vgmstream/src/meta/s14_sss.c
2022-07-23 15:14:30 +02:00

90 lines
2.8 KiB
C

#include "meta.h"
#include "../util.h"
#include "../coding/coding.h"
#include <string.h>
static int test_interleave(STREAMFILE* sf, int channels, int interleave);
/* .s14/.sss - headerless siren14 stream [The Idolm@ster (DS), Korogashi Puzzle Katamari Damacy (DS), Taiko no Tatsujin DS 1/2 (DS)] */
VGMSTREAM* init_vgmstream_s14_sss(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
off_t start_offset = 0;
int channels, loop_flag = 0, interleave;
/* check extension */
if (check_extensions(sf,"sss")) {
channels = 2;
} else if (check_extensions(sf,"s14")) {
channels = 1; /* may have dual _0ch.s14 + _1ch.s14, needs .txtp */
} else {
goto fail;
}
/* raw siren comes in 3 frame sizes, try to guess the correct one */
{
/* horrid but ain't losing sleep over it (besides the header is often incrusted in-code as some tracks loop)
* Katamari, Taiko = 0x78/0x50, idolmaster=0x3c (usually but can be any) */
if (test_interleave(sf, channels, 0x78))
interleave = 0x78;
else if (test_interleave(sf, channels, 0x50))
interleave = 0x50;
else if (test_interleave(sf, channels, 0x3c))
interleave = 0x3c;
else
goto fail;
}
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channels,loop_flag);
if (!vgmstream) goto fail;
vgmstream->num_samples = get_streamfile_size(sf) / (interleave * channels) * (32000/50);
vgmstream->sample_rate = 32768;
vgmstream->meta_type = channels==1 ? meta_S14 : meta_SSS;
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = interleave;
{
#ifdef VGM_USE_G7221
vgmstream->coding_type = coding_G7221C;
vgmstream->codec_data = init_g7221(vgmstream->channels, vgmstream->interleave_block_size);
if (!vgmstream->codec_data) goto fail;
#else
goto fail;
#endif
}
if (!vgmstream_open_stream(vgmstream, sf, start_offset))
goto fail;
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
}
/* pretty gross (should use TXTH), but codec info seems to be in hard-to-locate places/exe
* and varies per file, so for now autodetect possible types. could also check if data_size matches interleave */
static int test_interleave(STREAMFILE* sf, int channels, int interleave) {
#ifdef VGM_USE_G7221
int res;
g7221_codec_data* data = init_g7221(channels, interleave);
if (!data) goto fail;
set_key_g7221(data, NULL); /* force test key */
/* though this is mainly for key testing, with no key can be used to test frames too */
res = test_key_g7221(data, 0x00, sf);
if (res <= 0) goto fail;
free_g7221(data);
return 1;
fail:
free_g7221(data);
return 0;
#else
return 0;
#endif
}