David Chen 195adeb38c Add FlexFEC-03 support to the SFU: upstream recovery and downstream generation ...

Implements FlexFEC-03 (RFC 8627) end to end in the SFU, in both directions:

- Upstream: decode FlexFEC repair packets from publishers and recover lost
  media in the receive buffer before forwarding (pkg/sfu/flexfec/decoder.go,
  pkg/sfu/buffer). Recovered packets are surfaced via Prometheus counters.
- Downstream: generate FlexFEC for subscribers off the downtrack, paced
  alongside media (pkg/sfu/downtrack_fec.go, pkg/sfu/pacer).
- Negotiation: advertise and match flexfec-03 in the media engine and
  transport SDP, gated by new config knobs (pkg/rtc, pkg/config,
  config-sample.yaml).
- Telemetry: livekit_fec_* metrics for sent/received/recovered packets
  (pkg/telemetry/prometheus/packets.go).

Tests: unit coverage for the decoder, buffer recovery, downtrack generation,
and transport negotiation, plus an end-to-end integration test and the
test-client support it needs (test/flexfec_test.go, test/client).

2026-06-15 13:41:04 -07:00

..

client.go

Add FlexFEC-03 support to the SFU: upstream recovery and downstream generation

2026-06-15 13:41:04 -07:00

datachannel_reader.go

fix data channel slow reader test (#3453)

2025-02-20 10:40:25 +08:00

datatrack_remote.go

chore: pin GH commits and switch to golangci-lint (#4444)

2026-04-11 13:04:22 -07:00

datatrack_writer.go

Data tracks (#4089)

2025-12-04 10:44:34 +05:30

trackwriter.go

chore: move codecs/mime stuff to protocol (#4255)

2026-01-20 20:54:32 +05:30