/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef TIMELORD_H #define TIMELORD_H #include <utils/Timers.h> namespace android { namespace uirenderer { namespace renderthread { class RenderThread; // This class serves as a helper to filter & manage frame times from multiple sources // ensuring that time flows linearly and smoothly class TimeLord { public: void setFrameInterval(nsecs_t intervalNanos) { mFrameIntervalNanos = intervalNanos; } nsecs_t frameIntervalNanos() const { return mFrameIntervalNanos; } // returns true if the vsync is newer, false if it was rejected for staleness bool vsyncReceived(nsecs_t vsync); nsecs_t latestVsync() { return mFrameTimeNanos; } nsecs_t computeFrameTimeMs(); nsecs_t computeFrameTimeNanos(); private: friend class RenderThread; TimeLord(); ~TimeLord() {} nsecs_t mFrameIntervalNanos; nsecs_t mFrameTimeNanos; }; } /* namespace renderthread */ } /* namespace uirenderer */ } /* namespace android */ #endif /* TIMELORD_H */