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* Add upstream FlexFEC recovery support * Guard short TWCC extensions in FEC packets * Release completed FlexFEC states * Validate FlexFEC payload type range * Invoke FEC callbacks after unlocking * Reduce FlexFEC protection state allocations * Avoid allocations for complete FlexFEC packets * Optimize ordered FlexFEC packet insertion * Reuse RTP packet storage for FlexFEC recovery * Limit pending FlexFEC repair packets * Lower FlexFEC repair window to two seconds * Harden upstream FlexFEC handling * Test FlexFEC with E2EE media * Fix FlexFEC negotiation with libwebrtc publishers * Enhance payload length validation in decoder Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * remove the ability to configure payload type for FlexFEC * moved some helpers into protocol * Handle big gaps in media sequence numbers Reset buffers when a big gap in media sequence numbers is detected. Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * bump protocol & psrpc deps * Handle FEC packet recovery failure Increment FEC packets discarded counter and remove packet. Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * do not NACK on fec recovered packet (#4896) * do not NACK on fec recovered packet * fix test race in CI * Fix FEC write return after merging RTX feedback changes * PR fixes for FlexFEC implementation (#4898) * do not NACK on fec recovered packet * refactor common code into unlockAndInvokeFECRecovery * add FEC stats to RTPStats * add log for when fecdecoder unavailable after creation * rename markAsFECRepair to setFECRepairBufferLimit for clarity * refactor packet generation for tests into util * fix test race in CI * move the unlocks back inline for readability * update RTPstats * Fix FEC write return after merging RTX feedback changes * Use shared RTP packet helper in merged FEC NACK test * Remove redundant return from FEC write handler * packet post process (#5020) * packet post process * remove redundant writeRTX * send out RTCP (NACK and RR) from packetPostProcess only * handle FEC decoder on receiver restart (#5032) * handle FEC decoder on receiver restart * move onStreamRestartLocked into BufferBaseParams --------- Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> Co-authored-by: Raja Subramanian <raja.gobi@tutanota.com>