mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-19 18:05:52 +01:00
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* EXST - from Sony games [Shadow of the Colossus (PS2), Gacha Mecha Stadium Saru Battle (PS2)] */
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VGMSTREAM * init_vgmstream_ps2_exst(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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STREAMFILE * streamBody = NULL;
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off_t start_offset;
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int loop_flag, channel_count;
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size_t block_size, num_blocks, loop_start_block;
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/* checks */
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/* .sts+int: main [Shadow of the Colossus (PS2)] (some .sts have manually joined header+body)
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* .x: header+body [Ape Escape 3 (PS2)] */
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if (!check_extensions(streamFile, "sts,x"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x45585354) /* "EXST" */
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goto fail;
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streamBody = open_streamfile_by_ext(streamFile,"int");
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if (!streamBody) {
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/* data+body joined */
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start_offset = 0x78;
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if (get_streamfile_size(streamFile) < start_offset)
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goto fail;
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}
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else {
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/* body is separate */
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start_offset = 0x00;
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}
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channel_count = read_16bitLE(0x06,streamFile);
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loop_flag = read_32bitLE(0x0C,streamFile) == 1;
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loop_start_block = read_32bitLE(0x10,streamFile);
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num_blocks = read_32bitLE(0x14,streamFile);
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count,loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->sample_rate = read_32bitLE(0x08,streamFile);
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vgmstream->meta_type = meta_PS2_EXST;
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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x400;
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block_size = vgmstream->interleave_block_size * vgmstream->channels;
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vgmstream->num_samples = ps_bytes_to_samples(num_blocks*block_size, channel_count);
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if (vgmstream->loop_flag) {
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vgmstream->loop_start_sample = ps_bytes_to_samples(loop_start_block*block_size, channel_count);;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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if (!vgmstream_open_stream(vgmstream,streamBody ? streamBody : streamFile,start_offset))
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goto fail;
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close_streamfile(streamBody);
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return vgmstream;
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fail:
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close_streamfile(streamBody);
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close_vgmstream(vgmstream);
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return NULL;
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}
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