vgmstream/src/meta/ps2_ads.c

94 lines
2.8 KiB
C

#include "meta.h"
#include "../util.h"
/* Sony .ADS with SShd & SSbd Headers */
VGMSTREAM * init_vgmstream_ps2_ads(const char * const filename) {
VGMSTREAM * vgmstream = NULL;
STREAMFILE * infile = NULL;
int loop_flag=0;
int channel_count;
int i;
/* check extension, case insensitive */
if (strcasecmp("ads",filename_extension(filename)) &&
strcasecmp("ss2",filename_extension(filename))) goto fail;
/* try to open the file for header reading */
infile = open_streamfile(filename);
if (!infile) goto fail;
/* check SShd Header */
if (read_32bitBE(0x00,infile) != 0x53536864)
goto fail;
/* check SSbd Header */
if (read_32bitBE(0x20,infile) != 0x53536264)
goto fail;
/* check if file is not corrupt */
if (get_streamfile_size(infile)<(size_t)(read_32bitLE(0x24,infile) + 0x28))
goto fail;
/* check loop */
loop_flag = (read_32bitLE(0x18,infile)!=0xFFFFFFFF);
channel_count=read_32bitLE(0x10,infile);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
vgmstream->channels = read_32bitLE(0x10,infile);
vgmstream->sample_rate = read_32bitLE(0x0C,infile);
/* Check for Compression Scheme */
vgmstream->coding_type = coding_PSX;
vgmstream->num_samples = read_32bitLE(0x24,infile)/16*28/vgmstream->channels;
/* SS2 container with RAW Interleaved PCM */
if (read_32bitLE(0x08,infile)!=0x10) {
vgmstream->coding_type=coding_PCM16LE;
vgmstream->num_samples = read_32bitLE(0x24,infile)/2/vgmstream->channels;
}
/* Get loop point values */
if(vgmstream->loop_flag) {
vgmstream->loop_start_sample = read_32bitLE(0x18,infile);
vgmstream->loop_end_sample = read_32bitLE(0x1C,infile);
}
/* don't know why, but it does happen, in ps2 too :( */
if (vgmstream->loop_end_sample > vgmstream->num_samples)
vgmstream->loop_end_sample = vgmstream->num_samples;
vgmstream->interleave_block_size = read_32bitLE(0x14,infile);
vgmstream->layout_type = layout_interleave;
vgmstream->meta_type = meta_PS2_SShd;
close_streamfile(infile); infile=NULL;
/* open the file for reading by each channel */
{
for (i=0;i<channel_count;i++) {
vgmstream->ch[i].streamfile = open_streamfile_buffer(filename,0x8000);
if (!vgmstream->ch[i].streamfile) goto fail;
vgmstream->ch[i].channel_start_offset=
vgmstream->ch[i].offset=
(off_t)(0x28+vgmstream->interleave_block_size*i);
}
}
return vgmstream;
/* clean up anything we may have opened */
fail:
if (infile) close_streamfile(infile);
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}