1 /* 2 * Copyright (C) 2020 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 #ifndef ANDROID_HARDWARE_AUTOMOTIVE_AUDIOCONTROL_AUDIOCONTROL_H 17 #define ANDROID_HARDWARE_AUTOMOTIVE_AUDIOCONTROL_AUDIOCONTROL_H 18 19 #include <aidl/android/hardware/automotive/audiocontrol/AudioFocusChange.h> 20 #include <aidl/android/hardware/automotive/audiocontrol/AudioGainConfigInfo.h> 21 #include <aidl/android/hardware/automotive/audiocontrol/BnAudioControl.h> 22 #include <aidl/android/hardware/automotive/audiocontrol/DuckingInfo.h> 23 #include <aidl/android/hardware/automotive/audiocontrol/IAudioGainCallback.h> 24 #include <aidl/android/hardware/automotive/audiocontrol/MutingInfo.h> 25 #include <aidl/android/hardware/automotive/audiocontrol/Reasons.h> 26 27 #include <aidl/android/hardware/audio/common/PlaybackTrackMetadata.h> 28 29 namespace aidl::android::hardware::automotive::audiocontrol { 30 31 namespace audiohalcommon = ::aidl::android::hardware::audio::common; 32 namespace audiomediacommon = ::aidl::android::media::audio::common; 33 34 class AudioControl : public BnAudioControl { 35 public: 36 ndk::ScopedAStatus onAudioFocusChange(const std::string& in_usage, int32_t in_zoneId, 37 AudioFocusChange in_focusChange) override; 38 ndk::ScopedAStatus onDevicesToDuckChange( 39 const std::vector<DuckingInfo>& in_duckingInfos) override; 40 ndk::ScopedAStatus onDevicesToMuteChange( 41 const std::vector<MutingInfo>& in_mutingInfos) override; 42 ndk::ScopedAStatus registerFocusListener( 43 const std::shared_ptr<IFocusListener>& in_listener) override; 44 ndk::ScopedAStatus setBalanceTowardRight(float in_value) override; 45 ndk::ScopedAStatus setFadeTowardFront(float in_value) override; 46 ndk::ScopedAStatus onAudioFocusChangeWithMetaData( 47 const audiohalcommon::PlaybackTrackMetadata& in_playbackMetaData, int32_t in_zoneId, 48 AudioFocusChange in_focusChange) override; 49 ndk::ScopedAStatus setAudioDeviceGainsChanged( 50 const std::vector<Reasons>& in_reasons, 51 const std::vector<AudioGainConfigInfo>& in_gains) override; 52 ndk::ScopedAStatus registerGainCallback( 53 const std::shared_ptr<IAudioGainCallback>& in_callback) override; 54 55 binder_status_t dump(int fd, const char** args, uint32_t numArgs) override; 56 57 private: 58 // This focus listener will only be used by this HAL instance to communicate with 59 // a single instance of CarAudioService. As such, it doesn't have explicit serialization. 60 // If a different AudioControl implementation were to have multiple threads leveraging this 61 // listener, then it should also include mutexes or make the listener atomic. 62 std::shared_ptr<IFocusListener> mFocusListener; 63 64 /** 65 * @brief mAudioGainCallback will be used by this HAL instance to communicate e.g. with a single 66 * instance of CarAudioService to report unexpected gain changed. 67 */ 68 std::shared_ptr<IAudioGainCallback> mAudioGainCallback = nullptr; 69 70 binder_status_t cmdHelp(int fd) const; 71 binder_status_t cmdRequestFocus(int fd, const char** args, uint32_t numArgs); 72 binder_status_t cmdAbandonFocus(int fd, const char** args, uint32_t numArgs); 73 binder_status_t cmdRequestFocusWithMetaData(int fd, const char** args, uint32_t numArgs); 74 binder_status_t cmdAbandonFocusWithMetaData(int fd, const char** args, uint32_t numArgs); 75 binder_status_t cmdOnAudioDeviceGainsChanged(int fd, const char** args, uint32_t numArgs); 76 77 binder_status_t parseMetaData(int fd, const std::string& metadataLiteral, 78 audiohalcommon::PlaybackTrackMetadata& trackMetadata); 79 80 binder_status_t dumpsys(int fd); 81 }; 82 83 } // namespace aidl::android::hardware::automotive::audiocontrol 84 85 #endif // ANDROID_HARDWARE_AUTOMOTIVE_AUDIOCONTROL_AUDIOCONTROL_H 86