mirror of
https://github.com/vgmstream/vgmstream.git
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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
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/*
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Capcom MADP format found in Capcom 3DS games.
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*/
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#include "meta.h"
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#include "../util.h"
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VGMSTREAM * init_vgmstream_mca(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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coding_t coding_type;
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int channel_count;
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int loop_flag;
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off_t start_offset;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile, filename, sizeof(filename));
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if (strcasecmp("mca", filename_extension(filename)))
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goto fail;
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/* check header */
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if ((uint32_t)read_32bitBE(0, streamFile) != 0x4D414450) /* "MADP" */
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goto fail;
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start_offset = (get_streamfile_size(streamFile) - read_32bitLE(0x20, streamFile));
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channel_count = read_8bit(0x8, streamFile);
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if (read_32bitLE(0x18, streamFile) > 0)
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loop_flag = 1;
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else
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loop_flag = 0;
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coding_type = coding_NGC_DSP;
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if (channel_count < 1) goto fail;
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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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/* fill in the vital statistics */
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vgmstream->num_samples = read_32bitLE(0xc, streamFile);
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vgmstream->sample_rate = (uint16_t)read_16bitLE(0x10, streamFile);
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/* channels and loop flag are set by allocate_vgmstream */
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vgmstream->loop_start_sample = read_32bitLE(0x14, streamFile);
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vgmstream->loop_end_sample = read_32bitLE(0x18, streamFile);
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vgmstream->coding_type = coding_type;
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if (channel_count == 1)
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vgmstream->layout_type = layout_none;
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else
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x100; // Constant for this format
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vgmstream->meta_type = meta_MCA;
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off_t coef_offset = start_offset - (vgmstream->channels * 0x30);
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int i, j;
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int coef_spacing = 0x30;
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for (j = 0; j<vgmstream->channels; j++) {
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for (i = 0; i<16; i++) {
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vgmstream->ch[j].adpcm_coef[i] = read_16bitLE(coef_offset + j*coef_spacing + i * 2, streamFile);
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}
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}
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/* open the file for reading by each channel */
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{
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int i;
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for (i = 0; i<channel_count; i++) {
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if (vgmstream->layout_type == layout_interleave_shortblock)
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vgmstream->ch[i].streamfile = streamFile->open(streamFile, filename,
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vgmstream->interleave_block_size);
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else if (vgmstream->layout_type == layout_interleave)
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vgmstream->ch[i].streamfile = streamFile->open(streamFile, filename,
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STREAMFILE_DEFAULT_BUFFER_SIZE);
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else
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vgmstream->ch[i].streamfile = streamFile->open(streamFile, filename,
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0x1000);
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if (!vgmstream->ch[i].streamfile) goto fail;
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vgmstream->ch[i].channel_start_offset =
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vgmstream->ch[i].offset =
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start_offset + i*vgmstream->interleave_block_size;
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}
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}
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return vgmstream;
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/* clean up anything we may have opened */
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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