| /* |
| * Copyright (C) 2015 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 com.android.car; |
| |
| import android.content.Context; |
| import android.media.AudioAttributes; |
| import android.media.IVolumeController; |
| import android.view.KeyEvent; |
| |
| import com.android.car.hal.AudioHalService; |
| import com.android.car.vehiclenetwork.VehicleNetworkConsts.VehicleAudioContextFlag; |
| |
| import java.io.PrintWriter; |
| |
| /** |
| * Handles car volume controls. |
| * |
| * It delegates to a {@link com.android.car.CarVolumeService.CarVolumeController} to do proper |
| * volume controls based on different car properties. |
| * |
| * @hide |
| */ |
| public class CarVolumeService { |
| private static final String TAG = "CarVolumeService"; |
| |
| // TODO: need to have a policy to define the default context |
| public static int DEFAULT_CAR_AUDIO_CONTEXT = |
| VehicleAudioContextFlag.VEHICLE_AUDIO_CONTEXT_MUSIC_FLAG; |
| private final Context mContext; |
| private final AudioHalService mAudioHal; |
| private final CarAudioService mAudioService; |
| private final CarInputService mInputService; |
| |
| private CarVolumeController mCarVolumeController; |
| |
| private IVolumeController mIVolumeController; |
| |
| public static int androidStreamToCarUsage(int logicalAndroidStream) { |
| return CarAudioAttributesUtil.getCarUsageFromAudioAttributes( |
| new AudioAttributes.Builder() |
| .setLegacyStreamType(logicalAndroidStream).build()); |
| } |
| |
| public CarVolumeService(Context context, CarAudioService audioService, AudioHalService audioHal, |
| CarInputService inputService) { |
| mContext = context; |
| mAudioHal = audioHal; |
| mAudioService = audioService; |
| mInputService = inputService; |
| } |
| |
| public synchronized void init() { |
| mCarVolumeController = CarVolumeControllerFactory.createCarVolumeController(mContext, |
| mAudioService, mAudioHal, mInputService); |
| |
| mCarVolumeController.init(); |
| if (mIVolumeController != null) { |
| mCarVolumeController.setVolumeController(mIVolumeController); |
| } |
| mInputService.setVolumeKeyListener(mCarVolumeController); |
| } |
| |
| public void setStreamVolume(int streamType, int index, int flags) { |
| getController().setStreamVolume(streamType, index, flags); |
| } |
| |
| public synchronized void setVolumeController(IVolumeController controller) { |
| mIVolumeController = controller; |
| getController().setVolumeController(controller); |
| } |
| |
| public int getStreamMaxVolume(int stream) { |
| return getController().getStreamMaxVolume(stream); |
| } |
| |
| public int getStreamMinVolume(int stream) { |
| return getController().getStreamMinVolume(stream); |
| } |
| |
| public int getStreamVolume(int stream) { |
| return getController().getStreamVolume(stream); |
| } |
| |
| public void dump(PrintWriter writer) { |
| mCarVolumeController.dump(writer); |
| } |
| |
| private synchronized CarVolumeController getController() { |
| return mCarVolumeController; |
| } |
| |
| /** |
| * Abstraction layer for volume controls, so that we don't have if-else check for audio |
| * properties everywhere. |
| */ |
| public static abstract class CarVolumeController implements CarInputService.KeyEventListener { |
| abstract void init(); |
| abstract public void setStreamVolume(int stream, int index, int flags); |
| abstract public void setVolumeController(IVolumeController controller); |
| abstract public int getStreamMaxVolume(int stream); |
| abstract public int getStreamMinVolume(int stream); |
| abstract public int getStreamVolume(int stream); |
| abstract public void dump(PrintWriter writer); |
| } |
| } |