1// Copyright (c) 2011 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5// This class chooses a capture interval so as to limit CPU usage to not exceed 6// a specified %age. It bases this on the CPU usage of recent capture and encode 7// operations, and on the number of available CPUs. 8 9#ifndef REMOTING_HOST_CAPTURE_SCHEDULER_H_ 10#define REMOTING_HOST_CAPTURE_SCHEDULER_H_ 11 12#include "base/time/time.h" 13#include "remoting/base/running_average.h" 14 15namespace remoting { 16 17class CaptureScheduler { 18 public: 19 CaptureScheduler(); 20 ~CaptureScheduler(); 21 22 // Returns the time to wait after initiating a capture before triggering 23 // the next. 24 base::TimeDelta NextCaptureDelay(); 25 26 // Records time spent on capturing and encoding. 27 void RecordCaptureTime(base::TimeDelta capture_time); 28 void RecordEncodeTime(base::TimeDelta encode_time); 29 30 // Sets minimum interval between frames. 31 void set_minimum_interval(base::TimeDelta minimum_interval) { 32 minimum_interval_ = minimum_interval; 33 } 34 35 // Overrides the number of processors for testing. 36 void SetNumOfProcessorsForTest(int num_of_processors); 37 38 private: 39 base::TimeDelta minimum_interval_; 40 int num_of_processors_; 41 RunningAverage capture_time_; 42 RunningAverage encode_time_; 43 44 DISALLOW_COPY_AND_ASSIGN(CaptureScheduler); 45}; 46 47} // namespace remoting 48 49#endif // REMOTING_HOST_CAPTURE_SCHEDULER_H_ 50