AudioSystem: add API to query audio HW sync source
Add a method to query from the audio HAL the HW sync
source used for a given audio session.
Modify audio policy to select a direct output with HW sync
when requested.
Bug: 16132368.
Change-Id: I03038f9188f2d389f8a5fd76a671854013a4513e
diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index f22792f..dd63a23 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -149,6 +149,11 @@
static void acquireAudioSessionId(int audioSession, pid_t pid);
static void releaseAudioSessionId(int audioSession, pid_t pid);
+ // Get the HW synchronization source used for an audio session.
+ // Return a valid source or AUDIO_HW_SYNC_INVALID if an error occurs
+ // or no HW sync source is used.
+ static audio_hw_sync_t getAudioHwSyncForSession(audio_session_t sessionId);
+
// types of io configuration change events received with ioConfigChanged()
enum io_config_event {
OUTPUT_OPENED,