1 /* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef AUDIO_LOOPBACK_H 17 #define AUDIO_LOOPBACK_H 18 19 #include "audio_stream_change_info.h" 20 21 namespace OHOS { 22 namespace AudioStandard { 23 24 25 class AudioLoopbackCallback { 26 public: 27 virtual ~AudioLoopbackCallback() = default; 28 29 /** 30 * Called when loopback state is updated. 31 * 32 * @param state Indicates updated state of the loopback. 33 * For details, refer AudioLoopbackStatus enum. 34 */ 35 virtual void OnStatusChange(const AudioLoopbackStatus state, 36 const StateChangeCmdType cmdType = CMD_FROM_CLIENT) = 0; 37 }; 38 39 /** 40 * @brief audio loopback 41 * @since 20 42 */ 43 class AudioLoopback { 44 public: 45 /** 46 * @brief create loopback instance. 47 * 48 * @param rendererOptions The audio loopback configuration to be used while creating loopback instance. 49 * @param appInfo Originating application's uid and token id can be passed here 50 * @return Returns shared pointer to the AudioLoopback object 51 * @since 20 52 */ 53 static std::shared_ptr<AudioLoopback> CreateAudioLoopback(AudioLoopbackMode mode, 54 const AppInfo &appInfo = AppInfo()); 55 56 virtual bool Enable(bool enable) = 0; 57 58 virtual AudioLoopbackStatus GetStatus() = 0; 59 60 virtual int32_t SetVolume(float volume) = 0; 61 62 virtual int32_t SetAudioLoopbackCallback(const std::shared_ptr<AudioLoopbackCallback> &callback) = 0; 63 64 virtual int32_t RemoveAudioLoopbackCallback() = 0; 65 66 virtual bool SetReverbPreset(AudioLoopbackReverbPreset preset) = 0; 67 68 virtual AudioLoopbackReverbPreset GetReverbPreset() = 0; 69 70 virtual bool SetEqualizerPreset(AudioLoopbackEqualizerPreset preset) = 0; 71 72 virtual AudioLoopbackEqualizerPreset GetEqualizerPreset() = 0; 73 74 virtual ~AudioLoopback(); 75 }; 76 } // namespace AudioStandard 77 } // namespace OHOS 78 #endif