* Our example here shows how to override the "error_exit" method so that
* control is returned to the library's caller when a fatal error occurs,
* rather than calling exit() as the standard error_exit method does.
*
* We use C's setjmp/longjmp facility to return control. This means that the
* routine which calls the JPEG library must first execute a setjmp() call to
* establish the return point. We want the replacement error_exit to do a
* longjmp(). But we need to make the setjmp buffer accessible to the
* error_exit routine. To do this, we make a private extension of the
* standard JPEG error handler object. (If we were using C++, we'd say we
* were making a subclass of the regular error handler.)
*
* Here's the extended error handler struct:
*/
struct my_error_mgr {
struct jpeg_error_mgr pub; /* "public" fields */
jmp_buf setjmp_buffer; /* for return to caller */
};
typedef struct my_error_mgr * my_error_ptr;
/*
* Here's the routine that will replace the standard error_exit method:
*/
METHODDEF(void)
my_error_exit (j_common_ptr cinfo)
{
/* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
my_error_ptr myerr = (my_error_ptr) cinfo->err;
/* Always display the message. */
/* We could postpone this until after returning, if we chose. */
(*cinfo->err->output_message) (cinfo);
/* Return control to the setjmp point */
longjmp(myerr->setjmp_buffer, 1);
}
/*
* Sample routine for JPEG decompression. We assume that the source file name
* is passed in. We want to return 1 on success, 0 on error.
*/
GLOBAL(int)
read_JPEG_file (char * filename)
{
/* This struct contains the JPEG decompression parameters and pointers to
* working space (which is allocated as needed by the JPEG library).
*/
struct jpeg_decompress_struct cinfo;
/* We use our private extension JPEG error handler.
* Note that this struct must live as long as the main JPEG parameter
* struct, to avoid dangling-pointer problems.
*/
struct my_error_mgr jerr;
/* More stuff */
FILE * infile; /* source file */
JSAMPARRAY buffer; /* Output row buffer */
int row_stride; /* physical row width in output buffer */
/* In this example we want to open the input file before doing anything else,
* so that the setjmp() error recovery below can assume the file is open.
* VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
* requires it in order to read binary files.
*/
if ((infile = fopen(filename, "rb")) == NULL) {
fprintf(stderr, "can't open %s\n", filename);
return 0;
}
/* Step 1: allocate and initialize JPEG decompression object */
/* We set up the normal JPEG error routines, then override error_exit. */
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
/* Establish the setjmp return context for my_error_exit to use. */
if (setjmp(jerr.setjmp_buffer)) {
/* If we get here, the JPEG code has signaled an error.
* We need to clean up the JPEG object, close the input file, and return.
*/
jpeg_destroy_decompress(&cinfo);
fclose(infile);
return 0;
}
/* Now we can initialize the JPEG decompression object. */
jpeg_create_decompress(&cinfo);
/* Step 2: specify data source (eg, a file) */
jpeg_stdio_src(&cinfo, infile);
/* Step 3: read file parameters with jpeg_read_header() */
(void) jpeg_read_header(&cinfo, TRUE);
/* We can ignore the return value from jpeg_read_header since
* (a) suspension is not possible with the stdio data source, and
* (b) we passed TRUE to reject a tables-only JPEG file as an error.
* See libjpeg.doc for more info.
*/
/* Step 4: set parameters for decompression */
/* In this example, we don't need to change any of the defaults set by
* jpeg_read_header(), so we do nothing here.
*/
/* Step 5: Start decompressor */
(void) jpeg_start_decompress(&cinfo);
/* We can ignore the return value since suspension is not possible
* with the stdio data source.
*/
/* We may need to do some setup of our own at this point before reading
* the data. After jpeg_start_decompress() we have the correct scaled
* output image dimensions available, as well as the output colormap
* if we asked for color quantization.
* In this example, we need to make an output work buffer of the right size.
*/
/* JSAMPLEs per row in output buffer */
row_stride = cinfo.output_width * cinfo.output_components;
/* Make a one-row-high sample array that will go away when done with image */
buffer = (*cinfo.mem->alloc_sarray)
((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
/* Step 6: while (scan lines remain to be read) */
/* jpeg_read_scanlines(...); */
/* Here we use the library's state variable cinfo.output_scanline as the
* loop counter, so that we don't have to keep track ourselves.
*/
while (cinfo.output_scanline < cinfo.output_height) {
/* jpeg_read_scanlines expects an array of pointers to scanlines.
* Here the array is only one element long, but you could ask for
* more than one scanline at a time if that's more convenient.
*/
(void) jpeg_read_scanlines(&cinfo, buffer, 1);
/* Assume put_scanline_someplace wants a pointer and sample count. */
put_scanline_someplace(buffer[0], row_stride);
}
/* Step 7: Finish decompression */
(void) jpeg_finish_decompress(&cinfo);
/* We can ignore the return value since suspension is not possible
* with the stdio data source.
*/
/* Step 8: Release JPEG decompression object */
/* This is an important step since it will release a good deal of memory. */
jpeg_destroy_decompress(&cinfo);
/* After finish_decompress, we can close the input file.
* Here we postpone it until after no more JPEG errors are possible,
* so as to simplify the setjmp error logic above. (Actually, I don't
* think that jpeg_destroy can do an error exit, but why assume anything...)
*/
fclose(infile);
/* At this point you may want to check to see whether any corrupt-data
* warnings occurred (test whether jerr.pub.num_warnings is nonzero).
*/
/* And we're done! */
return 1;
}
/*
* SOME FINE POINTS:
*
* In the above code, we ignored the return value of jpeg_read_scanlines,
* which is the number of scanlines actually read. We could get away with
* this because we asked for only one line at a time and we weren't using
* a suspending data source. See libjpeg.doc for more info.
*
* We cheated a bit by calling alloc_sarray() after jpeg_start_decompress();
* we should have done it beforehand to ensure that the space would be
* counted against the JPEG max_memory setting. In some systems the above
* code would risk an out-of-memory error. However, in general we don't
* know the output image dimensions before jpeg_start_decompress(), unless we
* call jpeg_calc_output_dimensions(). See libjpeg.doc for more about this.
*
* Scanlines are returned in the same order as they appear in the JPEG file,
* which is standardly top-to-bottom. If you must emit data bottom-to-top,
* you can use one of the virtual arrays provided by the JPEG memory manager
* to invert the data. See wrbmp.c for an example.
*
* As with compression, some operating modes may require temporary files.
* On some systems you may need to set up a signal handler to ensure that
* temporary files are deleted if the program is interrupted. See libjpeg.doc.
*/

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IJG JPEG LIBRARY: FILE LIST
Copyright (C) 1994-1998, Thomas G. Lane.
This file is part of the Independent JPEG Group's software.
For conditions of distribution and use, see the accompanying README file.
Here is a road map to the files in the IJG JPEG distribution. The
distribution includes the JPEG library proper, plus two application
programs ("cjpeg" and "djpeg") which use the library to convert JPEG
files to and from some other popular image formats. A third application
"jpegtran" uses the library to do lossless conversion between different
variants of JPEG. There are also two stand-alone applications,
"rdjpgcom" and "wrjpgcom".
THE JPEG LIBRARY
================
Include files:
jpeglib.h JPEG library's exported data and function declarations.
jconfig.h Configuration declarations. Note: this file is not present
in the distribution; it is generated during installation.
jmorecfg.h Additional configuration declarations; need not be changed
for a standard installation.
jerror.h Declares JPEG library's error and trace message codes.
jinclude.h Central include file used by all IJG .c files to reference
system include files.
jpegint.h JPEG library's internal data structures.
jchuff.h Private declarations for Huffman encoder modules.
jdhuff.h Private declarations for Huffman decoder modules.
jdct.h Private declarations for forward & reverse DCT subsystems.
jmemsys.h Private declarations for memory management subsystem.
jversion.h Version information.
Applications using the library should include jpeglib.h (which in turn
includes jconfig.h and jmorecfg.h). Optionally, jerror.h may be included
if the application needs to reference individual JPEG error codes. The
other include files are intended for internal use and would not normally
be included by an application program. (cjpeg/djpeg/etc do use jinclude.h,
since its function is to improve portability of the whole IJG distribution.
Most other applications will directly include the system include files they
want, and hence won't need jinclude.h.)
C source code files:
These files contain most of the functions intended to be called directly by
an application program:
jcapimin.c Application program interface: core routines for compression.
jcapistd.c Application program interface: standard compression.
jdapimin.c Application program interface: core routines for decompression.
jdapistd.c Application program interface: standard decompression.
jcomapi.c Application program interface routines common to compression
and decompression.
jcparam.c Compression parameter setting helper routines.
jctrans.c API and library routines for transcoding compression.
jdtrans.c API and library routines for transcoding decompression.
Compression side of the library:
jcinit.c Initialization: determines which other modules to use.
jcmaster.c Master control: setup and inter-pass sequencing logic.
jcmainct.c Main buffer controller (preprocessor => JPEG compressor).
jcprepct.c Preprocessor buffer controller.
jccoefct.c Buffer controller for DCT coefficient buffer.
jccolor.c Color space conversion.
jcsample.c Downsampling.
jcdctmgr.c DCT manager (DCT implementation selection & control).
jfdctint.c Forward DCT using slow-but-accurate integer method.
jfdctfst.c Forward DCT using faster, less accurate integer method.
jfdctflt.c Forward DCT using floating-point arithmetic.
jchuff.c Huffman entropy coding for sequential JPEG.
jcphuff.c Huffman entropy coding for progressive JPEG.
jcmarker.c JPEG marker writing.
jdatadst.c Data destination manager for stdio output.
Decompression side of the library:
jdmaster.c Master control: determines which other modules to use.
jdinput.c Input controller: controls input processing modules.
jdmainct.c Main buffer controller (JPEG decompressor => postprocessor).
jdcoefct.c Buffer controller for DCT coefficient buffer.
jdpostct.c Postprocessor buffer controller.
jdmarker.c JPEG marker reading.
jdhuff.c Huffman entropy decoding for sequential JPEG.
jdphuff.c Huffman entropy decoding for progressive JPEG.
jddctmgr.c IDCT manager (IDCT implementation selection & control).
jidctint.c Inverse DCT using slow-but-accurate integer method.
jidctfst.c Inverse DCT using faster, less accurate integer method.
jidctflt.c Inverse DCT using floating-point arithmetic.
jidctred.c Inverse DCTs with reduced-size outputs.
jdsample.c Upsampling.
jdcolor.c Color space conversion.
jdmerge.c Merged upsampling/color conversion (faster, lower quality).
jquant1.c One-pass color quantization using a fixed-spacing colormap.
jquant2.c Two-pass color quantization using a custom-generated colormap.
Also handles one-pass quantization to an externally given map.
jdatasrc.c Data source manager for stdio input.
Support files for both compression and decompression:
jerror.c Standard error handling routines (application replaceable).
jmemmgr.c System-independent (more or less) memory management code.
jutils.c Miscellaneous utility routines.
jmemmgr.c relies on a system-dependent memory management module. The IJG
distribution includes the following implementations of the system-dependent
module:
jmemnobs.c "No backing store": assumes adequate virtual memory exists.
jmemansi.c Makes temporary files with ANSI-standard routine tmpfile().
jmemname.c Makes temporary files with program-generated file names.
jmemdos.c Custom implementation for MS-DOS (16-bit environment only):
can use extended and expanded memory as well as temp files.
jmemmac.c Custom implementation for Apple Macintosh.
Exactly one of the system-dependent modules should be configured into an
installed JPEG library (see install.doc for hints about which one to use).
On unusual systems you may find it worthwhile to make a special
system-dependent memory manager.
Non-C source code files:
jmemdosa.asm 80x86 assembly code support for jmemdos.c; used only in
MS-DOS-specific configurations of the JPEG library.
CJPEG/DJPEG/JPEGTRAN
====================
Include files:
cdjpeg.h Declarations shared by cjpeg/djpeg/jpegtran modules.
cderror.h Additional error and trace message codes for cjpeg et al.
transupp.h Declarations for jpegtran support routines in transupp.c.
C source code files:
cjpeg.c Main program for cjpeg.
djpeg.c Main program for djpeg.
jpegtran.c Main program for jpegtran.
cdjpeg.c Utility routines used by all three programs.
rdcolmap.c Code to read a colormap file for djpeg's "-map" switch.
rdswitch.c Code to process some of cjpeg's more complex switches.
Also used by jpegtran.
transupp.c Support code for jpegtran: lossless image manipulations.
Image file reader modules for cjpeg:
rdbmp.c BMP file input.
rdgif.c GIF file input (now just a stub).
rdppm.c PPM/PGM file input.
rdrle.c Utah RLE file input.
rdtarga.c Targa file input.
Image file writer modules for djpeg:
wrbmp.c BMP file output.
wrgif.c GIF file output (a mere shadow of its former self).
wrppm.c PPM/PGM file output.
wrrle.c Utah RLE file output.
wrtarga.c Targa file output.
RDJPGCOM/WRJPGCOM
=================
C source code files:
rdjpgcom.c Stand-alone rdjpgcom application.
wrjpgcom.c Stand-alone wrjpgcom application.
These programs do not depend on the IJG library. They do use
jconfig.h and jinclude.h, only to improve portability.
ADDITIONAL FILES
================
Documentation (see README for a guide to the documentation files):
README Master documentation file.
*.doc Other documentation files.
*.1 Documentation in Unix man page format.
change.log Version-to-version change highlights.
example.c Sample code for calling JPEG library.
Configuration/installation files and programs (see install.doc for more info):
configure Unix shell script to perform automatic configuration.
ltconfig Support scripts for configure (from GNU libtool).
ltmain.sh
config.guess
config.sub
install-sh Install shell script for those Unix systems lacking one.
ckconfig.c Program to generate jconfig.h on non-Unix systems.
jconfig.doc Template for making jconfig.h by hand.
makefile.* Sample makefiles for particular systems.
jconfig.* Sample jconfig.h for particular systems.
ansi2knr.c De-ANSIfier for pre-ANSI C compilers (courtesy of
L. Peter Deutsch and Aladdin Enterprises).
Test files (see install.doc for test procedure):
test*.* Source and comparison files for confidence test.
These are binary image files, NOT text files.

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#!/bin/sh
#
# install - install a program, script, or datafile
# This comes from X11R5 (mit/util/scripts/install.sh).
#
# Copyright 1991 by the Massachusetts Institute of Technology
#
# Permission to use, copy, modify, distribute, and sell this software and its
# documentation for any purpose is hereby granted without fee, provided that
# the above copyright notice appear in all copies and that both that
# copyright notice and this permission notice appear in supporting
# documentation, and that the name of M.I.T. not be used in advertising or
# publicity pertaining to distribution of the software without specific,
# written prior permission. M.I.T. makes no representations about the
# suitability of this software for any purpose. It is provided "as is"
# without express or implied warranty.
#
# Calling this script install-sh is preferred over install.sh, to prevent
# `make' implicit rules from creating a file called install from it
# when there is no Makefile.
#
# This script is compatible with the BSD install script, but was written
# from scratch. It can only install one file at a time, a restriction
# shared with many OS's install programs.
# set DOITPROG to echo to test this script
# Don't use :- since 4.3BSD and earlier shells don't like it.
doit="${DOITPROG-}"
# put in absolute paths if you don't have them in your path; or use env. vars.
mvprog="${MVPROG-mv}"
cpprog="${CPPROG-cp}"
chmodprog="${CHMODPROG-chmod}"
chownprog="${CHOWNPROG-chown}"
chgrpprog="${CHGRPPROG-chgrp}"
stripprog="${STRIPPROG-strip}"
rmprog="${RMPROG-rm}"
mkdirprog="${MKDIRPROG-mkdir}"
transformbasename=""
transform_arg=""
instcmd="$mvprog"
chmodcmd="$chmodprog 0755"
chowncmd=""
chgrpcmd=""
stripcmd=""
rmcmd="$rmprog -f"
mvcmd="$mvprog"
src=""
dst=""
dir_arg=""
while [ x"$1" != x ]; do
case $1 in
-c) instcmd="$cpprog"
shift
continue;;
-d) dir_arg=true
shift
continue;;
-m) chmodcmd="$chmodprog $2"
shift
shift
continue;;
-o) chowncmd="$chownprog $2"
shift
shift
continue;;
-g) chgrpcmd="$chgrpprog $2"
shift
shift
continue;;
-s) stripcmd="$stripprog"
shift
continue;;
-t=*) transformarg=`echo $1 | sed 's/-t=//'`
shift
continue;;
-b=*) transformbasename=`echo $1 | sed 's/-b=//'`
shift
continue;;
*) if [ x"$src" = x ]
then
src=$1
else
# this colon is to work around a 386BSD /bin/sh bug
:
dst=$1
fi
shift
continue;;
esac
done
if [ x"$src" = x ]
then
echo "install: no input file specified"
exit 1
else
true
fi
if [ x"$dir_arg" != x ]; then
dst=$src
src=""
if [ -d $dst ]; then
instcmd=:
else
instcmd=mkdir
fi
else
# Waiting for this to be detected by the "$instcmd $src $dsttmp" command
# might cause directories to be created, which would be especially bad
# if $src (and thus $dsttmp) contains '*'.
if [ -f $src -o -d $src ]
then
true
else
echo "install: $src does not exist"
exit 1
fi
if [ x"$dst" = x ]
then
echo "install: no destination specified"
exit 1
else
true
fi
# If destination is a directory, append the input filename; if your system
# does not like double slashes in filenames, you may need to add some logic
if [ -d $dst ]
then
dst="$dst"/`basename $src`
else
true
fi
fi
## this sed command emulates the dirname command
dstdir=`echo $dst | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
# Make sure that the destination directory exists.
# this part is taken from Noah Friedman's mkinstalldirs script
# Skip lots of stat calls in the usual case.
if [ ! -d "$dstdir" ]; then
defaultIFS='
'
IFS="${IFS-${defaultIFS}}"
oIFS="${IFS}"
# Some sh's can't handle IFS=/ for some reason.
IFS='%'
set - `echo ${dstdir} | sed -e 's@/@%@g' -e 's@^%@/@'`
IFS="${oIFS}"
pathcomp=''
while [ $# -ne 0 ] ; do
pathcomp="${pathcomp}${1}"
shift
if [ ! -d "${pathcomp}" ] ;
then
$mkdirprog "${pathcomp}"
else
true
fi
pathcomp="${pathcomp}/"
done
fi
if [ x"$dir_arg" != x ]
then
$doit $instcmd $dst &&
if [ x"$chowncmd" != x ]; then $doit $chowncmd $dst; else true ; fi &&
if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi &&
if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi &&
if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi
else
# If we're going to rename the final executable, determine the name now.
if [ x"$transformarg" = x ]
then
dstfile=`basename $dst`
else
dstfile=`basename $dst $transformbasename |
sed $transformarg`$transformbasename
fi
# don't allow the sed command to completely eliminate the filename
if [ x"$dstfile" = x ]
then
dstfile=`basename $dst`
else
true
fi
# Make a temp file name in the proper directory.
dsttmp=$dstdir/#inst.$$#
# Move or copy the file name to the temp name
$doit $instcmd $src $dsttmp &&
trap "rm -f ${dsttmp}" 0 &&
# and set any options; do chmod last to preserve setuid bits
# If any of these fail, we abort the whole thing. If we want to
# ignore errors from any of these, just make sure not to ignore
# errors from the above "$doit $instcmd $src $dsttmp" command.
if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi &&
if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi &&
if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi &&
if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi &&
# Now rename the file to the real destination.
$doit $rmcmd -f $dstdir/$dstfile &&
$doit $mvcmd $dsttmp $dstdir/$dstfile
fi &&
exit 0

1063
src/3rdparty/src/jpeg-6b/install.doc vendored
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280
src/3rdparty/src/jpeg-6b/jcapimin.c vendored
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@ -1,280 +0,0 @@
/*
* jcapimin.c
*
* Copyright (C) 1994-1998, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains application interface code for the compression half
* of the JPEG library. These are the "minimum" API routines that may be
* needed in either the normal full-compression case or the transcoding-only
* case.
*
* Most of the routines intended to be called directly by an application
* are in this file or in jcapistd.c. But also see jcparam.c for
* parameter-setup helper routines, jcomapi.c for routines shared by
* compression and decompression, and jctrans.c for the transcoding case.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/*
* Initialization of a JPEG compression object.
* The error manager must already be set up (in case memory manager fails).
*/
GLOBAL(void)
jpeg_CreateCompress (j_compress_ptr cinfo, int version, size_t structsize)
{
int i;
/* Guard against version mismatches between library and caller. */
cinfo->mem = NULL; /* so jpeg_destroy knows mem mgr not called */
if (version != JPEG_LIB_VERSION)
ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
if (structsize != SIZEOF(struct jpeg_compress_struct))
ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE,
(int) SIZEOF(struct jpeg_compress_struct), (int) structsize);
/* For debugging purposes, we zero the whole master structure.
* But the application has already set the err pointer, and may have set
* client_data, so we have to save and restore those fields.
* Note: if application hasn't set client_data, tools like Purify may
* complain here.
*/
{
struct jpeg_error_mgr * err = cinfo->err;
void * client_data = cinfo->client_data; /* ignore Purify complaint here */
MEMZERO(cinfo, SIZEOF(struct jpeg_compress_struct));
cinfo->err = err;
cinfo->client_data = client_data;
}
cinfo->is_decompressor = FALSE;
/* Initialize a memory manager instance for this object */
jinit_memory_mgr((j_common_ptr) cinfo);
/* Zero out pointers to permanent structures. */
cinfo->progress = NULL;
cinfo->dest = NULL;
cinfo->comp_info = NULL;
for (i = 0; i < NUM_QUANT_TBLS; i++)
cinfo->quant_tbl_ptrs[i] = NULL;
for (i = 0; i < NUM_HUFF_TBLS; i++) {
cinfo->dc_huff_tbl_ptrs[i] = NULL;
cinfo->ac_huff_tbl_ptrs[i] = NULL;
}
cinfo->script_space = NULL;
cinfo->input_gamma = 1.0; /* in case application forgets */
/* OK, I'm ready */
cinfo->global_state = CSTATE_START;
}
/*
* Destruction of a JPEG compression object
*/
GLOBAL(void)
jpeg_destroy_compress (j_compress_ptr cinfo)
{
jpeg_destroy((j_common_ptr) cinfo); /* use common routine */
}
/*
* Abort processing of a JPEG compression operation,
* but don't destroy the object itself.
*/
GLOBAL(void)
jpeg_abort_compress (j_compress_ptr cinfo)
{
jpeg_abort((j_common_ptr) cinfo); /* use common routine */
}
/*
* Forcibly suppress or un-suppress all quantization and Huffman tables.
* Marks all currently defined tables as already written (if suppress)
* or not written (if !suppress). This will control whether they get emitted
* by a subsequent jpeg_start_compress call.
*
* This routine is exported for use by applications that want to produce
* abbreviated JPEG datastreams. It logically belongs in jcparam.c, but
* since it is called by jpeg_start_compress, we put it here --- otherwise
* jcparam.o would be linked whether the application used it or not.
*/
GLOBAL(void)
jpeg_suppress_tables (j_compress_ptr cinfo, boolean suppress)
{
int i;
JQUANT_TBL * qtbl;
JHUFF_TBL * htbl;
for (i = 0; i < NUM_QUANT_TBLS; i++) {
if ((qtbl = cinfo->quant_tbl_ptrs[i]) != NULL)
qtbl->sent_table = suppress;
}
for (i = 0; i < NUM_HUFF_TBLS; i++) {
if ((htbl = cinfo->dc_huff_tbl_ptrs[i]) != NULL)
htbl->sent_table = suppress;
if ((htbl = cinfo->ac_huff_tbl_ptrs[i]) != NULL)
htbl->sent_table = suppress;
}
}
/*
* Finish JPEG compression.
*
* If a multipass operating mode was selected, this may do a great deal of
* work including most of the actual output.
*/
GLOBAL(void)
jpeg_finish_compress (j_compress_ptr cinfo)
{
JDIMENSION iMCU_row;
if (cinfo->global_state == CSTATE_SCANNING ||
cinfo->global_state == CSTATE_RAW_OK) {
/* Terminate first pass */
if (cinfo->next_scanline < cinfo->image_height)
ERREXIT(cinfo, JERR_TOO_LITTLE_DATA);
(*cinfo->master->finish_pass) (cinfo);
} else if (cinfo->global_state != CSTATE_WRCOEFS)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* Perform any remaining passes */
while (! cinfo->master->is_last_pass) {
(*cinfo->master->prepare_for_pass) (cinfo);
for (iMCU_row = 0; iMCU_row < cinfo->total_iMCU_rows; iMCU_row++) {
if (cinfo->progress != NULL) {
cinfo->progress->pass_counter = (long) iMCU_row;
cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows;
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
}
/* We bypass the main controller and invoke coef controller directly;
* all work is being done from the coefficient buffer.
*/
if (! (*cinfo->coef->compress_data) (cinfo, (JSAMPIMAGE) NULL))
ERREXIT(cinfo, JERR_CANT_SUSPEND);
}
(*cinfo->master->finish_pass) (cinfo);
}
/* Write EOI, do final cleanup */
(*cinfo->marker->write_file_trailer) (cinfo);
(*cinfo->dest->term_destination) (cinfo);
/* We can use jpeg_abort to release memory and reset global_state */
jpeg_abort((j_common_ptr) cinfo);
}
/*
* Write a special marker.
* This is only recommended for writing COM or APPn markers.
* Must be called after jpeg_start_compress() and before
* first call to jpeg_write_scanlines() or jpeg_write_raw_data().
*/
GLOBAL(void)
jpeg_write_marker (j_compress_ptr cinfo, int marker,
const JOCTET *dataptr, unsigned int datalen)
{
JMETHOD(void, write_marker_byte, (j_compress_ptr info, int val));
if (cinfo->next_scanline != 0 ||
(cinfo->global_state != CSTATE_SCANNING &&
cinfo->global_state != CSTATE_RAW_OK &&
cinfo->global_state != CSTATE_WRCOEFS))
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
(*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
write_marker_byte = cinfo->marker->write_marker_byte; /* copy for speed */
while (datalen--) {
(*write_marker_byte) (cinfo, *dataptr);
dataptr++;
}
}
/* Same, but piecemeal. */
GLOBAL(void)
jpeg_write_m_header (j_compress_ptr cinfo, int marker, unsigned int datalen)
{
if (cinfo->next_scanline != 0 ||
(cinfo->global_state != CSTATE_SCANNING &&
cinfo->global_state != CSTATE_RAW_OK &&
cinfo->global_state != CSTATE_WRCOEFS))
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
(*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
}
GLOBAL(void)
jpeg_write_m_byte (j_compress_ptr cinfo, int val)
{
(*cinfo->marker->write_marker_byte) (cinfo, val);
}
/*
* Alternate compression function: just write an abbreviated table file.
* Before calling this, all parameters and a data destination must be set up.
*
* To produce a pair of files containing abbreviated tables and abbreviated
* image data, one would proceed as follows:
*
* initialize JPEG object
* set JPEG parameters
* set destination to table file
* jpeg_write_tables(cinfo);
* set destination to image file
* jpeg_start_compress(cinfo, FALSE);
* write data...
* jpeg_finish_compress(cinfo);
*
* jpeg_write_tables has the side effect of marking all tables written
* (same as jpeg_suppress_tables(..., TRUE)). Thus a subsequent start_compress
* will not re-emit the tables unless it is passed write_all_tables=TRUE.
*/
GLOBAL(void)
jpeg_write_tables (j_compress_ptr cinfo)
{
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* (Re)initialize error mgr and destination modules */
(*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
(*cinfo->dest->init_destination) (cinfo);
/* Initialize the marker writer ... bit of a crock to do it here. */
jinit_marker_writer(cinfo);
/* Write them tables! */
(*cinfo->marker->write_tables_only) (cinfo);
/* And clean up. */
(*cinfo->dest->term_destination) (cinfo);
/*
* In library releases up through v6a, we called jpeg_abort() here to free
* any working memory allocated by the destination manager and marker
* writer. Some applications had a problem with that: they allocated space
* of their own from the library memory manager, and didn't want it to go
* away during write_tables. So now we do nothing. This will cause a
* memory leak if an app calls write_tables repeatedly without doing a full
* compression cycle or otherwise resetting the JPEG object. However, that
* seems less bad than unexpectedly freeing memory in the normal case.
* An app that prefers the old behavior can call jpeg_abort for itself after
* each call to jpeg_write_tables().
*/
}

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src/3rdparty/src/jpeg-6b/jcapistd.c vendored
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@ -1,161 +0,0 @@
/*
* jcapistd.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains application interface code for the compression half
* of the JPEG library. These are the "standard" API routines that are
* used in the normal full-compression case. They are not used by a
* transcoding-only application. Note that if an application links in
* jpeg_start_compress, it will end up linking in the entire compressor.
* We thus must separate this file from jcapimin.c to avoid linking the
* whole compression library into a transcoder.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/*
* Compression initialization.
* Before calling this, all parameters and a data destination must be set up.
*
* We require a write_all_tables parameter as a failsafe check when writing
* multiple datastreams from the same compression object. Since prior runs
* will have left all the tables marked sent_table=TRUE, a subsequent run
* would emit an abbreviated stream (no tables) by default. This may be what
* is wanted, but for safety's sake it should not be the default behavior:
* programmers should have to make a deliberate choice to emit abbreviated
* images. Therefore the documentation and examples should encourage people
* to pass write_all_tables=TRUE; then it will take active thought to do the
* wrong thing.
*/
GLOBAL(void)
jpeg_start_compress (j_compress_ptr cinfo, boolean write_all_tables)
{
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
if (write_all_tables)
jpeg_suppress_tables(cinfo, FALSE); /* mark all tables to be written */
/* (Re)initialize error mgr and destination modules */
(*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
(*cinfo->dest->init_destination) (cinfo);
/* Perform master selection of active modules */
jinit_compress_master(cinfo);
/* Set up for the first pass */
(*cinfo->master->prepare_for_pass) (cinfo);
/* Ready for application to drive first pass through jpeg_write_scanlines
* or jpeg_write_raw_data.
*/
cinfo->next_scanline = 0;
cinfo->global_state = (cinfo->raw_data_in ? CSTATE_RAW_OK : CSTATE_SCANNING);
}
/*
* Write some scanlines of data to the JPEG compressor.
*
* The return value will be the number of lines actually written.
* This should be less than the supplied num_lines only in case that
* the data destination module has requested suspension of the compressor,
* or if more than image_height scanlines are passed in.
*
* Note: we warn about excess calls to jpeg_write_scanlines() since
* this likely signals an application programmer error. However,
* excess scanlines passed in the last valid call are *silently* ignored,
* so that the application need not adjust num_lines for end-of-image
* when using a multiple-scanline buffer.
*/
GLOBAL(JDIMENSION)
jpeg_write_scanlines (j_compress_ptr cinfo, JSAMPARRAY scanlines,
JDIMENSION num_lines)
{
JDIMENSION row_ctr, rows_left;
if (cinfo->global_state != CSTATE_SCANNING)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
if (cinfo->next_scanline >= cinfo->image_height)
WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
/* Call progress monitor hook if present */
if (cinfo->progress != NULL) {
cinfo->progress->pass_counter = (long) cinfo->next_scanline;
cinfo->progress->pass_limit = (long) cinfo->image_height;
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
}
/* Give master control module another chance if this is first call to
* jpeg_write_scanlines. This lets output of the frame/scan headers be
* delayed so that application can write COM, etc, markers between
* jpeg_start_compress and jpeg_write_scanlines.
*/
if (cinfo->master->call_pass_startup)
(*cinfo->master->pass_startup) (cinfo);
/* Ignore any extra scanlines at bottom of image. */
rows_left = cinfo->image_height - cinfo->next_scanline;
if (num_lines > rows_left)
num_lines = rows_left;
row_ctr = 0;
(*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, num_lines);
cinfo->next_scanline += row_ctr;
return row_ctr;
}
/*
* Alternate entry point to write raw data.
* Processes exactly one iMCU row per call, unless suspended.
*/
GLOBAL(JDIMENSION)
jpeg_write_raw_data (j_compress_ptr cinfo, JSAMPIMAGE data,
JDIMENSION num_lines)
{
JDIMENSION lines_per_iMCU_row;
if (cinfo->global_state != CSTATE_RAW_OK)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
if (cinfo->next_scanline >= cinfo->image_height) {
WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
return 0;
}
/* Call progress monitor hook if present */
if (cinfo->progress != NULL) {
cinfo->progress->pass_counter = (long) cinfo->next_scanline;
cinfo->progress->pass_limit = (long) cinfo->image_height;
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
}
/* Give master control module another chance if this is first call to
* jpeg_write_raw_data. This lets output of the frame/scan headers be
* delayed so that application can write COM, etc, markers between
* jpeg_start_compress and jpeg_write_raw_data.
*/
if (cinfo->master->call_pass_startup)
(*cinfo->master->pass_startup) (cinfo);
/* Verify that at least one iMCU row has been passed. */
lines_per_iMCU_row = cinfo->max_v_samp_factor * DCTSIZE;
if (num_lines < lines_per_iMCU_row)
ERREXIT(cinfo, JERR_BUFFER_SIZE);
/* Directly compress the row. */
if (! (*cinfo->coef->compress_data) (cinfo, data)) {
/* If compressor did not consume the whole row, suspend processing. */
return 0;
}
/* OK, we processed one iMCU row. */
cinfo->next_scanline += lines_per_iMCU_row;
return lines_per_iMCU_row;
}

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src/3rdparty/src/jpeg-6b/jccoefct.c vendored
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@ -1,449 +0,0 @@
/*
* jccoefct.c
*
* Copyright (C) 1994-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains the coefficient buffer controller for compression.
* This controller is the top level of the JPEG compressor proper.
* The coefficient buffer lies between forward-DCT and entropy encoding steps.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/* We use a full-image coefficient buffer when doing Huffman optimization,
* and also for writing multiple-scan JPEG files. In all cases, the DCT
* step is run during the first pass, and subsequent passes need only read
* the buffered coefficients.
*/
#ifdef ENTROPY_OPT_SUPPORTED
#define FULL_COEF_BUFFER_SUPPORTED
#else
#ifdef C_MULTISCAN_FILES_SUPPORTED
#define FULL_COEF_BUFFER_SUPPORTED
#endif
#endif
/* Private buffer controller object */
typedef struct {
struct jpeg_c_coef_controller pub; /* public fields */
JDIMENSION iMCU_row_num; /* iMCU row # within image */
JDIMENSION mcu_ctr; /* counts MCUs processed in current row */
int MCU_vert_offset; /* counts MCU rows within iMCU row */
int MCU_rows_per_iMCU_row; /* number of such rows needed */
/* For single-pass compression, it's sufficient to buffer just one MCU
* (although this may prove a bit slow in practice). We allocate a
* workspace of C_MAX_BLOCKS_IN_MCU coefficient blocks, and reuse it for each
* MCU constructed and sent. (On 80x86, the workspace is FAR even though
* it's not really very big; this is to keep the module interfaces unchanged
* when a large coefficient buffer is necessary.)
* In multi-pass modes, this array points to the current MCU's blocks
* within the virtual arrays.
*/
JBLOCKROW MCU_buffer[C_MAX_BLOCKS_IN_MCU];
/* In multi-pass modes, we need a virtual block array for each component. */
jvirt_barray_ptr whole_image[MAX_COMPONENTS];
} my_coef_controller;
typedef my_coef_controller * my_coef_ptr;
/* Forward declarations */
METHODDEF(boolean) compress_data
JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
#ifdef FULL_COEF_BUFFER_SUPPORTED
METHODDEF(boolean) compress_first_pass
JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
METHODDEF(boolean) compress_output
JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
#endif
LOCAL(void)
start_iMCU_row (j_compress_ptr cinfo)
/* Reset within-iMCU-row counters for a new row */
{
my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
/* In an interleaved scan, an MCU row is the same as an iMCU row.
* In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
* But at the bottom of the image, process only what's left.
*/
if (cinfo->comps_in_scan > 1) {
coef->MCU_rows_per_iMCU_row = 1;
} else {
if (coef->iMCU_row_num < (cinfo->total_iMCU_rows-1))
coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
else
coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
}
coef->mcu_ctr = 0;
coef->MCU_vert_offset = 0;
}
/*
* Initialize for a processing pass.
*/
METHODDEF(void)
start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
{
my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
coef->iMCU_row_num = 0;
start_iMCU_row(cinfo);
switch (pass_mode) {
case JBUF_PASS_THRU:
if (coef->whole_image[0] != NULL)
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
coef->pub.compress_data = compress_data;
break;
#ifdef FULL_COEF_BUFFER_SUPPORTED
case JBUF_SAVE_AND_PASS:
if (coef->whole_image[0] == NULL)
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
coef->pub.compress_data = compress_first_pass;
break;
case JBUF_CRANK_DEST:
if (coef->whole_image[0] == NULL)
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
coef->pub.compress_data = compress_output;
break;
#endif
default:
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
break;
}
}
/*
* Process some data in the single-pass case.
* We process the equivalent of one fully interleaved MCU row ("iMCU" row)
* per call, ie, v_samp_factor block rows for each component in the image.
* Returns TRUE if the iMCU row is completed, FALSE if suspended.
*
* NB: input_buf contains a plane for each component in image,
* which we index according to the component's SOF position.
*/
METHODDEF(boolean)
compress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
{
my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
JDIMENSION MCU_col_num; /* index of current MCU within row */
JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1;
JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
int blkn, bi, ci, yindex, yoffset, blockcnt;
JDIMENSION ypos, xpos;
jpeg_component_info *compptr;
/* Loop to write as much as one whole iMCU row */
for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
yoffset++) {
for (MCU_col_num = coef->mcu_ctr; MCU_col_num <= last_MCU_col;
MCU_col_num++) {
/* Determine where data comes from in input_buf and do the DCT thing.
* Each call on forward_DCT processes a horizontal row of DCT blocks
* as wide as an MCU; we rely on having allocated the MCU_buffer[] blocks
* sequentially. Dummy blocks at the right or bottom edge are filled in
* specially. The data in them does not matter for image reconstruction,
* so we fill them with values that will encode to the smallest amount of
* data, viz: all zeroes in the AC entries, DC entries equal to previous
* block's DC value. (Thanks to Thomas Kinsman for this idea.)
*/
blkn = 0;
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
blockcnt = (MCU_col_num < last_MCU_col) ? compptr->MCU_width
: compptr->last_col_width;
xpos = MCU_col_num * compptr->MCU_sample_width;
ypos = yoffset * DCTSIZE; /* ypos == (yoffset+yindex) * DCTSIZE */
for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
if (coef->iMCU_row_num < last_iMCU_row ||
yoffset+yindex < compptr->last_row_height) {
(*cinfo->fdct->forward_DCT) (cinfo, compptr,
input_buf[compptr->component_index],
coef->MCU_buffer[blkn],
ypos, xpos, (JDIMENSION) blockcnt);
if (blockcnt < compptr->MCU_width) {
/* Create some dummy blocks at the right edge of the image. */
jzero_far((void FAR *) coef->MCU_buffer[blkn + blockcnt],
(compptr->MCU_width - blockcnt) * SIZEOF(JBLOCK));
for (bi = blockcnt; bi < compptr->MCU_width; bi++) {
coef->MCU_buffer[blkn+bi][0][0] = coef->MCU_buffer[blkn+bi-1][0][0];
}
}
} else {
/* Create a row of dummy blocks at the bottom of the image. */
jzero_far((void FAR *) coef->MCU_buffer[blkn],
compptr->MCU_width * SIZEOF(JBLOCK));
for (bi = 0; bi < compptr->MCU_width; bi++) {
coef->MCU_buffer[blkn+bi][0][0] = coef->MCU_buffer[blkn-1][0][0];
}
}
blkn += compptr->MCU_width;
ypos += DCTSIZE;
}
}
/* Try to write the MCU. In event of a suspension failure, we will
* re-DCT the MCU on restart (a bit inefficient, could be fixed...)
*/
if (! (*cinfo->entropy->encode_mcu) (cinfo, coef->MCU_buffer)) {
/* Suspension forced; update state counters and exit */
coef->MCU_vert_offset = yoffset;
coef->mcu_ctr = MCU_col_num;
return FALSE;
}
}
/* Completed an MCU row, but perhaps not an iMCU row */
coef->mcu_ctr = 0;
}
/* Completed the iMCU row, advance counters for next one */
coef->iMCU_row_num++;
start_iMCU_row(cinfo);
return TRUE;
}
#ifdef FULL_COEF_BUFFER_SUPPORTED
/*
* Process some data in the first pass of a multi-pass case.
* We process the equivalent of one fully interleaved MCU row ("iMCU" row)
* per call, ie, v_samp_factor block rows for each component in the image.
* This amount of data is read from the source buffer, DCT'd and quantized,
* and saved into the virtual arrays. We also generate suitable dummy blocks
* as needed at the right and lower edges. (The dummy blocks are constructed
* in the virtual arrays, which have been padded appropriately.) This makes
* it possible for subsequent passes not to worry about real vs. dummy blocks.
*
* We must also emit the data to the entropy encoder. This is conveniently
* done by calling compress_output() after we've loaded the current strip
* of the virtual arrays.
*
* NB: input_buf contains a plane for each component in image. All
* components are DCT'd and loaded into the virtual arrays in this pass.
* However, it may be that only a subset of the components are emitted to
* the entropy encoder during this first pass; be careful about looking
* at the scan-dependent variables (MCU dimensions, etc).
*/
METHODDEF(boolean)
compress_first_pass (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
{
my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
JDIMENSION blocks_across, MCUs_across, MCUindex;
int bi, ci, h_samp_factor, block_row, block_rows, ndummy;
JCOEF lastDC;
jpeg_component_info *compptr;
JBLOCKARRAY buffer;
JBLOCKROW thisblockrow, lastblockrow;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
/* Align the virtual buffer for this component. */
buffer = (*cinfo->mem->access_virt_barray)
((j_common_ptr) cinfo, coef->whole_image[ci],
coef->iMCU_row_num * compptr->v_samp_factor,
(JDIMENSION) compptr->v_samp_factor, TRUE);
/* Count non-dummy DCT block rows in this iMCU row. */
if (coef->iMCU_row_num < last_iMCU_row)
block_rows = compptr->v_samp_factor;
else {
/* NB: can't use last_row_height here, since may not be set! */
block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
if (block_rows == 0) block_rows = compptr->v_samp_factor;
}
blocks_across = compptr->width_in_blocks;
h_samp_factor = compptr->h_samp_factor;
/* Count number of dummy blocks to be added at the right margin. */
ndummy = (int) (blocks_across % h_samp_factor);
if (ndummy > 0)
ndummy = h_samp_factor - ndummy;
/* Perform DCT for all non-dummy blocks in this iMCU row. Each call
* on forward_DCT processes a complete horizontal row of DCT blocks.
*/
for (block_row = 0; block_row < block_rows; block_row++) {
thisblockrow = buffer[block_row];
(*cinfo->fdct->forward_DCT) (cinfo, compptr,
input_buf[ci], thisblockrow,
(JDIMENSION) (block_row * DCTSIZE),
(JDIMENSION) 0, blocks_across);
if (ndummy > 0) {
/* Create dummy blocks at the right edge of the image. */
thisblockrow += blocks_across; /* => first dummy block */
jzero_far((void FAR *) thisblockrow, ndummy * SIZEOF(JBLOCK));
lastDC = thisblockrow[-1][0];
for (bi = 0; bi < ndummy; bi++) {
thisblockrow[bi][0] = lastDC;
}
}
}
/* If at end of image, create dummy block rows as needed.
* The tricky part here is that within each MCU, we want the DC values
* of the dummy blocks to match the last real block's DC value.
* This squeezes a few more bytes out of the resulting file...
*/
if (coef->iMCU_row_num == last_iMCU_row) {
blocks_across += ndummy; /* include lower right corner */
MCUs_across = blocks_across / h_samp_factor;
for (block_row = block_rows; block_row < compptr->v_samp_factor;
block_row++) {
thisblockrow = buffer[block_row];
lastblockrow = buffer[block_row-1];
jzero_far((void FAR *) thisblockrow,
(size_t) (blocks_across * SIZEOF(JBLOCK)));
for (MCUindex = 0; MCUindex < MCUs_across; MCUindex++) {
lastDC = lastblockrow[h_samp_factor-1][0];
for (bi = 0; bi < h_samp_factor; bi++) {
thisblockrow[bi][0] = lastDC;
}
thisblockrow += h_samp_factor; /* advance to next MCU in row */
lastblockrow += h_samp_factor;
}
}
}
}
/* NB: compress_output will increment iMCU_row_num if successful.
* A suspension return will result in redoing all the work above next time.
*/
/* Emit data to the entropy encoder, sharing code with subsequent passes */
return compress_output(cinfo, input_buf);
}
/*
* Process some data in subsequent passes of a multi-pass case.
* We process the equivalent of one fully interleaved MCU row ("iMCU" row)
* per call, ie, v_samp_factor block rows for each component in the scan.
* The data is obtained from the virtual arrays and fed to the entropy coder.
* Returns TRUE if the iMCU row is completed, FALSE if suspended.
*
* NB: input_buf is ignored; it is likely to be a NULL pointer.
*/
METHODDEF(boolean)
compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
{
my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
JDIMENSION MCU_col_num; /* index of current MCU within row */
int blkn, ci, xindex, yindex, yoffset;
JDIMENSION start_col;
JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN];
JBLOCKROW buffer_ptr;
jpeg_component_info *compptr;
/* Align the virtual buffers for the components used in this scan.
* NB: during first pass, this is safe only because the buffers will
* already be aligned properly, so jmemmgr.c won't need to do any I/O.
*/
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
buffer[ci] = (*cinfo->mem->access_virt_barray)
((j_common_ptr) cinfo, coef->whole_image[compptr->component_index],
coef->iMCU_row_num * compptr->v_samp_factor,
(JDIMENSION) compptr->v_samp_factor, FALSE);
}
/* Loop to process one whole iMCU row */
for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
yoffset++) {
for (MCU_col_num = coef->mcu_ctr; MCU_col_num < cinfo->MCUs_per_row;
MCU_col_num++) {
/* Construct list of pointers to DCT blocks belonging to this MCU */
blkn = 0; /* index of current DCT block within MCU */
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
start_col = MCU_col_num * compptr->MCU_width;
for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
buffer_ptr = buffer[ci][yindex+yoffset] + start_col;
for (xindex = 0; xindex < compptr->MCU_width; xindex++) {
coef->MCU_buffer[blkn++] = buffer_ptr++;
}
}
}
/* Try to write the MCU. */
if (! (*cinfo->entropy->encode_mcu) (cinfo, coef->MCU_buffer)) {
/* Suspension forced; update state counters and exit */
coef->MCU_vert_offset = yoffset;
coef->mcu_ctr = MCU_col_num;
return FALSE;
}
}
/* Completed an MCU row, but perhaps not an iMCU row */
coef->mcu_ctr = 0;
}
/* Completed the iMCU row, advance counters for next one */
coef->iMCU_row_num++;
start_iMCU_row(cinfo);
return TRUE;
}
#endif /* FULL_COEF_BUFFER_SUPPORTED */
/*
* Initialize coefficient buffer controller.
*/
GLOBAL(void)
jinit_c_coef_controller (j_compress_ptr cinfo, boolean need_full_buffer)
{
my_coef_ptr coef;
coef = (my_coef_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_coef_controller));
cinfo->coef = (struct jpeg_c_coef_controller *) coef;
coef->pub.start_pass = start_pass_coef;
/* Create the coefficient buffer. */
if (need_full_buffer) {
#ifdef FULL_COEF_BUFFER_SUPPORTED
/* Allocate a full-image virtual array for each component, */
/* padded to a multiple of samp_factor DCT blocks in each direction. */
int ci;
jpeg_component_info *compptr;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
coef->whole_image[ci] = (*cinfo->mem->request_virt_barray)
((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
(JDIMENSION) jround_up((long) compptr->width_in_blocks,
(long) compptr->h_samp_factor),
(JDIMENSION) jround_up((long) compptr->height_in_blocks,
(long) compptr->v_samp_factor),
(JDIMENSION) compptr->v_samp_factor);
}
#else
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
#endif
} else {
/* We only need a single-MCU buffer. */
JBLOCKROW buffer;
int i;
buffer = (JBLOCKROW)
(*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
for (i = 0; i < C_MAX_BLOCKS_IN_MCU; i++) {
coef->MCU_buffer[i] = buffer + i;
}
coef->whole_image[0] = NULL; /* flag for no virtual arrays */
}
}

459
src/3rdparty/src/jpeg-6b/jccolor.c vendored
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@ -1,459 +0,0 @@
/*
* jccolor.c
*
* Copyright (C) 1991-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains input colorspace conversion routines.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/* Private subobject */
typedef struct {
struct jpeg_color_converter pub; /* public fields */
/* Private state for RGB->YCC conversion */
INT32 * rgb_ycc_tab; /* => table for RGB to YCbCr conversion */
} my_color_converter;
typedef my_color_converter * my_cconvert_ptr;
/**************** RGB -> YCbCr conversion: most common case **************/
/*
* YCbCr is defined per CCIR 601-1, except that Cb and Cr are
* normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5.
* The conversion equations to be implemented are therefore
* Y = 0.29900 * R + 0.58700 * G + 0.11400 * B
* Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + CENTERJSAMPLE
* Cr = 0.50000 * R - 0.41869 * G - 0.08131 * B + CENTERJSAMPLE
* (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.)
* Note: older versions of the IJG code used a zero offset of MAXJSAMPLE/2,
* rather than CENTERJSAMPLE, for Cb and Cr. This gave equal positive and
* negative swings for Cb/Cr, but meant that grayscale values (Cb=Cr=0)
* were not represented exactly. Now we sacrifice exact representation of
* maximum red and maximum blue in order to get exact grayscales.
*
* To avoid floating-point arithmetic, we represent the fractional constants
* as integers scaled up by 2^16 (about 4 digits precision); we have to divide
* the products by 2^16, with appropriate rounding, to get the correct answer.
*
* For even more speed, we avoid doing any multiplications in the inner loop
* by precalculating the constants times R,G,B for all possible values.
* For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table);
* for 12-bit samples it is still acceptable. It's not very reasonable for
* 16-bit samples, but if you want lossless storage you shouldn't be changing
* colorspace anyway.
* The CENTERJSAMPLE offsets and the rounding fudge-factor of 0.5 are included
* in the tables to save adding them separately in the inner loop.
*/
#define SCALEBITS 16 /* speediest right-shift on some machines */
#define CBCR_OFFSET ((INT32) CENTERJSAMPLE << SCALEBITS)
#define ONE_HALF ((INT32) 1 << (SCALEBITS-1))
#define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
/* We allocate one big table and divide it up into eight parts, instead of
* doing eight alloc_small requests. This lets us use a single table base
* address, which can be held in a register in the inner loops on many
* machines (more than can hold all eight addresses, anyway).
*/
#define R_Y_OFF 0 /* offset to R => Y section */
#define G_Y_OFF (1*(MAXJSAMPLE+1)) /* offset to G => Y section */
#define B_Y_OFF (2*(MAXJSAMPLE+1)) /* etc. */
#define R_CB_OFF (3*(MAXJSAMPLE+1))
#define G_CB_OFF (4*(MAXJSAMPLE+1))
#define B_CB_OFF (5*(MAXJSAMPLE+1))
#define R_CR_OFF B_CB_OFF /* B=>Cb, R=>Cr are the same */
#define G_CR_OFF (6*(MAXJSAMPLE+1))
#define B_CR_OFF (7*(MAXJSAMPLE+1))
#define TABLE_SIZE (8*(MAXJSAMPLE+1))
/*
* Initialize for RGB->YCC colorspace conversion.
*/
METHODDEF(void)
rgb_ycc_start (j_compress_ptr cinfo)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
INT32 * rgb_ycc_tab;
INT32 i;
/* Allocate and fill in the conversion tables. */
cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(TABLE_SIZE * SIZEOF(INT32)));
for (i = 0; i <= MAXJSAMPLE; i++) {
rgb_ycc_tab[i+R_Y_OFF] = FIX(0.29900) * i;
rgb_ycc_tab[i+G_Y_OFF] = FIX(0.58700) * i;
rgb_ycc_tab[i+B_Y_OFF] = FIX(0.11400) * i + ONE_HALF;
rgb_ycc_tab[i+R_CB_OFF] = (-FIX(0.16874)) * i;
rgb_ycc_tab[i+G_CB_OFF] = (-FIX(0.33126)) * i;
/* We use a rounding fudge-factor of 0.5-epsilon for Cb and Cr.
* This ensures that the maximum output will round to MAXJSAMPLE
* not MAXJSAMPLE+1, and thus that we don't have to range-limit.
*/
rgb_ycc_tab[i+B_CB_OFF] = FIX(0.50000) * i + CBCR_OFFSET + ONE_HALF-1;
/* B=>Cb and R=>Cr tables are the same
rgb_ycc_tab[i+R_CR_OFF] = FIX(0.50000) * i + CBCR_OFFSET + ONE_HALF-1;
*/
rgb_ycc_tab[i+G_CR_OFF] = (-FIX(0.41869)) * i;
rgb_ycc_tab[i+B_CR_OFF] = (-FIX(0.08131)) * i;
}
}
/*
* Convert some rows of samples to the JPEG colorspace.
*
* Note that we change from the application's interleaved-pixel format
* to our internal noninterleaved, one-plane-per-component format.
* The input buffer is therefore three times as wide as the output buffer.
*
* A starting row offset is provided only for the output buffer. The caller
* can easily adjust the passed input_buf value to accommodate any row
* offset required on that side.
*/
METHODDEF(void)
rgb_ycc_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register int r, g, b;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr0, outptr1, outptr2;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->image_width;
while (--num_rows >= 0) {
inptr = *input_buf++;
outptr0 = output_buf[0][output_row];
outptr1 = output_buf[1][output_row];
outptr2 = output_buf[2][output_row];
output_row++;
for (col = 0; col < num_cols; col++) {
r = GETJSAMPLE(inptr[RGB_RED]);
g = GETJSAMPLE(inptr[RGB_GREEN]);
b = GETJSAMPLE(inptr[RGB_BLUE]);
inptr += RGB_PIXELSIZE;
/* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
* must be too; we do not need an explicit range-limiting operation.
* Hence the value being shifted is never negative, and we don't
* need the general RIGHT_SHIFT macro.
*/
/* Y */
outptr0[col] = (JSAMPLE)
((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
>> SCALEBITS);
/* Cb */
outptr1[col] = (JSAMPLE)
((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF])
>> SCALEBITS);
/* Cr */
outptr2[col] = (JSAMPLE)
((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF])
>> SCALEBITS);
}
}
}
/**************** Cases other than RGB -> YCbCr **************/
/*
* Convert some rows of samples to the JPEG colorspace.
* This version handles RGB->grayscale conversion, which is the same
* as the RGB->Y portion of RGB->YCbCr.
* We assume rgb_ycc_start has been called (we only use the Y tables).
*/
METHODDEF(void)
rgb_gray_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register int r, g, b;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->image_width;
while (--num_rows >= 0) {
inptr = *input_buf++;
outptr = output_buf[0][output_row];
output_row++;
for (col = 0; col < num_cols; col++) {
r = GETJSAMPLE(inptr[RGB_RED]);
g = GETJSAMPLE(inptr[RGB_GREEN]);
b = GETJSAMPLE(inptr[RGB_BLUE]);
inptr += RGB_PIXELSIZE;
/* Y */
outptr[col] = (JSAMPLE)
((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
>> SCALEBITS);
}
}
}
/*
* Convert some rows of samples to the JPEG colorspace.
* This version handles Adobe-style CMYK->YCCK conversion,
* where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the same
* conversion as above, while passing K (black) unchanged.
* We assume rgb_ycc_start has been called.
*/
METHODDEF(void)
cmyk_ycck_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register int r, g, b;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr0, outptr1, outptr2, outptr3;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->image_width;
while (--num_rows >= 0) {
inptr = *input_buf++;
outptr0 = output_buf[0][output_row];
outptr1 = output_buf[1][output_row];
outptr2 = output_buf[2][output_row];
outptr3 = output_buf[3][output_row];
output_row++;
for (col = 0; col < num_cols; col++) {
r = MAXJSAMPLE - GETJSAMPLE(inptr[0]);
g = MAXJSAMPLE - GETJSAMPLE(inptr[1]);
b = MAXJSAMPLE - GETJSAMPLE(inptr[2]);
/* K passes through as-is */
outptr3[col] = inptr[3]; /* don't need GETJSAMPLE here */
inptr += 4;
/* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
* must be too; we do not need an explicit range-limiting operation.
* Hence the value being shifted is never negative, and we don't
* need the general RIGHT_SHIFT macro.
*/
/* Y */
outptr0[col] = (JSAMPLE)
((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
>> SCALEBITS);
/* Cb */
outptr1[col] = (JSAMPLE)
((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF])
>> SCALEBITS);
/* Cr */
outptr2[col] = (JSAMPLE)
((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF])
>> SCALEBITS);
}
}
}
/*
* Convert some rows of samples to the JPEG colorspace.
* This version handles grayscale output with no conversion.
* The source can be either plain grayscale or YCbCr (since Y == gray).
*/
METHODDEF(void)
grayscale_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
register JSAMPROW inptr;
register JSAMPROW outptr;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->image_width;
int instride = cinfo->input_components;
while (--num_rows >= 0) {
inptr = *input_buf++;
outptr = output_buf[0][output_row];
output_row++;
for (col = 0; col < num_cols; col++) {
outptr[col] = inptr[0]; /* don't need GETJSAMPLE() here */
inptr += instride;
}
}
}
/*
* Convert some rows of samples to the JPEG colorspace.
* This version handles multi-component colorspaces without conversion.
* We assume input_components == num_components.
*/
METHODDEF(void)
null_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
register JSAMPROW inptr;
register JSAMPROW outptr;
register JDIMENSION col;
register int ci;
int nc = cinfo->num_components;
JDIMENSION num_cols = cinfo->image_width;
while (--num_rows >= 0) {
/* It seems fastest to make a separate pass for each component. */
for (ci = 0; ci < nc; ci++) {
inptr = *input_buf;
outptr = output_buf[ci][output_row];
for (col = 0; col < num_cols; col++) {
outptr[col] = inptr[ci]; /* don't need GETJSAMPLE() here */
inptr += nc;
}
}
input_buf++;
output_row++;
}
}
/*
* Empty method for start_pass.
*/
METHODDEF(void)
null_method (j_compress_ptr cinfo)
{
/* no work needed */
}
/*
* Module initialization routine for input colorspace conversion.
*/
GLOBAL(void)
jinit_color_converter (j_compress_ptr cinfo)
{
my_cconvert_ptr cconvert;
cconvert = (my_cconvert_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_color_converter));
cinfo->cconvert = (struct jpeg_color_converter *) cconvert;
/* set start_pass to null method until we find out differently */
cconvert->pub.start_pass = null_method;
/* Make sure input_components agrees with in_color_space */
switch (cinfo->in_color_space) {
case JCS_GRAYSCALE:
if (cinfo->input_components != 1)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
break;
case JCS_RGB:
#if RGB_PIXELSIZE != 3
if (cinfo->input_components != RGB_PIXELSIZE)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
break;
#endif /* else share code with YCbCr */
case JCS_YCbCr:
if (cinfo->input_components != 3)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
break;
case JCS_CMYK:
case JCS_YCCK:
if (cinfo->input_components != 4)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
break;
default: /* JCS_UNKNOWN can be anything */
if (cinfo->input_components < 1)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
break;
}
/* Check num_components, set conversion method based on requested space */
switch (cinfo->jpeg_color_space) {
case JCS_GRAYSCALE:
if (cinfo->num_components != 1)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
if (cinfo->in_color_space == JCS_GRAYSCALE)
cconvert->pub.color_convert = grayscale_convert;
else if (cinfo->in_color_space == JCS_RGB) {
cconvert->pub.start_pass = rgb_ycc_start;
cconvert->pub.color_convert = rgb_gray_convert;
} else if (cinfo->in_color_space == JCS_YCbCr)
cconvert->pub.color_convert = grayscale_convert;
else
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
case JCS_RGB:
if (cinfo->num_components != 3)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
if (cinfo->in_color_space == JCS_RGB && RGB_PIXELSIZE == 3)
cconvert->pub.color_convert = null_convert;
else
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
case JCS_YCbCr:
if (cinfo->num_components != 3)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
if (cinfo->in_color_space == JCS_RGB) {
cconvert->pub.start_pass = rgb_ycc_start;
cconvert->pub.color_convert = rgb_ycc_convert;
} else if (cinfo->in_color_space == JCS_YCbCr)
cconvert->pub.color_convert = null_convert;
else
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
case JCS_CMYK:
if (cinfo->num_components != 4)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
if (cinfo->in_color_space == JCS_CMYK)
cconvert->pub.color_convert = null_convert;
else
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
case JCS_YCCK:
if (cinfo->num_components != 4)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
if (cinfo->in_color_space == JCS_CMYK) {
cconvert->pub.start_pass = rgb_ycc_start;
cconvert->pub.color_convert = cmyk_ycck_convert;
} else if (cinfo->in_color_space == JCS_YCCK)
cconvert->pub.color_convert = null_convert;
else
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
default: /* allow null conversion of JCS_UNKNOWN */
if (cinfo->jpeg_color_space != cinfo->in_color_space ||
cinfo->num_components != cinfo->input_components)
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
cconvert->pub.color_convert = null_convert;
break;
}
}

387
src/3rdparty/src/jpeg-6b/jcdctmgr.c vendored
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@ -1,387 +0,0 @@
/*
* jcdctmgr.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains the forward-DCT management logic.
* This code selects a particular DCT implementation to be used,
* and it performs related housekeeping chores including coefficient
* quantization.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
#include "jdct.h" /* Private declarations for DCT subsystem */
/* Private subobject for this module */
typedef struct {
struct jpeg_forward_dct pub; /* public fields */
/* Pointer to the DCT routine actually in use */
forward_DCT_method_ptr do_dct;
/* The actual post-DCT divisors --- not identical to the quant table
* entries, because of scaling (especially for an unnormalized DCT).
* Each table is given in normal array order.
*/
DCTELEM * divisors[NUM_QUANT_TBLS];
#ifdef DCT_FLOAT_SUPPORTED
/* Same as above for the floating-point case. */
float_DCT_method_ptr do_float_dct;
FAST_FLOAT * float_divisors[NUM_QUANT_TBLS];
#endif
} my_fdct_controller;
typedef my_fdct_controller * my_fdct_ptr;
/*
* Initialize for a processing pass.
* Verify that all referenced Q-tables are present, and set up
* the divisor table for each one.
* In the current implementation, DCT of all components is done during
* the first pass, even if only some components will be output in the
* first scan. Hence all components should be examined here.
*/
METHODDEF(void)
start_pass_fdctmgr (j_compress_ptr cinfo)
{
my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
int ci, qtblno, i;
jpeg_component_info *compptr;
JQUANT_TBL * qtbl;
DCTELEM * dtbl;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
qtblno = compptr->quant_tbl_no;
/* Make sure specified quantization table is present */
if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS ||
cinfo->quant_tbl_ptrs[qtblno] == NULL)
ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno);
qtbl = cinfo->quant_tbl_ptrs[qtblno];
/* Compute divisors for this quant table */
/* We may do this more than once for same table, but it's not a big deal */
switch (cinfo->dct_method) {
#ifdef DCT_ISLOW_SUPPORTED
case JDCT_ISLOW:
/* For LL&M IDCT method, divisors are equal to raw quantization
* coefficients multiplied by 8 (to counteract scaling).
*/
if (fdct->divisors[qtblno] == NULL) {
fdct->divisors[qtblno] = (DCTELEM *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
DCTSIZE2 * SIZEOF(DCTELEM));
}
dtbl = fdct->divisors[qtblno];
for (i = 0; i < DCTSIZE2; i++) {
dtbl[i] = ((DCTELEM) qtbl->quantval[i]) << 3;
}
break;
#endif
#ifdef DCT_IFAST_SUPPORTED
case JDCT_IFAST:
{
/* For AA&N IDCT method, divisors are equal to quantization
* coefficients scaled by scalefactor[row]*scalefactor[col], where
* scalefactor[0] = 1
* scalefactor[k] = cos(k*PI/16) * sqrt(2) for k=1..7
* We apply a further scale factor of 8.
*/
#define CONST_BITS 14
static const INT16 aanscales[DCTSIZE2] = {
/* precomputed values scaled up by 14 bits */
16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
};
SHIFT_TEMPS
if (fdct->divisors[qtblno] == NULL) {
fdct->divisors[qtblno] = (DCTELEM *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
DCTSIZE2 * SIZEOF(DCTELEM));
}
dtbl = fdct->divisors[qtblno];
for (i = 0; i < DCTSIZE2; i++) {
dtbl[i] = (DCTELEM)
DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[i],
(INT32) aanscales[i]),
CONST_BITS-3);
}
}
break;
#endif
#ifdef DCT_FLOAT_SUPPORTED
case JDCT_FLOAT:
{
/* For float AA&N IDCT method, divisors are equal to quantization
* coefficients scaled by scalefactor[row]*scalefactor[col], where
* scalefactor[0] = 1
* scalefactor[k] = cos(k*PI/16) * sqrt(2) for k=1..7
* We apply a further scale factor of 8.
* What's actually stored is 1/divisor so that the inner loop can
* use a multiplication rather than a division.
*/
FAST_FLOAT * fdtbl;
int row, col;
static const double aanscalefactor[DCTSIZE] = {
1.0, 1.387039845, 1.306562965, 1.175875602,
1.0, 0.785694958, 0.541196100, 0.275899379
};
if (fdct->float_divisors[qtblno] == NULL) {
fdct->float_divisors[qtblno] = (FAST_FLOAT *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
DCTSIZE2 * SIZEOF(FAST_FLOAT));
}
fdtbl = fdct->float_divisors[qtblno];
i = 0;
for (row = 0; row < DCTSIZE; row++) {
for (col = 0; col < DCTSIZE; col++) {
fdtbl[i] = (FAST_FLOAT)
(1.0 / (((double) qtbl->quantval[i] *
aanscalefactor[row] * aanscalefactor[col] * 8.0)));
i++;
}
}
}
break;
#endif
default:
ERREXIT(cinfo, JERR_NOT_COMPILED);
break;
}
}
}
/*
* Perform forward DCT on one or more blocks of a component.
*
* The input samples are taken from the sample_data[] array starting at
* position start_row/start_col, and moving to the right for any additional
* blocks. The quantized coefficients are returned in coef_blocks[].
*/
METHODDEF(void)
forward_DCT (j_compress_ptr cinfo, jpeg_component_info * compptr,
JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
JDIMENSION start_row, JDIMENSION start_col,
JDIMENSION num_blocks)
/* This version is used for integer DCT implementations. */
{
/* This routine is heavily used, so it's worth coding it tightly. */
my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
forward_DCT_method_ptr do_dct = fdct->do_dct;
DCTELEM * divisors = fdct->divisors[compptr->quant_tbl_no];
DCTELEM workspace[DCTSIZE2]; /* work area for FDCT subroutine */
JDIMENSION bi;
sample_data += start_row; /* fold in the vertical offset once */
for (bi = 0; bi < num_blocks; bi++, start_col += DCTSIZE) {
/* Load data into workspace, applying unsigned->signed conversion */
{ register DCTELEM *workspaceptr;
register JSAMPROW elemptr;
register int elemr;
workspaceptr = workspace;
for (elemr = 0; elemr < DCTSIZE; elemr++) {
elemptr = sample_data[elemr] + start_col;
#if DCTSIZE == 8 /* unroll the inner loop */
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
#else
{ register int elemc;
for (elemc = DCTSIZE; elemc > 0; elemc--) {
*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
}
}
#endif
}
}
/* Perform the DCT */
(*do_dct) (workspace);
/* Quantize/descale the coefficients, and store into coef_blocks[] */
{ register DCTELEM temp, qval;
register int i;
register JCOEFPTR output_ptr = coef_blocks[bi];
for (i = 0; i < DCTSIZE2; i++) {
qval = divisors[i];
temp = workspace[i];
/* Divide the coefficient value by qval, ensuring proper rounding.
* Since C does not specify the direction of rounding for negative
* quotients, we have to force the dividend positive for portability.
*
* In most files, at least half of the output values will be zero
* (at default quantization settings, more like three-quarters...)
* so we should ensure that this case is fast. On many machines,
* a comparison is enough cheaper than a divide to make a special test
* a win. Since both inputs will be nonnegative, we need only test
* for a < b to discover whether a/b is 0.
* If your machine's division is fast enough, define FAST_DIVIDE.
*/
#ifdef FAST_DIVIDE
#define DIVIDE_BY(a,b) a /= b
#else
#define DIVIDE_BY(a,b) if (a >= b) a /= b; else a = 0
#endif
if (temp < 0) {
temp = -temp;
temp += qval>>1; /* for rounding */
DIVIDE_BY(temp, qval);
temp = -temp;
} else {
temp += qval>>1; /* for rounding */
DIVIDE_BY(temp, qval);
}
output_ptr[i] = (JCOEF) temp;
}
}
}
}
#ifdef DCT_FLOAT_SUPPORTED
METHODDEF(void)
forward_DCT_float (j_compress_ptr cinfo, jpeg_component_info * compptr,
JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
JDIMENSION start_row, JDIMENSION start_col,
JDIMENSION num_blocks)
/* This version is used for floating-point DCT implementations. */
{
/* This routine is heavily used, so it's worth coding it tightly. */
my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
float_DCT_method_ptr do_dct = fdct->do_float_dct;
FAST_FLOAT * divisors = fdct->float_divisors[compptr->quant_tbl_no];
FAST_FLOAT workspace[DCTSIZE2]; /* work area for FDCT subroutine */
JDIMENSION bi;
sample_data += start_row; /* fold in the vertical offset once */
for (bi = 0; bi < num_blocks; bi++, start_col += DCTSIZE) {
/* Load data into workspace, applying unsigned->signed conversion */
{ register FAST_FLOAT *workspaceptr;
register JSAMPROW elemptr;
register int elemr;
workspaceptr = workspace;
for (elemr = 0; elemr < DCTSIZE; elemr++) {
elemptr = sample_data[elemr] + start_col;
#if DCTSIZE == 8 /* unroll the inner loop */
*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
#else
{ register int elemc;
for (elemc = DCTSIZE; elemc > 0; elemc--) {
*workspaceptr++ = (FAST_FLOAT)
(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
}
}
#endif
}
}
/* Perform the DCT */
(*do_dct) (workspace);
/* Quantize/descale the coefficients, and store into coef_blocks[] */
{ register FAST_FLOAT temp;
register int i;
register JCOEFPTR output_ptr = coef_blocks[bi];
for (i = 0; i < DCTSIZE2; i++) {
/* Apply the quantization and scaling factor */
temp = workspace[i] * divisors[i];
/* Round to nearest integer.
* Since C does not specify the direction of rounding for negative
* quotients, we have to force the dividend positive for portability.
* The maximum coefficient size is +-16K (for 12-bit data), so this
* code should work for either 16-bit or 32-bit ints.
*/
output_ptr[i] = (JCOEF) ((int) (temp + (FAST_FLOAT) 16384.5) - 16384);
}
}
}
}
#endif /* DCT_FLOAT_SUPPORTED */
/*
* Initialize FDCT manager.
*/
GLOBAL(void)
jinit_forward_dct (j_compress_ptr cinfo)
{
my_fdct_ptr fdct;
int i;
fdct = (my_fdct_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_fdct_controller));
cinfo->fdct = (struct jpeg_forward_dct *) fdct;
fdct->pub.start_pass = start_pass_fdctmgr;
switch (cinfo->dct_method) {
#ifdef DCT_ISLOW_SUPPORTED
case JDCT_ISLOW:
fdct->pub.forward_DCT = forward_DCT;
fdct->do_dct = jpeg_fdct_islow;
break;
#endif
#ifdef DCT_IFAST_SUPPORTED
case JDCT_IFAST:
fdct->pub.forward_DCT = forward_DCT;
fdct->do_dct = jpeg_fdct_ifast;
break;
#endif
#ifdef DCT_FLOAT_SUPPORTED
case JDCT_FLOAT:
fdct->pub.forward_DCT = forward_DCT_float;
fdct->do_float_dct = jpeg_fdct_float;
break;
#endif
default:
ERREXIT(cinfo, JERR_NOT_COMPILED);
break;
}
/* Mark divisor tables unallocated */
for (i = 0; i < NUM_QUANT_TBLS; i++) {
fdct->divisors[i] = NULL;
#ifdef DCT_FLOAT_SUPPORTED
fdct->float_divisors[i] = NULL;
#endif
}
}

909
src/3rdparty/src/jpeg-6b/jchuff.c vendored
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@ -1,909 +0,0 @@
/*
* jchuff.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains Huffman entropy encoding routines.
*
* Much of the complexity here has to do with supporting output suspension.
* If the data destination module demands suspension, we want to be able to
* back up to the start of the current MCU. To do this, we copy state
* variables into local working storage, and update them back to the
* permanent JPEG objects only upon successful completion of an MCU.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
#include "jchuff.h" /* Declarations shared with jcphuff.c */
/* Expanded entropy encoder object for Huffman encoding.
*
* The savable_state subrecord contains fields that change within an MCU,
* but must not be updated permanently until we complete the MCU.
*/
typedef struct {
INT32 put_buffer; /* current bit-accumulation buffer */
int put_bits; /* # of bits now in it */
int last_dc_val[MAX_COMPS_IN_SCAN]; /* last DC coef for each component */
} savable_state;
/* This macro is to work around compilers with missing or broken
* structure assignment. You'll need to fix this code if you have
* such a compiler and you change MAX_COMPS_IN_SCAN.
*/
#ifndef NO_STRUCT_ASSIGN
#define ASSIGN_STATE(dest,src) ((dest) = (src))
#else
#if MAX_COMPS_IN_SCAN == 4
#define ASSIGN_STATE(dest,src) \
((dest).put_buffer = (src).put_buffer, \
(dest).put_bits = (src).put_bits, \
(dest).last_dc_val[0] = (src).last_dc_val[0], \
(dest).last_dc_val[1] = (src).last_dc_val[1], \
(dest).last_dc_val[2] = (src).last_dc_val[2], \
(dest).last_dc_val[3] = (src).last_dc_val[3])
#endif
#endif
typedef struct {
struct jpeg_entropy_encoder pub; /* public fields */
savable_state saved; /* Bit buffer & DC state at start of MCU */
/* These fields are NOT loaded into local working state. */
unsigned int restarts_to_go; /* MCUs left in this restart interval */
int next_restart_num; /* next restart number to write (0-7) */
/* Pointers to derived tables (these workspaces have image lifespan) */
c_derived_tbl * dc_derived_tbls[NUM_HUFF_TBLS];
c_derived_tbl * ac_derived_tbls[NUM_HUFF_TBLS];
#ifdef ENTROPY_OPT_SUPPORTED /* Statistics tables for optimization */
long * dc_count_ptrs[NUM_HUFF_TBLS];
long * ac_count_ptrs[NUM_HUFF_TBLS];
#endif
} huff_entropy_encoder;
typedef huff_entropy_encoder * huff_entropy_ptr;
/* Working state while writing an MCU.
* This struct contains all the fields that are needed by subroutines.
*/
typedef struct {
JOCTET * next_output_byte; /* => next byte to write in buffer */
size_t free_in_buffer; /* # of byte spaces remaining in buffer */
savable_state cur; /* Current bit buffer & DC state */
j_compress_ptr cinfo; /* dump_buffer needs access to this */
} working_state;
/* Forward declarations */
METHODDEF(boolean) encode_mcu_huff JPP((j_compress_ptr cinfo,
JBLOCKROW *MCU_data));
METHODDEF(void) finish_pass_huff JPP((j_compress_ptr cinfo));
#ifdef ENTROPY_OPT_SUPPORTED
METHODDEF(boolean) encode_mcu_gather JPP((j_compress_ptr cinfo,
JBLOCKROW *MCU_data));
METHODDEF(void) finish_pass_gather JPP((j_compress_ptr cinfo));
#endif
/*
* Initialize for a Huffman-compressed scan.
* If gather_statistics is TRUE, we do not output anything during the scan,
* just count the Huffman symbols used and generate Huffman code tables.
*/
METHODDEF(void)
start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
int ci, dctbl, actbl;
jpeg_component_info * compptr;
if (gather_statistics) {
#ifdef ENTROPY_OPT_SUPPORTED
entropy->pub.encode_mcu = encode_mcu_gather;
entropy->pub.finish_pass = finish_pass_gather;
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif
} else {
entropy->pub.encode_mcu = encode_mcu_huff;
entropy->pub.finish_pass = finish_pass_huff;
}
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
dctbl = compptr->dc_tbl_no;
actbl = compptr->ac_tbl_no;
if (gather_statistics) {
#ifdef ENTROPY_OPT_SUPPORTED
/* Check for invalid table indexes */
/* (make_c_derived_tbl does this in the other path) */
if (dctbl < 0 || dctbl >= NUM_HUFF_TBLS)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, dctbl);
if (actbl < 0 || actbl >= NUM_HUFF_TBLS)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, actbl);
/* Allocate and zero the statistics tables */
/* Note that jpeg_gen_optimal_table expects 257 entries in each table! */
if (entropy->dc_count_ptrs[dctbl] == NULL)
entropy->dc_count_ptrs[dctbl] = (long *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
257 * SIZEOF(long));
MEMZERO(entropy->dc_count_ptrs[dctbl], 257 * SIZEOF(long));
if (entropy->ac_count_ptrs[actbl] == NULL)
entropy->ac_count_ptrs[actbl] = (long *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
257 * SIZEOF(long));
MEMZERO(entropy->ac_count_ptrs[actbl], 257 * SIZEOF(long));
#endif
} else {
/* Compute derived values for Huffman tables */
/* We may do this more than once for a table, but it's not expensive */
jpeg_make_c_derived_tbl(cinfo, TRUE, dctbl,
& entropy->dc_derived_tbls[dctbl]);
jpeg_make_c_derived_tbl(cinfo, FALSE, actbl,
& entropy->ac_derived_tbls[actbl]);
}
/* Initialize DC predictions to 0 */
entropy->saved.last_dc_val[ci] = 0;
}
/* Initialize bit buffer to empty */
entropy->saved.put_buffer = 0;
entropy->saved.put_bits = 0;
/* Initialize restart stuff */
entropy->restarts_to_go = cinfo->restart_interval;
entropy->next_restart_num = 0;
}
/*
* Compute the derived values for a Huffman table.
* This routine also performs some validation checks on the table.
*
* Note this is also used by jcphuff.c.
*/
GLOBAL(void)
jpeg_make_c_derived_tbl (j_compress_ptr cinfo, boolean isDC, int tblno,
c_derived_tbl ** pdtbl)
{
JHUFF_TBL *htbl;
c_derived_tbl *dtbl;
int p, i, l, lastp, si, maxsymbol;
char huffsize[257];
unsigned int huffcode[257];
unsigned int code;
/* Note that huffsize[] and huffcode[] are filled in code-length order,
* paralleling the order of the symbols themselves in htbl->huffval[].
*/
/* Find the input Huffman table */
if (tblno < 0 || tblno >= NUM_HUFF_TBLS)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
htbl =
isDC ? cinfo->dc_huff_tbl_ptrs[tblno] : cinfo->ac_huff_tbl_ptrs[tblno];
if (htbl == NULL)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
/* Allocate a workspace if we haven't already done so. */
if (*pdtbl == NULL)
*pdtbl = (c_derived_tbl *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(c_derived_tbl));
dtbl = *pdtbl;
/* Figure C.1: make table of Huffman code length for each symbol */
p = 0;
for (l = 1; l <= 16; l++) {
i = (int) htbl->bits[l];
if (i < 0 || p + i > 256) /* protect against table overrun */
ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
while (i--)
huffsize[p++] = (char) l;
}
huffsize[p] = 0;
lastp = p;
/* Figure C.2: generate the codes themselves */
/* We also validate that the counts represent a legal Huffman code tree. */
code = 0;
si = huffsize[0];
p = 0;
while (huffsize[p]) {
while (((int) huffsize[p]) == si) {
huffcode[p++] = code;
code++;
}
/* code is now 1 more than the last code used for codelength si; but
* it must still fit in si bits, since no code is allowed to be all ones.
*/
if (((INT32) code) >= (((INT32) 1) << si))
ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
code <<= 1;
si++;
}
/* Figure C.3: generate encoding tables */
/* These are code and size indexed by symbol value */
/* Set all codeless symbols to have code length 0;
* this lets us detect duplicate VAL entries here, and later
* allows emit_bits to detect any attempt to emit such symbols.
*/
MEMZERO(dtbl->ehufsi, SIZEOF(dtbl->ehufsi));
/* This is also a convenient place to check for out-of-range
* and duplicated VAL entries. We allow 0..255 for AC symbols
* but only 0..15 for DC. (We could constrain them further
* based on data depth and mode, but this seems enough.)
*/
maxsymbol = isDC ? 15 : 255;
for (p = 0; p < lastp; p++) {
i = htbl->huffval[p];
if (i < 0 || i > maxsymbol || dtbl->ehufsi[i])
ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
dtbl->ehufco[i] = huffcode[p];
dtbl->ehufsi[i] = huffsize[p];
}
}
/* Outputting bytes to the file */
/* Emit a byte, taking 'action' if must suspend. */
#define emit_byte(state,val,action) \
{ *(state)->next_output_byte++ = (JOCTET) (val); \
if (--(state)->free_in_buffer == 0) \
if (! dump_buffer(state)) \
{ action; } }
LOCAL(boolean)
dump_buffer (working_state * state)
/* Empty the output buffer; return TRUE if successful, FALSE if must suspend */
{
struct jpeg_destination_mgr * dest = state->cinfo->dest;
if (! (*dest->empty_output_buffer) (state->cinfo))
return FALSE;
/* After a successful buffer dump, must reset buffer pointers */
state->next_output_byte = dest->next_output_byte;
state->free_in_buffer = dest->free_in_buffer;
return TRUE;
}
/* Outputting bits to the file */
/* Only the right 24 bits of put_buffer are used; the valid bits are
* left-justified in this part. At most 16 bits can be passed to emit_bits
* in one call, and we never retain more than 7 bits in put_buffer
* between calls, so 24 bits are sufficient.
*/
INLINE
LOCAL(boolean)
emit_bits (working_state * state, unsigned int code, int size)
/* Emit some bits; return TRUE if successful, FALSE if must suspend */
{
/* This routine is heavily used, so it's worth coding tightly. */
register INT32 put_buffer = (INT32) code;
register int put_bits = state->cur.put_bits;
/* if size is 0, caller used an invalid Huffman table entry */
if (size == 0)
ERREXIT(state->cinfo, JERR_HUFF_MISSING_CODE);
put_buffer &= (((INT32) 1)<<size) - 1; /* mask off any extra bits in code */
put_bits += size; /* new number of bits in buffer */
put_buffer <<= 24 - put_bits; /* align incoming bits */
put_buffer |= state->cur.put_buffer; /* and merge with old buffer contents */
while (put_bits >= 8) {
int c = (int) ((put_buffer >> 16) & 0xFF);
emit_byte(state, c, return FALSE);
if (c == 0xFF) { /* need to stuff a zero byte? */
emit_byte(state, 0, return FALSE);
}
put_buffer <<= 8;
put_bits -= 8;
}
state->cur.put_buffer = put_buffer; /* update state variables */
state->cur.put_bits = put_bits;
return TRUE;
}
LOCAL(boolean)
flush_bits (working_state * state)
{
if (! emit_bits(state, 0x7F, 7)) /* fill any partial byte with ones */
return FALSE;
state->cur.put_buffer = 0; /* and reset bit-buffer to empty */
state->cur.put_bits = 0;
return TRUE;
}
/* Encode a single block's worth of coefficients */
LOCAL(boolean)
encode_one_block (working_state * state, JCOEFPTR block, int last_dc_val,
c_derived_tbl *dctbl, c_derived_tbl *actbl)
{
register int temp, temp2;
register int nbits;
register int k, r, i;
/* Encode the DC coefficient difference per section F.1.2.1 */
temp = temp2 = block[0] - last_dc_val;
if (temp < 0) {
temp = -temp; /* temp is abs value of input */
/* For a negative input, want temp2 = bitwise complement of abs(input) */
/* This code assumes we are on a two's complement machine */
temp2--;
}
/* Find the number of bits needed for the magnitude of the coefficient */
nbits = 0;
while (temp) {
nbits++;
temp >>= 1;
}
/* Check for out-of-range coefficient values.
* Since we're encoding a difference, the range limit is twice as much.
*/
if (nbits > MAX_COEF_BITS+1)
ERREXIT(state->cinfo, JERR_BAD_DCT_COEF);
/* Emit the Huffman-coded symbol for the number of bits */
if (! emit_bits(state, dctbl->ehufco[nbits], dctbl->ehufsi[nbits]))
return FALSE;
/* Emit that number of bits of the value, if positive, */
/* or the complement of its magnitude, if negative. */
if (nbits) /* emit_bits rejects calls with size 0 */
if (! emit_bits(state, (unsigned int) temp2, nbits))
return FALSE;
/* Encode the AC coefficients per section F.1.2.2 */
r = 0; /* r = run length of zeros */
for (k = 1; k < DCTSIZE2; k++) {
if ((temp = block[jpeg_natural_order[k]]) == 0) {
r++;
} else {
/* if run length > 15, must emit special run-length-16 codes (0xF0) */
while (r > 15) {
if (! emit_bits(state, actbl->ehufco[0xF0], actbl->ehufsi[0xF0]))
return FALSE;
r -= 16;
}
temp2 = temp;
if (temp < 0) {
temp = -temp; /* temp is abs value of input */
/* This code assumes we are on a two's complement machine */
temp2--;
}
/* Find the number of bits needed for the magnitude of the coefficient */
nbits = 1; /* there must be at least one 1 bit */
while ((temp >>= 1))
nbits++;
/* Check for out-of-range coefficient values */
if (nbits > MAX_COEF_BITS)
ERREXIT(state->cinfo, JERR_BAD_DCT_COEF);
/* Emit Huffman symbol for run length / number of bits */
i = (r << 4) + nbits;
if (! emit_bits(state, actbl->ehufco[i], actbl->ehufsi[i]))
return FALSE;
/* Emit that number of bits of the value, if positive, */
/* or the complement of its magnitude, if negative. */
if (! emit_bits(state, (unsigned int) temp2, nbits))
return FALSE;
r = 0;
}
}
/* If the last coef(s) were zero, emit an end-of-block code */
if (r > 0)
if (! emit_bits(state, actbl->ehufco[0], actbl->ehufsi[0]))
return FALSE;
return TRUE;
}
/*
* Emit a restart marker & resynchronize predictions.
*/
LOCAL(boolean)
emit_restart (working_state * state, int restart_num)
{
int ci;
if (! flush_bits(state))
return FALSE;
emit_byte(state, 0xFF, return FALSE);
emit_byte(state, JPEG_RST0 + restart_num, return FALSE);
/* Re-initialize DC predictions to 0 */
for (ci = 0; ci < state->cinfo->comps_in_scan; ci++)
state->cur.last_dc_val[ci] = 0;
/* The restart counter is not updated until we successfully write the MCU. */
return TRUE;
}
/*
* Encode and output one MCU's worth of Huffman-compressed coefficients.
*/
METHODDEF(boolean)
encode_mcu_huff (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
working_state state;
int blkn, ci;
jpeg_component_info * compptr;
/* Load up working state */
state.next_output_byte = cinfo->dest->next_output_byte;
state.free_in_buffer = cinfo->dest->free_in_buffer;
ASSIGN_STATE(state.cur, entropy->saved);
state.cinfo = cinfo;
/* Emit restart marker if needed */
if (cinfo->restart_interval) {
if (entropy->restarts_to_go == 0)
if (! emit_restart(&state, entropy->next_restart_num))
return FALSE;
}
/* Encode the MCU data blocks */
for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
ci = cinfo->MCU_membership[blkn];
compptr = cinfo->cur_comp_info[ci];
if (! encode_one_block(&state,
MCU_data[blkn][0], state.cur.last_dc_val[ci],
entropy->dc_derived_tbls[compptr->dc_tbl_no],
entropy->ac_derived_tbls[compptr->ac_tbl_no]))
return FALSE;
/* Update last_dc_val */
state.cur.last_dc_val[ci] = MCU_data[blkn][0][0];
}
/* Completed MCU, so update state */
cinfo->dest->next_output_byte = state.next_output_byte;
cinfo->dest->free_in_buffer = state.free_in_buffer;
ASSIGN_STATE(entropy->saved, state.cur);
/* Update restart-interval state too */
if (cinfo->restart_interval) {
if (entropy->restarts_to_go == 0) {
entropy->restarts_to_go = cinfo->restart_interval;
entropy->next_restart_num++;
entropy->next_restart_num &= 7;
}
entropy->restarts_to_go--;
}
return TRUE;
}
/*
* Finish up at the end of a Huffman-compressed scan.
*/
METHODDEF(void)
finish_pass_huff (j_compress_ptr cinfo)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
working_state state;
/* Load up working state ... flush_bits needs it */
state.next_output_byte = cinfo->dest->next_output_byte;
state.free_in_buffer = cinfo->dest->free_in_buffer;
ASSIGN_STATE(state.cur, entropy->saved);
state.cinfo = cinfo;
/* Flush out the last data */
if (! flush_bits(&state))
ERREXIT(cinfo, JERR_CANT_SUSPEND);
/* Update state */
cinfo->dest->next_output_byte = state.next_output_byte;
cinfo->dest->free_in_buffer = state.free_in_buffer;
ASSIGN_STATE(entropy->saved, state.cur);
}
/*
* Huffman coding optimization.
*
* We first scan the supplied data and count the number of uses of each symbol
* that is to be Huffman-coded. (This process MUST agree with the code above.)
* Then we build a Huffman coding tree for the observed counts.
* Symbols which are not needed at all for the particular image are not
* assigned any code, which saves space in the DHT marker as well as in
* the compressed data.
*/
#ifdef ENTROPY_OPT_SUPPORTED
/* Process a single block's worth of coefficients */
LOCAL(void)
htest_one_block (j_compress_ptr cinfo, JCOEFPTR block, int last_dc_val,
long dc_counts[], long ac_counts[])
{
register int temp;
register int nbits;
register int k, r;
/* Encode the DC coefficient difference per section F.1.2.1 */
temp = block[0] - last_dc_val;
if (temp < 0)
temp = -temp;
/* Find the number of bits needed for the magnitude of the coefficient */
nbits = 0;
while (temp) {
nbits++;
temp >>= 1;
}
/* Check for out-of-range coefficient values.
* Since we're encoding a difference, the range limit is twice as much.
*/
if (nbits > MAX_COEF_BITS+1)
ERREXIT(cinfo, JERR_BAD_DCT_COEF);
/* Count the Huffman symbol for the number of bits */
dc_counts[nbits]++;
/* Encode the AC coefficients per section F.1.2.2 */
r = 0; /* r = run length of zeros */
for (k = 1; k < DCTSIZE2; k++) {
if ((temp = block[jpeg_natural_order[k]]) == 0) {
r++;
} else {
/* if run length > 15, must emit special run-length-16 codes (0xF0) */
while (r > 15) {
ac_counts[0xF0]++;
r -= 16;
}
/* Find the number of bits needed for the magnitude of the coefficient */
if (temp < 0)
temp = -temp;
/* Find the number of bits needed for the magnitude of the coefficient */
nbits = 1; /* there must be at least one 1 bit */
while ((temp >>= 1))
nbits++;
/* Check for out-of-range coefficient values */
if (nbits > MAX_COEF_BITS)
ERREXIT(cinfo, JERR_BAD_DCT_COEF);
/* Count Huffman symbol for run length / number of bits */
ac_counts[(r << 4) + nbits]++;
r = 0;
}
}
/* If the last coef(s) were zero, emit an end-of-block code */
if (r > 0)
ac_counts[0]++;
}
/*
* Trial-encode one MCU's worth of Huffman-compressed coefficients.
* No data is actually output, so no suspension return is possible.
*/
METHODDEF(boolean)
encode_mcu_gather (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
int blkn, ci;
jpeg_component_info * compptr;
/* Take care of restart intervals if needed */
if (cinfo->restart_interval) {
if (entropy->restarts_to_go == 0) {
/* Re-initialize DC predictions to 0 */
for (ci = 0; ci < cinfo->comps_in_scan; ci++)
entropy->saved.last_dc_val[ci] = 0;
/* Update restart state */
entropy->restarts_to_go = cinfo->restart_interval;
}
entropy->restarts_to_go--;
}
for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
ci = cinfo->MCU_membership[blkn];
compptr = cinfo->cur_comp_info[ci];
htest_one_block(cinfo, MCU_data[blkn][0], entropy->saved.last_dc_val[ci],
entropy->dc_count_ptrs[compptr->dc_tbl_no],
entropy->ac_count_ptrs[compptr->ac_tbl_no]);
entropy->saved.last_dc_val[ci] = MCU_data[blkn][0][0];
}
return TRUE;
}
/*
* Generate the best Huffman code table for the given counts, fill htbl.
* Note this is also used by jcphuff.c.
*
* The JPEG standard requires that no symbol be assigned a codeword of all
* one bits (so that padding bits added at the end of a compressed segment
* can't look like a valid code). Because of the canonical ordering of
* codewords, this just means that there must be an unused slot in the
* longest codeword length category. Section K.2 of the JPEG spec suggests
* reserving such a slot by pretending that symbol 256 is a valid symbol
* with count 1. In theory that's not optimal; giving it count zero but
* including it in the symbol set anyway should give a better Huffman code.
* But the theoretically better code actually seems to come out worse in
* practice, because it produces more all-ones bytes (which incur stuffed
* zero bytes in the final file). In any case the difference is tiny.
*
* The JPEG standard requires Huffman codes to be no more than 16 bits long.
* If some symbols have a very small but nonzero probability, the Huffman tree
* must be adjusted to meet the code length restriction. We currently use
* the adjustment method suggested in JPEG section K.2. This method is *not*
* optimal; it may not choose the best possible limited-length code. But
* typically only very-low-frequency symbols will be given less-than-optimal
* lengths, so the code is almost optimal. Experimental comparisons against
* an optimal limited-length-code algorithm indicate that the difference is
* microscopic --- usually less than a hundredth of a percent of total size.
* So the extra complexity of an optimal algorithm doesn't seem worthwhile.
*/
GLOBAL(void)
jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
{
#define MAX_CLEN 32 /* assumed maximum initial code length */
UINT8 bits[MAX_CLEN+1]; /* bits[k] = # of symbols with code length k */
int codesize[257]; /* codesize[k] = code length of symbol k */
int others[257]; /* next symbol in current branch of tree */
int c1, c2;
int p, i, j;
long v;
/* This algorithm is explained in section K.2 of the JPEG standard */
MEMZERO(bits, SIZEOF(bits));
MEMZERO(codesize, SIZEOF(codesize));
for (i = 0; i < 257; i++)
others[i] = -1; /* init links to empty */
freq[256] = 1; /* make sure 256 has a nonzero count */
/* Including the pseudo-symbol 256 in the Huffman procedure guarantees
* that no real symbol is given code-value of all ones, because 256
* will be placed last in the largest codeword category.
*/
/* Huffman's basic algorithm to assign optimal code lengths to symbols */
for (;;) {
/* Find the smallest nonzero frequency, set c1 = its symbol */
/* In case of ties, take the larger symbol number */
c1 = -1;
v = 1000000000L;
for (i = 0; i <= 256; i++) {
if (freq[i] && freq[i] <= v) {
v = freq[i];
c1 = i;
}
}
/* Find the next smallest nonzero frequency, set c2 = its symbol */
/* In case of ties, take the larger symbol number */
c2 = -1;
v = 1000000000L;
for (i = 0; i <= 256; i++) {
if (freq[i] && freq[i] <= v && i != c1) {
v = freq[i];
c2 = i;
}
}
/* Done if we've merged everything into one frequency */
if (c2 < 0)
break;
/* Else merge the two counts/trees */
freq[c1] += freq[c2];
freq[c2] = 0;
/* Increment the codesize of everything in c1's tree branch */
codesize[c1]++;
while (others[c1] >= 0) {
c1 = others[c1];
codesize[c1]++;
}
others[c1] = c2; /* chain c2 onto c1's tree branch */
/* Increment the codesize of everything in c2's tree branch */
codesize[c2]++;
while (others[c2] >= 0) {
c2 = others[c2];
codesize[c2]++;
}
}
/* Now count the number of symbols of each code length */
for (i = 0; i <= 256; i++) {
if (codesize[i]) {
/* The JPEG standard seems to think that this can't happen, */
/* but I'm paranoid... */
if (codesize[i] > MAX_CLEN)
ERREXIT(cinfo, JERR_HUFF_CLEN_OVERFLOW);
bits[codesize[i]]++;
}
}
/* JPEG doesn't allow symbols with code lengths over 16 bits, so if the pure
* Huffman procedure assigned any such lengths, we must adjust the coding.
* Here is what the JPEG spec says about how this next bit works:
* Since symbols are paired for the longest Huffman code, the symbols are
* removed from this length category two at a time. The prefix for the pair
* (which is one bit shorter) is allocated to one of the pair; then,
* skipping the BITS entry for that prefix length, a code word from the next
* shortest nonzero BITS entry is converted into a prefix for two code words
* one bit longer.
*/
for (i = MAX_CLEN; i > 16; i--) {
while (bits[i] > 0) {
j = i - 2; /* find length of new prefix to be used */
while (bits[j] == 0)
j--;
bits[i] -= 2; /* remove two symbols */
bits[i-1]++; /* one goes in this length */
bits[j+1] += 2; /* two new symbols in this length */
bits[j]--; /* symbol of this length is now a prefix */
}
}
/* Remove the count for the pseudo-symbol 256 from the largest codelength */
while (bits[i] == 0) /* find largest codelength still in use */
i--;
bits[i]--;
/* Return final symbol counts (only for lengths 0..16) */
MEMCOPY(htbl->bits, bits, SIZEOF(htbl->bits));
/* Return a list of the symbols sorted by code length */
/* It's not real clear to me why we don't need to consider the codelength
* changes made above, but the JPEG spec seems to think this works.
*/
p = 0;
for (i = 1; i <= MAX_CLEN; i++) {
for (j = 0; j <= 255; j++) {
if (codesize[j] == i) {
htbl->huffval[p] = (UINT8) j;
p++;
}
}
}
/* Set sent_table FALSE so updated table will be written to JPEG file. */
htbl->sent_table = FALSE;
}
/*
* Finish up a statistics-gathering pass and create the new Huffman tables.
*/
METHODDEF(void)
finish_pass_gather (j_compress_ptr cinfo)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
int ci, dctbl, actbl;
jpeg_component_info * compptr;
JHUFF_TBL **htblptr;
boolean did_dc[NUM_HUFF_TBLS];
boolean did_ac[NUM_HUFF_TBLS];
/* It's important not to apply jpeg_gen_optimal_table more than once
* per table, because it clobbers the input frequency counts!
*/
MEMZERO(did_dc, SIZEOF(did_dc));
MEMZERO(did_ac, SIZEOF(did_ac));
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
dctbl = compptr->dc_tbl_no;
actbl = compptr->ac_tbl_no;
if (! did_dc[dctbl]) {
htblptr = & cinfo->dc_huff_tbl_ptrs[dctbl];
if (*htblptr == NULL)
*htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
jpeg_gen_optimal_table(cinfo, *htblptr, entropy->dc_count_ptrs[dctbl]);
did_dc[dctbl] = TRUE;
}
if (! did_ac[actbl]) {
htblptr = & cinfo->ac_huff_tbl_ptrs[actbl];
if (*htblptr == NULL)
*htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
jpeg_gen_optimal_table(cinfo, *htblptr, entropy->ac_count_ptrs[actbl]);
did_ac[actbl] = TRUE;
}
}
}
#endif /* ENTROPY_OPT_SUPPORTED */
/*
* Module initialization routine for Huffman entropy encoding.
*/
GLOBAL(void)
jinit_huff_encoder (j_compress_ptr cinfo)
{
huff_entropy_ptr entropy;
int i;
entropy = (huff_entropy_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(huff_entropy_encoder));
cinfo->entropy = (struct jpeg_entropy_encoder *) entropy;
entropy->pub.start_pass = start_pass_huff;
/* Mark tables unallocated */
for (i = 0; i < NUM_HUFF_TBLS; i++) {
entropy->dc_derived_tbls[i] = entropy->ac_derived_tbls[i] = NULL;
#ifdef ENTROPY_OPT_SUPPORTED
entropy->dc_count_ptrs[i] = entropy->ac_count_ptrs[i] = NULL;
#endif
}
}

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/*
* jcinit.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains initialization logic for the JPEG compressor.
* This routine is in charge of selecting the modules to be executed and
* making an initialization call to each one.
*
* Logically, this code belongs in jcmaster.c. It's split out because
* linking this routine implies linking the entire compression library.
* For a transcoding-only application, we want to be able to use jcmaster.c
* without linking in the whole library.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/*
* Master selection of compression modules.
* This is done once at the start of processing an image. We determine
* which modules will be used and give them appropriate initialization calls.
*/
GLOBAL(void)
jinit_compress_master (j_compress_ptr cinfo)
{
/* Initialize master control (includes parameter checking/processing) */
jinit_c_master_control(cinfo, FALSE /* full compression */);
/* Preprocessing */
if (! cinfo->raw_data_in) {
jinit_color_converter(cinfo);
jinit_downsampler(cinfo);
jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
}
/* Forward DCT */
jinit_forward_dct(cinfo);
/* Entropy encoding: either Huffman or arithmetic coding. */
if (cinfo->arith_code) {
ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
} else {
if (cinfo->progressive_mode) {
#ifdef C_PROGRESSIVE_SUPPORTED
jinit_phuff_encoder(cinfo);
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif
} else
jinit_huff_encoder(cinfo);
}
/* Need a full-image coefficient buffer in any multi-pass mode. */
jinit_c_coef_controller(cinfo,
(boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding));
jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
jinit_marker_writer(cinfo);
/* We can now tell the memory manager to allocate virtual arrays. */
(*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
/* Write the datastream header (SOI) immediately.
* Frame and scan headers are postponed till later.
* This lets application insert special markers after the SOI.
*/
(*cinfo->marker->write_file_header) (cinfo);
}

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/*
* jcmainct.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains the main buffer controller for compression.
* The main buffer lies between the pre-processor and the JPEG
* compressor proper; it holds downsampled data in the JPEG colorspace.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/* Note: currently, there is no operating mode in which a full-image buffer
* is needed at this step. If there were, that mode could not be used with
* "raw data" input, since this module is bypassed in that case. However,
* we've left the code here for possible use in special applications.
*/
#undef FULL_MAIN_BUFFER_SUPPORTED
/* Private buffer controller object */
typedef struct {
struct jpeg_c_main_controller pub; /* public fields */
JDIMENSION cur_iMCU_row; /* number of current iMCU row */
JDIMENSION rowgroup_ctr; /* counts row groups received in iMCU row */
boolean suspended; /* remember if we suspended output */
J_BUF_MODE pass_mode; /* current operating mode */
/* If using just a strip buffer, this points to the entire set of buffers
* (we allocate one for each component). In the full-image case, this
* points to the currently accessible strips of the virtual arrays.
*/
JSAMPARRAY buffer[MAX_COMPONENTS];
#ifdef FULL_MAIN_BUFFER_SUPPORTED
/* If using full-image storage, this array holds pointers to virtual-array
* control blocks for each component. Unused if not full-image storage.
*/
jvirt_sarray_ptr whole_image[MAX_COMPONENTS];
#endif
} my_main_controller;
typedef my_main_controller * my_main_ptr;
/* Forward declarations */
METHODDEF(void) process_data_simple_main
JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,
JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));
#ifdef FULL_MAIN_BUFFER_SUPPORTED
METHODDEF(void) process_data_buffer_main
JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,
JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));
#endif
/*
* Initialize for a processing pass.
*/
METHODDEF(void)
start_pass_main (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
{
my_main_ptr main = (my_main_ptr) cinfo->main;
/* Do nothing in raw-data mode. */
if (cinfo->raw_data_in)
return;
main->cur_iMCU_row = 0; /* initialize counters */
main->rowgroup_ctr = 0;
main->suspended = FALSE;
main->pass_mode = pass_mode; /* save mode for use by process_data */
switch (pass_mode) {
case JBUF_PASS_THRU:
#ifdef FULL_MAIN_BUFFER_SUPPORTED
if (main->whole_image[0] != NULL)
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
#endif
main->pub.process_data = process_data_simple_main;
break;
#ifdef FULL_MAIN_BUFFER_SUPPORTED
case JBUF_SAVE_SOURCE:
case JBUF_CRANK_DEST:
case JBUF_SAVE_AND_PASS:
if (main->whole_image[0] == NULL)
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
main->pub.process_data = process_data_buffer_main;
break;
#endif
default:
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
break;
}
}
/*
* Process some data.
* This routine handles the simple pass-through mode,
* where we have only a strip buffer.
*/
METHODDEF(void)
process_data_simple_main (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
JDIMENSION in_rows_avail)
{
my_main_ptr main = (my_main_ptr) cinfo->main;
while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {
/* Read input data if we haven't filled the main buffer yet */
if (main->rowgroup_ctr < DCTSIZE)
(*cinfo->prep->pre_process_data) (cinfo,
input_buf, in_row_ctr, in_rows_avail,
main->buffer, &main->rowgroup_ctr,
(JDIMENSION) DCTSIZE);
/* If we don't have a full iMCU row buffered, return to application for
* more data. Note that preprocessor will always pad to fill the iMCU row
* at the bottom of the image.
*/
if (main->rowgroup_ctr != DCTSIZE)
return;
/* Send the completed row to the compressor */
if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {
/* If compressor did not consume the whole row, then we must need to
* suspend processing and return to the application. In this situation
* we pretend we didn't yet consume the last input row; otherwise, if
* it happened to be the last row of the image, the application would
* think we were done.
*/
if (! main->suspended) {
(*in_row_ctr)--;
main->suspended = TRUE;
}
return;
}
/* We did finish the row. Undo our little suspension hack if a previous
* call suspended; then mark the main buffer empty.
*/
if (main->suspended) {
(*in_row_ctr)++;
main->suspended = FALSE;
}
main->rowgroup_ctr = 0;
main->cur_iMCU_row++;
}
}
#ifdef FULL_MAIN_BUFFER_SUPPORTED
/*
* Process some data.
* This routine handles all of the modes that use a full-size buffer.
*/
METHODDEF(void)
process_data_buffer_main (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
JDIMENSION in_rows_avail)
{
my_main_ptr main = (my_main_ptr) cinfo->main;
int ci;
jpeg_component_info *compptr;
boolean writing = (main->pass_mode != JBUF_CRANK_DEST);
while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {
/* Realign the virtual buffers if at the start of an iMCU row. */
if (main->rowgroup_ctr == 0) {
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
main->buffer[ci] = (*cinfo->mem->access_virt_sarray)
((j_common_ptr) cinfo, main->whole_image[ci],
main->cur_iMCU_row * (compptr->v_samp_factor * DCTSIZE),
(JDIMENSION) (compptr->v_samp_factor * DCTSIZE), writing);
}
/* In a read pass, pretend we just read some source data. */
if (! writing) {
*in_row_ctr += cinfo->max_v_samp_factor * DCTSIZE;
main->rowgroup_ctr = DCTSIZE;
}
}
/* If a write pass, read input data until the current iMCU row is full. */
/* Note: preprocessor will pad if necessary to fill the last iMCU row. */
if (writing) {
(*cinfo->prep->pre_process_data) (cinfo,
input_buf, in_row_ctr, in_rows_avail,
main->buffer, &main->rowgroup_ctr,
(JDIMENSION) DCTSIZE);
/* Return to application if we need more data to fill the iMCU row. */
if (main->rowgroup_ctr < DCTSIZE)
return;
}
/* Emit data, unless this is a sink-only pass. */
if (main->pass_mode != JBUF_SAVE_SOURCE) {
if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {
/* If compressor did not consume the whole row, then we must need to
* suspend processing and return to the application. In this situation
* we pretend we didn't yet consume the last input row; otherwise, if
* it happened to be the last row of the image, the application would
* think we were done.
*/
if (! main->suspended) {
(*in_row_ctr)--;
main->suspended = TRUE;
}
return;
}
/* We did finish the row. Undo our little suspension hack if a previous
* call suspended; then mark the main buffer empty.
*/
if (main->suspended) {
(*in_row_ctr)++;
main->suspended = FALSE;
}
}
/* If get here, we are done with this iMCU row. Mark buffer empty. */
main->rowgroup_ctr = 0;
main->cur_iMCU_row++;
}
}
#endif /* FULL_MAIN_BUFFER_SUPPORTED */
/*
* Initialize main buffer controller.
*/
GLOBAL(void)
jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer)
{
my_main_ptr main;
int ci;
jpeg_component_info *compptr;
main = (my_main_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_main_controller));
cinfo->main = (struct jpeg_c_main_controller *) main;
main->pub.start_pass = start_pass_main;
/* We don't need to create a buffer in raw-data mode. */
if (cinfo->raw_data_in)
return;
/* Create the buffer. It holds downsampled data, so each component
* may be of a different size.
*/
if (need_full_buffer) {
#ifdef FULL_MAIN_BUFFER_SUPPORTED
/* Allocate a full-image virtual array for each component */
/* Note we pad the bottom to a multiple of the iMCU height */
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
main->whole_image[ci] = (*cinfo->mem->request_virt_sarray)
((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
compptr->width_in_blocks * DCTSIZE,
(JDIMENSION) jround_up((long) compptr->height_in_blocks,
(long) compptr->v_samp_factor) * DCTSIZE,
(JDIMENSION) (compptr->v_samp_factor * DCTSIZE));
}
#else
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
#endif
} else {
#ifdef FULL_MAIN_BUFFER_SUPPORTED
main->whole_image[0] = NULL; /* flag for no virtual arrays */
#endif
/* Allocate a strip buffer for each component */
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
main->buffer[ci] = (*cinfo->mem->alloc_sarray)
((j_common_ptr) cinfo, JPOOL_IMAGE,
compptr->width_in_blocks * DCTSIZE,
(JDIMENSION) (compptr->v_samp_factor * DCTSIZE));
}
}
}

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/*
* jcmarker.c
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains routines to write JPEG datastream markers.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
typedef enum { /* JPEG marker codes */
M_SOF0 = 0xc0,
M_SOF1 = 0xc1,
M_SOF2 = 0xc2,
M_SOF3 = 0xc3,
M_SOF5 = 0xc5,
M_SOF6 = 0xc6,
M_SOF7 = 0xc7,
M_JPG = 0xc8,
M_SOF9 = 0xc9,
M_SOF10 = 0xca,
M_SOF11 = 0xcb,
M_SOF13 = 0xcd,
M_SOF14 = 0xce,
M_SOF15 = 0xcf,
M_DHT = 0xc4,
M_DAC = 0xcc,
M_RST0 = 0xd0,
M_RST1 = 0xd1,
M_RST2 = 0xd2,
M_RST3 = 0xd3,
M_RST4 = 0xd4,
M_RST5 = 0xd5,
M_RST6 = 0xd6,
M_RST7 = 0xd7,
M_SOI = 0xd8,
M_EOI = 0xd9,
M_SOS = 0xda,
M_DQT = 0xdb,
M_DNL = 0xdc,
M_DRI = 0xdd,
M_DHP = 0xde,
M_EXP = 0xdf,
M_APP0 = 0xe0,
M_APP1 = 0xe1,
M_APP2 = 0xe2,
M_APP3 = 0xe3,
M_APP4 = 0xe4,
M_APP5 = 0xe5,
M_APP6 = 0xe6,
M_APP7 = 0xe7,
M_APP8 = 0xe8,
M_APP9 = 0xe9,
M_APP10 = 0xea,
M_APP11 = 0xeb,
M_APP12 = 0xec,
M_APP13 = 0xed,
M_APP14 = 0xee,
M_APP15 = 0xef,
M_JPG0 = 0xf0,
M_JPG13 = 0xfd,
M_COM = 0xfe,
M_TEM = 0x01,
M_ERROR = 0x100
} JPEG_MARKER;
/* Private state */
typedef struct {
struct jpeg_marker_writer pub; /* public fields */
unsigned int last_restart_interval; /* last DRI value emitted; 0 after SOI */
} my_marker_writer;
typedef my_marker_writer * my_marker_ptr;
/*
* Basic output routines.
*
* Note that we do not support suspension while writing a marker.
* Therefore, an application using suspension must ensure that there is
* enough buffer space for the initial markers (typ. 600-700 bytes) before
* calling jpeg_start_compress, and enough space to write the trailing EOI
* (a few bytes) before calling jpeg_finish_compress. Multipass compression
* modes are not supported at all with suspension, so those two are the only
* points where markers will be written.
*/
LOCAL(void)
emit_byte (j_compress_ptr cinfo, int val)
/* Emit a byte */
{
struct jpeg_destination_mgr * dest = cinfo->dest;
*(dest->next_output_byte)++ = (JOCTET) val;
if (--dest->free_in_buffer == 0) {
if (! (*dest->empty_output_buffer) (cinfo))
ERREXIT(cinfo, JERR_CANT_SUSPEND);
}
}
LOCAL(void)
emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark)
/* Emit a marker code */
{
emit_byte(cinfo, 0xFF);
emit_byte(cinfo, (int) mark);
}
LOCAL(void)
emit_2bytes (j_compress_ptr cinfo, int value)
/* Emit a 2-byte integer; these are always MSB first in JPEG files */
{
emit_byte(cinfo, (value >> 8) & 0xFF);
emit_byte(cinfo, value & 0xFF);
}
/*
* Routines to write specific marker types.
*/
LOCAL(int)
emit_dqt (j_compress_ptr cinfo, int index)
/* Emit a DQT marker */
/* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */
{
JQUANT_TBL * qtbl = cinfo->quant_tbl_ptrs[index];
int prec;
int i;
if (qtbl == NULL)
ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, index);
prec = 0;
for (i = 0; i < DCTSIZE2; i++) {
if (qtbl->quantval[i] > 255)
prec = 1;
}
if (! qtbl->sent_table) {
emit_marker(cinfo, M_DQT);
emit_2bytes(cinfo, prec ? DCTSIZE2*2 + 1 + 2 : DCTSIZE2 + 1 + 2);
emit_byte(cinfo, index + (prec<<4));
for (i = 0; i < DCTSIZE2; i++) {
/* The table entries must be emitted in zigzag order. */
unsigned int qval = qtbl->quantval[jpeg_natural_order[i]];
if (prec)
emit_byte(cinfo, (int) (qval >> 8));
emit_byte(cinfo, (int) (qval & 0xFF));
}
qtbl->sent_table = TRUE;
}
return prec;
}
LOCAL(void)
emit_dht (j_compress_ptr cinfo, int index, boolean is_ac)
/* Emit a DHT marker */
{
JHUFF_TBL * htbl;
int length, i;
if (is_ac) {
htbl = cinfo->ac_huff_tbl_ptrs[index];
index += 0x10; /* output index has AC bit set */
} else {
htbl = cinfo->dc_huff_tbl_ptrs[index];
}
if (htbl == NULL)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, index);
if (! htbl->sent_table) {
emit_marker(cinfo, M_DHT);
length = 0;
for (i = 1; i <= 16; i++)
length += htbl->bits[i];
emit_2bytes(cinfo, length + 2 + 1 + 16);
emit_byte(cinfo, index);
for (i = 1; i <= 16; i++)
emit_byte(cinfo, htbl->bits[i]);
for (i = 0; i < length; i++)
emit_byte(cinfo, htbl->huffval[i]);
htbl->sent_table = TRUE;
}
}
LOCAL(void)
emit_dac (j_compress_ptr cinfo)
/* Emit a DAC marker */
/* Since the useful info is so small, we want to emit all the tables in */
/* one DAC marker. Therefore this routine does its own scan of the table. */
{
#ifdef C_ARITH_CODING_SUPPORTED
char dc_in_use[NUM_ARITH_TBLS];
char ac_in_use[NUM_ARITH_TBLS];
int length, i;
jpeg_component_info *compptr;
for (i = 0; i < NUM_ARITH_TBLS; i++)
dc_in_use[i] = ac_in_use[i] = 0;
for (i = 0; i < cinfo->comps_in_scan; i++) {
compptr = cinfo->cur_comp_info[i];
dc_in_use[compptr->dc_tbl_no] = 1;
ac_in_use[compptr->ac_tbl_no] = 1;
}
length = 0;
for (i = 0; i < NUM_ARITH_TBLS; i++)
length += dc_in_use[i] + ac_in_use[i];
emit_marker(cinfo, M_DAC);
emit_2bytes(cinfo, length*2 + 2);
for (i = 0; i < NUM_ARITH_TBLS; i++) {
if (dc_in_use[i]) {
emit_byte(cinfo, i);
emit_byte(cinfo, cinfo->arith_dc_L[i] + (cinfo->arith_dc_U[i]<<4));
}
if (ac_in_use[i]) {
emit_byte(cinfo, i + 0x10);
emit_byte(cinfo, cinfo->arith_ac_K[i]);
}
}
#endif /* C_ARITH_CODING_SUPPORTED */
}
LOCAL(void)
emit_dri (j_compress_ptr cinfo)
/* Emit a DRI marker */
{
emit_marker(cinfo, M_DRI);
emit_2bytes(cinfo, 4); /* fixed length */
emit_2bytes(cinfo, (int) cinfo->restart_interval);
}
LOCAL(void)
emit_sof (j_compress_ptr cinfo, JPEG_MARKER code)
/* Emit a SOF marker */
{
int ci;
jpeg_component_info *compptr;
emit_marker(cinfo, code);
emit_2bytes(cinfo, 3 * cinfo->num_components + 2 + 5 + 1); /* length */
/* Make sure image isn't bigger than SOF field can handle */
if ((long) cinfo->image_height > 65535L ||
(long) cinfo->image_width > 65535L)
ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) 65535);
emit_byte(cinfo, cinfo->data_precision);
emit_2bytes(cinfo, (int) cinfo->image_height);
emit_2bytes(cinfo, (int) cinfo->image_width);
emit_byte(cinfo, cinfo->num_components);
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
emit_byte(cinfo, compptr->component_id);
emit_byte(cinfo, (compptr->h_samp_factor << 4) + compptr->v_samp_factor);
emit_byte(cinfo, compptr->quant_tbl_no);
}
}
LOCAL(void)
emit_sos (j_compress_ptr cinfo)
/* Emit a SOS marker */
{
int i, td, ta;
jpeg_component_info *compptr;
emit_marker(cinfo, M_SOS);
emit_2bytes(cinfo, 2 * cinfo->comps_in_scan + 2 + 1 + 3); /* length */
emit_byte(cinfo, cinfo->comps_in_scan);
for (i = 0; i < cinfo->comps_in_scan; i++) {
compptr = cinfo->cur_comp_info[i];
emit_byte(cinfo, compptr->component_id);
td = compptr->dc_tbl_no;
ta = compptr->ac_tbl_no;
if (cinfo->progressive_mode) {
/* Progressive mode: only DC or only AC tables are used in one scan;
* furthermore, Huffman coding of DC refinement uses no table at all.
* We emit 0 for unused field(s); this is recommended by the P&M text
* but does not seem to be specified in the standard.
*/
if (cinfo->Ss == 0) {
ta = 0; /* DC scan */
if (cinfo->Ah != 0 && !cinfo->arith_code)
td = 0; /* no DC table either */
} else {
td = 0; /* AC scan */
}
}
emit_byte(cinfo, (td << 4) + ta);
}
emit_byte(cinfo, cinfo->Ss);
emit_byte(cinfo, cinfo->Se);
emit_byte(cinfo, (cinfo->Ah << 4) + cinfo->Al);
}
LOCAL(void)
emit_jfif_app0 (j_compress_ptr cinfo)
/* Emit a JFIF-compliant APP0 marker */
{
/*
* Length of APP0 block (2 bytes)
* Block ID (4 bytes - ASCII "JFIF")
* Zero byte (1 byte to terminate the ID string)
* Version Major, Minor (2 bytes - major first)
* Units (1 byte - 0x00 = none, 0x01 = inch, 0x02 = cm)
* Xdpu (2 bytes - dots per unit horizontal)
* Ydpu (2 bytes - dots per unit vertical)
* Thumbnail X size (1 byte)
* Thumbnail Y size (1 byte)
*/
emit_marker(cinfo, M_APP0);
emit_2bytes(cinfo, 2 + 4 + 1 + 2 + 1 + 2 + 2 + 1 + 1); /* length */
emit_byte(cinfo, 0x4A); /* Identifier: ASCII "JFIF" */
emit_byte(cinfo, 0x46);
emit_byte(cinfo, 0x49);
emit_byte(cinfo, 0x46);
emit_byte(cinfo, 0);
emit_byte(cinfo, cinfo->JFIF_major_version); /* Version fields */
emit_byte(cinfo, cinfo->JFIF_minor_version);
emit_byte(cinfo, cinfo->density_unit); /* Pixel size information */
emit_2bytes(cinfo, (int) cinfo->X_density);
emit_2bytes(cinfo, (int) cinfo->Y_density);
emit_byte(cinfo, 0); /* No thumbnail image */
emit_byte(cinfo, 0);
}
LOCAL(void)
emit_adobe_app14 (j_compress_ptr cinfo)
/* Emit an Adobe APP14 marker */
{
/*
* Length of APP14 block (2 bytes)
* Block ID (5 bytes - ASCII "Adobe")
* Version Number (2 bytes - currently 100)
* Flags0 (2 bytes - currently 0)
* Flags1 (2 bytes - currently 0)
* Color transform (1 byte)
*
* Although Adobe TN 5116 mentions Version = 101, all the Adobe files
* now in circulation seem to use Version = 100, so that's what we write.
*
* We write the color transform byte as 1 if the JPEG color space is
* YCbCr, 2 if it's YCCK, 0 otherwise. Adobe's definition has to do with
* whether the encoder performed a transformation, which is pretty useless.
*/
emit_marker(cinfo, M_APP14);
emit_2bytes(cinfo, 2 + 5 + 2 + 2 + 2 + 1); /* length */
emit_byte(cinfo, 0x41); /* Identifier: ASCII "Adobe" */
emit_byte(cinfo, 0x64);
emit_byte(cinfo, 0x6F);
emit_byte(cinfo, 0x62);
emit_byte(cinfo, 0x65);
emit_2bytes(cinfo, 100); /* Version */
emit_2bytes(cinfo, 0); /* Flags0 */
emit_2bytes(cinfo, 0); /* Flags1 */
switch (cinfo->jpeg_color_space) {
case JCS_YCbCr:
emit_byte(cinfo, 1); /* Color transform = 1 */
break;
case JCS_YCCK:
emit_byte(cinfo, 2); /* Color transform = 2 */
break;
default:
emit_byte(cinfo, 0); /* Color transform = 0 */
break;
}
}
/*
* These routines allow writing an arbitrary marker with parameters.
* The only intended use is to emit COM or APPn markers after calling
* write_file_header and before calling write_frame_header.
* Other uses are not guaranteed to produce desirable results.
* Counting the parameter bytes properly is the caller's responsibility.
*/
METHODDEF(void)
write_marker_header (j_compress_ptr cinfo, int marker, unsigned int datalen)
/* Emit an arbitrary marker header */
{
if (datalen > (unsigned int) 65533) /* safety check */
ERREXIT(cinfo, JERR_BAD_LENGTH);
emit_marker(cinfo, (JPEG_MARKER) marker);
emit_2bytes(cinfo, (int) (datalen + 2)); /* total length */
}
METHODDEF(void)
write_marker_byte (j_compress_ptr cinfo, int val)
/* Emit one byte of marker parameters following write_marker_header */
{
emit_byte(cinfo, val);
}
/*
* Write datastream header.
* This consists of an SOI and optional APPn markers.
* We recommend use of the JFIF marker, but not the Adobe marker,
* when using YCbCr or grayscale data. The JFIF marker should NOT
* be used for any other JPEG colorspace. The Adobe marker is helpful
* to distinguish RGB, CMYK, and YCCK colorspaces.
* Note that an application can write additional header markers after
* jpeg_start_compress returns.
*/
METHODDEF(void)
write_file_header (j_compress_ptr cinfo)
{
my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
emit_marker(cinfo, M_SOI); /* first the SOI */
/* SOI is defined to reset restart interval to 0 */
marker->last_restart_interval = 0;
if (cinfo->write_JFIF_header) /* next an optional JFIF APP0 */
emit_jfif_app0(cinfo);
if (cinfo->write_Adobe_marker) /* next an optional Adobe APP14 */
emit_adobe_app14(cinfo);
}
/*
* Write frame header.
* This consists of DQT and SOFn markers.
* Note that we do not emit the SOF until we have emitted the DQT(s).
* This avoids compatibility problems with incorrect implementations that
* try to error-check the quant table numbers as soon as they see the SOF.
*/
METHODDEF(void)
write_frame_header (j_compress_ptr cinfo)
{
int ci, prec;
boolean is_baseline;
jpeg_component_info *compptr;
/* Emit DQT for each quantization table.
* Note that emit_dqt() suppresses any duplicate tables.
*/
prec = 0;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
prec += emit_dqt(cinfo, compptr->quant_tbl_no);
}
/* now prec is nonzero iff there are any 16-bit quant tables. */
/* Check for a non-baseline specification.
* Note we assume that Huffman table numbers won't be changed later.
*/
if (cinfo->arith_code || cinfo->progressive_mode ||
cinfo->data_precision != 8) {
is_baseline = FALSE;
} else {
is_baseline = TRUE;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
if (compptr->dc_tbl_no > 1 || compptr->ac_tbl_no > 1)
is_baseline = FALSE;
}
if (prec && is_baseline) {
is_baseline = FALSE;
/* If it's baseline except for quantizer size, warn the user */
TRACEMS(cinfo, 0, JTRC_16BIT_TABLES);
}
}
/* Emit the proper SOF marker */
if (cinfo->arith_code) {
emit_sof(cinfo, M_SOF9); /* SOF code for arithmetic coding */
} else {
if (cinfo->progressive_mode)
emit_sof(cinfo, M_SOF2); /* SOF code for progressive Huffman */
else if (is_baseline)
emit_sof(cinfo, M_SOF0); /* SOF code for baseline implementation */
else
emit_sof(cinfo, M_SOF1); /* SOF code for non-baseline Huffman file */
}
}
/*
* Write scan header.
* This consists of DHT or DAC markers, optional DRI, and SOS.
* Compressed data will be written following the SOS.
*/
METHODDEF(void)
write_scan_header (j_compress_ptr cinfo)
{
my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
int i;
jpeg_component_info *compptr;
if (cinfo->arith_code) {
/* Emit arith conditioning info. We may have some duplication
* if the file has multiple scans, but it's so small it's hardly
* worth worrying about.
*/
emit_dac(cinfo);
} else {
/* Emit Huffman tables.
* Note that emit_dht() suppresses any duplicate tables.
*/
for (i = 0; i < cinfo->comps_in_scan; i++) {
compptr = cinfo->cur_comp_info[i];
if (cinfo->progressive_mode) {
/* Progressive mode: only DC or only AC tables are used in one scan */
if (cinfo->Ss == 0) {
if (cinfo->Ah == 0) /* DC needs no table for refinement scan */
emit_dht(cinfo, compptr->dc_tbl_no, FALSE);
} else {
emit_dht(cinfo, compptr->ac_tbl_no, TRUE);
}
} else {
/* Sequential mode: need both DC and AC tables */
emit_dht(cinfo, compptr->dc_tbl_no, FALSE);
emit_dht(cinfo, compptr->ac_tbl_no, TRUE);
}
}
}
/* Emit DRI if required --- note that DRI value could change for each scan.
* We avoid wasting space with unnecessary DRIs, however.
*/
if (cinfo->restart_interval != marker->last_restart_interval) {
emit_dri(cinfo);
marker->last_restart_interval = cinfo->restart_interval;
}
emit_sos(cinfo);
}
/*
* Write datastream trailer.
*/
METHODDEF(void)
write_file_trailer (j_compress_ptr cinfo)
{
emit_marker(cinfo, M_EOI);
}
/*
* Write an abbreviated table-specification datastream.
* This consists of SOI, DQT and DHT tables, and EOI.
* Any table that is defined and not marked sent_table = TRUE will be
* emitted. Note that all tables will be marked sent_table = TRUE at exit.
*/
METHODDEF(void)
write_tables_only (j_compress_ptr cinfo)
{
int i;
emit_marker(cinfo, M_SOI);
for (i = 0; i < NUM_QUANT_TBLS; i++) {
if (cinfo->quant_tbl_ptrs[i] != NULL)
(void) emit_dqt(cinfo, i);
}
if (! cinfo->arith_code) {
for (i = 0; i < NUM_HUFF_TBLS; i++) {
if (cinfo->dc_huff_tbl_ptrs[i] != NULL)
emit_dht(cinfo, i, FALSE);
if (cinfo->ac_huff_tbl_ptrs[i] != NULL)
emit_dht(cinfo, i, TRUE);
}
}
emit_marker(cinfo, M_EOI);
}
/*
* Initialize the marker writer module.
*/
GLOBAL(void)
jinit_marker_writer (j_compress_ptr cinfo)
{
my_marker_ptr marker;
/* Create the subobject */
marker = (my_marker_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_marker_writer));
cinfo->marker = (struct jpeg_marker_writer *) marker;
/* Initialize method pointers */
marker->pub.write_file_header = write_file_header;
marker->pub.write_frame_header = write_frame_header;
marker->pub.write_scan_header = write_scan_header;
marker->pub.write_file_trailer = write_file_trailer;
marker->pub.write_tables_only = write_tables_only;
marker->pub.write_marker_header = write_marker_header;
marker->pub.write_marker_byte = write_marker_byte;
/* Initialize private state */
marker->last_restart_interval = 0;
}

590
src/3rdparty/src/jpeg-6b/jcmaster.c vendored
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@ -1,590 +0,0 @@
/*
* jcmaster.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains master control logic for the JPEG compressor.
* These routines are concerned with parameter validation, initial setup,
* and inter-pass control (determining the number of passes and the work
* to be done in each pass).
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/* Private state */
typedef enum {
main_pass, /* input data, also do first output step */
huff_opt_pass, /* Huffman code optimization pass */
output_pass /* data output pass */
} c_pass_type;
typedef struct {
struct jpeg_comp_master pub; /* public fields */
c_pass_type pass_type; /* the type of the current pass */
int pass_number; /* # of passes completed */
int total_passes; /* total # of passes needed */
int scan_number; /* current index in scan_info[] */
} my_comp_master;
typedef my_comp_master * my_master_ptr;
/*
* Support routines that do various essential calculations.
*/
LOCAL(void)
initial_setup (j_compress_ptr cinfo)
/* Do computations that are needed before master selection phase */
{
int ci;
jpeg_component_info *compptr;
long samplesperrow;
JDIMENSION jd_samplesperrow;
/* Sanity check on image dimensions */
if (cinfo->image_height <= 0 || cinfo->image_width <= 0
|| cinfo->num_components <= 0 || cinfo->input_components <= 0)
ERREXIT(cinfo, JERR_EMPTY_IMAGE);
/* Make sure image isn't bigger than I can handle */
if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION ||
(long) cinfo->image_width > (long) JPEG_MAX_DIMENSION)
ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION);
/* Width of an input scanline must be representable as JDIMENSION. */
samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components;
jd_samplesperrow = (JDIMENSION) samplesperrow;
if ((long) jd_samplesperrow != samplesperrow)
ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
/* For now, precision must match compiled-in value... */
if (cinfo->data_precision != BITS_IN_JSAMPLE)
ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
/* Check that number of components won't exceed internal array sizes */
if (cinfo->num_components > MAX_COMPONENTS)
ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
MAX_COMPONENTS);
/* Compute maximum sampling factors; check factor validity */
cinfo->max_h_samp_factor = 1;
cinfo->max_v_samp_factor = 1;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR ||
compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR)
ERREXIT(cinfo, JERR_BAD_SAMPLING);
cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor,
compptr->h_samp_factor);
cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor,
compptr->v_samp_factor);
}
/* Compute dimensions of components */
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
/* Fill in the correct component_index value; don't rely on application */
compptr->component_index = ci;
/* For compression, we never do DCT scaling. */
compptr->DCT_scaled_size = DCTSIZE;
/* Size in DCT blocks */
compptr->width_in_blocks = (JDIMENSION)
jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor,
(long) (cinfo->max_h_samp_factor * DCTSIZE));
compptr->height_in_blocks = (JDIMENSION)
jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor,
(long) (cinfo->max_v_samp_factor * DCTSIZE));
/* Size in samples */
compptr->downsampled_width = (JDIMENSION)
jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor,
(long) cinfo->max_h_samp_factor);
compptr->downsampled_height = (JDIMENSION)
jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor,
(long) cinfo->max_v_samp_factor);
/* Mark component needed (this flag isn't actually used for compression) */
compptr->component_needed = TRUE;
}
/* Compute number of fully interleaved MCU rows (number of times that
* main controller will call coefficient controller).
*/
cinfo->total_iMCU_rows = (JDIMENSION)
jdiv_round_up((long) cinfo->image_height,
(long) (cinfo->max_v_samp_factor*DCTSIZE));
}
#ifdef C_MULTISCAN_FILES_SUPPORTED
LOCAL(void)
validate_script (j_compress_ptr cinfo)
/* Verify that the scan script in cinfo->scan_info[] is valid; also
* determine whether it uses progressive JPEG, and set cinfo->progressive_mode.
*/
{
const jpeg_scan_info * scanptr;
int scanno, ncomps, ci, coefi, thisi;
int Ss, Se, Ah, Al;
boolean component_sent[MAX_COMPONENTS];
#ifdef C_PROGRESSIVE_SUPPORTED
int * last_bitpos_ptr;
int last_bitpos[MAX_COMPONENTS][DCTSIZE2];
/* -1 until that coefficient has been seen; then last Al for it */
#endif
if (cinfo->num_scans <= 0)
ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, 0);
/* For sequential JPEG, all scans must have Ss=0, Se=DCTSIZE2-1;
* for progressive JPEG, no scan can have this.
*/
scanptr = cinfo->scan_info;
if (scanptr->Ss != 0 || scanptr->Se != DCTSIZE2-1) {
#ifdef C_PROGRESSIVE_SUPPORTED
cinfo->progressive_mode = TRUE;
last_bitpos_ptr = & last_bitpos[0][0];
for (ci = 0; ci < cinfo->num_components; ci++)
for (coefi = 0; coefi < DCTSIZE2; coefi++)
*last_bitpos_ptr++ = -1;
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif
} else {
cinfo->progressive_mode = FALSE;
for (ci = 0; ci < cinfo->num_components; ci++)
component_sent[ci] = FALSE;
}
for (scanno = 1; scanno <= cinfo->num_scans; scanptr++, scanno++) {
/* Validate component indexes */
ncomps = scanptr->comps_in_scan;
if (ncomps <= 0 || ncomps > MAX_COMPS_IN_SCAN)
ERREXIT2(cinfo, JERR_COMPONENT_COUNT, ncomps, MAX_COMPS_IN_SCAN);
for (ci = 0; ci < ncomps; ci++) {
thisi = scanptr->component_index[ci];
if (thisi < 0 || thisi >= cinfo->num_components)
ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno);
/* Components must appear in SOF order within each scan */
if (ci > 0 && thisi <= scanptr->component_index[ci-1])
ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno);
}
/* Validate progression parameters */
Ss = scanptr->Ss;
Se = scanptr->Se;
Ah = scanptr->Ah;
Al = scanptr->Al;
if (cinfo->progressive_mode) {
#ifdef C_PROGRESSIVE_SUPPORTED
/* The JPEG spec simply gives the ranges 0..13 for Ah and Al, but that
* seems wrong: the upper bound ought to depend on data precision.
* Perhaps they really meant 0..N+1 for N-bit precision.
* Here we allow 0..10 for 8-bit data; Al larger than 10 results in
* out-of-range reconstructed DC values during the first DC scan,
* which might cause problems for some decoders.
*/
#if BITS_IN_JSAMPLE == 8
#define MAX_AH_AL 10
#else
#define MAX_AH_AL 13
#endif
if (Ss < 0 || Ss >= DCTSIZE2 || Se < Ss || Se >= DCTSIZE2 ||
Ah < 0 || Ah > MAX_AH_AL || Al < 0 || Al > MAX_AH_AL)
ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
if (Ss == 0) {
if (Se != 0) /* DC and AC together not OK */
ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
} else {
if (ncomps != 1) /* AC scans must be for only one component */
ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
}
for (ci = 0; ci < ncomps; ci++) {
last_bitpos_ptr = & last_bitpos[scanptr->component_index[ci]][0];
if (Ss != 0 && last_bitpos_ptr[0] < 0) /* AC without prior DC scan */
ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
for (coefi = Ss; coefi <= Se; coefi++) {
if (last_bitpos_ptr[coefi] < 0) {
/* first scan of this coefficient */
if (Ah != 0)
ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
} else {
/* not first scan */
if (Ah != last_bitpos_ptr[coefi] || Al != Ah-1)
ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
}
last_bitpos_ptr[coefi] = Al;
}
}
#endif
} else {
/* For sequential JPEG, all progression parameters must be these: */
if (Ss != 0 || Se != DCTSIZE2-1 || Ah != 0 || Al != 0)
ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
/* Make sure components are not sent twice */
for (ci = 0; ci < ncomps; ci++) {
thisi = scanptr->component_index[ci];
if (component_sent[thisi])
ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno);
component_sent[thisi] = TRUE;
}
}
}
/* Now verify that everything got sent. */
if (cinfo->progressive_mode) {
#ifdef C_PROGRESSIVE_SUPPORTED
/* For progressive mode, we only check that at least some DC data
* got sent for each component; the spec does not require that all bits
* of all coefficients be transmitted. Would it be wiser to enforce
* transmission of all coefficient bits??
*/
for (ci = 0; ci < cinfo->num_components; ci++) {
if (last_bitpos[ci][0] < 0)
ERREXIT(cinfo, JERR_MISSING_DATA);
}
#endif
} else {
for (ci = 0; ci < cinfo->num_components; ci++) {
if (! component_sent[ci])
ERREXIT(cinfo, JERR_MISSING_DATA);
}
}
}
#endif /* C_MULTISCAN_FILES_SUPPORTED */
LOCAL(void)
select_scan_parameters (j_compress_ptr cinfo)
/* Set up the scan parameters for the current scan */
{
int ci;
#ifdef C_MULTISCAN_FILES_SUPPORTED
if (cinfo->scan_info != NULL) {
/* Prepare for current scan --- the script is already validated */
my_master_ptr master = (my_master_ptr) cinfo->master;
const jpeg_scan_info * scanptr = cinfo->scan_info + master->scan_number;
cinfo->comps_in_scan = scanptr->comps_in_scan;
for (ci = 0; ci < scanptr->comps_in_scan; ci++) {
cinfo->cur_comp_info[ci] =
&cinfo->comp_info[scanptr->component_index[ci]];
}
cinfo->Ss = scanptr->Ss;
cinfo->Se = scanptr->Se;
cinfo->Ah = scanptr->Ah;
cinfo->Al = scanptr->Al;
}
else
#endif
{
/* Prepare for single sequential-JPEG scan containing all components */
if (cinfo->num_components > MAX_COMPS_IN_SCAN)
ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
MAX_COMPS_IN_SCAN);
cinfo->comps_in_scan = cinfo->num_components;
for (ci = 0; ci < cinfo->num_components; ci++) {
cinfo->cur_comp_info[ci] = &cinfo->comp_info[ci];
}
cinfo->Ss = 0;
cinfo->Se = DCTSIZE2-1;
cinfo->Ah = 0;
cinfo->Al = 0;
}
}
LOCAL(void)
per_scan_setup (j_compress_ptr cinfo)
/* Do computations that are needed before processing a JPEG scan */
/* cinfo->comps_in_scan and cinfo->cur_comp_info[] are already set */
{
int ci, mcublks, tmp;
jpeg_component_info *compptr;
if (cinfo->comps_in_scan == 1) {
/* Noninterleaved (single-component) scan */
compptr = cinfo->cur_comp_info[0];
/* Overall image size in MCUs */
cinfo->MCUs_per_row = compptr->width_in_blocks;
cinfo->MCU_rows_in_scan = compptr->height_in_blocks;
/* For noninterleaved scan, always one block per MCU */
compptr->MCU_width = 1;
compptr->MCU_height = 1;
compptr->MCU_blocks = 1;
compptr->MCU_sample_width = DCTSIZE;
compptr->last_col_width = 1;
/* For noninterleaved scans, it is convenient to define last_row_height
* as the number of block rows present in the last iMCU row.
*/
tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
if (tmp == 0) tmp = compptr->v_samp_factor;
compptr->last_row_height = tmp;
/* Prepare array describing MCU composition */
cinfo->blocks_in_MCU = 1;
cinfo->MCU_membership[0] = 0;
} else {
/* Interleaved (multi-component) scan */
if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN)
ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan,
MAX_COMPS_IN_SCAN);
/* Overall image size in MCUs */
cinfo->MCUs_per_row = (JDIMENSION)
jdiv_round_up((long) cinfo->image_width,
(long) (cinfo->max_h_samp_factor*DCTSIZE));
cinfo->MCU_rows_in_scan = (JDIMENSION)
jdiv_round_up((long) cinfo->image_height,
(long) (cinfo->max_v_samp_factor*DCTSIZE));
cinfo->blocks_in_MCU = 0;
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
/* Sampling factors give # of blocks of component in each MCU */
compptr->MCU_width = compptr->h_samp_factor;
compptr->MCU_height = compptr->v_samp_factor;
compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height;
compptr->MCU_sample_width = compptr->MCU_width * DCTSIZE;
/* Figure number of non-dummy blocks in last MCU column & row */
tmp = (int) (compptr->width_in_blocks % compptr->MCU_width);
if (tmp == 0) tmp = compptr->MCU_width;
compptr->last_col_width = tmp;
tmp = (int) (compptr->height_in_blocks % compptr->MCU_height);
if (tmp == 0) tmp = compptr->MCU_height;
compptr->last_row_height = tmp;
/* Prepare array describing MCU composition */
mcublks = compptr->MCU_blocks;
if (cinfo->blocks_in_MCU + mcublks > C_MAX_BLOCKS_IN_MCU)
ERREXIT(cinfo, JERR_BAD_MCU_SIZE);
while (mcublks-- > 0) {
cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci;
}
}
}
/* Convert restart specified in rows to actual MCU count. */
/* Note that count must fit in 16 bits, so we provide limiting. */
if (cinfo->restart_in_rows > 0) {
long nominal = (long) cinfo->restart_in_rows * (long) cinfo->MCUs_per_row;
cinfo->restart_interval = (unsigned int) MIN(nominal, 65535L);
}
}
/*
* Per-pass setup.
* This is called at the beginning of each pass. We determine which modules
* will be active during this pass and give them appropriate start_pass calls.
* We also set is_last_pass to indicate whether any more passes will be
* required.
*/
METHODDEF(void)
prepare_for_pass (j_compress_ptr cinfo)
{
my_master_ptr master = (my_master_ptr) cinfo->master;
switch (master->pass_type) {
case main_pass:
/* Initial pass: will collect input data, and do either Huffman
* optimization or data output for the first scan.
*/
select_scan_parameters(cinfo);
per_scan_setup(cinfo);
if (! cinfo->raw_data_in) {
(*cinfo->cconvert->start_pass) (cinfo);
(*cinfo->downsample->start_pass) (cinfo);
(*cinfo->prep->start_pass) (cinfo, JBUF_PASS_THRU);
}
(*cinfo->fdct->start_pass) (cinfo);
(*cinfo->entropy->start_pass) (cinfo, cinfo->optimize_coding);
(*cinfo->coef->start_pass) (cinfo,
(master->total_passes > 1 ?
JBUF_SAVE_AND_PASS : JBUF_PASS_THRU));
(*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU);
if (cinfo->optimize_coding) {
/* No immediate data output; postpone writing frame/scan headers */
master->pub.call_pass_startup = FALSE;
} else {
/* Will write frame/scan headers at first jpeg_write_scanlines call */
master->pub.call_pass_startup = TRUE;
}
break;
#ifdef ENTROPY_OPT_SUPPORTED
case huff_opt_pass:
/* Do Huffman optimization for a scan after the first one. */
select_scan_parameters(cinfo);
per_scan_setup(cinfo);
if (cinfo->Ss != 0 || cinfo->Ah == 0 || cinfo->arith_code) {
(*cinfo->entropy->start_pass) (cinfo, TRUE);
(*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST);
master->pub.call_pass_startup = FALSE;
break;
}
/* Special case: Huffman DC refinement scans need no Huffman table
* and therefore we can skip the optimization pass for them.
*/
master->pass_type = output_pass;
master->pass_number++;
/*FALLTHROUGH*/
#endif
case output_pass:
/* Do a data-output pass. */
/* We need not repeat per-scan setup if prior optimization pass did it. */
if (! cinfo->optimize_coding) {
select_scan_parameters(cinfo);
per_scan_setup(cinfo);
}
(*cinfo->entropy->start_pass) (cinfo, FALSE);
(*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST);
/* We emit frame/scan headers now */
if (master->scan_number == 0)
(*cinfo->marker->write_frame_header) (cinfo);
(*cinfo->marker->write_scan_header) (cinfo);
master->pub.call_pass_startup = FALSE;
break;
default:
ERREXIT(cinfo, JERR_NOT_COMPILED);
}
master->pub.is_last_pass = (master->pass_number == master->total_passes-1);
/* Set up progress monitor's pass info if present */
if (cinfo->progress != NULL) {
cinfo->progress->completed_passes = master->pass_number;
cinfo->progress->total_passes = master->total_passes;
}
}
/*
* Special start-of-pass hook.
* This is called by jpeg_write_scanlines if call_pass_startup is TRUE.
* In single-pass processing, we need this hook because we don't want to
* write frame/scan headers during jpeg_start_compress; we want to let the
* application write COM markers etc. between jpeg_start_compress and the
* jpeg_write_scanlines loop.
* In multi-pass processing, this routine is not used.
*/
METHODDEF(void)
pass_startup (j_compress_ptr cinfo)
{
cinfo->master->call_pass_startup = FALSE; /* reset flag so call only once */
(*cinfo->marker->write_frame_header) (cinfo);
(*cinfo->marker->write_scan_header) (cinfo);
}
/*
* Finish up at end of pass.
*/
METHODDEF(void)
finish_pass_master (j_compress_ptr cinfo)
{
my_master_ptr master = (my_master_ptr) cinfo->master;
/* The entropy coder always needs an end-of-pass call,
* either to analyze statistics or to flush its output buffer.
*/
(*cinfo->entropy->finish_pass) (cinfo);
/* Update state for next pass */
switch (master->pass_type) {
case main_pass:
/* next pass is either output of scan 0 (after optimization)
* or output of scan 1 (if no optimization).
*/
master->pass_type = output_pass;
if (! cinfo->optimize_coding)
master->scan_number++;
break;
case huff_opt_pass:
/* next pass is always output of current scan */
master->pass_type = output_pass;
break;
case output_pass:
/* next pass is either optimization or output of next scan */
if (cinfo->optimize_coding)
master->pass_type = huff_opt_pass;
master->scan_number++;
break;
}
master->pass_number++;
}
/*
* Initialize master compression control.
*/
GLOBAL(void)
jinit_c_master_control (j_compress_ptr cinfo, boolean transcode_only)
{
my_master_ptr master;
master = (my_master_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_comp_master));
cinfo->master = (struct jpeg_comp_master *) master;
master->pub.prepare_for_pass = prepare_for_pass;
master->pub.pass_startup = pass_startup;
master->pub.finish_pass = finish_pass_master;
master->pub.is_last_pass = FALSE;
/* Validate parameters, determine derived values */
initial_setup(cinfo);
if (cinfo->scan_info != NULL) {
#ifdef C_MULTISCAN_FILES_SUPPORTED
validate_script(cinfo);
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif
} else {
cinfo->progressive_mode = FALSE;
cinfo->num_scans = 1;
}
if (cinfo->progressive_mode) /* TEMPORARY HACK ??? */
cinfo->optimize_coding = TRUE; /* assume default tables no good for progressive mode */
/* Initialize my private state */
if (transcode_only) {
/* no main pass in transcoding */
if (cinfo->optimize_coding)
master->pass_type = huff_opt_pass;
else
master->pass_type = output_pass;
} else {
/* for normal compression, first pass is always this type: */
master->pass_type = main_pass;
}
master->scan_number = 0;
master->pass_number = 0;
if (cinfo->optimize_coding)
master->total_passes = cinfo->num_scans * 2;
else
master->total_passes = cinfo->num_scans;
}

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@ -1,106 +0,0 @@
/*
* jcomapi.c
*
* Copyright (C) 1994-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains application interface routines that are used for both
* compression and decompression.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/*
* Abort processing of a JPEG compression or decompression operation,
* but don't destroy the object itself.
*
* For this, we merely clean up all the nonpermanent memory pools.
* Note that temp files (virtual arrays) are not allowed to belong to
* the permanent pool, so we will be able to close all temp files here.
* Closing a data source or destination, if necessary, is the application's
* responsibility.
*/
GLOBAL(void)
jpeg_abort (j_common_ptr cinfo)
{
int pool;
/* Do nothing if called on a not-initialized or destroyed JPEG object. */
if (cinfo->mem == NULL)
return;
/* Releasing pools in reverse order might help avoid fragmentation
* with some (brain-damaged) malloc libraries.
*/
for (pool = JPOOL_NUMPOOLS-1; pool > JPOOL_PERMANENT; pool--) {
(*cinfo->mem->free_pool) (cinfo, pool);
}
/* Reset overall state for possible reuse of object */
if (cinfo->is_decompressor) {
cinfo->global_state = DSTATE_START;
/* Try to keep application from accessing now-deleted marker list.
* A bit kludgy to do it here, but this is the most central place.
*/
((j_decompress_ptr) cinfo)->marker_list = NULL;
} else {
cinfo->global_state = CSTATE_START;
}
}
/*
* Destruction of a JPEG object.
*
* Everything gets deallocated except the master jpeg_compress_struct itself
* and the error manager struct. Both of these are supplied by the application
* and must be freed, if necessary, by the application. (Often they are on
* the stack and so don't need to be freed anyway.)
* Closing a data source or destination, if necessary, is the application's
* responsibility.
*/
GLOBAL(void)
jpeg_destroy (j_common_ptr cinfo)
{
/* We need only tell the memory manager to release everything. */
/* NB: mem pointer is NULL if memory mgr failed to initialize. */
if (cinfo->mem != NULL)
(*cinfo->mem->self_destruct) (cinfo);
cinfo->mem = NULL; /* be safe if jpeg_destroy is called twice */
cinfo->global_state = 0; /* mark it destroyed */
}
/*
* Convenience routines for allocating quantization and Huffman tables.
* (Would jutils.c be a more reasonable place to put these?)
*/
GLOBAL(JQUANT_TBL *)
jpeg_alloc_quant_table (j_common_ptr cinfo)
{
JQUANT_TBL *tbl;
tbl = (JQUANT_TBL *)
(*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JQUANT_TBL));
tbl->sent_table = FALSE; /* make sure this is false in any new table */
return tbl;
}
GLOBAL(JHUFF_TBL *)
jpeg_alloc_huff_table (j_common_ptr cinfo)
{
JHUFF_TBL *tbl;
tbl = (JHUFF_TBL *)
(*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JHUFF_TBL));
tbl->sent_table = FALSE; /* make sure this is false in any new table */
return tbl;
}

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src/3rdparty/src/jpeg-6b/jconfig.bcc vendored
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/* jconfig.bcc --- jconfig.h for Borland C (Turbo C) on MS-DOS or OS/2. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#ifdef __MSDOS__
#define NEED_FAR_POINTERS /* for small or medium memory model */
#endif
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN /* this assumes you have -w-stu in CFLAGS */
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#ifdef __MSDOS__
#define USE_MSDOS_MEMMGR /* Define this if you use jmemdos.c */
#define MAX_ALLOC_CHUNK 65520L /* Maximum request to malloc() */
#define USE_FMEM /* Borland has _fmemcpy() and _fmemset() */
#endif
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE
#define USE_SETMODE /* Borland has setmode() */
#ifdef __MSDOS__
#define NEED_SIGNAL_CATCHER /* Define this if you use jmemdos.c */
#endif
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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src/3rdparty/src/jpeg-6b/jconfig.cfg vendored
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/* jconfig.cfg --- source file edited by configure script */
/* see jconfig.doc for explanations */
#undef HAVE_PROTOTYPES
#undef HAVE_UNSIGNED_CHAR
#undef HAVE_UNSIGNED_SHORT
#undef void
#undef const
#undef CHAR_IS_UNSIGNED
#undef HAVE_STDDEF_H
#undef HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS
#undef NEED_SHORT_EXTERNAL_NAMES
/* Define this if you get warnings about undefined structures. */
#undef INCOMPLETE_TYPES_BROKEN
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#undef INLINE
/* These are for configuring the JPEG memory manager. */
#undef DEFAULT_MAX_MEM
#undef NO_MKTEMP
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#undef TWO_FILE_COMMANDLINE
#undef NEED_SIGNAL_CATCHER
#undef DONT_USE_B_MODE
/* Define this if you want percent-done progress reports from cjpeg/djpeg. */
#undef PROGRESS_REPORT
#endif /* JPEG_CJPEG_DJPEG */

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src/3rdparty/src/jpeg-6b/jconfig.dj vendored
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/* jconfig.dj --- jconfig.h for DJGPP (Delorie's GNU C port) on MS-DOS. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS /* DJGPP uses flat 32-bit addressing */
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#undef TWO_FILE_COMMANDLINE /* optional */
#define USE_SETMODE /* Needed to make one-file style work in DJGPP */
#undef NEED_SIGNAL_CATCHER /* Define this if you use jmemname.c */
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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src/3rdparty/src/jpeg-6b/jconfig.doc vendored
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/*
* jconfig.doc
*
* Copyright (C) 1991-1994, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file documents the configuration options that are required to
* customize the JPEG software for a particular system.
*
* The actual configuration options for a particular installation are stored
* in jconfig.h. On many machines, jconfig.h can be generated automatically
* or copied from one of the "canned" jconfig files that we supply. But if
* you need to generate a jconfig.h file by hand, this file tells you how.
*
* DO NOT EDIT THIS FILE --- IT WON'T ACCOMPLISH ANYTHING.
* EDIT A COPY NAMED JCONFIG.H.
*/
/*
* These symbols indicate the properties of your machine or compiler.
* #define the symbol if yes, #undef it if no.
*/
/* Does your compiler support function prototypes?
* (If not, you also need to use ansi2knr, see install.doc)
*/
#define HAVE_PROTOTYPES
/* Does your compiler support the declaration "unsigned char" ?
* How about "unsigned short" ?
*/
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* Define "void" as "char" if your compiler doesn't know about type void.
* NOTE: be sure to define void such that "void *" represents the most general
* pointer type, e.g., that returned by malloc().
*/
/* #define void char */
/* Define "const" as empty if your compiler doesn't know the "const" keyword.
*/
/* #define const */
/* Define this if an ordinary "char" type is unsigned.
* If you're not sure, leaving it undefined will work at some cost in speed.
* If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
*/
#undef CHAR_IS_UNSIGNED
/* Define this if your system has an ANSI-conforming <stddef.h> file.
*/
#define HAVE_STDDEF_H
/* Define this if your system has an ANSI-conforming <stdlib.h> file.
*/
#define HAVE_STDLIB_H
/* Define this if your system does not have an ANSI/SysV <string.h>,
* but does have a BSD-style <strings.h>.
*/
#undef NEED_BSD_STRINGS
/* Define this if your system does not provide typedef size_t in any of the
* ANSI-standard places (stddef.h, stdlib.h, or stdio.h), but places it in
* <sys/types.h> instead.
*/
#undef NEED_SYS_TYPES_H
/* For 80x86 machines, you need to define NEED_FAR_POINTERS,
* unless you are using a large-data memory model or 80386 flat-memory mode.
* On less brain-damaged CPUs this symbol must not be defined.
* (Defining this symbol causes large data structures to be referenced through
* "far" pointers and to be allocated with a special version of malloc.)
*/
#undef NEED_FAR_POINTERS
/* Define this if your linker needs global names to be unique in less
* than the first 15 characters.
*/
#undef NEED_SHORT_EXTERNAL_NAMES
/* Although a real ANSI C compiler can deal perfectly well with pointers to
* unspecified structures (see "incomplete types" in the spec), a few pre-ANSI
* and pseudo-ANSI compilers get confused. To keep one of these bozos happy,
* define INCOMPLETE_TYPES_BROKEN. This is not recommended unless you
* actually get "missing structure definition" warnings or errors while
* compiling the JPEG code.
*/
#undef INCOMPLETE_TYPES_BROKEN
/*
* The following options affect code selection within the JPEG library,
* but they don't need to be visible to applications using the library.
* To minimize application namespace pollution, the symbols won't be
* defined unless JPEG_INTERNALS has been defined.
*/
#ifdef JPEG_INTERNALS
/* Define this if your compiler implements ">>" on signed values as a logical
* (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
* which is the normal and rational definition.
*/
#undef RIGHT_SHIFT_IS_UNSIGNED
#endif /* JPEG_INTERNALS */
/*
* The remaining options do not affect the JPEG library proper,
* but only the sample applications cjpeg/djpeg (see cjpeg.c, djpeg.c).
* Other applications can ignore these.
*/
#ifdef JPEG_CJPEG_DJPEG
/* These defines indicate which image (non-JPEG) file formats are allowed. */
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
/* Define this if you want to name both input and output files on the command
* line, rather than using stdout and optionally stdin. You MUST do this if
* your system can't cope with binary I/O to stdin/stdout. See comments at
* head of cjpeg.c or djpeg.c.
*/
#undef TWO_FILE_COMMANDLINE
/* Define this if your system needs explicit cleanup of temporary files.
* This is crucial under MS-DOS, where the temporary "files" may be areas
* of extended memory; on most other systems it's not as important.
*/
#undef NEED_SIGNAL_CATCHER
/* By default, we open image files with fopen(...,"rb") or fopen(...,"wb").
* This is necessary on systems that distinguish text files from binary files,
* and is harmless on most systems that don't. If you have one of the rare
* systems that complains about the "b" spec, define this symbol.
*/
#undef DONT_USE_B_MODE
/* Define this if you want percent-done progress reports from cjpeg/djpeg.
*/
#undef PROGRESS_REPORT
#endif /* JPEG_CJPEG_DJPEG */

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src/3rdparty/src/jpeg-6b/jconfig.mac vendored
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@ -1,43 +0,0 @@
/* jconfig.mac --- jconfig.h for CodeWarrior on Apple Macintosh */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#define USE_MAC_MEMMGR /* Define this if you use jmemmac.c */
#define ALIGN_TYPE long /* Needed for 680x0 Macs */
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define USE_CCOMMAND /* Command line reader for Macintosh */
#define TWO_FILE_COMMANDLINE /* Binary I/O thru stdin/stdout doesn't work */
#undef NEED_SIGNAL_CATCHER
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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src/3rdparty/src/jpeg-6b/jconfig.manx vendored
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/* jconfig.manx --- jconfig.h for Amiga systems using Manx Aztec C ver 5.x. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#define TEMP_DIRECTORY "JPEGTMP:" /* recommended setting for Amiga */
#define SHORTxSHORT_32 /* produces better DCT code with Aztec C */
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE
#define NEED_SIGNAL_CATCHER
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#define signal_catcher _abort /* hack for Aztec C naming requirements */
#endif /* JPEG_CJPEG_DJPEG */

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src/3rdparty/src/jpeg-6b/jconfig.mc6 vendored
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/* jconfig.mc6 --- jconfig.h for Microsoft C on MS-DOS, version 6.00A & up. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#define NEED_FAR_POINTERS /* for small or medium memory model */
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#define USE_MSDOS_MEMMGR /* Define this if you use jmemdos.c */
#define MAX_ALLOC_CHUNK 65520L /* Maximum request to malloc() */
#define USE_FMEM /* Microsoft has _fmemcpy() and _fmemset() */
#define NEED_FHEAPMIN /* far heap management routines are broken */
#define SHORTxLCONST_32 /* enable compiler-specific DCT optimization */
/* Note: the above define is known to improve the code with Microsoft C 6.00A.
* I do not know whether it is good for later compiler versions.
* Please report any info on this point to jpeg-info@uunet.uu.net.
*/
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE
#define USE_SETMODE /* Microsoft has setmode() */
#define NEED_SIGNAL_CATCHER /* Define this if you use jmemdos.c */
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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src/3rdparty/src/jpeg-6b/jconfig.sas vendored
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/* jconfig.sas --- jconfig.h for Amiga systems using SAS C 6.0 and up. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#define TEMP_DIRECTORY "JPEGTMP:" /* recommended setting for Amiga */
#define NO_MKTEMP /* SAS C doesn't have mktemp() */
#define SHORTxSHORT_32 /* produces better DCT code with SAS C */
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE
#define NEED_SIGNAL_CATCHER
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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/* jconfig.st --- jconfig.h for Atari ST/STE/TT using Pure C or Turbo C. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS
#undef NEED_SHORT_EXTERNAL_NAMES
#define INCOMPLETE_TYPES_BROKEN /* suppress undefined-structure warnings */
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#define ALIGN_TYPE long /* apparently double is a weird size? */
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE /* optional -- undef if you like Unix style */
/* Note: if you undef TWO_FILE_COMMANDLINE, you may need to define
* USE_SETMODE. Some Atari compilers require it, some do not.
*/
#define NEED_SIGNAL_CATCHER /* needed if you use jmemname.c */
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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/* jconfig.vc --- jconfig.h for Microsoft Visual C++ on Windows 95 or NT. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS /* we presume a 32-bit flat memory model */
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
/* Define "boolean" as unsigned char, not int, per Windows custom */
#ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */
typedef unsigned char boolean;
#endif
#define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE /* optional */
#define USE_SETMODE /* Microsoft has setmode() */
#undef NEED_SIGNAL_CATCHER
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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/* jconfig.vms --- jconfig.h for use on Digital VMS. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE /* Needed on VMS */
#undef NEED_SIGNAL_CATCHER
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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/* jconfig.wat --- jconfig.h for Watcom C/C++ on MS-DOS or OS/2. */
/* see jconfig.doc for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#define CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS /* Watcom uses flat 32-bit addressing */
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#undef TWO_FILE_COMMANDLINE /* optional */
#define USE_SETMODE /* Needed to make one-file style work in Watcom */
#undef NEED_SIGNAL_CATCHER /* Define this if you use jmemname.c */
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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/*
* jcparam.c
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains optional default-setting code for the JPEG compressor.
* Applications do not have to use this file, but those that don't use it
* must know a lot more about the innards of the JPEG code.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/*
* Quantization table setup routines
*/
GLOBAL(void)
jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
const unsigned int *basic_table,
int scale_factor, boolean force_baseline)
/* Define a quantization table equal to the basic_table times
* a scale factor (given as a percentage).
* If force_baseline is TRUE, the computed quantization table entries
* are limited to 1..255 for JPEG baseline compatibility.
*/
{
JQUANT_TBL ** qtblptr;
int i;
long temp;
/* Safety check to ensure start_compress not called yet. */
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
if (which_tbl < 0 || which_tbl >= NUM_QUANT_TBLS)
ERREXIT1(cinfo, JERR_DQT_INDEX, which_tbl);
qtblptr = & cinfo->quant_tbl_ptrs[which_tbl];
if (*qtblptr == NULL)
*qtblptr = jpeg_alloc_quant_table((j_common_ptr) cinfo);
for (i = 0; i < DCTSIZE2; i++) {
temp = ((long) basic_table[i] * scale_factor + 50L) / 100L;
/* limit the values to the valid range */
if (temp <= 0L) temp = 1L;
if (temp > 32767L) temp = 32767L; /* max quantizer needed for 12 bits */
if (force_baseline && temp > 255L)
temp = 255L; /* limit to baseline range if requested */
(*qtblptr)->quantval[i] = (UINT16) temp;
}
/* Initialize sent_table FALSE so table will be written to JPEG file. */
(*qtblptr)->sent_table = FALSE;
}
GLOBAL(void)
jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
boolean force_baseline)
/* Set or change the 'quality' (quantization) setting, using default tables
* and a straight percentage-scaling quality scale. In most cases it's better
* to use jpeg_set_quality (below); this entry point is provided for
* applications that insist on a linear percentage scaling.
*/
{
/* These are the sample quantization tables given in JPEG spec section K.1.
* The spec says that the values given produce "good" quality, and
* when divided by 2, "very good" quality.
*/
static const unsigned int std_luminance_quant_tbl[DCTSIZE2] = {
16, 11, 10, 16, 24, 40, 51, 61,
12, 12, 14, 19, 26, 58, 60, 55,
14, 13, 16, 24, 40, 57, 69, 56,
14, 17, 22, 29, 51, 87, 80, 62,
18, 22, 37, 56, 68, 109, 103, 77,
24, 35, 55, 64, 81, 104, 113, 92,
49, 64, 78, 87, 103, 121, 120, 101,
72, 92, 95, 98, 112, 100, 103, 99
};
static const unsigned int std_chrominance_quant_tbl[DCTSIZE2] = {
17, 18, 24, 47, 99, 99, 99, 99,
18, 21, 26, 66, 99, 99, 99, 99,
24, 26, 56, 99, 99, 99, 99, 99,
47, 66, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99
};
/* Set up two quantization tables using the specified scaling */
jpeg_add_quant_table(cinfo, 0, std_luminance_quant_tbl,
scale_factor, force_baseline);
jpeg_add_quant_table(cinfo, 1, std_chrominance_quant_tbl,
scale_factor, force_baseline);
}
GLOBAL(int)
jpeg_quality_scaling (int quality)
/* Convert a user-specified quality rating to a percentage scaling factor
* for an underlying quantization table, using our recommended scaling curve.
* The input 'quality' factor should be 0 (terrible) to 100 (very good).
*/
{
/* Safety limit on quality factor. Convert 0 to 1 to avoid zero divide. */
if (quality <= 0) quality = 1;
if (quality > 100) quality = 100;
/* The basic table is used as-is (scaling 100) for a quality of 50.
* Qualities 50..100 are converted to scaling percentage 200 - 2*Q;
* note that at Q=100 the scaling is 0, which will cause jpeg_add_quant_table
* to make all the table entries 1 (hence, minimum quantization loss).
* Qualities 1..50 are converted to scaling percentage 5000/Q.
*/
if (quality < 50)
quality = 5000 / quality;
else
quality = 200 - quality*2;
return quality;
}
GLOBAL(void)
jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
/* Set or change the 'quality' (quantization) setting, using default tables.
* This is the standard quality-adjusting entry point for typical user
* interfaces; only those who want detailed control over quantization tables
* would use the preceding three routines directly.
*/
{
/* Convert user 0-100 rating to percentage scaling */
quality = jpeg_quality_scaling(quality);
/* Set up standard quality tables */
jpeg_set_linear_quality(cinfo, quality, force_baseline);
}
/*
* Huffman table setup routines
*/
LOCAL(void)
add_huff_table (j_compress_ptr cinfo,
JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val)
/* Define a Huffman table */
{
int nsymbols, len;
if (*htblptr == NULL)
*htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
/* Copy the number-of-symbols-of-each-code-length counts */
MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
/* Validate the counts. We do this here mainly so we can copy the right
* number of symbols from the val[] array, without risking marching off
* the end of memory. jchuff.c will do a more thorough test later.
*/
nsymbols = 0;
for (len = 1; len <= 16; len++)
nsymbols += bits[len];
if (nsymbols < 1 || nsymbols > 256)
ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
MEMCOPY((*htblptr)->huffval, val, nsymbols * SIZEOF(UINT8));
/* Initialize sent_table FALSE so table will be written to JPEG file. */
(*htblptr)->sent_table = FALSE;
}
LOCAL(void)
std_huff_tables (j_compress_ptr cinfo)
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
/* IMPORTANT: these are only valid for 8-bit data precision! */
{
static const UINT8 bits_dc_luminance[17] =
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
static const UINT8 val_dc_luminance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
static const UINT8 bits_dc_chrominance[17] =
{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
static const UINT8 val_dc_chrominance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
static const UINT8 bits_ac_luminance[17] =
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
static const UINT8 val_ac_luminance[] =
{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa };
static const UINT8 bits_ac_chrominance[17] =
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
static const UINT8 val_ac_chrominance[] =
{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa };
add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[0],
bits_dc_luminance, val_dc_luminance);
add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[0],
bits_ac_luminance, val_ac_luminance);
add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[1],
bits_dc_chrominance, val_dc_chrominance);
add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1],
bits_ac_chrominance, val_ac_chrominance);
}
/*
* Default parameter setup for compression.
*
* Applications that don't choose to use this routine must do their
* own setup of all these parameters. Alternately, you can call this
* to establish defaults and then alter parameters selectively. This
* is the recommended approach since, if we add any new parameters,
* your code will still work (they'll be set to reasonable defaults).
*/
GLOBAL(void)
jpeg_set_defaults (j_compress_ptr cinfo)
{
int i;
/* Safety check to ensure start_compress not called yet. */
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* Allocate comp_info array large enough for maximum component count.
* Array is made permanent in case application wants to compress
* multiple images at same param settings.
*/
if (cinfo->comp_info == NULL)
cinfo->comp_info = (jpeg_component_info *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
MAX_COMPONENTS * SIZEOF(jpeg_component_info));
/* Initialize everything not dependent on the color space */
cinfo->data_precision = BITS_IN_JSAMPLE;
/* Set up two quantization tables using default quality of 75 */
jpeg_set_quality(cinfo, 75, TRUE);
/* Set up two Huffman tables */
std_huff_tables(cinfo);
/* Initialize default arithmetic coding conditioning */
for (i = 0; i < NUM_ARITH_TBLS; i++) {
cinfo->arith_dc_L[i] = 0;
cinfo->arith_dc_U[i] = 1;
cinfo->arith_ac_K[i] = 5;
}
/* Default is no multiple-scan output */
cinfo->scan_info = NULL;
cinfo->num_scans = 0;
/* Expect normal source image, not raw downsampled data */
cinfo->raw_data_in = FALSE;
/* Use Huffman coding, not arithmetic coding, by default */
cinfo->arith_code = FALSE;
/* By default, don't do extra passes to optimize entropy coding */
cinfo->optimize_coding = FALSE;
/* The standard Huffman tables are only valid for 8-bit data precision.
* If the precision is higher, force optimization on so that usable
* tables will be computed. This test can be removed if default tables
* are supplied that are valid for the desired precision.
*/
if (cinfo->data_precision > 8)
cinfo->optimize_coding = TRUE;
/* By default, use the simpler non-cosited sampling alignment */
cinfo->CCIR601_sampling = FALSE;
/* No input smoothing */
cinfo->smoothing_factor = 0;
/* DCT algorithm preference */
cinfo->dct_method = JDCT_DEFAULT;
/* No restart markers */
cinfo->restart_interval = 0;
cinfo->restart_in_rows = 0;
/* Fill in default JFIF marker parameters. Note that whether the marker
* will actually be written is determined by jpeg_set_colorspace.
*
* By default, the library emits JFIF version code 1.01.
* An application that wants to emit JFIF 1.02 extension markers should set
* JFIF_minor_version to 2. We could probably get away with just defaulting
* to 1.02, but there may still be some decoders in use that will complain
* about that; saying 1.01 should minimize compatibility problems.
*/
cinfo->JFIF_major_version = 1; /* Default JFIF version = 1.01 */
cinfo->JFIF_minor_version = 1;
cinfo->density_unit = 0; /* Pixel size is unknown by default */
cinfo->X_density = 1; /* Pixel aspect ratio is square by default */
cinfo->Y_density = 1;
/* Choose JPEG colorspace based on input space, set defaults accordingly */
jpeg_default_colorspace(cinfo);
}
/*
* Select an appropriate JPEG colorspace for in_color_space.
*/
GLOBAL(void)
jpeg_default_colorspace (j_compress_ptr cinfo)
{
switch (cinfo->in_color_space) {
case JCS_GRAYSCALE:
jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
break;
case JCS_RGB:
jpeg_set_colorspace(cinfo, JCS_YCbCr);
break;
case JCS_YCbCr:
jpeg_set_colorspace(cinfo, JCS_YCbCr);
break;
case JCS_CMYK:
jpeg_set_colorspace(cinfo, JCS_CMYK); /* By default, no translation */
break;
case JCS_YCCK:
jpeg_set_colorspace(cinfo, JCS_YCCK);
break;
case JCS_UNKNOWN:
jpeg_set_colorspace(cinfo, JCS_UNKNOWN);
break;
default:
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
}
}
/*
* Set the JPEG colorspace, and choose colorspace-dependent default values.
*/
GLOBAL(void)
jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
{
jpeg_component_info * compptr;
int ci;
#define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \
(compptr = &cinfo->comp_info[index], \
compptr->component_id = (id), \
compptr->h_samp_factor = (hsamp), \
compptr->v_samp_factor = (vsamp), \
compptr->quant_tbl_no = (quant), \
compptr->dc_tbl_no = (dctbl), \
compptr->ac_tbl_no = (actbl) )
/* Safety check to ensure start_compress not called yet. */
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* For all colorspaces, we use Q and Huff tables 0 for luminance components,
* tables 1 for chrominance components.
*/
cinfo->jpeg_color_space = colorspace;
cinfo->write_JFIF_header = FALSE; /* No marker for non-JFIF colorspaces */
cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */
switch (colorspace) {
case JCS_GRAYSCALE:
cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
cinfo->num_components = 1;
/* JFIF specifies component ID 1 */
SET_COMP(0, 1, 1,1, 0, 0,0);
break;
case JCS_RGB:
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag RGB */
cinfo->num_components = 3;
SET_COMP(0, 0x52 /* 'R' */, 1,1, 0, 0,0);
SET_COMP(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0);
break;
case JCS_YCbCr:
cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
cinfo->num_components = 3;
/* JFIF specifies component IDs 1,2,3 */
/* We default to 2x2 subsamples of chrominance */
SET_COMP(0, 1, 2,2, 0, 0,0);
SET_COMP(1, 2, 1,1, 1, 1,1);
SET_COMP(2, 3, 1,1, 1, 1,1);
break;
case JCS_CMYK:
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */
cinfo->num_components = 4;
SET_COMP(0, 0x43 /* 'C' */, 1,1, 0, 0,0);
SET_COMP(1, 0x4D /* 'M' */, 1,1, 0, 0,0);
SET_COMP(2, 0x59 /* 'Y' */, 1,1, 0, 0,0);
SET_COMP(3, 0x4B /* 'K' */, 1,1, 0, 0,0);
break;
case JCS_YCCK:
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag YCCK */
cinfo->num_components = 4;
SET_COMP(0, 1, 2,2, 0, 0,0);
SET_COMP(1, 2, 1,1, 1, 1,1);
SET_COMP(2, 3, 1,1, 1, 1,1);
SET_COMP(3, 4, 2,2, 0, 0,0);
break;
case JCS_UNKNOWN:
cinfo->num_components = cinfo->input_components;
if (cinfo->num_components < 1 || cinfo->num_components > MAX_COMPONENTS)
ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
MAX_COMPONENTS);
for (ci = 0; ci < cinfo->num_components; ci++) {
SET_COMP(ci, ci, 1,1, 0, 0,0);
}
break;
default:
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
}
}
#ifdef C_PROGRESSIVE_SUPPORTED
LOCAL(jpeg_scan_info *)
fill_a_scan (jpeg_scan_info * scanptr, int ci,
int Ss, int Se, int Ah, int Al)
/* Support routine: generate one scan for specified component */
{
scanptr->comps_in_scan = 1;
scanptr->component_index[0] = ci;
scanptr->Ss = Ss;
scanptr->Se = Se;
scanptr->Ah = Ah;
scanptr->Al = Al;
scanptr++;
return scanptr;
}
LOCAL(jpeg_scan_info *)
fill_scans (jpeg_scan_info * scanptr, int ncomps,
int Ss, int Se, int Ah, int Al)
/* Support routine: generate one scan for each component */
{
int ci;
for (ci = 0; ci < ncomps; ci++) {
scanptr->comps_in_scan = 1;
scanptr->component_index[0] = ci;
scanptr->Ss = Ss;
scanptr->Se = Se;
scanptr->Ah = Ah;
scanptr->Al = Al;
scanptr++;
}
return scanptr;
}
LOCAL(jpeg_scan_info *)
fill_dc_scans (jpeg_scan_info * scanptr, int ncomps, int Ah, int Al)
/* Support routine: generate interleaved DC scan if possible, else N scans */
{
int ci;
if (ncomps <= MAX_COMPS_IN_SCAN) {
/* Single interleaved DC scan */
scanptr->comps_in_scan = ncomps;
for (ci = 0; ci < ncomps; ci++)
scanptr->component_index[ci] = ci;
scanptr->Ss = scanptr->Se = 0;
scanptr->Ah = Ah;
scanptr->Al = Al;
scanptr++;
} else {
/* Noninterleaved DC scan for each component */
scanptr = fill_scans(scanptr, ncomps, 0, 0, Ah, Al);
}
return scanptr;
}
/*
* Create a recommended progressive-JPEG script.
* cinfo->num_components and cinfo->jpeg_color_space must be correct.
*/
GLOBAL(void)
jpeg_simple_progression (j_compress_ptr cinfo)
{
int ncomps = cinfo->num_components;
int nscans;
jpeg_scan_info * scanptr;
/* Safety check to ensure start_compress not called yet. */
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* Figure space needed for script. Calculation must match code below! */
if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) {
/* Custom script for YCbCr color images. */
nscans = 10;
} else {
/* All-purpose script for other color spaces. */
if (ncomps > MAX_COMPS_IN_SCAN)
nscans = 6 * ncomps; /* 2 DC + 4 AC scans per component */
else
nscans = 2 + 4 * ncomps; /* 2 DC scans; 4 AC scans per component */
}
/* Allocate space for script.
* We need to put it in the permanent pool in case the application performs
* multiple compressions without changing the settings. To avoid a memory
* leak if jpeg_simple_progression is called repeatedly for the same JPEG
* object, we try to re-use previously allocated space, and we allocate
* enough space to handle YCbCr even if initially asked for grayscale.
*/
if (cinfo->script_space == NULL || cinfo->script_space_size < nscans) {
cinfo->script_space_size = MAX(nscans, 10);
cinfo->script_space = (jpeg_scan_info *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
cinfo->script_space_size * SIZEOF(jpeg_scan_info));
}
scanptr = cinfo->script_space;
cinfo->scan_info = scanptr;
cinfo->num_scans = nscans;
if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) {
/* Custom script for YCbCr color images. */
/* Initial DC scan */
scanptr = fill_dc_scans(scanptr, ncomps, 0, 1);
/* Initial AC scan: get some luma data out in a hurry */
scanptr = fill_a_scan(scanptr, 0, 1, 5, 0, 2);
/* Chroma data is too small to be worth expending many scans on */
scanptr = fill_a_scan(scanptr, 2, 1, 63, 0, 1);
scanptr = fill_a_scan(scanptr, 1, 1, 63, 0, 1);
/* Complete spectral selection for luma AC */
scanptr = fill_a_scan(scanptr, 0, 6, 63, 0, 2);
/* Refine next bit of luma AC */
scanptr = fill_a_scan(scanptr, 0, 1, 63, 2, 1);
/* Finish DC successive approximation */
scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
/* Finish AC successive approximation */
scanptr = fill_a_scan(scanptr, 2, 1, 63, 1, 0);
scanptr = fill_a_scan(scanptr, 1, 1, 63, 1, 0);
/* Luma bottom bit comes last since it's usually largest scan */
scanptr = fill_a_scan(scanptr, 0, 1, 63, 1, 0);
} else {
/* All-purpose script for other color spaces. */
/* Successive approximation first pass */
scanptr = fill_dc_scans(scanptr, ncomps, 0, 1);
scanptr = fill_scans(scanptr, ncomps, 1, 5, 0, 2);
scanptr = fill_scans(scanptr, ncomps, 6, 63, 0, 2);
/* Successive approximation second pass */
scanptr = fill_scans(scanptr, ncomps, 1, 63, 2, 1);
/* Successive approximation final pass */
scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
scanptr = fill_scans(scanptr, ncomps, 1, 63, 1, 0);
}
}
#endif /* C_PROGRESSIVE_SUPPORTED */

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src/3rdparty/src/jpeg-6b/jcphuff.c vendored
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@ -1,833 +0,0 @@
/*
* jcphuff.c
*
* Copyright (C) 1995-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains Huffman entropy encoding routines for progressive JPEG.
*
* We do not support output suspension in this module, since the library
* currently does not allow multiple-scan files to be written with output
* suspension.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
#include "jchuff.h" /* Declarations shared with jchuff.c */
#ifdef C_PROGRESSIVE_SUPPORTED
/* Expanded entropy encoder object for progressive Huffman encoding. */
typedef struct {
struct jpeg_entropy_encoder pub; /* public fields */
/* Mode flag: TRUE for optimization, FALSE for actual data output */
boolean gather_statistics;
/* Bit-level coding status.
* next_output_byte/free_in_buffer are local copies of cinfo->dest fields.
*/
JOCTET * next_output_byte; /* => next byte to write in buffer */
size_t free_in_buffer; /* # of byte spaces remaining in buffer */
INT32 put_buffer; /* current bit-accumulation buffer */
int put_bits; /* # of bits now in it */
j_compress_ptr cinfo; /* link to cinfo (needed for dump_buffer) */
/* Coding status for DC components */
int last_dc_val[MAX_COMPS_IN_SCAN]; /* last DC coef for each component */
/* Coding status for AC components */
int ac_tbl_no; /* the table number of the single component */
unsigned int EOBRUN; /* run length of EOBs */
unsigned int BE; /* # of buffered correction bits before MCU */
char * bit_buffer; /* buffer for correction bits (1 per char) */
/* packing correction bits tightly would save some space but cost time... */
unsigned int restarts_to_go; /* MCUs left in this restart interval */
int next_restart_num; /* next restart number to write (0-7) */
/* Pointers to derived tables (these workspaces have image lifespan).
* Since any one scan codes only DC or only AC, we only need one set
* of tables, not one for DC and one for AC.
*/
c_derived_tbl * derived_tbls[NUM_HUFF_TBLS];
/* Statistics tables for optimization; again, one set is enough */
long * count_ptrs[NUM_HUFF_TBLS];
} phuff_entropy_encoder;
typedef phuff_entropy_encoder * phuff_entropy_ptr;
/* MAX_CORR_BITS is the number of bits the AC refinement correction-bit
* buffer can hold. Larger sizes may slightly improve compression, but
* 1000 is already well into the realm of overkill.
* The minimum safe size is 64 bits.
*/
#define MAX_CORR_BITS 1000 /* Max # of correction bits I can buffer */
/* IRIGHT_SHIFT is like RIGHT_SHIFT, but works on int rather than INT32.
* We assume that int right shift is unsigned if INT32 right shift is,
* which should be safe.
*/
#ifdef RIGHT_SHIFT_IS_UNSIGNED
#define ISHIFT_TEMPS int ishift_temp;
#define IRIGHT_SHIFT(x,shft) \
((ishift_temp = (x)) < 0 ? \
(ishift_temp >> (shft)) | ((~0) << (16-(shft))) : \
(ishift_temp >> (shft)))
#else
#define ISHIFT_TEMPS
#define IRIGHT_SHIFT(x,shft) ((x) >> (shft))
#endif
/* Forward declarations */
METHODDEF(boolean) encode_mcu_DC_first JPP((j_compress_ptr cinfo,
JBLOCKROW *MCU_data));
METHODDEF(boolean) encode_mcu_AC_first JPP((j_compress_ptr cinfo,
JBLOCKROW *MCU_data));
METHODDEF(boolean) encode_mcu_DC_refine JPP((j_compress_ptr cinfo,
JBLOCKROW *MCU_data));
METHODDEF(boolean) encode_mcu_AC_refine JPP((j_compress_ptr cinfo,
JBLOCKROW *MCU_data));
METHODDEF(void) finish_pass_phuff JPP((j_compress_ptr cinfo));
METHODDEF(void) finish_pass_gather_phuff JPP((j_compress_ptr cinfo));
/*
* Initialize for a Huffman-compressed scan using progressive JPEG.
*/
METHODDEF(void)
start_pass_phuff (j_compress_ptr cinfo, boolean gather_statistics)
{
phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
boolean is_DC_band;
int ci, tbl;
jpeg_component_info * compptr;
entropy->cinfo = cinfo;
entropy->gather_statistics = gather_statistics;
is_DC_band = (cinfo->Ss == 0);
/* We assume jcmaster.c already validated the scan parameters. */
/* Select execution routines */
if (cinfo->Ah == 0) {
if (is_DC_band)
entropy->pub.encode_mcu = encode_mcu_DC_first;
else
entropy->pub.encode_mcu = encode_mcu_AC_first;
} else {
if (is_DC_band)
entropy->pub.encode_mcu = encode_mcu_DC_refine;
else {
entropy->pub.encode_mcu = encode_mcu_AC_refine;
/* AC refinement needs a correction bit buffer */
if (entropy->bit_buffer == NULL)
entropy->bit_buffer = (char *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
MAX_CORR_BITS * SIZEOF(char));
}
}
if (gather_statistics)
entropy->pub.finish_pass = finish_pass_gather_phuff;
else
entropy->pub.finish_pass = finish_pass_phuff;
/* Only DC coefficients may be interleaved, so cinfo->comps_in_scan = 1
* for AC coefficients.
*/
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
/* Initialize DC predictions to 0 */
entropy->last_dc_val[ci] = 0;
/* Get table index */
if (is_DC_band) {
if (cinfo->Ah != 0) /* DC refinement needs no table */
continue;
tbl = compptr->dc_tbl_no;
} else {
entropy->ac_tbl_no = tbl = compptr->ac_tbl_no;
}
if (gather_statistics) {
/* Check for invalid table index */
/* (make_c_derived_tbl does this in the other path) */
if (tbl < 0 || tbl >= NUM_HUFF_TBLS)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tbl);
/* Allocate and zero the statistics tables */
/* Note that jpeg_gen_optimal_table expects 257 entries in each table! */
if (entropy->count_ptrs[tbl] == NULL)
entropy->count_ptrs[tbl] = (long *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
257 * SIZEOF(long));
MEMZERO(entropy->count_ptrs[tbl], 257 * SIZEOF(long));
} else {
/* Compute derived values for Huffman table */
/* We may do this more than once for a table, but it's not expensive */
jpeg_make_c_derived_tbl(cinfo, is_DC_band, tbl,
& entropy->derived_tbls[tbl]);
}
}
/* Initialize AC stuff */
entropy->EOBRUN = 0;
entropy->BE = 0;
/* Initialize bit buffer to empty */
entropy->put_buffer = 0;
entropy->put_bits = 0;
/* Initialize restart stuff */
entropy->restarts_to_go = cinfo->restart_interval;
entropy->next_restart_num = 0;
}
/* Outputting bytes to the file.
* NB: these must be called only when actually outputting,
* that is, entropy->gather_statistics == FALSE.
*/
/* Emit a byte */
#define emit_byte(entropy,val) \
{ *(entropy)->next_output_byte++ = (JOCTET) (val); \
if (--(entropy)->free_in_buffer == 0) \
dump_buffer(entropy); }
LOCAL(void)
dump_buffer (phuff_entropy_ptr entropy)
/* Empty the output buffer; we do not support suspension in this module. */
{
struct jpeg_destination_mgr * dest = entropy->cinfo->dest;
if (! (*dest->empty_output_buffer) (entropy->cinfo))
ERREXIT(entropy->cinfo, JERR_CANT_SUSPEND);
/* After a successful buffer dump, must reset buffer pointers */
entropy->next_output_byte = dest->next_output_byte;
entropy->free_in_buffer = dest->free_in_buffer;
}
/* Outputting bits to the file */
/* Only the right 24 bits of put_buffer are used; the valid bits are
* left-justified in this part. At most 16 bits can be passed to emit_bits
* in one call, and we never retain more than 7 bits in put_buffer
* between calls, so 24 bits are sufficient.
*/
INLINE
LOCAL(void)
emit_bits (phuff_entropy_ptr entropy, unsigned int code, int size)
/* Emit some bits, unless we are in gather mode */
{
/* This routine is heavily used, so it's worth coding tightly. */
register INT32 put_buffer = (INT32) code;
register int put_bits = entropy->put_bits;
/* if size is 0, caller used an invalid Huffman table entry */
if (size == 0)
ERREXIT(entropy->cinfo, JERR_HUFF_MISSING_CODE);
if (entropy->gather_statistics)
return; /* do nothing if we're only getting stats */
put_buffer &= (((INT32) 1)<<size) - 1; /* mask off any extra bits in code */
put_bits += size; /* new number of bits in buffer */
put_buffer <<= 24 - put_bits; /* align incoming bits */
put_buffer |= entropy->put_buffer; /* and merge with old buffer contents */
while (put_bits >= 8) {
int c = (int) ((put_buffer >> 16) & 0xFF);
emit_byte(entropy, c);
if (c == 0xFF) { /* need to stuff a zero byte? */
emit_byte(entropy, 0);
}
put_buffer <<= 8;
put_bits -= 8;
}
entropy->put_buffer = put_buffer; /* update variables */
entropy->put_bits = put_bits;
}
LOCAL(void)
flush_bits (phuff_entropy_ptr entropy)
{
emit_bits(entropy, 0x7F, 7); /* fill any partial byte with ones */
entropy->put_buffer = 0; /* and reset bit-buffer to empty */
entropy->put_bits = 0;
}
/*
* Emit (or just count) a Huffman symbol.
*/
INLINE
LOCAL(void)
emit_symbol (phuff_entropy_ptr entropy, int tbl_no, int symbol)
{
if (entropy->gather_statistics)
entropy->count_ptrs[tbl_no][symbol]++;
else {
c_derived_tbl * tbl = entropy->derived_tbls[tbl_no];
emit_bits(entropy, tbl->ehufco[symbol], tbl->ehufsi[symbol]);
}
}
/*
* Emit bits from a correction bit buffer.
*/
LOCAL(void)
emit_buffered_bits (phuff_entropy_ptr entropy, char * bufstart,
unsigned int nbits)
{
if (entropy->gather_statistics)
return; /* no real work */
while (nbits > 0) {
emit_bits(entropy, (unsigned int) (*bufstart), 1);
bufstart++;
nbits--;
}
}
/*
* Emit any pending EOBRUN symbol.
*/
LOCAL(void)
emit_eobrun (phuff_entropy_ptr entropy)
{
register int temp, nbits;
if (entropy->EOBRUN > 0) { /* if there is any pending EOBRUN */
temp = entropy->EOBRUN;
nbits = 0;
while ((temp >>= 1))
nbits++;
/* safety check: shouldn't happen given limited correction-bit buffer */
if (nbits > 14)
ERREXIT(entropy->cinfo, JERR_HUFF_MISSING_CODE);
emit_symbol(entropy, entropy->ac_tbl_no, nbits << 4);
if (nbits)
emit_bits(entropy, entropy->EOBRUN, nbits);
entropy->EOBRUN = 0;
/* Emit any buffered correction bits */
emit_buffered_bits(entropy, entropy->bit_buffer, entropy->BE);
entropy->BE = 0;
}
}
/*
* Emit a restart marker & resynchronize predictions.
*/
LOCAL(void)
emit_restart (phuff_entropy_ptr entropy, int restart_num)
{
int ci;
emit_eobrun(entropy);
if (! entropy->gather_statistics) {
flush_bits(entropy);
emit_byte(entropy, 0xFF);
emit_byte(entropy, JPEG_RST0 + restart_num);
}
if (entropy->cinfo->Ss == 0) {
/* Re-initialize DC predictions to 0 */
for (ci = 0; ci < entropy->cinfo->comps_in_scan; ci++)
entropy->last_dc_val[ci] = 0;
} else {
/* Re-initialize all AC-related fields to 0 */
entropy->EOBRUN = 0;
entropy->BE = 0;
}
}
/*
* MCU encoding for DC initial scan (either spectral selection,
* or first pass of successive approximation).
*/
METHODDEF(boolean)
encode_mcu_DC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
{
phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
register int temp, temp2;
register int nbits;
int blkn, ci;
int Al = cinfo->Al;
JBLOCKROW block;
jpeg_component_info * compptr;
ISHIFT_TEMPS
entropy->next_output_byte = cinfo->dest->next_output_byte;
entropy->free_in_buffer = cinfo->dest->free_in_buffer;
/* Emit restart marker if needed */
if (cinfo->restart_interval)
if (entropy->restarts_to_go == 0)
emit_restart(entropy, entropy->next_restart_num);
/* Encode the MCU data blocks */
for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
block = MCU_data[blkn];
ci = cinfo->MCU_membership[blkn];
compptr = cinfo->cur_comp_info[ci];
/* Compute the DC value after the required point transform by Al.
* This is simply an arithmetic right shift.
*/
temp2 = IRIGHT_SHIFT((int) ((*block)[0]), Al);
/* DC differences are figured on the point-transformed values. */
temp = temp2 - entropy->last_dc_val[ci];
entropy->last_dc_val[ci] = temp2;
/* Encode the DC coefficient difference per section G.1.2.1 */
temp2 = temp;
if (temp < 0) {
temp = -temp; /* temp is abs value of input */
/* For a negative input, want temp2 = bitwise complement of abs(input) */
/* This code assumes we are on a two's complement machine */
temp2--;
}
/* Find the number of bits needed for the magnitude of the coefficient */
nbits = 0;
while (temp) {
nbits++;
temp >>= 1;
}
/* Check for out-of-range coefficient values.
* Since we're encoding a difference, the range limit is twice as much.
*/
if (nbits > MAX_COEF_BITS+1)
ERREXIT(cinfo, JERR_BAD_DCT_COEF);
/* Count/emit the Huffman-coded symbol for the number of bits */
emit_symbol(entropy, compptr->dc_tbl_no, nbits);
/* Emit that number of bits of the value, if positive, */
/* or the complement of its magnitude, if negative. */
if (nbits) /* emit_bits rejects calls with size 0 */
emit_bits(entropy, (unsigned int) temp2, nbits);
}
cinfo->dest->next_output_byte = entropy->next_output_byte;
cinfo->dest->free_in_buffer = entropy->free_in_buffer;
/* Update restart-interval state too */
if (cinfo->restart_interval) {
if (entropy->restarts_to_go == 0) {
entropy->restarts_to_go = cinfo->restart_interval;
entropy->next_restart_num++;
entropy->next_restart_num &= 7;
}
entropy->restarts_to_go--;
}
return TRUE;
}
/*
* MCU encoding for AC initial scan (either spectral selection,
* or first pass of successive approximation).
*/
METHODDEF(boolean)
encode_mcu_AC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
{
phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
register int temp, temp2;
register int nbits;
register int r, k;
int Se = cinfo->Se;
int Al = cinfo->Al;
JBLOCKROW block;
entropy->next_output_byte = cinfo->dest->next_output_byte;
entropy->free_in_buffer = cinfo->dest->free_in_buffer;
/* Emit restart marker if needed */
if (cinfo->restart_interval)
if (entropy->restarts_to_go == 0)
emit_restart(entropy, entropy->next_restart_num);
/* Encode the MCU data block */
block = MCU_data[0];
/* Encode the AC coefficients per section G.1.2.2, fig. G.3 */
r = 0; /* r = run length of zeros */
for (k = cinfo->Ss; k <= Se; k++) {
if ((temp = (*block)[jpeg_natural_order[k]]) == 0) {
r++;
continue;
}
/* We must apply the point transform by Al. For AC coefficients this
* is an integer division with rounding towards 0. To do this portably
* in C, we shift after obtaining the absolute value; so the code is
* interwoven with finding the abs value (temp) and output bits (temp2).
*/
if (temp < 0) {
temp = -temp; /* temp is abs value of input */
temp >>= Al; /* apply the point transform */
/* For a negative coef, want temp2 = bitwise complement of abs(coef) */
temp2 = ~temp;
} else {
temp >>= Al; /* apply the point transform */
temp2 = temp;
}
/* Watch out for case that nonzero coef is zero after point transform */
if (temp == 0) {
r++;
continue;
}
/* Emit any pending EOBRUN */
if (entropy->EOBRUN > 0)
emit_eobrun(entropy);
/* if run length > 15, must emit special run-length-16 codes (0xF0) */
while (r > 15) {
emit_symbol(entropy, entropy->ac_tbl_no, 0xF0);
r -= 16;
}
/* Find the number of bits needed for the magnitude of the coefficient */
nbits = 1; /* there must be at least one 1 bit */
while ((temp >>= 1))
nbits++;
/* Check for out-of-range coefficient values */
if (nbits > MAX_COEF_BITS)
ERREXIT(cinfo, JERR_BAD_DCT_COEF);
/* Count/emit Huffman symbol for run length / number of bits */
emit_symbol(entropy, entropy->ac_tbl_no, (r << 4) + nbits);
/* Emit that number of bits of the value, if positive, */
/* or the complement of its magnitude, if negative. */
emit_bits(entropy, (unsigned int) temp2, nbits);
r = 0; /* reset zero run length */
}
if (r > 0) { /* If there are trailing zeroes, */
entropy->EOBRUN++; /* count an EOB */
if (entropy->EOBRUN == 0x7FFF)
emit_eobrun(entropy); /* force it out to avoid overflow */
}
cinfo->dest->next_output_byte = entropy->next_output_byte;
cinfo->dest->free_in_buffer = entropy->free_in_buffer;
/* Update restart-interval state too */
if (cinfo->restart_interval) {
if (entropy->restarts_to_go == 0) {
entropy->restarts_to_go = cinfo->restart_interval;
entropy->next_restart_num++;
entropy->next_restart_num &= 7;
}
entropy->restarts_to_go--;
}
return TRUE;
}
/*
* MCU encoding for DC successive approximation refinement scan.
* Note: we assume such scans can be multi-component, although the spec
* is not very clear on the point.
*/
METHODDEF(boolean)
encode_mcu_DC_refine (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
{
phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
register int temp;
int blkn;
int Al = cinfo->Al;
JBLOCKROW block;
entropy->next_output_byte = cinfo->dest->next_output_byte;
entropy->free_in_buffer = cinfo->dest->free_in_buffer;
/* Emit restart marker if needed */
if (cinfo->restart_interval)
if (entropy->restarts_to_go == 0)
emit_restart(entropy, entropy->next_restart_num);
/* Encode the MCU data blocks */
for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
block = MCU_data[blkn];
/* We simply emit the Al'th bit of the DC coefficient value. */
temp = (*block)[0];
emit_bits(entropy, (unsigned int) (temp >> Al), 1);
}
cinfo->dest->next_output_byte = entropy->next_output_byte;
cinfo->dest->free_in_buffer = entropy->free_in_buffer;
/* Update restart-interval state too */
if (cinfo->restart_interval) {
if (entropy->restarts_to_go == 0) {
entropy->restarts_to_go = cinfo->restart_interval;
entropy->next_restart_num++;
entropy->next_restart_num &= 7;
}
entropy->restarts_to_go--;
}
return TRUE;
}
/*
* MCU encoding for AC successive approximation refinement scan.
*/
METHODDEF(boolean)
encode_mcu_AC_refine (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
{
phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
register int temp;
register int r, k;
int EOB;
char *BR_buffer;
unsigned int BR;
int Se = cinfo->Se;
int Al = cinfo->Al;
JBLOCKROW block;
int absvalues[DCTSIZE2];
entropy->next_output_byte = cinfo->dest->next_output_byte;
entropy->free_in_buffer = cinfo->dest->free_in_buffer;
/* Emit restart marker if needed */
if (cinfo->restart_interval)
if (entropy->restarts_to_go == 0)
emit_restart(entropy, entropy->next_restart_num);
/* Encode the MCU data block */
block = MCU_data[0];
/* It is convenient to make a pre-pass to determine the transformed
* coefficients' absolute values and the EOB position.
*/
EOB = 0;
for (k = cinfo->Ss; k <= Se; k++) {
temp = (*block)[jpeg_natural_order[k]];
/* We must apply the point transform by Al. For AC coefficients this
* is an integer division with rounding towards 0. To do this portably
* in C, we shift after obtaining the absolute value.
*/
if (temp < 0)
temp = -temp; /* temp is abs value of input */
temp >>= Al; /* apply the point transform */
absvalues[k] = temp; /* save abs value for main pass */
if (temp == 1)
EOB = k; /* EOB = index of last newly-nonzero coef */
}
/* Encode the AC coefficients per section G.1.2.3, fig. G.7 */
r = 0; /* r = run length of zeros */
BR = 0; /* BR = count of buffered bits added now */
BR_buffer = entropy->bit_buffer + entropy->BE; /* Append bits to buffer */
for (k = cinfo->Ss; k <= Se; k++) {
if ((temp = absvalues[k]) == 0) {
r++;
continue;
}
/* Emit any required ZRLs, but not if they can be folded into EOB */
while (r > 15 && k <= EOB) {
/* emit any pending EOBRUN and the BE correction bits */
emit_eobrun(entropy);
/* Emit ZRL */
emit_symbol(entropy, entropy->ac_tbl_no, 0xF0);
r -= 16;
/* Emit buffered correction bits that must be associated with ZRL */
emit_buffered_bits(entropy, BR_buffer, BR);
BR_buffer = entropy->bit_buffer; /* BE bits are gone now */
BR = 0;
}
/* If the coef was previously nonzero, it only needs a correction bit.
* NOTE: a straight translation of the spec's figure G.7 would suggest
* that we also need to test r > 15. But if r > 15, we can only get here
* if k > EOB, which implies that this coefficient is not 1.
*/
if (temp > 1) {
/* The correction bit is the next bit of the absolute value. */
BR_buffer[BR++] = (char) (temp & 1);
continue;
}
/* Emit any pending EOBRUN and the BE correction bits */
emit_eobrun(entropy);
/* Count/emit Huffman symbol for run length / number of bits */
emit_symbol(entropy, entropy->ac_tbl_no, (r << 4) + 1);
/* Emit output bit for newly-nonzero coef */
temp = ((*block)[jpeg_natural_order[k]] < 0) ? 0 : 1;
emit_bits(entropy, (unsigned int) temp, 1);
/* Emit buffered correction bits that must be associated with this code */
emit_buffered_bits(entropy, BR_buffer, BR);
BR_buffer = entropy->bit_buffer; /* BE bits are gone now */
BR = 0;
r = 0; /* reset zero run length */
}
if (r > 0 || BR > 0) { /* If there are trailing zeroes, */
entropy->EOBRUN++; /* count an EOB */
entropy->BE += BR; /* concat my correction bits to older ones */
/* We force out the EOB if we risk either:
* 1. overflow of the EOB counter;
* 2. overflow of the correction bit buffer during the next MCU.
*/
if (entropy->EOBRUN == 0x7FFF || entropy->BE > (MAX_CORR_BITS-DCTSIZE2+1))
emit_eobrun(entropy);
}
cinfo->dest->next_output_byte = entropy->next_output_byte;
cinfo->dest->free_in_buffer = entropy->free_in_buffer;
/* Update restart-interval state too */
if (cinfo->restart_interval) {
if (entropy->restarts_to_go == 0) {
entropy->restarts_to_go = cinfo->restart_interval;
entropy->next_restart_num++;
entropy->next_restart_num &= 7;
}
entropy->restarts_to_go--;
}
return TRUE;
}
/*
* Finish up at the end of a Huffman-compressed progressive scan.
*/
METHODDEF(void)
finish_pass_phuff (j_compress_ptr cinfo)
{
phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
entropy->next_output_byte = cinfo->dest->next_output_byte;
entropy->free_in_buffer = cinfo->dest->free_in_buffer;
/* Flush out any buffered data */
emit_eobrun(entropy);
flush_bits(entropy);
cinfo->dest->next_output_byte = entropy->next_output_byte;
cinfo->dest->free_in_buffer = entropy->free_in_buffer;
}
/*
* Finish up a statistics-gathering pass and create the new Huffman tables.
*/
METHODDEF(void)
finish_pass_gather_phuff (j_compress_ptr cinfo)
{
phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
boolean is_DC_band;
int ci, tbl;
jpeg_component_info * compptr;
JHUFF_TBL **htblptr;
boolean did[NUM_HUFF_TBLS];
/* Flush out buffered data (all we care about is counting the EOB symbol) */
emit_eobrun(entropy);
is_DC_band = (cinfo->Ss == 0);
/* It's important not to apply jpeg_gen_optimal_table more than once
* per table, because it clobbers the input frequency counts!
*/
MEMZERO(did, SIZEOF(did));
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
if (is_DC_band) {
if (cinfo->Ah != 0) /* DC refinement needs no table */
continue;
tbl = compptr->dc_tbl_no;
} else {
tbl = compptr->ac_tbl_no;
}
if (! did[tbl]) {
if (is_DC_band)
htblptr = & cinfo->dc_huff_tbl_ptrs[tbl];
else
htblptr = & cinfo->ac_huff_tbl_ptrs[tbl];
if (*htblptr == NULL)
*htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
jpeg_gen_optimal_table(cinfo, *htblptr, entropy->count_ptrs[tbl]);
did[tbl] = TRUE;
}
}
}
/*
* Module initialization routine for progressive Huffman entropy encoding.
*/
GLOBAL(void)
jinit_phuff_encoder (j_compress_ptr cinfo)
{
phuff_entropy_ptr entropy;
int i;
entropy = (phuff_entropy_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(phuff_entropy_encoder));
cinfo->entropy = (struct jpeg_entropy_encoder *) entropy;
entropy->pub.start_pass = start_pass_phuff;
/* Mark tables unallocated */
for (i = 0; i < NUM_HUFF_TBLS; i++) {
entropy->derived_tbls[i] = NULL;
entropy->count_ptrs[i] = NULL;
}
entropy->bit_buffer = NULL; /* needed only in AC refinement scan */
}
#endif /* C_PROGRESSIVE_SUPPORTED */

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/*
* jcprepct.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains the compression preprocessing controller.
* This controller manages the color conversion, downsampling,
* and edge expansion steps.
*
* Most of the complexity here is associated with buffering input rows
* as required by the downsampler. See the comments at the head of
* jcsample.c for the downsampler's needs.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/* At present, jcsample.c can request context rows only for smoothing.
* In the future, we might also need context rows for CCIR601 sampling
* or other more-complex downsampling procedures. The code to support
* context rows should be compiled only if needed.
*/
#ifdef INPUT_SMOOTHING_SUPPORTED
#define CONTEXT_ROWS_SUPPORTED
#endif
/*
* For the simple (no-context-row) case, we just need to buffer one
* row group's worth of pixels for the downsampling step. At the bottom of
* the image, we pad to a full row group by replicating the last pixel row.
* The downsampler's last output row is then replicated if needed to pad
* out to a full iMCU row.
*
* When providing context rows, we must buffer three row groups' worth of
* pixels. Three row groups are physically allocated, but the row pointer
* arrays are made five row groups high, with the extra pointers above and
* below "wrapping around" to point to the last and first real row groups.
* This allows the downsampler to access the proper context rows.
* At the top and bottom of the image, we create dummy context rows by
* copying the first or last real pixel row. This copying could be avoided
* by pointer hacking as is done in jdmainct.c, but it doesn't seem worth the
* trouble on the compression side.
*/
/* Private buffer controller object */
typedef struct {
struct jpeg_c_prep_controller pub; /* public fields */
/* Downsampling input buffer. This buffer holds color-converted data
* until we have enough to do a downsample step.
*/
JSAMPARRAY color_buf[MAX_COMPONENTS];
JDIMENSION rows_to_go; /* counts rows remaining in source image */
int next_buf_row; /* index of next row to store in color_buf */
#ifdef CONTEXT_ROWS_SUPPORTED /* only needed for context case */
int this_row_group; /* starting row index of group to process */
int next_buf_stop; /* downsample when we reach this index */
#endif
} my_prep_controller;
typedef my_prep_controller * my_prep_ptr;
/*
* Initialize for a processing pass.
*/
METHODDEF(void)
start_pass_prep (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
{
my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
if (pass_mode != JBUF_PASS_THRU)
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
/* Initialize total-height counter for detecting bottom of image */
prep->rows_to_go = cinfo->image_height;
/* Mark the conversion buffer empty */
prep->next_buf_row = 0;
#ifdef CONTEXT_ROWS_SUPPORTED
/* Preset additional state variables for context mode.
* These aren't used in non-context mode, so we needn't test which mode.
*/
prep->this_row_group = 0;
/* Set next_buf_stop to stop after two row groups have been read in. */
prep->next_buf_stop = 2 * cinfo->max_v_samp_factor;
#endif
}
/*
* Expand an image vertically from height input_rows to height output_rows,
* by duplicating the bottom row.
*/
LOCAL(void)
expand_bottom_edge (JSAMPARRAY image_data, JDIMENSION num_cols,
int input_rows, int output_rows)
{
register int row;
for (row = input_rows; row < output_rows; row++) {
jcopy_sample_rows(image_data, input_rows-1, image_data, row,
1, num_cols);
}
}
/*
* Process some data in the simple no-context case.
*
* Preprocessor output data is counted in "row groups". A row group
* is defined to be v_samp_factor sample rows of each component.
* Downsampling will produce this much data from each max_v_samp_factor
* input rows.
*/
METHODDEF(void)
pre_process_data (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
JDIMENSION in_rows_avail,
JSAMPIMAGE output_buf, JDIMENSION *out_row_group_ctr,
JDIMENSION out_row_groups_avail)
{
my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
int numrows, ci;
JDIMENSION inrows;
jpeg_component_info * compptr;
while (*in_row_ctr < in_rows_avail &&
*out_row_group_ctr < out_row_groups_avail) {
/* Do color conversion to fill the conversion buffer. */
inrows = in_rows_avail - *in_row_ctr;
numrows = cinfo->max_v_samp_factor - prep->next_buf_row;
numrows = (int) MIN((JDIMENSION) numrows, inrows);
(*cinfo->cconvert->color_convert) (cinfo, input_buf + *in_row_ctr,
prep->color_buf,
(JDIMENSION) prep->next_buf_row,
numrows);
*in_row_ctr += numrows;
prep->next_buf_row += numrows;
prep->rows_to_go -= numrows;
/* If at bottom of image, pad to fill the conversion buffer. */
if (prep->rows_to_go == 0 &&
prep->next_buf_row < cinfo->max_v_samp_factor) {
for (ci = 0; ci < cinfo->num_components; ci++) {
expand_bottom_edge(prep->color_buf[ci], cinfo->image_width,
prep->next_buf_row, cinfo->max_v_samp_factor);
}
prep->next_buf_row = cinfo->max_v_samp_factor;
}
/* If we've filled the conversion buffer, empty it. */
if (prep->next_buf_row == cinfo->max_v_samp_factor) {
(*cinfo->downsample->downsample) (cinfo,
prep->color_buf, (JDIMENSION) 0,
output_buf, *out_row_group_ctr);
prep->next_buf_row = 0;
(*out_row_group_ctr)++;
}
/* If at bottom of image, pad the output to a full iMCU height.
* Note we assume the caller is providing a one-iMCU-height output buffer!
*/
if (prep->rows_to_go == 0 &&
*out_row_group_ctr < out_row_groups_avail) {
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
expand_bottom_edge(output_buf[ci],
compptr->width_in_blocks * DCTSIZE,
(int) (*out_row_group_ctr * compptr->v_samp_factor),
(int) (out_row_groups_avail * compptr->v_samp_factor));
}
*out_row_group_ctr = out_row_groups_avail;
break; /* can exit outer loop without test */
}
}
}
#ifdef CONTEXT_ROWS_SUPPORTED
/*
* Process some data in the context case.
*/
METHODDEF(void)
pre_process_context (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
JDIMENSION in_rows_avail,
JSAMPIMAGE output_buf, JDIMENSION *out_row_group_ctr,
JDIMENSION out_row_groups_avail)
{
my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
int numrows, ci;
int buf_height = cinfo->max_v_samp_factor * 3;
JDIMENSION inrows;
while (*out_row_group_ctr < out_row_groups_avail) {
if (*in_row_ctr < in_rows_avail) {
/* Do color conversion to fill the conversion buffer. */
inrows = in_rows_avail - *in_row_ctr;
numrows = prep->next_buf_stop - prep->next_buf_row;
numrows = (int) MIN((JDIMENSION) numrows, inrows);
(*cinfo->cconvert->color_convert) (cinfo, input_buf + *in_row_ctr,
prep->color_buf,
(JDIMENSION) prep->next_buf_row,
numrows);
/* Pad at top of image, if first time through */
if (prep->rows_to_go == cinfo->image_height) {
for (ci = 0; ci < cinfo->num_components; ci++) {
int row;
for (row = 1; row <= cinfo->max_v_samp_factor; row++) {
jcopy_sample_rows(prep->color_buf[ci], 0,
prep->color_buf[ci], -row,
1, cinfo->image_width);
}
}
}
*in_row_ctr += numrows;
prep->next_buf_row += numrows;
prep->rows_to_go -= numrows;
} else {
/* Return for more data, unless we are at the bottom of the image. */
if (prep->rows_to_go != 0)
break;
/* When at bottom of image, pad to fill the conversion buffer. */
if (prep->next_buf_row < prep->next_buf_stop) {
for (ci = 0; ci < cinfo->num_components; ci++) {
expand_bottom_edge(prep->color_buf[ci], cinfo->image_width,
prep->next_buf_row, prep->next_buf_stop);
}
prep->next_buf_row = prep->next_buf_stop;
}
}
/* If we've gotten enough data, downsample a row group. */
if (prep->next_buf_row == prep->next_buf_stop) {
(*cinfo->downsample->downsample) (cinfo,
prep->color_buf,
(JDIMENSION) prep->this_row_group,
output_buf, *out_row_group_ctr);
(*out_row_group_ctr)++;
/* Advance pointers with wraparound as necessary. */
prep->this_row_group += cinfo->max_v_samp_factor;
if (prep->this_row_group >= buf_height)
prep->this_row_group = 0;
if (prep->next_buf_row >= buf_height)
prep->next_buf_row = 0;
prep->next_buf_stop = prep->next_buf_row + cinfo->max_v_samp_factor;
}
}
}
/*
* Create the wrapped-around downsampling input buffer needed for context mode.
*/
LOCAL(void)
create_context_buffer (j_compress_ptr cinfo)
{
my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
int rgroup_height = cinfo->max_v_samp_factor;
int ci, i;
jpeg_component_info * compptr;
JSAMPARRAY true_buffer, fake_buffer;
/* Grab enough space for fake row pointers for all the components;
* we need five row groups' worth of pointers for each component.
*/
fake_buffer = (JSAMPARRAY)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(cinfo->num_components * 5 * rgroup_height) *
SIZEOF(JSAMPROW));
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
/* Allocate the actual buffer space (3 row groups) for this component.
* We make the buffer wide enough to allow the downsampler to edge-expand
* horizontally within the buffer, if it so chooses.
*/
true_buffer = (*cinfo->mem->alloc_sarray)
((j_common_ptr) cinfo, JPOOL_IMAGE,
(JDIMENSION) (((long) compptr->width_in_blocks * DCTSIZE *
cinfo->max_h_samp_factor) / compptr->h_samp_factor),
(JDIMENSION) (3 * rgroup_height));
/* Copy true buffer row pointers into the middle of the fake row array */
MEMCOPY(fake_buffer + rgroup_height, true_buffer,
3 * rgroup_height * SIZEOF(JSAMPROW));
/* Fill in the above and below wraparound pointers */
for (i = 0; i < rgroup_height; i++) {
fake_buffer[i] = true_buffer[2 * rgroup_height + i];
fake_buffer[4 * rgroup_height + i] = true_buffer[i];
}
prep->color_buf[ci] = fake_buffer + rgroup_height;
fake_buffer += 5 * rgroup_height; /* point to space for next component */
}
}
#endif /* CONTEXT_ROWS_SUPPORTED */
/*
* Initialize preprocessing controller.
*/
GLOBAL(void)
jinit_c_prep_controller (j_compress_ptr cinfo, boolean need_full_buffer)
{
my_prep_ptr prep;
int ci;
jpeg_component_info * compptr;
if (need_full_buffer) /* safety check */
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
prep = (my_prep_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_prep_controller));
cinfo->prep = (struct jpeg_c_prep_controller *) prep;
prep->pub.start_pass = start_pass_prep;
/* Allocate the color conversion buffer.
* We make the buffer wide enough to allow the downsampler to edge-expand
* horizontally within the buffer, if it so chooses.
*/
if (cinfo->downsample->need_context_rows) {
/* Set up to provide context rows */
#ifdef CONTEXT_ROWS_SUPPORTED
prep->pub.pre_process_data = pre_process_context;
create_context_buffer(cinfo);
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif
} else {
/* No context, just make it tall enough for one row group */
prep->pub.pre_process_data = pre_process_data;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
prep->color_buf[ci] = (*cinfo->mem->alloc_sarray)
((j_common_ptr) cinfo, JPOOL_IMAGE,
(JDIMENSION) (((long) compptr->width_in_blocks * DCTSIZE *
cinfo->max_h_samp_factor) / compptr->h_samp_factor),
(JDIMENSION) cinfo->max_v_samp_factor);
}
}
}

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/*
* jcsample.c
*
* Copyright (C) 1991-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains downsampling routines.
*
* Downsampling input data is counted in "row groups". A row group
* is defined to be max_v_samp_factor pixel rows of each component,
* from which the downsampler produces v_samp_factor sample rows.
* A single row group is processed in each call to the downsampler module.
*
* The downsampler is responsible for edge-expansion of its output data
* to fill an integral number of DCT blocks horizontally. The source buffer
* may be modified if it is helpful for this purpose (the source buffer is
* allocated wide enough to correspond to the desired output width).
* The caller (the prep controller) is responsible for vertical padding.
*
* The downsampler may request "context rows" by setting need_context_rows
* during startup. In this case, the input arrays will contain at least
* one row group's worth of pixels above and below the passed-in data;
* the caller will create dummy rows at image top and bottom by replicating
* the first or last real pixel row.
*
* An excellent reference for image resampling is
* Digital Image Warping, George Wolberg, 1990.
* Pub. by IEEE Computer Society Press, Los Alamitos, CA. ISBN 0-8186-8944-7.
*
* The downsampling algorithm used here is a simple average of the source
* pixels covered by the output pixel. The hi-falutin sampling literature
* refers to this as a "box filter". In general the characteristics of a box
* filter are not very good, but for the specific cases we normally use (1:1
* and 2:1 ratios) the box is equivalent to a "triangle filter" which is not
* nearly so bad. If you intend to use other sampling ratios, you'd be well
* advised to improve this code.
*
* A simple input-smoothing capability is provided. This is mainly intended
* for cleaning up color-dithered GIF input files (if you find it inadequate,
* we suggest using an external filtering program such as pnmconvol). When
* enabled, each input pixel P is replaced by a weighted sum of itself and its
* eight neighbors. P's weight is 1-8*SF and each neighbor's weight is SF,
* where SF = (smoothing_factor / 1024).
* Currently, smoothing is only supported for 2h2v sampling factors.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/* Pointer to routine to downsample a single component */
typedef JMETHOD(void, downsample1_ptr,
(j_compress_ptr cinfo, jpeg_component_info * compptr,
JSAMPARRAY input_data, JSAMPARRAY output_data));
/* Private subobject */
typedef struct {
struct jpeg_downsampler pub; /* public fields */
/* Downsampling method pointers, one per component */
downsample1_ptr methods[MAX_COMPONENTS];
} my_downsampler;
typedef my_downsampler * my_downsample_ptr;
/*
* Initialize for a downsampling pass.
*/
METHODDEF(void)
start_pass_downsample (j_compress_ptr cinfo)
{
/* no work for now */
}
/*
* Expand a component horizontally from width input_cols to width output_cols,
* by duplicating the rightmost samples.
*/
LOCAL(void)
expand_right_edge (JSAMPARRAY image_data, int num_rows,
JDIMENSION input_cols, JDIMENSION output_cols)
{
register JSAMPROW ptr;
register JSAMPLE pixval;
register int count;
int row;
int numcols = (int) (output_cols - input_cols);
if (numcols > 0) {
for (row = 0; row < num_rows; row++) {
ptr = image_data[row] + input_cols;
pixval = ptr[-1]; /* don't need GETJSAMPLE() here */
for (count = numcols; count > 0; count--)
*ptr++ = pixval;
}
}
}
/*
* Do downsampling for a whole row group (all components).
*
* In this version we simply downsample each component independently.
*/
METHODDEF(void)
sep_downsample (j_compress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION in_row_index,
JSAMPIMAGE output_buf, JDIMENSION out_row_group_index)
{
my_downsample_ptr downsample = (my_downsample_ptr) cinfo->downsample;
int ci;
jpeg_component_info * compptr;
JSAMPARRAY in_ptr, out_ptr;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
in_ptr = input_buf[ci] + in_row_index;
out_ptr = output_buf[ci] + (out_row_group_index * compptr->v_samp_factor);
(*downsample->methods[ci]) (cinfo, compptr, in_ptr, out_ptr);
}
}
/*
* Downsample pixel values of a single component.
* One row group is processed per call.
* This version handles arbitrary integral sampling ratios, without smoothing.
* Note that this version is not actually used for customary sampling ratios.
*/
METHODDEF(void)
int_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
JSAMPARRAY input_data, JSAMPARRAY output_data)
{
int inrow, outrow, h_expand, v_expand, numpix, numpix2, h, v;
JDIMENSION outcol, outcol_h; /* outcol_h == outcol*h_expand */
JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
JSAMPROW inptr, outptr;
INT32 outvalue;
h_expand = cinfo->max_h_samp_factor / compptr->h_samp_factor;
v_expand = cinfo->max_v_samp_factor / compptr->v_samp_factor;
numpix = h_expand * v_expand;
numpix2 = numpix/2;
/* Expand input data enough to let all the output samples be generated
* by the standard loop. Special-casing padded output would be more
* efficient.
*/
expand_right_edge(input_data, cinfo->max_v_samp_factor,
cinfo->image_width, output_cols * h_expand);
inrow = 0;
for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
outptr = output_data[outrow];
for (outcol = 0, outcol_h = 0; outcol < output_cols;
outcol++, outcol_h += h_expand) {
outvalue = 0;
for (v = 0; v < v_expand; v++) {
inptr = input_data[inrow+v] + outcol_h;
for (h = 0; h < h_expand; h++) {
outvalue += (INT32) GETJSAMPLE(*inptr++);
}
}
*outptr++ = (JSAMPLE) ((outvalue + numpix2) / numpix);
}
inrow += v_expand;
}
}
/*
* Downsample pixel values of a single component.
* This version handles the special case of a full-size component,
* without smoothing.
*/
METHODDEF(void)
fullsize_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
JSAMPARRAY input_data, JSAMPARRAY output_data)
{
/* Copy the data */
jcopy_sample_rows(input_data, 0, output_data, 0,
cinfo->max_v_samp_factor, cinfo->image_width);
/* Edge-expand */
expand_right_edge(output_data, cinfo->max_v_samp_factor,
cinfo->image_width, compptr->width_in_blocks * DCTSIZE);
}
/*
* Downsample pixel values of a single component.
* This version handles the common case of 2:1 horizontal and 1:1 vertical,
* without smoothing.
*
* A note about the "bias" calculations: when rounding fractional values to
* integer, we do not want to always round 0.5 up to the next integer.
* If we did that, we'd introduce a noticeable bias towards larger values.
* Instead, this code is arranged so that 0.5 will be rounded up or down at
* alternate pixel locations (a simple ordered dither pattern).
*/
METHODDEF(void)
h2v1_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
JSAMPARRAY input_data, JSAMPARRAY output_data)
{
int outrow;
JDIMENSION outcol;
JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
register JSAMPROW inptr, outptr;
register int bias;
/* Expand input data enough to let all the output samples be generated
* by the standard loop. Special-casing padded output would be more
* efficient.
*/
expand_right_edge(input_data, cinfo->max_v_samp_factor,
cinfo->image_width, output_cols * 2);
for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
outptr = output_data[outrow];
inptr = input_data[outrow];
bias = 0; /* bias = 0,1,0,1,... for successive samples */
for (outcol = 0; outcol < output_cols; outcol++) {
*outptr++ = (JSAMPLE) ((GETJSAMPLE(*inptr) + GETJSAMPLE(inptr[1])
+ bias) >> 1);
bias ^= 1; /* 0=>1, 1=>0 */
inptr += 2;
}
}
}
/*
* Downsample pixel values of a single component.
* This version handles the standard case of 2:1 horizontal and 2:1 vertical,
* without smoothing.
*/
METHODDEF(void)
h2v2_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
JSAMPARRAY input_data, JSAMPARRAY output_data)
{
int inrow, outrow;
JDIMENSION outcol;
JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
register JSAMPROW inptr0, inptr1, outptr;
register int bias;
/* Expand input data enough to let all the output samples be generated
* by the standard loop. Special-casing padded output would be more
* efficient.
*/
expand_right_edge(input_data, cinfo->max_v_samp_factor,
cinfo->image_width, output_cols * 2);
inrow = 0;
for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
outptr = output_data[outrow];
inptr0 = input_data[inrow];
inptr1 = input_data[inrow+1];
bias = 1; /* bias = 1,2,1,2,... for successive samples */
for (outcol = 0; outcol < output_cols; outcol++) {
*outptr++ = (JSAMPLE) ((GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[1]) +
GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[1])
+ bias) >> 2);
bias ^= 3; /* 1=>2, 2=>1 */
inptr0 += 2; inptr1 += 2;
}
inrow += 2;
}
}
#ifdef INPUT_SMOOTHING_SUPPORTED
/*
* Downsample pixel values of a single component.
* This version handles the standard case of 2:1 horizontal and 2:1 vertical,
* with smoothing. One row of context is required.
*/
METHODDEF(void)
h2v2_smooth_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
JSAMPARRAY input_data, JSAMPARRAY output_data)
{
int inrow, outrow;
JDIMENSION colctr;
JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
register JSAMPROW inptr0, inptr1, above_ptr, below_ptr, outptr;
INT32 membersum, neighsum, memberscale, neighscale;
/* Expand input data enough to let all the output samples be generated
* by the standard loop. Special-casing padded output would be more
* efficient.
*/
expand_right_edge(input_data - 1, cinfo->max_v_samp_factor + 2,
cinfo->image_width, output_cols * 2);
/* We don't bother to form the individual "smoothed" input pixel values;
* we can directly compute the output which is the average of the four
* smoothed values. Each of the four member pixels contributes a fraction
* (1-8*SF) to its own smoothed image and a fraction SF to each of the three
* other smoothed pixels, therefore a total fraction (1-5*SF)/4 to the final
* output. The four corner-adjacent neighbor pixels contribute a fraction
* SF to just one smoothed pixel, or SF/4 to the final output; while the
* eight edge-adjacent neighbors contribute SF to each of two smoothed
* pixels, or SF/2 overall. In order to use integer arithmetic, these
* factors are scaled by 2^16 = 65536.
* Also recall that SF = smoothing_factor / 1024.
*/
memberscale = 16384 - cinfo->smoothing_factor * 80; /* scaled (1-5*SF)/4 */
neighscale = cinfo->smoothing_factor * 16; /* scaled SF/4 */
inrow = 0;
for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
outptr = output_data[outrow];
inptr0 = input_data[inrow];
inptr1 = input_data[inrow+1];
above_ptr = input_data[inrow-1];
below_ptr = input_data[inrow+2];
/* Special case for first column: pretend column -1 is same as column 0 */
membersum = GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[1]) +
GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[1]);
neighsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(above_ptr[1]) +
GETJSAMPLE(*below_ptr) + GETJSAMPLE(below_ptr[1]) +
GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[2]) +
GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[2]);
neighsum += neighsum;
neighsum += GETJSAMPLE(*above_ptr) + GETJSAMPLE(above_ptr[2]) +
GETJSAMPLE(*below_ptr) + GETJSAMPLE(below_ptr[2]);
membersum = membersum * memberscale + neighsum * neighscale;
*outptr++ = (JSAMPLE) ((membersum + 32768) >> 16);
inptr0 += 2; inptr1 += 2; above_ptr += 2; below_ptr += 2;
for (colctr = output_cols - 2; colctr > 0; colctr--) {
/* sum of pixels directly mapped to this output element */
membersum = GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[1]) +
GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[1]);
/* sum of edge-neighbor pixels */
neighsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(above_ptr[1]) +
GETJSAMPLE(*below_ptr) + GETJSAMPLE(below_ptr[1]) +
GETJSAMPLE(inptr0[-1]) + GETJSAMPLE(inptr0[2]) +
GETJSAMPLE(inptr1[-1]) + GETJSAMPLE(inptr1[2]);
/* The edge-neighbors count twice as much as corner-neighbors */
neighsum += neighsum;
/* Add in the corner-neighbors */
neighsum += GETJSAMPLE(above_ptr[-1]) + GETJSAMPLE(above_ptr[2]) +
GETJSAMPLE(below_ptr[-1]) + GETJSAMPLE(below_ptr[2]);
/* form final output scaled up by 2^16 */
membersum = membersum * memberscale + neighsum * neighscale;
/* round, descale and output it */
*outptr++ = (JSAMPLE) ((membersum + 32768) >> 16);
inptr0 += 2; inptr1 += 2; above_ptr += 2; below_ptr += 2;
}
/* Special case for last column */
membersum = GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[1]) +
GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[1]);
neighsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(above_ptr[1]) +
GETJSAMPLE(*below_ptr) + GETJSAMPLE(below_ptr[1]) +
GETJSAMPLE(inptr0[-1]) + GETJSAMPLE(inptr0[1]) +
GETJSAMPLE(inptr1[-1]) + GETJSAMPLE(inptr1[1]);
neighsum += neighsum;
neighsum += GETJSAMPLE(above_ptr[-1]) + GETJSAMPLE(above_ptr[1]) +
GETJSAMPLE(below_ptr[-1]) + GETJSAMPLE(below_ptr[1]);
membersum = membersum * memberscale + neighsum * neighscale;
*outptr = (JSAMPLE) ((membersum + 32768) >> 16);
inrow += 2;
}
}
/*
* Downsample pixel values of a single component.
* This version handles the special case of a full-size component,
* with smoothing. One row of context is required.
*/
METHODDEF(void)
fullsize_smooth_downsample (j_compress_ptr cinfo, jpeg_component_info *compptr,
JSAMPARRAY input_data, JSAMPARRAY output_data)
{
int outrow;
JDIMENSION colctr;
JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
register JSAMPROW inptr, above_ptr, below_ptr, outptr;
INT32 membersum, neighsum, memberscale, neighscale;
int colsum, lastcolsum, nextcolsum;
/* Expand input data enough to let all the output samples be generated
* by the standard loop. Special-casing padded output would be more
* efficient.
*/
expand_right_edge(input_data - 1, cinfo->max_v_samp_factor + 2,
cinfo->image_width, output_cols);
/* Each of the eight neighbor pixels contributes a fraction SF to the
* smoothed pixel, while the main pixel contributes (1-8*SF). In order
* to use integer arithmetic, these factors are multiplied by 2^16 = 65536.
* Also recall that SF = smoothing_factor / 1024.
*/
memberscale = 65536L - cinfo->smoothing_factor * 512L; /* scaled 1-8*SF */
neighscale = cinfo->smoothing_factor * 64; /* scaled SF */
for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
outptr = output_data[outrow];
inptr = input_data[outrow];
above_ptr = input_data[outrow-1];
below_ptr = input_data[outrow+1];
/* Special case for first column */
colsum = GETJSAMPLE(*above_ptr++) + GETJSAMPLE(*below_ptr++) +
GETJSAMPLE(*inptr);
membersum = GETJSAMPLE(*inptr++);
nextcolsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(*below_ptr) +
GETJSAMPLE(*inptr);
neighsum = colsum + (colsum - membersum) + nextcolsum;
membersum = membersum * memberscale + neighsum * neighscale;
*outptr++ = (JSAMPLE) ((membersum + 32768) >> 16);
lastcolsum = colsum; colsum = nextcolsum;
for (colctr = output_cols - 2; colctr > 0; colctr--) {
membersum = GETJSAMPLE(*inptr++);
above_ptr++; below_ptr++;
nextcolsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(*below_ptr) +
GETJSAMPLE(*inptr);
neighsum = lastcolsum + (colsum - membersum) + nextcolsum;
membersum = membersum * memberscale + neighsum * neighscale;
*outptr++ = (JSAMPLE) ((membersum + 32768) >> 16);
lastcolsum = colsum; colsum = nextcolsum;
}
/* Special case for last column */
membersum = GETJSAMPLE(*inptr);
neighsum = lastcolsum + (colsum - membersum) + colsum;
membersum = membersum * memberscale + neighsum * neighscale;
*outptr = (JSAMPLE) ((membersum + 32768) >> 16);
}
}
#endif /* INPUT_SMOOTHING_SUPPORTED */
/*
* Module initialization routine for downsampling.
* Note that we must select a routine for each component.
*/
GLOBAL(void)
jinit_downsampler (j_compress_ptr cinfo)
{
my_downsample_ptr downsample;
int ci;
jpeg_component_info * compptr;
boolean smoothok = TRUE;
downsample = (my_downsample_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_downsampler));
cinfo->downsample = (struct jpeg_downsampler *) downsample;
downsample->pub.start_pass = start_pass_downsample;
downsample->pub.downsample = sep_downsample;
downsample->pub.need_context_rows = FALSE;
if (cinfo->CCIR601_sampling)
ERREXIT(cinfo, JERR_CCIR601_NOTIMPL);
/* Verify we can handle the sampling factors, and set up method pointers */
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
if (compptr->h_samp_factor == cinfo->max_h_samp_factor &&
compptr->v_samp_factor == cinfo->max_v_samp_factor) {
#ifdef INPUT_SMOOTHING_SUPPORTED
if (cinfo->smoothing_factor) {
downsample->methods[ci] = fullsize_smooth_downsample;
downsample->pub.need_context_rows = TRUE;
} else
#endif
downsample->methods[ci] = fullsize_downsample;
} else if (compptr->h_samp_factor * 2 == cinfo->max_h_samp_factor &&
compptr->v_samp_factor == cinfo->max_v_samp_factor) {
smoothok = FALSE;
downsample->methods[ci] = h2v1_downsample;
} else if (compptr->h_samp_factor * 2 == cinfo->max_h_samp_factor &&
compptr->v_samp_factor * 2 == cinfo->max_v_samp_factor) {
#ifdef INPUT_SMOOTHING_SUPPORTED
if (cinfo->smoothing_factor) {
downsample->methods[ci] = h2v2_smooth_downsample;
downsample->pub.need_context_rows = TRUE;
} else
#endif
downsample->methods[ci] = h2v2_downsample;
} else if ((cinfo->max_h_samp_factor % compptr->h_samp_factor) == 0 &&
(cinfo->max_v_samp_factor % compptr->v_samp_factor) == 0) {
smoothok = FALSE;
downsample->methods[ci] = int_downsample;
} else
ERREXIT(cinfo, JERR_FRACT_SAMPLE_NOTIMPL);
}
#ifdef INPUT_SMOOTHING_SUPPORTED
if (cinfo->smoothing_factor && !smoothok)
TRACEMS(cinfo, 0, JTRC_SMOOTH_NOTIMPL);
#endif
}

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src/3rdparty/src/jpeg-6b/jctrans.c vendored
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@ -1,388 +0,0 @@
/*
* jctrans.c
*
* Copyright (C) 1995-1998, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains library routines for transcoding compression,
* that is, writing raw DCT coefficient arrays to an output JPEG file.
* The routines in jcapimin.c will also be needed by a transcoder.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/* Forward declarations */
LOCAL(void) transencode_master_selection
JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
LOCAL(void) transencode_coef_controller
JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
/*
* Compression initialization for writing raw-coefficient data.
* Before calling this, all parameters and a data destination must be set up.
* Call jpeg_finish_compress() to actually write the data.
*
* The number of passed virtual arrays must match cinfo->num_components.
* Note that the virtual arrays need not be filled or even realized at
* the time write_coefficients is called; indeed, if the virtual arrays
* were requested from this compression object's memory manager, they
* typically will be realized during this routine and filled afterwards.
*/
GLOBAL(void)
jpeg_write_coefficients (j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays)
{
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* Mark all tables to be written */
jpeg_suppress_tables(cinfo, FALSE);
/* (Re)initialize error mgr and destination modules */
(*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
(*cinfo->dest->init_destination) (cinfo);
/* Perform master selection of active modules */
transencode_master_selection(cinfo, coef_arrays);
/* Wait for jpeg_finish_compress() call */
cinfo->next_scanline = 0; /* so jpeg_write_marker works */
cinfo->global_state = CSTATE_WRCOEFS;
}
/*
* Initialize the compression object with default parameters,
* then copy from the source object all parameters needed for lossless
* transcoding. Parameters that can be varied without loss (such as
* scan script and Huffman optimization) are left in their default states.
*/
GLOBAL(void)
jpeg_copy_critical_parameters (j_decompress_ptr srcinfo,
j_compress_ptr dstinfo)
{
JQUANT_TBL ** qtblptr;
jpeg_component_info *incomp, *outcomp;
JQUANT_TBL *c_quant, *slot_quant;
int tblno, ci, coefi;
/* Safety check to ensure start_compress not called yet. */
if (dstinfo->global_state != CSTATE_START)
ERREXIT1(dstinfo, JERR_BAD_STATE, dstinfo->global_state);
/* Copy fundamental image dimensions */
dstinfo->image_width = srcinfo->image_width;
dstinfo->image_height = srcinfo->image_height;
dstinfo->input_components = srcinfo->num_components;
dstinfo->in_color_space = srcinfo->jpeg_color_space;
/* Initialize all parameters to default values */
jpeg_set_defaults(dstinfo);
/* jpeg_set_defaults may choose wrong colorspace, eg YCbCr if input is RGB.
* Fix it to get the right header markers for the image colorspace.
*/
jpeg_set_colorspace(dstinfo, srcinfo->jpeg_color_space);
dstinfo->data_precision = srcinfo->data_precision;
dstinfo->CCIR601_sampling = srcinfo->CCIR601_sampling;
/* Copy the source's quantization tables. */
for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) {
if (srcinfo->quant_tbl_ptrs[tblno] != NULL) {
qtblptr = & dstinfo->quant_tbl_ptrs[tblno];
if (*qtblptr == NULL)
*qtblptr = jpeg_alloc_quant_table((j_common_ptr) dstinfo);
MEMCOPY((*qtblptr)->quantval,
srcinfo->quant_tbl_ptrs[tblno]->quantval,
SIZEOF((*qtblptr)->quantval));
(*qtblptr)->sent_table = FALSE;
}
}
/* Copy the source's per-component info.
* Note we assume jpeg_set_defaults has allocated the dest comp_info array.
*/
dstinfo->num_components = srcinfo->num_components;
if (dstinfo->num_components < 1 || dstinfo->num_components > MAX_COMPONENTS)
ERREXIT2(dstinfo, JERR_COMPONENT_COUNT, dstinfo->num_components,
MAX_COMPONENTS);
for (ci = 0, incomp = srcinfo->comp_info, outcomp = dstinfo->comp_info;
ci < dstinfo->num_components; ci++, incomp++, outcomp++) {
outcomp->component_id = incomp->component_id;
outcomp->h_samp_factor = incomp->h_samp_factor;
outcomp->v_samp_factor = incomp->v_samp_factor;
outcomp->quant_tbl_no = incomp->quant_tbl_no;
/* Make sure saved quantization table for component matches the qtable
* slot. If not, the input file re-used this qtable slot.
* IJG encoder currently cannot duplicate this.
*/
tblno = outcomp->quant_tbl_no;
if (tblno < 0 || tblno >= NUM_QUANT_TBLS ||
srcinfo->quant_tbl_ptrs[tblno] == NULL)
ERREXIT1(dstinfo, JERR_NO_QUANT_TABLE, tblno);
slot_quant = srcinfo->quant_tbl_ptrs[tblno];
c_quant = incomp->quant_table;
if (c_quant != NULL) {
for (coefi = 0; coefi < DCTSIZE2; coefi++) {
if (c_quant->quantval[coefi] != slot_quant->quantval[coefi])
ERREXIT1(dstinfo, JERR_MISMATCHED_QUANT_TABLE, tblno);
}
}
/* Note: we do not copy the source's Huffman table assignments;
* instead we rely on jpeg_set_colorspace to have made a suitable choice.
*/
}
/* Also copy JFIF version and resolution information, if available.
* Strictly speaking this isn't "critical" info, but it's nearly
* always appropriate to copy it if available. In particular,
* if the application chooses to copy JFIF 1.02 extension markers from
* the source file, we need to copy the version to make sure we don't
* emit a file that has 1.02 extensions but a claimed version of 1.01.
* We will *not*, however, copy version info from mislabeled "2.01" files.
*/
if (srcinfo->saw_JFIF_marker) {
if (srcinfo->JFIF_major_version == 1) {
dstinfo->JFIF_major_version = srcinfo->JFIF_major_version;
dstinfo->JFIF_minor_version = srcinfo->JFIF_minor_version;
}
dstinfo->density_unit = srcinfo->density_unit;
dstinfo->X_density = srcinfo->X_density;
dstinfo->Y_density = srcinfo->Y_density;
}
}
/*
* Master selection of compression modules for transcoding.
* This substitutes for jcinit.c's initialization of the full compressor.
*/
LOCAL(void)
transencode_master_selection (j_compress_ptr cinfo,
jvirt_barray_ptr * coef_arrays)
{
/* Although we don't actually use input_components for transcoding,
* jcmaster.c's initial_setup will complain if input_components is 0.
*/
cinfo->input_components = 1;
/* Initialize master control (includes parameter checking/processing) */
jinit_c_master_control(cinfo, TRUE /* transcode only */);
/* Entropy encoding: either Huffman or arithmetic coding. */
if (cinfo->arith_code) {
ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
} else {
if (cinfo->progressive_mode) {
#ifdef C_PROGRESSIVE_SUPPORTED
jinit_phuff_encoder(cinfo);
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif
} else
jinit_huff_encoder(cinfo);
}
/* We need a special coefficient buffer controller. */
transencode_coef_controller(cinfo, coef_arrays);
jinit_marker_writer(cinfo);
/* We can now tell the memory manager to allocate virtual arrays. */
(*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
/* Write the datastream header (SOI, JFIF) immediately.
* Frame and scan headers are postponed till later.
* This lets application insert special markers after the SOI.
*/
(*cinfo->marker->write_file_header) (cinfo);
}
/*
* The rest of this file is a special implementation of the coefficient
* buffer controller. This is similar to jccoefct.c, but it handles only
* output from presupplied virtual arrays. Furthermore, we generate any
* dummy padding blocks on-the-fly rather than expecting them to be present
* in the arrays.
*/
/* Private buffer controller object */
typedef struct {
struct jpeg_c_coef_controller pub; /* public fields */
JDIMENSION iMCU_row_num; /* iMCU row # within image */
JDIMENSION mcu_ctr; /* counts MCUs processed in current row */
int MCU_vert_offset; /* counts MCU rows within iMCU row */
int MCU_rows_per_iMCU_row; /* number of such rows needed */
/* Virtual block array for each component. */
jvirt_barray_ptr * whole_image;
/* Workspace for constructing dummy blocks at right/bottom edges. */
JBLOCKROW dummy_buffer[C_MAX_BLOCKS_IN_MCU];
} my_coef_controller;
typedef my_coef_controller * my_coef_ptr;
LOCAL(void)
start_iMCU_row (j_compress_ptr cinfo)
/* Reset within-iMCU-row counters for a new row */
{
my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
/* In an interleaved scan, an MCU row is the same as an iMCU row.
* In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
* But at the bottom of the image, process only what's left.
*/
if (cinfo->comps_in_scan > 1) {
coef->MCU_rows_per_iMCU_row = 1;
} else {
if (coef->iMCU_row_num < (cinfo->total_iMCU_rows-1))
coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
else
coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
}
coef->mcu_ctr = 0;
coef->MCU_vert_offset = 0;
}
/*
* Initialize for a processing pass.
*/
METHODDEF(void)
start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
{
my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
if (pass_mode != JBUF_CRANK_DEST)
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
coef->iMCU_row_num = 0;
start_iMCU_row(cinfo);
}
/*
* Process some data.
* We process the equivalent of one fully interleaved MCU row ("iMCU" row)
* per call, ie, v_samp_factor block rows for each component in the scan.
* The data is obtained from the virtual arrays and fed to the entropy coder.
* Returns TRUE if the iMCU row is completed, FALSE if suspended.
*
* NB: input_buf is ignored; it is likely to be a NULL pointer.
*/
METHODDEF(boolean)
compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
{
my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
JDIMENSION MCU_col_num; /* index of current MCU within row */
JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1;
JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
int blkn, ci, xindex, yindex, yoffset, blockcnt;
JDIMENSION start_col;
JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN];
JBLOCKROW MCU_buffer[C_MAX_BLOCKS_IN_MCU];
JBLOCKROW buffer_ptr;
jpeg_component_info *compptr;
/* Align the virtual buffers for the components used in this scan. */
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
buffer[ci] = (*cinfo->mem->access_virt_barray)
((j_common_ptr) cinfo, coef->whole_image[compptr->component_index],
coef->iMCU_row_num * compptr->v_samp_factor,
(JDIMENSION) compptr->v_samp_factor, FALSE);
}
/* Loop to process one whole iMCU row */
for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
yoffset++) {
for (MCU_col_num = coef->mcu_ctr; MCU_col_num < cinfo->MCUs_per_row;
MCU_col_num++) {
/* Construct list of pointers to DCT blocks belonging to this MCU */
blkn = 0; /* index of current DCT block within MCU */
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
start_col = MCU_col_num * compptr->MCU_width;
blockcnt = (MCU_col_num < last_MCU_col) ? compptr->MCU_width
: compptr->last_col_width;
for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
if (coef->iMCU_row_num < last_iMCU_row ||
yindex+yoffset < compptr->last_row_height) {
/* Fill in pointers to real blocks in this row */
buffer_ptr = buffer[ci][yindex+yoffset] + start_col;
for (xindex = 0; xindex < blockcnt; xindex++)
MCU_buffer[blkn++] = buffer_ptr++;
} else {
/* At bottom of image, need a whole row of dummy blocks */
xindex = 0;
}
/* Fill in any dummy blocks needed in this row.
* Dummy blocks are filled in the same way as in jccoefct.c:
* all zeroes in the AC entries, DC entries equal to previous
* block's DC value. The init routine has already zeroed the
* AC entries, so we need only set the DC entries correctly.
*/
for (; xindex < compptr->MCU_width; xindex++) {
MCU_buffer[blkn] = coef->dummy_buffer[blkn];
MCU_buffer[blkn][0][0] = MCU_buffer[blkn-1][0][0];
blkn++;
}
}
}
/* Try to write the MCU. */
if (! (*cinfo->entropy->encode_mcu) (cinfo, MCU_buffer)) {
/* Suspension forced; update state counters and exit */
coef->MCU_vert_offset = yoffset;
coef->mcu_ctr = MCU_col_num;
return FALSE;
}
}
/* Completed an MCU row, but perhaps not an iMCU row */
coef->mcu_ctr = 0;
}
/* Completed the iMCU row, advance counters for next one */
coef->iMCU_row_num++;
start_iMCU_row(cinfo);
return TRUE;
}
/*
* Initialize coefficient buffer controller.
*
* Each passed coefficient array must be the right size for that
* coefficient: width_in_blocks wide and height_in_blocks high,
* with unitheight at least v_samp_factor.
*/
LOCAL(void)
transencode_coef_controller (j_compress_ptr cinfo,
jvirt_barray_ptr * coef_arrays)
{
my_coef_ptr coef;
JBLOCKROW buffer;
int i;
coef = (my_coef_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_coef_controller));
cinfo->coef = (struct jpeg_c_coef_controller *) coef;
coef->pub.start_pass = start_pass_coef;
coef->pub.compress_data = compress_output;
/* Save pointer to virtual arrays */
coef->whole_image = coef_arrays;
/* Allocate and pre-zero space for dummy DCT blocks. */
buffer = (JBLOCKROW)
(*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
jzero_far((void FAR *) buffer, C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
for (i = 0; i < C_MAX_BLOCKS_IN_MCU; i++) {
coef->dummy_buffer[i] = buffer + i;
}
}

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/*
* jdapimin.c
*
* Copyright (C) 1994-1998, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains application interface code for the decompression half
* of the JPEG library. These are the "minimum" API routines that may be
* needed in either the normal full-decompression case or the
* transcoding-only case.
*
* Most of the routines intended to be called directly by an application
* are in this file or in jdapistd.c. But also see jcomapi.c for routines
* shared by compression and decompression, and jdtrans.c for the transcoding
* case.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/*
* Initialization of a JPEG decompression object.
* The error manager must already be set up (in case memory manager fails).
*/
GLOBAL(void)
jpeg_CreateDecompress (j_decompress_ptr cinfo, int version, size_t structsize)
{
int i;
/* Guard against version mismatches between library and caller. */
cinfo->mem = NULL; /* so jpeg_destroy knows mem mgr not called */
if (version != JPEG_LIB_VERSION)
ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
if (structsize != SIZEOF(struct jpeg_decompress_struct))
ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE,
(int) SIZEOF(struct jpeg_decompress_struct), (int) structsize);
/* For debugging purposes, we zero the whole master structure.
* But the application has already set the err pointer, and may have set
* client_data, so we have to save and restore those fields.
* Note: if application hasn't set client_data, tools like Purify may
* complain here.
*/
{
struct jpeg_error_mgr * err = cinfo->err;
void * client_data = cinfo->client_data; /* ignore Purify complaint here */
MEMZERO(cinfo, SIZEOF(struct jpeg_decompress_struct));
cinfo->err = err;
cinfo->client_data = client_data;
}
cinfo->is_decompressor = TRUE;
/* Initialize a memory manager instance for this object */
jinit_memory_mgr((j_common_ptr) cinfo);
/* Zero out pointers to permanent structures. */
cinfo->progress = NULL;
cinfo->src = NULL;
for (i = 0; i < NUM_QUANT_TBLS; i++)
cinfo->quant_tbl_ptrs[i] = NULL;
for (i = 0; i < NUM_HUFF_TBLS; i++) {
cinfo->dc_huff_tbl_ptrs[i] = NULL;
cinfo->ac_huff_tbl_ptrs[i] = NULL;
}
/* Initialize marker processor so application can override methods
* for COM, APPn markers before calling jpeg_read_header.
*/
cinfo->marker_list = NULL;
jinit_marker_reader(cinfo);
/* And initialize the overall input controller. */
jinit_input_controller(cinfo);
/* OK, I'm ready */
cinfo->global_state = DSTATE_START;
}
/*
* Destruction of a JPEG decompression object
*/
GLOBAL(void)
jpeg_destroy_decompress (j_decompress_ptr cinfo)
{
jpeg_destroy((j_common_ptr) cinfo); /* use common routine */
}
/*
* Abort processing of a JPEG decompression operation,
* but don't destroy the object itself.
*/
GLOBAL(void)
jpeg_abort_decompress (j_decompress_ptr cinfo)
{
jpeg_abort((j_common_ptr) cinfo); /* use common routine */
}
/*
* Set default decompression parameters.
*/
LOCAL(void)
default_decompress_parms (j_decompress_ptr cinfo)
{
/* Guess the input colorspace, and set output colorspace accordingly. */
/* (Wish JPEG committee had provided a real way to specify this...) */
/* Note application may override our guesses. */
switch (cinfo->num_components) {
case 1:
cinfo->jpeg_color_space = JCS_GRAYSCALE;
cinfo->out_color_space = JCS_GRAYSCALE;
break;
case 3:
if (cinfo->saw_JFIF_marker) {
cinfo->jpeg_color_space = JCS_YCbCr; /* JFIF implies YCbCr */
} else if (cinfo->saw_Adobe_marker) {
switch (cinfo->Adobe_transform) {
case 0:
cinfo->jpeg_color_space = JCS_RGB;
break;
case 1:
cinfo->jpeg_color_space = JCS_YCbCr;
break;
default:
WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform);
cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */
break;
}
} else {
/* Saw no special markers, try to guess from the component IDs */
int cid0 = cinfo->comp_info[0].component_id;
int cid1 = cinfo->comp_info[1].component_id;
int cid2 = cinfo->comp_info[2].component_id;
if (cid0 == 1 && cid1 == 2 && cid2 == 3)
cinfo->jpeg_color_space = JCS_YCbCr; /* assume JFIF w/out marker */
else if (cid0 == 82 && cid1 == 71 && cid2 == 66)
cinfo->jpeg_color_space = JCS_RGB; /* ASCII 'R', 'G', 'B' */
else {
TRACEMS3(cinfo, 1, JTRC_UNKNOWN_IDS, cid0, cid1, cid2);
cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */
}
}
/* Always guess RGB is proper output colorspace. */
cinfo->out_color_space = JCS_RGB;
break;
case 4:
if (cinfo->saw_Adobe_marker) {
switch (cinfo->Adobe_transform) {
case 0:
cinfo->jpeg_color_space = JCS_CMYK;
break;
case 2:
cinfo->jpeg_color_space = JCS_YCCK;
break;
default:
WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform);
cinfo->jpeg_color_space = JCS_YCCK; /* assume it's YCCK */
break;
}
} else {
/* No special markers, assume straight CMYK. */
cinfo->jpeg_color_space = JCS_CMYK;
}
cinfo->out_color_space = JCS_CMYK;
break;
default:
cinfo->jpeg_color_space = JCS_UNKNOWN;
cinfo->out_color_space = JCS_UNKNOWN;
break;
}
/* Set defaults for other decompression parameters. */
cinfo->scale_num = 1; /* 1:1 scaling */
cinfo->scale_denom = 1;
cinfo->output_gamma = 1.0;
cinfo->buffered_image = FALSE;
cinfo->raw_data_out = FALSE;
cinfo->dct_method = JDCT_DEFAULT;
cinfo->do_fancy_upsampling = TRUE;
cinfo->do_block_smoothing = TRUE;
cinfo->quantize_colors = FALSE;
/* We set these in case application only sets quantize_colors. */
cinfo->dither_mode = JDITHER_FS;
#ifdef QUANT_2PASS_SUPPORTED
cinfo->two_pass_quantize = TRUE;
#else
cinfo->two_pass_quantize = FALSE;
#endif
cinfo->desired_number_of_colors = 256;
cinfo->colormap = NULL;
/* Initialize for no mode change in buffered-image mode. */
cinfo->enable_1pass_quant = FALSE;
cinfo->enable_external_quant = FALSE;
cinfo->enable_2pass_quant = FALSE;
}
/*
* Decompression startup: read start of JPEG datastream to see what's there.
* Need only initialize JPEG object and supply a data source before calling.
*
* This routine will read as far as the first SOS marker (ie, actual start of
* compressed data), and will save all tables and parameters in the JPEG
* object. It will also initialize the decompression parameters to default
* values, and finally return JPEG_HEADER_OK. On return, the application may
* adjust the decompression parameters and then call jpeg_start_decompress.
* (Or, if the application only wanted to determine the image parameters,
* the data need not be decompressed. In that case, call jpeg_abort or
* jpeg_destroy to release any temporary space.)
* If an abbreviated (tables only) datastream is presented, the routine will
* return JPEG_HEADER_TABLES_ONLY upon reaching EOI. The application may then
* re-use the JPEG object to read the abbreviated image datastream(s).
* It is unnecessary (but OK) to call jpeg_abort in this case.
* The JPEG_SUSPENDED return code only occurs if the data source module
* requests suspension of the decompressor. In this case the application
* should load more source data and then re-call jpeg_read_header to resume
* processing.
* If a non-suspending data source is used and require_image is TRUE, then the
* return code need not be inspected since only JPEG_HEADER_OK is possible.
*
* This routine is now just a front end to jpeg_consume_input, with some
* extra error checking.
*/
GLOBAL(int)
jpeg_read_header (j_decompress_ptr cinfo, boolean require_image)
{
int retcode;
if (cinfo->global_state != DSTATE_START &&
cinfo->global_state != DSTATE_INHEADER)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
retcode = jpeg_consume_input(cinfo);
switch (retcode) {
case JPEG_REACHED_SOS:
retcode = JPEG_HEADER_OK;
break;
case JPEG_REACHED_EOI:
if (require_image) /* Complain if application wanted an image */
ERREXIT(cinfo, JERR_NO_IMAGE);
/* Reset to start state; it would be safer to require the application to
* call jpeg_abort, but we can't change it now for compatibility reasons.
* A side effect is to free any temporary memory (there shouldn't be any).
*/
jpeg_abort((j_common_ptr) cinfo); /* sets state = DSTATE_START */
retcode = JPEG_HEADER_TABLES_ONLY;
break;
case JPEG_SUSPENDED:
/* no work */
break;
}
return retcode;
}
/*
* Consume data in advance of what the decompressor requires.
* This can be called at any time once the decompressor object has
* been created and a data source has been set up.
*
* This routine is essentially a state machine that handles a couple
* of critical state-transition actions, namely initial setup and
* transition from header scanning to ready-for-start_decompress.
* All the actual input is done via the input controller's consume_input
* method.
*/
GLOBAL(int)
jpeg_consume_input (j_decompress_ptr cinfo)
{
int retcode = JPEG_SUSPENDED;
/* NB: every possible DSTATE value should be listed in this switch */
switch (cinfo->global_state) {
case DSTATE_START:
/* Start-of-datastream actions: reset appropriate modules */
(*cinfo->inputctl->reset_input_controller) (cinfo);
/* Initialize application's data source module */
(*cinfo->src->init_source) (cinfo);
cinfo->global_state = DSTATE_INHEADER;
/*FALLTHROUGH*/
case DSTATE_INHEADER:
retcode = (*cinfo->inputctl->consume_input) (cinfo);
if (retcode == JPEG_REACHED_SOS) { /* Found SOS, prepare to decompress */
/* Set up default parameters based on header data */
default_decompress_parms(cinfo);
/* Set global state: ready for start_decompress */
cinfo->global_state = DSTATE_READY;
}
break;
case DSTATE_READY:
/* Can't advance past first SOS until start_decompress is called */
retcode = JPEG_REACHED_SOS;
break;
case DSTATE_PRELOAD:
case DSTATE_PRESCAN:
case DSTATE_SCANNING:
case DSTATE_RAW_OK:
case DSTATE_BUFIMAGE:
case DSTATE_BUFPOST:
case DSTATE_STOPPING:
retcode = (*cinfo->inputctl->consume_input) (cinfo);
break;
default:
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
}
return retcode;
}
/*
* Have we finished reading the input file?
*/
GLOBAL(boolean)
jpeg_input_complete (j_decompress_ptr cinfo)
{
/* Check for valid jpeg object */
if (cinfo->global_state < DSTATE_START ||
cinfo->global_state > DSTATE_STOPPING)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
return cinfo->inputctl->eoi_reached;
}
/*
* Is there more than one scan?
*/
GLOBAL(boolean)
jpeg_has_multiple_scans (j_decompress_ptr cinfo)
{
/* Only valid after jpeg_read_header completes */
if (cinfo->global_state < DSTATE_READY ||
cinfo->global_state > DSTATE_STOPPING)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
return cinfo->inputctl->has_multiple_scans;
}
/*
* Finish JPEG decompression.
*
* This will normally just verify the file trailer and release temp storage.
*
* Returns FALSE if suspended. The return value need be inspected only if
* a suspending data source is used.
*/
GLOBAL(boolean)
jpeg_finish_decompress (j_decompress_ptr cinfo)
{
if ((cinfo->global_state == DSTATE_SCANNING ||
cinfo->global_state == DSTATE_RAW_OK) && ! cinfo->buffered_image) {
/* Terminate final pass of non-buffered mode */
if (cinfo->output_scanline < cinfo->output_height)
ERREXIT(cinfo, JERR_TOO_LITTLE_DATA);
(*cinfo->master->finish_output_pass) (cinfo);
cinfo->global_state = DSTATE_STOPPING;
} else if (cinfo->global_state == DSTATE_BUFIMAGE) {
/* Finishing after a buffered-image operation */
cinfo->global_state = DSTATE_STOPPING;
} else if (cinfo->global_state != DSTATE_STOPPING) {
/* STOPPING = repeat call after a suspension, anything else is error */
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
}
/* Read until EOI */
while (! cinfo->inputctl->eoi_reached) {
if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED)
return FALSE; /* Suspend, come back later */
}
/* Do final cleanup */
(*cinfo->src->term_source) (cinfo);
/* We can use jpeg_abort to release memory and reset global_state */
jpeg_abort((j_common_ptr) cinfo);
return TRUE;
}

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/*
* jdapistd.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains application interface code for the decompression half
* of the JPEG library. These are the "standard" API routines that are
* used in the normal full-decompression case. They are not used by a
* transcoding-only application. Note that if an application links in
* jpeg_start_decompress, it will end up linking in the entire decompressor.
* We thus must separate this file from jdapimin.c to avoid linking the
* whole decompression library into a transcoder.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
/* Forward declarations */
LOCAL(boolean) output_pass_setup JPP((j_decompress_ptr cinfo));
/*
* Decompression initialization.
* jpeg_read_header must be completed before calling this.
*
* If a multipass operating mode was selected, this will do all but the
* last pass, and thus may take a great deal of time.
*
* Returns FALSE if suspended. The return value need be inspected only if
* a suspending data source is used.
*/
GLOBAL(boolean)
jpeg_start_decompress (j_decompress_ptr cinfo)
{
if (cinfo->global_state == DSTATE_READY) {
/* First call: initialize master control, select active modules */
jinit_master_decompress(cinfo);
if (cinfo->buffered_image) {
/* No more work here; expecting jpeg_start_output next */
cinfo->global_state = DSTATE_BUFIMAGE;
return TRUE;
}
cinfo->global_state = DSTATE_PRELOAD;
}
if (cinfo->global_state == DSTATE_PRELOAD) {
/* If file has multiple scans, absorb them all into the coef buffer */
if (cinfo->inputctl->has_multiple_scans) {
#ifdef D_MULTISCAN_FILES_SUPPORTED
for (;;) {
int retcode;
/* Call progress monitor hook if present */
if (cinfo->progress != NULL)
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
/* Absorb some more input */
retcode = (*cinfo->inputctl->consume_input) (cinfo);
if (retcode == JPEG_SUSPENDED)
return FALSE;
if (retcode == JPEG_REACHED_EOI)
break;
/* Advance progress counter if appropriate */
if (cinfo->progress != NULL &&
(retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
/* jdmaster underestimated number of scans; ratchet up one scan */
cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
}
}
}
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif /* D_MULTISCAN_FILES_SUPPORTED */
}
cinfo->output_scan_number = cinfo->input_scan_number;
} else if (cinfo->global_state != DSTATE_PRESCAN)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* Perform any dummy output passes, and set up for the final pass */
return output_pass_setup(cinfo);
}
/*
* Set up for an output pass, and perform any dummy pass(es) needed.
* Common subroutine for jpeg_start_decompress and jpeg_start_output.
* Entry: global_state = DSTATE_PRESCAN only if previously suspended.
* Exit: If done, returns TRUE and sets global_state for proper output mode.
* If suspended, returns FALSE and sets global_state = DSTATE_PRESCAN.
*/
LOCAL(boolean)
output_pass_setup (j_decompress_ptr cinfo)
{
if (cinfo->global_state != DSTATE_PRESCAN) {
/* First call: do pass setup */
(*cinfo->master->prepare_for_output_pass) (cinfo);
cinfo->output_scanline = 0;
cinfo->global_state = DSTATE_PRESCAN;
}
/* Loop over any required dummy passes */
while (cinfo->master->is_dummy_pass) {
#ifdef QUANT_2PASS_SUPPORTED
/* Crank through the dummy pass */
while (cinfo->output_scanline < cinfo->output_height) {
JDIMENSION last_scanline;
/* Call progress monitor hook if present */
if (cinfo->progress != NULL) {
cinfo->progress->pass_counter = (long) cinfo->output_scanline;
cinfo->progress->pass_limit = (long) cinfo->output_height;
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
}
/* Process some data */
last_scanline = cinfo->output_scanline;
(*cinfo->main->process_data) (cinfo, (JSAMPARRAY) NULL,
&cinfo->output_scanline, (JDIMENSION) 0);
if (cinfo->output_scanline == last_scanline)
return FALSE; /* No progress made, must suspend */
}
/* Finish up dummy pass, and set up for another one */
(*cinfo->master->finish_output_pass) (cinfo);
(*cinfo->master->prepare_for_output_pass) (cinfo);
cinfo->output_scanline = 0;
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif /* QUANT_2PASS_SUPPORTED */
}
/* Ready for application to drive output pass through
* jpeg_read_scanlines or jpeg_read_raw_data.
*/
cinfo->global_state = cinfo->raw_data_out ? DSTATE_RAW_OK : DSTATE_SCANNING;
return TRUE;
}
/*
* Read some scanlines of data from the JPEG decompressor.
*
* The return value will be the number of lines actually read.
* This may be less than the number requested in several cases,
* including bottom of image, data source suspension, and operating
* modes that emit multiple scanlines at a time.
*
* Note: we warn about excess calls to jpeg_read_scanlines() since
* this likely signals an application programmer error. However,
* an oversize buffer (max_lines > scanlines remaining) is not an error.
*/
GLOBAL(JDIMENSION)
jpeg_read_scanlines (j_decompress_ptr cinfo, JSAMPARRAY scanlines,
JDIMENSION max_lines)
{
JDIMENSION row_ctr;
if (cinfo->global_state != DSTATE_SCANNING)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
if (cinfo->output_scanline >= cinfo->output_height) {
WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
return 0;
}
/* Call progress monitor hook if present */
if (cinfo->progress != NULL) {
cinfo->progress->pass_counter = (long) cinfo->output_scanline;
cinfo->progress->pass_limit = (long) cinfo->output_height;
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
}
/* Process some data */
row_ctr = 0;
(*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, max_lines);
cinfo->output_scanline += row_ctr;
return row_ctr;
}
/*
* Alternate entry point to read raw data.
* Processes exactly one iMCU row per call, unless suspended.
*/
GLOBAL(JDIMENSION)
jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data,
JDIMENSION max_lines)
{
JDIMENSION lines_per_iMCU_row;
if (cinfo->global_state != DSTATE_RAW_OK)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
if (cinfo->output_scanline >= cinfo->output_height) {
WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
return 0;
}
/* Call progress monitor hook if present */
if (cinfo->progress != NULL) {
cinfo->progress->pass_counter = (long) cinfo->output_scanline;
cinfo->progress->pass_limit = (long) cinfo->output_height;
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
}
/* Verify that at least one iMCU row can be returned. */
lines_per_iMCU_row = cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size;
if (max_lines < lines_per_iMCU_row)
ERREXIT(cinfo, JERR_BUFFER_SIZE);
/* Decompress directly into user's buffer. */
if (! (*cinfo->coef->decompress_data) (cinfo, data))
return 0; /* suspension forced, can do nothing more */
/* OK, we processed one iMCU row. */
cinfo->output_scanline += lines_per_iMCU_row;
return lines_per_iMCU_row;
}
/* Additional entry points for buffered-image mode. */
#ifdef D_MULTISCAN_FILES_SUPPORTED
/*
* Initialize for an output pass in buffered-image mode.
*/
GLOBAL(boolean)
jpeg_start_output (j_decompress_ptr cinfo, int scan_number)
{
if (cinfo->global_state != DSTATE_BUFIMAGE &&
cinfo->global_state != DSTATE_PRESCAN)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* Limit scan number to valid range */
if (scan_number <= 0)
scan_number = 1;
if (cinfo->inputctl->eoi_reached &&
scan_number > cinfo->input_scan_number)
scan_number = cinfo->input_scan_number;
cinfo->output_scan_number = scan_number;
/* Perform any dummy output passes, and set up for the real pass */
return output_pass_setup(cinfo);
}
/*
* Finish up after an output pass in buffered-image mode.
*
* Returns FALSE if suspended. The return value need be inspected only if
* a suspending data source is used.
*/
GLOBAL(boolean)
jpeg_finish_output (j_decompress_ptr cinfo)
{
if ((cinfo->global_state == DSTATE_SCANNING ||
cinfo->global_state == DSTATE_RAW_OK) && cinfo->buffered_image) {
/* Terminate this pass. */
/* We do not require the whole pass to have been completed. */
(*cinfo->master->finish_output_pass) (cinfo);
cinfo->global_state = DSTATE_BUFPOST;
} else if (cinfo->global_state != DSTATE_BUFPOST) {
/* BUFPOST = repeat call after a suspension, anything else is error */
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
}
/* Read markers looking for SOS or EOI */
while (cinfo->input_scan_number <= cinfo->output_scan_number &&
! cinfo->inputctl->eoi_reached) {
if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED)
return FALSE; /* Suspend, come back later */
}
cinfo->global_state = DSTATE_BUFIMAGE;
return TRUE;
}
#endif /* D_MULTISCAN_FILES_SUPPORTED */

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@ -1,151 +0,0 @@
/*
* jdatadst.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains compression data destination routines for the case of
* emitting JPEG data to a file (or any stdio stream). While these routines
* are sufficient for most applications, some will want to use a different
* destination manager.
* IMPORTANT: we assume that fwrite() will correctly transcribe an array of
* JOCTETs into 8-bit-wide elements on external storage. If char is wider
* than 8 bits on your machine, you may need to do some tweaking.
*/
/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
#include "jinclude.h"
#include "jpeglib.h"
#include "jerror.h"
/* Expanded data destination object for stdio output */
typedef struct {
struct jpeg_destination_mgr pub; /* public fields */
FILE * outfile; /* target stream */
JOCTET * buffer; /* start of buffer */
} my_destination_mgr;
typedef my_destination_mgr * my_dest_ptr;
#define OUTPUT_BUF_SIZE 4096 /* choose an efficiently fwrite'able size */
/*
* Initialize destination --- called by jpeg_start_compress
* before any data is actually written.
*/
METHODDEF(void)
init_destination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
/* Allocate the output buffer --- it will be released when done with image */
dest->buffer = (JOCTET *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
OUTPUT_BUF_SIZE * SIZEOF(JOCTET));
dest->pub.next_output_byte = dest->buffer;
dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
}
/*
* Empty the output buffer --- called whenever buffer fills up.
*
* In typical applications, this should write the entire output buffer
* (ignoring the current state of next_output_byte & free_in_buffer),
* reset the pointer & count to the start of the buffer, and return TRUE
* indicating that the buffer has been dumped.
*
* In applications that need to be able to suspend compression due to output
* overrun, a FALSE return indicates that the buffer cannot be emptied now.
* In this situation, the compressor will return to its caller (possibly with
* an indication that it has not accepted all the supplied scanlines). The
* application should resume compression after it has made more room in the
* output buffer. Note that there are substantial restrictions on the use of
* suspension --- see the documentation.
*
* When suspending, the compressor will back up to a convenient restart point
* (typically the start of the current MCU). next_output_byte & free_in_buffer
* indicate where the restart point will be if the current call returns FALSE.
* Data beyond this point will be regenerated after resumption, so do not
* write it out when emptying the buffer externally.
*/
METHODDEF(boolean)
empty_output_buffer (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
if (JFWRITE(dest->outfile, dest->buffer, OUTPUT_BUF_SIZE) !=
(size_t) OUTPUT_BUF_SIZE)
ERREXIT(cinfo, JERR_FILE_WRITE);
dest->pub.next_output_byte = dest->buffer;
dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
return TRUE;
}
/*
* Terminate destination --- called by jpeg_finish_compress
* after all data has been written. Usually needs to flush buffer.
*
* NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
* application must deal with any cleanup that should happen even
* for error exit.
*/
METHODDEF(void)
term_destination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
/* Write any data remaining in the buffer */
if (datacount > 0) {
if (JFWRITE(dest->outfile, dest->buffer, datacount) != datacount)
ERREXIT(cinfo, JERR_FILE_WRITE);
}
fflush(dest->outfile);
/* Make sure we wrote the output file OK */
if (ferror(dest->outfile))
ERREXIT(cinfo, JERR_FILE_WRITE);
}
/*
* Prepare for output to a stdio stream.
* The caller must have already opened the stream, and is responsible
* for closing it after finishing compression.
*/
GLOBAL(void)
jpeg_stdio_dest (j_compress_ptr cinfo, FILE * outfile)
{
my_dest_ptr dest;
/* The destination object is made permanent so that multiple JPEG images
* can be written to the same file without re-executing jpeg_stdio_dest.
* This makes it dangerous to use this manager and a different destination
* manager serially with the same JPEG object, because their private object
* sizes may be different. Caveat programmer.
*/
if (cinfo->dest == NULL) { /* first time for this JPEG object? */
cinfo->dest = (struct jpeg_destination_mgr *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
SIZEOF(my_destination_mgr));
}
dest = (my_dest_ptr) cinfo->dest;
dest->pub.init_destination = init_destination;
dest->pub.empty_output_buffer = empty_output_buffer;
dest->pub.term_destination = term_destination;
dest->outfile = outfile;
}

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/*
* jdatasrc.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains decompression data source routines for the case of
* reading JPEG data from a file (or any stdio stream). While these routines
* are sufficient for most applications, some will want to use a different
* source manager.
* IMPORTANT: we assume that fread() will correctly transcribe an array of
* JOCTETs from 8-bit-wide elements on external storage. If char is wider
* than 8 bits on your machine, you may need to do some tweaking.
*/
/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
#include "jinclude.h"
#include "jpeglib.h"
#include "jerror.h"
/* Expanded data source object for stdio input */
typedef struct {
struct jpeg_source_mgr pub; /* public fields */
FILE * infile; /* source stream */
JOCTET * buffer; /* start of buffer */
boolean start_of_file; /* have we gotten any data yet? */
} my_source_mgr;
typedef my_source_mgr * my_src_ptr;
#define INPUT_BUF_SIZE 4096 /* choose an efficiently fread'able size */
/*
* Initialize source --- called by jpeg_read_header
* before any data is actually read.
*/
METHODDEF(void)
init_source (j_decompress_ptr cinfo)
{
my_src_ptr src = (my_src_ptr) cinfo->src;
/* We reset the empty-input-file flag for each image,
* but we don't clear the input buffer.
* This is correct behavior for reading a series of images from one source.
*/
src->start_of_file = TRUE;
}
/*
* Fill the input buffer --- called whenever buffer is emptied.
*
* In typical applications, this should read fresh data into the buffer
* (ignoring the current state of next_input_byte & bytes_in_buffer),
* reset the pointer & count to the start of the buffer, and return TRUE
* indicating that the buffer has been reloaded. It is not necessary to
* fill the buffer entirely, only to obtain at least one more byte.
*
* There is no such thing as an EOF return. If the end of the file has been
* reached, the routine has a choice of ERREXIT() or inserting fake data into
* the buffer. In most cases, generating a warning message and inserting a
* fake EOI marker is the best course of action --- this will allow the
* decompressor to output however much of the image is there. However,
* the resulting error message is misleading if the real problem is an empty
* input file, so we handle that case specially.
*
* In applications that need to be able to suspend compression due to input
* not being available yet, a FALSE return indicates that no more data can be
* obtained right now, but more may be forthcoming later. In this situation,
* the decompressor will return to its caller (with an indication of the
* number of scanlines it has read, if any). The application should resume
* decompression after it has loaded more data into the input buffer. Note
* that there are substantial restrictions on the use of suspension --- see
* the documentation.
*
* When suspending, the decompressor will back up to a convenient restart point
* (typically the start of the current MCU). next_input_byte & bytes_in_buffer
* indicate where the restart point will be if the current call returns FALSE.
* Data beyond this point must be rescanned after resumption, so move it to
* the front of the buffer rather than discarding it.
*/
METHODDEF(boolean)
fill_input_buffer (j_decompress_ptr cinfo)
{
my_src_ptr src = (my_src_ptr) cinfo->src;
size_t nbytes;
nbytes = JFREAD(src->infile, src->buffer, INPUT_BUF_SIZE);
if (nbytes <= 0) {
if (src->start_of_file) /* Treat empty input file as fatal error */
ERREXIT(cinfo, JERR_INPUT_EMPTY);
WARNMS(cinfo, JWRN_JPEG_EOF);
/* Insert a fake EOI marker */
src->buffer[0] = (JOCTET) 0xFF;
src->buffer[1] = (JOCTET) JPEG_EOI;
nbytes = 2;
}
src->pub.next_input_byte = src->buffer;
src->pub.bytes_in_buffer = nbytes;
src->start_of_file = FALSE;
return TRUE;
}
/*
* Skip data --- used to skip over a potentially large amount of
* uninteresting data (such as an APPn marker).
*
* Writers of suspendable-input applications must note that skip_input_data
* is not granted the right to give a suspension return. If the skip extends
* beyond the data currently in the buffer, the buffer can be marked empty so
* that the next read will cause a fill_input_buffer call that can suspend.
* Arranging for additional bytes to be discarded before reloading the input
* buffer is the application writer's problem.
*/
METHODDEF(void)
skip_input_data (j_decompress_ptr cinfo, long num_bytes)
{
my_src_ptr src = (my_src_ptr) cinfo->src;
/* Just a dumb implementation for now. Could use fseek() except
* it doesn't work on pipes. Not clear that being smart is worth
* any trouble anyway --- large skips are infrequent.
*/
if (num_bytes > 0) {
while (num_bytes > (long) src->pub.bytes_in_buffer) {
num_bytes -= (long) src->pub.bytes_in_buffer;
(void) fill_input_buffer(cinfo);
/* note we assume that fill_input_buffer will never return FALSE,
* so suspension need not be handled.
*/
}
src->pub.next_input_byte += (size_t) num_bytes;
src->pub.bytes_in_buffer -= (size_t) num_bytes;
}
}
/*
* An additional method that can be provided by data source modules is the
* resync_to_restart method for error recovery in the presence of RST markers.
* For the moment, this source module just uses the default resync method
* provided by the JPEG library. That method assumes that no backtracking
* is possible.
*/
/*
* Terminate source --- called by jpeg_finish_decompress
* after all data has been read. Often a no-op.
*
* NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
* application must deal with any cleanup that should happen even
* for error exit.
*/
METHODDEF(void)
term_source (j_decompress_ptr cinfo)
{
/* no work necessary here */
}
/*
* Prepare for input from a stdio stream.
* The caller must have already opened the stream, and is responsible
* for closing it after finishing decompression.
*/
GLOBAL(void)
jpeg_stdio_src (j_decompress_ptr cinfo, FILE * infile)
{
my_src_ptr src;
/* The source object and input buffer are made permanent so that a series
* of JPEG images can be read from the same file by calling jpeg_stdio_src
* only before the first one. (If we discarded the buffer at the end of
* one image, we'd likely lose the start of the next one.)
* This makes it unsafe to use this manager and a different source
* manager serially with the same JPEG object. Caveat programmer.
*/
if (cinfo->src == NULL) { /* first time for this JPEG object? */
cinfo->src = (struct jpeg_source_mgr *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
SIZEOF(my_source_mgr));
src = (my_src_ptr) cinfo->src;
src->buffer = (JOCTET *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
INPUT_BUF_SIZE * SIZEOF(JOCTET));
}
src = (my_src_ptr) cinfo->src;
src->pub.init_source = init_source;
src->pub.fill_input_buffer = fill_input_buffer;
src->pub.skip_input_data = skip_input_data;
src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
src->pub.term_source = term_source;
src->infile = infile;
src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
src->pub.next_input_byte = NULL; /* until buffer loaded */
}

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