mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-14 07:32:52 +01:00
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "../util.h"
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/* .dsp w/ RS03 header - from Metroid Prime 2 */
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VGMSTREAM * init_vgmstream_rs03(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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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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int i;
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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("dsp",filename_extension(filename))) goto fail;
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/* check header */
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if ((uint32_t)read_32bitBE(0,streamFile)!=0x52530003) /* "RS03" */
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goto fail;
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channel_count = read_32bitBE(4,streamFile);
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if (channel_count != 1 && channel_count != 2) goto fail;
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/* build the VGMSTREAM */
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loop_flag = read_16bitBE(0x14,streamFile);
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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_32bitBE(8,streamFile);
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vgmstream->sample_rate = read_32bitBE(0xc,streamFile);
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if (loop_flag) {
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vgmstream->loop_start_sample = read_32bitBE(0x18,streamFile)/8*14;
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vgmstream->loop_end_sample = read_32bitBE(0x1c,streamFile)/8*14;
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}
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start_offset = 0x60;
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vgmstream->coding_type = coding_NGC_DSP;
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if (channel_count == 2) {
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vgmstream->layout_type = layout_interleave_shortblock;
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vgmstream->interleave_block_size = 0x8f00;
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vgmstream->interleave_smallblock_size = (((get_streamfile_size(streamFile)-start_offset)%(0x8f00*2))/2+7)/8*8;
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} else
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_DSP_RS03;
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for (i=0;i<16;i++)
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vgmstream->ch[0].adpcm_coef[i]=read_16bitBE(0x20+i*2,streamFile);
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if (channel_count==2) {
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for (i=0;i<16;i++)
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vgmstream->ch[1].adpcm_coef[i]=read_16bitBE(0x40+i*2,streamFile);
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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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vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,0x8f00);
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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+0x8f00*i;
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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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