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	Original line	Diff line number	Diff line
	@@ -66,6 +66,11 @@ public class MediaFocusControl implements OnFinished {
	/** Debug volumes */		/** Debug volumes */
	protected static final boolean DEBUG_VOL = false;		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. */		/** Used to alter media button redirection when the phone is ringing. */
	private boolean mIsRinging = false;		private boolean mIsRinging = false;

	@@ -267,15 +272,15 @@ public class MediaFocusControl implements OnFinished {
	synchronized(mAudioFocusLock) {		synchronized(mAudioFocusLock) {
	if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {		if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
	// notify the current focus owner it lost focus after removing it from stack		// notify the current focus owner it lost focus after removing it from stack
	FocusStackEntry focusOwner = mFocusStack.pop();		final FocusStackEntry exFocusOwner = mFocusStack.pop();
	try {		try {
	focusOwner.mFocusDispatcher.dispatchAudioFocusChange(		exFocusOwner.mFocusDispatcher.dispatchAudioFocusChange(
	AudioManager.AUDIOFOCUS_LOSS, focusOwner.mClientId);		AudioManager.AUDIOFOCUS_LOSS, exFocusOwner.mClientId);
	} catch (RemoteException e) {		} catch (RemoteException e) {
	Log.e(TAG, "Failure to signal loss of audio focus due to "+ e);		Log.e(TAG, "Failure to signal loss of audio focus due to "+ e);
	e.printStackTrace();		e.printStackTrace();
	}		}
	focusOwner.unlinkToDeath();		exFocusOwner.unlinkToDeath();
	// clear RCD		// clear RCD
	synchronized(mRCStack) {		synchronized(mRCStack) {
	clearRemoteControlDisplay_syncAfRcs();		clearRemoteControlDisplay_syncAfRcs();
	@@ -288,9 +293,11 @@ public class MediaFocusControl implements OnFinished {
	// notify the top of the stack it gained focus		// notify the top of the stack it gained focus
	if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {		if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
	if (canReassignAudioFocus()) {		if (canReassignAudioFocus()) {
			final FocusStackEntry newFocusOwner = mFocusStack.peek();
	try {		try {
	mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(		newFocusOwner.mFocusDispatcher.dispatchAudioFocusChange(
	AudioManager.AUDIOFOCUS_GAIN, mFocusStack.peek().mClientId);		AudioManager.AUDIOFOCUS_GAIN, mFocusStack.peek().mClientId);
			newFocusOwner.mFocusLossReceived = AUDIOFOCUS_NONE;
	} catch (RemoteException e) {		} catch (RemoteException e) {
	Log.e(TAG, "Failure to signal gain of audio control focus due to "+ e);		Log.e(TAG, "Failure to signal gain of audio control focus due to "+ e);
	e.printStackTrace();		e.printStackTrace();
	@@ -304,22 +311,53 @@ public class MediaFocusControl implements OnFinished {
	public IAudioFocusDispatcher mFocusDispatcher = null;		public IAudioFocusDispatcher mFocusDispatcher = null;
	public IBinder mSourceRef = null;		public IBinder mSourceRef = null;
	public String mClientId;		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 AudioFocusDeathHandler mHandler;
	public String mPackageName;		public String mPackageName;
	public int mCallingUid;		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,		IAudioFocusDispatcher afl, IBinder source, String id, AudioFocusDeathHandler hdlr,
	String pn, int uid) {		String pn, int uid) {
	mStreamType = streamType;		mStreamType = streamType;
	mFocusDispatcher = afl;		mFocusDispatcher = afl;
	mSourceRef = source;		mSourceRef = source;
	mClientId = id;		mClientId = id;
	mFocusChangeType = duration;		mFocusGainRequest = focusRequest;
			mFocusLossReceived = AUDIOFOCUS_NONE;
	mHandler = hdlr;		mHandler = hdlr;
	mPackageName = pn;		mPackageName = pn;
	mCallingUid = uid;		mCallingUid = uid;
	@@ -358,7 +396,8 @@ public class MediaFocusControl implements OnFinished {
	pw.println(" source:" + fse.mSourceRef		pw.println(" source:" + fse.mSourceRef
	+ " -- pack: " + fse.mPackageName		+ " -- pack: " + fse.mPackageName
	+ " -- client: " + fse.mClientId		+ " -- client: " + fse.mClientId
	+ " -- duration: " + fse.mFocusChangeType		+ " -- gain: " + fse.focusGainToString()
			+ " -- loss: " + fse.focusLossToString()
	+ " -- uid: " + fse.mCallingUid		+ " -- uid: " + fse.mCallingUid
	+ " -- stream: " + fse.mStreamType);		+ " -- stream: " + fse.mStreamType);
	}		}
	@@ -513,7 +552,7 @@ public class MediaFocusControl implements OnFinished {
	if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientId)) {		if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientId)) {
	// if focus is already owned by this client and the reason for acquiring the focus		// if focus is already owned by this client and the reason for acquiring the focus
	// hasn't changed, don't do anything		// 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.		// unlink death handler so it can be gc'ed.
	// linkToDeath() creates a JNI global reference preventing collection.		// linkToDeath() creates a JNI global reference preventing collection.
	cb.unlinkToDeath(afdh, 0);		cb.unlinkToDeath(afdh, 0);
	@@ -527,12 +566,14 @@ public class MediaFocusControl implements OnFinished {

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