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Only enable conference mode simulcast allocations with flag enabled

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Non-conference mode simulcast screenshares were mistakenly using the
conference mode semantics in the simulcast rate allocator, which broke
spec compliant usage in some situation.

This behavior should only be used when explicitly using the SDP entry
"a=x-google-flag:conference" in both offer and answer.

Bug: webrtc:11310, chromium:1093819
Change-Id: Ibcba75c88a8405d60467546b33977a782e04e469
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/179081
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Commit-Queue: Florent Castelli <orphis@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31828}
This commit is contained in:
Florent Castelli
2020-07-24 17:29:40 +02:00
committed by Commit Bot
parent c878d68282
commit 32ca95145c
18 changed files with 71 additions and 32 deletions
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2
modules/video_coding/video_codec_initializer.cc
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@ -274,6 +274,8 @@ VideoCodec VideoCodecInitializer::VideoEncoderConfigToVideoCodec(
}
}
video_codec.legacy_conference_mode = config.legacy_conference_mode;
return video_codec;
}