OpusTodo

Code

For IETF draft

• Code cleanup
  • Remove SKP_ prefixes
  • remove silk_ prefixes in file names
  • s/libcelt/celt/ ?
• Multi-channel signalling (done, needs more testing)
• Implement OPUS_RESET (done, untested)
• remove unnecessary float<->int conversions

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

Later

• 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

Spec

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

Other

• 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