Audio Injection respect Enterprise Policy (f45b4796) · Commits · e / os / android_frameworks_base

core/java/android/companion/virtual/audio/AudioInjection.java

+10 −3

Original line number	Diff line number	Diff line
		@@ -43,13 +43,20 @@ public final class AudioInjection {
		private static final String TAG = "AudioInjection";

		private final Object mLock = new Object();

		@GuardedBy("mLock")
		@Nullable
		private AudioTrack mAudioTrack;

		@GuardedBy("mLock")
		private int mPlayState = PLAYSTATE_STOPPED;
		@GuardedBy("mLock")
		private boolean mIsSilent;

		/** Sets if the injected microphone sound is silent. */
		void setSilent(boolean isSilent) {
		synchronized (mLock) {
		mIsSilent = isSilent;
		}
		}

		/**
		* Sets the {@link AudioTrack} to handle audio injection.
		@@ -86,7 +93,7 @@ public final class AudioInjection {
		public int write(@NonNull ByteBuffer audioBuffer, int sizeInBytes, int writeMode) {
		final int sizeWrite;
		synchronized (mLock) {
		if (mAudioTrack != null) {
		if (mAudioTrack != null && !mIsSilent) {
		sizeWrite = mAudioTrack.write(audioBuffer, sizeInBytes, writeMode);
		} else {
		sizeWrite = 0;

core/java/android/companion/virtual/audio/UserRestrictionsDetector.java

0 → 100644

+96 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2022 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 android.companion.virtual.audio;

		import android.annotation.NonNull;
		import android.content.BroadcastReceiver;
		import android.content.Context;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.os.Bundle;
		import android.os.UserManager;

		import com.android.internal.annotations.GuardedBy;

		/**
		* Class to detect the user restrictions change for microphone usage.
		*/
		final class UserRestrictionsDetector extends BroadcastReceiver {
		private static final String TAG = "UserRestrictionsDetector";

		/** Interface for listening user restrictions change. */
		interface UserRestrictionsCallback {

		/** Notifies when value of {@link UserManager#DISALLOW_UNMUTE_MICROPHONE} is changed. */
		void onMicrophoneRestrictionChanged(boolean isUnmuteMicDisallowed);
		}

		private final Context mContext;
		private final UserManager mUserManager;
		private final Object mLock = new Object();
		@GuardedBy("mLock")
		private boolean mIsUnmuteMicDisallowed;
		private UserRestrictionsCallback mUserRestrictionsCallback;

		UserRestrictionsDetector(Context context) {
		mContext = context;
		mUserManager = context.getSystemService(UserManager.class);
		}

		/** Returns value of {@link UserManager#DISALLOW_UNMUTE_MICROPHONE}. */
		boolean isUnmuteMicrophoneDisallowed() {
		Bundle bundle = mUserManager.getUserRestrictions();
		return bundle.getBoolean(UserManager.DISALLOW_UNMUTE_MICROPHONE);
		}

		/** Registers user restrictions change. */
		void register(@NonNull UserRestrictionsCallback callback) {
		mUserRestrictionsCallback = callback;

		IntentFilter filter = new IntentFilter();
		filter.addAction(UserManager.ACTION_USER_RESTRICTIONS_CHANGED);
		mContext.registerReceiver(/* receiver= */ this, filter);

		synchronized (mLock) {
		// Gets initial value.
		mIsUnmuteMicDisallowed = isUnmuteMicrophoneDisallowed();
		}
		}

		/** Unregisters user restrictions change. */
		void unregister() {
		mUserRestrictionsCallback = null;
		mContext.unregisterReceiver(/* receiver= */ this);
		}

		@Override
		public void onReceive(Context context, Intent intent) {
		final String action = intent.getAction();
		if (UserManager.ACTION_USER_RESTRICTIONS_CHANGED.equals(action)) {
		boolean isUnmuteMicDisallowed = isUnmuteMicrophoneDisallowed();
		synchronized (mLock) {
		if (isUnmuteMicDisallowed == mIsUnmuteMicDisallowed) {
		return;
		}
		mIsUnmuteMicDisallowed = isUnmuteMicDisallowed;
		}
		if (mUserRestrictionsCallback != null) {
		mUserRestrictionsCallback.onMicrophoneRestrictionChanged(isUnmuteMicDisallowed);
		}
		}
		}
		}

core/java/android/companion/virtual/audio/VirtualAudioSession.java

+16 −2

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ package android.companion.virtual.audio;
		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.annotation.RequiresPermission;
		import android.companion.virtual.audio.UserRestrictionsDetector.UserRestrictionsCallback;
		import android.companion.virtual.audio.VirtualAudioDevice.AudioConfigurationChangeCallback;
		import android.content.Context;
		import android.media.AudioFormat;
		@@ -50,10 +51,11 @@ import java.util.concurrent.Executor;
		*/
		@VisibleForTesting
		public final class VirtualAudioSession extends IAudioSessionCallback.Stub implements
		Closeable {
		UserRestrictionsCallback, Closeable {
		private static final String TAG = "VirtualAudioSession";

		private final Context mContext;
		private final UserRestrictionsDetector mUserRestrictionsDetector;
		/** The {@link Executor} for sending {@link AudioConfigurationChangeCallback} to the caller */
		private final Executor mExecutor;
		@Nullable
		@@ -81,6 +83,7 @@ public final class VirtualAudioSession extends IAudioSessionCallback.Stub implem
		public VirtualAudioSession(Context context,
		@Nullable AudioConfigurationChangeCallback callback, @Nullable Executor executor) {
		mContext = context;
		mUserRestrictionsDetector = new UserRestrictionsDetector(context);
		mCallback = callback;
		mExecutor = executor != null ? executor : context.getMainExecutor();
		}
		@@ -117,7 +120,7 @@ public final class VirtualAudioSession extends IAudioSessionCallback.Stub implem
		@NonNull
		public AudioInjection startAudioInjection(@NonNull AudioFormat injectionFormat) {
		Objects.requireNonNull(injectionFormat, "injectionFormat must not be null");

		mUserRestrictionsDetector.register(/* callback= */ this);
		synchronized (mLock) {
		if (mAudioInjection != null) {
		throw new IllegalStateException(
		@@ -127,6 +130,7 @@ public final class VirtualAudioSession extends IAudioSessionCallback.Stub implem
		mInjectionFormat = injectionFormat;
		mAudioInjection = new AudioInjection();
		mAudioInjection.play();
		mAudioInjection.setSilent(mUserRestrictionsDetector.isUnmuteMicrophoneDisallowed());
		return mAudioInjection;
		}
		}
		@@ -170,6 +174,7 @@ public final class VirtualAudioSession extends IAudioSessionCallback.Stub implem
		@RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
		@Override
		public void close() {
		mUserRestrictionsDetector.unregister();
		releaseAudioStreams();
		synchronized (mLock) {
		mAudioCapture = null;
		@@ -179,6 +184,15 @@ public final class VirtualAudioSession extends IAudioSessionCallback.Stub implem
		}
		}

		@Override
		public void onMicrophoneRestrictionChanged(boolean isUnmuteMicDisallowed) {
		synchronized (mLock) {
		if (mAudioInjection != null) {
		mAudioInjection.setSilent(isUnmuteMicDisallowed);
		}
		}
		}

		@RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
		private void createAudioStreams(int[] appUids) {
		synchronized (mLock) {