tree bd6902b79d4c59176745a2ad7ee5f8d54a10c698
parent c72733dc955189e0f725c93ae4e76ee6486b0266
author Gustaf Ullberg <gustaf@webrtc.org> 1608041536 +0100
committer Commit Bot <commit-bot@chromium.org> 1608050284 +0000

Surface the number of encoded channels

Two audio channels going into the AudioSource::Sink can either be
down-mixed to mono or encoded as stereo. This change enables WebRTC
users (such as Chromium) to query the number of audio channels actually
encoded. That information can in turn be used to tailor the audio
processing to the number of channels actually encoded.

This change fixes webrtc:8133 from a WebRTC perspective and will be
followed up with the necessary Chromium changes.

Bug: webrtc:8133
Change-Id: I8e8a08292002919784c05a5aacb21707918809c8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/197426
Reviewed-by: Per Åhgren <peah@webrtc.org>
Reviewed-by: Magnus Flodman <mflodman@webrtc.org>
Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32836}