5908c71128
Trying to submit all changes at once proved impossible since there were too many changes in too many files. The changes to PRESUBMIT.py will be uploaded in the last CL. (original CL: https://codereview.webrtc.org/1528503003/) BUG=webrtc:5309 TBR=mflodman@webrtc.org Review URL: https://codereview.webrtc.org/1540243002 Cr-Commit-Position: refs/heads/master@{#11105}
72 lines
1.6 KiB
C++
72 lines
1.6 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_VIDEO_CODING_UTILITY_MOVING_AVERAGE_H_
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#define WEBRTC_MODULES_VIDEO_CODING_UTILITY_MOVING_AVERAGE_H_
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#include <list>
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#include "webrtc/typedefs.h"
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namespace webrtc {
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template <class T>
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class MovingAverage {
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public:
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MovingAverage();
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void AddSample(T sample);
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bool GetAverage(size_t num_samples, T* average);
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void Reset();
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int size();
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private:
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T sum_;
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std::list<T> samples_;
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};
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template <class T>
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MovingAverage<T>::MovingAverage()
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: sum_(static_cast<T>(0)) {}
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template <class T>
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void MovingAverage<T>::AddSample(T sample) {
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samples_.push_back(sample);
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sum_ += sample;
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}
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template <class T>
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bool MovingAverage<T>::GetAverage(size_t num_samples, T* avg) {
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if (num_samples > samples_.size())
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return false;
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// Remove old samples.
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while (num_samples < samples_.size()) {
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sum_ -= samples_.front();
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samples_.pop_front();
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}
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*avg = sum_ / static_cast<T>(num_samples);
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return true;
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}
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template <class T>
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void MovingAverage<T>::Reset() {
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sum_ = static_cast<T>(0);
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samples_.clear();
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}
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template <class T>
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int MovingAverage<T>::size() {
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return samples_.size();
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}
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} // namespace webrtc
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#endif // WEBRTC_MODULES_VIDEO_CODING_UTILITY_MOVING_AVERAGE_H_
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