tree 9100ea9e95be449c2858205b2df50aeb9dc8119d
parent d9b4f3330fdbe45ac74ba7c96c78512d99c0ef98
author Ilya Nikolaevskiy <ilnik@webrtc.org> 1558709400 +0200
committer Commit Bot <commit-bot@chromium.org> 1558711682 +0000

VP9 screenshare: drop base layer separately

Because of a low bitrate target, base layer has drops much more frequently
than other layers. But it reduces overall framerate, especially then
input framerate is low (5 fps).

This CL allows pre-layer drops and disables droppoing on higher spatial
layers for screenshare, solving the issue.
Additional care have to be taken then new spatial layers are enabled
dynamically to not create non-compatible with RTP references.

Bug: webrtc:10257
Change-Id: Ie056484c99a3f35ff4405ef71337dc2d034db8bb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/138262
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28063}