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RetroArch/libretro-common/cdrom/cdrom.c
libretroadmin c570e657c1 (CDROM) Fix memory leak caught with asan - buf passed to filestream_read_file 
was not being freed after we were done with it (we are done with it after iterating
over the string list)
2022-07-15 19:00:59 +02:00

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/* Copyright (C) 2010-2020 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (cdrom.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <cdrom/cdrom.h>
#include <libretro.h>
#include <stdio.h>
#include <string.h>
#include <compat/strl.h>
#include <compat/strcasestr.h>
#include <retro_math.h>
#include <retro_timers.h>
#include <streams/file_stream.h>
#include <retro_endianness.h>
#include <retro_miscellaneous.h>
#include <vfs/vfs_implementation.h>
#include <lists/string_list.h>
#include <lists/dir_list.h>
#include <string/stdstring.h>
#include <memalign.h>
#include <math.h>
#ifdef _WIN32
#include <direct.h>
#else
#include <unistd.h>
#endif
#if defined(__linux__) && !defined(ANDROID)
#include <sys/ioctl.h>
#include <scsi/sg.h>
#endif
#if defined(_WIN32) && !defined(_XBOX)
#include <windows.h>
#include <winioctl.h>
#include <ntddscsi.h>
#endif
#define CDROM_CUE_TRACK_BYTES 107
#define CDROM_MAX_SENSE_BYTES 16
#define CDROM_MAX_RETRIES 10
typedef enum
{
DIRECTION_NONE,
DIRECTION_IN,
DIRECTION_OUT
} CDROM_CMD_Direction;
void cdrom_lba_to_msf(unsigned lba, unsigned char *min, unsigned char *sec, unsigned char *frame)
{
if (!min || !sec || !frame)
return;
*frame = lba % 75;
lba /= 75;
*sec = lba % 60;
lba /= 60;
*min = lba;
}
unsigned cdrom_msf_to_lba(unsigned char min, unsigned char sec, unsigned char frame)
{
return (min * 60 + sec) * 75 + frame;
}
void increment_msf(unsigned char *min, unsigned char *sec, unsigned char *frame)
{
if (!min || !sec || !frame)
return;
*min = (*frame == 74) ? (*sec < 59 ? *min : *min + 1) : *min;
*sec = (*frame == 74) ? (*sec < 59 ? (*sec + 1) : 0) : *sec;
*frame = (*frame < 74) ? (*frame + 1) : 0;
}
#ifdef CDROM_DEBUG
static void cdrom_print_sense_data(const unsigned char *sense, size_t len)
{
unsigned i;
const char *sense_key_text = NULL;
unsigned char key;
unsigned char asc;
unsigned char ascq;
if (len < 16)
{
printf("[CDROM] Sense data buffer length too small.\n");
fflush(stdout);
return;
}
key = sense[2] & 0xF;
asc = sense[12];
ascq = sense[13];
printf("[CDROM] Sense Data: ");
for (i = 0; i < MIN(len, 16); i++)
{
printf("%02X ", sense[i]);
}
printf("\n");
if (sense[0] == 0x70)
printf("[CDROM] CURRENT ERROR:\n");
if (sense[0] == 0x71)
printf("[CDROM] DEFERRED ERROR:\n");
switch (key)
{
case 0:
sense_key_text = "NO SENSE";
break;
case 1:
sense_key_text = "RECOVERED ERROR";
break;
case 2:
sense_key_text = "NOT READY";
break;
case 3:
sense_key_text = "MEDIUM ERROR";
break;
case 4:
sense_key_text = "HARDWARE ERROR";
break;
case 5:
sense_key_text = "ILLEGAL REQUEST";
break;
case 6:
sense_key_text = "UNIT ATTENTION";
break;
case 7:
sense_key_text = "DATA PROTECT";
break;
case 8:
sense_key_text = "BLANK CHECK";
break;
case 9:
sense_key_text = "VENDOR SPECIFIC";
break;
case 10:
sense_key_text = "COPY ABORTED";
break;
case 11:
sense_key_text = "ABORTED COMMAND";
break;
case 13:
sense_key_text = "VOLUME OVERFLOW";
break;
case 14:
sense_key_text = "MISCOMPARE";
break;
}
printf("[CDROM] Sense Key: %02X (%s)\n", key, sense_key_text ? sense_key_text : "null");
printf("[CDROM] ASC: %02X\n", asc);
printf("[CDROM] ASCQ: %02X\n", ascq);
switch (key)
{
case 2:
{
switch (asc)
{
case 4:
{
switch (ascq)
{
case 1:
printf("[CDROM] Description: LOGICAL UNIT IS IN PROCESS OF BECOMING READY\n");
break;
default:
break;
}
break;
}
case 0x3a:
{
switch (ascq)
{
case 0:
printf("[CDROM] Description: MEDIUM NOT PRESENT\n");
break;
case 3:
printf("[CDROM] Description: MEDIUM NOT PRESENT - LOADABLE\n");
break;
case 1:
printf("[CDROM] Description: MEDIUM NOT PRESENT - TRAY CLOSED\n");
break;
case 2:
printf("[CDROM] Description: MEDIUM NOT PRESENT - TRAY OPEN\n");
break;
default:
break;
}
break;
}
default:
break;
}
}
case 3:
{
if (asc == 0x11 && ascq == 0x5)
printf("[CDROM] Description: L-EC UNCORRECTABLE ERROR\n");
break;
}
case 5:
{
if (asc == 0x20 && ascq == 0)
printf("[CDROM] Description: INVALID COMMAND OPERATION CODE\n");
else if (asc == 0x24 && ascq == 0)
printf("[CDROM] Description: INVALID FIELD IN CDB\n");
else if (asc == 0x26 && ascq == 0)
printf("[CDROM] Description: INVALID FIELD IN PARAMETER LIST\n");
break;
}
case 6:
{
if (asc == 0x28 && ascq == 0)
printf("[CDROM] Description: NOT READY TO READY CHANGE, MEDIUM MAY HAVE CHANGED\n");
break;
}
default:
break;
}
fflush(stdout);
}
#endif
#if defined(_WIN32) && !defined(_XBOX)
static int cdrom_send_command_win32(const libretro_vfs_implementation_file *stream, CDROM_CMD_Direction dir, void *buf, size_t len, unsigned char *cmd, size_t cmd_len, unsigned char *sense, size_t sense_len)
{
DWORD ioctl_bytes;
BOOL ioctl_rv;
#ifdef CDROM_DEBUG
clock_t t = clock();
const char *extra = " ";
static unsigned char last_min = 0;
static unsigned char last_sec = 0;
static unsigned char last_frame = 0;
unsigned lba_cur = cdrom_msf_to_lba(last_min, last_sec, last_frame);
unsigned lba_req = cdrom_msf_to_lba(cmd[3], cmd[4], cmd[5]);
#endif
struct sptd_with_sense
{
SCSI_PASS_THROUGH_DIRECT s;
UCHAR sense[128];
} sptd;
memset(&sptd, 0, sizeof(sptd));
sptd.s.Length = sizeof(sptd.s);
sptd.s.CdbLength = cmd_len;
switch (dir)
{
case DIRECTION_IN:
sptd.s.DataIn = SCSI_IOCTL_DATA_IN;
break;
case DIRECTION_OUT:
sptd.s.DataIn = SCSI_IOCTL_DATA_OUT;
break;
case DIRECTION_NONE:
default:
sptd.s.DataIn = SCSI_IOCTL_DATA_UNSPECIFIED;
break;
}
sptd.s.TimeOutValue = 5;
sptd.s.DataBuffer = buf;
sptd.s.DataTransferLength = len;
sptd.s.SenseInfoLength = sizeof(sptd.sense);
sptd.s.SenseInfoOffset = offsetof(struct sptd_with_sense, sense);
memcpy(sptd.s.Cdb, cmd, cmd_len);
ioctl_rv = DeviceIoControl(stream->fh, IOCTL_SCSI_PASS_THROUGH_DIRECT, &sptd,
sizeof(sptd), &sptd, sizeof(sptd), &ioctl_bytes, NULL);
#ifdef CDROM_DEBUG
if (lba_req < lba_cur)
extra = " BACKWARDS SECTOR READ";
else if (lba_req > lba_cur)
extra = " SKIPPED SECTOR READ";
if (cmd[0] == 0xB9)
{
double time_taken = (double)(((clock() - t) * 1000) / CLOCKS_PER_SEC);
printf("time taken %f ms for DT received length %ld of %" PRId64 " for %02d:%02d:%02d to %02d:%02d:%02d%s req %d cur %d cur_lba %d\n", time_taken, sptd.s.DataTransferLength, len, cmd[3], cmd[4], cmd[5], cmd[6], cmd[7], cmd[8], extra, lba_req, lba_cur, stream->cdrom.cur_lba);
fflush(stdout);
}
last_min = cmd[3];
last_sec = cmd[4];
last_frame = cmd[5];
increment_msf(&last_min, &last_sec, &last_frame);
#endif
if (!ioctl_rv || sptd.s.ScsiStatus != 0)
return 1;
return 0;
}
#endif
#if defined(__linux__) && !defined(ANDROID)
static int cdrom_send_command_linux(const libretro_vfs_implementation_file *stream, CDROM_CMD_Direction dir, void *buf, size_t len, unsigned char *cmd, size_t cmd_len, unsigned char *sense, size_t sense_len)
{
sg_io_hdr_t sgio = {0};
int rv;
switch (dir)
{
case DIRECTION_IN:
sgio.dxfer_direction = SG_DXFER_FROM_DEV;
break;
case DIRECTION_OUT:
sgio.dxfer_direction = SG_DXFER_TO_DEV;
break;
case DIRECTION_NONE:
default:
sgio.dxfer_direction = SG_DXFER_NONE;
break;
}
sgio.interface_id = 'S';
sgio.cmd_len = cmd_len;
sgio.cmdp = cmd;
sgio.dxferp = buf;
sgio.dxfer_len = len;
sgio.sbp = sense;
sgio.mx_sb_len = sense_len;
sgio.timeout = 5000;
rv = ioctl(fileno(stream->fp), SG_IO, &sgio);
if (rv == -1 || sgio.info & SG_INFO_CHECK)
return 1;
return 0;
}
#endif
static int cdrom_send_command(libretro_vfs_implementation_file *stream, CDROM_CMD_Direction dir, void *buf, size_t len, unsigned char *cmd, size_t cmd_len, size_t skip)
{
unsigned char *xfer_buf = NULL;
unsigned char *xfer_buf_pos = xfer_buf;
unsigned char sense[CDROM_MAX_SENSE_BYTES] = {0};
unsigned char retries_left = CDROM_MAX_RETRIES;
int i, rv = 0;
int frames = 1;
size_t padded_req_bytes;
size_t copied_bytes = 0;
bool read_cd = false;
if (!cmd || cmd_len == 0)
return 1;
if (cmd[0] == 0xBE || cmd[0] == 0xB9)
{
frames = ceil((len + skip) / 2352.0);
padded_req_bytes = 2352 * frames;
read_cd = true;
/* these will be incremented below */
cmd[6] = cmd[3];
cmd[7] = cmd[4];
cmd[8] = cmd[5];
}
else
{
padded_req_bytes = len + skip;
}
xfer_buf = (unsigned char*)memalign_alloc(4096, padded_req_bytes);
xfer_buf_pos = xfer_buf;
if (!xfer_buf)
return 1;
memset(xfer_buf, 0, padded_req_bytes);
#ifdef CDROM_DEBUG
printf("Number of frames to read: %d\n", frames);
fflush(stdout);
#endif
for (i = 0; i < frames; i++)
{
size_t request_len = padded_req_bytes;
size_t copy_len = request_len;
bool cached_read = false;
if (read_cd)
{
unsigned lba_req = 0;
request_len = 2352;
copy_len = request_len;
increment_msf(&cmd[6], &cmd[7], &cmd[8]);
if (i > 0)
{
skip = 0;
increment_msf(&cmd[3], &cmd[4], &cmd[5]);
}
else
{
if (skip)
copy_len -= skip;
}
if (i == frames - 1)
{
copy_len = len - copied_bytes;
}
lba_req = cdrom_msf_to_lba(cmd[3], cmd[4], cmd[5]);
if (stream->cdrom.last_frame_valid && lba_req == stream->cdrom.last_frame_lba)
{
/* use cached frame */
cached_read = true;
#ifdef CDROM_DEBUG
printf("[CDROM] Using cached frame\n");
fflush(stdout);
#endif
/* assumes request_len is always equal to the size of last_frame */
memcpy(xfer_buf_pos, stream->cdrom.last_frame, sizeof(stream->cdrom.last_frame));
}
}
#ifdef CDROM_DEBUG
if (!cached_read)
{
unsigned j;
printf("[CDROM] Send Command: ");
for (j = 0; j < cmd_len / sizeof(*cmd); j++)
{
printf("%02X ", cmd[j]);
}
if (len)
printf("(buffer of size %" PRId64 " with skip bytes %" PRId64 " padded to %" PRId64 "), frame %d\n", len, skip, padded_req_bytes, i);
else
printf("\n");
fflush(stdout);
}
#endif
retry:
#if defined(__linux__) && !defined(ANDROID)
if (cached_read || !cdrom_send_command_linux(stream, dir, xfer_buf_pos, request_len, cmd, cmd_len, sense, sizeof(sense)))
#else
#if defined(_WIN32) && !defined(_XBOX)
if (cached_read || !cdrom_send_command_win32(stream, dir, xfer_buf_pos, request_len, cmd, cmd_len, sense, sizeof(sense)))
#endif
#endif
{
rv = 0;
if (buf)
{
#if 0
printf("offsetting %" PRId64 " from buf, copying at xfer_buf offset %" PRId64 ", copying %" PRId64 " bytes\n", copied_bytes, (xfer_buf_pos + skip) - xfer_buf, copy_len);
fflush(stdout);
#endif
memcpy((char*)buf + copied_bytes, xfer_buf_pos + skip, copy_len);
copied_bytes += copy_len;
if (read_cd && !cached_read && request_len >= 2352)
{
unsigned frame_end = cdrom_msf_to_lba(cmd[6], cmd[7], cmd[8]);
/* cache the last received frame */
memcpy(stream->cdrom.last_frame, xfer_buf_pos, sizeof(stream->cdrom.last_frame));
stream->cdrom.last_frame_valid = true;
/* the ending frame is never actually read, so what we really just read is the one right before that */
stream->cdrom.last_frame_lba = frame_end - 1;
}
else
stream->cdrom.last_frame_valid = false;
#if 0
printf("Frame %d, adding %" PRId64 " to buf_pos, is now %" PRId64 ". skip is %" PRId64 "\n", i, request_len, (xfer_buf_pos + request_len) - xfer_buf, skip);
fflush(stdout);
#endif
xfer_buf_pos += request_len;
}
}
else
{
#ifdef CDROM_DEBUG
cdrom_print_sense_data(sense, sizeof(sense));
#endif
/* INQUIRY/TEST/SENSE should never fail, don't retry. */
/* READ ATIP seems to fail outright on some drives with pressed discs, skip retries. */
if (cmd[0] != 0x0 && cmd[0] != 0x12 && cmd[0] != 0x5A && !(cmd[0] == 0x43 && cmd[2] == 0x4))
{
unsigned char key = sense[2] & 0xF;
switch (key)
{
case 0:
case 2:
case 3:
case 4:
case 6:
if (retries_left)
{
#ifdef CDROM_DEBUG
printf("[CDROM] Read Retry...\n");
fflush(stdout);
#endif
retries_left--;
retro_sleep(1000);
goto retry;
}
else
{
rv = 1;
#ifdef CDROM_DEBUG
printf("[CDROM] Read retries failed, giving up.\n");
fflush(stdout);
#endif
}
break;
default:
break;
}
}
rv = 1;
}
}
if (xfer_buf)
memalign_free(xfer_buf);
return rv;
}
static const char* get_profile(unsigned short profile)
{
switch (profile)
{
case 2:
return "Removable disk";
break;
case 8:
return "CD-ROM";
break;
case 9:
return "CD-R";
break;
case 0xA:
return "CD-RW";
break;
case 0x10:
return "DVD-ROM";
break;
case 0x11:
return "DVD-R Sequential Recording";
break;
case 0x12:
return "DVD-RAM";
break;
case 0x13:
return "DVD-RW Restricted Overwrite";
break;
case 0x14:
return "DVD-RW Sequential recording";
break;
case 0x15:
return "DVD-R Dual Layer Sequential Recording";
break;
case 0x16:
return "DVD-R Dual Layer Jump Recording";
break;
case 0x17:
return "DVD-RW Dual Layer";
break;
case 0x1A:
return "DVD+RW";
break;
case 0x1B:
return "DVD+R";
break;
case 0x2A:
return "DVD+RW Dual Layer";
break;
case 0x2B:
return "DVD+R Dual Layer";
break;
case 0x40:
return "BD-ROM";
break;
case 0x41:
return "BD-R SRM";
break;
case 0x42:
return "BD-R RRM";
break;
case 0x43:
return "BD-RE";
break;
case 0x50:
return "HD DVD-ROM";
break;
case 0x51:
return "HD DVD-R";
break;
case 0x52:
return "HD DVD-RAM";
break;
case 0x53:
return "HD DVD-RW";
break;
case 0x58:
return "HD DVD-R Dual Layer";
break;
case 0x5A:
return "HD DVD-RW Dual Layer";
break;
default:
break;
}
return "Unknown";
}
int cdrom_get_sense(libretro_vfs_implementation_file *stream, unsigned char *sense, size_t len)
{
unsigned char cdb[] = {0x3, 0, 0, 0, 0xFC, 0};
unsigned char buf[0xFC] = {0};
int rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
#ifdef CDROM_DEBUG
printf("[CDROM] get sense data status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return 1;
#ifdef CDROM_DEBUG
cdrom_print_sense_data(buf, sizeof(buf));
#endif
return 0;
}
void cdrom_get_current_config_random_readable(libretro_vfs_implementation_file *stream)
{
unsigned char cdb[] = {0x46, 0x2, 0, 0x10, 0, 0, 0, 0, 0x14, 0};
unsigned char buf[0x14] = {0};
int rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
int i;
printf("[CDROM] get current config random readable status code %d\n", rv);
if (rv)
return;
printf("[CDROM] Feature Header: ");
for (i = 0; i < 8; i++)
{
printf("%02X ", buf[i]);
}
printf("\n");
printf("[CDROM] Random Readable Feature Descriptor: ");
for (i = 0; i < 12; i++)
{
printf("%02X ", buf[8 + i]);
}
printf("\n");
printf("[CDROM] Supported commands: READ CAPACITY, READ (10)\n");
}
void cdrom_get_current_config_multiread(libretro_vfs_implementation_file *stream)
{
unsigned char cdb[] = {0x46, 0x2, 0, 0x1D, 0, 0, 0, 0, 0xC, 0};
unsigned char buf[0xC] = {0};
int rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
int i;
printf("[CDROM] get current config multi-read status code %d\n", rv);
if (rv)
return;
printf("[CDROM] Feature Header: ");
for (i = 0; i < 8; i++)
{
printf("%02X ", buf[i]);
}
printf("\n");
printf("[CDROM] Multi-Read Feature Descriptor: ");
for (i = 0; i < 4; i++)
{
printf("%02X ", buf[8 + i]);
}
printf("\n");
printf("[CDROM] Supported commands: READ (10), READ CD, READ DISC INFORMATION, READ TRACK INFORMATION\n");
}
void cdrom_get_current_config_cdread(libretro_vfs_implementation_file *stream)
{
unsigned char cdb[] = {0x46, 0x2, 0, 0x1E, 0, 0, 0, 0, 0x10, 0};
unsigned char buf[0x10] = {0};
int rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
int i;
printf("[CDROM] get current config cd read status code %d\n", rv);
if (rv)
return;
printf("[CDROM] Feature Header: ");
for (i = 0; i < 8; i++)
{
printf("%02X ", buf[i]);
}
printf("\n");
printf("[CDROM] CD Read Feature Descriptor: ");
for (i = 0; i < 8; i++)
{
printf("%02X ", buf[8 + i]);
}
if (buf[8 + 2] & 1)
printf("(current)\n");
printf("[CDROM] Supported commands: READ CD, READ CD MSF, READ TOC/PMA/ATIP\n");
}
void cdrom_get_current_config_profiles(libretro_vfs_implementation_file *stream)
{
unsigned char cdb[] = {0x46, 0x2, 0, 0x0, 0, 0, 0, 0xFF, 0xFA, 0};
unsigned char buf[0xFFFA] = {0};
int rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
int i;
printf("[CDROM] get current config profiles status code %d\n", rv);
if (rv)
return;
printf("[CDROM] Feature Header: ");
for (i = 0; i < 8; i++)
{
printf("%02X ", buf[i]);
}
printf("\n");
printf("[CDROM] Profile List Descriptor: ");
for (i = 0; i < 4; i++)
{
printf("%02X ", buf[8 + i]);
}
printf("\n");
printf("[CDROM] Number of profiles: %u\n", buf[8 + 3] / 4);
for (i = 0; i < buf[8 + 3] / 4; i++)
{
unsigned short profile = (buf[8 + (4 * (i + 1))] << 8) | buf[8 + (4 * (i + 1)) + 1];
printf("[CDROM] Profile Number: %04X (%s) ", profile, get_profile(profile));
if (buf[8 + (4 * (i + 1)) + 2] & 1)
printf("(current)\n");
else
printf("\n");
}
}
void cdrom_get_current_config_core(libretro_vfs_implementation_file *stream)
{
unsigned char cdb[] = {0x46, 0x2, 0, 0x1, 0, 0, 0, 0, 0x14, 0};
unsigned char buf[20] = {0};
unsigned intf_std = 0;
int rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
int i;
const char *intf_std_name = "Unknown";
printf("[CDROM] get current config core status code %d\n", rv);
if (rv)
return;
printf("[CDROM] Feature Header: ");
for (i = 0; i < 8; i++)
{
printf("%02X ", buf[i]);
}
printf("\n");
if (buf[6] == 0 && buf[7] == 8)
printf("[CDROM] Current Profile: CD-ROM\n");
else
printf("[CDROM] Current Profile: %02X%02X\n", buf[6], buf[7]);
printf("[CDROM] Core Feature Descriptor: ");
for (i = 0; i < 12; i++)
{
printf("%02X ", buf[8 + i]);
}
printf("\n");
intf_std = buf[8 + 4] << 24 | buf[8 + 5] << 16 | buf[8 + 6] << 8 | buf[8 + 7];
switch (intf_std)
{
case 0:
intf_std_name = "Unspecified";
break;
case 1:
intf_std_name = "SCSI Family";
break;
case 2:
intf_std_name = "ATAPI";
break;
case 7:
intf_std_name = "Serial ATAPI";
break;
case 8:
intf_std_name = "USB";
break;
default:
break;
}
printf("[CDROM] Physical Interface Standard: %u (%s)\n", intf_std, intf_std_name);
}
int cdrom_read_subq(libretro_vfs_implementation_file *stream, unsigned char *buf, size_t len)
{
/* MMC Command: READ TOC/PMA/ATIP */
unsigned char cdb[] = {0x43, 0x2, 0x2, 0, 0, 0, 0x1, 0x9, 0x30, 0};
#ifdef CDROM_DEBUG
unsigned short data_len = 0;
unsigned char first_session = 0;
unsigned char last_session = 0;
int i;
#endif
int rv;
if (!buf)
return 1;
rv = cdrom_send_command(stream, DIRECTION_IN, buf, len, cdb, sizeof(cdb), 0);
if (rv)
return 1;
#ifdef CDROM_DEBUG
data_len = buf[0] << 8 | buf[1];
first_session = buf[2];
last_session = buf[3];
printf("[CDROM] Data Length: %d\n", data_len);
printf("[CDROM] First Session: %d\n", first_session);
printf("[CDROM] Last Session: %d\n", last_session);
for (i = 0; i < (data_len - 2) / 11; i++)
{
unsigned char session_num = buf[4 + (i * 11) + 0];
unsigned char adr = (buf[4 + (i * 11) + 1] >> 4) & 0xF;
/*unsigned char control = buf[4 + (i * 11) + 1] & 0xF;*/
unsigned char tno = buf[4 + (i * 11) + 2];
unsigned char point = buf[4 + (i * 11) + 3];
unsigned char pmin = buf[4 + (i * 11) + 8];
unsigned char psec = buf[4 + (i * 11) + 9];
unsigned char pframe = buf[4 + (i * 11) + 10];
/*printf("i %d control %d adr %d tno %d point %d: ", i, control, adr, tno, point);*/
/* why is control always 0? */
if (/*(control == 4 || control == 6) && */adr == 1 && tno == 0 && point >= 1 && point <= 99)
{
printf("[CDROM] - Session#: %d TNO %d POINT %d ", session_num, tno, point);
printf("Track start time: (aMSF %02u:%02u:%02u) ", (unsigned)pmin, (unsigned)psec, (unsigned)pframe);
}
else if (/*(control == 4 || control == 6) && */adr == 1 && tno == 0 && point == 0xA0)
{
printf("[CDROM] - Session#: %d TNO %d POINT %d ", session_num, tno, point);
printf("First Track Number: %d ", pmin);
printf("Disc Type: %d ", psec);
}
else if (/*(control == 4 || control == 6) && */adr == 1 && tno == 0 && point == 0xA1)
{
printf("[CDROM] - Session#: %d TNO %d POINT %d ", session_num, tno, point);
printf("Last Track Number: %d ", pmin);
}
else if (/*(control == 4 || control == 6) && */adr == 1 && tno == 0 && point == 0xA2)
{
printf("[CDROM] - Session#: %d TNO %d POINT %d ", session_num, tno, point);
printf("Lead-out start time: (aMSF %02u:%02u:%02u) ", (unsigned)pmin, (unsigned)psec, (unsigned)pframe);
}
printf("\n");
}
fflush(stdout);
#endif
return 0;
}
static int cdrom_read_track_info(libretro_vfs_implementation_file *stream, unsigned char track, cdrom_toc_t *toc)
{
/* MMC Command: READ TRACK INFORMATION */
unsigned char cdb[] = {0x52, 0x1, 0, 0, 0, 0, 0, 0x1, 0x80, 0};
unsigned char buf[384] = {0};
unsigned lba = 0;
unsigned track_size = 0;
int rv;
ssize_t pregap_lba_len;
cdb[5] = track;
rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
if (rv)
return 1;
memcpy(&lba, buf + 8, 4);
memcpy(&track_size, buf + 24, 4);
lba = swap_if_little32(lba);
track_size = swap_if_little32(track_size);
/* lba_start may be earlier than the MSF start times seen in read_subq */
toc->track[track - 1].lba_start = lba;
toc->track[track - 1].track_size = track_size;
pregap_lba_len = (toc->track[track - 1].audio ? 0 : (toc->track[track - 1].lba - toc->track[track - 1].lba_start));
toc->track[track - 1].track_bytes = (track_size - pregap_lba_len) * 2352;
toc->track[track - 1].mode = buf[6] & 0xF;
#ifdef CDROM_DEBUG
printf("[CDROM] Track %d Info: ", track);
printf("Copy: %d ", (buf[5] & 0x10) > 0);
printf("Data Mode: %d ", toc->track[track - 1].mode);
printf("LBA Start: %d (%d) ", lba, toc->track[track - 1].lba);
printf("Track Size: %d\n", track_size);
fflush(stdout);
#endif
return 0;
}
int cdrom_set_read_speed(libretro_vfs_implementation_file *stream, unsigned speed)
{
/* MMC Command: SET CD SPEED */
unsigned char cmd[] = {0xBB, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
cmd[2] = (speed >> 24) & 0xFF;
cmd[3] = (speed >> 16) & 0xFF;
cmd[4] = (speed >> 8) & 0xFF;
cmd[5] = speed & 0xFF;
return cdrom_send_command(stream, DIRECTION_NONE, NULL, 0, cmd, sizeof(cmd), 0);
}
int cdrom_write_cue(libretro_vfs_implementation_file *stream, char **out_buf, size_t *out_len, char cdrom_drive, unsigned char *num_tracks, cdrom_toc_t *toc)
{
unsigned char buf[2352] = {0};
unsigned short data_len = 0;
size_t len = 0;
size_t pos = 0;
int rv = 0;
int i;
if (!out_buf || !out_len || !num_tracks || !toc)
{
#ifdef CDROM_DEBUG
printf("[CDROM] Invalid buffer/length pointer for CDROM cue sheet\n");
fflush(stdout);
#endif
return 1;
}
cdrom_set_read_speed(stream, 0xFFFFFFFF);
rv = cdrom_read_subq(stream, buf, sizeof(buf));
if (rv)
return rv;
data_len = buf[0] << 8 | buf[1];
for (i = 0; i < (data_len - 2) / 11; i++)
{
unsigned char adr = (buf[4 + (i * 11) + 1] >> 4) & 0xF;
unsigned char tno = buf[4 + (i * 11) + 2];
unsigned char point = buf[4 + (i * 11) + 3];
unsigned char pmin = buf[4 + (i * 11) + 8];
if (/*(control == 4 || control == 6) && */adr == 1 && tno == 0 && point == 0xA1)
{
*num_tracks = pmin;
#ifdef CDROM_DEBUG
printf("[CDROM] Number of CDROM tracks: %d\n", *num_tracks);
fflush(stdout);
#endif
break;
}
}
if (!*num_tracks || *num_tracks > 99)
{
#ifdef CDROM_DEBUG
printf("[CDROM] Invalid number of CDROM tracks: %d\n", *num_tracks);
fflush(stdout);
#endif
return 1;
}
len = CDROM_CUE_TRACK_BYTES * (*num_tracks);
toc->num_tracks = *num_tracks;
*out_buf = (char*)calloc(1, len);
*out_len = len;
for (i = 0; i < (data_len - 2) / 11; i++)
{
/*unsigned char session_num = buf[4 + (i * 11) + 0];*/
unsigned char adr = (buf[4 + (i * 11) + 1] >> 4) & 0xF;
unsigned char control = buf[4 + (i * 11) + 1] & 0xF;
unsigned char tno = buf[4 + (i * 11) + 2];
unsigned char point = buf[4 + (i * 11) + 3];
/*unsigned char amin = buf[4 + (i * 11) + 4];
unsigned char asec = buf[4 + (i * 11) + 5];
unsigned char aframe = buf[4 + (i * 11) + 6];*/
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 = cdrom_msf_to_lba(pmin, psec, pframe);
/*printf("i %d control %d adr %d tno %d point %d: amin %d asec %d aframe %d pmin %d psec %d pframe %d\n", i, control, adr, tno, point, amin, asec, aframe, pmin, psec, pframe);*/
/* why is control always 0? */
if (/*(control == 4 || control == 6) && */adr == 1 && tno == 0 && point >= 1 && point <= 99)
{
bool audio = false;
const char *track_type = "MODE1/2352";
audio = (!(control & 0x4) && !(control & 0x5));
#ifdef CDROM_DEBUG
printf("[CDROM] Track %02d CONTROL %01X ADR %01X AUDIO? %d\n", point, control, adr, audio);
fflush(stdout);
#endif
toc->track[point - 1].track_num = point;
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].audio = audio;
cdrom_read_track_info(stream, point, toc);
if (audio)
track_type = "AUDIO";
else if (toc->track[point - 1].mode == 1)
track_type = "MODE1/2352";
else if (toc->track[point - 1].mode == 2)
track_type = "MODE2/2352";
#if defined(_WIN32) && !defined(_XBOX)
pos += snprintf(*out_buf + pos, len - pos, "FILE \"cdrom://%c:/drive-track%02d.bin\" BINARY\n", cdrom_drive, point);
#else
pos += snprintf(*out_buf + pos, len - pos, "FILE \"cdrom://drive%c-track%02d.bin\" BINARY\n", cdrom_drive, point);
#endif
pos += snprintf(*out_buf + pos, len - pos, " TRACK %02d %s\n", point, track_type);
{
unsigned pregap_lba_len = toc->track[point - 1].lba - toc->track[point - 1].lba_start;
if (toc->track[point - 1].audio && pregap_lba_len > 0)
{
unsigned char min = 0;
unsigned char sec = 0;
unsigned char frame = 0;
cdrom_lba_to_msf(pregap_lba_len, &min, &sec, &frame);
pos += snprintf(*out_buf + pos, len - pos, " INDEX 00 00:00:00\n");
pos += snprintf(*out_buf + pos, len - pos, " INDEX 01 %02u:%02u:%02u\n", (unsigned)min, (unsigned)sec, (unsigned)frame);
}
else
pos += snprintf(*out_buf + pos, len - pos, " INDEX 01 00:00:00\n");
}
}
}
return 0;
}
/* needs 32 bytes for full vendor, product and version */
int cdrom_get_inquiry(libretro_vfs_implementation_file *stream, char *model, int len, bool *is_cdrom)
{
/* MMC Command: INQUIRY */
unsigned char cdb[] = {0x12, 0, 0, 0, 0xff, 0};
unsigned char buf[256] = {0};
int rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
bool cdrom = false;
if (rv)
return 1;
if (model && len >= 32)
{
memset(model, 0, len);
/* vendor */
memcpy(model, buf + 8, 8);
model[8] = ' ';
/* product */
memcpy(model + 9, buf + 16, 16);
model[25] = ' ';
/* version */
memcpy(model + 26, buf + 32, 4);
}
cdrom = (buf[0] == 5);
if (is_cdrom && cdrom)
*is_cdrom = true;
#ifdef CDROM_DEBUG
printf("[CDROM] Device Model: %s (is CD-ROM? %s)\n", model, (cdrom ? "yes" : "no"));
#endif
return 0;
}
int cdrom_read(libretro_vfs_implementation_file *stream, cdrom_group_timeouts_t *timeouts, unsigned char min, unsigned char sec, unsigned char frame, void *s, size_t len, size_t skip)
{
/* MMC Command: READ CD MSF */
unsigned char cdb[] = {0xB9, 0, 0, 0, 0, 0, 0, 0, 0, 0xF8, 0, 0};
int rv;
double frames = ceil((len + skip) / 2352.0);
unsigned frame_end = cdrom_msf_to_lba(min, sec, frame) + frames;
cdb[3] = min;
cdb[4] = sec;
cdb[5] = frame;
if (frames <= 1)
{
cdrom_lba_to_msf(frame_end, &cdb[6], &cdb[7], &cdb[8]);
#ifdef CDROM_DEBUG
printf("[CDROM] single-frame read: %d %d %d skip %" PRId64 "\n", cdb[3], cdb[4], cdb[5], skip);
fflush(stdout);
#endif
}
else
{
cdrom_lba_to_msf(frame_end, &cdb[6], &cdb[7], &cdb[8]);
#ifdef CDROM_DEBUG
printf("[CDROM] multi-frame read: %d sectors starting from %02d:%02d:%02d skip %" PRId64 "\n", (int)frames, cdb[3], cdb[4], cdb[5], skip);
fflush(stdout);
#endif
}
/* regardless of the length specified here, a new buffer will be allocated and padded to a sector multiple inside cdrom_send_command */
rv = cdrom_send_command(stream, DIRECTION_IN, s, len, cdb, sizeof(cdb), skip);
#ifdef CDROM_DEBUG
printf("[CDROM] read msf status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
{
stream->cdrom.last_frame_valid = false;
return 1;
}
return 0;
}
int cdrom_stop(libretro_vfs_implementation_file *stream)
{
/* MMC Command: START STOP UNIT */
unsigned char cdb[] = {0x1B, 0, 0, 0, 0x0, 0};
int rv = cdrom_send_command(stream, DIRECTION_NONE, NULL, 0, cdb, sizeof(cdb), 0);
#ifdef CDROM_DEBUG
printf("[CDROM] stop status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return 1;
return 0;
}
int cdrom_unlock(libretro_vfs_implementation_file *stream)
{
/* MMC Command: PREVENT ALLOW MEDIUM REMOVAL */
unsigned char cdb[] = {0x1E, 0, 0, 0, 0x2, 0};
int rv = cdrom_send_command(stream, DIRECTION_NONE, NULL, 0, cdb, sizeof(cdb), 0);
#ifdef CDROM_DEBUG
printf("[CDROM] persistent prevent clear status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return 1;
cdb[4] = 0x0;
rv = cdrom_send_command(stream, DIRECTION_NONE, NULL, 0, cdb, sizeof(cdb), 0);
#ifdef CDROM_DEBUG
printf("[CDROM] prevent clear status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return 1;
return 0;
}
int cdrom_open_tray(libretro_vfs_implementation_file *stream)
{
/* MMC Command: START STOP UNIT */
unsigned char cdb[] = {0x1B, 0, 0, 0, 0x2, 0};
int rv;
cdrom_unlock(stream);
cdrom_stop(stream);
rv = cdrom_send_command(stream, DIRECTION_NONE, NULL, 0, cdb, sizeof(cdb), 0);
#ifdef CDROM_DEBUG
printf("[CDROM] open tray status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return 1;
return 0;
}
int cdrom_close_tray(libretro_vfs_implementation_file *stream)
{
/* MMC Command: START STOP UNIT */
unsigned char cdb[] = {0x1B, 0, 0, 0, 0x3, 0};
int rv = cdrom_send_command(stream, DIRECTION_NONE, NULL, 0, cdb, sizeof(cdb), 0);
#ifdef CDROM_DEBUG
printf("[CDROM] close tray status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return 1;
return 0;
}
struct string_list* cdrom_get_available_drives(void)
{
struct string_list *list = string_list_new();
#if defined(__linux__) && !defined(ANDROID)
struct string_list *dir_list = dir_list_new("/dev", NULL, false, false, false, false);
int i;
bool found = false;
if (!dir_list)
return list;
for (i = 0; i < (int)dir_list->size; i++)
{
if (string_starts_with_size(dir_list->elems[i].data, "/dev/sg",
STRLEN_CONST("/dev/sg")))
{
libretro_vfs_implementation_file *stream;
char drive_model[32] = {0};
char drive_string[33] = {0};
union string_list_elem_attr attr = {0};
int dev_index = 0;
RFILE *file = filestream_open(
dir_list->elems[i].data, RETRO_VFS_FILE_ACCESS_READ, 0);
bool is_cdrom = false;
found = true;
if (!file)
{
#ifdef CDROM_DEBUG
printf("[CDROM] Could not open %s, please check permissions.\n", dir_list->elems[i].data);
fflush(stdout);
#endif
continue;
}
stream = filestream_get_vfs_handle(file);
cdrom_get_inquiry(stream, drive_model, sizeof(drive_model), &is_cdrom);
filestream_close(file);
if (!is_cdrom)
continue;
sscanf(dir_list->elems[i].data + STRLEN_CONST("/dev/sg"),
"%d", &dev_index);
dev_index = '0' + dev_index;
attr.i = dev_index;
if (!string_is_empty(drive_model))
strlcat(drive_string, drive_model, sizeof(drive_string));
else
strlcat(drive_string, "Unknown Drive", sizeof(drive_string));
string_list_append(list, drive_string, attr);
}
}
if (!found)
{
char *buf = NULL;
int64_t len = 0;
if (filestream_read_file("/proc/modules", (void**)&buf, &len))
{
#ifdef CDROM_DEBUG
bool found = false;
#endif
struct string_list mods = {0};
string_list_initialize(&mods);
if (string_split_noalloc(&mods, buf, "\n"))
{
for (i = 0; i < mods.size; i++)
{
if (strcasestr(mods.elems[i].data, "sg "))
{
#ifdef CDROM_DEBUG
found = true;
#endif
break;
}
}
}
string_list_deinitialize(&mods);
free(buf);
#ifdef CDROM_DEBUG
if (found)
{
printf("[CDROM] No sg devices found but kernel module is loaded.\n");
fflush(stdout);
}
else
{
printf("[CDROM] No sg devices found and sg kernel module is not loaded.\n");
fflush(stdout);
}
#endif
}
#ifdef CDROM_DEBUG
else
{
printf("[CDROM] No sg devices found, could not check if sg kernel module is loaded.\n");
fflush(stdout);
}
#endif
}
string_list_free(dir_list);
#endif
#if defined(_WIN32) && !defined(_XBOX)
DWORD drive_mask = GetLogicalDrives();
int i;
for (i = 0; i < sizeof(DWORD) * 8; i++)
{
char path[] = {"a:\\"};
char cdrom_path[] = {"cdrom://a:/drive-track01.bin"};
path[0] += i;
cdrom_path[8] += i;
/* this drive letter doesn't exist */
if (!(drive_mask & (1 << i)))
continue;
if (GetDriveType(path) != DRIVE_CDROM)
continue;
else
{
char drive_model[32] = {0};
char drive_string[33] = {0};
union string_list_elem_attr attr = {0};
RFILE *file = filestream_open(cdrom_path, RETRO_VFS_FILE_ACCESS_READ, 0);
libretro_vfs_implementation_file *stream;
bool is_cdrom = false;
if (!file)
continue;
stream = filestream_get_vfs_handle(file);
cdrom_get_inquiry(stream, drive_model, sizeof(drive_model), &is_cdrom);
filestream_close(file);
if (!is_cdrom)
continue;
attr.i = path[0];
if (!string_is_empty(drive_model))
strlcat(drive_string, drive_model, sizeof(drive_string));
else
strlcat(drive_string, "Unknown Drive", sizeof(drive_string));
string_list_append(list, drive_string, attr);
}
}
#endif
return list;
}
bool cdrom_is_media_inserted(libretro_vfs_implementation_file *stream)
{
/* MMC Command: TEST UNIT READY */
unsigned char cdb[] = {0x00, 0, 0, 0, 0, 0};
int rv = cdrom_send_command(stream, DIRECTION_NONE, NULL, 0, cdb, sizeof(cdb), 0);
#ifdef CDROM_DEBUG
printf("[CDROM] media inserted status code %d\n", rv);
fflush(stdout);
#endif
/* Will also return false if the drive is simply not ready yet (tray open, disc spinning back up after tray closed etc).
* Command will not block or wait for media to become ready. */
if (rv)
return false;
return true;
}
bool cdrom_drive_has_media(const char drive)
{
RFILE *file;
char cdrom_path_bin[256] = {0};
cdrom_device_fillpath(cdrom_path_bin, sizeof(cdrom_path_bin), drive, 1, false);
file = filestream_open(cdrom_path_bin, RETRO_VFS_FILE_ACCESS_READ, 0);
if (file)
{
libretro_vfs_implementation_file *stream = filestream_get_vfs_handle(file);
bool has_media = false;
has_media = cdrom_is_media_inserted(stream);
filestream_close(file);
return has_media;
}
return false;
}
bool cdrom_set_read_cache(libretro_vfs_implementation_file *stream, bool enabled)
{
/* MMC Command: MODE SENSE (10) and MODE SELECT (10) */
unsigned char cdb_sense_changeable[] = {0x5A, 0, 0x48, 0, 0, 0, 0, 0, 0x14, 0};
unsigned char cdb_sense[] = {0x5A, 0, 0x8, 0, 0, 0, 0, 0, 0x14, 0};
unsigned char cdb_select[] = {0x55, 0x10, 0, 0, 0, 0, 0, 0, 0x14, 0};
unsigned char buf[20] = {0};
int rv, i;
rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb_sense_changeable, sizeof(cdb_sense_changeable), 0);
#ifdef CDROM_DEBUG
printf("[CDROM] mode sense changeable status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return false;
if (!(buf[10] & 0x1))
{
/* RCD (read cache disable) bit is not changeable */
#ifdef CDROM_DEBUG
printf("[CDROM] RCD (read cache disable) bit is not changeable.\n");
fflush(stdout);
#endif
return false;
}
memset(buf, 0, sizeof(buf));
rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb_sense, sizeof(cdb_sense), 0);
#ifdef CDROM_DEBUG
printf("mode sense status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return false;
#ifdef CDROM_DEBUG
printf("Mode sense data for caching mode page: ");
for (i = 0; i < (int)sizeof(buf); i++)
{
printf("%02X ", buf[i]);
}
printf("\n");
fflush(stdout);
#endif
/* "When transferred during execution of the MODE SELECT (10) command, Mode Data Length is reserved." */
for (i = 0; i < 8; i++)
buf[i] = 0;
if (enabled)
buf[10] &= ~1;
else
buf[10] |= 1;
rv = cdrom_send_command(stream, DIRECTION_OUT, buf, sizeof(buf), cdb_select, sizeof(cdb_select), 0);
#ifdef CDROM_DEBUG
printf("mode select status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return false;
return true;
}
bool cdrom_get_timeouts(libretro_vfs_implementation_file *stream, cdrom_group_timeouts_t *timeouts)
{
/* MMC Command: MODE SENSE (10) */
int rv;
unsigned char cdb[] = {0x5A, 0, 0x1D, 0, 0, 0, 0, 0, 0x14, 0};
unsigned char buf[20] = {0};
unsigned short g1 = 0;
unsigned short g2 = 0;
unsigned short g3 = 0;
if (!timeouts)
return false;
rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
#ifdef CDROM_DEBUG
printf("get timeouts status code %d\n", rv);
fflush(stdout);
#endif
if (rv)
return false;
g1 = buf[14] << 8 | buf[15];
g2 = buf[16] << 8 | buf[17];
g3 = buf[18] << 8 | buf[19];
#ifdef CDROM_DEBUG
{
int i;
printf("Mode sense data for timeout groups: ");
for (i = 0; i < (int)sizeof(buf); i++)
{
printf("%02X ", buf[i]);
}
printf("\n");
printf("Group 1 Timeout: %d\n", g1);
printf("Group 2 Timeout: %d\n", g2);
printf("Group 3 Timeout: %d\n", g3);
fflush(stdout);
}
#endif
timeouts->g1_timeout = g1;
timeouts->g2_timeout = g2;
timeouts->g3_timeout = g3;
return true;
}
bool cdrom_has_atip(libretro_vfs_implementation_file *stream)
{
/* MMC Command: READ TOC/PMA/ATIP */
unsigned char cdb[] = {0x43, 0x2, 0x4, 0, 0, 0, 0, 0x9, 0x30, 0};
unsigned char buf[32] = {0};
unsigned short atip_len = 0;
int rv = cdrom_send_command(stream, DIRECTION_IN, buf, sizeof(buf), cdb, sizeof(cdb), 0);
if (rv)
return false;
atip_len = buf[0] << 8 | buf[1];
#ifdef CDROM_DEBUG
printf("ATIP Length %d, Disc Type %d, Disc Sub-Type %d\n", atip_len, (buf[6] >> 6) & 0x1, ((buf[6] >> 5) & 0x1) << 2 | ((buf[6] >> 4) & 0x1) << 1 | ((buf[6] >> 3) & 0x1) << 0);
#endif
if (atip_len < 5)
return false;
return true;
}
void cdrom_device_fillpath(char *path, size_t len, char drive, unsigned char track, bool is_cue)
{
size_t pos = 0;
if (!path || len == 0)
return;
if (is_cue)
{
#ifdef _WIN32
pos = strlcpy(path, "cdrom://", len);
if (len > pos)
path[pos++] = drive;
pos = strlcat(path, ":/drive.cue", len);
#else
#ifdef __linux__
pos = strlcpy(path, "cdrom://drive", len);
if (len > pos + 1)
{
path[pos++] = drive;
path[pos] = '\0';
}
pos = strlcat(path, ".cue", len);
#endif
#endif
}
else
{
#ifdef _WIN32
pos = strlcpy(path, "cdrom://", len);
if (len > pos + 1)
{
path[pos++] = drive;
path[pos] = '\0';
}
pos += snprintf(path + pos, len - pos, ":/drive-track%02d.bin", track);
#else
#ifdef __linux__
pos = strlcpy(path, "cdrom://drive", len);
if (len > pos)
path[pos++] = drive;
pos += snprintf(path + pos, len - pos, "-track%02d.bin", track);
#endif
#endif
}
}
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