1 /* 2 * Copyright (c) 2021 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 17 #ifndef VSYNC_VSYNC_GENERATOR_H 18 #define VSYNC_VSYNC_GENERATOR_H 19 20 #include <refbase.h> 21 #include "graphic_common.h" 22 23 #include <mutex> 24 #include <vector> 25 #include <thread> 26 #include <condition_variable> 27 28 namespace OHOS { 29 namespace Rosen { 30 class VSyncGenerator : public RefBase { 31 public: 32 class Callback : public RefBase { 33 public: 34 virtual void OnVSyncEvent(int64_t) = 0; 35 }; 36 VSyncGenerator() = default; 37 virtual ~VSyncGenerator() noexcept = default; 38 virtual VsyncError UpdateMode(int64_t period, int64_t phase, int64_t refrenceTime) = 0; 39 virtual VsyncError AddListener(int64_t phase, const sptr<Callback>& cb) = 0; 40 virtual VsyncError RemoveListener(const sptr<Callback>& cb) = 0; 41 virtual VsyncError ChangePhaseOffset(const sptr<Callback>& cb, int64_t offset) = 0; 42 }; 43 44 sptr<VSyncGenerator> CreateVSyncGenerator(); 45 void DestroyVSyncGenerator(); 46 47 namespace impl { 48 class VSyncGenerator : public OHOS::Rosen::VSyncGenerator { 49 public: 50 static sptr<OHOS::Rosen::VSyncGenerator> GetInstance() noexcept; 51 static void DeleteInstance() noexcept; 52 53 // nocopyable 54 VSyncGenerator(const VSyncGenerator &) = delete; 55 VSyncGenerator &operator=(const VSyncGenerator &) = delete; 56 VsyncError UpdateMode(int64_t period, int64_t phase, int64_t refrenceTime) override; 57 VsyncError AddListener(int64_t phase, const sptr<OHOS::Rosen::VSyncGenerator::Callback>& cb) override; 58 VsyncError RemoveListener(const sptr<OHOS::Rosen::VSyncGenerator::Callback>& cb) override; 59 VsyncError ChangePhaseOffset(const sptr<OHOS::Rosen::VSyncGenerator::Callback>& cb, int64_t offset) override; 60 61 private: 62 friend class OHOS::Rosen::VSyncGenerator; 63 64 struct Listener { 65 int64_t phase_; 66 sptr<OHOS::Rosen::VSyncGenerator::Callback> callback_; 67 int64_t lastTime_; 68 }; 69 70 VSyncGenerator(); 71 ~VSyncGenerator() noexcept override; 72 73 int64_t ComputeNextVSyncTimeStamp(int64_t now); 74 std::vector<Listener> GetListenerTimeouted(int64_t now); 75 int64_t ComputeListenerNextVSyncTimeStamp(const Listener &listen, int64_t now); 76 void ThreadLoop(); 77 78 int64_t period_; 79 int64_t phase_; 80 int64_t refrenceTime_; 81 int64_t wakeupDelay_; 82 83 std::vector<Listener> listeners_; 84 85 std::mutex mutex_; 86 std::condition_variable con_; 87 std::mutex waitForTimeoutMtx_; 88 std::condition_variable waitForTimeoutCon_; 89 std::thread thread_; 90 bool vsyncThreadRunning_; 91 static std::once_flag createFlag_; 92 static sptr<OHOS::Rosen::VSyncGenerator> instance_; 93 }; 94 } // impl 95 } // namespace Rosen 96 } // namespace OHOS 97 98 #endif 99