| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.media; |
| |
| import android.Manifest; |
| import android.app.Activity; |
| import android.app.ActivityManager; |
| import android.app.KeyguardManager; |
| import android.app.PendingIntent; |
| import android.app.PendingIntent.CanceledException; |
| import android.content.ActivityNotFoundException; |
| import android.content.BroadcastReceiver; |
| import android.content.ComponentName; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.PackageManager; |
| import android.database.ContentObserver; |
| import android.media.AudioManager; |
| import android.media.AudioManagerInternal; |
| import android.media.AudioSystem; |
| import android.media.IAudioService; |
| import android.media.IRemoteVolumeController; |
| import android.media.session.IActiveSessionsListener; |
| import android.media.session.ISession; |
| import android.media.session.ISessionCallback; |
| import android.media.session.ISessionManager; |
| import android.media.session.MediaSession; |
| import android.net.Uri; |
| import android.os.Binder; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Message; |
| import android.os.PowerManager; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.os.ResultReceiver; |
| import android.os.ServiceManager; |
| import android.os.UserHandle; |
| import android.provider.Settings; |
| import android.speech.RecognizerIntent; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| import android.view.KeyEvent; |
| |
| import com.android.server.LocalServices; |
| import com.android.server.SystemService; |
| import com.android.server.Watchdog; |
| import com.android.server.Watchdog.Monitor; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * System implementation of MediaSessionManager |
| */ |
| public class MediaSessionService extends SystemService implements Monitor { |
| private static final String TAG = "MediaSessionService"; |
| private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); |
| |
| private static final int WAKELOCK_TIMEOUT = 5000; |
| |
| /* package */final IBinder mICallback = new Binder(); |
| |
| private final SessionManagerImpl mSessionManagerImpl; |
| private final MediaSessionStack mPriorityStack; |
| |
| private final ArrayList<MediaSessionRecord> mAllSessions = new ArrayList<MediaSessionRecord>(); |
| private final SparseArray<UserRecord> mUserRecords = new SparseArray<UserRecord>(); |
| private final ArrayList<SessionsListenerRecord> mSessionsListeners |
| = new ArrayList<SessionsListenerRecord>(); |
| private final Object mLock = new Object(); |
| private final MessageHandler mHandler = new MessageHandler(); |
| private final PowerManager.WakeLock mMediaEventWakeLock; |
| |
| private KeyguardManager mKeyguardManager; |
| private IAudioService mAudioService; |
| private AudioManagerInternal mAudioManagerInternal; |
| private ContentResolver mContentResolver; |
| private SettingsObserver mSettingsObserver; |
| |
| private int mCurrentUserId = -1; |
| |
| // Used to notify system UI when remote volume was changed. TODO find a |
| // better way to handle this. |
| private IRemoteVolumeController mRvc; |
| |
| public MediaSessionService(Context context) { |
| super(context); |
| mSessionManagerImpl = new SessionManagerImpl(); |
| mPriorityStack = new MediaSessionStack(); |
| PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); |
| mMediaEventWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "handleMediaEvent"); |
| } |
| |
| @Override |
| public void onStart() { |
| publishBinderService(Context.MEDIA_SESSION_SERVICE, mSessionManagerImpl); |
| Watchdog.getInstance().addMonitor(this); |
| mKeyguardManager = |
| (KeyguardManager) getContext().getSystemService(Context.KEYGUARD_SERVICE); |
| mAudioService = getAudioService(); |
| mAudioManagerInternal = LocalServices.getService(AudioManagerInternal.class); |
| mContentResolver = getContext().getContentResolver(); |
| mSettingsObserver = new SettingsObserver(); |
| mSettingsObserver.observe(); |
| |
| updateUser(); |
| } |
| |
| private IAudioService getAudioService() { |
| IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); |
| return IAudioService.Stub.asInterface(b); |
| } |
| |
| public void updateSession(MediaSessionRecord record) { |
| synchronized (mLock) { |
| if (!mAllSessions.contains(record)) { |
| Log.d(TAG, "Unknown session updated. Ignoring."); |
| return; |
| } |
| mPriorityStack.onSessionStateChange(record); |
| } |
| mHandler.post(MessageHandler.MSG_SESSIONS_CHANGED, record.getUserId(), 0); |
| } |
| |
| /** |
| * Tells the system UI that volume has changed on a remote session. |
| */ |
| public void notifyRemoteVolumeChanged(int flags, MediaSessionRecord session) { |
| if (mRvc == null) { |
| return; |
| } |
| try { |
| mRvc.remoteVolumeChanged(session.getControllerBinder(), flags); |
| } catch (Exception e) { |
| Log.wtf(TAG, "Error sending volume change to system UI.", e); |
| } |
| } |
| |
| public void onSessionPlaystateChange(MediaSessionRecord record, int oldState, int newState) { |
| boolean updateSessions = false; |
| synchronized (mLock) { |
| if (!mAllSessions.contains(record)) { |
| Log.d(TAG, "Unknown session changed playback state. Ignoring."); |
| return; |
| } |
| updateSessions = mPriorityStack.onPlaystateChange(record, oldState, newState); |
| } |
| if (updateSessions) { |
| mHandler.post(MessageHandler.MSG_SESSIONS_CHANGED, record.getUserId(), 0); |
| } |
| } |
| |
| public void onSessionPlaybackTypeChanged(MediaSessionRecord record) { |
| synchronized (mLock) { |
| if (!mAllSessions.contains(record)) { |
| Log.d(TAG, "Unknown session changed playback type. Ignoring."); |
| return; |
| } |
| pushRemoteVolumeUpdateLocked(record.getUserId()); |
| } |
| } |
| |
| @Override |
| public void onStartUser(int userHandle) { |
| updateUser(); |
| } |
| |
| @Override |
| public void onSwitchUser(int userHandle) { |
| updateUser(); |
| } |
| |
| @Override |
| public void onStopUser(int userHandle) { |
| synchronized (mLock) { |
| UserRecord user = mUserRecords.get(userHandle); |
| if (user != null) { |
| destroyUserLocked(user); |
| } |
| } |
| } |
| |
| @Override |
| public void monitor() { |
| synchronized (mLock) { |
| // Check for deadlock |
| } |
| } |
| |
| protected void enforcePhoneStatePermission(int pid, int uid) { |
| if (getContext().checkPermission(android.Manifest.permission.MODIFY_PHONE_STATE, pid, uid) |
| != PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException("Must hold the MODIFY_PHONE_STATE permission."); |
| } |
| } |
| |
| void sessionDied(MediaSessionRecord session) { |
| synchronized (mLock) { |
| destroySessionLocked(session); |
| } |
| } |
| |
| void destroySession(MediaSessionRecord session) { |
| synchronized (mLock) { |
| destroySessionLocked(session); |
| } |
| } |
| |
| private void updateUser() { |
| synchronized (mLock) { |
| int userId = ActivityManager.getCurrentUser(); |
| if (mCurrentUserId != userId) { |
| final int oldUserId = mCurrentUserId; |
| mCurrentUserId = userId; // do this first |
| |
| UserRecord oldUser = mUserRecords.get(oldUserId); |
| if (oldUser != null) { |
| oldUser.stopLocked(); |
| } |
| |
| UserRecord newUser = getOrCreateUser(userId); |
| newUser.startLocked(); |
| } |
| } |
| } |
| |
| private void updateActiveSessionListeners() { |
| synchronized (mLock) { |
| for (int i = mSessionsListeners.size() - 1; i >= 0; i--) { |
| SessionsListenerRecord listener = mSessionsListeners.get(i); |
| try { |
| enforceMediaPermissions(listener.mComponentName, listener.mPid, listener.mUid, |
| listener.mUserId); |
| } catch (SecurityException e) { |
| Log.i(TAG, "ActiveSessionsListener " + listener.mComponentName |
| + " is no longer authorized. Disconnecting."); |
| mSessionsListeners.remove(i); |
| try { |
| listener.mListener |
| .onActiveSessionsChanged(new ArrayList<MediaSession.Token>()); |
| } catch (Exception e1) { |
| // ignore |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Stop the user and unbind from everything. |
| * |
| * @param user The user to dispose of |
| */ |
| private void destroyUserLocked(UserRecord user) { |
| user.stopLocked(); |
| user.destroyLocked(); |
| mUserRecords.remove(user.mUserId); |
| } |
| |
| /* |
| * When a session is removed several things need to happen. |
| * 1. We need to remove it from the relevant user. |
| * 2. We need to remove it from the priority stack. |
| * 3. We need to remove it from all sessions. |
| * 4. If this is the system priority session we need to clear it. |
| * 5. We need to unlink to death from the cb binder |
| * 6. We need to tell the session to do any final cleanup (onDestroy) |
| */ |
| private void destroySessionLocked(MediaSessionRecord session) { |
| if (DEBUG) { |
| Log.d(TAG, "Destroying session : " + session.toString()); |
| } |
| int userId = session.getUserId(); |
| UserRecord user = mUserRecords.get(userId); |
| if (user != null) { |
| user.removeSessionLocked(session); |
| } |
| |
| mPriorityStack.removeSession(session); |
| mAllSessions.remove(session); |
| |
| try { |
| session.getCallback().asBinder().unlinkToDeath(session, 0); |
| } catch (Exception e) { |
| // ignore exceptions while destroying a session. |
| } |
| session.onDestroy(); |
| |
| mHandler.post(MessageHandler.MSG_SESSIONS_CHANGED, session.getUserId(), 0); |
| } |
| |
| private void enforcePackageName(String packageName, int uid) { |
| if (TextUtils.isEmpty(packageName)) { |
| throw new IllegalArgumentException("packageName may not be empty"); |
| } |
| String[] packages = getContext().getPackageManager().getPackagesForUid(uid); |
| final int packageCount = packages.length; |
| for (int i = 0; i < packageCount; i++) { |
| if (packageName.equals(packages[i])) { |
| return; |
| } |
| } |
| throw new IllegalArgumentException("packageName is not owned by the calling process"); |
| } |
| |
| /** |
| * Checks a caller's authorization to register an IRemoteControlDisplay. |
| * Authorization is granted if one of the following is true: |
| * <ul> |
| * <li>the caller has android.Manifest.permission.MEDIA_CONTENT_CONTROL |
| * permission</li> |
| * <li>the caller's listener is one of the enabled notification listeners |
| * for the caller's user</li> |
| * </ul> |
| */ |
| private void enforceMediaPermissions(ComponentName compName, int pid, int uid, |
| int resolvedUserId) { |
| if (isCurrentVolumeController(uid)) return; |
| if (getContext() |
| .checkPermission(android.Manifest.permission.MEDIA_CONTENT_CONTROL, pid, uid) |
| != PackageManager.PERMISSION_GRANTED |
| && !isEnabledNotificationListener(compName, UserHandle.getUserId(uid), |
| resolvedUserId)) { |
| throw new SecurityException("Missing permission to control media."); |
| } |
| } |
| |
| private boolean isCurrentVolumeController(int uid) { |
| if (mAudioManagerInternal != null) { |
| final int vcuid = mAudioManagerInternal.getVolumeControllerUid(); |
| if (vcuid > 0 && uid == vcuid) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private void enforceSystemUiPermission(String action, int pid, int uid) { |
| if (isCurrentVolumeController(uid)) return; |
| if (getContext().checkPermission(android.Manifest.permission.STATUS_BAR_SERVICE, |
| pid, uid) != PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException("Only system ui may " + action); |
| } |
| } |
| |
| /** |
| * This checks if the component is an enabled notification listener for the |
| * specified user. Enabled components may only operate on behalf of the user |
| * they're running as. |
| * |
| * @param compName The component that is enabled. |
| * @param userId The user id of the caller. |
| * @param forUserId The user id they're making the request on behalf of. |
| * @return True if the component is enabled, false otherwise |
| */ |
| private boolean isEnabledNotificationListener(ComponentName compName, int userId, |
| int forUserId) { |
| if (userId != forUserId) { |
| // You may not access another user's content as an enabled listener. |
| return false; |
| } |
| if (DEBUG) { |
| Log.d(TAG, "Checking if enabled notification listener " + compName); |
| } |
| if (compName != null) { |
| final String enabledNotifListeners = Settings.Secure.getStringForUser(mContentResolver, |
| Settings.Secure.ENABLED_NOTIFICATION_LISTENERS, |
| userId); |
| if (enabledNotifListeners != null) { |
| final String[] components = enabledNotifListeners.split(":"); |
| for (int i = 0; i < components.length; i++) { |
| final ComponentName component = |
| ComponentName.unflattenFromString(components[i]); |
| if (component != null) { |
| if (compName.equals(component)) { |
| if (DEBUG) { |
| Log.d(TAG, "ok to get sessions: " + component + |
| " is authorized notification listener"); |
| } |
| return true; |
| } |
| } |
| } |
| } |
| if (DEBUG) { |
| Log.d(TAG, "not ok to get sessions, " + compName + |
| " is not in list of ENABLED_NOTIFICATION_LISTENERS for user " + userId); |
| } |
| } |
| return false; |
| } |
| |
| private MediaSessionRecord createSessionInternal(int callerPid, int callerUid, int userId, |
| String callerPackageName, ISessionCallback cb, String tag) throws RemoteException { |
| synchronized (mLock) { |
| return createSessionLocked(callerPid, callerUid, userId, callerPackageName, cb, tag); |
| } |
| } |
| |
| /* |
| * When a session is created the following things need to happen. |
| * 1. Its callback binder needs a link to death |
| * 2. It needs to be added to all sessions. |
| * 3. It needs to be added to the priority stack. |
| * 4. It needs to be added to the relevant user record. |
| */ |
| private MediaSessionRecord createSessionLocked(int callerPid, int callerUid, int userId, |
| String callerPackageName, ISessionCallback cb, String tag) { |
| |
| final MediaSessionRecord session = new MediaSessionRecord(callerPid, callerUid, userId, |
| callerPackageName, cb, tag, this, mHandler); |
| try { |
| cb.asBinder().linkToDeath(session, 0); |
| } catch (RemoteException e) { |
| throw new RuntimeException("Media Session owner died prematurely.", e); |
| } |
| |
| mAllSessions.add(session); |
| mPriorityStack.addSession(session); |
| |
| UserRecord user = getOrCreateUser(userId); |
| user.addSessionLocked(session); |
| |
| mHandler.post(MessageHandler.MSG_SESSIONS_CHANGED, userId, 0); |
| |
| if (DEBUG) { |
| Log.d(TAG, "Created session for package " + callerPackageName + " with tag " + tag); |
| } |
| return session; |
| } |
| |
| private UserRecord getOrCreateUser(int userId) { |
| UserRecord user = mUserRecords.get(userId); |
| if (user == null) { |
| user = new UserRecord(getContext(), userId); |
| mUserRecords.put(userId, user); |
| } |
| return user; |
| } |
| |
| private int findIndexOfSessionsListenerLocked(IActiveSessionsListener listener) { |
| for (int i = mSessionsListeners.size() - 1; i >= 0; i--) { |
| if (mSessionsListeners.get(i).mListener.asBinder() == listener.asBinder()) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| private void pushSessionsChanged(int userId) { |
| synchronized (mLock) { |
| List<MediaSessionRecord> records = mPriorityStack.getActiveSessions(userId); |
| int size = records.size(); |
| if (size > 0 && records.get(0).isPlaybackActive(false)) { |
| rememberMediaButtonReceiverLocked(records.get(0)); |
| } |
| ArrayList<MediaSession.Token> tokens = new ArrayList<MediaSession.Token>(); |
| for (int i = 0; i < size; i++) { |
| tokens.add(new MediaSession.Token(records.get(i).getControllerBinder())); |
| } |
| pushRemoteVolumeUpdateLocked(userId); |
| for (int i = mSessionsListeners.size() - 1; i >= 0; i--) { |
| SessionsListenerRecord record = mSessionsListeners.get(i); |
| if (record.mUserId == UserHandle.USER_ALL || record.mUserId == userId) { |
| try { |
| record.mListener.onActiveSessionsChanged(tokens); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Dead ActiveSessionsListener in pushSessionsChanged, removing", |
| e); |
| mSessionsListeners.remove(i); |
| } |
| } |
| } |
| } |
| } |
| |
| private void pushRemoteVolumeUpdateLocked(int userId) { |
| if (mRvc != null) { |
| try { |
| MediaSessionRecord record = mPriorityStack.getDefaultRemoteSession(userId); |
| mRvc.updateRemoteController(record == null ? null : record.getControllerBinder()); |
| } catch (RemoteException e) { |
| Log.wtf(TAG, "Error sending default remote volume to sys ui.", e); |
| } |
| } |
| } |
| |
| private void rememberMediaButtonReceiverLocked(MediaSessionRecord record) { |
| PendingIntent receiver = record.getMediaButtonReceiver(); |
| UserRecord user = mUserRecords.get(record.getUserId()); |
| if (receiver != null && user != null) { |
| user.mLastMediaButtonReceiver = receiver; |
| ComponentName component = receiver.getIntent().getComponent(); |
| if (component != null && record.getPackageName().equals(component.getPackageName())) { |
| Settings.Secure.putStringForUser(mContentResolver, |
| Settings.System.MEDIA_BUTTON_RECEIVER, component.flattenToString(), |
| record.getUserId()); |
| } |
| } |
| } |
| |
| /** |
| * Information about a particular user. The contents of this object is |
| * guarded by mLock. |
| */ |
| final class UserRecord { |
| private final int mUserId; |
| private final ArrayList<MediaSessionRecord> mSessions = new ArrayList<MediaSessionRecord>(); |
| private final Context mContext; |
| private PendingIntent mLastMediaButtonReceiver; |
| private ComponentName mRestoredMediaButtonReceiver; |
| |
| public UserRecord(Context context, int userId) { |
| mContext = context; |
| mUserId = userId; |
| restoreMediaButtonReceiver(); |
| } |
| |
| public void startLocked() { |
| } |
| |
| public void stopLocked() { |
| // nothing for now |
| } |
| |
| public void destroyLocked() { |
| for (int i = mSessions.size() - 1; i >= 0; i--) { |
| MediaSessionRecord session = mSessions.get(i); |
| MediaSessionService.this.destroySessionLocked(session); |
| } |
| } |
| |
| public ArrayList<MediaSessionRecord> getSessionsLocked() { |
| return mSessions; |
| } |
| |
| public void addSessionLocked(MediaSessionRecord session) { |
| mSessions.add(session); |
| } |
| |
| public void removeSessionLocked(MediaSessionRecord session) { |
| mSessions.remove(session); |
| } |
| |
| public void dumpLocked(PrintWriter pw, String prefix) { |
| pw.println(prefix + "Record for user " + mUserId); |
| String indent = prefix + " "; |
| pw.println(indent + "MediaButtonReceiver:" + mLastMediaButtonReceiver); |
| pw.println(indent + "Restored ButtonReceiver:" + mRestoredMediaButtonReceiver); |
| int size = mSessions.size(); |
| pw.println(indent + size + " Sessions:"); |
| for (int i = 0; i < size; i++) { |
| // Just print the short version, the full session dump will |
| // already be in the list of all sessions. |
| pw.println(indent + mSessions.get(i).toString()); |
| } |
| } |
| |
| private void restoreMediaButtonReceiver() { |
| String receiverName = Settings.Secure.getStringForUser(mContentResolver, |
| Settings.System.MEDIA_BUTTON_RECEIVER, UserHandle.USER_CURRENT); |
| if (!TextUtils.isEmpty(receiverName)) { |
| ComponentName eventReceiver = ComponentName.unflattenFromString(receiverName); |
| if (eventReceiver == null) { |
| // an invalid name was persisted |
| return; |
| } |
| mRestoredMediaButtonReceiver = eventReceiver; |
| } |
| } |
| } |
| |
| final class SessionsListenerRecord implements IBinder.DeathRecipient { |
| private final IActiveSessionsListener mListener; |
| private final ComponentName mComponentName; |
| private final int mUserId; |
| private final int mPid; |
| private final int mUid; |
| |
| public SessionsListenerRecord(IActiveSessionsListener listener, |
| ComponentName componentName, |
| int userId, int pid, int uid) { |
| mListener = listener; |
| mComponentName = componentName; |
| mUserId = userId; |
| mPid = pid; |
| mUid = uid; |
| } |
| |
| @Override |
| public void binderDied() { |
| synchronized (mLock) { |
| mSessionsListeners.remove(this); |
| } |
| } |
| } |
| |
| final class SettingsObserver extends ContentObserver { |
| private final Uri mSecureSettingsUri = Settings.Secure.getUriFor( |
| Settings.Secure.ENABLED_NOTIFICATION_LISTENERS); |
| |
| private SettingsObserver() { |
| super(null); |
| } |
| |
| private void observe() { |
| mContentResolver.registerContentObserver(mSecureSettingsUri, |
| false, this, UserHandle.USER_ALL); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange, Uri uri) { |
| updateActiveSessionListeners(); |
| } |
| } |
| |
| class SessionManagerImpl extends ISessionManager.Stub { |
| private static final String EXTRA_WAKELOCK_ACQUIRED = |
| "android.media.AudioService.WAKELOCK_ACQUIRED"; |
| private static final int WAKELOCK_RELEASE_ON_FINISHED = 1980; // magic number |
| |
| private boolean mVoiceButtonDown = false; |
| private boolean mVoiceButtonHandled = false; |
| |
| @Override |
| public ISession createSession(String packageName, ISessionCallback cb, String tag, |
| int userId) throws RemoteException { |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| enforcePackageName(packageName, uid); |
| int resolvedUserId = ActivityManager.handleIncomingUser(pid, uid, userId, |
| false /* allowAll */, true /* requireFull */, "createSession", packageName); |
| if (cb == null) { |
| throw new IllegalArgumentException("Controller callback cannot be null"); |
| } |
| return createSessionInternal(pid, uid, resolvedUserId, packageName, cb, tag) |
| .getSessionBinder(); |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public List<IBinder> getSessions(ComponentName componentName, int userId) { |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| final long token = Binder.clearCallingIdentity(); |
| |
| try { |
| int resolvedUserId = verifySessionsRequest(componentName, userId, pid, uid); |
| ArrayList<IBinder> binders = new ArrayList<IBinder>(); |
| synchronized (mLock) { |
| ArrayList<MediaSessionRecord> records = mPriorityStack |
| .getActiveSessions(resolvedUserId); |
| int size = records.size(); |
| for (int i = 0; i < size; i++) { |
| binders.add(records.get(i).getControllerBinder().asBinder()); |
| } |
| } |
| return binders; |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public void addSessionsListener(IActiveSessionsListener listener, |
| ComponentName componentName, int userId) throws RemoteException { |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| final long token = Binder.clearCallingIdentity(); |
| |
| try { |
| int resolvedUserId = verifySessionsRequest(componentName, userId, pid, uid); |
| synchronized (mLock) { |
| int index = findIndexOfSessionsListenerLocked(listener); |
| if (index != -1) { |
| Log.w(TAG, "ActiveSessionsListener is already added, ignoring"); |
| return; |
| } |
| SessionsListenerRecord record = new SessionsListenerRecord(listener, |
| componentName, resolvedUserId, pid, uid); |
| try { |
| listener.asBinder().linkToDeath(record, 0); |
| } catch (RemoteException e) { |
| Log.e(TAG, "ActiveSessionsListener is dead, ignoring it", e); |
| return; |
| } |
| mSessionsListeners.add(record); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public void removeSessionsListener(IActiveSessionsListener listener) |
| throws RemoteException { |
| synchronized (mLock) { |
| int index = findIndexOfSessionsListenerLocked(listener); |
| if (index != -1) { |
| SessionsListenerRecord record = mSessionsListeners.remove(index); |
| try { |
| record.mListener.asBinder().unlinkToDeath(record, 0); |
| } catch (Exception e) { |
| // ignore exceptions, the record is being removed |
| } |
| } |
| } |
| } |
| |
| /** |
| * Handles the dispatching of the media button events to one of the |
| * registered listeners, or if there was none, broadcast an |
| * ACTION_MEDIA_BUTTON intent to the rest of the system. |
| * |
| * @param keyEvent a non-null KeyEvent whose key code is one of the |
| * supported media buttons |
| * @param needWakeLock true if a PARTIAL_WAKE_LOCK needs to be held |
| * while this key event is dispatched. |
| */ |
| @Override |
| public void dispatchMediaKeyEvent(KeyEvent keyEvent, boolean needWakeLock) { |
| if (keyEvent == null || !KeyEvent.isMediaKey(keyEvent.getKeyCode())) { |
| Log.w(TAG, "Attempted to dispatch null or non-media key event."); |
| return; |
| } |
| |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| if (DEBUG) { |
| Log.d(TAG, "dispatchMediaKeyEvent, pid=" + pid + ", uid=" + uid + ", event=" |
| + keyEvent); |
| } |
| if (!isUserSetupComplete()) { |
| // Global media key handling can have the side-effect of starting new |
| // activities which is undesirable while setup is in progress. |
| Slog.i(TAG, "Not dispatching media key event because user " |
| + "setup is in progress."); |
| return; |
| } |
| if (isGlobalPriorityActive() && uid != Process.SYSTEM_UID) { |
| // Prevent dispatching key event through reflection while the global priority |
| // session is active. |
| Slog.i(TAG, "Only the system can dispatch media key event " |
| + "to the global priority session."); |
| return; |
| } |
| |
| synchronized (mLock) { |
| // If we don't have a media button receiver to fall back on |
| // include non-playing sessions for dispatching |
| UserRecord ur = mUserRecords.get(mCurrentUserId); |
| boolean useNotPlayingSessions = (ur == null) || |
| (ur.mLastMediaButtonReceiver == null |
| && ur.mRestoredMediaButtonReceiver == null); |
| MediaSessionRecord session = mPriorityStack |
| .getDefaultMediaButtonSession(mCurrentUserId, useNotPlayingSessions); |
| if (isVoiceKey(keyEvent.getKeyCode())) { |
| handleVoiceKeyEventLocked(keyEvent, needWakeLock, session); |
| } else { |
| dispatchMediaKeyEventLocked(keyEvent, needWakeLock, session); |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public void dispatchAdjustVolume(int suggestedStream, int delta, int flags) { |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mLock) { |
| MediaSessionRecord session = mPriorityStack |
| .getDefaultVolumeSession(mCurrentUserId); |
| dispatchAdjustVolumeLocked(suggestedStream, delta, flags, session); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public void setRemoteVolumeController(IRemoteVolumeController rvc) { |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| enforceSystemUiPermission("listen for volume changes", pid, uid); |
| mRvc = rvc; |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override |
| public boolean isGlobalPriorityActive() { |
| return mPriorityStack.isGlobalPriorityActive(); |
| } |
| |
| @Override |
| public void dump(FileDescriptor fd, final PrintWriter pw, String[] args) { |
| if (getContext().checkCallingOrSelfPermission(Manifest.permission.DUMP) |
| != PackageManager.PERMISSION_GRANTED) { |
| pw.println("Permission Denial: can't dump MediaSessionService from from pid=" |
| + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid()); |
| return; |
| } |
| |
| pw.println("MEDIA SESSION SERVICE (dumpsys media_session)"); |
| pw.println(); |
| |
| synchronized (mLock) { |
| pw.println(mSessionsListeners.size() + " sessions listeners."); |
| int count = mAllSessions.size(); |
| pw.println(count + " Sessions:"); |
| for (int i = 0; i < count; i++) { |
| mAllSessions.get(i).dump(pw, ""); |
| pw.println(); |
| } |
| mPriorityStack.dump(pw, ""); |
| |
| pw.println("User Records:"); |
| count = mUserRecords.size(); |
| for (int i = 0; i < count; i++) { |
| UserRecord user = mUserRecords.get(mUserRecords.keyAt(i)); |
| user.dumpLocked(pw, ""); |
| } |
| } |
| } |
| |
| private int verifySessionsRequest(ComponentName componentName, int userId, final int pid, |
| final int uid) { |
| String packageName = null; |
| if (componentName != null) { |
| // If they gave us a component name verify they own the |
| // package |
| packageName = componentName.getPackageName(); |
| enforcePackageName(packageName, uid); |
| } |
| // Check that they can make calls on behalf of the user and |
| // get the final user id |
| int resolvedUserId = ActivityManager.handleIncomingUser(pid, uid, userId, |
| true /* allowAll */, true /* requireFull */, "getSessions", packageName); |
| // Check if they have the permissions or their component is |
| // enabled for the user they're calling from. |
| enforceMediaPermissions(componentName, pid, uid, resolvedUserId); |
| return resolvedUserId; |
| } |
| |
| private void dispatchAdjustVolumeLocked(int suggestedStream, int direction, int flags, |
| MediaSessionRecord session) { |
| if (DEBUG) { |
| String description = session == null ? null : session.toString(); |
| Log.d(TAG, "Adjusting session " + description + " by " + direction + ". flags=" |
| + flags + ", suggestedStream=" + suggestedStream); |
| |
| } |
| boolean preferSuggestedStream = false; |
| if (isValidLocalStreamType(suggestedStream) |
| && AudioSystem.isStreamActive(suggestedStream, 0)) { |
| preferSuggestedStream = true; |
| } |
| if (session == null || preferSuggestedStream) { |
| if ((flags & AudioManager.FLAG_ACTIVE_MEDIA_ONLY) != 0 |
| && !AudioSystem.isStreamActive(AudioManager.STREAM_MUSIC, 0)) { |
| if (DEBUG) { |
| Log.d(TAG, "No active session to adjust, skipping media only volume event"); |
| } |
| return; |
| } |
| try { |
| String packageName = getContext().getOpPackageName(); |
| mAudioService.adjustSuggestedStreamVolume(direction, suggestedStream, |
| flags, packageName, TAG); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error adjusting default volume.", e); |
| } |
| } else { |
| session.adjustVolume(direction, flags, getContext().getPackageName(), |
| UserHandle.myUserId(), true); |
| } |
| } |
| |
| private void handleVoiceKeyEventLocked(KeyEvent keyEvent, boolean needWakeLock, |
| MediaSessionRecord session) { |
| if (session != null && session.hasFlag(MediaSession.FLAG_EXCLUSIVE_GLOBAL_PRIORITY)) { |
| // If the phone app has priority just give it the event |
| dispatchMediaKeyEventLocked(keyEvent, needWakeLock, session); |
| return; |
| } |
| int action = keyEvent.getAction(); |
| boolean isLongPress = (keyEvent.getFlags() & KeyEvent.FLAG_LONG_PRESS) != 0; |
| if (action == KeyEvent.ACTION_DOWN) { |
| if (keyEvent.getRepeatCount() == 0) { |
| mVoiceButtonDown = true; |
| mVoiceButtonHandled = false; |
| } else if (mVoiceButtonDown && !mVoiceButtonHandled && isLongPress) { |
| mVoiceButtonHandled = true; |
| startVoiceInput(needWakeLock); |
| } |
| } else if (action == KeyEvent.ACTION_UP) { |
| if (mVoiceButtonDown) { |
| mVoiceButtonDown = false; |
| if (!mVoiceButtonHandled && !keyEvent.isCanceled()) { |
| // Resend the down then send this event through |
| KeyEvent downEvent = KeyEvent.changeAction(keyEvent, KeyEvent.ACTION_DOWN); |
| dispatchMediaKeyEventLocked(downEvent, needWakeLock, session); |
| dispatchMediaKeyEventLocked(keyEvent, needWakeLock, session); |
| } |
| } |
| } |
| } |
| |
| private void dispatchMediaKeyEventLocked(KeyEvent keyEvent, boolean needWakeLock, |
| MediaSessionRecord session) { |
| if (session != null) { |
| if (DEBUG) { |
| Log.d(TAG, "Sending media key to " + session.toString()); |
| } |
| if (needWakeLock) { |
| mKeyEventReceiver.aquireWakeLockLocked(); |
| } |
| // If we don't need a wakelock use -1 as the id so we |
| // won't release it later |
| session.sendMediaButton(keyEvent, |
| needWakeLock ? mKeyEventReceiver.mLastTimeoutId : -1, |
| mKeyEventReceiver, getContext().getApplicationInfo().uid, |
| getContext().getPackageName()); |
| } else { |
| // Launch the last PendingIntent we had with priority |
| UserRecord user = mUserRecords.get(mCurrentUserId); |
| if (user != null && (user.mLastMediaButtonReceiver != null |
| || user.mRestoredMediaButtonReceiver != null)) { |
| if (DEBUG) { |
| Log.d(TAG, "Sending media key to last known PendingIntent " |
| + user.mLastMediaButtonReceiver + " or restored Intent " |
| + user.mRestoredMediaButtonReceiver); |
| } |
| if (needWakeLock) { |
| mKeyEventReceiver.aquireWakeLockLocked(); |
| } |
| Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON); |
| mediaButtonIntent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND); |
| mediaButtonIntent.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); |
| try { |
| if (user.mLastMediaButtonReceiver != null) { |
| user.mLastMediaButtonReceiver.send(getContext(), |
| needWakeLock ? mKeyEventReceiver.mLastTimeoutId : -1, |
| mediaButtonIntent, mKeyEventReceiver, mHandler); |
| } else { |
| mediaButtonIntent.setComponent(user.mRestoredMediaButtonReceiver); |
| getContext().sendBroadcastAsUser(mediaButtonIntent, |
| new UserHandle(mCurrentUserId)); |
| } |
| } catch (CanceledException e) { |
| Log.i(TAG, "Error sending key event to media button receiver " |
| + user.mLastMediaButtonReceiver, e); |
| } |
| } else { |
| if (DEBUG) { |
| Log.d(TAG, "Sending media key ordered broadcast"); |
| } |
| if (needWakeLock) { |
| mMediaEventWakeLock.acquire(); |
| } |
| // Fallback to legacy behavior |
| Intent keyIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null); |
| keyIntent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND); |
| keyIntent.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); |
| if (needWakeLock) { |
| keyIntent.putExtra(EXTRA_WAKELOCK_ACQUIRED, |
| WAKELOCK_RELEASE_ON_FINISHED); |
| } |
| getContext().sendOrderedBroadcastAsUser(keyIntent, UserHandle.CURRENT, |
| null, mKeyEventDone, mHandler, Activity.RESULT_OK, null, null); |
| } |
| } |
| } |
| |
| private void startVoiceInput(boolean needWakeLock) { |
| Intent voiceIntent = null; |
| // select which type of search to launch: |
| // - screen on and device unlocked: action is ACTION_WEB_SEARCH |
| // - device locked or screen off: action is |
| // ACTION_VOICE_SEARCH_HANDS_FREE |
| // with EXTRA_SECURE set to true if the device is securely locked |
| PowerManager pm = (PowerManager) getContext().getSystemService(Context.POWER_SERVICE); |
| boolean isLocked = mKeyguardManager != null && mKeyguardManager.isKeyguardLocked(); |
| if (!isLocked && pm.isScreenOn()) { |
| voiceIntent = new Intent(android.speech.RecognizerIntent.ACTION_WEB_SEARCH); |
| Log.i(TAG, "voice-based interactions: about to use ACTION_WEB_SEARCH"); |
| } else { |
| voiceIntent = new Intent(RecognizerIntent.ACTION_VOICE_SEARCH_HANDS_FREE); |
| voiceIntent.putExtra(RecognizerIntent.EXTRA_SECURE, |
| isLocked && mKeyguardManager.isKeyguardSecure()); |
| Log.i(TAG, "voice-based interactions: about to use ACTION_VOICE_SEARCH_HANDS_FREE"); |
| } |
| // start the search activity |
| if (needWakeLock) { |
| mMediaEventWakeLock.acquire(); |
| } |
| try { |
| if (voiceIntent != null) { |
| voiceIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
| | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); |
| getContext().startActivityAsUser(voiceIntent, UserHandle.CURRENT); |
| } |
| } catch (ActivityNotFoundException e) { |
| Log.w(TAG, "No activity for search: " + e); |
| } finally { |
| if (needWakeLock) { |
| mMediaEventWakeLock.release(); |
| } |
| } |
| } |
| |
| private boolean isVoiceKey(int keyCode) { |
| return keyCode == KeyEvent.KEYCODE_HEADSETHOOK; |
| } |
| |
| private boolean isUserSetupComplete() { |
| return Settings.Secure.getIntForUser(getContext().getContentResolver(), |
| Settings.Secure.USER_SETUP_COMPLETE, 0, UserHandle.USER_CURRENT) != 0; |
| } |
| |
| // we only handle public stream types, which are 0-5 |
| private boolean isValidLocalStreamType(int streamType) { |
| return streamType >= AudioManager.STREAM_VOICE_CALL |
| && streamType <= AudioManager.STREAM_NOTIFICATION; |
| } |
| |
| private KeyEventWakeLockReceiver mKeyEventReceiver = new KeyEventWakeLockReceiver(mHandler); |
| |
| class KeyEventWakeLockReceiver extends ResultReceiver implements Runnable, |
| PendingIntent.OnFinished { |
| private final Handler mHandler; |
| private int mRefCount = 0; |
| private int mLastTimeoutId = 0; |
| |
| public KeyEventWakeLockReceiver(Handler handler) { |
| super(handler); |
| mHandler = handler; |
| } |
| |
| public void onTimeout() { |
| synchronized (mLock) { |
| if (mRefCount == 0) { |
| // We've already released it, so just return |
| return; |
| } |
| mLastTimeoutId++; |
| mRefCount = 0; |
| releaseWakeLockLocked(); |
| } |
| } |
| |
| public void aquireWakeLockLocked() { |
| if (mRefCount == 0) { |
| mMediaEventWakeLock.acquire(); |
| } |
| mRefCount++; |
| mHandler.removeCallbacks(this); |
| mHandler.postDelayed(this, WAKELOCK_TIMEOUT); |
| |
| } |
| |
| @Override |
| public void run() { |
| onTimeout(); |
| } |
| |
| @Override |
| protected void onReceiveResult(int resultCode, Bundle resultData) { |
| if (resultCode < mLastTimeoutId) { |
| // Ignore results from calls that were before the last |
| // timeout, just in case. |
| return; |
| } else { |
| synchronized (mLock) { |
| if (mRefCount > 0) { |
| mRefCount--; |
| if (mRefCount == 0) { |
| releaseWakeLockLocked(); |
| } |
| } |
| } |
| } |
| } |
| |
| private void releaseWakeLockLocked() { |
| mMediaEventWakeLock.release(); |
| mHandler.removeCallbacks(this); |
| } |
| |
| @Override |
| public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, |
| String resultData, Bundle resultExtras) { |
| onReceiveResult(resultCode, null); |
| } |
| }; |
| |
| BroadcastReceiver mKeyEventDone = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (intent == null) { |
| return; |
| } |
| Bundle extras = intent.getExtras(); |
| if (extras == null) { |
| return; |
| } |
| synchronized (mLock) { |
| if (extras.containsKey(EXTRA_WAKELOCK_ACQUIRED) |
| && mMediaEventWakeLock.isHeld()) { |
| mMediaEventWakeLock.release(); |
| } |
| } |
| } |
| }; |
| } |
| |
| final class MessageHandler extends Handler { |
| private static final int MSG_SESSIONS_CHANGED = 1; |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_SESSIONS_CHANGED: |
| pushSessionsChanged(msg.arg1); |
| break; |
| } |
| } |
| |
| public void post(int what, int arg1, int arg2) { |
| obtainMessage(what, arg1, arg2).sendToTarget(); |
| } |
| } |
| } |
