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Minor Ogg Vorbis cleanup

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This commit is contained in:
bnnm 2018-05-19 11:24:20 +02:00
parent 883e018aab
commit f1f165a815
1 changed files with 23 additions and 42 deletions
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65
src/meta/ogg_vorbis.c
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@ -223,17 +223,14 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
int is_ogg = 0;
int is_um3 = 0;
int is_kovs = 0;
int is_psychic = 0;
int is_sngw = 0;
int is_isd = 0;
int is_l2sd = 0;
int is_rpgmvo = 0;
int is_eno = 0;
int is_ys8 = 0;
/* check extension */
/* .ogg: standard/psychic, .logg: renamed for plugins,
/* .ogg: standard/various, .logg: renamed for plugins,
* .adx: KID [Remember11 (PC)],
* .rof: The Rhythm of Fighters (Mobile)
* .acm: Planescape Torment Enhanced Edition (PC) */
@ -255,22 +252,26 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
goto fail;
}
/* check standard Ogg Vorbis */
/* check standard Ogg Vorbis and variations */
if (is_ogg) {
if (read_32bitBE(0x00,streamFile) == 0x2c444430) { /* Psychic Software obfuscation [Darkwind: War on Wheels (PC)] */
is_psychic = 1;
if (read_32bitBE(0x00,streamFile) == 0x2c444430) { /* Psychic Software [Darkwind: War on Wheels (PC)] */
ovmi.decryption_callback = psychic_ogg_decryption_callback;
ovmi.meta_type = meta_OGG_PSYCHIC;
}
else if (read_32bitBE(0x00,streamFile) == 0x4C325344) { /* "L2SD" [Lineage II Chronicle 4 (PC)] */
is_l2sd = 1;
ovmi.decryption_callback = l2sd_ogg_decryption_callback;
ovmi.meta_type = meta_OGG_L2SD;
}
else if (read_32bitBE(0x00,streamFile) == 0x048686C5) { /* XOR'ed + bitswapped "OggS" [Ys VIII (PC)] */
is_ys8 = 1;
ovmi.xor_value = 0xF0;
ovmi.decryption_callback = ys8_ogg_decryption_callback;
ovmi.meta_type = meta_OGG_YS8;
}
else if (read_32bitBE(0x00,streamFile) != 0x4f676753) { /* "OggS" */
goto fail; /* unknown/not ogg (ex. Wwise) */
else if (read_32bitBE(0x00,streamFile) == 0x4f676753) { /* "OggS" */
ovmi.meta_type = meta_OGG_VORBIS;
}
else {
goto fail; /* unknown/not Ogg Vorbis (ex. Wwise) */
}
}
@ -279,9 +280,10 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
if (read_32bitBE(0x00,streamFile) != 0x4f676753) { /* "OggS" */
ovmi.decryption_callback = um3_ogg_decryption_callback;
}
ovmi.meta_type = meta_OGG_UM3;
}
/* check KOVS (Koei Tecmo games), encrypted and has an actual header */
/* check KOVS (Koei Tecmo games), header + encrypted */
if (is_kovs) {
if (read_32bitBE(0x00,streamFile) != 0x4b4f5653) { /* "KOVS" */
goto fail;
@ -289,6 +291,7 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
ovmi.loop_start = read_32bitLE(0x08,streamFile);
ovmi.loop_flag = (ovmi.loop_start != 0);
ovmi.decryption_callback = kovs_ogg_decryption_callback;
ovmi.meta_type = meta_OGG_KOVS;
start_offset = 0x20;
}
@ -299,11 +302,13 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
ovmi.xor_value = read_32bitBE(0x00,streamFile);
ovmi.decryption_callback = sngw_ogg_decryption_callback;
}
ovmi.meta_type = meta_OGG_SNGW;
}
/* check ISD (Gunvolt PC) */
/* check ISD [Gunvolt (PC)], encrypted */
if (is_isd) {
ovmi.decryption_callback = isd_ogg_decryption_callback;
ovmi.meta_type = meta_OGG_ISD;
//todo looping unknown, not in Ogg comments
// game has sound/GV_steam.* files with info about sound/stream/*.isd
@ -314,52 +319,28 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
// 0x0c(2): PCM block size, 0x0e(2): PCM bps, 0x10: null, 0x18: samples (in PCM bytes)
}
/* check RPGMKVO (RPG Maker MV), header + minor encryption */
/* check RPGMKVO [RPG Maker MV (PC)], header + partially encrypted */
if (is_rpgmvo) {
if (read_32bitBE(0x00,streamFile) != 0x5250474D && /* "RPGM" */
read_32bitBE(0x00,streamFile) != 0x56000000) { /* "V\0\0\0" */
goto fail;
}
ovmi.decryption_callback = rpgmvo_ogg_decryption_callback;
ovmi.meta_type = meta_OGG_RPGMV;
start_offset = 0x10;
}
/* check ENO [Metronomicon (PC)] */
/* check ENO [Metronomicon (PC)], key + encrypted */
if (is_eno) {
/* first byte probably derives into xor key, but this works too */
ovmi.xor_value = read_8bit(0x05,streamFile); /* always zero = easy key */
ovmi.decryption_callback = eno_ogg_decryption_callback;
ovmi.meta_type = meta_OGG_ENO;
start_offset = 0x01;
}
/* check Ys VIII (PC) */
if (is_ys8) {
ovmi.xor_value = 0xF0;
ovmi.decryption_callback = ys8_ogg_decryption_callback;
}
if (is_um3) {
ovmi.meta_type = meta_OGG_UM3;
} else if (is_kovs) {
ovmi.meta_type = meta_OGG_KOVS;
} else if (is_psychic) {
ovmi.meta_type = meta_OGG_PSYCHIC;
} else if (is_sngw) {
ovmi.meta_type = meta_OGG_SNGW;
} else if (is_isd) {
ovmi.meta_type = meta_OGG_ISD;
} else if (is_l2sd) {
ovmi.meta_type = meta_OGG_L2SD;
} else if (is_rpgmvo) {
ovmi.meta_type = meta_OGG_RPGMV;
} else if (is_eno) {
ovmi.meta_type = meta_OGG_ENO;
} else if (is_ys8) {
ovmi.meta_type = meta_OGG_YS8;
} else {
ovmi.meta_type = meta_OGG_VORBIS;
}
return init_vgmstream_ogg_vorbis_callbacks(streamFile, NULL, start_offset, &ovmi);