1 /*
2  * Copyright (C) 2013 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 com.android.incallui.audiomode;
18 
19 import android.telecom.CallAudioState;
20 import java.util.ArrayList;
21 import java.util.List;
22 
23 /** Proxy class for getting and setting the audio mode. */
24 public class AudioModeProvider {
25   private static final int SUPPORTED_AUDIO_ROUTE_ALL =
26       CallAudioState.ROUTE_EARPIECE
27           | CallAudioState.ROUTE_BLUETOOTH
28           | CallAudioState.ROUTE_WIRED_HEADSET
29           | CallAudioState.ROUTE_SPEAKER;
30 
31   private static final AudioModeProvider instance = new AudioModeProvider();
32   private final List<AudioModeListener> listeners = new ArrayList<>();
33   private CallAudioState audioState =
34       new CallAudioState(false, CallAudioState.ROUTE_EARPIECE, SUPPORTED_AUDIO_ROUTE_ALL);
35 
getInstance()36   public static AudioModeProvider getInstance() {
37     return instance;
38   }
39 
onAudioStateChanged(CallAudioState audioState)40   public void onAudioStateChanged(CallAudioState audioState) {
41     if (!this.audioState.equals(audioState)) {
42       this.audioState = audioState;
43       for (AudioModeListener listener : listeners) {
44         listener.onAudioStateChanged(audioState);
45       }
46     }
47   }
48 
addListener(AudioModeListener listener)49   public void addListener(AudioModeListener listener) {
50     if (!listeners.contains(listener)) {
51       listeners.add(listener);
52       listener.onAudioStateChanged(audioState);
53     }
54   }
55 
removeListener(AudioModeListener listener)56   public void removeListener(AudioModeListener listener) {
57     listeners.remove(listener);
58   }
59 
getAudioState()60   public CallAudioState getAudioState() {
61     return audioState;
62   }
63 
64   /** Notified on changes to audio mode. */
65   public interface AudioModeListener {
66 
onAudioStateChanged(CallAudioState audioState)67     void onAudioStateChanged(CallAudioState audioState);
68   }
69 }
70