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AICA is simply Dreamcast's sound chip that uses standard Yamaha ADPCM, codec used by Yamaha in many other places well before the Dreamcast
50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* NXAP - Nex Entertainment header [Time Crisis 4 (PS3), Time Crisis Razing Storm (PS3)] */
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VGMSTREAM * init_vgmstream_nxap(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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/* checks */
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if (!check_extensions(streamFile, "adp"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x4E584150) /* "NXAP" */
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goto fail;
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if (read_32bitLE(0x14,streamFile) != 0x40 || /* expected frame size? */
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read_32bitLE(0x18,streamFile) != 0x40) /* expected interleave? */
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goto fail;
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start_offset = read_32bitLE(0x04,streamFile);
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channel_count = read_32bitLE(0x0c,streamFile);
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loop_flag = 0; //(read_32bitLE(0x24,streamFile) > 0); //todo
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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 = read_32bitLE(0x1c,streamFile) * (0x40-0x04)*2 / channel_count; /* number of frames */
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/* unknown loop format, also 0x28/2c values seem related */
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//vgmstream->loop_start_sample = read_32bitLE(0x20,streamFile) * (0x40-0x04)*2 / channel_count;
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//vgmstream->loop_end_sample = read_32bitLE(0x24,streamFile) * (0x40-0x04)*2 / channel_count;
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//vgmstream->loop_end_sample = vgmstream->loop_start_sample + vgmstream->loop_end_sample;
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vgmstream->meta_type = meta_NXAP;
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vgmstream->coding_type = coding_NXAP;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x40;
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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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