* Use VP9 Key frame detection from Galene.
With ffmpeg generated VP9 file with single layer
and publishing via Go SDK, the key picture determination
outlined at https://datatracker.ietf.org/doc/html/draft-ietf-payload-vp9-16#page-13
under the F bit explanation does not work. It declares kay frame for
pretty much all frames. Unclear if ffmpeg generated bitstream has issues
or if that procedure in the above document does not work for single
layer case.
Using the bit stream explained here
https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp9-bitstream-specification-v0.6-20160331-draft.pdf
(pages 28, 62, 63) implemented in Galene.
That is more expensive as it has to parse more, but works in all cases.
* Add AV1-TODo
* add some TODOs
* Simplifying (hopefully) sfu.DownTrack
* Remove unnecessary check as pdding only packets are dropped before that check
* Temporal filtering max layer
* - Split out forwarder bits into a separate structure
- Address comments from Jie and David
* Remove debug and unneeded stuff
* Fix test
* Remove unneeded default initialization
* Separate from ion-sfu
changes:
1. extract pkg/buffer, twcc, sfu, relay, stats, logger
2. to solve cycle import, move ion-sfu/pkg/logger to pkg/sfu/logger
3. replace pion/ion-sfu => ./
reason: will change import pion/ion-sfu/pkg/* to livekit-server/pkg/*
after this pr merged. Just not change any code in this pr, because it
will confused with the separate code from ion-sfu in review.
* Move code from ion-sfu to pkg/sfu
* fix build error for resovle conflict
Co-authored-by: cnderrauber <zengjie9004@gmail.com>
