text: /*
   *  Copyright (c) 2019 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_NS_PRIOR_SIGNAL_MODEL_ESTIMATOR_H_
  #define MODULES_AUDIO_PROCESSING_NS_PRIOR_SIGNAL_MODEL_ESTIMATOR_H_
  
  #include "modules/audio_processing/ns/histograms.h"
  #include "modules/audio_processing/ns/prior_signal_model.h"
  
  namespace webrtc {
  
  // Estimator of the prior signal model parameters.
  class PriorSignalModelEstimator {
   public:
    explicit PriorSignalModelEstimator(float lrt_initial_value);
    PriorSignalModelEstimator(const PriorSignalModelEstimator&) = delete;
    PriorSignalModelEstimator& operator=(const PriorSignalModelEstimator&) =
        delete;
  
    // Updates the model estimate.
    void Update(const Histograms& h);
  
    // Returns the estimated model.
    const PriorSignalModel& get_prior_model() const { return prior_model_; }
  
   private:
    PriorSignalModel prior_model_;
  };
  
  }  // namespace webrtc
  
  #endif  // MODULES_AUDIO_PROCESSING_NS_PRIOR_SIGNAL_MODEL_ESTIMATOR_H_
  