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libretro-common/vfs/vfs_implementation_cdrom.c
twinaphex 21dd3538d4 Resync
2020-06-26 20:00:53 +02:00

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/* Copyright (C) 2010-2020 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (vfs_implementation_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.
*/
#include <vfs/vfs_implementation.h>
#include <file/file_path.h>
#include <compat/fopen_utf8.h>
#include <string/stdstring.h>
#include <cdrom/cdrom.h>
#if defined(_WIN32) && !defined(_XBOX)
#include <windows.h>
#endif
/* TODO/FIXME - static global variable */
static cdrom_toc_t vfs_cdrom_toc = {0};
const cdrom_toc_t* retro_vfs_file_get_cdrom_toc(void)
{
return &vfs_cdrom_toc;
}
int64_t retro_vfs_file_seek_cdrom(
libretro_vfs_implementation_file *stream,
int64_t offset, int whence)
{
const char *ext = path_get_extension(stream->orig_path);
if (string_is_equal_noncase(ext, "cue"))
{
switch (whence)
{
case SEEK_SET:
stream->cdrom.byte_pos = offset;
break;
case SEEK_CUR:
stream->cdrom.byte_pos += offset;
break;
case SEEK_END:
stream->cdrom.byte_pos = (stream->cdrom.cue_len - 1) + offset;
break;
}
#ifdef CDROM_DEBUG
printf("[CDROM] Seek: Path %s Offset %" PRIu64 " is now at %" PRIu64 "\n",
stream->orig_path,
offset,
stream->cdrom.byte_pos);
fflush(stdout);
#endif
}
else if (string_is_equal_noncase(ext, "bin"))
{
int lba = (offset / 2352);
unsigned char min = 0;
unsigned char sec = 0;
unsigned char frame = 0;
#ifdef CDROM_DEBUG
const char *seek_type = "SEEK_SET";
#endif
switch (whence)
{
case SEEK_CUR:
{
unsigned new_lba;
#ifdef CDROM_DEBUG
seek_type = "SEEK_CUR";
#endif
stream->cdrom.byte_pos += offset;
new_lba = vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba + (stream->cdrom.byte_pos / 2352);
cdrom_lba_to_msf(new_lba, &min, &sec, &frame);
}
break;
case SEEK_END:
{
ssize_t pregap_lba_len = (vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].audio
? 0
: (vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba - vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba_start));
ssize_t lba_len = vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].track_size - pregap_lba_len;
#ifdef CDROM_DEBUG
seek_type = "SEEK_END";
#endif
cdrom_lba_to_msf(lba_len + lba, &min, &sec, &frame);
stream->cdrom.byte_pos = lba_len * 2352;
}
break;
case SEEK_SET:
default:
{
#ifdef CDROM_DEBUG
seek_type = "SEEK_SET";
#endif
stream->cdrom.byte_pos = offset;
cdrom_lba_to_msf(vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba + (stream->cdrom.byte_pos / 2352), &min, &sec, &frame);
}
break;
}
stream->cdrom.cur_min = min;
stream->cdrom.cur_sec = sec;
stream->cdrom.cur_frame = frame;
stream->cdrom.cur_lba = cdrom_msf_to_lba(min, sec, frame);
#ifdef CDROM_DEBUG
printf(
"[CDROM] Seek %s: Path %s Offset %" PRIu64 " is now at %" PRIu64 " (MSF %02u:%02u:%02u) (LBA %u)...\n",
seek_type,
stream->orig_path,
offset,
stream->cdrom.byte_pos,
(unsigned)stream->cdrom.cur_min,
(unsigned)stream->cdrom.cur_sec,
(unsigned)stream->cdrom.cur_frame,
stream->cdrom.cur_lba);
fflush(stdout);
#endif
}
else
return -1;
return 0;
}
void retro_vfs_file_open_cdrom(
libretro_vfs_implementation_file *stream,
const char *path, unsigned mode, unsigned hints)
{
#if defined(__linux__) && !defined(ANDROID)
char cdrom_path[] = "/dev/sg1";
size_t path_len = strlen(path);
const char *ext = path_get_extension(path);
stream->cdrom.cur_track = 1;
if ( !string_is_equal_noncase(ext, "cue")
&& !string_is_equal_noncase(ext, "bin"))
return;
if (path_len >= STRLEN_CONST("drive1-track01.bin"))
{
if (!memcmp(path, "drive", STRLEN_CONST("drive")))
{
if (!memcmp(path + 6, "-track", STRLEN_CONST("-track")))
{
if (sscanf(path + 12, "%02u", (unsigned*)&stream->cdrom.cur_track))
{
#ifdef CDROM_DEBUG
printf("[CDROM] Opening track %d\n", stream->cdrom.cur_track);
fflush(stdout);
#endif
}
}
}
}
if (path_len >= STRLEN_CONST("drive1.cue"))
{
if (!memcmp(path, "drive", STRLEN_CONST("drive")))
{
if (path[5] >= '0' && path[5] <= '9')
{
cdrom_path[7] = path[5];
stream->cdrom.drive = path[5];
vfs_cdrom_toc.drive = stream->cdrom.drive;
}
}
}
#ifdef CDROM_DEBUG
printf("[CDROM] Open: Path %s URI %s\n", cdrom_path, path);
fflush(stdout);
#endif
stream->fp = (FILE*)fopen_utf8(cdrom_path, "r+b");
if (!stream->fp)
return;
if (string_is_equal_noncase(ext, "cue"))
{
if (stream->cdrom.cue_buf)
{
free(stream->cdrom.cue_buf);
stream->cdrom.cue_buf = NULL;
}
cdrom_write_cue(stream,
&stream->cdrom.cue_buf,
&stream->cdrom.cue_len,
stream->cdrom.drive,
&vfs_cdrom_toc.num_tracks,
&vfs_cdrom_toc);
cdrom_get_timeouts(stream, &vfs_cdrom_toc.timeouts);
#ifdef CDROM_DEBUG
if (string_is_empty(stream->cdrom.cue_buf))
{
printf("[CDROM] Error writing cue sheet.\n");
fflush(stdout);
}
else
{
printf("[CDROM] CUE Sheet:\n%s\n", stream->cdrom.cue_buf);
fflush(stdout);
}
#endif
}
#endif
#if defined(_WIN32) && !defined(_XBOX)
char cdrom_path[] = "\\\\.\\D:";
size_t path_len = strlen(path);
const char *ext = path_get_extension(path);
if ( !string_is_equal_noncase(ext, "cue")
&& !string_is_equal_noncase(ext, "bin"))
return;
if (path_len >= STRLEN_CONST("d:/drive-track01.bin"))
{
if (!memcmp(path + 1, ":/drive-track", STRLEN_CONST(":/drive-track")))
{
if (sscanf(path + 14, "%02u", (unsigned*)&stream->cdrom.cur_track))
{
#ifdef CDROM_DEBUG
printf("[CDROM] Opening track %d\n", stream->cdrom.cur_track);
fflush(stdout);
#endif
}
}
}
if (path_len >= STRLEN_CONST("d:/drive.cue"))
{
if (!memcmp(path + 1, ":/drive", STRLEN_CONST(":/drive")))
{
if ((path[0] >= 'A' && path[0] <= 'Z') || (path[0] >= 'a' && path[0] <= 'z'))
{
cdrom_path[4] = path[0];
stream->cdrom.drive = path[0];
vfs_cdrom_toc.drive = stream->cdrom.drive;
}
}
}
#ifdef CDROM_DEBUG
printf("[CDROM] Open: Path %s URI %s\n", cdrom_path, path);
fflush(stdout);
#endif
stream->fh = CreateFile(cdrom_path,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (stream->fh == INVALID_HANDLE_VALUE)
return;
if (string_is_equal_noncase(ext, "cue"))
{
if (stream->cdrom.cue_buf)
{
free(stream->cdrom.cue_buf);
stream->cdrom.cue_buf = NULL;
}
cdrom_write_cue(stream,
&stream->cdrom.cue_buf,
&stream->cdrom.cue_len,
stream->cdrom.drive,
&vfs_cdrom_toc.num_tracks,
&vfs_cdrom_toc);
cdrom_get_timeouts(stream,
&vfs_cdrom_toc.timeouts);
#ifdef CDROM_DEBUG
if (string_is_empty(stream->cdrom.cue_buf))
{
printf("[CDROM] Error writing cue sheet.\n");
fflush(stdout);
}
else
{
printf("[CDROM] CUE Sheet:\n%s\n", stream->cdrom.cue_buf);
fflush(stdout);
}
#endif
}
#endif
if (vfs_cdrom_toc.num_tracks > 1 && stream->cdrom.cur_track)
{
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 = cdrom_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 = cdrom_msf_to_lba(stream->cdrom.cur_min, stream->cdrom.cur_sec, stream->cdrom.cur_frame);
}
}
int retro_vfs_file_close_cdrom(libretro_vfs_implementation_file *stream)
{
#ifdef CDROM_DEBUG
printf("[CDROM] Close: Path %s\n", stream->orig_path);
fflush(stdout);
#endif
#if defined(_WIN32) && !defined(_XBOX)
if (!stream->fh || !CloseHandle(stream->fh))
return -1;
#else
if (!stream->fp || fclose(stream->fp))
return -1;
#endif
return 0;
}
int64_t retro_vfs_file_tell_cdrom(libretro_vfs_implementation_file *stream)
{
const char *ext = NULL;
if (!stream)
return -1;
ext = path_get_extension(stream->orig_path);
if (string_is_equal_noncase(ext, "cue"))
{
#ifdef CDROM_DEBUG
printf("[CDROM] (cue) Tell: Path %s Position %" PRIu64 "\n", stream->orig_path, stream->cdrom.byte_pos);
fflush(stdout);
#endif
return stream->cdrom.byte_pos;
}
else if (string_is_equal_noncase(ext, "bin"))
{
#ifdef CDROM_DEBUG
printf("[CDROM] (bin) Tell: Path %s Position %" PRId64 "\n", stream->orig_path, stream->cdrom.byte_pos);
fflush(stdout);
#endif
return stream->cdrom.byte_pos;
}
return -1;
}
int64_t retro_vfs_file_read_cdrom(libretro_vfs_implementation_file *stream,
void *s, uint64_t len)
{
int rv;
const char *ext = path_get_extension(stream->orig_path);
if (string_is_equal_noncase(ext, "cue"))
{
if ((int64_t)len >= (int64_t)stream->cdrom.cue_len
- stream->cdrom.byte_pos)
len = stream->cdrom.cue_len - stream->cdrom.byte_pos - 1;
#ifdef CDROM_DEBUG
printf(
"[CDROM] Read: Reading %" PRIu64 " bytes from cuesheet starting at %" PRIu64 "...\n",
len,
stream->cdrom.byte_pos);
fflush(stdout);
#endif
memcpy(s, stream->cdrom.cue_buf + stream->cdrom.byte_pos, len);
stream->cdrom.byte_pos += len;
return len;
}
else if (string_is_equal_noncase(ext, "bin"))
{
unsigned char min = 0;
unsigned char sec = 0;
unsigned char frame = 0;
unsigned char rmin = 0;
unsigned char rsec = 0;
unsigned char rframe = 0;
size_t skip = stream->cdrom.byte_pos % 2352;
if (stream->cdrom.byte_pos >=
vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].track_bytes)
return 0;
if (stream->cdrom.byte_pos + len >
vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].track_bytes)
len -= (stream->cdrom.byte_pos + len)
- vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].track_bytes;
cdrom_lba_to_msf(stream->cdrom.cur_lba, &min, &sec, &frame);
cdrom_lba_to_msf(stream->cdrom.cur_lba
- vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba,
&rmin, &rsec, &rframe);
#ifdef CDROM_DEBUG
printf(
"[CDROM] Read: Reading %" PRIu64 " bytes from %s starting at byte offset %" PRIu64 " (rMSF %02u:%02u:%02u aMSF %02u:%02u:%02u) (LBA %u) skip %" PRIu64 "...\n",
len,
stream->orig_path,
stream->cdrom.byte_pos,
(unsigned)rmin,
(unsigned)rsec,
(unsigned)rframe,
(unsigned)min,
(unsigned)sec,
(unsigned)frame,
stream->cdrom.cur_lba,
skip);
fflush(stdout);
#endif
#if 1
rv = cdrom_read(stream, &vfs_cdrom_toc.timeouts, min, sec,
frame, s, (size_t)len, skip);
#else
rv = cdrom_read_lba(stream, stream->cdrom.cur_lba, s,
(size_t)len, skip);
#endif
if (rv)
{
#ifdef CDROM_DEBUG
printf("[CDROM] Failed to read %" PRIu64 " bytes from CD.\n", len);
fflush(stdout);
#endif
return 0;
}
stream->cdrom.byte_pos += len;
stream->cdrom.cur_lba =
vfs_cdrom_toc.track[stream->cdrom.cur_track - 1].lba
+ (stream->cdrom.byte_pos / 2352);
cdrom_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 %02u:%02u:%02u) (LBA %u)\n",
len,
stream->cdrom.byte_pos,
(unsigned)stream->cdrom.cur_min,
(unsigned)stream->cdrom.cur_sec,
(unsigned)stream->cdrom.cur_frame,
cdrom_msf_to_lba(
stream->cdrom.cur_min,
stream->cdrom.cur_sec,
stream->cdrom.cur_frame)
);
fflush(stdout);
#endif
return len;
}
return 0;
}
int retro_vfs_file_error_cdrom(libretro_vfs_implementation_file *stream)
{
return 0;
}
const vfs_cdrom_t* retro_vfs_file_get_cdrom_position(
const libretro_vfs_implementation_file *stream)
{
return &stream->cdrom;
}
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