commit 3f2634eadc8c1109f73fb24eec7635ca9fc74e48
author Sergey Silkin <ssilkin@webrtc.org> Mon Nov 06 10:49:19 2017
committer Commit Bot <commit-bot@chromium.org> Tue Nov 07 16:34:20 2017
tree eb1d1b2a7cfaf02ff453ebad5dd5c589be691b83
parent 2732bf5f20878885ef90b7a7a04cbfd1b9314cca

Reland "Keep spatial_idx=kNoSpatialIdx(255) if there is no layer indices."

This is a reland of 47836b4ebb8a5c71695b5ec07bffd5ee4e3bc2ff

Internal tests are synced with the fix.

Original change's description:
> Keep spatial_idx=kNoSpatialIdx(255) if there is no layer indices.
> 
> spatial_idx is not present in RTP header if there is no temporal or
> spatial layering. But the parser sets spatial_idx to 0 in this case.
> When reflector repacketizes such packets it writes layering indices
> into outgoing packets. When packets arrive to receiver it thinks that
> it deals with multi layer stream and passes it through special path
> in Vp9 reference frame finder which never outputs inter frames.
> 
> I modified the parser such that it keeps spatial_idx=kNoSpatialIdx(255)
> when there is no layer indices in RTP header. Related unit tests have
> been modified as well.
> 
> Bug: none
> Change-Id: I14498cafb4e57797577dc873298c35b243479f88
> Reviewed-on: https://webrtc-review.googlesource.com/17980
> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
> Reviewed-by: Erik Språng <sprang@webrtc.org>
> Reviewed-by: Åsa Persson <asapersson@webrtc.org>
> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#20560}

TBR=brandtr@webrtc.org,asapersson@webrtc.org,sprang@webrtc.org

Bug: none
Change-Id: I6087a8b20a926296b30432d69251670120b2a20c
Reviewed-on: https://webrtc-review.googlesource.com/20940
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20591}