mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-25 12:54:51 +01:00
f6417c5430
There is not no real about having small-ish buffers, simplifies buffer tuning, and avoids having gigantic buffers on bad reads.
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
|
|
/* GMS
|
|
|
|
PSX GMS format has no recognition ID.
|
|
This format was used essentially in Grandia Games but
|
|
can be easily used by other header format as the format of the header is very simple
|
|
|
|
known extensions : GMS
|
|
|
|
2008-05-19 - Fastelbja : First version ...
|
|
*/
|
|
|
|
VGMSTREAM * init_vgmstream_psx_gms(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
char filename[PATH_LIMIT];
|
|
|
|
int loop_flag=0;
|
|
int channel_count;
|
|
off_t start_offset;
|
|
int i;
|
|
|
|
/* check extension, case insensitive */
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
|
if (strcasecmp("gms",filename_extension(filename))) goto fail;
|
|
|
|
/* check loop */
|
|
loop_flag = (read_32bitLE(0x20,streamFile)==0);
|
|
|
|
/* Always stereo files */
|
|
channel_count=read_32bitLE(0x00,streamFile);
|
|
|
|
/* 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_32bitLE(0x04,streamFile);
|
|
|
|
vgmstream->coding_type = coding_PSX;
|
|
vgmstream->num_samples = read_32bitLE(0x1C,streamFile);
|
|
|
|
/* Get loop point values */
|
|
if(vgmstream->loop_flag) {
|
|
vgmstream->loop_start_sample = read_32bitLE(0x14,streamFile);
|
|
vgmstream->loop_end_sample = read_32bitLE(0x1C,streamFile);
|
|
}
|
|
|
|
vgmstream->layout_type = layout_interleave;
|
|
vgmstream->interleave_block_size = 0x800;
|
|
vgmstream->meta_type = meta_PSX_GMS;
|
|
|
|
start_offset = 0x800;
|
|
|
|
/* open the file for reading by each channel */
|
|
{
|
|
for (i=0;i<channel_count;i++) {
|
|
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
|
|
|
|
if (!vgmstream->ch[i].streamfile) goto fail;
|
|
|
|
vgmstream->ch[i].channel_start_offset=
|
|
vgmstream->ch[i].offset=
|
|
(off_t)(start_offset+vgmstream->interleave_block_size*i);
|
|
}
|
|
}
|
|
|
|
return vgmstream;
|
|
|
|
/* clean up anything we may have opened */
|
|
fail:
|
|
if (vgmstream) close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|