mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-30 15:23:05 +01:00
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
|
#include "meta.h"
|
||
|
|
#include "../coding/coding.h"
|
||
|
|
#include "../layout/layout.h"
|
||
|
|
#include "../util.h"
|
||
|
|
|
||
|
|
/* Otomedius OTM (Arcade) */
|
||
|
|
VGMSTREAM * init_vgmstream_otm(STREAMFILE *streamFile) {
|
||
|
|
VGMSTREAM * vgmstream = NULL;
|
||
|
|
char filename[PATH_LIMIT];
|
||
|
|
off_t start_offset;
|
||
|
|
|
||
|
|
int loop_flag;
|
||
|
|
int channel_count;
|
||
|
|
|
||
|
|
/* check extension, case insensitive */
|
||
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
||
|
|
if (strcasecmp("otm",filename_extension(filename))) goto fail;
|
||
|
|
|
||
|
|
/* check header */
|
||
|
|
if (read_32bitBE(0x20,streamFile) != 0x10B10200)
|
||
|
|
goto fail;
|
||
|
|
if (read_32bitBE(0x24,streamFile) != 0x04001000)
|
||
|
|
goto fail;
|
||
|
|
|
||
|
|
if (read_32bitBE(0x14,streamFile) != 0x00000000)
|
||
|
|
loop_flag = 1;
|
||
|
|
else
|
||
|
|
loop_flag = 0;
|
||
|
|
channel_count = read_16bitLE(0x1A,streamFile);
|
||
|
|
|
||
|
|
/* build the VGMSTREAM */
|
||
|
|
vgmstream = allocate_vgmstream(channel_count,loop_flag);
|
||
|
|
if (!vgmstream) goto fail;
|
||
|
|
|
||
|
|
/* fill in the vital statistics */
|
||
|
|
start_offset = 0x2C;
|
||
|
|
vgmstream->num_samples = (get_streamfile_size(streamFile)- start_offset)/channel_count/2;
|
||
|
|
vgmstream->channels = channel_count;
|
||
|
|
vgmstream->sample_rate = read_32bitLE(0x1C,streamFile);
|
||
|
|
if (loop_flag) {
|
||
|
|
vgmstream->loop_start_sample = (read_32bitLE(0x10,streamFile))/channel_count/2;
|
||
|
|
vgmstream->loop_end_sample = (read_32bitLE(0xC,streamFile) - start_offset)/channel_count/2;
|
||
|
|
}
|
||
|
|
vgmstream->coding_type = coding_PCM16LE;
|
||
|
|
vgmstream->layout_type = layout_interleave;
|
||
|
|
vgmstream->interleave_block_size = 2;
|
||
|
|
vgmstream->meta_type = meta_OTM;
|
||
|
|
|
||
|
|
/* 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;
|
||
|
|
}
|
||
|
|
|