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Allow empty video layer allocation extension

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This patch adds support for sending zero video layer allocations
header extensions. This can be used to signal that a stream is
turned off.

Bug: webrtc:12000
Change-Id: Id18fbbff2216ca23179c58ef7bbe2ebea5e242af
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/212743
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33541}
This commit is contained in:
Jonas Oreland
2021-03-23 11:11:56 +01:00
committed by Commit Bot
parent fa4db49532
commit 93ee168671
3 changed files with 41 additions and 9 deletions
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docs/native-code/rtp-hdrext/video-layers-allocation00/README.md
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@ -80,3 +80,5 @@ extension size. Encoded (width - 1), 16-bit, (height - 1), 16-bit, max frame
rate 8-bit per spatial layer per RTP stream. Values are stored in (RTP stream
id, spatial id) ascending order.
An empty layer allocation (i.e nothing sent on ssrc) is encoded as
special case with a single 0 byte.