| /* |
| * Copyright (C) 2013 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.audio; |
| |
| import android.app.AppOpsManager; |
| import android.content.Context; |
| import android.media.AudioAttributes; |
| import android.media.AudioFocusInfo; |
| import android.media.AudioManager; |
| import android.media.AudioSystem; |
| import android.media.IAudioFocusDispatcher; |
| import android.media.audiopolicy.IAudioPolicyCallback; |
| import android.os.Binder; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.Iterator; |
| import java.util.Stack; |
| import java.text.DateFormat; |
| |
| /** |
| * @hide |
| * |
| */ |
| public class MediaFocusControl implements PlayerFocusEnforcer { |
| |
| private static final String TAG = "MediaFocusControl"; |
| |
| /** |
| * set to true so the framework enforces ducking itself, without communicating to apps |
| * that they lost focus for most use cases. |
| */ |
| static final boolean ENFORCE_DUCKING = true; |
| /** |
| * set to true so the framework enforces muting media/game itself when the device is ringing |
| * or in a call. |
| */ |
| static final boolean ENFORCE_MUTING_FOR_RING_OR_CALL = true; |
| |
| private final Context mContext; |
| private final AppOpsManager mAppOps; |
| private PlayerFocusEnforcer mFocusEnforcer; // never null |
| |
| private boolean mRingOrCallActive = false; |
| |
| protected MediaFocusControl(Context cntxt, PlayerFocusEnforcer pfe) { |
| mContext = cntxt; |
| mAppOps = (AppOpsManager)mContext.getSystemService(Context.APP_OPS_SERVICE); |
| mFocusEnforcer = pfe; |
| } |
| |
| protected void dump(PrintWriter pw) { |
| pw.println("\nMediaFocusControl dump time: " |
| + DateFormat.getTimeInstance().format(new Date())); |
| dumpFocusStack(pw); |
| } |
| |
| //================================================================= |
| // PlayerFocusEnforcer implementation |
| @Override |
| public boolean duckPlayers(FocusRequester winner, FocusRequester loser) { |
| return mFocusEnforcer.duckPlayers(winner, loser); |
| } |
| |
| @Override |
| public void unduckPlayers(FocusRequester winner) { |
| mFocusEnforcer.unduckPlayers(winner); |
| } |
| |
| @Override |
| public void mutePlayersForCall(int[] usagesToMute) { |
| mFocusEnforcer.mutePlayersForCall(usagesToMute); |
| } |
| |
| @Override |
| public void unmutePlayersForCall() { |
| mFocusEnforcer.unmutePlayersForCall(); |
| } |
| |
| //========================================================================================== |
| // AudioFocus |
| //========================================================================================== |
| |
| private final static Object mAudioFocusLock = new Object(); |
| |
| /** |
| * Discard the current audio focus owner. |
| * Notify top of audio focus stack that it lost focus (regardless of possibility to reassign |
| * focus), remove it from the stack, and clear the remote control display. |
| */ |
| protected void discardAudioFocusOwner() { |
| synchronized(mAudioFocusLock) { |
| if (!mFocusStack.empty()) { |
| // notify the current focus owner it lost focus after removing it from stack |
| final FocusRequester exFocusOwner = mFocusStack.pop(); |
| exFocusOwner.handleFocusLoss(AudioManager.AUDIOFOCUS_LOSS, null); |
| exFocusOwner.release(); |
| } |
| } |
| } |
| |
| /** |
| * Called synchronized on mAudioFocusLock |
| */ |
| private void notifyTopOfAudioFocusStack() { |
| // notify the top of the stack it gained focus |
| if (!mFocusStack.empty()) { |
| if (canReassignAudioFocus()) { |
| mFocusStack.peek().handleFocusGain(AudioManager.AUDIOFOCUS_GAIN); |
| } |
| } |
| } |
| |
| /** |
| * Focus is requested, propagate the associated loss throughout the stack. |
| * @param focusGain the new focus gain that will later be added at the top of the stack |
| */ |
| private void propagateFocusLossFromGain_syncAf(int focusGain, final FocusRequester fr) { |
| // going through the audio focus stack to signal new focus, traversing order doesn't |
| // matter as all entries respond to the same external focus gain |
| Iterator<FocusRequester> stackIterator = mFocusStack.iterator(); |
| while(stackIterator.hasNext()) { |
| stackIterator.next().handleExternalFocusGain(focusGain, fr); |
| } |
| } |
| |
| private final Stack<FocusRequester> mFocusStack = new Stack<FocusRequester>(); |
| |
| /** |
| * Helper function: |
| * Display in the log the current entries in the audio focus stack |
| */ |
| private void dumpFocusStack(PrintWriter pw) { |
| pw.println("\nAudio Focus stack entries (last is top of stack):"); |
| synchronized(mAudioFocusLock) { |
| Iterator<FocusRequester> stackIterator = mFocusStack.iterator(); |
| while(stackIterator.hasNext()) { |
| stackIterator.next().dump(pw); |
| } |
| } |
| pw.println("\n"); |
| pw.println(" Notify on duck: " + mNotifyFocusOwnerOnDuck + "\n"); |
| pw.println(" In ring or call: " + mRingOrCallActive + "\n"); |
| } |
| |
| /** |
| * Helper function: |
| * Called synchronized on mAudioFocusLock |
| * Remove a focus listener from the focus stack. |
| * @param clientToRemove the focus listener |
| * @param signal if true and the listener was at the top of the focus stack, i.e. it was holding |
| * focus, notify the next item in the stack it gained focus. |
| */ |
| private void removeFocusStackEntry(String clientToRemove, boolean signal, |
| boolean notifyFocusFollowers) { |
| // is the current top of the focus stack abandoning focus? (because of request, not death) |
| if (!mFocusStack.empty() && mFocusStack.peek().hasSameClient(clientToRemove)) |
| { |
| //Log.i(TAG, " removeFocusStackEntry() removing top of stack"); |
| FocusRequester fr = mFocusStack.pop(); |
| fr.release(); |
| if (notifyFocusFollowers) { |
| final AudioFocusInfo afi = fr.toAudioFocusInfo(); |
| afi.clearLossReceived(); |
| notifyExtPolicyFocusLoss_syncAf(afi, false); |
| } |
| if (signal) { |
| // notify the new top of the stack it gained focus |
| notifyTopOfAudioFocusStack(); |
| } |
| } else { |
| // focus is abandoned by a client that's not at the top of the stack, |
| // no need to update focus. |
| // (using an iterator on the stack so we can safely remove an entry after having |
| // evaluated it, traversal order doesn't matter here) |
| Iterator<FocusRequester> stackIterator = mFocusStack.iterator(); |
| while(stackIterator.hasNext()) { |
| FocusRequester fr = stackIterator.next(); |
| if(fr.hasSameClient(clientToRemove)) { |
| Log.i(TAG, "AudioFocus removeFocusStackEntry(): removing entry for " |
| + clientToRemove); |
| stackIterator.remove(); |
| // stack entry not used anymore, clear references |
| fr.release(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Helper function: |
| * Called synchronized on mAudioFocusLock |
| * Remove focus listeners from the focus stack for a particular client when it has died. |
| */ |
| private void removeFocusStackEntryOnDeath(IBinder cb) { |
| // is the owner of the audio focus part of the client to remove? |
| boolean isTopOfStackForClientToRemove = !mFocusStack.isEmpty() && |
| mFocusStack.peek().hasSameBinder(cb); |
| // (using an iterator on the stack so we can safely remove an entry after having |
| // evaluated it, traversal order doesn't matter here) |
| Iterator<FocusRequester> stackIterator = mFocusStack.iterator(); |
| while(stackIterator.hasNext()) { |
| FocusRequester fr = stackIterator.next(); |
| if(fr.hasSameBinder(cb)) { |
| Log.i(TAG, "AudioFocus removeFocusStackEntryOnDeath(): removing entry for " + cb); |
| stackIterator.remove(); |
| // stack entry not used anymore, clear references |
| fr.release(); |
| } |
| } |
| if (isTopOfStackForClientToRemove) { |
| // we removed an entry at the top of the stack: |
| // notify the new top of the stack it gained focus. |
| notifyTopOfAudioFocusStack(); |
| } |
| } |
| |
| /** |
| * Helper function: |
| * Returns true if the system is in a state where the focus can be reevaluated, false otherwise. |
| * The implementation guarantees that a state where focus cannot be immediately reassigned |
| * implies that an "locked" focus owner is at the top of the focus stack. |
| * Modifications to the implementation that break this assumption will cause focus requests to |
| * misbehave when honoring the AudioManager.AUDIOFOCUS_FLAG_DELAY_OK flag. |
| */ |
| private boolean canReassignAudioFocus() { |
| // focus requests are rejected during a phone call or when the phone is ringing |
| // this is equivalent to IN_VOICE_COMM_FOCUS_ID having the focus |
| if (!mFocusStack.isEmpty() && isLockedFocusOwner(mFocusStack.peek())) { |
| return false; |
| } |
| return true; |
| } |
| |
| private boolean isLockedFocusOwner(FocusRequester fr) { |
| return (fr.hasSameClient(AudioSystem.IN_VOICE_COMM_FOCUS_ID) || fr.isLockedFocusOwner()); |
| } |
| |
| /** |
| * Helper function |
| * Pre-conditions: focus stack is not empty, there is one or more locked focus owner |
| * at the top of the focus stack |
| * Push the focus requester onto the audio focus stack at the first position immediately |
| * following the locked focus owners. |
| * @return {@link AudioManager#AUDIOFOCUS_REQUEST_GRANTED} or |
| * {@link AudioManager#AUDIOFOCUS_REQUEST_DELAYED} |
| */ |
| private int pushBelowLockedFocusOwners(FocusRequester nfr) { |
| int lastLockedFocusOwnerIndex = mFocusStack.size(); |
| for (int index = mFocusStack.size()-1; index >= 0; index--) { |
| if (isLockedFocusOwner(mFocusStack.elementAt(index))) { |
| lastLockedFocusOwnerIndex = index; |
| } |
| } |
| if (lastLockedFocusOwnerIndex == mFocusStack.size()) { |
| // this should not happen, but handle it and log an error |
| Log.e(TAG, "No exclusive focus owner found in propagateFocusLossFromGain_syncAf()", |
| new Exception()); |
| // no exclusive owner, push at top of stack, focus is granted, propagate change |
| propagateFocusLossFromGain_syncAf(nfr.getGainRequest(), nfr); |
| mFocusStack.push(nfr); |
| return AudioManager.AUDIOFOCUS_REQUEST_GRANTED; |
| } else { |
| mFocusStack.insertElementAt(nfr, lastLockedFocusOwnerIndex); |
| return AudioManager.AUDIOFOCUS_REQUEST_DELAYED; |
| } |
| } |
| |
| /** |
| * Inner class to monitor audio focus client deaths, and remove them from the audio focus |
| * stack if necessary. |
| */ |
| protected class AudioFocusDeathHandler implements IBinder.DeathRecipient { |
| private IBinder mCb; // To be notified of client's death |
| |
| AudioFocusDeathHandler(IBinder cb) { |
| mCb = cb; |
| } |
| |
| public void binderDied() { |
| synchronized(mAudioFocusLock) { |
| removeFocusStackEntryOnDeath(mCb); |
| } |
| } |
| } |
| |
| /** |
| * Indicates whether to notify an audio focus owner when it loses focus |
| * with {@link AudioManager#AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK} if it will only duck. |
| * This variable being false indicates an AudioPolicy has been registered and has signaled |
| * it will handle audio ducking. |
| */ |
| private boolean mNotifyFocusOwnerOnDuck = true; |
| |
| protected void setDuckingInExtPolicyAvailable(boolean available) { |
| mNotifyFocusOwnerOnDuck = !available; |
| } |
| |
| boolean mustNotifyFocusOwnerOnDuck() { return mNotifyFocusOwnerOnDuck; } |
| |
| private ArrayList<IAudioPolicyCallback> mFocusFollowers = new ArrayList<IAudioPolicyCallback>(); |
| |
| void addFocusFollower(IAudioPolicyCallback ff) { |
| if (ff == null) { |
| return; |
| } |
| synchronized(mAudioFocusLock) { |
| boolean found = false; |
| for (IAudioPolicyCallback pcb : mFocusFollowers) { |
| if (pcb.asBinder().equals(ff.asBinder())) { |
| found = true; |
| break; |
| } |
| } |
| if (found) { |
| return; |
| } else { |
| mFocusFollowers.add(ff); |
| notifyExtPolicyCurrentFocusAsync(ff); |
| } |
| } |
| } |
| |
| void removeFocusFollower(IAudioPolicyCallback ff) { |
| if (ff == null) { |
| return; |
| } |
| synchronized(mAudioFocusLock) { |
| for (IAudioPolicyCallback pcb : mFocusFollowers) { |
| if (pcb.asBinder().equals(ff.asBinder())) { |
| mFocusFollowers.remove(pcb); |
| break; |
| } |
| } |
| } |
| } |
| |
| /** |
| * @param pcb non null |
| */ |
| void notifyExtPolicyCurrentFocusAsync(IAudioPolicyCallback pcb) { |
| final IAudioPolicyCallback pcb2 = pcb; |
| final Thread thread = new Thread() { |
| @Override |
| public void run() { |
| synchronized(mAudioFocusLock) { |
| if (mFocusStack.isEmpty()) { |
| return; |
| } |
| try { |
| pcb2.notifyAudioFocusGrant(mFocusStack.peek().toAudioFocusInfo(), |
| // top of focus stack always has focus |
| AudioManager.AUDIOFOCUS_REQUEST_GRANTED); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Can't call notifyAudioFocusGrant() on IAudioPolicyCallback " |
| + pcb2.asBinder(), e); |
| } |
| } |
| } |
| }; |
| thread.start(); |
| } |
| |
| /** |
| * Called synchronized on mAudioFocusLock |
| */ |
| void notifyExtPolicyFocusGrant_syncAf(AudioFocusInfo afi, int requestResult) { |
| for (IAudioPolicyCallback pcb : mFocusFollowers) { |
| try { |
| // oneway |
| pcb.notifyAudioFocusGrant(afi, requestResult); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Can't call notifyAudioFocusGrant() on IAudioPolicyCallback " |
| + pcb.asBinder(), e); |
| } |
| } |
| } |
| |
| /** |
| * Called synchronized on mAudioFocusLock |
| */ |
| void notifyExtPolicyFocusLoss_syncAf(AudioFocusInfo afi, boolean wasDispatched) { |
| for (IAudioPolicyCallback pcb : mFocusFollowers) { |
| try { |
| // oneway |
| pcb.notifyAudioFocusLoss(afi, wasDispatched); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Can't call notifyAudioFocusLoss() on IAudioPolicyCallback " |
| + pcb.asBinder(), e); |
| } |
| } |
| } |
| |
| protected int getCurrentAudioFocus() { |
| synchronized(mAudioFocusLock) { |
| if (mFocusStack.empty()) { |
| return AudioManager.AUDIOFOCUS_NONE; |
| } else { |
| return mFocusStack.peek().getGainRequest(); |
| } |
| } |
| } |
| |
| /** |
| * Delay after entering ringing or call mode after which the framework will mute streams |
| * that are still playing. |
| */ |
| private static final int RING_CALL_MUTING_ENFORCEMENT_DELAY_MS = 100; |
| |
| /** |
| * Usages to mute when the device rings or is in a call |
| */ |
| private final static int[] USAGES_TO_MUTE_IN_RING_OR_CALL = |
| { AudioAttributes.USAGE_MEDIA, AudioAttributes.USAGE_GAME }; |
| |
| /** |
| * Return the volume ramp time expected before playback with the given AudioAttributes would |
| * start after gaining audio focus. |
| * @param attr attributes of the sound about to start playing |
| * @return time in ms |
| */ |
| protected static int getFocusRampTimeMs(int focusGain, AudioAttributes attr) { |
| switch (attr.getUsage()) { |
| case AudioAttributes.USAGE_MEDIA: |
| case AudioAttributes.USAGE_GAME: |
| return 1000; |
| case AudioAttributes.USAGE_ALARM: |
| case AudioAttributes.USAGE_NOTIFICATION_RINGTONE: |
| case AudioAttributes.USAGE_ASSISTANT: |
| case AudioAttributes.USAGE_ASSISTANCE_ACCESSIBILITY: |
| case AudioAttributes.USAGE_ASSISTANCE_NAVIGATION_GUIDANCE: |
| return 700; |
| case AudioAttributes.USAGE_VOICE_COMMUNICATION: |
| case AudioAttributes.USAGE_VOICE_COMMUNICATION_SIGNALLING: |
| case AudioAttributes.USAGE_NOTIFICATION: |
| case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_REQUEST: |
| case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_INSTANT: |
| case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_DELAYED: |
| case AudioAttributes.USAGE_NOTIFICATION_EVENT: |
| case AudioAttributes.USAGE_ASSISTANCE_SONIFICATION: |
| return 500; |
| case AudioAttributes.USAGE_UNKNOWN: |
| default: |
| return 0; |
| } |
| } |
| |
| /** @see AudioManager#requestAudioFocus(AudioManager.OnAudioFocusChangeListener, int, int, int) */ |
| protected int requestAudioFocus(AudioAttributes aa, int focusChangeHint, IBinder cb, |
| IAudioFocusDispatcher fd, String clientId, String callingPackageName, int flags) { |
| Log.i(TAG, " AudioFocus requestAudioFocus() from uid/pid " + Binder.getCallingUid() |
| + "/" + Binder.getCallingPid() |
| + " clientId=" + clientId |
| + " req=" + focusChangeHint |
| + " flags=0x" + Integer.toHexString(flags)); |
| // we need a valid binder callback for clients |
| if (!cb.pingBinder()) { |
| Log.e(TAG, " AudioFocus DOA client for requestAudioFocus(), aborting."); |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } |
| |
| if (mAppOps.noteOp(AppOpsManager.OP_TAKE_AUDIO_FOCUS, Binder.getCallingUid(), |
| callingPackageName) != AppOpsManager.MODE_ALLOWED) { |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } |
| |
| synchronized(mAudioFocusLock) { |
| boolean enteringRingOrCall = !mRingOrCallActive |
| & (AudioSystem.IN_VOICE_COMM_FOCUS_ID.compareTo(clientId) == 0); |
| if (enteringRingOrCall) { mRingOrCallActive = true; } |
| |
| boolean focusGrantDelayed = false; |
| if (!canReassignAudioFocus()) { |
| if ((flags & AudioManager.AUDIOFOCUS_FLAG_DELAY_OK) == 0) { |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } else { |
| // request has AUDIOFOCUS_FLAG_DELAY_OK: focus can't be |
| // granted right now, so the requester will be inserted in the focus stack |
| // to receive focus later |
| focusGrantDelayed = true; |
| } |
| } |
| |
| // handle the potential premature death of the new holder of the focus |
| // (premature death == death before abandoning focus) |
| // Register for client death notification |
| AudioFocusDeathHandler afdh = new AudioFocusDeathHandler(cb); |
| |
| try { |
| cb.linkToDeath(afdh, 0); |
| } catch (RemoteException e) { |
| // client has already died! |
| Log.w(TAG, "AudioFocus requestAudioFocus() could not link to "+cb+" binder death"); |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } |
| |
| if (!mFocusStack.empty() && mFocusStack.peek().hasSameClient(clientId)) { |
| // if focus is already owned by this client and the reason for acquiring the focus |
| // hasn't changed, don't do anything |
| final FocusRequester fr = mFocusStack.peek(); |
| if (fr.getGainRequest() == focusChangeHint && fr.getGrantFlags() == flags) { |
| // unlink death handler so it can be gc'ed. |
| // linkToDeath() creates a JNI global reference preventing collection. |
| cb.unlinkToDeath(afdh, 0); |
| notifyExtPolicyFocusGrant_syncAf(fr.toAudioFocusInfo(), |
| AudioManager.AUDIOFOCUS_REQUEST_GRANTED); |
| return AudioManager.AUDIOFOCUS_REQUEST_GRANTED; |
| } |
| // the reason for the audio focus request has changed: remove the current top of |
| // stack and respond as if we had a new focus owner |
| if (!focusGrantDelayed) { |
| mFocusStack.pop(); |
| // the entry that was "popped" is the same that was "peeked" above |
| fr.release(); |
| } |
| } |
| |
| // focus requester might already be somewhere below in the stack, remove it |
| removeFocusStackEntry(clientId, false /* signal */, false /*notifyFocusFollowers*/); |
| |
| final FocusRequester nfr = new FocusRequester(aa, focusChangeHint, flags, fd, cb, |
| clientId, afdh, callingPackageName, Binder.getCallingUid(), this); |
| if (focusGrantDelayed) { |
| // focusGrantDelayed being true implies we can't reassign focus right now |
| // which implies the focus stack is not empty. |
| final int requestResult = pushBelowLockedFocusOwners(nfr); |
| if (requestResult != AudioManager.AUDIOFOCUS_REQUEST_FAILED) { |
| notifyExtPolicyFocusGrant_syncAf(nfr.toAudioFocusInfo(), requestResult); |
| } |
| return requestResult; |
| } else { |
| // propagate the focus change through the stack |
| if (!mFocusStack.empty()) { |
| propagateFocusLossFromGain_syncAf(focusChangeHint, nfr); |
| } |
| |
| // push focus requester at the top of the audio focus stack |
| mFocusStack.push(nfr); |
| } |
| notifyExtPolicyFocusGrant_syncAf(nfr.toAudioFocusInfo(), |
| AudioManager.AUDIOFOCUS_REQUEST_GRANTED); |
| |
| if (ENFORCE_MUTING_FOR_RING_OR_CALL & enteringRingOrCall) { |
| runAudioCheckerForRingOrCallAsync(true/*enteringRingOrCall*/); |
| } |
| }//synchronized(mAudioFocusLock) |
| |
| return AudioManager.AUDIOFOCUS_REQUEST_GRANTED; |
| } |
| |
| /** |
| * @see AudioManager#abandonAudioFocus(AudioManager.OnAudioFocusChangeListener, AudioAttributes) |
| * */ |
| protected int abandonAudioFocus(IAudioFocusDispatcher fl, String clientId, AudioAttributes aa) { |
| // AudioAttributes are currently ignored, to be used for zones |
| Log.i(TAG, " AudioFocus abandonAudioFocus() from uid/pid " + Binder.getCallingUid() |
| + "/" + Binder.getCallingPid() |
| + " clientId=" + clientId); |
| try { |
| // this will take care of notifying the new focus owner if needed |
| synchronized(mAudioFocusLock) { |
| boolean exitingRingOrCall = mRingOrCallActive |
| & (AudioSystem.IN_VOICE_COMM_FOCUS_ID.compareTo(clientId) == 0); |
| if (exitingRingOrCall) { mRingOrCallActive = false; } |
| |
| removeFocusStackEntry(clientId, true /*signal*/, true /*notifyFocusFollowers*/); |
| |
| if (ENFORCE_MUTING_FOR_RING_OR_CALL & exitingRingOrCall) { |
| runAudioCheckerForRingOrCallAsync(false/*enteringRingOrCall*/); |
| } |
| } |
| } catch (java.util.ConcurrentModificationException cme) { |
| // Catching this exception here is temporary. It is here just to prevent |
| // a crash seen when the "Silent" notification is played. This is believed to be fixed |
| // but this try catch block is left just to be safe. |
| Log.e(TAG, "FATAL EXCEPTION AudioFocus abandonAudioFocus() caused " + cme); |
| cme.printStackTrace(); |
| } |
| |
| return AudioManager.AUDIOFOCUS_REQUEST_GRANTED; |
| } |
| |
| |
| protected void unregisterAudioFocusClient(String clientId) { |
| synchronized(mAudioFocusLock) { |
| removeFocusStackEntry(clientId, false, true /*notifyFocusFollowers*/); |
| } |
| } |
| |
| private void runAudioCheckerForRingOrCallAsync(final boolean enteringRingOrCall) { |
| new Thread() { |
| public void run() { |
| if (enteringRingOrCall) { |
| try { |
| Thread.sleep(RING_CALL_MUTING_ENFORCEMENT_DELAY_MS); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| synchronized (mAudioFocusLock) { |
| // since the new thread starting running the state could have changed, so |
| // we need to check again mRingOrCallActive, not enteringRingOrCall |
| if (mRingOrCallActive) { |
| mFocusEnforcer.mutePlayersForCall(USAGES_TO_MUTE_IN_RING_OR_CALL); |
| } else { |
| mFocusEnforcer.unmutePlayersForCall(); |
| } |
| } |
| } |
| }.start(); |
| } |
| } |