mirror of
https://github.com/vgmstream/vgmstream.git
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6e0d262a28
git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@90 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "../util.h"
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/* RWSD is quite similar to BRSTM, but can contain several streams.
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* Still, some games use it for single streams. We only support the
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* single stream form here */
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VGMSTREAM * init_vgmstream_rwsd(const char * const filename) {
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VGMSTREAM * vgmstream = NULL;
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STREAMFILE * infile = NULL;
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coding_t coding_type;
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off_t wave_offset;
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size_t wave_length;
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int codec_number;
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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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size_t stream_size;
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/* check extension, case insensitive */
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if (strcasecmp("rwsd",filename_extension(filename))) goto fail;
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/* try to open the file for header reading */
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infile = open_streamfile(filename);
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if (!infile) goto fail;
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/* check header */
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if ((uint32_t)read_32bitBE(0,infile)!=0x52575344 || /* "RWSD" */
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(uint32_t)read_32bitBE(4,infile)!=0xFEFF0102)
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goto fail;
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/* ideally we would look through the chunk list for a WAVE chunk,
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* but it's always in the same order */
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/* get WAVE offset, check */
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wave_offset = read_32bitBE(0x18,infile);
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if ((uint32_t)read_32bitBE(wave_offset,infile)!=0x57415645) /* "WAVE" */
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goto fail;
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/* get WAVE size, check */
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wave_length = read_32bitBE(0x1c,infile);
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if (read_32bitBE(wave_offset+4,infile)!=wave_length)
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goto fail;
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/* check wave count */
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if (read_32bitBE(wave_offset+8,infile) != 1)
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goto fail; /* only support 1 */
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/* get type details */
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codec_number = read_8bit(wave_offset+0x10,infile);
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loop_flag = read_8bit(wave_offset+0x11,infile);
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channel_count = read_8bit(wave_offset+0x12,infile);
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switch (codec_number) {
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case 0:
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coding_type = coding_PCM8;
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break;
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case 1:
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coding_type = coding_PCM16BE;
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break;
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case 2:
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coding_type = coding_NGC_DSP;
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break;
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default:
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goto fail;
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}
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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 = dsp_nibbles_to_samples(read_32bitBE(wave_offset+0x1c,infile));
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vgmstream->sample_rate = (uint16_t)read_16bitBE(wave_offset+0x14,infile);
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/* channels and loop flag are set by allocate_vgmstream */
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vgmstream->loop_start_sample = dsp_nibbles_to_samples(read_32bitBE(wave_offset+0x18,infile));
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vgmstream->loop_end_sample = vgmstream->num_samples;
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vgmstream->coding_type = coding_type;
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_RWSD;
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if (vgmstream->coding_type == coding_NGC_DSP) {
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off_t coef_offset;
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int i,j;
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coef_offset=0x6c;
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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_16bitBE(wave_offset+coef_offset+j*0x30+i*2,infile);
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}
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}
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}
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start_offset = read_32bitBE(8,infile);
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stream_size = read_32bitBE(wave_offset+0x50,infile);
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close_streamfile(infile); infile=NULL;
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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 = open_streamfile_buffer(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*stream_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 (infile) close_streamfile(infile);
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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