link_capacity_estimator.h

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/*

 *  Copyright 2018 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_CONGESTION_CONTROLLER_GOOG_CC_LINK_CAPACITY_ESTIMATOR_H_

#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_LINK_CAPACITY_ESTIMATOR_H_

#include "absl/types/optional.h"

#include "api/units/data_rate.h"

namespace webrtc {

class LinkCapacityEstimator {

 public:

  LinkCapacityEstimator();

  DataRate UpperBound() const;

  DataRate LowerBound() const;

  void Reset();

  void OnOveruseDetected(DataRate acknowledged_rate);

  void OnProbeRate(DataRate probe_rate);

  bool has_estimate() const;

  DataRate estimate() const;

 private:

  friend class GoogCcStatePrinter;

  void Update(DataRate capacity_sample, double alpha);

  double deviation_estimate_kbps() const;

  absl::optional<double> estimate_kbps_;

  double deviation_kbps_ = 0.4;

};

}  // namespace webrtc

#endif  // MODULES_CONGESTION_CONTROLLER_GOOG_CC_LINK_CAPACITY_ESTIMATOR_H_