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 <stdint.h> 23 #include <utils/String8.h> 24 25 #include <map> 26 27 #include "drmdevice.h" 28 #include "worker.h" 29 30 namespace android { 31 32 class VsyncCallback { 33 public: ~VsyncCallback()34 virtual ~VsyncCallback() {} 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, const String8 &display_trace_name); 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 int GetPhasedVSync(int64_t frame_ns, int64_t &expect); 53 int SyntheticWaitVBlank(int64_t ×tamp); 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 String8 hw_vsync_period_tag_; 66 String8 hw_vsync_enabled_tag_; 67 String8 display_trace_name_; 68 }; 69 } // namespace android 70 71 #endif 72