mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-15 08:01:15 +01:00
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
#include "meta.h"
|
|
#include "../layout/layout.h"
|
|
#include "../util.h"
|
|
|
|
/* STR (Future Cop L.A.P.D.) */
|
|
VGMSTREAM * init_vgmstream_psx_mgav(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
off_t start_offset;
|
|
off_t current_chunk;
|
|
char filename[PATH_LIMIT];
|
|
int loop_flag = 0;
|
|
int channel_count;
|
|
int dataBuffer = 0;
|
|
int i;
|
|
|
|
/* check extension, case insensitive */
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
|
if (strcasecmp("str",filename_extension(filename))) goto fail;
|
|
|
|
/* check header */
|
|
if (read_32bitBE(0x00,streamFile) != 0x52565753) /* "RVWS" */
|
|
goto fail;
|
|
|
|
loop_flag = 1;
|
|
channel_count = 2;
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count,loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
/* fill in the vital statistics */
|
|
start_offset = read_32bitLE(0x4,streamFile);
|
|
vgmstream->channels = channel_count;
|
|
vgmstream->sample_rate = 16000;
|
|
vgmstream->coding_type = coding_PSX;
|
|
vgmstream->layout_type = layout_psx_mgav_blocked;
|
|
vgmstream->meta_type = meta_PSX_MGAV;
|
|
|
|
/* open the file for reading */
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
|
|
// calculate samples
|
|
current_chunk = start_offset;
|
|
vgmstream->num_samples = 0;
|
|
while ((current_chunk + start_offset) < (get_streamfile_size(streamFile)))
|
|
{
|
|
dataBuffer = (read_32bitBE(current_chunk,streamFile));
|
|
if (dataBuffer == 0x4D474156) /* "MGAV" */
|
|
{
|
|
psx_mgav_block_update(start_offset,vgmstream);
|
|
vgmstream->num_samples += vgmstream->current_block_size/16*28;
|
|
current_chunk += vgmstream->current_block_size + 0x1C;
|
|
}
|
|
current_chunk += 0x10;
|
|
}
|
|
|
|
|
|
if (loop_flag) {
|
|
vgmstream->loop_start_sample = 0;
|
|
vgmstream->loop_end_sample = vgmstream->num_samples;
|
|
}
|
|
|
|
|
|
return vgmstream;
|
|
|
|
/* clean up anything we may have opened */
|
|
fail:
|
|
if (vgmstream) close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|