Used to find the most recent bitrate played back within the file. Will return 0 if the bitrate has not changed or it is the beginning of the file.
long ov_bitrate_instant(OggVorbis_File *vf);
Parameters
vf
A pointer to the OggVorbis_File structure--this is used for ALL the externally visible vorbisfile
functions.
Return Values
0 indicates the beginning of the file or unchanged bitrate info.
n indicates the actual bitrate since the last call.
OV_FALSE indicates that the call returned a 'false' status. In this case, this error code is returned if playback is not in progress, and thus there is no instantaneous bitrate information to report.