Make overuse estimator one dimensional.

webrtc/modules/remote_bitrate_estimator/overuse_estimator.h

 /*
  *  Copyright (c) 2013 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 WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_
 #define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_
 
 #include <list>
 
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/common_types.h"
 #include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h"
 
 namespace webrtc {
 
 class OveruseEstimator {
  public:
-  explicit OveruseEstimator(const OverUseDetectorOptions& options);
+  OveruseEstimator();
   ~OveruseEstimator();
 
   // Update the estimator with a new sample. The deltas should represent deltas
   // between timestamp groups as defined by the InterArrival class.
   // |current_hypothesis| should be the hypothesis of the over-use detector at
   // this time.
-  void Update(int64_t t_delta, double ts_delta, int size_delta,
+  void Update(double recv_delta_ms,
+              double send_delta_ms,
               BandwidthUsage current_hypothesis);
 
   // Returns the estimated noise/jitter variance in ms^2.
   double var_noise() const {
     return var_noise_;
   }
 
   // Returns the estimated inter-arrival time delta offset in ms.
   double offset() const {
     return offset_;
   }
 
   // Returns the number of deltas which the current over-use estimator state is
   // based on.
   unsigned int num_of_deltas() const {
     return num_of_deltas_;
   }
 
  private:
-  double UpdateMinFramePeriod(double ts_delta);
-  void UpdateNoiseEstimate(double residual, double ts_delta, bool stable_state);
+  double UpdateMinFramePeriod(double send_delta_ms);
+  void UpdateNoiseEstimate(double residual,
+                           double send_delta_ms,
+                           bool stable_state);
 
   // Must be first member variable. Cannot be const because we need to be
   // copyable.
-  OverUseDetectorOptions options_;
   uint16_t num_of_deltas_;
-  double slope_;
   double offset_;
   double prev_offset_;
-  double E_[2][2];
-  double process_noise_[2];
+  double e_;
+  double process_noise_;
   double avg_noise_;
   double var_noise_;
-  std::list<double> ts_delta_hist_;
+  std::list<double> send_delta_history_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(OveruseEstimator);
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_