From XiphWiki
Revision as of 14:17, 16 September 2011 by Jmspeex (talk | contribs)
Jump to navigation Jump to search


For IETF draft

  • Code cleanup (any left?)
  • Multi-channel signalling (done, needs more testing)

SILK issues

  • PLC buffer not fully initialized (fix needs verifying)
  • Mid and side using different sampling rates (fix needs verifying)
  • LLBR stereo issue (has a proposed fix)
    • Introduces prefill bug (fixed on greg's tree)
  • Artefacts on SILK mono<->stereo switching
  • Artefacts on SILK frame size switching (e.g. 960,480 glitches)
  • Use of signed overflow (undefined in C), intentionally and otherwise.
  • Encoder triggers DTX randomly (even if not enabled) for 40/60 ms stereo frames
  • CLANG ARITHMETIC UNDEFINED at <silk/silk_NSQ_del_dec.c, (652:33)> : Op: *, Reason : Signed Multiplication Overflow, BINARY OPERATION: left (int32): 90005 right (int32): -25578
    • Same in NSQ.c: line 408
    • Same in decode_core.c: line 152
  • Review Tim's "LSB with no pulses" fix


  • Exposed CELT constrained VBR
  • Fixed-point build
  • Fix build system (right now it fails to build shared libraries, drops .o files all over)
  • Floating point API
  • Usable command-line tools (opus is a major regression from libcelt right now)
  • Smart automatic mode decision
  • psymodel based VBR
  • Remove copy in inverse MDCT
  • Save some float<->int conversions


  • Finish codec draft
  • Ogg mapping (including multi-channel). See: OggOpus
  • RTP payload format


  • Logo
  • Test vectors
  • Listening tests
  • Documentation (at a minimum every exported symbol should have complete and accurate documentation)
  • Add content to opus-codec.org
  • Oggz-validate (should also validate opus toc)
    • The above documentation
    • Presentations
    • Examples and test results (hyperlink to Monty's demo, gmaxwell's HA results page, etc)
  • Useful example software (e.g. streaming software that works correctly) (opus-tools in xiph git)
    • Support for resampling in tools

Third party software

  • Support in ekiga
  • Support in mumble
  • Support in asterisk
  • Support in firefox (rtcweb and in ogg)
  • Support in VLC
  • Support in ogg123
  • Support in ffmpeg
  • Support in rockbox
  • Support in foobar2000
  • Support in gstreamer
  • Support in mplayer
  • Support in xmms
  • Support in oggdsf
  • Support in xiphqt