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45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* ADPCM - from NAOMI/NAOMI2 Arcade games [F355 Challenge (Naomi)] */
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VGMSTREAM * init_vgmstream_naomi_adpcm(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channel_count;
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size_t data_size;
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/* checks */
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if (!check_extensions(streamFile, "adpcm"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x41445043 || /* "ADPC" */
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read_32bitBE(0x04,streamFile) != 0x4D5F7630) /* "M_v0" */
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goto fail;
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/* there is some kind of info in the end padding, loop related? */
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loop_flag = 0;
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channel_count = 2;
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start_offset = 0x40;
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data_size = read_32bitLE(0x10,streamFile) * 0x100; /* data has padding */
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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 = 44100;
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vgmstream->num_samples = yamaha_bytes_to_samples(data_size, channel_count);
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vgmstream->coding_type = coding_AICA_int;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = data_size / channel_count;
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vgmstream->meta_type = meta_NAOMI_ADPCM;
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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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