Commit 5276e23c authored Jun 20, 2025 by Tomoki Yonezawa Committed by Vlad Popa Jun 30, 2025

audio: Fix unexpected mute on full volume device



Issue:
Full volume devices should not be mutable as their define. However,
when AudioManager#setStreamVolume is called with index zero while
using a full volume device, audio is muted unexpectedly. This creates
inconsistency with AudioManager#adjustStreamVolume behavior, which
correctly prevents muting on full volume devices.

Root Cause:
AudioService incorrectly applies mute state in onSetStreamVolume
even for full volume devices.

Solution:
Prevent mute state changes when setStreamVolume is called for
full volume devices.

Bug: 426346130
Test: manual - adb shell cmd media_session volume --set 0
      while using full volume device.
Flag: EXEMPT bugfix

Change-Id: I9fd99fd92b96bad49551ff9bf780fdcd7f28a72b
Signed-off-by: Tomoki Yonezawa <Tomoki.Yonezawa@sony.com>

parent cd0b2fde

services/core/java/com/android/server/audio/AudioService.java

+4 −1

Original line number	Diff line number	Diff line
		@@ -5681,8 +5681,11 @@ public class AudioService extends IAudioService.Stub
		onSetStreamVolume(streamType, index, flags, deviceType, caller, hasModifyAudioSettings,
		// ada is non-null when called from setDeviceVolume,
		// which shouldn't update the mute state
		canChangeMuteAndUpdateController /canChangeMute/);
		// full volume device shouldn't update the mute state
		/* canChangeMute= */ canChangeMuteAndUpdateController
		&& !isFullVolumeDevice(deviceType));
		index = streamState.getIndex(deviceType);

		}

		handleAbsoluteVolume(streamType, streamTypeAlias, deviceAttr, index, streamState.mIsMuted,