fe6595f006
Users of the mixer can use this information to determine which sources were included in the frame. Bug: webrtc:12745 Change-Id: I11a8e3b1f4e8f95eb870336cad8dd082330bdf02 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/217768 Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Minyue Li <minyue@webrtc.org> Reviewed-by: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Chen Xing <chxg@google.com> Commit-Queue: Doudou Kisabaka <doudouk@google.com> Cr-Commit-Position: refs/heads/master@{#34035}