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forgot ads.c

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git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@594 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
This commit is contained in:
bxaimc 2009-03-11 22:38:49 +00:00
parent acf54a8fca
commit 877bb475b3
1 changed files with 80 additions and 0 deletions
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src/meta/ads.c Normal file
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#include "meta.h"
#include "../util.h"
/* ADS (from Gauntlet Dark Legends (GC)) */
VGMSTREAM * init_vgmstream_ads(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
off_t start_offset;
int loop_flag;
int channel_count;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("ads",filename_extension(filename))) goto fail;
/* check dhSS Header */
if (read_32bitBE(0x00,streamFile) != 0x64685353)
goto fail;
/* check dbSS Header */
if (read_32bitBE(0x20,streamFile) != 0x64625353)
goto fail;
loop_flag = 1;
channel_count = read_32bitBE(0x10,streamFile);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
start_offset = 0xE8;
vgmstream->channels = channel_count;
vgmstream->sample_rate = read_32bitBE(0x0c,streamFile);
vgmstream->coding_type = coding_NGC_DSP;
vgmstream->num_samples = read_32bitBE(0x28,streamFile);
if (loop_flag) {
vgmstream->loop_start_sample = 0;
vgmstream->loop_end_sample = vgmstream->num_samples;
}
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x20;
vgmstream->meta_type = meta_ADS;
if (vgmstream->coding_type == coding_NGC_DSP) {
int i;
for (i=0;i<16;i++) {
vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(0x44+i*2,streamFile);
}
if (vgmstream->channels) {
for (i=0;i<16;i++) {
vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(0xA4+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;
fail:
/* clean up anything we may have opened */
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}