vgmstream/src/meta/str_asr.c

98 lines
3.1 KiB
C

#include "meta.h"
#include "../util.h"
/* STR -ASR (from Donkey Kong Jet Race) */
VGMSTREAM * init_vgmstream_str_asr(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[PATH_LIMIT];
off_t start_offset;
int loop_flag = 0;
int channel_count;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("str",filename_extension(filename)) && /* PCM Files */
strcasecmp("asr",filename_extension(filename))) /* DSP Files */
goto fail;
/* check header */
if (read_32bitBE(0x00,streamFile) != 0x4B4E4F4E && /* "KNON" */
read_32bitBE(0x04,streamFile) != 0x00000000 && /* "0x0" */
read_32bitBE(0x08,streamFile) != 0x57494920) goto fail; /* "WII\0x20" */
loop_flag = (read_32bitBE(0x44,streamFile)!=0);
channel_count = 2;
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
start_offset = 0x800;
vgmstream->channels = channel_count;
vgmstream->sample_rate = read_32bitBE(0x40,streamFile);
switch (read_32bitBE(0x20,streamFile)) {
case 0x4B415354: /* KAST - DSP encoding */
vgmstream->coding_type = coding_NGC_DSP;
vgmstream->num_samples = (read_32bitBE(0x3C,streamFile))*14/8/channel_count;
if (loop_flag) {
vgmstream->loop_start_sample = (read_32bitBE(0x44,streamFile))*14/8/channel_count;
vgmstream->loop_end_sample = (read_32bitBE(0x48,streamFile))*14/8/channel_count;
}
vgmstream->interleave_block_size = 0x10;
break;
case 0x4B505354: /* KPST - PCM encoding */
vgmstream->coding_type = coding_PCM16BE;
vgmstream->num_samples = (read_32bitBE(0x3C,streamFile))/2/channel_count;
if (loop_flag) {
vgmstream->loop_start_sample = (read_32bitBE(0x44,streamFile))/2/channel_count;
vgmstream->loop_end_sample = (read_32bitBE(0x48,streamFile))/2/channel_count;
}
vgmstream->interleave_block_size = 0x10;
break;
default:
goto fail;
}
/* Interleave and Layout settings */
vgmstream->layout_type = layout_interleave;
vgmstream->meta_type = meta_STR_ASR;
if (vgmstream->coding_type == coding_NGC_DSP) {
int i;
for (i=0;i<16;i++) {
vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(0x8C+i*2,streamFile);
}
if (vgmstream->channels) {
for (i=0;i<16;i++) {
vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(0xEC+i*2,streamFile);
}
}
}
/* open the file for reading */
{
int i;
STREAMFILE * file;
file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (!file) goto fail;
for (i=0;i<channel_count;i++) {
vgmstream->ch[i].streamfile = file;
vgmstream->ch[i].channel_start_offset=
vgmstream->ch[i].offset=start_offset+
vgmstream->interleave_block_size*i;
}
}
return vgmstream;
/* clean up anything we may have opened */
fail:
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}