67 lines
2.4 KiB
C
67 lines
2.4 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* VBK - from Disney's Stitch - Experiment 626 (PS2) */
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VGMSTREAM * init_vgmstream_ps2_vbk(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset, header_offset, stream_offset;
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size_t stream_size, interleave;
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int loop_flag, channel_count, sample_rate;
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int32_t num_samples, loop_start = 0, loop_end = 0;
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int total_subsongs, target_subsong = streamFile->stream_index;
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/* checks */
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if (!check_extensions(streamFile, "vbk"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x2E56424B) /* ".VBK" */
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goto fail;
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/* 0x04: version? always 0x02? */
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start_offset = read_32bitLE(0x0C, streamFile);
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/* 0x10: file size */
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total_subsongs = read_32bitLE(0x08,streamFile);
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
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header_offset = 0x14 + (target_subsong-1)*0x18;
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stream_size = read_32bitLE(header_offset+0x00,streamFile);
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/* 0x04: id? */
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stream_offset = read_32bitLE(header_offset+0x08,streamFile);
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sample_rate = read_32bitLE(header_offset+0x0c,streamFile);
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interleave = read_32bitLE(header_offset+0x10,streamFile);
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channel_count = read_32bitLE(header_offset+0x14,streamFile) + 1; /* 4ch is common, 1ch sfx too */
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start_offset += stream_offset;
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num_samples = ps_bytes_to_samples(stream_size,channel_count);
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loop_flag = ps_find_loop_offsets(streamFile, start_offset, stream_size, channel_count, interleave, &loop_start, &loop_end);
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loop_flag = loop_flag && (num_samples > 10*sample_rate); /* disable looping for smaller files (in seconds) */
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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_VBK;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = num_samples;
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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->num_streams = total_subsongs;
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vgmstream->stream_size = stream_size;
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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_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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