1 /* 2 * Copyright (c) 2022 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 OHOS_FOCUS_SESSION_STRATEGY_H 17 #define OHOS_FOCUS_SESSION_STRATEGY_H 18 19 #include <functional> 20 #include <map> 21 #include <memory> 22 #include "audio_stream_manager.h" 23 #include "audio_adapter.h" 24 25 namespace OHOS::AVSession { 26 class FocusSessionStrategy { 27 public: 28 struct FocusSessionChangeInfo { 29 int32_t uid {}; 30 }; 31 using FocusSessionChangeCallback = std::function<void(const FocusSessionChangeInfo&)>; 32 using FocusSessionSelector = std::function<bool(const FocusSessionChangeInfo&)>; 33 34 FocusSessionStrategy(); 35 ~FocusSessionStrategy(); 36 37 void Init(); 38 39 void RegisterFocusSessionChangeCallback(const FocusSessionChangeCallback& callback); 40 void RegisterFocusSessionSelector(const FocusSessionSelector& selector); 41 42 private: 43 void HandleAudioRenderStateChangeEvent(const AudioRendererChangeInfos& infos); 44 45 bool IsFocusSession(const AudioStandard::AudioRendererChangeInfo& info); 46 bool SelectFocusSession(const AudioRendererChangeInfos& infos, FocusSessionChangeInfo& sessionInfo); 47 48 FocusSessionChangeCallback callback_; 49 FocusSessionSelector selector_; 50 std::shared_ptr<AudioStandard::AudioRendererStateChangeCallback> audioRendererStateChangeCallback_; 51 std::recursive_mutex stateLock_; 52 std::map<int32_t, AudioStandard::RendererState> lastStates_; 53 }; 54 } 55 #endif // OHOS_FOCUS_SESSION_STRATEGY_H