mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 04:14:50 +01:00
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
#include "meta.h"
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#include "../util.h"
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#include "../coding/coding.h"
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#include <string.h>
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static int test_interleave(STREAMFILE* sf, int channels, int interleave);
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/* .s14/.sss - headerless siren14 stream [The Idolm@ster (DS), Korogashi Puzzle Katamari Damacy (DS), Taiko no Tatsujin DS 1/2 (DS)] */
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VGMSTREAM* init_vgmstream_s14_sss(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset = 0;
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int channels, loop_flag = 0, interleave;
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/* check extension */
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if (check_extensions(sf,"sss")) {
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channels = 2;
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} else if (check_extensions(sf,"s14")) {
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channels = 1; /* may have dual _0ch.s14 + _1ch.s14, needs .txtp */
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} else {
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goto fail;
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}
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/* raw siren comes in 3 frame sizes, try to guess the correct one */
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{
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/* horrid but ain't losing sleep over it (besides the header is often incrusted in-code as some tracks loop)
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* Katamari, Taiko = 0x78/0x50, idolmaster=0x3c (usually but can be any) */
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if (test_interleave(sf, channels, 0x78))
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interleave = 0x78;
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else if (test_interleave(sf, channels, 0x50))
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interleave = 0x50;
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else if (test_interleave(sf, channels, 0x3c))
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interleave = 0x3c;
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else
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goto fail;
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}
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels,loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->num_samples = get_streamfile_size(sf) / (interleave * channels) * (32000/50);
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vgmstream->sample_rate = 32768;
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vgmstream->meta_type = channels==1 ? meta_S14 : meta_SSS;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = interleave;
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{
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#ifdef VGM_USE_G7221
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vgmstream->coding_type = coding_G7221C;
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vgmstream->codec_data = init_g7221(vgmstream->channels, vgmstream->interleave_block_size);
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if (!vgmstream->codec_data) goto fail;
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#else
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goto fail;
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#endif
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}
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if (!vgmstream_open_stream(vgmstream, sf, start_offset))
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goto fail;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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/* pretty gross (should use TXTH), but codec info seems to be in hard-to-locate places/exe
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* and varies per file, so for now autodetect possible types. could also check if data_size matches interleave */
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static int test_interleave(STREAMFILE* sf, int channels, int interleave) {
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#ifdef VGM_USE_G7221
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int res;
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g7221_codec_data* data = init_g7221(channels, interleave);
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if (!data) goto fail;
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set_key_g7221(data, NULL); /* force test key */
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/* though this is mainly for key testing, with no key can be used to test frames too */
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res = test_key_g7221(data, 0x00, sf);
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if (res <= 0) goto fail;
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free_g7221(data);
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return 1;
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fail:
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free_g7221(data);
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return 0;
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#else
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return 0;
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#endif
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}
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