OpusTodo: Difference between revisions

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== Code ==
== 1.1-beta ==


=== For IETF draft ===
* Tune mode switching decisions
* Multi-channel signalling (done, needs more testing)
** <s>Use SILK up to higher rates on voice</s>
* Make opus-compare fail for single seriously trashed frames?
** <s>Adapt stereo SILK/CELT threshold based on stereo width</s>
* Tune hybrid rate allocation?
* Figure out how to use speech/music detection optimally
** find optimal switching time (low energy/tonality)
* Improve variable frame size
* Tune transient detector?
* Use ALLOC in tonality analysis
* LOTS of testing


== SILK issues ==
* <s>CLANG ARITHMETIC UNDEFINED at <silk/decode_core.c, (108:40)> : Op: *, Reason : Signed Multiplication Overflow, BINARY OPERATION: left (int32): 916258817 right (int32): -3 </s>
* <s>CLANG ARITHMETIC UNDEFINED at <silk/decode_core.c, (108:40)> : Op: +, Reason : Signed Addition Overflow, BINARY OPERATION: left (int32): -418535217 right (int32): -1832517634</s>
=== Later ===
* Usable command-line tools (<s>opus is a major regression from libcelt right now</s>)
* Smart automatic mode decision
* psymodel based VBR
* Remove copy in inverse MDCT
* Save some float<->int conversions


== Spec ==
== Spec ==
* Ogg mapping. See [[http://tools.ietf.org/html/draft-ietf-codec-oggopus IETF draft]]
* Matroska mapping. See: [[MatroskaOpus]]
* RTP payload format See [[http://tools.ietf.org/html/draft-spittka-payload-rtp-opus IETF draft]]


* Finish codec draft
== Website ==
* Ogg mapping (including multi-channel). See: [[OggOpus]]
* De-uglify webpage - some suggestions: write about codecs obsoleted by OPUS (Speex, CELT, Vorbis(?), and the prop. ones), write about implementations (is there only one so far?), comparison table (Opus, Vorbis, Speex, ..., MP5) of features (channels, freq, bits per sample, license, language (C89), integer impl. (Vorbis decoder only, Opus YES, ...), future use in video files (Theora? Dirac? WebM? other future codecs...), audio files for storage (like Vorbis, no raw Opus defined, only inside OGG), ...  
* RTP payload format
* Promotional material (some nice free or Public domain sounds in Opus format)


== Other ==
== 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)
* 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)


== Opus-tools ==
== Opus-tools ==
* Build infrastructure (e.g. autotools)
* A simple real time streaming example tool
* A simple real time streaming example tool
* Multichannel support
* Replaygain (half done— needs a gain tool)
* Replaygain
* Testing (incl. jenkins automation)


== Third party software ==
== Experiments ==
* Support in ekiga
 
* Support in mumble
* Test exp_analysis and void_my_warranty.patch
* Support in asterisk
 
* Support in firefox (rtcweb and in ogg)
== Future work ==
* Support in VLC
* psymodel based VBR
* Support in ogg123
* Remove copy in inverse MDCT
* Support in ffmpeg
* Save some float<->int conversions
* Support in rockbox
* Improvements to LP mode CBR (greg has some code)
* Support in foobar2000
* Better handling for the case where FEC has a different bandwidth than the current mode
* Support in gstreamer
* PLC transitions on unprotected SILK-SILK bandwidth changes?
* Support in mplayer
* Support in xmms
* Support in oggdsf
* Support in xiphqt

Revision as of 06:20, 10 April 2013

1.1-beta

  • Tune mode switching decisions
    • Use SILK up to higher rates on voice
    • Adapt stereo SILK/CELT threshold based on stereo width
  • Tune hybrid rate allocation?
  • Figure out how to use speech/music detection optimally
    • find optimal switching time (low energy/tonality)
  • Improve variable frame size
  • Tune transient detector?
  • Use ALLOC in tonality analysis
  • LOTS of testing


Spec

Website

  • De-uglify webpage - some suggestions: write about codecs obsoleted by OPUS (Speex, CELT, Vorbis(?), and the prop. ones), write about implementations (is there only one so far?), comparison table (Opus, Vorbis, Speex, ..., MP5) of features (channels, freq, bits per sample, license, language (C89), integer impl. (Vorbis decoder only, Opus YES, ...), future use in video files (Theora? Dirac? WebM? other future codecs...), audio files for storage (like Vorbis, no raw Opus defined, only inside OGG), ...
  • Promotional material (some nice free or Public domain sounds in Opus format)

Other

  • Oggz-validate (should also validate opus toc)

Opus-tools

  • A simple real time streaming example tool
  • Replaygain (half done— needs a gain tool)

Experiments

  • Test exp_analysis and void_my_warranty.patch

Future work

  • psymodel based VBR
  • Remove copy in inverse MDCT
  • Save some float<->int conversions
  • Improvements to LP mode CBR (greg has some code)
  • Better handling for the case where FEC has a different bandwidth than the current mode
  • PLC transitions on unprotected SILK-SILK bandwidth changes?
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