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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.systemui.volume.car;
     18 
     19 import android.car.Car;
     20 import android.car.CarNotConnectedException;
     21 import android.car.media.CarAudioManager;
     22 import android.content.ComponentName;
     23 import android.content.Context;
     24 import android.content.ServiceConnection;
     25 import android.os.IBinder;
     26 import android.util.Log;
     27 
     28 import com.android.systemui.volume.VolumeDialogControllerImpl;
     29 
     30 /**
     31  * A volume dialog controller for the automotive use case.
     32  *
     33  * {@link android.car.media.CarAudioManager} is the source of truth to get the stream volumes.
     34  * And volume changes should be sent to the car's audio module instead of the android's audio mixer.
     35  */
     36 public class CarVolumeDialogController extends VolumeDialogControllerImpl {
     37     private static final String TAG = "CarVolumeDialogController";
     38 
     39     private final Car mCar;
     40     private CarAudioManager mCarAudioManager;
     41 
     42     private final ServiceConnection mConnection = new ServiceConnection() {
     43         @Override
     44         public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
     45             try {
     46                 mCarAudioManager = (CarAudioManager) mCar.getCarManager(Car.AUDIO_SERVICE);
     47                 setVolumeController();
     48                 CarVolumeDialogController.this.getState();
     49             } catch (CarNotConnectedException e) {
     50                 Log.e(TAG, "Car is not connected!", e);
     51             }
     52         }
     53 
     54         @Override
     55         public void onServiceDisconnected(ComponentName componentName) {
     56             Log.e(TAG, "Car service is disconnected");
     57         }
     58     };
     59 
     60     public CarVolumeDialogController(Context context) {
     61         super(context);
     62         mCar = Car.createCar(context, mConnection);
     63         mCar.connect();
     64     }
     65 
     66     @Override
     67     protected void setAudioManagerStreamVolume(int stream, int level, int flag) {
     68         if (mCarAudioManager == null) {
     69             Log.d(TAG, "Car audio manager is not initialized yet");
     70             return;
     71         }
     72         try {
     73             mCarAudioManager.setStreamVolume(stream, level, flag);
     74         } catch (CarNotConnectedException e) {
     75             Log.e(TAG, "Car is not connected", e);
     76         }
     77     }
     78 
     79     @Override
     80     protected int getAudioManagerStreamVolume(int stream) {
     81         if(mCarAudioManager == null) {
     82             Log.d(TAG, "Car audio manager is not initialized yet");
     83             return 0;
     84         }
     85 
     86         try {
     87             return mCarAudioManager.getStreamVolume(stream);
     88         } catch (CarNotConnectedException e) {
     89             Log.e(TAG, "Car is not connected", e);
     90             return 0;
     91         }
     92     }
     93 
     94     @Override
     95     protected int getAudioManagerStreamMaxVolume(int stream) {
     96         if(mCarAudioManager == null) {
     97             Log.d(TAG, "Car audio manager is not initialized yet");
     98             return 0;
     99         }
    100 
    101         try {
    102             return mCarAudioManager.getStreamMaxVolume(stream);
    103         } catch (CarNotConnectedException e) {
    104             Log.e(TAG, "Car is not connected", e);
    105             return 0;
    106         }
    107     }
    108 
    109     @Override
    110     protected int getAudioManagerStreamMinVolume(int stream) {
    111         if(mCarAudioManager == null) {
    112             Log.d(TAG, "Car audio manager is not initialized yet");
    113             return 0;
    114         }
    115 
    116         try {
    117             return mCarAudioManager.getStreamMinVolume(stream);
    118         } catch (CarNotConnectedException e) {
    119             Log.e(TAG, "Car is not connected", e);
    120             return 0;
    121         }
    122     }
    123 
    124     @Override
    125     public void setVolumeController() {
    126         if (mCarAudioManager == null) {
    127             Log.d(TAG, "Car audio manager is not initialized yet");
    128             return;
    129         }
    130         try {
    131             mCarAudioManager.setVolumeController(mVolumeController);
    132         } catch (CarNotConnectedException e) {
    133             Log.e(TAG, "Car is not connected", e);
    134         }
    135     }
    136 }
    137