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https://github.com/vgmstream/vgmstream.git
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52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* VGS - from Princess Soft games [Gin no Eclipse (PS2), Metal Wolf REV (PS2)] */
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VGMSTREAM * init_vgmstream_ps2_vgs(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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size_t data_size, channel_size, interleave;
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int loop_flag, channel_count;
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int32_t loop_start = 0, loop_end = 0;
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/* check */
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if ( !check_extensions(streamFile,"vgs") )
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x56475300) /* "VGS\0" ('VAG stereo', presumably) */
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goto fail;
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start_offset = 0x30;
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data_size = get_streamfile_size(streamFile) - start_offset;
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interleave = 0x20000;
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channel_count = 2;
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channel_size = read_32bitBE(0x0c,streamFile);
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loop_flag = 0; /* all files have loop flags but simply fade out normally and repeat */
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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->meta_type = meta_PS2_VGS;
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vgmstream->sample_rate = read_32bitBE(0x10,streamFile);
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vgmstream->num_samples = ps_bytes_to_samples(channel_size,1);
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vgmstream->loop_start_sample = loop_start;
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vgmstream->loop_end_sample = loop_end;
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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 = interleave;
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if (vgmstream->interleave_block_size)
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vgmstream->interleave_last_block_size = (data_size % (vgmstream->interleave_block_size*vgmstream->channels)) / vgmstream->channels;
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read_string(vgmstream->stream_name,0x10+1, 0x20,streamFile); /* always, can be null */
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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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