mirror of
https://github.com/vgmstream/vgmstream.git
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83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
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#include "meta.h"
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#include "../coding/coding.h"
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/* WB - from Psychonauts (PS2) */
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VGMSTREAM* init_vgmstream_pwb(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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int channels, loop_flag;
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uint32_t stream_offset, stream_size, loop_start, loop_end;
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/* checks */
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if (!is_id32be(0x00, sf, "WB\2\0"))
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return NULL;
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/* .pwb: actual extension (bigfile has only hashes but there are names in internal files)
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* (some .pwb have a companion .psb, seems cue-related) */
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if (!check_extensions(sf, "pwb"))
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return NULL;
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/* 00: ID
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* 04: null
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* 08: header offset? (0x20)
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* 0c: header size? (0x20)
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* 10: entries offset
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* 14: entries size
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* 18: data offset
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* 1c: data size
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* 20: always 1 (channels? codec?)
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* 24: entries count
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* 28: entry size
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* 2c: data offset
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*/
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stream_offset = read_u32le(0x18, sf);
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int total_subsongs = read_s32le(0x24, sf);
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int target_subsong = sf->stream_index;
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong > total_subsongs || total_subsongs <= 0) goto fail;
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{
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uint32_t offset = read_u32le(0x10, sf) + (target_subsong - 1) * read_u32le(0x28, sf);
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/* 0x00: flags? */
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/* 0x04: always 000AC449 */
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stream_offset = read_u32le(offset + 0x08, sf) + stream_offset;
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stream_size = read_u32le(offset + 0x0c, sf);
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loop_start = read_u32le(offset + 0x10, sf);
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loop_end = read_u32le(offset + 0x14, sf) + loop_start;
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loop_flag = loop_end; /* both 0 if no loop */
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channels = 1;
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}
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_PWB;
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vgmstream->sample_rate = 24000;
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vgmstream->num_samples = ps_bytes_to_samples(stream_size, channels);
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vgmstream->loop_start_sample = ps_bytes_to_samples(loop_start, channels);
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vgmstream->loop_end_sample = ps_bytes_to_samples(loop_end, channels);
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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_none;
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vgmstream->num_streams = total_subsongs;
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vgmstream->stream_size = stream_size;
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if (!vgmstream_open_stream(vgmstream, sf, stream_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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close_streamfile(sf);
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return NULL;
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}
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