| /** |
| * Copyright (C) 2014 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.media.soundtrigger; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.annotation.RequiresPermission; |
| import android.annotation.SystemApi; |
| import android.annotation.SystemService; |
| import android.content.Context; |
| import android.hardware.soundtrigger.SoundTrigger; |
| import android.os.Handler; |
| import android.os.ParcelUuid; |
| import android.os.RemoteException; |
| import android.util.Slog; |
| |
| import com.android.internal.app.ISoundTriggerService; |
| |
| import java.util.HashMap; |
| import java.util.UUID; |
| |
| /** |
| * This class provides management of non-voice (general sound trigger) based sound recognition |
| * models. Usage of this class is restricted to system or signature applications only. This allows |
| * OEMs to write apps that can manage non-voice based sound trigger models. |
| * |
| * @hide |
| */ |
| @SystemApi |
| @SystemService(Context.SOUND_TRIGGER_SERVICE) |
| public final class SoundTriggerManager { |
| private static final boolean DBG = false; |
| private static final String TAG = "SoundTriggerManager"; |
| |
| private final Context mContext; |
| private final ISoundTriggerService mSoundTriggerService; |
| |
| // Stores a mapping from the sound model UUID to the SoundTriggerInstance created by |
| // the createSoundTriggerDetector() call. |
| private final HashMap<UUID, SoundTriggerDetector> mReceiverInstanceMap; |
| |
| /** |
| * @hide |
| */ |
| public SoundTriggerManager(Context context, ISoundTriggerService soundTriggerService ) { |
| if (DBG) { |
| Slog.i(TAG, "SoundTriggerManager created."); |
| } |
| mSoundTriggerService = soundTriggerService; |
| mContext = context; |
| mReceiverInstanceMap = new HashMap<UUID, SoundTriggerDetector>(); |
| } |
| |
| /** |
| * Updates the given sound trigger model. |
| */ |
| @RequiresPermission(android.Manifest.permission.MANAGE_SOUND_TRIGGER) |
| public void updateModel(Model model) { |
| try { |
| mSoundTriggerService.updateSoundModel(model.getGenericSoundModel()); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| |
| /** |
| * Returns the sound trigger model represented by the given UUID. An instance of {@link Model} |
| * is returned. |
| */ |
| @RequiresPermission(android.Manifest.permission.MANAGE_SOUND_TRIGGER) |
| public Model getModel(UUID soundModelId) { |
| try { |
| return new Model(mSoundTriggerService.getSoundModel( |
| new ParcelUuid(soundModelId))); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| |
| /** |
| * Deletes the sound model represented by the provided UUID. |
| */ |
| @RequiresPermission(android.Manifest.permission.MANAGE_SOUND_TRIGGER) |
| public void deleteModel(UUID soundModelId) { |
| try { |
| mSoundTriggerService.deleteSoundModel(new ParcelUuid(soundModelId)); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| |
| /** |
| * Creates an instance of {@link SoundTriggerDetector} which can be used to start/stop |
| * recognition on the model and register for triggers from the model. Note that this call |
| * invalidates any previously returned instances for the same sound model Uuid. |
| * |
| * @param soundModelId UUID of the sound model to create the receiver object for. |
| * @param callback Instance of the {@link SoundTriggerDetector#Callback} object for the |
| * callbacks for the given sound model. |
| * @param handler The Handler to use for the callback operations. A null value will use the |
| * current thread's Looper. |
| * @return Instance of {@link SoundTriggerDetector} or null on error. |
| */ |
| @Nullable |
| @RequiresPermission(android.Manifest.permission.MANAGE_SOUND_TRIGGER) |
| public SoundTriggerDetector createSoundTriggerDetector(UUID soundModelId, |
| @NonNull SoundTriggerDetector.Callback callback, @Nullable Handler handler) { |
| if (soundModelId == null) { |
| return null; |
| } |
| |
| SoundTriggerDetector oldInstance = mReceiverInstanceMap.get(soundModelId); |
| if (oldInstance != null) { |
| // Shutdown old instance. |
| } |
| SoundTriggerDetector newInstance = new SoundTriggerDetector(mSoundTriggerService, |
| soundModelId, callback, handler); |
| mReceiverInstanceMap.put(soundModelId, newInstance); |
| return newInstance; |
| } |
| |
| /** |
| * Class captures the data and fields that represent a non-keyphrase sound model. Use the |
| * factory constructor {@link Model#create()} to create an instance. |
| */ |
| // We use encapsulation to expose the SoundTrigger.GenericSoundModel as a SystemApi. This |
| // prevents us from exposing SoundTrigger.GenericSoundModel as an Api. |
| public static class Model { |
| |
| private SoundTrigger.GenericSoundModel mGenericSoundModel; |
| |
| /** |
| * @hide |
| */ |
| Model(SoundTrigger.GenericSoundModel soundTriggerModel) { |
| mGenericSoundModel = soundTriggerModel; |
| } |
| |
| /** |
| * Factory constructor to create a SoundModel instance for use with methods in this |
| * class. |
| */ |
| public static Model create(UUID modelUuid, UUID vendorUuid, byte[] data) { |
| return new Model(new SoundTrigger.GenericSoundModel(modelUuid, |
| vendorUuid, data)); |
| } |
| |
| public UUID getModelUuid() { |
| return mGenericSoundModel.uuid; |
| } |
| |
| public UUID getVendorUuid() { |
| return mGenericSoundModel.vendorUuid; |
| } |
| |
| public byte[] getModelData() { |
| return mGenericSoundModel.data; |
| } |
| |
| /** |
| * @hide |
| */ |
| SoundTrigger.GenericSoundModel getGenericSoundModel() { |
| return mGenericSoundModel; |
| } |
| } |
| } |