1 /* 2 * Copyright (c) 2023-2023 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 HISTREAMER_PIPELINE_CORE_PIPELINE_H 17 #define HISTREAMER_PIPELINE_CORE_PIPELINE_H 18 19 #include <string> 20 #include <vector> 21 #include <memory> 22 #include "common/status.h" 23 #include "filter/filter.h" 24 #include "osal/task/mutex.h" 25 26 namespace OHOS { 27 namespace Media { 28 namespace Pipeline { 29 class FilterCallback; 30 31 class Pipeline : public EventReceiver { 32 public: 33 ~Pipeline(); 34 35 void Init(const std::shared_ptr<EventReceiver>& receiver, const std::shared_ptr<FilterCallback>& callback); 36 37 Status Prepare(); 38 39 Status Start(); 40 41 Status Pause(); 42 43 Status Resume(); 44 45 Status Stop(); 46 47 Status Flush(); 48 49 Status Release(); 50 51 Status AddHeadFilters(std::vector<std::shared_ptr<Filter>> filters); 52 53 Status RemoveHeadFilter(const std::shared_ptr<Filter>& filter); 54 55 Status LinkFilters(const std::shared_ptr<Filter>& preFilter, 56 const std::vector<std::shared_ptr<Filter>>& filters, StreamType type); 57 58 Status UpdateFilters(const std::shared_ptr<Filter>& preFilter, 59 const std::vector<std::shared_ptr<Filter>>& filters, StreamType type); 60 61 Status UnLinkFilters(const std::shared_ptr<Filter>& preFilter, 62 const std::vector<std::shared_ptr<Filter>>& filters, StreamType type); 63 64 void OnEvent(const Event& event) override; 65 private: 66 FilterState state_ {FilterState::CREATED}; 67 Mutex mutex_ {}; 68 std::vector<std::shared_ptr<Filter>> filters_ {}; 69 std::shared_ptr<EventReceiver> eventReceiver_ {nullptr}; 70 std::shared_ptr<FilterCallback> filterCallback_ {nullptr}; 71 }; 72 } // namespace Pipeline 73 } // namespace Media 74 } // namespace OHOS 75 #endif // HISTREAMER_PIPELINE_CORE_PIPELINE_H 76