More info in audio focus stack entry (caa2c5bb) · Commits · e / os / android_frameworks_base

media/java/android/media/MediaFocusControl.java

+55 −14

Original line number	Diff line number	Diff line
		@@ -66,6 +66,11 @@ public class MediaFocusControl implements OnFinished {
		/** Debug volumes */
		protected static final boolean DEBUG_VOL = false;

		/**
		* Used to indicate no audio focus has been gained or lost.
		*/
		private static final int AUDIOFOCUS_NONE = 0;

		/** Used to alter media button redirection when the phone is ringing. */
		private boolean mIsRinging = false;

		@@ -267,15 +272,15 @@ public class MediaFocusControl implements OnFinished {
		synchronized(mAudioFocusLock) {
		if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
		// notify the current focus owner it lost focus after removing it from stack
		FocusStackEntry focusOwner = mFocusStack.pop();
		final FocusStackEntry exFocusOwner = mFocusStack.pop();
		try {
		focusOwner.mFocusDispatcher.dispatchAudioFocusChange(
		AudioManager.AUDIOFOCUS_LOSS, focusOwner.mClientId);
		exFocusOwner.mFocusDispatcher.dispatchAudioFocusChange(
		AudioManager.AUDIOFOCUS_LOSS, exFocusOwner.mClientId);
		} catch (RemoteException e) {
		Log.e(TAG, "Failure to signal loss of audio focus due to "+ e);
		e.printStackTrace();
		}
		focusOwner.unlinkToDeath();
		exFocusOwner.unlinkToDeath();
		// clear RCD
		synchronized(mRCStack) {
		clearRemoteControlDisplay_syncAfRcs();
		@@ -288,9 +293,11 @@ public class MediaFocusControl implements OnFinished {
		// notify the top of the stack it gained focus
		if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
		if (canReassignAudioFocus()) {
		final FocusStackEntry newFocusOwner = mFocusStack.peek();
		try {
		mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(
		newFocusOwner.mFocusDispatcher.dispatchAudioFocusChange(
		AudioManager.AUDIOFOCUS_GAIN, mFocusStack.peek().mClientId);
		newFocusOwner.mFocusLossReceived = AUDIOFOCUS_NONE;
		} catch (RemoteException e) {
		Log.e(TAG, "Failure to signal gain of audio control focus due to "+ e);
		e.printStackTrace();
		@@ -304,22 +311,53 @@ public class MediaFocusControl implements OnFinished {
		public IAudioFocusDispatcher mFocusDispatcher = null;
		public IBinder mSourceRef = null;
		public String mClientId;
		public int mFocusChangeType;
		/** the audio focus gain request that caused the addition of this entry in the stack */
		public int mFocusGainRequest;
		public int mFocusLossReceived;
		public AudioFocusDeathHandler mHandler;
		public String mPackageName;
		public int mCallingUid;

		public FocusStackEntry() {
		private static String focusChangeToString(int focus) {
		switch(focus) {
		case AudioManager.AUDIOFOCUS_GAIN:
		return "GAIN";
		case AudioManager.AUDIOFOCUS_GAIN_TRANSIENT:
		return "GAIN_TRANSIENT";
		case AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK:
		return "GAIN_TRANSIENT_MAY_DUCK";
		case AudioManager.AUDIOFOCUS_LOSS:
		return "LOSS";
		case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
		return "LOSS_TRANSIENT";
		case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
		return "LOSS_TRANSIENT_CAN_DUCK";
		default:
		return "[invalid focus change" + focus + "]";
		}
		}

		String focusGainToString() {
		return focusChangeToString(mFocusGainRequest);
		}

		String focusLossToString() {
		if (mFocusLossReceived == 0) {
		return "none";
		} else {
		return focusChangeToString(mFocusLossReceived);
		}
		}

		public FocusStackEntry(int streamType, int duration,
		FocusStackEntry(int streamType, int focusRequest,
		IAudioFocusDispatcher afl, IBinder source, String id, AudioFocusDeathHandler hdlr,
		String pn, int uid) {
		mStreamType = streamType;
		mFocusDispatcher = afl;
		mSourceRef = source;
		mClientId = id;
		mFocusChangeType = duration;
		mFocusGainRequest = focusRequest;
		mFocusLossReceived = AUDIOFOCUS_NONE;
		mHandler = hdlr;
		mPackageName = pn;
		mCallingUid = uid;
		@@ -358,7 +396,8 @@ public class MediaFocusControl implements OnFinished {
		pw.println(" source:" + fse.mSourceRef
		+ " -- pack: " + fse.mPackageName
		+ " -- client: " + fse.mClientId
		+ " -- duration: " + fse.mFocusChangeType
		+ " -- gain: " + fse.focusGainToString()
		+ " -- loss: " + fse.focusLossToString()
		+ " -- uid: " + fse.mCallingUid
		+ " -- stream: " + fse.mStreamType);
		}
		@@ -513,7 +552,7 @@ public class MediaFocusControl implements OnFinished {
		if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientId)) {
		// if focus is already owned by this client and the reason for acquiring the focus
		// hasn't changed, don't do anything
		if (mFocusStack.peek().mFocusChangeType == focusChangeHint) {
		if (mFocusStack.peek().mFocusGainRequest == focusChangeHint) {
		// unlink death handler so it can be gc'ed.
		// linkToDeath() creates a JNI global reference preventing collection.
		cb.unlinkToDeath(afdh, 0);
		@@ -527,12 +566,14 @@ public class MediaFocusControl implements OnFinished {

		// notify current top of stack it is losing focus
		if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
		final FocusStackEntry exFocusOwner = mFocusStack.peek();
		try {
		mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(
		exFocusOwner.mFocusDispatcher.dispatchAudioFocusChange(
		-1 * focusChangeHint, // loss and gain codes are inverse of each other
		mFocusStack.peek().mClientId);
		exFocusOwner.mFocusLossReceived = -1 * focusChangeHint;
		} catch (RemoteException e) {
		Log.e(TAG, " Failure to signal loss of focus due to "+ e);
		Log.e(TAG, " Failure to signal loss of focus: ", e);
		e.printStackTrace();
		}
		}
		@@ -1557,7 +1598,7 @@ public class MediaFocusControl implements OnFinished {
		for (int index = mFocusStack.size()-1; index >= 0; index--) {
		FocusStackEntry fse = mFocusStack.elementAt(index);
		if ((fse.mStreamType == AudioManager.STREAM_MUSIC)
		\|\| (fse.mFocusChangeType == AudioManager.AUDIOFOCUS_GAIN)) {
		\|\| (fse.mFocusGainRequest == AudioManager.AUDIOFOCUS_GAIN)) {
		af = fse;
		break;
		}