[stable-25.0.x] fix(call): restore call audio mode after audio focus interruptions - #6566
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The audio focus change listener in WebRtcAudioManager only logged changes. A transient focus holder such as the telephony stack switches the global audio mode and restores its own saved mode on release, clobbering MODE_IN_COMMUNICATION. After an incoming GSM call the Talk call therefore continued without hardware echo cancellation and proper VoIP routing: remote parties heard echo, quiet audio, or nothing until the call was restarted. - Re-assert MODE_IN_COMMUNICATION and the selected audio route when focus returns after a transient loss (new AudioFocusState tracks this) - Request focus with AUDIOFOCUS_GAIN via AudioFocusRequest (voice communication attributes, delayed gain accepted) instead of the deprecated AUDIOFOCUS_GAIN_TRANSIENT hint meant for short use - Abandon focus via abandonAudioFocusRequest on stop Fixes #6541 Assisted-by: opencode:ox-alpha Signed-off-by: Tarek Loubani <tarek@tarek.org>
AndyScherzinger
approved these changes
Aug 24, 2026
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Backport of PR #6546