mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-13 15:21:04 +01:00
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
|
|
/* a simple PS2 ADPCM format seen in Langrisser 3 */
|
|
VGMSTREAM * init_vgmstream_ivb(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
char filename[PATH_LIMIT];
|
|
off_t start_offset;
|
|
off_t stream_length;
|
|
|
|
int loop_flag = 0;
|
|
int channel_count;
|
|
|
|
/* check extension, case insensitive */
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
|
if (strcasecmp("ivb",filename_extension(filename))) goto fail;
|
|
|
|
/* check header */
|
|
if (read_32bitBE(0x00,streamFile) != 0x42564949) /* "BVII", probably */
|
|
goto fail; /* supposed to be "IIVB"*/
|
|
|
|
loop_flag = 0;
|
|
channel_count = 2;
|
|
|
|
/* 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_32bitBE(0x8,streamFile); /* big endian? */
|
|
vgmstream->coding_type = coding_PSX;
|
|
stream_length = read_32bitLE(0x04,streamFile);
|
|
start_offset = 0x10;
|
|
vgmstream->num_samples = stream_length*28/16;
|
|
|
|
vgmstream->layout_type = layout_none;
|
|
vgmstream->meta_type = meta_PS2_IVB;
|
|
|
|
/* open the file for reading */
|
|
{
|
|
int i;
|
|
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=start_offset+stream_length*i;
|
|
|
|
}
|
|
}
|
|
|
|
return vgmstream;
|
|
|
|
/* clean up anything we may have opened */
|
|
fail:
|
|
if (vgmstream) close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|