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
17package com.android.incallui;
18
19import android.telecom.CallAudioState;
20
21import com.google.common.collect.Lists;
22
23import java.util.List;
24
25/**
26 * Proxy class for getting and setting the audio mode.
27 */
28public class AudioModeProvider {
29
30    static final int AUDIO_MODE_INVALID = 0;
31
32    private static AudioModeProvider sAudioModeProvider = new AudioModeProvider();
33    private int mAudioMode = CallAudioState.ROUTE_EARPIECE;
34    private boolean mMuted = false;
35    private int mSupportedModes = CallAudioState.ROUTE_EARPIECE
36            | CallAudioState.ROUTE_BLUETOOTH | CallAudioState.ROUTE_WIRED_HEADSET
37            | CallAudioState.ROUTE_SPEAKER;
38    private final List<AudioModeListener> mListeners = Lists.newArrayList();
39
40    public static AudioModeProvider getInstance() {
41        return sAudioModeProvider;
42    }
43
44    public void onAudioStateChanged(boolean isMuted, int route, int supportedRouteMask) {
45        onAudioModeChange(route, isMuted);
46        onSupportedAudioModeChange(supportedRouteMask);
47    }
48
49    public void onAudioModeChange(int newMode, boolean muted) {
50        if (mAudioMode != newMode) {
51            mAudioMode = newMode;
52            for (AudioModeListener l : mListeners) {
53                l.onAudioMode(mAudioMode);
54            }
55        }
56
57        if (mMuted != muted) {
58            mMuted = muted;
59            for (AudioModeListener l : mListeners) {
60                l.onMute(mMuted);
61            }
62        }
63    }
64
65    public void onSupportedAudioModeChange(int newModeMask) {
66        mSupportedModes = newModeMask;
67
68        for (AudioModeListener l : mListeners) {
69            l.onSupportedAudioMode(mSupportedModes);
70        }
71    }
72
73    public void addListener(AudioModeListener listener) {
74        if (!mListeners.contains(listener)) {
75            mListeners.add(listener);
76            listener.onSupportedAudioMode(mSupportedModes);
77            listener.onAudioMode(mAudioMode);
78            listener.onMute(mMuted);
79        }
80    }
81
82    public void removeListener(AudioModeListener listener) {
83        if (mListeners.contains(listener)) {
84            mListeners.remove(listener);
85        }
86    }
87
88    public int getSupportedModes() {
89        return mSupportedModes;
90    }
91
92    public int getAudioMode() {
93        return mAudioMode;
94    }
95
96    public boolean getMute() {
97        return mMuted;
98    }
99
100    /* package */ interface AudioModeListener {
101        void onAudioMode(int newMode);
102        void onMute(boolean muted);
103        void onSupportedAudioMode(int modeMask);
104    }
105}
106