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Add alternative PS1 detect game code by aliaspider

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This commit is contained in:
twinaphex 2015-09-26 00:05:15 +02:00
parent 1e15f8b3bf
commit 8c87f0bd31
1 changed files with 90 additions and 0 deletions
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90
tasks/task_database_cue.c
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@ -125,6 +125,95 @@ static int find_token(RFILE *fd, const char *token)
return 0;
}
#if 1
static int detect_ps1_game_sub(const char *track_path, char *game_id, int sub_channel_mixed)
{
uint8_t* tmp;
uint8_t buffer[2048 * 2];
int skip, frame_size, is_mode1, cd_sector;
RFILE *fp = retro_fopen(track_path, RFILE_MODE_READ, -1);
if (!fp)
return 0;
is_mode1 = 0;
retro_fseek(fp, 0, SEEK_END);
if (!sub_channel_mixed)
{
if (!(retro_ftell(fp) & 0x7FF))
{
unsigned int mode_test = 0;
retro_fseek(fp, 0, SEEK_SET);
retro_fread(fp, &mode_test, 4);
#if defined(MSB_FIRST)
if (mode_test != 0x00ffffff)
#else
if (mode_test != 0xffffff00)
#endif
is_mode1 = 1;
}
}
skip = is_mode1? 0: 24;
frame_size = sub_channel_mixed? 2448: is_mode1? 2048: 2352;
retro_fseek(fp, 156 + skip + 16 * frame_size, SEEK_SET);
retro_fread(fp, buffer, 6);
cd_sector = buffer[2] | (buffer[3] << 8) | (buffer[4] << 16);
retro_fseek(fp, skip + cd_sector * frame_size, SEEK_SET);
retro_fread(fp, buffer, 2048 * 2);
tmp = buffer;
while (tmp < (buffer + 2048 * 2))
{
if (!*tmp)
return 0;
if (!strncasecmp((const char*)(tmp + 33), "SYSTEM.CNF;1", 12))
break;
tmp += *tmp;
}
cd_sector = tmp[2] | (tmp[3] << 8) | (tmp[4] << 16);
retro_fseek(fp, 14 + skip + cd_sector * frame_size, SEEK_SET);
retro_fread(fp, buffer, 256);
tmp = (uint8_t*)strrchr((const char*)buffer, '\\');
if(!tmp)
tmp = buffer;
else
tmp++;
*game_id++ = *tmp++;
*game_id++ = *tmp++;
*game_id++ = *tmp++;
*game_id++ = *tmp++;
*game_id++ = '-';
tmp++;
*game_id++ = *tmp++;
*game_id++ = *tmp++;
*game_id++ = *tmp++;
tmp++;
*game_id++ = *tmp++;
*game_id++ = *tmp++;
*game_id = 0;
retro_fclose(fp);
return 1;
}
int detect_ps1_game(const char *track_path, char *game_id)
{
if (detect_ps1_game_sub(track_path, game_id, 0))
return 1;
return detect_ps1_game_sub(track_path, game_id, 1);
}
#else
int detect_ps1_game(const char *track_path, char *game_id)
{
bool rv = false;
@ -175,6 +264,7 @@ int detect_ps1_game(const char *track_path, char *game_id)
retro_fclose(fd);
return rv;
}
#endif
int detect_system(const char *track_path, int32_t offset,
const char **system_name)