1 /* 2 * Copyright (C) 2015 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 17 #ifndef ANDROID_EVENT_WORKER_H_ 18 #define ANDROID_EVENT_WORKER_H_ 19 20 #include <hardware/hardware.h> 21 #include <hardware/hwcomposer.h> 22 #include <hardware/hwcomposer2.h> 23 24 #include <atomic> 25 #include <cstdint> 26 #include <functional> 27 #include <map> 28 29 #include "DrmDevice.h" 30 #include "utils/Worker.h" 31 32 namespace android { 33 34 class VSyncWorker : public Worker { 35 public: 36 VSyncWorker(); 37 ~VSyncWorker() override = default; 38 39 auto Init(DrmDisplayPipeline *pipe, 40 std::function<void(uint64_t /*timestamp*/)> callback) -> int; 41 42 void VSyncControl(bool enabled); 43 44 protected: 45 void Routine() override; 46 47 private: 48 int64_t GetPhasedVSync(int64_t frame_ns, int64_t current) const; 49 int SyntheticWaitVBlank(int64_t *timestamp); 50 51 std::function<void(uint64_t /*timestamp*/)> callback_; 52 53 DrmDisplayPipeline *pipe_ = nullptr; 54 std::atomic_bool enabled_ = false; 55 int64_t last_timestamp_ = -1; 56 }; 57 } // namespace android 58 59 #endif 60