mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-06 07:38:05 -04:00
Merge from libretro/master:7ff457f for repo synchronization
This commit is contained in:
kub
parent
45d0add214
commit
a5085db3ea
19 changed files with 1015 additions and 311 deletions
140
pico/media.c
140
pico/media.c
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@ -31,35 +31,50 @@ static void get_ext(const char *file, char *ext)
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strlwr_(ext);
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}
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static int detect_media(const char *fname)
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static int detect_media(const char *fname, const unsigned char *rom, unsigned int romsize)
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{
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static const short sms_offsets[] = { 0x7ff0, 0x3ff0, 0x1ff0 };
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static const char *sms_exts[] = { "sms", "gg", "sg" };
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static const char *md_exts[] = { "gen", "smd", "md" };
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static const char *pico_exts[] = { "pco" };
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char buff0[512], buff[32];
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unsigned short *d16;
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pm_file *pmf;
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char ext[5];
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unsigned short *d16 = NULL;
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pm_file *pmf = NULL;
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const char *ext_ptr = NULL;
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char ext[8];
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int i;
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get_ext(fname, ext);
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ext[0] = '\0';
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if ((ext_ptr = strrchr(fname, '.'))) {
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strncpy(ext, ext_ptr + 1, sizeof(ext));
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ext[sizeof(ext) - 1] = '\0';
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}
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// detect wrong extensions
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if (!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) // s.gz ~ .mds.gz
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if (!strcmp(ext, "srm") || !strcmp(ext, "gz")) // s.gz ~ .mds.gz
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return PM_BAD_DETECT;
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/* don't believe in extensions, except .cue */
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if (strcasecmp(ext, ".cue") == 0 || strcasecmp(ext, ".chd") == 0)
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/* don't believe in extensions, except .cue and .chd */
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if (strcasecmp(ext, "cue") == 0 || strcasecmp(ext, "chd") == 0)
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return PM_CD;
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pmf = pm_open(fname);
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if (pmf == NULL)
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return PM_BAD_DETECT;
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/* Open rom file, if required */
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if (!rom) {
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pmf = pm_open(fname);
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if (pmf == NULL)
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return PM_BAD_DETECT;
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romsize = pmf->size;
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}
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if (pm_read(buff0, 512, pmf) != 512) {
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pm_close(pmf);
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return PM_BAD_DETECT;
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if (!rom) {
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if (pm_read(buff0, 512, pmf) != 512) {
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pm_close(pmf);
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return PM_BAD_DETECT;
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}
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} else {
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if (romsize < 512)
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return PM_BAD_DETECT;
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memcpy(buff0, rom, 512);
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}
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if (strncasecmp("SEGADISCSYSTEM", buff0 + 0x00, 14) == 0 ||
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@ -69,32 +84,53 @@ static int detect_media(const char *fname)
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}
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/* check for SMD evil */
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if (pmf->size >= 0x4200 && (pmf->size & 0x3fff) == 0x200) {
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if (pm_seek(pmf, sms_offsets[0] + 0x200, SEEK_SET) == sms_offsets[0] + 0x200 &&
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pm_read(buff, 16, pmf) == 16 &&
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strncmp("TMR SEGA", buff, 8) == 0)
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if (romsize >= 0x4200 && (romsize & 0x3fff) == 0x200) {
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buff[0] = '\0';
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if (!rom) {
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if (pm_seek(pmf, sms_offsets[0] + 0x200, SEEK_SET) == sms_offsets[0] + 0x200)
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pm_read(buff, 16, pmf);
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} else {
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if (romsize >= sms_offsets[0] + 0x200 + 16)
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memcpy(buff, rom + sms_offsets[0] + 0x200, 16);
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}
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if (strncmp("TMR SEGA", buff, 8) == 0)
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goto looks_like_sms;
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/* could parse further but don't bother */
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goto extension_check;
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}
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if (pm_seek(pmf, 0x100, SEEK_SET) == 0x100 && pm_read(buff, 16, pmf) == 16) {
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/* PICO header? Almost always appropriately marked */
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buff[16] = '\0';
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if (strstr(buff, " PICO "))
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goto looks_like_pico;
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/* MD header? Act as TMSS BIOS here */
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if (strncmp(buff, "SEGA", 4) == 0 || strncmp(buff, " SEG", 4) == 0)
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goto looks_like_md;
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/* fetch header info */
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memset(buff, '\0', 17);
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if (!rom) {
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if (pm_seek(pmf, 0x100, SEEK_SET) == 0x100)
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pm_read(buff, 16, pmf);
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} else {
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if (romsize >= 0x100 + 16)
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memcpy(buff, rom + 0x100, 16);
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}
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/* PICO header? Almost always appropriately marked */
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if (strstr(buff, " PICO "))
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goto looks_like_pico;
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/* MD header? Act as TMSS BIOS here */
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if (strncmp(buff, "SEGA", 4) == 0 || strncmp(buff, " SEG", 4) == 0)
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goto looks_like_md;
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for (i = 0; i < ARRAY_SIZE(sms_offsets); i++) {
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if (pm_seek(pmf, sms_offsets[i], SEEK_SET) != sms_offsets[i])
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continue;
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if (!rom) {
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if (pm_seek(pmf, sms_offsets[i], SEEK_SET) != sms_offsets[i])
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continue;
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if (pm_read(buff, 16, pmf) != 16)
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continue;
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if (pm_read(buff, 16, pmf) != 16)
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continue;
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} else {
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if (romsize < sms_offsets[i] + 16)
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continue;
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memcpy(buff, rom + sms_offsets[i], 16);
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}
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if (strncmp("TMR SEGA", buff, 8) == 0)
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goto looks_like_sms;
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@ -103,20 +139,20 @@ static int detect_media(const char *fname)
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extension_check:
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/* probably some headerless thing. Maybe check the extension after all. */
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for (i = 0; i < ARRAY_SIZE(md_exts); i++)
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if (strcasecmp(pmf->ext, md_exts[i]) == 0)
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if (strcasecmp(ext, md_exts[i]) == 0)
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goto looks_like_md;
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for (i = 0; i < ARRAY_SIZE(sms_exts); i++)
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if (strcasecmp(pmf->ext, sms_exts[i]) == 0)
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if (strcasecmp(ext, sms_exts[i]) == 0)
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goto looks_like_sms;
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for (i = 0; i < ARRAY_SIZE(pico_exts); i++)
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if (strcasecmp(pmf->ext, pico_exts[i]) == 0)
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if (strcasecmp(ext, pico_exts[i]) == 0)
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goto looks_like_pico;
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/* If everything else fails, make a guess on the reset vector */
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d16 = (unsigned short *)(buff0 + 4);
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if ((((d16[0] << 16) | d16[1]) & 0xffffff) >= pmf->size) {
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if ((((d16[0] << 16) | d16[1]) & 0xffffff) >= romsize) {
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lprintf("bad MD reset vector, assuming SMS\n");
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goto looks_like_sms;
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}
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@ -215,6 +251,7 @@ int PicoCdCheck(const char *fname_in, int *pregion)
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}
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enum media_type_e PicoLoadMedia(const char *filename,
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const unsigned char *rom, unsigned int romsize,
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const char *carthw_cfg_fname,
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const char *(*get_bios_filename)(int *region, const char *cd_fname),
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void (*do_region_override)(const char *media_filename))
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@ -222,13 +259,13 @@ enum media_type_e PicoLoadMedia(const char *filename,
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const char *rom_fname = filename;
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enum media_type_e media_type;
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enum cd_track_type cd_img_type = CT_UNKNOWN;
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pm_file *rom_file = NULL;
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unsigned char *rom_data = NULL;
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unsigned int rom_size = 0;
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pm_file *rom = NULL;
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int cd_region = 0;
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int ret;
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media_type = detect_media(filename);
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media_type = detect_media(filename, rom, romsize);
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if (media_type == PM_BAD_DETECT)
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goto out;
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@ -267,14 +304,16 @@ enum media_type_e PicoLoadMedia(const char *filename,
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PicoIn.AHW = PAHW_PICO;
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}
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rom = pm_open(rom_fname);
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if (rom == NULL) {
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lprintf("Failed to open ROM\n");
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media_type = PM_ERROR;
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goto out;
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if (!rom) {
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rom_file = pm_open(rom_fname);
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if (rom_file == NULL) {
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lprintf("Failed to open ROM\n");
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media_type = PM_ERROR;
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goto out;
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}
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}
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ret = PicoCartLoad(rom, &rom_data, &rom_size, (PicoIn.AHW & PAHW_SMS) ? 1 : 0);
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ret = PicoCartLoad(rom_file, rom, romsize, &rom_data, &rom_size, (PicoIn.AHW & PAHW_SMS) ? 1 : 0);
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if (ret != 0) {
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if (ret == 2) lprintf("Out of memory\n");
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else if (ret == 3) lprintf("Read failed\n");
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@ -314,10 +353,19 @@ enum media_type_e PicoLoadMedia(const char *filename,
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// simple test for GG. Do this here since m.hardware is nulled in Insert
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if ((PicoIn.AHW & PAHW_SMS) && !PicoIn.hwSelect) {
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if (!strcmp(rom->ext,"gg")) {
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const char *ext = NULL;
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if (rom_file && rom_file->ext && (*rom_file->ext != '\0')) {
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ext = rom_file->ext;
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}
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else if ((ext = strrchr(filename, '.'))) {
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if (*(++ext) == '\0') {
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ext = NULL;
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}
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}
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if (ext && !strcmp(ext,"gg") && !PicoIn.hwSelect) {
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Pico.m.hardware |= PMS_HW_GG;
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lprintf("detected GG ROM\n");
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} else if (!strcmp(rom->ext,"sg")) {
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} else if (ext && !strcmp(ext,"sg")) {
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Pico.m.hardware |= PMS_HW_SG;
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lprintf("detected SG-1000 ROM\n");
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} else
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@ -340,8 +388,8 @@ enum media_type_e PicoLoadMedia(const char *filename,
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PicoSetInputDevice(0, PICO_INPUT_PAD_6BTN);
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out:
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if (rom)
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pm_close(rom);
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if (rom_file)
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pm_close(rom_file);
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if (rom_data)
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free(rom_data);
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return media_type;
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