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_TEST_STATISTICS_H_ 11 #define WEBRTC_TEST_STATISTICS_H_ 12 13 #include "webrtc/typedefs.h" 14 15 namespace webrtc { 16 namespace test { 17 18 class 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_TEST_STATISTICS_H_ 37
