mirror of
https://github.com/vgmstream/vgmstream.git
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58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* GbTs - from Konami/KCE Studio games [Pop'n Music 9/10 (PS2)] */
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VGMSTREAM* init_vgmstream_gbts(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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uint32_t data_offset, data_size;
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int loop_flag, channels, sample_rate;
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uint32_t loop_start, loop_end;
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/* checks */
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if (!is_id32be(0x00,sf, "GbTs"))
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return NULL;
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/* .gbts: header id (no apparent exts) */
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if (!check_extensions(sf, "gbts"))
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return NULL;
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/* 04: always 0x24 */
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data_offset = read_u32le(0x08,sf);
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data_size = read_u32le(0x0C,sf); /* without padding */
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loop_start = read_u32le(0x10,sf); /* (0x20 = start frame if not set) */
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loop_end = read_u32le(0x14,sf); /* (0x00 if not set) */
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sample_rate = read_s32le(0x18,sf);
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channels = read_s32le(0x1C,sf);
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/* 20: 1? */
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/* 24: block size (interleave * channels) */
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/* 30+: empty */
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loop_flag = (loop_end > 0);
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loop_end += loop_start; /* loop region matches PS-ADPCM flags */
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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->sample_rate = sample_rate;
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vgmstream->num_samples = ps_bytes_to_samples(data_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_interleave;
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vgmstream->interleave_block_size = 0x10;
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vgmstream->meta_type = meta_GBTS;
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if (!vgmstream_open_stream(vgmstream, sf, data_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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