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/*
* Copyright (c) 2016 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 MODULES_AUDIO_PROCESSING_ECHO_DETECTOR_MEAN_VARIANCE_ESTIMATOR_H_
#define MODULES_AUDIO_PROCESSING_ECHO_DETECTOR_MEAN_VARIANCE_ESTIMATOR_H_
namespace webrtc {
// This class iteratively estimates the mean and variance of a signal.
class MeanVarianceEstimator {
public:
void Update(float value);
float std_deviation() const;
float mean() const;
void Clear();
private:
// Estimate of the expected value of the input values.
float mean_ = 0.f;
// Estimate of the variance of the input values.
float variance_ = 0.f;
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_ECHO_DETECTOR_MEAN_VARIANCE_ESTIMATOR_H_
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