Make the BWE threshold adaptive.

webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream.cc

 /*
  *  Copyright (c) 2012 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 87 matching lines @@
                                              payload_size, &timestamp_delta,
                                              &time_delta, &size_delta)) {
     double timestamp_delta_ms = timestamp_delta * kTimestampToMs;
     estimator->estimator.Update(time_delta, timestamp_delta_ms, size_delta,
                                 estimator->detector.State());
     estimator->detector.Detect(estimator->estimator.offset(),
                                timestamp_delta_ms,
                                estimator->estimator.num_of_deltas(), now_ms);
   }
   if (estimator->detector.State() == kBwOverusing) {
-    uint32_t incoming_bitrate = incoming_bitrate_.Rate(now_ms);
+    uint32_t incoming_bitrate_bps = incoming_bitrate_.Rate(now_ms);
     if (prior_state != kBwOverusing ||
-        remote_rate_->TimeToReduceFurther(now_ms, incoming_bitrate)) {
+        remote_rate_->TimeToReduceFurther(now_ms, incoming_bitrate_bps)) {
       // The first overuse should immediately trigger a new estimate.
       // We also have to update the estimate immediately if we are overusing
       // and the target bitrate is too high compared to what we are receiving.
       UpdateEstimate(now_ms);
     }
   }
 }
 
 int32_t RemoteBitrateEstimatorSingleStream::Process() {
   if (TimeUntilNextProcess() > 0) {
@@ skipping 44 matching lines @@
   // We can't update the estimate if we don't have any active streams.
   if (overuse_detectors_.empty()) {
     remote_rate_.reset(new AimdRateControl(remote_rate_->GetMinBitrate()));
     return;
   }
   double mean_noise_var = sum_var_noise /
       static_cast<double>(overuse_detectors_.size());
   const RateControlInput input(bw_state,
                                incoming_bitrate_.Rate(now_ms),
                                mean_noise_var);
-  const RateControlRegion region = remote_rate_->Update(&input, now_ms);
+  remote_rate_->Update(&input, now_ms);
   unsigned int target_bitrate = remote_rate_->UpdateBandwidthEstimate(now_ms);
   if (remote_rate_->ValidEstimate()) {
     process_interval_ms_ = remote_rate_->GetFeedbackInterval();
     std::vector<unsigned int> ssrcs;
     GetSsrcs(&ssrcs);
     observer_->OnReceiveBitrateChanged(ssrcs, target_bitrate);
   }
-  for (it = overuse_detectors_.begin(); it != overuse_detectors_.end(); ++it) {
-    it->second->detector.SetRateControlRegion(region);
-  }
 }
 
 void RemoteBitrateEstimatorSingleStream::OnRttUpdate(int64_t rtt) {
   CriticalSectionScoped cs(crit_sect_.get());
   remote_rate_->SetRtt(rtt);
 }
 
 void RemoteBitrateEstimatorSingleStream::RemoveStream(unsigned int ssrc) {
   CriticalSectionScoped cs(crit_sect_.get());
   SsrcOveruseEstimatorMap::iterator it = overuse_detectors_.find(ssrc);
@@ skipping 30 matching lines @@
   assert(ssrcs);
   ssrcs->resize(overuse_detectors_.size());
   int i = 0;
   for (SsrcOveruseEstimatorMap::const_iterator it = overuse_detectors_.begin();
       it != overuse_detectors_.end(); ++it, ++i) {
     (*ssrcs)[i] = it->first;
   }
 }
 
 }  // namespace webrtc