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vgmstream/src/meta/ogg_vorbis.c

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#ifdef VGM_USE_VORBIS
#include <stdio.h>
#include <string.h>
#include "meta.h"
#include "../coding/coding.h"
#include "ogg_vorbis_streamfile.h"
static void um3_ogg_decryption_callback(void* ptr, size_t size, size_t nmemb, void* datasource) {
uint8_t *ptr8 = ptr;
size_t bytes_read = size * nmemb;
ogg_vorbis_io *io = datasource;
int i;
/* first 0x800 bytes are xor'd */
if (io->offset < 0x800) {
int num_crypt = 0x800 - io->offset;
if (num_crypt > bytes_read)
num_crypt = bytes_read;
for (i = 0; i < num_crypt; i++)
ptr8[i] ^= 0xff;
}
}
static void kovs_ogg_decryption_callback(void* ptr, size_t size, size_t nmemb, void* datasource) {
uint8_t *ptr8 = ptr;
size_t bytes_read = size * nmemb;
ogg_vorbis_io *io = datasource;
int i;
/* first 0x100 bytes are xor'd */
if (io->offset < 0x100) {
int max_offset = io->offset + bytes_read;
if (max_offset > 0x100)
max_offset = 0x100;
for (i = io->offset; i < max_offset; i++) {
ptr8[i-io->offset] ^= i;
}
}
}
static void psychic_ogg_decryption_callback(void* ptr, size_t size, size_t nmemb, void* datasource) {
static const uint8_t key[6] = {
0x23,0x31,0x20,0x2e,0x2e,0x28
};
uint8_t *ptr8 = ptr;
size_t bytes_read = size * nmemb;
ogg_vorbis_io *io = datasource;
int i;
//todo incorrect, picked value changes (fixed order for all files), or key is bigger
/* bytes add key that changes every 0x64 bytes */
for (i = 0; i < bytes_read; i++) {
int pos = (io->offset + i) / 0x64;
ptr8[i] += key[pos % sizeof(key)];
}
}
static void rpgmvo_ogg_decryption_callback(void* ptr, size_t size, size_t nmemb, void* datasource) {
static const uint8_t header[16] = { /* OggS, packet type, granule, stream id(empty) */
0x4F,0x67,0x67,0x53,0x00,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
uint8_t *ptr8 = ptr;
size_t bytes_read = size*nmemb;
ogg_vorbis_io *io = datasource;
int i;
/* first 0x10 are xor'd, but header can be easily reconstructed
* (key is also in (game)/www/data/System.json "encryptionKey") */
for (i = 0; i < bytes_read; i++) {
if (io->offset+i < 0x10) {
ptr8[i] = header[(io->offset + i) % 16];
/* last two bytes are the stream id, get from next OggS */
if (io->offset+i == 0x0e)
ptr8[i] = read_8bit(0x58, io->streamfile);
if (io->offset+i == 0x0f)
ptr8[i] = read_8bit(0x59, io->streamfile);
}
}
}
static void at4_ogg_decryption_callback(void* ptr, size_t size, size_t nmemb, void* datasource) {
static const uint8_t af4_key[0x10] = {
0x00,0x0E,0x08,0x1E, 0x18,0x37,0x12,0x00, 0x48,0x87,0x46,0x0B, 0x9C,0x68,0xA8,0x4B
};
uint8_t *ptr8 = ptr;
size_t bytes_read = size * nmemb;
ogg_vorbis_io *io = datasource;
int i;
for (i = 0; i < bytes_read; i++) {
ptr8[i] -= af4_key[(io->offset + i) % sizeof(af4_key)];
}
}
static const uint32_t xiph_mappings[] = {
0,
mapping_MONO,
mapping_STEREO,
mapping_2POINT1_xiph,
mapping_QUAD,
mapping_5POINT0_xiph,
mapping_5POINT1,
mapping_7POINT0,
mapping_7POINT1,
};
/* Ogg Vorbis, may contain loop comments */
VGMSTREAM* init_vgmstream_ogg_vorbis(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
STREAMFILE* temp_sf = NULL;
ogg_vorbis_io_config_data cfg = {0};
ogg_vorbis_meta_info_t ovmi = {0};
off_t start_offset = 0;
int is_ogg = 0;
int is_um3 = 0;
int is_kovs = 0;
int is_sngw = 0;
int is_isd = 0;
int is_rpgmvo = 0;
int is_eno = 0;
int is_gwm = 0;
int is_mus = 0;
int is_lse = 0;
int is_bgm = 0;
/* check extension */
/* .ogg: standard/various, .logg: renamed for plugins
* .adx: KID games [Remember11 (PC)]
* .rof: The Rhythm of Fighters (Mobile)
* .acm: Planescape Torment Enhanced Edition (PC)
* .sod: Zone 4 (PC)
* .aif/laif/aif-Loop: Psychonauts (PC) raw extractions (named) */
if (check_extensions(sf,"ogg,logg,adx,rof,acm,sod,aif,laif,aif-Loop")) {
is_ogg = 1;
} else if (check_extensions(sf,"um3")) {
is_um3 = 1;
} else if (check_extensions(sf,"kvs,kovs")) {
/* .kvs: Atelier Sophie (PC), kovs: header id only? */
is_kovs = 1;
} else if (check_extensions(sf,"sngw")) { /* .sngw: Capcom [Devil May Cry 4 SE (PC), Biohazard 6 (PC)] */
is_sngw = 1;
} else if (check_extensions(sf,"isd")) { /* .isd: Inti Creates PC games */
is_isd = 1;
} else if (check_extensions(sf,"rpgmvo")) { /* .rpgmvo: RPG Maker MV games (PC) */
is_rpgmvo = 1;
} else if (check_extensions(sf,"eno")) { /* .eno: Metronomicon (PC) */
is_eno = 1;
} else if (check_extensions(sf,"gwm")) { /* .gwm: Adagio: Cloudburst (PC) */
is_gwm = 1;
} else if (check_extensions(sf,"mus")) { /* .mus: Redux - Dark Matters (PC) */
is_mus = 1;
} else if (check_extensions(sf,"lse")) { /* .lse: Labyrinth of Refrain: Coven of Dusk (PC) */
is_lse = 1;
} else if (check_extensions(sf,"bgm")) { /* .bgm: Fortissimo (PC) */
is_bgm = 1;
} else {
goto fail;
}
if (is_ogg) {
if (read_u32be(0x00,sf) == 0x2c444430) { /* Psychic Software [Darkwind: War on Wheels (PC)] */
ovmi.decryption_callback = psychic_ogg_decryption_callback;
}
else if (read_u32be(0x00,sf) == 0x4C325344) { /* "L2SD" instead of "OggS" [Lineage II Chronicle 4 (PC)] */
cfg.is_header_swap = 1;
cfg.is_encrypted = 1;
}
else if (read_u32be(0x00,sf) == 0x048686C5) { /* "OggS" XOR'ed + bitswapped [Ys VIII (PC)] */
cfg.key[0] = 0xF0;
cfg.key_len = 1;
cfg.is_nibble_swap = 1;
cfg.is_encrypted = 1;
}
else if (read_u32be(0x00,sf) == 0x00000000 && /* null instead of "OggS" [Yuppie Psycho (PC)] */
read_u32be(0x3a,sf) == 0x4F676753) { /* "OggS" in next page */
cfg.is_header_swap = 1;
cfg.is_encrypted = 1;
}
else if (read_u32be(0x00,sf) != 0x4F676753 && /* random(?) swap instead of "OggS" [Tobi Tsukihime (PC)] */
read_u32be(0x3a,sf) == 0x4F676753) { /* "OggS" in next page */
cfg.is_header_swap = 1;
cfg.is_encrypted = 1;
}
else if (read_u32be(0x00,sf) == 0x4F756F71) { /* "OggS" encrypted [Adventure Field 4 (PC)]*/
ovmi.decryption_callback = at4_ogg_decryption_callback;
}
else if (read_u32be(0x00,sf) == 0x4F676753) { /* "OggS" (standard) */
;
}
else {
goto fail; /* unknown/not Ogg Vorbis (ex. Wwise) */
}
}
if (is_um3) { /* ["Ultramarine3" (???)] */
if (read_u32be(0x00,sf) != 0x4f676753) { /* "OggS" (optionally encrypted) */
ovmi.decryption_callback = um3_ogg_decryption_callback;
}
}
if (is_kovs) { /* Koei Tecmo PC games */
if (read_u32be(0x00,sf) != 0x4b4f5653) { /* "KOVS" */
goto fail;
}
ovmi.loop_start = read_32bitLE(0x08,sf);
ovmi.loop_flag = (ovmi.loop_start != 0);
ovmi.decryption_callback = kovs_ogg_decryption_callback;
ovmi.meta_type = meta_OGG_KOVS;
start_offset = 0x20;
}
if (is_sngw) { /* [Capcom's MT Framework PC games] */
if (read_u32be(0x00,sf) != 0x4f676753) { /* "OggS" (optionally encrypted) */
cfg.key_len = read_streamfile(cfg.key, 0x00, 0x04, sf);
cfg.is_header_swap = 1;
cfg.is_nibble_swap = 1;
cfg.is_encrypted = 1;
}
ovmi.disable_reordering = 1; /* must be an MT Framework thing */
}
if (is_isd) { /* Inti Creates PC games */
const char *isl_name = NULL;
/* check various encrypted "OggS" values */
if (read_u32be(0x00,sf) == 0xAF678753) { /* Azure Striker Gunvolt (PC) */
static const uint8_t isd_gv_key[16] = {
0xe0,0x00,0xe0,0x00,0xa0,0x00,0x00,0x00,0xe0,0x00,0xe0,0x80,0x40,0x40,0x40,0x00
};
cfg.key_len = sizeof(isd_gv_key);
memcpy(cfg.key, isd_gv_key, cfg.key_len);
isl_name = "GV_steam.isl";
}
else if (read_u32be(0x00,sf) == 0x0FE787D3) { /* Mighty Gunvolt (PC) */
static const uint8_t isd_mgv_key[120] = {
0x40,0x80,0xE0,0x80,0x40,0x40,0xA0,0x00,0xA0,0x40,0x00,0x80,0x00,0x40,0xA0,0x00,
0xC0,0x40,0xE0,0x00,0x60,0x40,0x80,0x00,0xA0,0x00,0xE0,0x00,0x60,0x40,0xC0,0x00,
0xA0,0x40,0xC0,0x80,0xE0,0x00,0x60,0x00,0x00,0x40,0x00,0x80,0xE0,0x80,0x40,0x00,
0xA0,0x80,0xA0,0x80,0x80,0xC0,0x60,0x00,0xA0,0x00,0xA0,0x80,0x40,0x80,0x60,0x00,
0x40,0xC0,0x20,0x00,0x20,0xC0,0x00,0x00,0x00,0xC0,0x20,0x00,0xC0,0xC0,0x60,0x00,
0xE0,0xC0,0x80,0x80,0x20,0x00,0x60,0x00,0xE0,0xC0,0xC0,0x00,0x20,0xC0,0xC0,0x00,
0x60,0x00,0xE0,0x80,0x00,0xC0,0x00,0x00,0x60,0x80,0x40,0x80,0x20,0x80,0x20,0x00,
0x80,0x40,0xE0,0x00,0x20,0x00,0x20,0x00,
};
cfg.key_len = sizeof(isd_mgv_key);
memcpy(cfg.key, isd_mgv_key, cfg.key_len);
isl_name = "MGV_steam.isl";
}
else if (read_u32be(0x00,sf) == 0x0FA74753) { /* Blaster Master Zero (PC) */
static const uint8_t isd_bmz_key[120] = {
0x40,0xC0,0x20,0x00,0x40,0xC0,0xC0,0x00,0x00,0x80,0xE0,0x80,0x80,0x40,0x20,0x00,
0x60,0xC0,0xC0,0x00,0xA0,0x80,0x60,0x00,0x40,0x40,0x20,0x00,0x60,0x40,0xC0,0x00,
0x60,0x80,0xC0,0x80,0x40,0xC0,0x00,0x00,0xA0,0xC0,0x80,0x80,0x60,0x80,0xA0,0x00,
0x40,0x80,0x60,0x00,0x20,0x00,0xC0,0x00,0x60,0x00,0xA0,0x80,0x40,0x40,0xA0,0x00,
0x40,0x40,0xC0,0x80,0x00,0x80,0x60,0x00,0x80,0xC0,0xA0,0x00,0xE0,0x40,0xC0,0x00,
0x20,0x80,0xE0,0x00,0x40,0xC0,0xA0,0x00,0xE0,0xC0,0xC0,0x80,0xE0,0x80,0xC0,0x00,
0x40,0x40,0x00,0x00,0x20,0x40,0x80,0x00,0xE0,0x80,0x20,0x80,0x40,0x80,0xE0,0x00,
0xA0,0x00,0xC0,0x80,0xE0,0x00,0x20,0x00
};
cfg.key_len = sizeof(isd_bmz_key);
memcpy(cfg.key, isd_bmz_key, cfg.key_len);
isl_name = "output.isl";
}
else {
goto fail;
}
cfg.is_encrypted = 1;
/* .isd have companion files in the prev folder:
* - .ish: constant id/names (not always)
* - .isf: format table, ordered like file id/numbers, 0x18 header with:
* 0x00(2): ?, 0x02(2): channels, 0x04: sample rate, 0x08: skip samples (in PCM bytes), always 32000
* 0x0c(2): PCM block size, 0x0e(2): PCM bps, 0x10: null, 0x18: samples (in PCM bytes)
* - .isl: looping table (encrypted like the files) */
if (isl_name) {
STREAMFILE* islFile = NULL;
islFile = open_streamfile_by_filename(sf, isl_name);
if (!islFile) {
/* try in ../(file) too since that's how the .isl is stored on disc */
char isl_path[PATH_LIMIT];
snprintf(isl_path, sizeof(isl_path), "../%s", isl_name);
islFile = open_streamfile_by_filename(sf, isl_path);
}
if (islFile) {
STREAMFILE* dec_sf = NULL;
dec_sf = setup_ogg_vorbis_streamfile(islFile, cfg);
if (dec_sf) {
off_t loop_offset;
char basename[PATH_LIMIT];
/* has a bunch of tables then a list with file names without extension and loops */
loop_offset = read_32bitLE(0x18, dec_sf);
get_streamfile_basename(sf, basename, sizeof(basename));
while (loop_offset < get_streamfile_size(dec_sf)) {
char testname[0x20];
read_string(testname, sizeof(testname), loop_offset+0x2c, dec_sf);
if (strcmp(basename, testname) == 0) {
ovmi.loop_start = read_32bitLE(loop_offset+0x1c, dec_sf);
ovmi.loop_end = read_32bitLE(loop_offset+0x20, dec_sf);
ovmi.loop_end_found = 1;
ovmi.loop_flag = (ovmi.loop_end != 0);
break;
}
loop_offset += 0x50;
}
close_streamfile(dec_sf);
}
close_streamfile(islFile);
}
}
}
if (is_rpgmvo) { /* [RPG Maker MV (PC)] */
if (read_32bitBE(0x00,sf) != 0x5250474D && /* "RPGM" */
read_32bitBE(0x00,sf) != 0x56000000) { /* "V\0\0\0" */
goto fail;
}
ovmi.decryption_callback = rpgmvo_ogg_decryption_callback;
start_offset = 0x10;
}
if (is_eno) { /* [Metronomicon (PC)] */
/* first byte probably derives into key, but this works too */
cfg.key[0] = (uint8_t)read_8bit(0x05,sf); /* regular ogg have a zero at this offset = easy key */
cfg.key_len = 1;
cfg.is_encrypted = 1;
start_offset = 0x01; /* "OggS" starts after key-thing */
}
if (is_gwm) { /* [Adagio: Cloudburst (PC)] */
cfg.key[0] = 0x5D;
cfg.key_len = 1;
cfg.is_encrypted = 1;
}
if (is_mus) { /* [Redux: Dark Matters (PC)] */
static const uint8_t mus_key[16] = {
0x21,0x4D,0x6F,0x01,0x20,0x4C,0x6E,0x02,0x1F,0x4B,0x6D,0x03,0x20,0x4C,0x6E,0x02
};
cfg.key_len = sizeof(mus_key);
memcpy(cfg.key, mus_key, cfg.key_len);
cfg.is_header_swap = 1; /* decrypted header gives "Mus " */
cfg.is_encrypted = 1;
}
if (is_lse) { /* [Nippon Ichi PC games] */
if (read_32bitBE(0x00,sf) == 0xFFFFFFFF) { /* [Operation Abyss: New Tokyo Legacy (PC)] */
cfg.key[0] = 0xFF;
cfg.key_len = 1;
cfg.is_header_swap = 1;
cfg.is_encrypted = 1;
}
else { /* [Operation Babel: New Tokyo Legacy (PC), Labyrinth of Refrain: Coven of Dusk (PC)] */
int i;
/* found at file_size-1 but this works too (same key for most files but can vary) */
uint8_t base_key = (uint8_t)read_8bit(0x04,sf) - 0x04;
cfg.key_len = 256;
for (i = 0; i < cfg.key_len; i++) {
cfg.key[i] = (uint8_t)(base_key + i);
}
cfg.is_encrypted = 1;
}
}
if (is_bgm) { /* [Fortissimo (PC)] */
size_t file_size = get_streamfile_size(sf);
uint8_t key[0x04];
uint32_t xor_be;
put_32bitLE(key, (uint32_t)file_size);
xor_be = get_u32be(key);
if ((read_32bitBE(0x00,sf) ^ xor_be) == 0x4F676753) { /* "OggS" */
int i;
cfg.key_len = 4;
for (i = 0; i < cfg.key_len; i++) {
cfg.key[i] = key[i];
}
cfg.is_encrypted = 1;
}
}
if (cfg.is_encrypted) {
temp_sf = setup_ogg_vorbis_streamfile(sf, cfg);
if (!temp_sf) goto fail;
}
if (ovmi.meta_type == 0) {
if (cfg.is_encrypted || ovmi.decryption_callback != NULL)
ovmi.meta_type = meta_OGG_encrypted;
else
ovmi.meta_type = meta_OGG_VORBIS;
}
vgmstream = init_vgmstream_ogg_vorbis_callbacks(temp_sf != NULL ? temp_sf : sf, NULL, start_offset, &ovmi);
close_streamfile(temp_sf);
return vgmstream;
fail:
close_streamfile(temp_sf);
return NULL;
}
VGMSTREAM* init_vgmstream_ogg_vorbis_callbacks(STREAMFILE* sf, ov_callbacks* callbacks, off_t start, const ogg_vorbis_meta_info_t *ovmi) {
VGMSTREAM* vgmstream = NULL;
ogg_vorbis_codec_data* data = NULL;
ogg_vorbis_io io = {0};
char name[STREAM_NAME_SIZE] = {0};
int channels, sample_rate, num_samples;
int loop_flag = ovmi->loop_flag;
int32_t loop_start = ovmi->loop_start;
int loop_length_found = ovmi->loop_length_found;
int32_t loop_length = ovmi->loop_length;
int loop_end_found = ovmi->loop_end_found;
int32_t loop_end = ovmi->loop_end;
size_t stream_size = ovmi->stream_size ?
ovmi->stream_size :
get_streamfile_size(sf) - start;
int force_seek = 0;
int disable_reordering = ovmi->disable_reordering;
//todo improve how to pass config
io.decryption_callback = ovmi->decryption_callback;
io.scd_xor = ovmi->scd_xor;
io.scd_xor_length = ovmi->scd_xor_length;
io.xor_value = ovmi->xor_value;
data = init_ogg_vorbis(sf, start, stream_size, &io);
if (!data) goto fail;
ogg_vorbis_get_info(data, &channels, &sample_rate);
ogg_vorbis_get_samples(data, &num_samples); /* let libvorbisfile find total samples */
/* search for loop comments */
{//todo ignore if loop flag already set?
const char* comment = NULL;
while (ogg_vorbis_get_comment(data, &comment)) {
if (strstr(comment,"loop_start=") == comment || /* Phantasy Star Online: Blue Burst (PC) (no loop_end pair) */
strstr(comment,"LOOP_START=") == comment || /* Phantasy Star Online: Blue Burst (PC), common */
strstr(comment,"LOOPPOINT=") == comment || /* Sonic Robo Blast 2 */
strstr(comment,"COMMENT=LOOPPOINT=") == comment ||
strstr(comment,"LOOPSTART=") == comment ||
strstr(comment,"um3.stream.looppoint.start=") == comment ||
strstr(comment,"LOOP_BEGIN=") == comment || /* Hatsune Miku: Project Diva F (PS3) */
strstr(comment,"LoopStart=") == comment || /* Capcom games [Devil May Cry 4 (PC)] */
strstr(comment,"LOOP=") == comment || /* Duke Nukem 3D: 20th Anniversary World Tour */
strstr(comment,"XIPH_CUE_LOOPSTART=") == comment) { /* DeNa games [Super Mario Run (Android), FF Record Keeper (Android)] */
loop_start = atol(strrchr(comment,'=')+1);
loop_flag = (loop_start >= 0);
}
else if (strstr(comment,"LOOPLENGTH=") == comment) {/* (LOOPSTART pair) */
loop_length = atol(strrchr(comment,'=')+1);
loop_length_found = 1;
}
else if (strstr(comment,"title=-lps") == comment) { /* KID [Memories Off #5 (PC), Remember11 (PC)] */
loop_start = atol(comment+10);
loop_flag = (loop_start >= 0);
}
else if (strstr(comment,"album=-lpe") == comment) { /* (title=-lps pair) */
loop_end = atol(comment+10);
loop_end_found = 1;
loop_flag = 1;
}
else if (strstr(comment,"LoopEnd=") == comment) { /* (LoopStart pair) */
loop_end = atol(strrchr(comment,'=')+1);
loop_end_found = 1;
}
else if (strstr(comment,"LOOP_END=") == comment) { /* (LOOP_START/LOOP_BEGIN pair) */
loop_end = atol(strrchr(comment,'=')+1);
loop_end_found = 1;
}
else if (strstr(comment,"lp=") == comment) {
sscanf(strrchr(comment,'=')+1,"%d,%d", &loop_start,&loop_end);
loop_end_found = 1;
loop_flag = 1;
}
else if (strstr(comment,"LOOPDEFS=") == comment) { /* Fairy Fencer F: Advent Dark Force */
sscanf(strrchr(comment,'=')+1,"%d,%d", &loop_start,&loop_end);
loop_flag = 1;
loop_end_found = 1;
}
else if (strstr(comment,"COMMENT=loop(") == comment) { /* Zero Time Dilemma (PC) */
sscanf(strrchr(comment,'(')+1,"%d,%d", &loop_start,&loop_end);
loop_flag = 1;
loop_end_found = 1;
}
else if (strstr(comment, "XIPH_CUE_LOOPEND=") == comment) { /* (XIPH_CUE_LOOPSTART pair) */
loop_end = atol(strrchr(comment, '=') + 1);
loop_end_found = 1;
}
else if (strstr(comment, "omment=") == comment) { /* Air (Android) */
sscanf(strstr(comment, "=LOOPSTART=") + 11, "%d,LOOPEND=%d", &loop_start, &loop_end);
loop_flag = 1;
loop_end_found = 1;
}
else if (strstr(comment,"MarkerNum=0002") == comment) { /* Megaman X Legacy Collection: MMX1/2/3 (PC) flag */
/* uses LoopStart=-1 LoopEnd=-1, then 3 secuential comments: "MarkerNum" + "M=7F(start)" + "M=7F(end)" */
loop_flag = 1;
}
else if (strstr(comment,"M=7F") == comment) { /* Megaman X Legacy Collection: MMX1/2/3 (PC) start/end */
if (loop_flag && loop_start < 0) { /* LoopStart should set as -1 before */
sscanf(comment,"M=7F%x", &loop_start);
}
else if (loop_flag && loop_start >= 0) {
sscanf(comment,"M=7F%x", &loop_end);
loop_end_found = 1;
}
}
else if (strstr(comment,"LOOPMS=") == comment) { /* Sonic Robo Blast 2 (PC) */
loop_start = atol(strrchr(comment,'=')+1) * sample_rate / 1000; /* ms to samples */
loop_flag = (loop_start >= 0);
}
else if (strstr(comment,"COMMENT=- loopTime ") == comment || /* Aristear Remain (PC) */
strstr(comment,"COMMENT=-loopTime ") == comment) { /* Hyakki Ryouran no Yakata x Kawarazaki-ke no Ichizoku (PC) */
loop_start = atol(strrchr(comment,' ')) / 1000.0f * sample_rate; /* ms to samples */
loop_flag = (loop_start >= 0);
/* files have all page granule positions -1 except a few close to loop. This throws off
* libvorbis seeking (that uses granules), so we need manual fix = slower. Could be detected
* by checking granules in the first new OggS pages (other games from the same dev don't use
* loopTime nor have wrong granules though) */
force_seek = 1;
}
/* Hatsune Miku Project DIVA games, though only 'Arcade Future Tone' has >4ch files
* ENCODER tag is common but ogg_vorbis_encode looks unique enough
* (arcade ends with "2010-11-26" while consoles have "2011-02-07" */
if (strstr(comment, "ENCODER=ogg_vorbis_encode/") == comment) {
disable_reordering = 1;
}
if (strstr(comment, "TITLE=") == comment) {
strncpy(name, comment + 6, sizeof(name) - 1);
}
;VGM_LOG("OGG: user_comment=%s\n", comment);
}
}
ogg_vorbis_set_disable_reordering(data, disable_reordering);
ogg_vorbis_set_force_seek(data, force_seek);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channels, loop_flag);
if (!vgmstream) goto fail;
vgmstream->codec_data = data;
vgmstream->coding_type = coding_OGG_VORBIS;
vgmstream->layout_type = layout_none;
vgmstream->meta_type = ovmi->meta_type;
if (!vgmstream->meta_type)
vgmstream->meta_type = meta_OGG_VORBIS;
vgmstream->sample_rate = sample_rate;
vgmstream->stream_size = stream_size;
if (ovmi->total_subsongs) /* not setting it has some effect when showing stream names */
vgmstream->num_streams = ovmi->total_subsongs;
if (name[0] != '\0')
strcpy(vgmstream->stream_name, name);
vgmstream->num_samples = num_samples;
if (loop_flag) {
vgmstream->loop_start_sample = loop_start;
if (loop_length_found)
vgmstream->loop_end_sample = loop_start + loop_length;
else if (loop_end_found)
vgmstream->loop_end_sample = loop_end;
else
vgmstream->loop_end_sample = vgmstream->num_samples;
if (vgmstream->loop_end_sample > vgmstream->num_samples)
vgmstream->loop_end_sample = vgmstream->num_samples;
}
if (vgmstream->channels <= 8) {
vgmstream->channel_layout = xiph_mappings[vgmstream->channels];
}
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
}
#endif
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