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 "drmdevice.h" 21 #include "worker.h" 22 23 #include <stdint.h> 24 #include <map> 25 26 #include <hardware/hardware.h> 27 #include <hardware/hwcomposer.h> 28 29 namespace android { 30 31 class VsyncCallback { 32 public: ~VsyncCallback()33 virtual ~VsyncCallback() { 34 } 35 virtual void Callback(int display, int64_t timestamp) = 0; 36 }; 37 38 class VSyncWorker : public Worker { 39 public: 40 VSyncWorker(); 41 ~VSyncWorker() override; 42 43 int Init(DrmDevice *drm, int display); 44 void RegisterCallback(std::shared_ptr<VsyncCallback> callback); 45 46 void VSyncControl(bool enabled); 47 48 protected: 49 void Routine() override; 50 51 private: 52 int64_t GetPhasedVSync(int64_t frame_ns, int64_t current); 53 int SyntheticWaitVBlank(int64_t *timestamp); 54 55 DrmDevice *drm_; 56 57 // shared_ptr since we need to use this outside of the thread lock (to 58 // actually call the hook) and we don't want the memory freed until we're 59 // done 60 std::shared_ptr<VsyncCallback> callback_ = NULL; 61 62 int display_; 63 std::atomic_bool enabled_; 64 int64_t last_timestamp_; 65 }; 66 } // namespace android 67 68 #endif 69