vgmstream/src/meta/ish_isd.c

92 lines
2.8 KiB
C
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#include "meta.h"
#include "../util.h"
/*
ISH+ISD
*/
VGMSTREAM * init_vgmstream_ish_isd(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
STREAMFILE * streamFileISH = NULL;
char filename[PATH_LIMIT];
char filenameISH[PATH_LIMIT];
int i;
int channel_count;
int loop_flag;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("isd",filename_extension(filename))) goto fail;
strcpy(filenameISH,filename);
strcpy(filenameISH+strlen(filenameISH)-3,"ish");
streamFileISH = streamFile->open(streamFile,filenameISH,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (!streamFileISH) goto fail;
/* check header */
if (read_32bitBE(0x00,streamFileISH) != 0x495F5346) /* "I_SF" */
goto fail;
channel_count = read_32bitBE(0x14,streamFileISH);
loop_flag = (read_32bitBE(0x1C,streamFileISH) !=0);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
vgmstream->channels = channel_count;
vgmstream->sample_rate = read_32bitBE(0x08,streamFileISH);
vgmstream->num_samples=read_32bitBE(0x0C,streamFileISH);
vgmstream->coding_type = coding_NGC_DSP;
if(loop_flag) {
vgmstream->loop_start_sample = read_32bitBE(0x20,streamFileISH)*14/8/channel_count;
vgmstream->loop_end_sample = read_32bitBE(0x24,streamFileISH)*14/8/channel_count;
}
if (channel_count == 1) {
vgmstream->layout_type = layout_none;
} else if (channel_count == 2) {
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = read_32bitBE(0x18,streamFileISH);
}
vgmstream->meta_type = meta_ISH_ISD;
/* open the file for reading by each channel */
{
for (i=0;i<channel_count;i++) {
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,vgmstream->interleave_block_size);
if (!vgmstream->ch[i].streamfile) goto fail;
vgmstream->ch[i].channel_start_offset=
vgmstream->ch[i].offset=i*vgmstream->interleave_block_size;
}
}
if (vgmstream->coding_type == coding_NGC_DSP) {
int i;
for (i=0;i<16;i++) {
vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(0x40+i*2,streamFileISH);
}
if (vgmstream->channels == 2) {
for (i=0;i<16;i++) {
vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(0x80+i*2,streamFileISH);
}
}
}
close_streamfile(streamFileISH); streamFileISH=NULL;
return vgmstream;
/* clean up anything we may have opened */
fail:
if (streamFileISH) close_streamfile(streamFileISH);
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}