Add VQDS service base files

    field public static final int INITIALIZATION_STATUS_UNKNOWN = 100; // 0x64

  }

  public abstract class VisualQueryDetectionService extends android.app.Service implements android.service.voice.SandboxedDetectionServiceBase {

    ctor public VisualQueryDetectionService();

    method @Nullable public android.os.IBinder onBind(@NonNull android.content.Intent);

    method public void onStartDetection(@NonNull android.service.voice.VisualQueryDetectionService.Callback);

    method public void onStopDetection();

    method public void onUpdateState(@Nullable android.os.PersistableBundle, @Nullable android.os.SharedMemory, long, @Nullable java.util.function.IntConsumer);

    field public static final String SERVICE_INTERFACE = "android.service.voice.VisualQueryDetectionService";

  }

  public static final class VisualQueryDetectionService.Callback {

    ctor public VisualQueryDetectionService.Callback();

  }

  public class VoiceInteractionService extends android.app.Service {

    method @NonNull public final android.service.voice.AlwaysOnHotwordDetector createAlwaysOnHotwordDetector(String, java.util.Locale, android.service.voice.AlwaysOnHotwordDetector.Callback);

    method @NonNull @RequiresPermission(android.Manifest.permission.MANAGE_HOTWORD_DETECTION) public final android.service.voice.AlwaysOnHotwordDetector createAlwaysOnHotwordDetector(String, java.util.Locale, @Nullable android.os.PersistableBundle, @Nullable android.os.SharedMemory, android.service.voice.AlwaysOnHotwordDetector.Callback);

/*

 * 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.service.voice;

import android.annotation.DurationMillisLong;

import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.SdkConstant;

import android.annotation.SystemApi;

import android.app.Service;

import android.content.ContentCaptureOptions;

import android.content.Intent;

import android.hardware.soundtrigger.SoundTrigger;

import android.media.AudioFormat;

import android.os.IBinder;

import android.os.IRemoteCallback;

import android.os.ParcelFileDescriptor;

import android.os.PersistableBundle;

import android.os.RemoteException;

import android.os.SharedMemory;

import android.speech.IRecognitionServiceManager;

import android.util.Log;

import android.view.contentcapture.IContentCaptureManager;

import java.util.function.IntConsumer;

/**

 * Implemented by an application that wants to offer query detection with visual signals.

 *

 * This service leverages visual signals such as camera frames to detect and stream queries from the

 * device microphone to the {@link VoiceInteractionService}, without the support of hotword. The

 * system will bind an application's {@link VoiceInteractionService} first. When

 * {@link VoiceInteractionService#createVisualQueryDetector(PersistableBundle, SharedMemory,

 * Executor, VisualQueryDetector.Callback)} is called, the system will bind the application's

 * {@link VisualQueryDetectionService}. When requested from {@link VoiceInteractionService}, the

 * system calls into the {@link VisualQueryDetectionService#onStartDetection(Callback)} to enable

 * detection. This method MUST be implemented to support visual query detection service.

 *

 * Note: Methods in this class may be called concurrently.

 *

 * @hide

 */

@SystemApi

public abstract class VisualQueryDetectionService extends Service

        implements SandboxedDetectionServiceBase {

    private static final String TAG = VisualQueryDetectionService.class.getSimpleName();

    private static final long UPDATE_TIMEOUT_MILLIS = 20000;

    /**

     * The {@link Intent} that must be declared as handled by the service.

     * To be supported, the service must also require the

     * {@link android.Manifest.permission#BIND_VISUAL_QUERY_DETECTION_SERVICE} permission

     * so that other applications can not abuse it.

     */

    @SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION)

    public static final String SERVICE_INTERFACE =

            "android.service.voice.VisualQueryDetectionService";

    /** @hide */

    public static final String KEY_INITIALIZATION_STATUS = "initialization_status";

    private final ISandboxedDetectionService mInterface = new ISandboxedDetectionService.Stub() {

        @Override

        public void updateState(PersistableBundle options, SharedMemory sharedMemory,

                IRemoteCallback callback) throws RemoteException {

            Log.v(TAG, "#updateState" + (callback != null ? " with callback" : ""));

            VisualQueryDetectionService.this.onUpdateStateInternal(

                    options,

                    sharedMemory,

                    callback);

        }

        @Override

        public void ping(IRemoteCallback callback) throws RemoteException {

            callback.sendResult(null);

        }

        @Override

        public void detectFromDspSource(

                SoundTrigger.KeyphraseRecognitionEvent event,

                AudioFormat audioFormat,

                long timeoutMillis,

                IDspHotwordDetectionCallback callback) {

            throw new UnsupportedOperationException("Not supported by VisualQueryDetectionService");

        }

        @Override

        public void detectFromMicrophoneSource(

                ParcelFileDescriptor audioStream,

                @HotwordDetectionService.AudioSource int audioSource,

                AudioFormat audioFormat,

                PersistableBundle options,

                IDspHotwordDetectionCallback callback) {

            throw new UnsupportedOperationException("Not supported by VisualQueryDetectionService");

        }

        @Override

        public void updateAudioFlinger(IBinder audioFlinger) {

            Log.v(TAG, "Ignore #updateAudioFlinger");

        }

        @Override

        public void updateContentCaptureManager(IContentCaptureManager manager,

                ContentCaptureOptions options) {

            Log.v(TAG, "Ignore #updateContentCaptureManager");

        }

        @Override

        public void updateRecognitionServiceManager(IRecognitionServiceManager manager) {

            Log.v(TAG, "Ignore #updateRecognitionServiceManager");

        }

        @Override

        public void stopDetection() {

            throw new UnsupportedOperationException("Not supported by VisualQueryDetectionService");

        }

    };

    /**

     * {@inheritDoc}

     * @hide

     */

    @Override

    @SystemApi

    public void onUpdateState(

            @Nullable PersistableBundle options,

            @Nullable SharedMemory sharedMemory,

            @DurationMillisLong long callbackTimeoutMillis,

            @Nullable IntConsumer statusCallback) {

    }

    @Override

    @Nullable

    public IBinder onBind(@NonNull Intent intent) {

        if (SERVICE_INTERFACE.equals(intent.getAction())) {

            return mInterface.asBinder();

        }

        Log.w(TAG, "Tried to bind to wrong intent (should be " + SERVICE_INTERFACE + ": "

                + intent);

        return null;

    }

    private void onUpdateStateInternal(@Nullable PersistableBundle options,

            @Nullable SharedMemory sharedMemory, IRemoteCallback callback) {

        IntConsumer intConsumer =

                SandboxedDetectionServiceBase.createInitializationStatusConsumer(callback);

        onUpdateState(options, sharedMemory, UPDATE_TIMEOUT_MILLIS, intConsumer);

    }

    /**

     * This is called after the service is set up and the client should open the camera and the

     * microphone to start recognition.

     *

     * Called when the {@link VoiceInteractionService} requests that this service

     * {@link HotwordDetector#startRecognition()} start recognition on audio coming directly

     * from the device microphone.

     *

     * @param callback The callback to use for responding to the detection request.

     *

     */

    public void onStartDetection(@NonNull Callback callback) {

        throw new UnsupportedOperationException();

    }

    /**

     * Called when the {@link VoiceInteractionService}

     * {@link HotwordDetector#stopRecognition()} requests that recognition be stopped.

     */

    public void onStopDetection() {

    }

    /**

     * Callback for sending out signals and returning query results.

     */

    public static final class Callback {

        //TODO: Add callback to send signals to VIS and SysUI.

    }

}