1 /* 2 * Copyright (C) 2019 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.settings.media; 18 19 import static android.media.AudioManager.STREAM_DEVICES_CHANGED_ACTION; 20 21 import android.content.BroadcastReceiver; 22 import android.content.Context; 23 import android.content.Intent; 24 import android.content.IntentFilter; 25 import android.media.AudioManager; 26 import android.media.session.MediaController; 27 import android.media.session.MediaSessionManager; 28 import android.media.session.PlaybackState; 29 import android.net.Uri; 30 import android.text.TextUtils; 31 import android.util.Log; 32 33 import androidx.annotation.Nullable; 34 35 import com.android.settings.bluetooth.Utils; 36 import com.android.settings.slices.SliceBackgroundWorker; 37 import com.android.settingslib.bluetooth.BluetoothCallback; 38 import com.android.settingslib.bluetooth.LocalBluetoothManager; 39 import com.android.settingslib.media.LocalMediaManager; 40 import com.android.settingslib.media.MediaDevice; 41 import com.android.settingslib.utils.ThreadUtils; 42 43 import com.google.common.annotations.VisibleForTesting; 44 45 import java.util.Collection; 46 import java.util.List; 47 import java.util.concurrent.CopyOnWriteArrayList; 48 49 /** 50 * Listener for background change from {@code BluetoothCallback} to update media output indicator. 51 */ 52 public class MediaOutputIndicatorWorker extends SliceBackgroundWorker implements BluetoothCallback, 53 LocalMediaManager.DeviceCallback { 54 55 private static final String TAG = "MediaOutputIndWorker"; 56 57 private final DevicesChangedBroadcastReceiver mReceiver; 58 private final Context mContext; 59 private final Collection<MediaDevice> mMediaDevices = new CopyOnWriteArrayList<>(); 60 61 private LocalBluetoothManager mLocalBluetoothManager; 62 private String mPackageName; 63 64 @VisibleForTesting 65 LocalMediaManager mLocalMediaManager; 66 MediaOutputIndicatorWorker(Context context, Uri uri)67 public MediaOutputIndicatorWorker(Context context, Uri uri) { 68 super(context, uri); 69 mReceiver = new DevicesChangedBroadcastReceiver(); 70 mContext = context; 71 } 72 73 @Override onSlicePinned()74 protected void onSlicePinned() { 75 mMediaDevices.clear(); 76 mLocalBluetoothManager = Utils.getLocalBtManager(getContext()); 77 if (mLocalBluetoothManager == null) { 78 Log.e(TAG, "Bluetooth is not supported on this device"); 79 return; 80 } 81 final IntentFilter intentFilter = new IntentFilter(STREAM_DEVICES_CHANGED_ACTION); 82 mContext.registerReceiver(mReceiver, intentFilter); 83 mLocalBluetoothManager.getEventManager().registerCallback(this); 84 85 ThreadUtils.postOnBackgroundThread(() -> { 86 final MediaController controller = getActiveLocalMediaController(); 87 if (controller == null) { 88 mPackageName = null; 89 } else { 90 mPackageName = controller.getPackageName(); 91 } 92 if (mLocalMediaManager == null || !TextUtils.equals(mPackageName, 93 mLocalMediaManager.getPackageName())) { 94 mLocalMediaManager = new LocalMediaManager(mContext, mPackageName, 95 null /* notification */); 96 } 97 mLocalMediaManager.registerCallback(this); 98 mLocalMediaManager.startScan(); 99 }); 100 } 101 102 @Override onSliceUnpinned()103 protected void onSliceUnpinned() { 104 if (mLocalMediaManager != null) { 105 mLocalMediaManager.unregisterCallback(this); 106 mLocalMediaManager.stopScan(); 107 } 108 109 if (mLocalBluetoothManager == null) { 110 Log.e(TAG, "Bluetooth is not supported on this device"); 111 return; 112 } 113 mLocalBluetoothManager.getEventManager().unregisterCallback(this); 114 mContext.unregisterReceiver(mReceiver); 115 } 116 117 @Override close()118 public void close() { 119 mLocalBluetoothManager = null; 120 mLocalMediaManager = null; 121 } 122 123 @Override onAudioModeChanged()124 public void onAudioModeChanged() { 125 notifySliceChange(); 126 } 127 128 @Nullable getActiveLocalMediaController()129 MediaController getActiveLocalMediaController() { 130 final MediaSessionManager mMediaSessionManager = mContext.getSystemService( 131 MediaSessionManager.class); 132 133 for (MediaController controller : mMediaSessionManager.getActiveSessions(null)) { 134 final MediaController.PlaybackInfo pi = controller.getPlaybackInfo(); 135 if (pi == null) { 136 return null; 137 } 138 final PlaybackState playbackState = controller.getPlaybackState(); 139 if (playbackState == null) { 140 return null; 141 } 142 if (pi.getPlaybackType() == MediaController.PlaybackInfo.PLAYBACK_TYPE_LOCAL 143 && playbackState.getState() == PlaybackState.STATE_PLAYING) { 144 return controller; 145 } 146 } 147 return null; 148 } 149 150 @Override onDeviceListUpdate(List<MediaDevice> devices)151 public void onDeviceListUpdate(List<MediaDevice> devices) { 152 buildMediaDevices(devices); 153 notifySliceChange(); 154 } 155 buildMediaDevices(List<MediaDevice> devices)156 private void buildMediaDevices(List<MediaDevice> devices) { 157 mMediaDevices.clear(); 158 mMediaDevices.addAll(devices); 159 } 160 161 @Override onSelectedDeviceStateChanged(MediaDevice device, int state)162 public void onSelectedDeviceStateChanged(MediaDevice device, int state) { 163 notifySliceChange(); 164 } 165 166 @Override onDeviceAttributesChanged()167 public void onDeviceAttributesChanged() { 168 notifySliceChange(); 169 } 170 getMediaDevices()171 Collection<MediaDevice> getMediaDevices() { 172 return mMediaDevices; 173 } 174 getCurrentConnectedMediaDevice()175 MediaDevice getCurrentConnectedMediaDevice() { 176 return mLocalMediaManager.getCurrentConnectedDevice(); 177 } 178 getPackageName()179 String getPackageName() { 180 return mPackageName; 181 } 182 183 private class DevicesChangedBroadcastReceiver extends BroadcastReceiver { 184 @Override onReceive(Context context, Intent intent)185 public void onReceive(Context context, Intent intent) { 186 final String action = intent.getAction(); 187 if (TextUtils.equals(AudioManager.STREAM_DEVICES_CHANGED_ACTION, action)) { 188 notifySliceChange(); 189 } 190 } 191 } 192 } 193