
This CL adds the ability to configure RTPSender to include the MID header extension when sending packets. The MID will be included on every packet at the start of the stream until an RTCP acknoledgment is received for that SSRC at which point it will stop being included. The MID will be included on regular RTP streams as well as RTX streams. Bug: webrtc:4050 Change-Id: Ie27ebee1cd00a67f2b931f5363788f523e3e684f Reviewed-on: https://webrtc-review.googlesource.com/60582 Commit-Queue: Steve Anton <steveanton@webrtc.org> Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22574}