1 /* 2 * Copyright (C) 2022 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.car.audio; 18 19 import android.annotation.NonNull; 20 import android.car.builtin.util.Slogf; 21 import android.hardware.automotive.audiocontrol.Reasons; 22 import android.util.SparseArray; 23 24 import com.android.car.CarLog; 25 import com.android.car.audio.hal.AudioControlWrapper; 26 import com.android.car.audio.hal.HalAudioGainCallback; 27 28 import java.util.ArrayList; 29 import java.util.List; 30 import java.util.Objects; 31 32 /** 33 * Provides audio gain callback registration helpers and implements AudioGain listener business 34 * logic. 35 */ 36 /* package */ final class CarAudioGainMonitor { 37 @NonNull private final AudioControlWrapper mAudioControlWrapper; 38 @NonNull private final SparseArray<CarAudioZone> mCarAudioZones; 39 CarAudioGainMonitor( AudioControlWrapper audioControlWrapper, SparseArray<CarAudioZone> carAudioZones)40 CarAudioGainMonitor( 41 AudioControlWrapper audioControlWrapper, 42 SparseArray<CarAudioZone> carAudioZones) { 43 mAudioControlWrapper = 44 Objects.requireNonNull( 45 audioControlWrapper, "Audio Control Wrapper can not be null"); 46 mCarAudioZones = Objects.requireNonNull(carAudioZones, "Car Audio Zones can not be null"); 47 } 48 reset()49 public void reset() { 50 // TODO (b/224885748): handle specific logic on IAudioControl service died event 51 } 52 53 /** 54 * Registers {@code HalAudioGainCallback} on {@code AudioControlWrapper} to receive HAL audio 55 * gain change notifications. 56 */ registerAudioGainListener(HalAudioGainCallback callback)57 public void registerAudioGainListener(HalAudioGainCallback callback) { 58 Objects.requireNonNull(callback, "Hal Audio Gain callback can not be null"); 59 mAudioControlWrapper.registerAudioGainCallback(callback); 60 } 61 62 /** Unregisters {@code HalAudioGainCallback} from {@code AudioControlWrapper}. */ unregisterAudioGainListener()63 public void unregisterAudioGainListener() { 64 mAudioControlWrapper.unregisterAudioGainCallback(); 65 } 66 67 /** 68 * Audio Gain event dispatcher. Implements the callback that triggered from {@link 69 * IAudioGainCallback#onAudioDeviceGainsChanged} with the list of reasons and the list of {@link 70 * CarAudioGainConfigInfo} involved. It is in charge of dispatching /delegating to the zone the 71 * {@link CarAudioGainConfigInfo} belongs the processing of the callback. 72 */ handleAudioDeviceGainsChanged(List<Integer> reasons, List<CarAudioGainConfigInfo> gains)73 void handleAudioDeviceGainsChanged(List<Integer> reasons, List<CarAudioGainConfigInfo> gains) { 74 // Delegate to CarAudioZone / CarVolumeGroup 75 // Group gains by Audio Zones first 76 SparseArray<List<CarAudioGainConfigInfo>> gainsByZones = new SparseArray<>(); 77 for (int index = 0; index < gains.size(); index++) { 78 CarAudioGainConfigInfo gain = gains.get(index); 79 int zone = gain.getZoneId(); 80 if (!gainsByZones.contains(zone)) { 81 gainsByZones.put(zone, new ArrayList<>(1)); 82 } 83 gainsByZones.get(zone).add(gain); 84 } 85 for (int i = 0; i < gainsByZones.size(); i++) { 86 int zoneId = gainsByZones.keyAt(i); 87 if (!mCarAudioZones.contains(zoneId)) { 88 Slogf.e( 89 CarLog.TAG_AUDIO, 90 "onAudioDeviceGainsChanged reported change on invalid " 91 + "zone: %d, reasons=%s, gains=%s", 92 zoneId, 93 reasons, 94 gains); 95 continue; 96 } 97 CarAudioZone carAudioZone = mCarAudioZones.get(zoneId); 98 carAudioZone.onAudioGainChanged(reasons, gainsByZones.valueAt(i)); 99 } 100 } 101 shouldBlockVolumeRequest(List<Integer> reasons)102 static boolean shouldBlockVolumeRequest(List<Integer> reasons) { 103 return reasons.contains(Reasons.FORCED_MASTER_MUTE) 104 || reasons.contains(Reasons.TCU_MUTE) 105 || reasons.contains(Reasons.REMOTE_MUTE); 106 } 107 shouldLimitVolume(List<Integer> reasons)108 static boolean shouldLimitVolume(List<Integer> reasons) { 109 return reasons.contains(Reasons.THERMAL_LIMITATION) 110 || reasons.contains(Reasons.SUSPEND_EXIT_VOL_LIMITATION); 111 } 112 shouldDuckGain(List<Integer> reasons)113 static boolean shouldDuckGain(List<Integer> reasons) { 114 return reasons.contains(Reasons.ADAS_DUCKING) || reasons.contains(Reasons.NAV_DUCKING); 115 } 116 } 117