96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
#include "meta.h"
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#include "../util.h"
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#include "../coding/coding.h"
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/* Capcom MADP - found in Capcom 3DS games */
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VGMSTREAM * init_vgmstream_mca(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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int channel_count, loop_flag, version;
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size_t head_size, data_size, file_size;
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off_t start_offset, coef_offset, coef_start, coef_shift;
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int coef_spacing;
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/* check extension, case insensitive */
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if (!check_extensions(streamFile,"mca"))
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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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channel_count = read_8bit(0x8, streamFile);
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if (channel_count < 1) goto fail;
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loop_flag = read_32bitLE(0x18, streamFile) > 0;
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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->interleave_block_size = read_16bitLE(0xa, streamFile); /* guessed, only seen 0x100 */
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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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vgmstream->loop_start_sample = read_32bitLE(0x14, streamFile);
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vgmstream->loop_end_sample = read_32bitLE(0x18, streamFile);
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if (vgmstream->loop_end_sample > vgmstream->num_samples) /* some MH3U songs, somehow */
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vgmstream->loop_end_sample = vgmstream->num_samples;
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = channel_count == 1 ? layout_none : layout_interleave;
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vgmstream->meta_type = meta_MCA;
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/* find data/coef offsets (guessed, formula may change with version) */
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version = read_16bitLE(0x04, streamFile);
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coef_spacing = 0x30;
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data_size = read_32bitLE(0x20, streamFile);
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if (version <= 0x3) { /* v3: Resident Evil Mercenaries 3D, Super Street Fighter IV 3D */
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head_size = get_streamfile_size(streamFile) - data_size; /* probably 0x2c + 0x30*ch */
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coef_shift = 0x0;
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coef_start = head_size - coef_spacing * channel_count;
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start_offset = head_size;
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coef_offset = coef_start + coef_shift * 0x14;
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} else if (version == 0x4) { /* v4: EX Troopers, Ace Attourney 5 */
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head_size = read_16bitLE(0x1c, streamFile);
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coef_shift = read_16bitLE(0x28, streamFile);
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coef_start = head_size - coef_spacing * channel_count;
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start_offset = get_streamfile_size(streamFile) - data_size; /* usually head_size but not for some MH3U songs */
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coef_offset = coef_start + coef_shift * 0x14;
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} else { /* v5: Ace Attourney 6, Monster Hunter Generations, v6+? */
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head_size = read_16bitLE(0x1c, streamFile); /* partial size */
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coef_shift = read_16bitLE(0x28, streamFile);
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coef_start = head_size - coef_spacing * channel_count;
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start_offset = read_32bitLE(coef_start - 0x4, streamFile);
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coef_offset = coef_start + coef_shift * 0x14;
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}
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/* sanity check (for bad rips with the header manually truncated to in attempt to "fix" v5 headers) */
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file_size = get_streamfile_size(streamFile);
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if (start_offset + data_size > file_size) {
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if (head_size + data_size > file_size)
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goto fail;
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start_offset = file_size - data_size;
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}
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/* set up ADPCM coefs */
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dsp_read_coefs_le(vgmstream, streamFile, coef_offset, coef_spacing);
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/* open the file for reading */
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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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