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 17package android.media; 18 19import android.os.Handler; 20import android.os.Looper; 21import android.os.Message; 22import android.util.Log; 23 24import java.util.ArrayList; 25import java.lang.ref.WeakReference; 26 27/** 28 * The AudioPortEventHandler handles AudioManager.OnAudioPortUpdateListener callbacks 29 * posted from JNI 30 * @hide 31 */ 32 33class AudioPortEventHandler { 34 private final Handler mHandler; 35 private ArrayList<AudioManager.OnAudioPortUpdateListener> mListeners; 36 private AudioManager mAudioManager; 37 38 private static String TAG = "AudioPortEventHandler"; 39 40 private static final int AUDIOPORT_EVENT_PORT_LIST_UPDATED = 1; 41 private static final int AUDIOPORT_EVENT_PATCH_LIST_UPDATED = 2; 42 private static final int AUDIOPORT_EVENT_SERVICE_DIED = 3; 43 private static final int AUDIOPORT_EVENT_NEW_LISTENER = 4; 44 45 AudioPortEventHandler(AudioManager audioManager) { 46 mAudioManager = audioManager; 47 mListeners = new ArrayList<AudioManager.OnAudioPortUpdateListener>(); 48 49 // find the looper for our new event handler 50 Looper looper = Looper.getMainLooper(); 51 52 if (looper != null) { 53 mHandler = new Handler(looper) { 54 @Override 55 public void handleMessage(Message msg) { 56 ArrayList<AudioManager.OnAudioPortUpdateListener> listeners; 57 synchronized (this) { 58 if (msg.what == AUDIOPORT_EVENT_NEW_LISTENER) { 59 listeners = new ArrayList<AudioManager.OnAudioPortUpdateListener>(); 60 if (mListeners.contains(msg.obj)) { 61 listeners.add((AudioManager.OnAudioPortUpdateListener)msg.obj); 62 } 63 } else { 64 listeners = mListeners; 65 } 66 } 67 if (listeners.isEmpty()) { 68 return; 69 } 70 // reset audio port cache if the event corresponds to a change coming 71 // from audio policy service or if mediaserver process died. 72 if (msg.what == AUDIOPORT_EVENT_PORT_LIST_UPDATED || 73 msg.what == AUDIOPORT_EVENT_PATCH_LIST_UPDATED || 74 msg.what == AUDIOPORT_EVENT_SERVICE_DIED) { 75 mAudioManager.resetAudioPortGeneration(); 76 } 77 ArrayList<AudioPort> ports = new ArrayList<AudioPort>(); 78 ArrayList<AudioPatch> patches = new ArrayList<AudioPatch>(); 79 if (msg.what != AUDIOPORT_EVENT_SERVICE_DIED) { 80 int status = mAudioManager.updateAudioPortCache(ports, patches); 81 if (status != AudioManager.SUCCESS) { 82 return; 83 } 84 } 85 86 switch (msg.what) { 87 case AUDIOPORT_EVENT_NEW_LISTENER: 88 case AUDIOPORT_EVENT_PORT_LIST_UPDATED: 89 AudioPort[] portList = ports.toArray(new AudioPort[0]); 90 for (int i = 0; i < listeners.size(); i++) { 91 listeners.get(i).onAudioPortListUpdate(portList); 92 } 93 if (msg.what == AUDIOPORT_EVENT_PORT_LIST_UPDATED) { 94 break; 95 } 96 // FALL THROUGH 97 98 case AUDIOPORT_EVENT_PATCH_LIST_UPDATED: 99 AudioPatch[] patchList = patches.toArray(new AudioPatch[0]); 100 for (int i = 0; i < listeners.size(); i++) { 101 listeners.get(i).onAudioPatchListUpdate(patchList); 102 } 103 break; 104 105 case AUDIOPORT_EVENT_SERVICE_DIED: 106 for (int i = 0; i < listeners.size(); i++) { 107 listeners.get(i).onServiceDied(); 108 } 109 break; 110 111 default: 112 break; 113 } 114 } 115 }; 116 } else { 117 mHandler = null; 118 } 119 120 native_setup(new WeakReference<AudioPortEventHandler>(this)); 121 } 122 private native void native_setup(Object module_this); 123 124 @Override 125 protected void finalize() { 126 native_finalize(); 127 } 128 private native void native_finalize(); 129 130 void registerListener(AudioManager.OnAudioPortUpdateListener l) { 131 synchronized (this) { 132 mListeners.add(l); 133 } 134 if (mHandler != null) { 135 Message m = mHandler.obtainMessage(AUDIOPORT_EVENT_NEW_LISTENER, 0, 0, l); 136 mHandler.sendMessage(m); 137 } 138 } 139 140 void unregisterListener(AudioManager.OnAudioPortUpdateListener l) { 141 synchronized (this) { 142 mListeners.remove(l); 143 } 144 } 145 146 Handler handler() { 147 return mHandler; 148 } 149 150 @SuppressWarnings("unused") 151 private static void postEventFromNative(Object module_ref, 152 int what, int arg1, int arg2, Object obj) { 153 AudioPortEventHandler eventHandler = 154 (AudioPortEventHandler)((WeakReference)module_ref).get(); 155 if (eventHandler == null) { 156 return; 157 } 158 159 if (eventHandler != null) { 160 Handler handler = eventHandler.handler(); 161 if (handler != null) { 162 Message m = handler.obtainMessage(what, arg1, arg2, obj); 163 handler.sendMessage(m); 164 } 165 } 166 } 167 168} 169