1 /* 2 * Copyright (C) 2014 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.server.telecom; 18 19 import android.content.Context; 20 import android.media.AudioDeviceCallback; 21 import android.media.AudioDeviceInfo; 22 import android.media.AudioManager; 23 import android.telecom.Log; 24 25 import com.android.internal.annotations.VisibleForTesting; 26 import com.android.internal.util.IndentingPrintWriter; 27 28 import java.util.Collections; 29 import java.util.Set; 30 import java.util.concurrent.ConcurrentHashMap; 31 32 /** Listens for and caches headset state. */ 33 @VisibleForTesting 34 public class WiredHeadsetManager { 35 @VisibleForTesting 36 public interface Listener { onWiredHeadsetPluggedInChanged(boolean oldIsPluggedIn, boolean newIsPluggedIn)37 void onWiredHeadsetPluggedInChanged(boolean oldIsPluggedIn, boolean newIsPluggedIn); 38 } 39 40 /** Receiver for wired headset plugged and unplugged events. */ 41 private class WiredHeadsetCallback extends AudioDeviceCallback { 42 @Override onAudioDevicesAdded(AudioDeviceInfo[] addedDevices)43 public void onAudioDevicesAdded(AudioDeviceInfo[] addedDevices) { 44 Log.startSession("WHC.oADA"); 45 try { 46 updateHeadsetStatus(); 47 } finally { 48 Log.endSession(); 49 } 50 } 51 52 @Override onAudioDevicesRemoved(AudioDeviceInfo[] devices)53 public void onAudioDevicesRemoved(AudioDeviceInfo[] devices) { 54 Log.startSession("WHC.oADR"); 55 try { 56 updateHeadsetStatus(); 57 } finally { 58 Log.endSession(); 59 } 60 } 61 updateHeadsetStatus()62 private void updateHeadsetStatus() { 63 AudioDeviceInfo[] devices = mAudioManager.getDevices(AudioManager.GET_DEVICES_ALL); 64 boolean isPluggedIn = false; 65 for (AudioDeviceInfo device : devices) { 66 switch (device.getType()) { 67 case AudioDeviceInfo.TYPE_WIRED_HEADPHONES: 68 case AudioDeviceInfo.TYPE_WIRED_HEADSET: 69 case AudioDeviceInfo.TYPE_USB_DEVICE: 70 isPluggedIn = true; 71 } 72 } 73 74 Log.i(WiredHeadsetManager.this, "ACTION_HEADSET_PLUG event, plugged in: %b, ", 75 isPluggedIn); 76 onHeadsetPluggedInChanged(isPluggedIn); 77 } 78 } 79 80 private final AudioManager mAudioManager; 81 private boolean mIsPluggedIn; 82 /** 83 * ConcurrentHashMap constructor params: 8 is initial table size, 0.9f is 84 * load factor before resizing, 1 means we only expect a single thread to 85 * access the map so make only a single shard 86 */ 87 private final Set<Listener> mListeners = Collections.newSetFromMap( 88 new ConcurrentHashMap<>(8, 0.9f, 1)); 89 WiredHeadsetManager(Context context)90 public WiredHeadsetManager(Context context) { 91 mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 92 mIsPluggedIn = mAudioManager.isWiredHeadsetOn(); 93 94 mAudioManager.registerAudioDeviceCallback(new WiredHeadsetCallback(), null); 95 } 96 97 @VisibleForTesting addListener(Listener listener)98 public void addListener(Listener listener) { 99 mListeners.add(listener); 100 } 101 removeListener(Listener listener)102 void removeListener(Listener listener) { 103 if (listener != null) { 104 mListeners.remove(listener); 105 } 106 } 107 108 @VisibleForTesting isPluggedIn()109 public boolean isPluggedIn() { 110 return mIsPluggedIn; 111 } 112 onHeadsetPluggedInChanged(boolean isPluggedIn)113 private void onHeadsetPluggedInChanged(boolean isPluggedIn) { 114 if (mIsPluggedIn != isPluggedIn) { 115 Log.v(this, "onHeadsetPluggedInChanged, mIsPluggedIn: %b -> %b", mIsPluggedIn, 116 isPluggedIn); 117 boolean oldIsPluggedIn = mIsPluggedIn; 118 mIsPluggedIn = isPluggedIn; 119 for (Listener listener : mListeners) { 120 listener.onWiredHeadsetPluggedInChanged(oldIsPluggedIn, mIsPluggedIn); 121 } 122 } 123 } 124 125 /** 126 * Dumps the state of the {@link WiredHeadsetManager}. 127 * 128 * @param pw The {@code IndentingPrintWriter} to write the state to. 129 */ dump(IndentingPrintWriter pw)130 public void dump(IndentingPrintWriter pw) { 131 pw.println("mIsPluggedIn: " + mIsPluggedIn); 132 } 133 } 134