| /* |
| * 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.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.app.AppOpsManager; |
| import android.content.ContentResolver; |
| 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.MediaMetrics; |
| import android.media.audiopolicy.IAudioPolicyCallback; |
| import android.os.Binder; |
| import android.os.Build; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.os.IBinder; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.provider.Settings; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.GuardedBy; |
| |
| import java.io.PrintWriter; |
| import java.text.DateFormat; |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| import java.util.Stack; |
| |
| /** |
| * @hide |
| * |
| */ |
| public class MediaFocusControl implements PlayerFocusEnforcer { |
| |
| private static final String TAG = "MediaFocusControl"; |
| static final boolean DEBUG = false; |
| |
| /** |
| * 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 to the framework enforces ducking itself only with apps above a given SDK |
| * target level. Is ignored if ENFORCE_DUCKING is false. |
| */ |
| static final boolean ENFORCE_DUCKING_FOR_NEW = true; |
| /** |
| * the SDK level (included) up to which the framework doesn't enforce ducking itself. Is ignored |
| * if ENFORCE_DUCKING_FOR_NEW is false; |
| */ |
| // automatic ducking was introduced for Android O |
| static final int DUCKING_IN_APP_SDK_LEVEL = Build.VERSION_CODES.N_MR1; |
| /** |
| * 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; |
| |
| /** |
| * set to true so the framework enforces fading out apps that lose audio focus in a |
| * non-transient way. |
| */ |
| static final boolean ENFORCE_FADEOUT_FOR_FOCUS_LOSS = true; |
| |
| private final Context mContext; |
| private final AppOpsManager mAppOps; |
| private PlayerFocusEnforcer mFocusEnforcer; // never null |
| private boolean mMultiAudioFocusEnabled = false; |
| |
| private boolean mRingOrCallActive = false; |
| |
| private final Object mExtFocusChangeLock = new Object(); |
| @GuardedBy("mExtFocusChangeLock") |
| private long mExtFocusChangeCounter; |
| |
| protected MediaFocusControl(Context cntxt, PlayerFocusEnforcer pfe) { |
| mContext = cntxt; |
| mAppOps = (AppOpsManager)mContext.getSystemService(Context.APP_OPS_SERVICE); |
| mFocusEnforcer = pfe; |
| final ContentResolver cr = mContext.getContentResolver(); |
| mMultiAudioFocusEnabled = Settings.System.getIntForUser(cr, |
| Settings.System.MULTI_AUDIO_FOCUS_ENABLED, 0, cr.getUserId()) != 0; |
| initFocusThreading(); |
| } |
| |
| protected void dump(PrintWriter pw) { |
| pw.println("\nMediaFocusControl dump time: " |
| + DateFormat.getTimeInstance().format(new Date())); |
| dumpFocusStack(pw); |
| pw.println("\n"); |
| // log |
| mEventLogger.dump(pw); |
| dumpMultiAudioFocus(pw); |
| } |
| |
| //================================================================= |
| // PlayerFocusEnforcer implementation |
| @Override |
| public boolean duckPlayers(@NonNull FocusRequester winner, @NonNull FocusRequester loser, |
| boolean forceDuck) { |
| return mFocusEnforcer.duckPlayers(winner, loser, forceDuck); |
| } |
| |
| @Override |
| public void restoreVShapedPlayers(@NonNull FocusRequester winner) { |
| mFocusEnforcer.restoreVShapedPlayers(winner); |
| } |
| |
| @Override |
| public void mutePlayersForCall(int[] usagesToMute) { |
| mFocusEnforcer.mutePlayersForCall(usagesToMute); |
| } |
| |
| @Override |
| public void unmutePlayersForCall() { |
| mFocusEnforcer.unmutePlayersForCall(); |
| } |
| |
| @Override |
| public boolean fadeOutPlayers(@NonNull FocusRequester winner, @NonNull FocusRequester loser) { |
| return mFocusEnforcer.fadeOutPlayers(winner, loser); |
| } |
| |
| @Override |
| public void forgetUid(int uid) { |
| mFocusEnforcer.forgetUid(uid); |
| } |
| |
| //========================================================================================== |
| // AudioFocus |
| //========================================================================================== |
| |
| private final static Object mAudioFocusLock = new Object(); |
| |
| /** |
| * Arbitrary maximum size of audio focus stack to prevent apps OOM'ing this process. |
| */ |
| private static final int MAX_STACK_SIZE = 100; |
| |
| private static final AudioEventLogger mEventLogger = new AudioEventLogger(50, |
| "focus commands as seen by MediaFocusControl"); |
| |
| private static final String mMetricsId = MediaMetrics.Name.AUDIO_FOCUS; |
| |
| /*package*/ void noFocusForSuspendedApp(@NonNull String packageName, int uid) { |
| synchronized (mAudioFocusLock) { |
| final Iterator<FocusRequester> stackIterator = mFocusStack.iterator(); |
| List<String> clientsToRemove = new ArrayList<>(); |
| while (stackIterator.hasNext()) { |
| final FocusRequester focusOwner = stackIterator.next(); |
| if (focusOwner.hasSameUid(uid) && focusOwner.hasSamePackage(packageName)) { |
| clientsToRemove.add(focusOwner.getClientId()); |
| mEventLogger.log((new AudioEventLogger.StringEvent( |
| "focus owner:" + focusOwner.getClientId() |
| + " in uid:" + uid + " pack: " + packageName |
| + " getting AUDIOFOCUS_LOSS due to app suspension")) |
| .printLog(TAG)); |
| // make the suspended app lose focus through its focus listener (if any) |
| focusOwner.dispatchFocusChange(AudioManager.AUDIOFOCUS_LOSS); |
| } |
| } |
| for (String clientToRemove : clientsToRemove) { |
| // update the stack but don't signal the change. |
| removeFocusStackEntry(clientToRemove, false, true); |
| } |
| } |
| } |
| |
| /*package*/ boolean hasAudioFocusUsers() { |
| synchronized (mAudioFocusLock) { |
| return !mFocusStack.empty(); |
| } |
| } |
| |
| /** |
| * 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, |
| false /*forceDuck*/); |
| exFocusOwner.release(); |
| } |
| } |
| } |
| |
| @GuardedBy("mAudioFocusLock") |
| private void notifyTopOfAudioFocusStack() { |
| // notify the top of the stack it gained focus |
| if (!mFocusStack.empty()) { |
| if (canReassignAudioFocus()) { |
| mFocusStack.peek().handleFocusGain(AudioManager.AUDIOFOCUS_GAIN); |
| } |
| } |
| |
| if (mMultiAudioFocusEnabled && !mMultiAudioFocusList.isEmpty()) { |
| for (FocusRequester multifr : mMultiAudioFocusList) { |
| if (isLockedFocusOwner(multifr)) { |
| multifr.handleFocusGain(AudioManager.AUDIOFOCUS_GAIN); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Focus is requested, propagate the associated loss throughout the stack. |
| * Will also remove entries in the stack that have just received a definitive loss of focus. |
| * @param focusGain the new focus gain that will later be added at the top of the stack |
| */ |
| @GuardedBy("mAudioFocusLock") |
| private void propagateFocusLossFromGain_syncAf(int focusGain, final FocusRequester fr, |
| boolean forceDuck) { |
| final List<String> clientsToRemove = new LinkedList<String>(); |
| // 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 |
| if (!mFocusStack.empty()) { |
| for (FocusRequester focusLoser : mFocusStack) { |
| final boolean isDefinitiveLoss = |
| focusLoser.handleFocusLossFromGain(focusGain, fr, forceDuck); |
| if (isDefinitiveLoss) { |
| clientsToRemove.add(focusLoser.getClientId()); |
| } |
| } |
| } |
| |
| if (mMultiAudioFocusEnabled && !mMultiAudioFocusList.isEmpty()) { |
| for (FocusRequester multifocusLoser : mMultiAudioFocusList) { |
| final boolean isDefinitiveLoss = |
| multifocusLoser.handleFocusLossFromGain(focusGain, fr, forceDuck); |
| if (isDefinitiveLoss) { |
| clientsToRemove.add(multifocusLoser.getClientId()); |
| } |
| } |
| } |
| |
| for (String clientToRemove : clientsToRemove) { |
| removeFocusStackEntry(clientToRemove, false /*signal*/, |
| true /*notifyFocusFollowers*/); |
| } |
| } |
| |
| private final Stack<FocusRequester> mFocusStack = new Stack<FocusRequester>(); |
| |
| ArrayList<FocusRequester> mMultiAudioFocusList = new ArrayList<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"); |
| if (mFocusPolicy == null) { |
| pw.println("No external focus policy\n"); |
| } else { |
| pw.println("External focus policy: "+ mFocusPolicy + ", focus owners:\n"); |
| dumpExtFocusPolicyFocusOwners(pw); |
| } |
| } |
| pw.println("\n"); |
| pw.println(" Notify on duck: " + mNotifyFocusOwnerOnDuck + "\n"); |
| pw.println(" In ring or call: " + mRingOrCallActive + "\n"); |
| } |
| |
| /** |
| * 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. |
| */ |
| @GuardedBy("mAudioFocusLock") |
| private void removeFocusStackEntry(String clientToRemove, boolean signal, |
| boolean notifyFocusFollowers) { |
| AudioFocusInfo abandonSource = null; |
| // 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.maybeRelease(); |
| if (notifyFocusFollowers) { |
| abandonSource = fr.toAudioFocusInfo(); |
| } |
| 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(); |
| if (notifyFocusFollowers) { |
| abandonSource = fr.toAudioFocusInfo(); |
| } |
| // stack entry not used anymore, clear references |
| fr.maybeRelease(); |
| } |
| } |
| } |
| // focus followers still want to know focus was abandoned, handled as a loss |
| if (abandonSource != null) { |
| abandonSource.clearLossReceived(); |
| notifyExtPolicyFocusLoss_syncAf(abandonSource, false); |
| } |
| |
| if (mMultiAudioFocusEnabled && !mMultiAudioFocusList.isEmpty()) { |
| Iterator<FocusRequester> listIterator = mMultiAudioFocusList.iterator(); |
| while (listIterator.hasNext()) { |
| FocusRequester fr = listIterator.next(); |
| if (fr.hasSameClient(clientToRemove)) { |
| listIterator.remove(); |
| fr.release(); |
| } |
| } |
| |
| if (signal) { |
| // notify the new top of the stack it gained focus |
| notifyTopOfAudioFocusStack(); |
| } |
| } |
| } |
| |
| /** |
| * Remove focus listeners from the focus stack for a particular client when it has died. |
| */ |
| @GuardedBy("mAudioFocusLock") |
| 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); |
| mEventLogger.log(new AudioEventLogger.StringEvent( |
| "focus requester:" + fr.getClientId() |
| + " in uid:" + fr.getClientUid() |
| + " pack:" + fr.getPackageName() |
| + " died")); |
| notifyExtPolicyFocusLoss_syncAf(fr.toAudioFocusInfo(), false); |
| |
| 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 for external focus policy: |
| * Remove focus listeners from the list of potential focus owners for a particular client when |
| * it has died. |
| */ |
| @GuardedBy("mAudioFocusLock") |
| private void removeFocusEntryForExtPolicyOnDeath(IBinder cb) { |
| if (mFocusOwnersForFocusPolicy.isEmpty()) { |
| return; |
| } |
| boolean released = false; |
| final Set<Entry<String, FocusRequester>> owners = mFocusOwnersForFocusPolicy.entrySet(); |
| final Iterator<Entry<String, FocusRequester>> ownerIterator = owners.iterator(); |
| while (ownerIterator.hasNext()) { |
| final Entry<String, FocusRequester> owner = ownerIterator.next(); |
| final FocusRequester fr = owner.getValue(); |
| if (fr.hasSameBinder(cb)) { |
| ownerIterator.remove(); |
| mEventLogger.log(new AudioEventLogger.StringEvent( |
| "focus requester:" + fr.getClientId() |
| + " in uid:" + fr.getClientUid() |
| + " pack:" + fr.getPackageName() |
| + " died")); |
| fr.release(); |
| notifyExtFocusPolicyFocusAbandon_syncAf(fr.toAudioFocusInfo()); |
| break; |
| } |
| } |
| } |
| |
| /** |
| * 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} |
| */ |
| @GuardedBy("mAudioFocusLock") |
| 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, false /*forceDuck*/); |
| 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) { |
| if (mFocusPolicy != null) { |
| removeFocusEntryForExtPolicyOnDeath(mCb); |
| } else { |
| removeFocusStackEntryOnDeath(mCb); |
| if (mMultiAudioFocusEnabled && !mMultiAudioFocusList.isEmpty()) { |
| Iterator<FocusRequester> listIterator = mMultiAudioFocusList.iterator(); |
| while (listIterator.hasNext()) { |
| FocusRequester fr = listIterator.next(); |
| if (fr.hasSameBinder(mCb)) { |
| listIterator.remove(); |
| fr.release(); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * 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; |
| } |
| } |
| } |
| } |
| |
| /** The current audio focus policy */ |
| @GuardedBy("mAudioFocusLock") |
| @Nullable private IAudioPolicyCallback mFocusPolicy = null; |
| /** |
| * The audio focus policy that was registered before a test focus policy was registered |
| * during a test |
| */ |
| @GuardedBy("mAudioFocusLock") |
| @Nullable private IAudioPolicyCallback mPreviousFocusPolicy = null; |
| |
| // Since we don't have a stack of focus owners when using an external focus policy, we keep |
| // track of all the focus requesters in this map, with their clientId as the key. This is |
| // used both for focus dispatch and death handling |
| private HashMap<String, FocusRequester> mFocusOwnersForFocusPolicy = |
| new HashMap<String, FocusRequester>(); |
| |
| void setFocusPolicy(IAudioPolicyCallback policy, boolean isTestFocusPolicy) { |
| if (policy == null) { |
| return; |
| } |
| synchronized (mAudioFocusLock) { |
| if (isTestFocusPolicy) { |
| mPreviousFocusPolicy = mFocusPolicy; |
| } |
| mFocusPolicy = policy; |
| } |
| } |
| |
| void unsetFocusPolicy(IAudioPolicyCallback policy, boolean isTestFocusPolicy) { |
| if (policy == null) { |
| return; |
| } |
| synchronized (mAudioFocusLock) { |
| if (mFocusPolicy == policy) { |
| if (isTestFocusPolicy) { |
| // restore the focus policy that was there before the focus policy test started |
| mFocusPolicy = mPreviousFocusPolicy; |
| } else { |
| mFocusPolicy = null; |
| } |
| } |
| } |
| } |
| |
| /** |
| * @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); |
| } |
| } |
| } |
| |
| /** |
| * Called synchronized on mAudioFocusLock. |
| * Can only be called with an external focus policy installed (mFocusPolicy != null) |
| * @param afi |
| * @param fd |
| * @param cb binder of the focus requester |
| * @return true if the external audio focus policy (if any) can handle the focus request, |
| * and false if there was any error handling the request (e.g. error talking to policy, |
| * focus requester is already dead) |
| */ |
| boolean notifyExtFocusPolicyFocusRequest_syncAf(AudioFocusInfo afi, |
| IAudioFocusDispatcher fd, @NonNull IBinder cb) { |
| if (DEBUG) { |
| Log.v(TAG, "notifyExtFocusPolicyFocusRequest client="+afi.getClientId() |
| + " dispatcher=" + fd); |
| } |
| synchronized (mExtFocusChangeLock) { |
| afi.setGen(mExtFocusChangeCounter++); |
| } |
| final FocusRequester existingFr = mFocusOwnersForFocusPolicy.get(afi.getClientId()); |
| boolean keepTrack = false; |
| if (existingFr != null) { |
| if (!existingFr.hasSameDispatcher(fd)) { |
| existingFr.release(); |
| keepTrack = true; |
| } |
| } else { |
| keepTrack = true; |
| } |
| if (keepTrack) { |
| final AudioFocusDeathHandler hdlr = new AudioFocusDeathHandler(cb); |
| try { |
| cb.linkToDeath(hdlr, 0); |
| } catch (RemoteException e) { |
| // client has already died! |
| return false; |
| } |
| // new focus (future) focus owner to keep track of |
| mFocusOwnersForFocusPolicy.put(afi.getClientId(), |
| new FocusRequester(afi, fd, cb, hdlr, this)); |
| } |
| |
| try { |
| //oneway |
| mFocusPolicy.notifyAudioFocusRequest(afi, AudioManager.AUDIOFOCUS_REQUEST_GRANTED); |
| return true; |
| } catch (RemoteException e) { |
| Log.e(TAG, "Can't call notifyAudioFocusRequest() on IAudioPolicyCallback " |
| + mFocusPolicy.asBinder(), e); |
| } |
| return false; |
| } |
| |
| void setFocusRequestResultFromExtPolicy(AudioFocusInfo afi, int requestResult) { |
| synchronized (mExtFocusChangeLock) { |
| if (afi.getGen() > mExtFocusChangeCounter) { |
| return; |
| } |
| } |
| final FocusRequester fr; |
| if (requestResult == AudioManager.AUDIOFOCUS_REQUEST_FAILED) { |
| fr = mFocusOwnersForFocusPolicy.remove(afi.getClientId()); |
| } else { |
| fr = mFocusOwnersForFocusPolicy.get(afi.getClientId()); |
| } |
| if (fr != null) { |
| fr.dispatchFocusResultFromExtPolicy(requestResult); |
| } |
| } |
| |
| /** |
| * Called synchronized on mAudioFocusLock |
| * @param afi |
| * @return true if the external audio focus policy (if any) is handling the focus request |
| */ |
| boolean notifyExtFocusPolicyFocusAbandon_syncAf(AudioFocusInfo afi) { |
| if (mFocusPolicy == null) { |
| return false; |
| } |
| final FocusRequester fr = mFocusOwnersForFocusPolicy.remove(afi.getClientId()); |
| if (fr != null) { |
| fr.release(); |
| } |
| try { |
| //oneway |
| mFocusPolicy.notifyAudioFocusAbandon(afi); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Can't call notifyAudioFocusAbandon() on IAudioPolicyCallback " |
| + mFocusPolicy.asBinder(), e); |
| } |
| return true; |
| } |
| |
| /** see AudioManager.dispatchFocusChange(AudioFocusInfo afi, int focusChange, AudioPolicy ap) */ |
| int dispatchFocusChange(AudioFocusInfo afi, int focusChange) { |
| if (DEBUG) { |
| Log.v(TAG, "dispatchFocusChange " + focusChange + " to afi client=" |
| + afi.getClientId()); |
| } |
| synchronized (mAudioFocusLock) { |
| if (mFocusPolicy == null) { |
| if (DEBUG) { Log.v(TAG, "> failed: no focus policy" ); } |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } |
| final FocusRequester fr; |
| if (focusChange == AudioManager.AUDIOFOCUS_LOSS) { |
| fr = mFocusOwnersForFocusPolicy.remove(afi.getClientId()); |
| } else { |
| fr = mFocusOwnersForFocusPolicy.get(afi.getClientId()); |
| } |
| if (fr == null) { |
| if (DEBUG) { Log.v(TAG, "> failed: no such focus requester known" ); } |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } |
| return fr.dispatchFocusChange(focusChange); |
| } |
| } |
| |
| private void dumpExtFocusPolicyFocusOwners(PrintWriter pw) { |
| final Set<Entry<String, FocusRequester>> owners = mFocusOwnersForFocusPolicy.entrySet(); |
| final Iterator<Entry<String, FocusRequester>> ownerIterator = owners.iterator(); |
| while (ownerIterator.hasNext()) { |
| final Entry<String, FocusRequester> owner = ownerIterator.next(); |
| final FocusRequester fr = owner.getValue(); |
| fr.dump(pw); |
| } |
| } |
| |
| 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: |
| case AudioAttributes.USAGE_ANNOUNCEMENT: |
| 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: |
| case AudioAttributes.USAGE_VEHICLE_STATUS: |
| return 500; |
| case AudioAttributes.USAGE_EMERGENCY: |
| case AudioAttributes.USAGE_SAFETY: |
| case AudioAttributes.USAGE_UNKNOWN: |
| default: |
| return 0; |
| } |
| } |
| |
| /** @see AudioManager#requestAudioFocus(AudioManager.OnAudioFocusChangeListener, int, int, int) |
| * @param aa |
| * @param focusChangeHint |
| * @param cb |
| * @param fd |
| * @param clientId |
| * @param callingPackageName |
| * @param flags |
| * @param sdk |
| * @param forceDuck only true if |
| * {@link android.media.AudioFocusRequest.Builder#setFocusGain(int)} was set to true for |
| * accessibility. |
| * @param testUid ignored if flags is not AudioManager.AUDIOFOCUS_FLAG_TEST (strictly equals to) |
| * otherwise the UID being injected for testing |
| * @return |
| */ |
| protected int requestAudioFocus(@NonNull AudioAttributes aa, int focusChangeHint, IBinder cb, |
| IAudioFocusDispatcher fd, @NonNull String clientId, @NonNull String callingPackageName, |
| int flags, int sdk, boolean forceDuck, int testUid) { |
| new MediaMetrics.Item(mMetricsId) |
| .setUid(Binder.getCallingUid()) |
| .set(MediaMetrics.Property.CALLING_PACKAGE, callingPackageName) |
| .set(MediaMetrics.Property.CLIENT_NAME, clientId) |
| .set(MediaMetrics.Property.EVENT, "requestAudioFocus") |
| .set(MediaMetrics.Property.FLAGS, flags) |
| .set(MediaMetrics.Property.FOCUS_CHANGE_HINT, |
| AudioManager.audioFocusToString(focusChangeHint)) |
| //.set(MediaMetrics.Property.SDK, sdk) |
| .record(); |
| |
| // when using the test API, a fake UID can be injected (testUid is ignored otherwise) |
| // note that the test on flags is not a mask test on purpose, AUDIOFOCUS_FLAG_TEST is |
| // supposed to be alone in bitfield |
| final int uid = (flags == AudioManager.AUDIOFOCUS_FLAG_TEST) |
| ? testUid : Binder.getCallingUid(); |
| mEventLogger.log((new AudioEventLogger.StringEvent( |
| "requestAudioFocus() from uid/pid " + uid |
| + "/" + Binder.getCallingPid() |
| + " AA=" + aa.usageToString() + "/" + aa.contentTypeToString() |
| + " clientId=" + clientId + " callingPack=" + callingPackageName |
| + " req=" + focusChangeHint |
| + " flags=0x" + Integer.toHexString(flags) |
| + " sdk=" + sdk)) |
| .printLog(TAG)); |
| // 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 ((flags != AudioManager.AUDIOFOCUS_FLAG_TEST) |
| // note we're using the real uid for appOp evaluation |
| && (mAppOps.noteOp(AppOpsManager.OP_TAKE_AUDIO_FOCUS, Binder.getCallingUid(), |
| callingPackageName) != AppOpsManager.MODE_ALLOWED)) { |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } |
| |
| synchronized(mAudioFocusLock) { |
| if (mFocusStack.size() > MAX_STACK_SIZE) { |
| Log.e(TAG, "Max AudioFocus stack size reached, failing requestAudioFocus()"); |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } |
| |
| boolean enteringRingOrCall = !mRingOrCallActive |
| & (AudioSystem.IN_VOICE_COMM_FOCUS_ID.compareTo(clientId) == 0); |
| if (enteringRingOrCall) { mRingOrCallActive = true; } |
| |
| final AudioFocusInfo afiForExtPolicy; |
| if (mFocusPolicy != null) { |
| // construct AudioFocusInfo as it will be communicated to audio focus policy |
| afiForExtPolicy = new AudioFocusInfo(aa, uid, |
| clientId, callingPackageName, focusChangeHint, 0 /*lossReceived*/, |
| flags, sdk); |
| } else { |
| afiForExtPolicy = null; |
| } |
| |
| // handle delayed focus |
| 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; |
| } |
| } |
| |
| // external focus policy? |
| if (mFocusPolicy != null) { |
| if (notifyExtFocusPolicyFocusRequest_syncAf(afiForExtPolicy, fd, cb)) { |
| // stop handling focus request here as it is handled by external audio |
| // focus policy (return code will be handled in AudioManager) |
| return AudioManager.AUDIOFOCUS_REQUEST_WAITING_FOR_EXT_POLICY; |
| } else { |
| // an error occured, client already dead, bail early |
| return AudioManager.AUDIOFOCUS_REQUEST_FAILED; |
| } |
| } |
| |
| // 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, uid, this, sdk); |
| |
| if (mMultiAudioFocusEnabled |
| && (focusChangeHint == AudioManager.AUDIOFOCUS_GAIN)) { |
| if (enteringRingOrCall) { |
| if (!mMultiAudioFocusList.isEmpty()) { |
| for (FocusRequester multifr : mMultiAudioFocusList) { |
| multifr.handleFocusLossFromGain(focusChangeHint, nfr, forceDuck); |
| } |
| } |
| } else { |
| boolean needAdd = true; |
| if (!mMultiAudioFocusList.isEmpty()) { |
| for (FocusRequester multifr : mMultiAudioFocusList) { |
| if (multifr.getClientUid() == Binder.getCallingUid()) { |
| needAdd = false; |
| break; |
| } |
| } |
| } |
| if (needAdd) { |
| mMultiAudioFocusList.add(nfr); |
| } |
| nfr.handleFocusGainFromRequest(AudioManager.AUDIOFOCUS_REQUEST_GRANTED); |
| notifyExtPolicyFocusGrant_syncAf(nfr.toAudioFocusInfo(), |
| AudioManager.AUDIOFOCUS_REQUEST_GRANTED); |
| return AudioManager.AUDIOFOCUS_REQUEST_GRANTED; |
| } |
| } |
| |
| 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 |
| propagateFocusLossFromGain_syncAf(focusChangeHint, nfr, forceDuck); |
| |
| // push focus requester at the top of the audio focus stack |
| mFocusStack.push(nfr); |
| nfr.handleFocusGainFromRequest(AudioManager.AUDIOFOCUS_REQUEST_GRANTED); |
| } |
| 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, |
| String callingPackageName) { |
| new MediaMetrics.Item(mMetricsId) |
| .setUid(Binder.getCallingUid()) |
| .set(MediaMetrics.Property.CALLING_PACKAGE, callingPackageName) |
| .set(MediaMetrics.Property.CLIENT_NAME, clientId) |
| .set(MediaMetrics.Property.EVENT, "abandonAudioFocus") |
| .record(); |
| |
| // AudioAttributes are currently ignored, to be used for zones / a11y |
| mEventLogger.log((new AudioEventLogger.StringEvent( |
| "abandonAudioFocus() from uid/pid " + Binder.getCallingUid() |
| + "/" + Binder.getCallingPid() |
| + " clientId=" + clientId)) |
| .printLog(TAG)); |
| try { |
| // this will take care of notifying the new focus owner if needed |
| synchronized(mAudioFocusLock) { |
| // external focus policy? |
| if (mFocusPolicy != null) { |
| final AudioFocusInfo afi = new AudioFocusInfo(aa, Binder.getCallingUid(), |
| clientId, callingPackageName, 0 /*gainRequest*/, 0 /*lossReceived*/, |
| 0 /*flags*/, 0 /* sdk n/a here*/); |
| if (notifyExtFocusPolicyFocusAbandon_syncAf(afi)) { |
| return AudioManager.AUDIOFOCUS_REQUEST_GRANTED; |
| } |
| } |
| |
| 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(); |
| } |
| |
| public void updateMultiAudioFocus(boolean enabled) { |
| Log.d(TAG, "updateMultiAudioFocus( " + enabled + " )"); |
| mMultiAudioFocusEnabled = enabled; |
| final ContentResolver cr = mContext.getContentResolver(); |
| Settings.System.putIntForUser(cr, |
| Settings.System.MULTI_AUDIO_FOCUS_ENABLED, enabled ? 1 : 0, cr.getUserId()); |
| if (!mFocusStack.isEmpty()) { |
| final FocusRequester fr = mFocusStack.peek(); |
| fr.handleFocusLoss(AudioManager.AUDIOFOCUS_LOSS, null, false); |
| } |
| if (!enabled) { |
| if (!mMultiAudioFocusList.isEmpty()) { |
| for (FocusRequester multifr : mMultiAudioFocusList) { |
| multifr.handleFocusLoss(AudioManager.AUDIOFOCUS_LOSS, null, false); |
| } |
| mMultiAudioFocusList.clear(); |
| } |
| } |
| } |
| |
| public boolean getMultiAudioFocusEnabled() { |
| return mMultiAudioFocusEnabled; |
| } |
| |
| /*package*/ long getFadeOutDurationOnFocusLossMillis(AudioAttributes aa) { |
| if (!ENFORCE_FADEOUT_FOR_FOCUS_LOSS) { |
| return 0; |
| } |
| return FadeOutManager.getFadeOutDurationOnFocusLossMillis(aa); |
| } |
| |
| private void dumpMultiAudioFocus(PrintWriter pw) { |
| pw.println("Multi Audio Focus enabled :" + mMultiAudioFocusEnabled); |
| if (!mMultiAudioFocusList.isEmpty()) { |
| pw.println("Multi Audio Focus List:"); |
| pw.println("------------------------------"); |
| for (FocusRequester multifr : mMultiAudioFocusList) { |
| multifr.dump(pw); |
| } |
| pw.println("------------------------------"); |
| } |
| } |
| |
| //================================================================= |
| // Async focus events |
| void postDelayedLossAfterFade(FocusRequester focusLoser, long delayMs) { |
| if (DEBUG) { |
| Log.v(TAG, "postDelayedLossAfterFade loser=" + focusLoser.getPackageName()); |
| } |
| mFocusHandler.sendMessageDelayed( |
| mFocusHandler.obtainMessage(MSG_L_FOCUS_LOSS_AFTER_FADE, focusLoser), |
| FadeOutManager.FADE_OUT_DURATION_MS); |
| } |
| //================================================================= |
| // Message handling |
| private Handler mFocusHandler; |
| private HandlerThread mFocusThread; |
| |
| /** |
| * dispatch a focus loss after an app has been faded out. Focus loser is to be released |
| * after dispatch as it has already left the stack |
| * args: |
| * msg.obj: the audio focus loser |
| * type:FocusRequester |
| */ |
| private static final int MSG_L_FOCUS_LOSS_AFTER_FADE = 1; |
| |
| private void initFocusThreading() { |
| mFocusThread = new HandlerThread(TAG); |
| mFocusThread.start(); |
| mFocusHandler = new Handler(mFocusThread.getLooper()) { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_L_FOCUS_LOSS_AFTER_FADE: |
| if (DEBUG) { |
| Log.d(TAG, "MSG_L_FOCUS_LOSS_AFTER_FADE loser=" |
| + ((FocusRequester) msg.obj).getPackageName()); |
| } |
| synchronized (mAudioFocusLock) { |
| final FocusRequester loser = (FocusRequester) msg.obj; |
| if (loser.isInFocusLossLimbo()) { |
| loser.dispatchFocusChange(AudioManager.AUDIOFOCUS_LOSS); |
| loser.release(); |
| mFocusEnforcer.forgetUid(loser.getClientUid()); |
| } |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| }; |
| |
| } |
| } |
