RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 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.media; |
| 18 | |
| 19 | import android.content.Context; |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 20 | import android.media.routeprovider.RouteRequest; |
| 21 | import android.media.session.ISession; |
| 22 | import android.media.session.ISessionCallback; |
| 23 | import android.media.session.ISessionManager; |
| 24 | import android.media.session.RouteInfo; |
| 25 | import android.media.session.RouteOptions; |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 26 | import android.os.Binder; |
RoboErik | 8ae0f34 | 2014-02-24 18:02:08 -0800 | [diff] [blame] | 27 | import android.os.Handler; |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 28 | import android.os.RemoteException; |
| 29 | import android.text.TextUtils; |
| 30 | import android.util.Log; |
| 31 | |
| 32 | import com.android.server.SystemService; |
| 33 | |
| 34 | import java.util.ArrayList; |
| 35 | |
| 36 | /** |
| 37 | * System implementation of MediaSessionManager |
| 38 | */ |
| 39 | public class MediaSessionService extends SystemService { |
| 40 | private static final String TAG = "MediaSessionService"; |
| 41 | private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); |
| 42 | |
| 43 | private final SessionManagerImpl mSessionManagerImpl; |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 44 | private final MediaRouteProviderWatcher mRouteProviderWatcher; |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 45 | |
| 46 | private final ArrayList<MediaSessionRecord> mSessions |
| 47 | = new ArrayList<MediaSessionRecord>(); |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 48 | private final ArrayList<MediaRouteProviderProxy> mProviders |
| 49 | = new ArrayList<MediaRouteProviderProxy>(); |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 50 | private final Object mLock = new Object(); |
RoboErik | 8ae0f34 | 2014-02-24 18:02:08 -0800 | [diff] [blame] | 51 | // TODO do we want a separate thread for handling mediasession messages? |
| 52 | private final Handler mHandler = new Handler(); |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 53 | |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 54 | // Used to keep track of the current request to show routes for a specific |
| 55 | // session so we drop late callbacks properly. |
| 56 | private int mShowRoutesRequestId = 0; |
| 57 | |
| 58 | // TODO refactor to have per user state. See MediaRouterService for an |
| 59 | // example |
| 60 | |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 61 | public MediaSessionService(Context context) { |
| 62 | super(context); |
| 63 | mSessionManagerImpl = new SessionManagerImpl(); |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 64 | mRouteProviderWatcher = new MediaRouteProviderWatcher(context, mProviderWatcherCallback, |
| 65 | mHandler, context.getUserId()); |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | @Override |
| 69 | public void onStart() { |
| 70 | publishBinderService(Context.MEDIA_SESSION_SERVICE, mSessionManagerImpl); |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 71 | mRouteProviderWatcher.start(); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Should trigger showing the Media route picker dialog. Right now it just |
| 76 | * kicks off a query to all the providers to get routes. |
| 77 | * |
| 78 | * @param record The session to show the picker for. |
| 79 | */ |
| 80 | public void showRoutePickerForSession(MediaSessionRecord record) { |
| 81 | // TODO for now just toggle the route to test (we will only have one |
| 82 | // match for now) |
| 83 | if (record.getRoute() != null) { |
| 84 | // For now send null to mean the local route |
| 85 | record.selectRoute(null); |
| 86 | return; |
| 87 | } |
| 88 | mShowRoutesRequestId++; |
| 89 | ArrayList<MediaRouteProviderProxy> providers = mRouteProviderWatcher.getProviders(); |
| 90 | for (int i = providers.size() - 1; i >= 0; i--) { |
| 91 | MediaRouteProviderProxy provider = providers.get(i); |
| 92 | provider.getRoutes(record, mShowRoutesRequestId); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Connect a session to the given route. |
| 98 | * |
| 99 | * @param session The session to connect. |
| 100 | * @param route The route to connect to. |
| 101 | * @param options The options to use for the connection. |
| 102 | */ |
| 103 | public void connectToRoute(MediaSessionRecord session, RouteInfo route, |
| 104 | RouteOptions options) { |
| 105 | synchronized (mLock) { |
| 106 | MediaRouteProviderProxy proxy = getProviderLocked(route.getProvider()); |
| 107 | if (proxy == null) { |
| 108 | Log.w(TAG, "Provider for route " + route.getName() + " does not exist."); |
| 109 | return; |
| 110 | } |
| 111 | RouteRequest request = new RouteRequest(session.getSessionInfo(), options, true); |
| 112 | // TODO make connect an async call to a ThreadPoolExecutor |
| 113 | proxy.connectToRoute(session, route, request); |
| 114 | } |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | void sessionDied(MediaSessionRecord session) { |
| 118 | synchronized (mSessions) { |
| 119 | destroySessionLocked(session); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | void destroySession(MediaSessionRecord session) { |
| 124 | synchronized (mSessions) { |
| 125 | destroySessionLocked(session); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | private void destroySessionLocked(MediaSessionRecord session) { |
| 130 | mSessions.remove(session); |
| 131 | } |
| 132 | |
| 133 | private void enforcePackageName(String packageName, int uid) { |
| 134 | if (TextUtils.isEmpty(packageName)) { |
| 135 | throw new IllegalArgumentException("packageName may not be empty"); |
| 136 | } |
| 137 | String[] packages = getContext().getPackageManager().getPackagesForUid(uid); |
| 138 | final int packageCount = packages.length; |
| 139 | for (int i = 0; i < packageCount; i++) { |
| 140 | if (packageName.equals(packages[i])) { |
| 141 | return; |
| 142 | } |
| 143 | } |
| 144 | throw new IllegalArgumentException("packageName is not owned by the calling process"); |
| 145 | } |
| 146 | |
| 147 | private MediaSessionRecord createSessionInternal(int pid, String packageName, |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 148 | ISessionCallback cb, String tag) { |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 149 | synchronized (mLock) { |
| 150 | return createSessionLocked(pid, packageName, cb, tag); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | private MediaSessionRecord createSessionLocked(int pid, String packageName, |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 155 | ISessionCallback cb, String tag) { |
RoboErik | 8ae0f34 | 2014-02-24 18:02:08 -0800 | [diff] [blame] | 156 | final MediaSessionRecord session = new MediaSessionRecord(pid, packageName, cb, tag, this, |
| 157 | mHandler); |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 158 | try { |
| 159 | cb.asBinder().linkToDeath(session, 0); |
| 160 | } catch (RemoteException e) { |
| 161 | throw new RuntimeException("Media Session owner died prematurely.", e); |
| 162 | } |
| 163 | synchronized (mSessions) { |
| 164 | mSessions.add(session); |
| 165 | } |
| 166 | if (DEBUG) { |
| 167 | Log.d(TAG, "Created session for package " + packageName + " with tag " + tag); |
| 168 | } |
| 169 | return session; |
| 170 | } |
| 171 | |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 172 | private MediaRouteProviderProxy getProviderLocked(String providerId) { |
| 173 | for (int i = mProviders.size() - 1; i >= 0; i--) { |
| 174 | MediaRouteProviderProxy provider = mProviders.get(i); |
| 175 | if (TextUtils.equals(providerId, provider.getId())) { |
| 176 | return provider; |
| 177 | } |
| 178 | } |
| 179 | return null; |
| 180 | } |
| 181 | |
| 182 | private int findIndexOfSessionForIdLocked(String sessionId) { |
| 183 | for (int i = mSessions.size() - 1; i >= 0; i--) { |
| 184 | MediaSessionRecord session = mSessions.get(i); |
| 185 | if (TextUtils.equals(session.getSessionInfo().getId(), sessionId)) { |
| 186 | return i; |
| 187 | } |
| 188 | } |
| 189 | return -1; |
| 190 | } |
| 191 | |
| 192 | private MediaRouteProviderWatcher.Callback mProviderWatcherCallback |
| 193 | = new MediaRouteProviderWatcher.Callback() { |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 194 | @Override |
RoboErik | 07c7077 | 2014-03-20 13:33:52 -0700 | [diff] [blame^] | 195 | public void removeProvider(MediaRouteProviderProxy provider) { |
| 196 | synchronized (mLock) { |
| 197 | mProviders.remove(provider); |
| 198 | provider.setRoutesListener(null); |
| 199 | provider.setInterested(false); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | @Override |
| 204 | public void addProvider(MediaRouteProviderProxy provider) { |
| 205 | synchronized (mLock) { |
| 206 | mProviders.add(provider); |
| 207 | provider.setRoutesListener(mRoutesCallback); |
| 208 | provider.setInterested(true); |
| 209 | } |
| 210 | } |
| 211 | }; |
| 212 | |
| 213 | private MediaRouteProviderProxy.RoutesListener mRoutesCallback |
| 214 | = new MediaRouteProviderProxy.RoutesListener() { |
| 215 | @Override |
| 216 | public void onRoutesUpdated(String sessionId, ArrayList<RouteInfo> routes, |
| 217 | int reqId) { |
| 218 | // TODO for now select the first route to test, eventually add the |
| 219 | // new routes to the dialog if it is still open |
| 220 | synchronized (mLock) { |
| 221 | int index = findIndexOfSessionForIdLocked(sessionId); |
| 222 | if (index != -1 && routes != null && routes.size() > 0) { |
| 223 | MediaSessionRecord record = mSessions.get(index); |
| 224 | record.selectRoute(routes.get(0)); |
| 225 | } |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | @Override |
| 230 | public void onRouteConnected(String sessionId, RouteInfo route, |
| 231 | RouteRequest options, RouteConnectionRecord connection) { |
| 232 | synchronized (mLock) { |
| 233 | int index = findIndexOfSessionForIdLocked(sessionId); |
| 234 | if (index != -1) { |
| 235 | MediaSessionRecord session = mSessions.get(index); |
| 236 | session.setRouteConnected(route, options.getConnectionOptions(), connection); |
| 237 | } |
| 238 | } |
| 239 | } |
| 240 | }; |
| 241 | |
| 242 | class SessionManagerImpl extends ISessionManager.Stub { |
| 243 | // TODO add createSessionAsUser, pass user-id to |
| 244 | // ActivityManagerNative.handleIncomingUser and stash result for use |
| 245 | // when starting services on that session's behalf. |
| 246 | @Override |
| 247 | public ISession createSession(String packageName, ISessionCallback cb, String tag) |
RoboErik | 01fe661 | 2014-02-13 14:19:04 -0800 | [diff] [blame] | 248 | throws RemoteException { |
| 249 | final int pid = Binder.getCallingPid(); |
| 250 | final int uid = Binder.getCallingUid(); |
| 251 | final long token = Binder.clearCallingIdentity(); |
| 252 | try { |
| 253 | enforcePackageName(packageName, uid); |
| 254 | if (cb == null) { |
| 255 | throw new IllegalArgumentException("Controller callback cannot be null"); |
| 256 | } |
| 257 | return createSessionInternal(pid, packageName, cb, tag).getSessionBinder(); |
| 258 | } finally { |
| 259 | Binder.restoreCallingIdentity(token); |
| 260 | } |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | } |