mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-14 15:42:52 +01:00
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
|
|
/* EXST
|
|
|
|
PS2 INT format is an interleaved format found in Shadow of the Colossus
|
|
The header start with a EXST id.
|
|
The headers and bgm datas was separated in the game, and joined in order
|
|
to add support for vgmstream
|
|
|
|
The interleave value is allways 0x400
|
|
known extensions : .STS
|
|
|
|
2008-05-13 - Fastelbja : First version ...
|
|
*/
|
|
|
|
VGMSTREAM * init_vgmstream_ps2_exst(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
char filename[PATH_LIMIT];
|
|
|
|
int loop_flag=0;
|
|
int channel_count;
|
|
int i;
|
|
|
|
/* check extension, case insensitive */
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
|
if (strcasecmp("sts",filename_extension(filename))) goto fail;
|
|
|
|
/* check EXST Header */
|
|
if (read_32bitBE(0x00,streamFile) != 0x45585354)
|
|
goto fail;
|
|
|
|
/* check loop */
|
|
loop_flag = (read_32bitLE(0x0C,streamFile)==1);
|
|
|
|
channel_count=read_16bitLE(0x06,streamFile);
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count,loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
/* fill in the vital statistics */
|
|
vgmstream->channels = read_16bitLE(0x06,streamFile);
|
|
vgmstream->sample_rate = read_32bitLE(0x08,streamFile);
|
|
|
|
/* Compression Scheme */
|
|
vgmstream->coding_type = coding_PSX;
|
|
vgmstream->num_samples = (read_32bitLE(0x14,streamFile)*0x400)/16*28;
|
|
|
|
/* Get loop point values */
|
|
if(vgmstream->loop_flag) {
|
|
vgmstream->loop_start_sample = (read_32bitLE(0x10,streamFile)*0x400)/16*28;
|
|
vgmstream->loop_end_sample = (read_32bitLE(0x14,streamFile)*0x400)/16*28;
|
|
}
|
|
|
|
vgmstream->interleave_block_size = 0x400;
|
|
vgmstream->layout_type = layout_interleave;
|
|
vgmstream->meta_type = meta_PS2_EXST;
|
|
|
|
/* open the file for reading by each channel */
|
|
{
|
|
for (i=0;i<channel_count;i++) {
|
|
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,0x8000);
|
|
|
|
if (!vgmstream->ch[i].streamfile) goto fail;
|
|
|
|
vgmstream->ch[i].channel_start_offset=
|
|
vgmstream->ch[i].offset=
|
|
(off_t)(0x78+vgmstream->interleave_block_size*i);
|
|
}
|
|
}
|
|
|
|
return vgmstream;
|
|
|
|
/* clean up anything we may have opened */
|
|
fail:
|
|
if (vgmstream) close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|