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https://github.com/vgmstream/vgmstream.git
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59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* VSF - from Square Enix PS2 games between 2004-2006 [Musashi: Samurai Legend (PS2), Front Mission 5 (PS2)] */
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VGMSTREAM * init_vgmstream_vsf(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channel_count, flags, pitch;
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size_t channel_size, loop_start;
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/* checks */
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/* .vsf: header id and actual extension [Code Age Commanders (PS2)] */
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if (!check_extensions(streamFile, "vsf"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x56534600) /* "VSF\0" */
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goto fail;
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/* 0x04: data size */
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/* 0x08: file number? */
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/* 0x0c: version? (always 0x00010000) */
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channel_size = read_32bitLE(0x10,streamFile) * 0x10;
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/* 0x14: frame size */
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loop_start = read_32bitLE(0x18,streamFile) * 0x10; /* also in channel size */
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flags = read_32bitLE(0x1c,streamFile);
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pitch = read_32bitLE(0x20,streamFile);
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/* 0x24: volume? */
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/* 0x28: ? (may be 0) */
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/* rest is 0xFF */
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channel_count = (flags & (1<<0)) ? 2 : 1;
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loop_flag = (flags & (1<<1));
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start_offset = (flags & (1<<8)) ? 0x80 : 0x800;
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/* flag (1<<4) is common but no apparent differences, no other flags known */
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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 = round10((48000 * pitch) / 4096);
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vgmstream->num_samples = ps_bytes_to_samples(channel_size, 1);
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vgmstream->loop_start_sample = ps_bytes_to_samples(loop_start, 1);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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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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vgmstream->meta_type = meta_VSF;
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if (!vgmstream_open_stream(vgmstream, streamFile, 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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