1/*
2 *  Copyright (c) 2013 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#ifndef WEBRTC_VIDEO_ENGINE_TEST_COMMON_STATISTICS_H_
11#define WEBRTC_VIDEO_ENGINE_TEST_COMMON_STATISTICS_H_
12
13#include "webrtc/typedefs.h"
14
15namespace webrtc {
16namespace test {
17
18class Statistics {
19 public:
20  Statistics();
21
22  void AddSample(double sample);
23
24  double Mean() const;
25  double Variance() const;
26  double StandardDeviation() const;
27
28 private:
29  double sum_;
30  double sum_squared_;
31  uint64_t count_;
32};
33}  // namespace test
34}  // namespace webrtc
35
36#endif  // WEBRTC_VIDEO_ENGINE_TEST_COMMON_STATISTICS_H_
37