Commits on Nov 27, 2024

1. Update stereo opus test to expect upmixing. …

   Update the test that sends and receives a local mono track with opus
   that on the remote side the channelCount is 2 because the opus decoder
   performs upmixing.
   
   This strange behavior is option 1) discussed in
   w3c/webrtc-pc#3010. This allows for some
   optimization and simplifications which aids in virtual audio SSRC use
   case of flip-flopping between mono and stereo signals on the wire and
   not having to re-initialize the decoder (which could cause glitches).
   
   The vibe from the November Virtual Interim
   (https://www.w3.org/2024/11/19-webrtc-minutes.html#561c) was to
   standardize what libwebrtc does when stereo is enabled, and this is
   what it does.
   
   Note: We still fail the test today though because "stereo opus" has not
   been enabled-by-default. When it is the expectation is that we pass
   both of these tests.
   
   Bug: webrtc:379996136
   Change-Id: Ibd6ee91a59d7c673bf53ad2302ba33f16b8b4ede
   Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6049355
   Reviewed-by: Harald Alvestrand <[email protected]>
   Commit-Queue: Henrik Boström <[email protected]>
   Cr-Commit-Position: refs/heads/main@{#1388674}

   

   henbos authored and chromium-wpt-export-bot committed Nov 27, 2024
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