If room metadata is changed in between when a participant is joining and
when they've became active, that participant will not have the latest
room metadata.
* Integrate logger components
Dividing into the following components
* pub - publisher
* pub.sfu
* sub - subscriber
* transport
* transport.pion
* transport.cc
* api
* webhook
* update go modules
* Ability to use trailer with server injected frames
A 32-byte trailer generated per room.
Trailer appended when track encryption is enabled.
* E2EE trailer for server injected packets.
- Generate a 32-byte per room trailer. Too reasons for longer length
o Laziness: utils generates a 32 byte string.
o Longer length random string reduces chances of colliding with real data.
- Trailer sent in JoinResponse
- Trailer added to server injected frames (not to padding only packets)
* generate
* add a length check
* pass trailer in as an argument
* Full reconnect on publication mismatch on resume.
It is possible that publications mismatch on resume. An example sequence
- Client sends `AddTrack` for `trackA`
- Server never receives it due to signalling connection breakage.
- Client could do a resume (reconnect=1) noticing signalling connection
breakage.
- Client's view thinks that `trackA` is known to server, but server does
not know about it.
- A subsequence offer containing `trackA` triggers `trackInfo not
available before track publish` and the track does not get published.
Detect the case of missing track and issue a full reconnect.
* UpdateSubscriptions from sync state a la cloud
* add missing shouldReconnect
* Close participant on full reconnect.
A full reconnect == irrecoverable error. Participant cannot continue.
So, close the participant when issuing a full reconnect.
That should prevent subscription manager reconcile till the participant
is finally closed down when participant is stale.
* format
With subscription manager, there is no need to tell a publisher
about a subscriber going away. Before subscription manager,
the up track manager of a participant (i. e. the publisher side)
was holding a list of pending subscriptions for its published tracks
and that had to be cleaned up if one of the subscriber goes away.
That is not the case any more.
Also set publisherID early so that subscription permission update has
the right publisherID. In fact, saw an empty ID in the logs and saw
that we still have the disallowed subscription handling which is not
necessary any more.
* Support simualting subscriber bandwidth.
When non-zero, a full allocation is triggered.
Also, probes are stopped.
When set to zero, normal probing mechanism should catch up.
Adding `allowPause` override which can be a connection option.
* fix log
* allowPause in participant params
When a recorder is in the room, we would skip grace period due
to a bug with how LastLeftAt was set. This would cause RoomComposite
templates to exit immediately if the last participant in the room reconnects.
* Make connection quality not too optimistic.
With score normalization, the quality indicator showed good
under conditions which should have normally showed some badness.
So, a few things in this PR
- Do not normalize scores
- Pick the weakest link as the representative score (moving away from
averaging)
- For down track direction, when reporting delta stats, take the number
of packets sent actually. If there are holes in the feed (upstream
packet loss), down tracks should not be penalised for that loss.
State of things in connection quality feature
- Audio uses rtcscore-go (with a change to accommodate RED codec). This
follows the E-model.
- Camera uses rtcscore-go. No change here. NOTE: THe rtscore here is
purely based on bits per pixel per frame (bpf). This has the following
existing issues (no change, these were already there)
o Does not take packet loss, jitter, rtt into account
o Expected frame rate is not available. So, measured frame rate is
used as expected frame rate also. If expected frame rate were available,
the score could be reduced for lower frame rates.
- Screen share tracks: No change. This uses the very old simple loss
based thresholding for scoring. As the bit rate varies a lot based on
content and rtcscore video algorithm used for camera relies on
bits per pixel per frame, this could produce a very low value
(large width/height encoded in a small number of bits because of static content)
and hence a low score. So, the old loss based thresholding is used.
* clean up
* update rtcscore pointer
* fix tests
* log lines reformat
* WIP commit
* WIP commit
* update mute of receiver
* WIP commit
* WIP commit
* start adding tests
* take min score if quality matches
* start adding bytes based scoring
* clean up
* more clean up
* Use Fuse
* log quality drop
* clean up debug log
* - Use number of windows for wait to make things simpler
- track no layer expected case
- always update transition
- always call updateScore
When we unsubscribe from a speaker, SendSpeakerUpdates will drop updates
from that speaker. This has the side effect of dropping the "clearing"
message that we are sending as well.
UpdateSubscription had a shortcoming where when it couldn't find the
participant, it ignored the request.
This PR further removes the reliance of current publisher state from
subscribers.
- SubscribeToTrack only takes in a trackID
- Introduced RoomTrackManager to maintain all published tracks to a room
- Added TrackUnpublished event to clearly indicate when a track has been removed
- SubscribeRequested event no longer include information about the publisher
Added a new manager to handle all subscription needs. Implemented using reconciler pattern. The goals are:
improve subscription resilience by separating desired state and current state
reduce complexity of synchronous processing
better detect failures with the ability to trigger full reconnect
* initial commit
* add correct label
* clean up
* more cleanup on adding stats
* cleanup
* move things to pub and sub monitors, ensure stats are correctly updated
* fix merge conflict
* Fix panic on MacOS (#1296)
* fixing last feedback
Co-authored-by: Raja Subramanian <raja.gobi@tutanota.com>
David Zhao