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#include <vorbis/codec.h>
#include <vorbis/vorbisfile.h>
#include <string.h>
#include <stdio.h>
#include "codec.h"
#include "cvorbis.h"
static FILE *file;
static OggVorbis_File vorbis_file;
static vorbis_info *vi;
static int cur_bit_stream;
int cvorbis_init (const char *fname) {
file = NULL;
vi = NULL;
cur_bit_stream = -1;
file = fopen (fname, "rb");
if (!file) {
return -1;
}
memset (&cvorbis.info, 0, sizeof (fileinfo_t));
ov_open (file, &vorbis_file, NULL, 0);
vi = ov_info (&vorbis_file, -1);
cvorbis.info.bitsPerSample = 16;
cvorbis.info.dataSize = ov_pcm_total (&vorbis_file, -1) * vi->channels * 2;
cvorbis.info.channels = vi->channels;
cvorbis.info.samplesPerSecond = vi->rate;
return 0;
}
void
cvorbis_free (void) {
if (file) {
ov_clear (&vorbis_file);
//fclose (file); -- ov_clear closes it
file = NULL;
vi = NULL;
}
}
int
cvorbis_read (char *bytes, int size)
{
if (!file)
return -1;
for (;;)
{
// read ogg
long ret=ov_read (&vorbis_file, bytes, size, 0, 2, 1, &cur_bit_stream);
if (ret < 0)
{
printf ("WARNING: ogg vorbis decoder tells error %x\n", ret);
memset (bytes, 0, size);
return -1;
}
else if (ret < size)
{
if (ret == 0) {
ov_raw_seek (&vorbis_file, 0);
}
size -= ret;
bytes += ret;
}
else {
break;
}
}
return 0;
}
codec_t cvorbis = {
.init = cvorbis_init,
.free = cvorbis_free,
.read = cvorbis_read
};
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