mirror of
https://github.com/vgmstream/vgmstream.git
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55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* VPK - from SCE America second party devs [God of War (PS2), NBA 08 (PS3)] */
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VGMSTREAM * init_vgmstream_vpk(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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int loop_flag, channel_count;
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off_t start_offset, loop_channel_offset;
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size_t channel_size;
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/* checks */
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if (!check_extensions(streamFile, "vpk"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x204B5056) /* " KPV" */
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goto fail;
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/* files are padded with garbage/silent 0xC00000..00 frames, and channel_size sometimes
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* has extra size into the padding: +0x10 (NBA08), +0x20 (GoW), or none (Sly 2, loops ok).
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* Could detect and remove to slightly improve full loops, but maybe this is just how the game works */
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channel_size = read_32bitLE(0x04,streamFile);
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start_offset = read_32bitLE(0x08,streamFile);
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channel_count = read_32bitLE(0x14,streamFile);
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/* 0x18+: channel config(?), 0x04 per channel */
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loop_channel_offset = read_32bitLE(0x7FC,streamFile);
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loop_flag = (loop_channel_offset != 0); /* found in Sly 2/3 */
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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(0x10,streamFile);
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vgmstream->num_samples = ps_bytes_to_samples(channel_size*vgmstream->channels,vgmstream->channels);
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if (vgmstream->loop_flag) {
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vgmstream->loop_start_sample = ps_bytes_to_samples(loop_channel_offset*vgmstream->channels,vgmstream->channels);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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vgmstream->meta_type = meta_VPK;
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vgmstream->coding_type = coding_PSX;
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vgmstream->interleave_block_size = read_32bitLE(0x0C,streamFile) / 2; /* even in >2ch */
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vgmstream->layout_type = layout_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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