commit 75fd127640bdf1729af6b4a25875e6d01f1570e0
author Erik Språng <sprang@webrtc.org> Wed Jun 24 14:52:20 2020
committer Commit Bot <commit-bot@chromium.org> Wed Jun 24 16:59:50 2020
tree b49daf4321c05582aab6b95f2871dd4fbce814d9
parent 29d59a14024890d731633c34a621140d167fc64d

Allows FEC generation after pacer step.

Split out from https://webrtc-review.googlesource.com/c/src/+/173708
This CL enables FEC packets to be generated as media packets are sent,
rather than generated, i.e. media packets are inserted into the fec
generator after the pacing stage rather than at packetization time.

This may have some small impact of performance. FEC packets are
typically only generated when a new packet with a marker bit is added,
which means FEC packets protecting a frame will now be sent after all
of the media packets, rather than (potentially) interleaved with them.
Therefore this feature is currently behind a flag so we can examine the
impact. Once we are comfortable with the behavior we'll make it default
and remove the old code.

Note that this change does not include the "protect all header
extensions" part of the original CL - that will be a follow-up.

Bug: webrtc:11340
Change-Id: I3fe139c5d53968579b75b91e2612075451ff0f5d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/177760
Commit-Queue: Erik Språng <sprang@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31558}