Support setting preferred mixer attributes for USB devices.
This is part of USB audio improvement. With setting mixer attributes,
apps will be able to choose the best mixer attributes for their
playback. This can help improve latency and audio experience.
Bug: 239435816
Test: atest AudioManagerTest
Test: atest audiopolicy_tests
Test: Manually
Change-Id: Ifd1e8e35f94dab309eabe879d20ae0358038a4bf
diff --git a/services/audiopolicy/AudioPolicyInterface.h b/services/audiopolicy/AudioPolicyInterface.h
index b85382e..9c4ab80 100644
--- a/services/audiopolicy/AudioPolicyInterface.h
+++ b/services/audiopolicy/AudioPolicyInterface.h
@@ -407,6 +407,20 @@
// retrieves the list of available direct audio profiles for the given audio attributes
virtual status_t getDirectProfilesForAttributes(const audio_attributes_t* attr,
AudioProfileVector& audioProfiles) = 0;
+
+ virtual status_t getSupportedMixerAttributes(
+ audio_port_handle_t portId, std::vector<audio_mixer_attributes_t>& mixerAttrs) = 0;
+ virtual status_t setPreferredMixerAttributes(
+ const audio_attributes_t* attr,
+ audio_port_handle_t portId,
+ uid_t uid,
+ const audio_mixer_attributes_t* mixerAttributes) = 0;
+ virtual status_t getPreferredMixerAttributes(const audio_attributes_t* attr,
+ audio_port_handle_t portId,
+ audio_mixer_attributes_t* mixerAttributes) = 0;
+ virtual status_t clearPreferredMixerAttributes(const audio_attributes_t* attr,
+ audio_port_handle_t portId,
+ uid_t uid) = 0;
};
// Audio Policy client Interface