mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 04:14:50 +01:00
f6417c5430
There is not no real about having small-ish buffers, simplifies buffer tuning, and avoids having gigantic buffers on bad reads.
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
|
|
/* GBTS : Pop'n'Music 9 Bgm File */
|
|
|
|
VGMSTREAM * init_vgmstream_ps2_gbts(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
char filename[PATH_LIMIT];
|
|
|
|
int loop_flag=0;
|
|
int channel_count;
|
|
off_t start_offset;
|
|
off_t loopStart = 0;
|
|
off_t loopEnd = 0;
|
|
size_t filelength;
|
|
|
|
int i;
|
|
|
|
/* check extension, case insensitive */
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
|
if (strcasecmp("gbts",filename_extension(filename))) goto fail;
|
|
|
|
/* check loop */
|
|
start_offset=0x801;
|
|
|
|
filelength = get_streamfile_size(streamFile);
|
|
do {
|
|
// Loop Start ...
|
|
if(read_8bit(start_offset,streamFile)==0x06) {
|
|
if(loopStart==0) loopStart = start_offset-0x801;
|
|
}
|
|
|
|
// Loop End ...
|
|
if(read_8bit(start_offset,streamFile)==0x03) {
|
|
if(loopEnd==0) loopEnd = start_offset-0x801-0x10;
|
|
}
|
|
|
|
start_offset+=0x10;
|
|
|
|
} while (start_offset<(int32_t)filelength);
|
|
|
|
loop_flag = (loopEnd!=0);
|
|
channel_count=read_32bitLE(0x1C,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(0x18,streamFile);;
|
|
|
|
/* Check for Compression Scheme */
|
|
vgmstream->coding_type = coding_PSX;
|
|
vgmstream->num_samples = read_32bitLE(0x0C,streamFile)/16*28/vgmstream->channels;
|
|
vgmstream->interleave_block_size = 0x10;
|
|
|
|
/* Get loop point values */
|
|
if(vgmstream->loop_flag) {
|
|
vgmstream->loop_start_sample = (loopStart/(vgmstream->interleave_block_size)*vgmstream->interleave_block_size)/16*28;
|
|
vgmstream->loop_start_sample += (loopStart%vgmstream->interleave_block_size)/16*28;
|
|
vgmstream->loop_start_sample /=vgmstream->channels;
|
|
vgmstream->loop_end_sample = (loopEnd/(vgmstream->interleave_block_size)*vgmstream->interleave_block_size)/16*28;
|
|
vgmstream->loop_end_sample += (loopEnd%vgmstream->interleave_block_size)/16*28;
|
|
vgmstream->loop_end_sample /=vgmstream->channels;
|
|
}
|
|
|
|
vgmstream->layout_type = layout_interleave;
|
|
vgmstream->meta_type = meta_PS2_GBTS;
|
|
|
|
start_offset = (off_t)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;
|
|
}
|