Bluetooth: request audio focus on incoming call

When the a2dp stream is suspended for an incoming call, request audio focus from the audio manager so that any playing media will pause/duck as needed. Change-Id: I308b697ad998b7167703ebc89c6285034ac1ebf9 Signed-off-by: Roman Birg <[email protected]>
F-AOSP · Jun 24, 2015 · 3ee0044 · 3ee0044
1 parent c08f80b
commit 3ee0044
Showing 1 changed file with 21 additions and 0 deletions.
diff --git a/src/com/android/bluetooth/hfp/HeadsetStateMachine.java b/src/com/android/bluetooth/hfp/HeadsetStateMachine.java
@@ -202,6 +202,7 @@ final class HeadsetStateMachine extends StateMachine {
     private IBluetoothHeadsetPhone mPhoneProxy;
     private boolean mNativeAvailable;
 
+    private boolean mAudioFocused;
     private boolean mA2dpSuspend;
     private int mA2dpPlayState;
     private int mA2dpState;
@@ -1736,6 +1737,7 @@ private void processAudioEvent(int state, BluetoothDevice device) {
                                 log("Audio is closed,Set A2dpSuspended=false");
                                 mAudioManager.setParameters("A2dpSuspended=false");
                                 mA2dpSuspend = false;
+                                releaseAudioFocus();
                             }
                         }
                         broadcastAudioState(device, BluetoothHeadset.STATE_AUDIO_DISCONNECTED,
@@ -2249,6 +2251,7 @@ private void processAudioEvent(int state, BluetoothDevice device) {
                                 log("Audio is closed,Set A2dpSuspended=false");
                                 mAudioManager.setParameters("A2dpSuspended=false");
                                 mA2dpSuspend = false;
+                                releaseAudioFocus();
                             }
                         }
                         broadcastAudioState(device, BluetoothHeadset.STATE_AUDIO_DISCONNECTED,
@@ -2816,6 +2819,7 @@ synchronized boolean initiateScoUsingVirtualVoiceCall() {
             if (mA2dpPlayState == BluetoothA2dp.STATE_PLAYING) {
                 log("suspending A2DP stream for SCO");
                 mPendingCiev = true;
+                requestAudioFocus();
                 return true;
             }
         }
@@ -2920,6 +2924,21 @@ else if (prevState == BluetoothA2dp.STATE_NOT_PLAYING) {
         }
     }
 
+    private void requestAudioFocus() {
+        if (!mAudioFocused) {
+            mAudioManager.requestAudioFocusForCall(AudioManager.STREAM_BLUETOOTH_SCO,
+                    AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
+            mAudioFocused = true;
+        }
+    }
+
+    private void releaseAudioFocus() {
+        if (mAudioFocused) {
+            mAudioManager.abandonAudioFocusForCall();
+            mAudioFocused = false;
+        }
+    }
+
     private void processAnswerCall(BluetoothDevice device) {
          if(device == null) {
             Log.w(TAG, "processAnswerCall device is null");
@@ -3123,6 +3142,7 @@ private void processA2dpState(HeadsetCallState callState) {
             if (mA2dpPlayState == BluetoothA2dp.STATE_PLAYING) {
                 Log.d(TAG, "suspending A2DP stream for Call");
                 mPendingCiev = true;
+                requestAudioFocus();
                 return ;
             }
         }
@@ -3136,6 +3156,7 @@ private void processA2dpState(HeadsetCallState callState) {
                 log("Set A2dpSuspended=false to reset the a2dp state to standby");
                 mAudioManager.setParameters("A2dpSuspended=false");
                 mA2dpSuspend = false;
+                releaseAudioFocus();
             }
         }
     }