Line data    Source code

       1             : /*
       2             :  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
       3             :  *
       4             :  *  Use of this source code is governed by a BSD-style license
       5             :  *  that can be found in the LICENSE file in the root of the source
       6             :  *  tree. An additional intellectual property rights grant can be found
       7             :  *  in the file PATENTS.  All contributing project authors may
       8             :  *  be found in the AUTHORS file in the root of the source tree.
       9             :  */
      10             : 
      11             : #ifndef WEBRTC_MODULES_VIDEO_CODING_UTILITY_MOVING_AVERAGE_H_
      12             : #define WEBRTC_MODULES_VIDEO_CODING_UTILITY_MOVING_AVERAGE_H_
      13             : 
      14             : #include <vector>
      15             : 
      16             : #include "webrtc/base/optional.h"
      17             : 
      18             : namespace webrtc {
      19           0 : class MovingAverage {
      20             :  public:
      21             :   explicit MovingAverage(size_t s);
      22             :   void AddSample(int sample);
      23             :   rtc::Optional<int> GetAverage() const;
      24             :   rtc::Optional<int> GetAverage(size_t num_samples) const;
      25             :   void Reset();
      26             :   size_t size() const;
      27             : 
      28             :  private:
      29             :   size_t count_ = 0;
      30             :   int sum_ = 0;
      31             :   std::vector<int> sum_history_;
      32             : };
      33             : }  // namespace webrtc
      34             : 
      35             : #endif  // WEBRTC_MODULES_VIDEO_CODING_UTILITY_MOVING_AVERAGE_H_