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 15 namespace remoting { 16 17 class 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. set_minimum_interval(base::TimeDelta minimum_interval)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