blob: 49c42c4ed4be30ec234dca08aaa0ef65f51e38c9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_VIDEO_CODING_UTILITY_MOVING_AVERAGE_H_
#define WEBRTC_MODULES_VIDEO_CODING_UTILITY_MOVING_AVERAGE_H_
#include <list>
#include "webrtc/typedefs.h"
namespace webrtc {
template<class T>
class MovingAverage {
public:
MovingAverage();
void AddSample(T sample);
bool GetAverage(size_t num_samples, T* average);
void Reset();
int size();
private:
T sum_;
std::list<T> samples_;
};
template<class T>
MovingAverage<T>::MovingAverage() : sum_(static_cast<T>(0)) {
}
template<class T>
void MovingAverage<T>::AddSample(T sample) {
samples_.push_back(sample);
sum_ += sample;
}
template<class T>
bool MovingAverage<T>::GetAverage(size_t num_samples, T* avg) {
if (num_samples > samples_.size())
return false;
// Remove old samples.
while (num_samples < samples_.size()) {
sum_ -= samples_.front();
samples_.pop_front();
}
*avg = sum_ / static_cast<T>(num_samples);
return true;
}
template<class T>
void MovingAverage<T>::Reset() {
sum_ = static_cast<T>(0);
samples_.clear();
}
template<class T>
int MovingAverage<T>::size() {
return samples_.size();
}
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_CODING_MOVING_AVERAGE_SCALER_H_
|
