1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.media;
18 
19 import android.os.Handler;
20 
21 /**
22  * Helper class {@link AudioTrack}, {@link AudioRecord}, {@link MediaPlayer} and {@link MediaRecorder}
23  * to handle the forwarding of native events to the appropriate listener
24  * (potentially) handled in a different thread.
25  * @hide
26  */
27 class NativeRoutingEventHandlerDelegate {
28     private AudioRouting mAudioRouting;
29     private AudioRouting.OnRoutingChangedListener mOnRoutingChangedListener;
30     private Handler mHandler;
31 
NativeRoutingEventHandlerDelegate(final AudioRouting audioRouting, final AudioRouting.OnRoutingChangedListener listener, Handler handler)32     NativeRoutingEventHandlerDelegate(final AudioRouting audioRouting,
33             final AudioRouting.OnRoutingChangedListener listener, Handler handler) {
34         mAudioRouting = audioRouting;
35         mOnRoutingChangedListener = listener;
36         mHandler = handler;
37     }
38 
notifyClient()39     void notifyClient() {
40         if (mHandler != null) {
41             mHandler.post(new Runnable() {
42                 @Override
43                 public void run() {
44                     if (mOnRoutingChangedListener != null) {
45                         mOnRoutingChangedListener.onRoutingChanged(mAudioRouting);
46                     }
47                 }
48             });
49         }
50     }
51 }
52