1 /* 2 // Copyright (c) 2014 Intel Corporation 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 #ifndef SOFT_VSYNC_OBSERVER_H 17 #define SOFT_VSYNC_OBSERVER_H 18 19 #include <common/base/SimpleThread.h> 20 21 namespace android { 22 namespace intel { 23 24 class IDisplayDevice; 25 26 class SoftVsyncObserver { 27 public: 28 SoftVsyncObserver(IDisplayDevice& disp); 29 virtual ~SoftVsyncObserver(); 30 31 public: 32 virtual bool initialize(); 33 virtual void deinitialize(); 34 virtual void setRefreshRate(int rate); 35 virtual bool control(bool enabled); 36 37 private: 38 IDisplayDevice& mDisplayDevice; 39 int mDevice; 40 bool mEnabled; 41 int mRefreshRate; 42 nsecs_t mRefreshPeriod; 43 mutable Mutex mLock; 44 Condition mCondition; 45 mutable nsecs_t mNextFakeVSync; 46 bool mExitThread; 47 bool mInitialized; 48 49 private: 50 DECLARE_THREAD(VsyncEventPollThread, SoftVsyncObserver); 51 }; 52 53 } // namespace intel 54 } // namespace android 55 56 57 58 #endif /* SOFT_VSYNC_OBSERVER_H */ 59 60