Chris@1: Error return codes possible from libvorbis and libvorbisfile:
Chris@1: 
Chris@1: All 'failure' style returns are <0; this either indicates a generic
Chris@1: 'false' value (eg, ready?  T or F) or an error condition.  Code can
Chris@1: safely just test for < 0, or look at the specific return code for more
Chris@1: detail.
Chris@1: 
Chris@1: *** Return codes:
Chris@1: 
Chris@1: OV_FALSE        The call returned a 'false' status (eg, ov_bitrate_instant 
Chris@1: 		can return OV_FALSE if playback is not in progress, and thus 
Chris@1: 		there is no instantaneous bitrate information to report.
Chris@1: 
Chris@1: OV_HOLE		libvorbis/libvorbisfile is alerting the application that 
Chris@1: 		there was an interruption in the data (one of: garbage 
Chris@1: 		between pages, loss of sync followed by recapture, or a 
Chris@1: 		corrupt page)
Chris@1: 
Chris@1: OV_EREAD        A read from media returned an error.
Chris@1: 
Chris@1: OV_EFAULT       Internal logic fault; indicates a bug or heap/stack 
Chris@1: 		corruption.
Chris@1: 
Chris@1: OV_EIMPL        The bitstream makes use of a feature not implemented in this 
Chris@1: 		library version.
Chris@1: 
Chris@1: OV_EINVAL       Invalid argument value.
Chris@1: 
Chris@1: OV_ENOTVORBIS	Bitstream/page/packet is not Vorbis data.
Chris@1: 
Chris@1: OV_EBADHEADER   Invalid Vorbis bitstream header.
Chris@1: 
Chris@1: OV_EVERSION	Vorbis version mismatch.
Chris@1: 
Chris@1: OV_ENOTAUDIO	Packet data submitted to vorbis_synthesis is not audio data.
Chris@1: 
Chris@1: OV_EBADPACKET	Invalid packet submitted to vorbis_synthesis.
Chris@1: 
Chris@1: OV_EBADLINK	Invalid stream section supplied to libvorbis/libvorbisfile, 
Chris@1: 		or the requested link is corrupt. 
Chris@1: 
Chris@1: OV_ENOSEEK	Bitstream is not seekable.
Chris@1: 
Chris@1: 
Chris@1: ****************************************************************
Chris@1: *** Libvorbis functions that can return failure/error codes:
Chris@1: 
Chris@1: int vorbis_analysis_headerout()
Chris@1:     OV_EIMPL
Chris@1: 
Chris@1: int vorbis_analysis_wrote()
Chris@1:     OV_EINVAL
Chris@1: 
Chris@1: int vorbis_synthesis_headerin()
Chris@1:     OV_ENOTVORBIS, OV_EVERSION, OV_EBADHEADER
Chris@1: 
Chris@1: int vorbis_synthesis()
Chris@1:     OV_ENOTAUDIO, OV_EBADPACKET
Chris@1: 
Chris@1: int vorbis_synthesis_read()
Chris@1:     OV_EINVAL
Chris@1: 
Chris@1: ****************************************************************
Chris@1: *** Libvorbisfile functions that can return failure/error codes:
Chris@1: 
Chris@1: int ov_open_callbacks()   
Chris@1:     OV_EREAD, OV_ENOTVORBIS, OV_EVERSION, OV_EBADHEADER, OV_FAULT
Chris@1: 
Chris@1: int ov_open()
Chris@1:     OV_EREAD, OV_ENOTVORBIS, OV_EVERSION, OV_EBADHEADER, OV_FAULT
Chris@1: 
Chris@1: long ov_bitrate()
Chris@1:     OV_EINVAL, OV_FALSE
Chris@1: 
Chris@1: long ov_bitrate_instant()
Chris@1:     OV_FALSE
Chris@1: 
Chris@1: ogg_int64_t ov_raw_total()
Chris@1:     OV_EINVAL
Chris@1: 
Chris@1: ogg_int64_t ov_pcm_total()
Chris@1:     OV_EINVAL
Chris@1: 
Chris@1: double ov_time_total()
Chris@1:     OV_EINVAL
Chris@1: 
Chris@1: int ov_raw_seek()
Chris@1:     OV_ENOSEEK, OV_EINVAL, OV_BADLINK
Chris@1: 
Chris@1: int ov_pcm_seek_page()
Chris@1:     OV_ENOSEEK, OV_EINVAL, OV_EREAD, OV_BADLINK, OV_FAULT
Chris@1: 
Chris@1: int ov_pcm_seek()
Chris@1:     OV_ENOSEEK, OV_EINVAL, OV_EREAD, OV_BADLINK, OV_FAULT
Chris@1: 
Chris@1: int ov_time_seek()
Chris@1:     OV_ENOSEEK, OV_EINVAL, OV_EREAD, OV_BADLINK, OV_FAULT
Chris@1: 
Chris@1: int ov_time_seek_page()
Chris@1:     OV_ENOSEEK, OV_EINVAL, OV_EREAD, OV_BADLINK, OV_FAULT
Chris@1: 
Chris@1: long ov_read()
Chris@1:     OV_HOLE, OV_EBADLINK