mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-22 11:25:53 +01:00
f6417c5430
There is not no real about having small-ish buffers, simplifies buffer tuning, and avoids having gigantic buffers on bad reads.
125 lines
4.1 KiB
C
125 lines
4.1 KiB
C
#include "meta.h"
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#include "../layout/layout.h"
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#include "../coding/coding.h"
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#include "../util.h"
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/* .mus, as seen in Star Wars The Force Unleashed for Wii */
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/* Doesn't seem to be working quite right yet, coef table looks odd */
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VGMSTREAM * init_vgmstream_wii_mus(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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off_t start_offset;
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off_t interleave;
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int i;
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struct {
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uint16_t gain;
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uint16_t initial_ps;
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uint16_t initial_hist1;
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uint16_t initial_hist2;
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uint16_t loop_ps;
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/*
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uint16_t loop_hist1;
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uint16_t loop_hist2;
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*/
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} channel[2];
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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("mus",filename_extension(filename))) goto fail;
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start_offset = read_32bitBE(0x08,streamFile);
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interleave = read_32bitBE(0x04,streamFile);
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for (i=0;i<2;i++)
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{
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channel[i].gain = read_16bitBE(0x30+i*0x2e,streamFile);
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channel[i].initial_ps = read_16bitBE(0x32+i*0x2e,streamFile);
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channel[i].initial_hist1 = read_16bitBE(0x34+i*0x2e,streamFile);
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channel[i].initial_hist2 = read_16bitBE(0x36+i*0x2e,streamFile);
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channel[i].loop_ps = read_16bitBE(0x38+i*0x2e,streamFile);
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}
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/* check initial predictor/scale */
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if (channel[0].initial_ps != (uint8_t)read_8bit(start_offset,streamFile))
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goto fail;
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if (channel[1].initial_ps != (uint8_t)read_8bit(start_offset+interleave,streamFile))
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goto fail;
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/* check type==0 and gain==0 */
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if (channel[0].gain ||
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channel[1].gain)
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goto fail;
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#if 0
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if (ch0_header.loop_flag) {
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off_t loop_off;
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/* check loop predictor/scale */
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loop_off = ch0_header.loop_start_offset/16*8;
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loop_off = (loop_off/interleave*interleave*2) + (loop_off%interleave);
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if (ch0_header.loop_ps != (uint8_t)read_8bit(start_offset+loop_off,streamFile))
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goto fail;
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if (ch1_header.loop_ps != (uint8_t)read_8bit(start_offset+loop_off+interleave,streamFile))
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goto fail;
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}
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#endif
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(2,0);
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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_32bitBE(0x0,streamFile);
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vgmstream->sample_rate = (uint16_t)read_16bitBE(0x6c,streamFile);
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/* TODO: adjust for interleave? */
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#if 0
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vgmstream->loop_start_sample = dsp_nibbles_to_samples(
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ch0_header.loop_start_offset);
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vgmstream->loop_end_sample = dsp_nibbles_to_samples(
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ch0_header.loop_end_offset)+1;
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#endif
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = interleave;
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vgmstream->meta_type = meta_DSP_WII_MUS;
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/* coeffs */
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for (i=0;i<16;i++) {
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vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(0x10 + i*2,streamFile);
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vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(0x3e + i*2,streamFile);
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}
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/* initial history */
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/* always 0 that I've ever seen, but for completeness... */
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vgmstream->ch[0].adpcm_history1_16 = channel[0].initial_hist1;
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vgmstream->ch[0].adpcm_history2_16 = channel[0].initial_hist2;
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vgmstream->ch[1].adpcm_history1_16 = channel[1].initial_hist1;
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vgmstream->ch[1].adpcm_history2_16 = channel[1].initial_hist2;
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vgmstream->ch[0].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!vgmstream->ch[0].streamfile) goto fail;
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vgmstream->ch[1].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!vgmstream->ch[1].streamfile) goto fail;
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/* open the file for reading */
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for (i=0;i<2;i++) {
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=start_offset+i*interleave;
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}
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return vgmstream;
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fail:
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/* clean up anything we may have opened */
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if (vgmstream) {
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if (vgmstream->ch[0].streamfile) close_streamfile(vgmstream->ch[0].streamfile);
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close_vgmstream(vgmstream);
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}
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return NULL;
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}
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