commit f8e7ccb9679b542a183790ca0040ab616ca8718d
author Elad Alon <eladalon@webrtc.org> Thu Jan 24 11:38:36 2019
committer Commit Bot <commit-bot@chromium.org> Thu Jan 24 12:21:00 2019
tree b058c1e294f284d23c79440d15732520c591dec9
parent 2d0505017a9044e0529712b3cc5460ca32f71cc4

Create new RTCP feedback message - LossIndication

Create a new RTCP feedback message for reporting the loss and/or non-decodability of video frames, to be used by the upcoming injectable VideoFrameBufferController. The new feedback message should report:
1. The sequence number of the last decoded non-discardable video frame. (TBD: If a multi-packet frame, should it be the sequence number of the first, last, or any of the packets?)
2. The sequence number of the last received RTP packet in the stream.
3. A decodability flag, whose specific meaning depends on the last-received
   RTP sequence number. The decodability flag is true if and only if all of
   the frame's dependencies are known to be decodable, and the frame itself
   is not yet known to be unassemblable.
   * Clarification #1: In a multi-packet frame, the first packet's
     dependencies are known, but it is not yet known whether all parts
     of the current frame will be received.
   * Clarification #2: In a multi-packet frame, the dependencies would be
     unknown if the first packet was not received. Then, the packet will
     be known-unassemblable.

Bug: webrtc:10226
Change-Id: I1563c944477e3ed40235e82ab99a439414632aff
Reviewed-on: https://webrtc-review.googlesource.com/c/118931
Commit-Queue: Elad Alon <eladalon@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26387}