1 /* 2 * Copyright 2018 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 #pragma once 17 18 #include <mutex> 19 #include <string> 20 21 #include "DispSync.h" 22 #include "EventThread.h" 23 24 namespace android { 25 26 class DispSyncSource final : public VSyncSource, private DispSync::Callback { 27 public: 28 DispSyncSource(DispSync* dispSync, nsecs_t phaseOffset, bool traceVsync, const char* name); 29 30 ~DispSyncSource() override = default; 31 32 // The following methods are implementation of VSyncSource. 33 void setVSyncEnabled(bool enable) override; 34 void setCallback(VSyncSource::Callback* callback) override; 35 void setPhaseOffset(nsecs_t phaseOffset) override; 36 37 private: 38 // The following method is the implementation of the DispSync::Callback. 39 virtual void onDispSyncEvent(nsecs_t when); 40 41 const char* const mName; 42 int mValue = 0; 43 44 const bool mTraceVsync; 45 const std::string mVsyncOnLabel; 46 const std::string mVsyncEventLabel; 47 nsecs_t mLastCallbackTime GUARDED_BY(mVsyncMutex) = 0; 48 49 DispSync* mDispSync; 50 51 std::mutex mCallbackMutex; 52 VSyncSource::Callback* mCallback GUARDED_BY(mCallbackMutex) = nullptr; 53 54 std::mutex mVsyncMutex; 55 nsecs_t mPhaseOffset GUARDED_BY(mVsyncMutex); 56 bool mEnabled GUARDED_BY(mVsyncMutex) = false; 57 }; 58 59 } // namespace android