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cdrom: improve position setting

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This commit is contained in:
Brad Parker 2019-06-30 01:47:29 -04:00
parent 9617605371
commit 24bd43a53f
6 changed files with 34 additions and 47 deletions
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6
libretro-common/cdrom/cdrom.c
View File

@ -213,7 +213,9 @@ retry:
#endif
{
rv = 0;
memcpy(buf, xfer_buf + skip, len);
if (buf)
memcpy(buf, xfer_buf + skip, len);
}
else
{
@ -516,6 +518,7 @@ int cdrom_write_cue(libretro_vfs_implementation_file *stream, char **out_buf, si
unsigned char pmin = buf[4 + (i * 11) + 8];
unsigned char psec = buf[4 + (i * 11) + 9];
unsigned char pframe = buf[4 + (i * 11) + 10];
unsigned lba = msf_to_lba(pmin, psec, pframe);
/*printf("i %d control %d adr %d tno %d point %d: ", i, control, adr, tno, point);*/
/* why is control always 0? */
@ -538,6 +541,7 @@ int cdrom_write_cue(libretro_vfs_implementation_file *stream, char **out_buf, si
toc->track[point - 1].min = pmin;
toc->track[point - 1].sec = psec;
toc->track[point - 1].frame = pframe;
toc->track[point - 1].lba = lba;
toc->track[point - 1].mode = mode;
toc->track[point - 1].audio = audio;

5
libretro-common/include/cdrom/cdrom.h
View File

@ -44,10 +44,11 @@ RETRO_BEGIN_DECLS
typedef struct
{
unsigned lba_start;
unsigned lba_start; /* start of pregap */
unsigned lba; /* start of data */
unsigned track_size;
unsigned char track_num;
unsigned char min;
unsigned char min; /* start of data */
unsigned char sec;
unsigned char frame;
unsigned char mode;

1
libretro-common/include/vfs/vfs_implementation.h
View File

@ -23,6 +23,7 @@
#ifndef __LIBRETRO_SDK_VFS_IMPLEMENTATION_H
#define __LIBRETRO_SDK_VFS_IMPLEMENTATION_H
#include <stdio.h>
#include <stdint.h>
#include <libretro.h>

3
libretro-common/include/vfs/vfs_implementation_cdrom.h
View File

@ -33,12 +33,13 @@ typedef struct
{
char *cue_buf;
size_t cue_len;
size_t byte_pos;
int64_t byte_pos;
char drive;
unsigned char cur_min;
unsigned char cur_sec;
unsigned char cur_frame;
unsigned char cur_track;
unsigned cur_lba;
} vfs_cdrom_t;
#ifdef VFS_FRONTEND

8
libretro-common/vfs/vfs_implementation.c
View File

@ -555,17 +555,17 @@ int retro_vfs_file_close_impl(libretro_vfs_implementation_file *stream)
close(stream->fd);
#endif
}
#ifdef HAVE_CDROM
end:
if (stream->cdrom.cue_buf)
free(stream->cdrom.cue_buf);
#endif
if (stream->buf)
free(stream->buf);
if (stream->orig_path)
free(stream->orig_path);
#ifdef HAVE_CDROM
if (stream->cdrom.cue_buf)
free(stream->cdrom.cue_buf);
#endif
free(stream);
return 0;

58
libretro-common/vfs/vfs_implementation_cdrom.c
View File

@ -24,6 +24,7 @@
#include <file/file_path.h>
#include <compat/fopen_utf8.h>
#include <string/stdstring.h>
#include <cdrom/cdrom.h>
#ifdef _WIN32
#include <windows.h>
@ -62,7 +63,7 @@ int64_t retro_vfs_file_seek_cdrom(libretro_vfs_implementation_file *stream, int6
}
else if (string_is_equal_noncase(ext, "bin"))
{
unsigned frames = (offset / 2352);
int lba = (offset / 2352);
unsigned char min = 0;
unsigned char sec = 0;
unsigned char frame = 0;
@ -70,33 +71,25 @@ int64_t retro_vfs_file_seek_cdrom(libretro_vfs_implementation_file *stream, int6
(void)seek_type;
lba_to_msf(frames, &min, &sec, &frame);
switch (whence)
{
case SEEK_CUR:
{
min += stream->cdrom.cur_min;
sec += stream->cdrom.cur_sec;
frame += stream->cdrom.cur_frame;
unsigned new_lba;
stream->cdrom.byte_pos += offset;
new_lba = vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba + (stream->cdrom.byte_pos / 2352);
seek_type = "SEEK_CUR";
lba_to_msf(new_lba, &min, &sec, &frame);
break;
}
case SEEK_END:
{
unsigned char end_min = 0;
unsigned char end_sec = 0;
unsigned char end_frame = 0;
size_t end_lba = (vfs_cdrom_toc.track[vfs_cdrom_toc.num_tracks - 1].lba_start + vfs_cdrom_toc.track[vfs_cdrom_toc.num_tracks - 1].track_size) - 1;
ssize_t end_lba = (vfs_cdrom_toc.track[vfs_cdrom_toc.num_tracks - 1].lba_start + vfs_cdrom_toc.track[vfs_cdrom_toc.num_tracks - 1].track_size) - 1;
lba_to_msf(end_lba, &min, &sec, &frame);
min += end_min;
sec += end_sec;
frame += end_frame;
lba_to_msf(end_lba + lba, &min, &sec, &frame);
stream->cdrom.byte_pos = end_lba * 2352;
seek_type = "SEEK_END";
@ -108,7 +101,7 @@ int64_t retro_vfs_file_seek_cdrom(libretro_vfs_implementation_file *stream, int6
{
seek_type = "SEEK_SET";
stream->cdrom.byte_pos = offset;
lba_to_msf(vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba + (stream->cdrom.byte_pos / 2352), &min, &sec, &frame);
break;
}
}
@ -116,9 +109,10 @@ int64_t retro_vfs_file_seek_cdrom(libretro_vfs_implementation_file *stream, int6
stream->cdrom.cur_min = min;
stream->cdrom.cur_sec = sec;
stream->cdrom.cur_frame = frame;
stream->cdrom.cur_lba = msf_to_lba(min, sec, frame);
#ifdef CDROM_DEBUG
printf("CDROM Seek %s: Path %s Offset %" PRIu64 " is now at %" PRIu64 " (MSF %02d:%02d:%02d) (LBA %u)...\n", seek_type, stream->orig_path, offset, stream->cdrom.byte_pos, stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame, msf_to_lba(stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame));
printf("CDROM Seek %s: Path %s Offset %" PRIu64 " is now at %" PRIu64 " (MSF %02d:%02d:%02d) (LBA %u)...\n", seek_type, stream->orig_path, offset, stream->cdrom.byte_pos, stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame, stream->cdrom.cur_lba);
fflush(stdout);
#endif
}
@ -298,12 +292,14 @@ void retro_vfs_file_open_cdrom(
stream->cdrom.cur_min = vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].min;
stream->cdrom.cur_sec = vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].sec;
stream->cdrom.cur_frame = vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].frame;
stream->cdrom.cur_lba = msf_to_lba(stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame);
}
else
{
stream->cdrom.cur_min = vfs_cdrom_toc.track[0].min;
stream->cdrom.cur_sec = vfs_cdrom_toc.track[0].sec;
stream->cdrom.cur_frame = vfs_cdrom_toc.track[0].frame;
stream->cdrom.cur_lba = msf_to_lba(stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame);
}
}
@ -342,13 +338,11 @@ int64_t retro_vfs_file_tell_cdrom(libretro_vfs_implementation_file *stream)
}
else if (string_is_equal_noncase(ext, "bin"))
{
unsigned lba = msf_to_lba(stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame);
#ifdef CDROM_DEBUG
printf("CDROM (bin) Tell: Path %s Position %u\n", stream->orig_path, lba * 2352);
printf("CDROM (bin) Tell: Path %s Position %" PRId64 "\n", stream->orig_path, stream->cdrom.byte_pos);
fflush(stdout);
#endif
return lba * 2352;
return stream->cdrom.byte_pos;
}
return -1;
@ -384,26 +378,15 @@ int64_t retro_vfs_file_read_cdrom(libretro_vfs_implementation_file *stream,
}
else if (string_is_equal_noncase(ext, "bin"))
{
unsigned frames = len / 2352;
unsigned i;
size_t skip = stream->cdrom.byte_pos % 2352;
unsigned char min = 0;
unsigned char sec = 0;
unsigned char frame = 0;
unsigned lba_cur = 0;
unsigned lba_start = 0;
lba_cur = msf_to_lba(stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame);
if (vfs_cdrom_toc.num_tracks > 1 && stream->cdrom.cur_track)
lba_start = msf_to_lba(vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].min, vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].sec, vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].frame);
else
lba_start = msf_to_lba(vfs_cdrom_toc.track[0].min, vfs_cdrom_toc.track[0].sec, vfs_cdrom_toc.track[0].frame);
lba_to_msf(lba_start + lba_cur, &min, &sec, &frame);
lba_to_msf(stream->cdrom.cur_lba, &min, &sec, &frame);
#ifdef CDROM_DEBUG
printf("CDROM Read: Reading %" PRIu64 " bytes from %s starting at byte offset %" PRIu64 " (MSF %02d:%02d:%02d) (LBA %u) skip %" PRIu64 "...\n", len, stream->orig_path, stream->cdrom.byte_pos, min, sec, frame, msf_to_lba(min, sec, frame), skip);
printf("CDROM Read: Reading %" PRIu64 " bytes from %s starting at byte offset %" PRIu64 " (MSF %02d:%02d:%02d) (LBA %u) skip %" PRIu64 "...\n", len, stream->orig_path, stream->cdrom.byte_pos, min, sec, frame, stream->cdrom.cur_lba, skip);
fflush(stdout);
#endif
@ -419,11 +402,8 @@ int64_t retro_vfs_file_read_cdrom(libretro_vfs_implementation_file *stream,
}
stream->cdrom.byte_pos += len;
for (i = 0; i < frames; i++)
{
increment_msf(&stream->cdrom.cur_min, &stream->cdrom.cur_sec, &stream->cdrom.cur_frame);
}
stream->cdrom.cur_lba = vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba + (stream->cdrom.byte_pos / 2352);
lba_to_msf(stream->cdrom.cur_lba, &stream->cdrom.cur_min, &stream->cdrom.cur_sec, &stream->cdrom.cur_frame);
#ifdef CDROM_DEBUG
printf("CDROM read %" PRIu64 " bytes, position is now: %" PRIu64 " (MSF %02d:%02d:%02d) (LBA %u)\n", len, stream->cdrom.byte_pos, stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame, msf_to_lba(stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame));