Reason for revert: Fix RtpStreamReceiver to not recover RTX packets with incorrect SSRC. Original issue's description: > Revert of Only compare sequence numbers from the same SSRC in ForwardErrorCorrection. (patchset #5 id:120001 of https://codereview.webrtc.org/2893293003/ ) > > Reason for revert: > Breaks fuzzer. > > Original issue's description: > > Only compare sequence numbers from the same SSRC in ForwardErrorCorrection. > > > > Prior to this CL, the ForwardErrorCorrection state would be reset whenever > > the difference in sequence numbers of the last recovered media packet > > and the new packet (media or FEC) was too large. This comparison did not > > take into account that FlexFEC uses a different SSRC for the FEC packets, > > meaning that the the state would be reset very frequently when FlexFEC > > is used. This should not have led to any major problems, except for a > > decreased decoding efficiency. > > > > This CL verifies that whenever we compare sequence numbers in > > ForwardErrorCorrection, they do indeed belong to the same SSRC. > > > > BUG=webrtc:5654 > > > > Review-Url: https://codereview.webrtc.org/2893293003 > > Cr-Commit-Position: refs/heads/master@{#18399} > > Committed:1476a9d789> > TBR=stefan@webrtc.org,holmer@google.com > # Not skipping CQ checks because original CL landed more than 1 days ago. > BUG=webrtc:5654 > > Review-Url: https://codereview.webrtc.org/2919313005 > Cr-Commit-Position: refs/heads/master@{#18446} > Committed:92732ecc5cR=stefan@webrtc.org BUG=webrtc:5654 Review-Url: https://codereview.webrtc.org/2918333002 Cr-Commit-Position: refs/heads/master@{#18827}