mirror of
https://github.com/vgmstream/vgmstream.git
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83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* .KAT - standard sound bank format used on Dreamcast */
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VGMSTREAM *init_vgmstream_kat(STREAMFILE *sf) {
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VGMSTREAM *vgmstream = NULL;
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uint32_t entry_offset, type, start_offset, data_size, sample_rate, channels, bit_depth, loop_start, loop_end;
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int loop_flag;
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int num_sounds, target_stream = sf->stream_index;
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/* checks */
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if (!check_extensions(sf, "kat"))
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goto fail;
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num_sounds = read_u32le(0x00, sf);
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if (target_stream == 0) target_stream = 1;
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if (target_stream < 0 || num_sounds == 0 || target_stream > num_sounds)
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goto fail;
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entry_offset = 0x04 + (target_stream - 1) * 0x2c;
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type = read_u32le(entry_offset + 0x00, sf);
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if (type != 0x01) /* only type 0x01 is supported, other types are MIDI, programs, etc */
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goto fail;
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bit_depth = read_u32le(entry_offset + 0x14, sf);
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if (bit_depth != 4 && bit_depth != 8 && bit_depth != 16)
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goto fail;
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start_offset = read_u32le(entry_offset + 0x04, sf);
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data_size = read_u32le(entry_offset + 0x08, sf);
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sample_rate = read_u32le(entry_offset + 0x0c, sf);
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if (sample_rate > 48000)
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goto fail;
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loop_flag = read_u32le(entry_offset + 0x10, sf);
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loop_start = read_u32le(entry_offset + 0x1c, sf);
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loop_end = read_u32le(entry_offset + 0x20, sf);
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channels = 1; /* mono only */
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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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/* fill in the vital statistics */
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vgmstream->meta_type = meta_KAT;
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vgmstream->sample_rate = sample_rate;
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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->stream_size = data_size;
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vgmstream->num_streams = num_sounds;
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switch (bit_depth) {
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case 4:
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vgmstream->coding_type = coding_AICA_int;
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vgmstream->layout_type = layout_none;
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vgmstream->num_samples = yamaha_bytes_to_samples(data_size, channels);
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break;
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case 8:
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vgmstream->coding_type = coding_PCM8;
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vgmstream->layout_type = layout_none;
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vgmstream->num_samples = pcm_bytes_to_samples(data_size, channels, 8);
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break;
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case 16:
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vgmstream->coding_type = coding_PCM16LE;
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vgmstream->layout_type = layout_none;
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vgmstream->num_samples = pcm_bytes_to_samples(data_size, channels, 16);
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break;
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default:
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goto fail;
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}
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if (!vgmstream_open_stream(vgmstream, sf, 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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