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 #include <stdint.h> 24 25 #include <map> 26 27 #include "DrmDevice.h" 28 #include "utils/Worker.h" 29 30 namespace android { 31 32 class VsyncCallback { 33 public: ~VsyncCallback()34 virtual ~VsyncCallback() { 35 } 36 virtual void Callback(int display, int64_t timestamp) = 0; 37 }; 38 39 class VSyncWorker : public Worker { 40 public: 41 VSyncWorker(); 42 ~VSyncWorker() override; 43 44 int Init(DrmDevice *drm, int display); 45 void RegisterCallback(std::shared_ptr<VsyncCallback> callback); 46 void RegisterClientCallback(hwc2_callback_data_t data, 47 hwc2_function_pointer_t hook); 48 49 void VSyncControl(bool enabled); 50 51 protected: 52 void Routine() override; 53 54 private: 55 int64_t GetPhasedVSync(int64_t frame_ns, int64_t current); 56 int SyntheticWaitVBlank(int64_t *timestamp); 57 58 DrmDevice *drm_; 59 60 // shared_ptr since we need to use this outside of the thread lock (to 61 // actually call the hook) and we don't want the memory freed until we're 62 // done 63 std::shared_ptr<VsyncCallback> callback_ = NULL; 64 65 int display_; 66 std::atomic_bool enabled_; 67 int64_t last_timestamp_; 68 69 hwc2_callback_data_t vsync_callback_data_ = NULL; 70 HWC2_PFN_VSYNC vsync_callback_hook_ = NULL; 71 }; 72 } // namespace android 73 74 #endif 75