/* * 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.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.MediaController.PlaybackInfo; import android.media.session.MediaSession; import android.media.session.MediaSessionManager; 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.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.SparseArray; import android.view.KeyEvent; 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 mAllSessions = new ArrayList(); private final SparseArray mUserRecords = new SparseArray(); private final ArrayList mSessionsListeners = new ArrayList(); private final Object mLock = new Object(); private final MessageHandler mHandler = new MessageHandler(); private final PowerManager.WakeLock mMediaEventWakeLock; private final boolean mUseMasterVolume; private KeyguardManager mKeyguardManager; private IAudioService mAudioService; private AudioManager mAudioManager; 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"); mUseMasterVolume = context.getResources().getBoolean( com.android.internal.R.bool.config_useMasterVolume); } @Override public void onStart() { publishBinderService(Context.MEDIA_SESSION_SERVICE, mSessionManagerImpl); Watchdog.getInstance().addMonitor(this); updateUser(); mKeyguardManager = (KeyguardManager) getContext().getSystemService(Context.KEYGUARD_SERVICE); mAudioService = getAudioService(); mAudioManager = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE); mContentResolver = getContext().getContentResolver(); mSettingsObserver = new SettingsObserver(); mSettingsObserver.observe(); } 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()); } 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) { 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: *
    *
  • the caller has android.Manifest.permission.MEDIA_CONTENT_CONTROL * permission
  • *
  • the caller's listener is one of the enabled notification listeners * for the caller's user
  • *
*/ private void enforceMediaPermissions(ComponentName compName, int pid, int uid, int resolvedUserId) { 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 void enforceStatusBarPermission(String action, int pid, int uid) { 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 boolean isSessionDiscoverable(MediaSessionRecord record) { // TODO probably want to check more than if it's active. return record.isActive(); } private void pushSessionsChanged(int userId) { synchronized (mLock) { List records = mPriorityStack.getActiveSessions(userId); int size = records.size(); if (size > 0 && records.get(0).isPlaybackActive(false)) { rememberMediaButtonReceiverLocked(records.get(0)); } ArrayList tokens = new ArrayList(); 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; } } /** * Information about a particular user. The contents of this object is * guarded by mLock. */ final class UserRecord { private final int mUserId; private final ArrayList mSessions = new ArrayList(); private PendingIntent mLastMediaButtonReceiver; public UserRecord(Context context, int userId) { mUserId = userId; } public void startLocked() { // nothing for now } 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 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); 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()); } } } 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 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 binders = new ArrayList(); synchronized (mLock) { ArrayList 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 { synchronized (mLock) { // If we don't have a media button receiver to fall back on // include non-playing sessions for dispatching boolean useNotPlayingSessions = mUserRecords.get( ActivityManager.getCurrentUser()).mLastMediaButtonReceiver == 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 { enforceStatusBarPermission("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(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(); if (mUseMasterVolume) { boolean isMasterMute = mAudioService.isMasterMute(); if (direction == MediaSessionManager.DIRECTION_MUTE) { mAudioService.setMasterMute(!isMasterMute, flags, packageName, mICallback); } else { mAudioService.adjustMasterVolume(direction, flags, packageName); // Do not call setMasterMute when direction = 0 which is used just to // show the UI. if (isMasterMute && direction != 0) { mAudioService.setMasterMute(false, flags, packageName, mICallback); } } } else { boolean isStreamMute = mAudioService.isStreamMute(suggestedStream); if (direction == MediaSessionManager.DIRECTION_MUTE) { mAudioManager.setStreamMute(suggestedStream, !isStreamMute); } else { mAudioService.adjustSuggestedStreamVolume(direction, suggestedStream, flags, packageName); // Do not call setStreamMute when direction = 0 which is used just to // show the UI. if (isStreamMute && direction != 0) { mAudioManager.setStreamMute(suggestedStream, false); } } } } 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); } else { // Launch the last PendingIntent we had with priority int userId = ActivityManager.getCurrentUser(); UserRecord user = mUserRecords.get(userId); if (user.mLastMediaButtonReceiver != null) { if (DEBUG) { Log.d(TAG, "Sending media key to last known PendingIntent"); } if (needWakeLock) { mKeyEventReceiver.aquireWakeLockLocked(); } Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON); mediaButtonIntent.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); try { user.mLastMediaButtonReceiver.send(getContext(), needWakeLock ? mKeyEventReceiver.mLastTimeoutId : -1, mediaButtonIntent, mKeyEventReceiver, null); } 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.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); if (needWakeLock) { keyIntent.putExtra(EXTRA_WAKELOCK_ACQUIRED, WAKELOCK_RELEASE_ON_FINISHED); } getContext().sendOrderedBroadcastAsUser(keyIntent, UserHandle.ALL, 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; } // 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(); } } }