Enable the bayesian bitrate estimator by default.

webrtc/modules/congestion_controller/delay_based_bwe.cc

 /*
  *  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.
  */
 
@@ skipping 34 matching lines @@
 constexpr size_t kDefaultTrendlineWindowSize = 15;
 constexpr double kDefaultTrendlineSmoothingCoeff = 0.9;
 constexpr double kDefaultTrendlineThresholdGain = 4.0;
 
 // Parameters for Theil-Sen robust fitting of line to noisy data.
 constexpr size_t kDefaultMedianSlopeWindowSize = 20;
 constexpr double kDefaultMedianSlopeThresholdGain = 4.0;
 
 constexpr int kMaxConsecutiveFailedLookups = 5;
 
-const char kBitrateEstimateExperiment[] = "WebRTC-ImprovedBitrateEstimate";
 const char kBweTrendlineFilterExperiment[] = "WebRTC-BweTrendlineFilter";
 const char kBweMedianSlopeFilterExperiment[] = "WebRTC-BweMedianSlopeFilter";
 
-bool BitrateEstimateExperimentIsEnabled() {
-  return webrtc::field_trial::IsEnabled(kBitrateEstimateExperiment);
-}
-
 bool TrendlineFilterExperimentIsEnabled() {
   std::string experiment_string =
       webrtc::field_trial::FindFullName(kBweTrendlineFilterExperiment);
   // The experiment is enabled iff the field trial string begins with "Enabled".
   return experiment_string.find("Enabled") == 0;
 }
 
 bool MedianSlopeFilterExperimentIsEnabled() {
   std::string experiment_string =
       webrtc::field_trial::FindFullName(kBweMedianSlopeFilterExperiment);
@@ skipping 73 matching lines @@
 }
 }  // namespace
 
 namespace webrtc {
 
 DelayBasedBwe::BitrateEstimator::BitrateEstimator()
     : sum_(0),
       current_win_ms_(0),
       prev_time_ms_(-1),
       bitrate_estimate_(-1.0f),
-      bitrate_estimate_var_(50.0f),
-      old_estimator_(kBitrateWindowMs, 8000),
-      in_experiment_(BitrateEstimateExperimentIsEnabled()) {}
+      bitrate_estimate_var_(50.0f) {}
 
 void DelayBasedBwe::BitrateEstimator::Update(int64_t now_ms, int bytes) {
-  if (!in_experiment_) {
-    old_estimator_.Update(bytes, now_ms);
-    rtc::Optional<uint32_t> rate = old_estimator_.Rate(now_ms);
-    bitrate_estimate_ = -1.0f;
-    if (rate)
-      bitrate_estimate_ = *rate / 1000.0f;
-    return;
-  }
   int rate_window_ms = kRateWindowMs;
   // We use a larger window at the beginning to get a more stable sample that
   // we can use to initialize the estimate.
   if (bitrate_estimate_ < 0.f)
     rate_window_ms = kInitialRateWindowMs;
   float bitrate_sample = UpdateWindow(now_ms, bytes, rate_window_ms);
   if (bitrate_sample < 0.0f)
     return;
   if (bitrate_estimate_ < 0.0f) {
     // This is the very first sample we get. Use it to initialize the estimate.
@@ skipping 300 matching lines @@
 void DelayBasedBwe::SetMinBitrate(int min_bitrate_bps) {
   // Called from both the configuration thread and the network thread. Shouldn't
   // be called from the network thread in the future.
   rate_control_.SetMinBitrate(min_bitrate_bps);
 }
 
 int64_t DelayBasedBwe::GetProbingIntervalMs() const {
   return probing_interval_estimator_.GetIntervalMs();
 }
 }  // namespace webrtc