int main(int argc, char *argv[]) {
FILE *f = fopen(argv[1], "rb");
OggReader *reader = oggreader_open(f);
BitstreamReader *packet = bs_substream_new(BS_LITTLE_ENDIAN);
ogg_status result;
do {
result = oggreader_next_packet(reader, packet);
if (result < 0) {
fprintf(stderr, "Error : %s\n", ogg_error(result));
} else if (result == OGG_OK) {
printf("packet size %u\n", packet->input.substream->buffer_size);
}
} while (result == OGG_OK);
packet->close(packet);
oggreader_close(reader);
fclose(f);
return 0;
}
static int OGG_open(Sound_Sample *sample, const char *ext)
{
int rc;
double total_time;
OggVorbis_File *vf;
vorbis_info *info;
Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
vf = (OggVorbis_File *) malloc(sizeof (OggVorbis_File));
BAIL_IF_MACRO(vf == NULL, ERR_OUT_OF_MEMORY, 0);
rc = ov_open_callbacks(internal->rw, vf, NULL, 0, RWops_ogg_callbacks);
if (rc != 0)
{
#if (defined DEBUG_CHATTER)
SNDDBG(("OGG: can't grok data. reason: [%s].\n", ogg_error(rc)));
#endif
free(vf);
BAIL_MACRO("OGG: Not valid Ogg Vorbis data.", 0);
} /* if */
info = ov_info(vf, -1);
if (info == NULL)
{
ov_clear(vf);
free(vf);
BAIL_MACRO("OGG: failed to retrieve bitstream info", 0);
} /* if */
output_ogg_comments(vf);
SNDDBG(("OGG: bitstream version == (%d).\n", info->version));
SNDDBG(("OGG: bitstream channels == (%d).\n", info->channels));
SNDDBG(("OGG: bitstream sampling rate == (%ld).\n", info->rate));
SNDDBG(("OGG: seekable == {%s}.\n", ov_seekable(vf) ? "TRUE" : "FALSE"));
SNDDBG(("OGG: number of logical bitstreams == (%ld).\n", ov_streams(vf)));
SNDDBG(("OGG: serial number == (%ld).\n", ov_serialnumber(vf, -1)));
SNDDBG(("OGG: total seconds of sample == (%f).\n", ov_time_total(vf, -1)));
internal->decoder_private = vf;
sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
sample->actual.rate = (uint32_t) info->rate;
sample->actual.channels = (uint8_t) info->channels;
total_time = ov_time_total(vf, -1);
if (OV_EINVAL == total_time)
internal->total_time = -1;
else
internal->total_time = (int32_t)(total_time);
/*
* Since we might have more than one logical bitstream in the OGG file,
* and these bitstreams may be in different formats, we might be
* converting two or three times: once in vorbisfile, once again in
* SDL_sound, and perhaps a third time to get it to the sound device's
* format. That's wickedly inefficient.
*
* To combat this a little, if the user specified a desired format, we
* claim that to be the "actual" format of the collection of logical
* bitstreams. This means that VorbisFile will do a conversion as
* necessary, and SDL_sound will not. If the user didn't specify a
* desired format, then we pretend the "actual" format is something that
* OGG files are apparently commonly encoded in.
*/
sample->actual.format = (sample->desired.format == 0) ?
AUDIO_S16SYS : sample->desired.format;
return(1);
} /* OGG_open */
