* Set publisher codec preferences after setting remote description
Munging SDP prior to setting remote description was becoming problematic
in single peer connection mode. In that mode, it is possible that a
subscribe track m-section is added which sets the fmtp of H.265 to a
value that is different from when that client publishes. That gets
locked in as negotiated codecs when pion processes remote description.
Later when the client publishes H.265, the H.265 does only partial
match. So, if we munge offer and send it to SetRemoteDescription, the
H.265 does only a partial match due to different fmtp line and that gets
put at the end of the list. So, the answer does not enforce the
preferred codec. Changing pion to put partial match up front is more
risky given other projects. So, switch codec preferences to after remote
description is set and directly operate on transceiver which is a better
place to make these changes without munging SDP.
This fixes the case of
- firefox joins first
- Chrome preferring H.265 joining next. This causes a subscribe track
m-section (for firefox's tracks) to be created first. So, the
preferred codec munging was not working. Works after this change.
* clean up
* mage generate
* test
* clean up
- Move downTrack instantiation to SubscribedTrack as it should own that
DownTrack. Still more to do here as `DownTrack` is fetched from
`SubscribedTrack` in a few places and used. Would like to avoid that,
but doing this initially.
- Use an interface from sfu.Downtrack and replace a bunch of callbacks.
SubscribedTrack is the implementation for DownTrackListener.
* Do not send both asb-send-time and twcc.
In single peer connection mode, both extensions are set on the media
engine and both would be negotiated. Unfortunately, pion/webrtc does
not yet support RTPSender.SetParameters() which would allow setting
specific header extensions for the sender. So, check for TWCC enabled
and use it. If not, do abs-send-time if that is enabled.
* check BWE type
* comment
Not sure why only that was applying from req which is effectively a
no-op as the clone is a replica of the req. Guess, it was a typo/miss.
Change it to use room preset config value.
* Handle migration better in single peer connection case.
Have to avoid creating a sender for publish tracks.
Otherwise, the sender messes up the answer SDP because
it forced to inactive and that gets used by type match when setting
remote description offer.
Create sender only for m-lines which was used to send.
* remove unnecessary RemoveTrack
Was breaking migration in cases where there was inactive transceivers
because of direction check.
This change will break single peer connection case, but can look at that
one later.
* WIP
* check using protocol version
* revert
* clean up
* sdp cid argument
* WIP
* WIP
* test
* clean up
* clean up
* fixes
* clean up
* clean up
* clean up
* conditional checks
* tests for both dual and single peer connection
* test
* test
* test
* type check
* test
* todo
* munges
* combined config
* populate mid
* limit to receive only
* clean up
* clean up
* clean up
* older test
* clean up
* alternative audio codec
* dtx
* don't need to copy
* Anunay feedback
* use the available peer connection
* publisher check
* WIP
* WIP
* WIP
* no mid
* media sections requirement
* mage generate
* WIP
* WIP
* set data channel receive size for test
* handle early media better
* WIP
* do not do ICERestart if no subscriber
* WIP
* WIP
* WIP
* WIP
* WIP
* WIP
* start up subscriber RTCP worker
* WIP
* WIP
* clean up
* clean up
* flag to indicate use of single peer connection
* remove unused interface method
* clean up
* clean up
* Jie feedback #1
* deps
* do not access subscriber in one shot mode
* more places for one shot mode
* more one shot fixes
* deps
* deps
* test
* Handle no codecs in track info.
Not sure how it happens, but seeing a panic caused by no codecs in track
info. Avoiding that and logging information when it happens.
* log request
* Populate SDP cid in track info when available.
- Adding SDP cid to TrackInfo. Browsers like FF uses a different stream
id for AddTrack and actual SDP offer. So, have to look up using both
on server side. To make it easier, store both (only if different) in
TrackInfo.
- Use a codec in TrackInfo for audio also. There is some discussion
around doing simulcast codec for audio so that something like PSTN can
use G.711 without any transcoding. So, just keep it consistent between
audio and video.
- Populate SDP cid when SDP offer is received. It could populate a
pending track or an already published track if the new offer is for a
back up codec where the primary codec is already published.
- Passed around parsed offer to more places to avoid parsing multiple
times.
- Clean up MediaTrack interface a bit and remove unneeded methods.
* WIP
* WIP
* deps
* stream allocator mime aware
* clean up
* populate SDP cid before munging
* interface methods
* Send `participant_connection_aborted` when participant session is closed
without becoming `ACTIVE`.
There is one sticky case. If there is a migration and the migration
fails, this will send `participant_connection_aborted` even though the
participant may have connected properly on the previous node.
* depsg
Proper message id checks.
Some refactoring for common code in rtcv2service handlers.
Instantiate signalling based on synchronous local candidates flag, but
needs better defined code.
