Add a feature (gated by field trial) that stores
packets with unknown ssrc in a circular buffer
and replays them once a receive stream with matching
ssrc is created.
This improves situation where media is incoming
but signaling or SetFrameDecryptor is slow.
BUG=webrtc:10405
Change-Id: I7c7b2f4bd96c942c09e96db0cdae4ce5efef2541
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/127543
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27159}
