Make the BWE threshold adaptive.

webrtc/modules/remote_bitrate_estimator/mimd_rate_control.cc

 /*
  *  Copyright (c) 2014 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 75 matching lines @@
   if (now_ms - time_of_last_log_ > kLogIntervalMs) {
     time_of_last_log_ = now_ms;
   }
   return current_bit_rate_;
 }
 
 void MimdRateControl::SetRtt(int64_t rtt) {
   rtt_ = rtt;
 }
 
-RateControlRegion MimdRateControl::Update(const RateControlInput* input,
-                                          int64_t now_ms) {
+void MimdRateControl::Update(const RateControlInput* input, int64_t now_ms) {
   assert(input);
 
   // Set the initial bit rate value to what we're receiving the first half
   // second.
   if (!initialized_bit_rate_) {
     if (time_first_incoming_estimate_ < 0) {
       if (input->_incomingBitRate > 0) {
         time_first_incoming_estimate_ = now_ms;
       }
     } else if (now_ms - time_first_incoming_estimate_ > 500 &&
                input->_incomingBitRate > 0) {
       current_bit_rate_ = input->_incomingBitRate;
       initialized_bit_rate_ = true;
     }
   }
 
   if (updated_ && current_input_._bwState == kBwOverusing) {
     // Only update delay factor and incoming bit rate. We always want to react
     // on an over-use.
     current_input_._noiseVar = input->_noiseVar;
     current_input_._incomingBitRate = input->_incomingBitRate;
-    return rate_control_region_;
+    return;
   }
   updated_ = true;
   current_input_ = *input;
-  return rate_control_region_;
 }
 
 void MimdRateControl::SetEstimate(int bitrate_bps, int64_t now_ms) {
 }
 
 uint32_t MimdRateControl::ChangeBitRate(uint32_t current_bit_rate,
                                         uint32_t incoming_bit_rate,
                                         double noise_var,
                                         int64_t now_ms) {
   if (!updated_) {
@@ skipping 185 matching lines @@
     default:
       assert(false);
   }
 }
 
 void MimdRateControl::ChangeState(RateControlState new_state) {
   came_from_state_ = rate_control_state_;
   rate_control_state_ = new_state;
 }
 }  // namespace webrtc