Video/Screenshare loopback tool.

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 199 matching lines @@
 }
 
 DelayBasedBwe::Result DelayBasedBwe::MaybeUpdateEstimate(
     bool overusing,
     rtc::Optional<uint32_t> acked_bitrate_bps,
     bool recovered_from_overuse) {
   Result result;
   int64_t now_ms = clock_->TimeInMilliseconds();
 
   rtc::Optional<int> probe_bitrate_bps =
-      probe_bitrate_estimator_.FetchAndResetLastEstimatedBitrateBps();
+      probe_bitrate_estimator_.FetchAndResetLastEstimatedBitrateBps(50);
   // Currently overusing the bandwidth.
   if (overusing) {
     if (acked_bitrate_bps &&
         rate_control_.TimeToReduceFurther(now_ms, *acked_bitrate_bps)) {
       result.updated = UpdateEstimate(now_ms, acked_bitrate_bps, overusing,
                                       &result.target_bitrate_bps);
     } else if (!acked_bitrate_bps && rate_control_.ValidEstimate() &&
                rate_control_.TimeToReduceFurther(
                    now_ms, rate_control_.LatestEstimate() / 2 - 1)) {
       // Overusing before we have a measured acknowledged bitrate. We check
@@ skipping 11 matching lines @@
       result.probe = true;
       result.updated = true;
       result.target_bitrate_bps = *probe_bitrate_bps;
       rate_control_.SetEstimate(*probe_bitrate_bps, now_ms);
     } else {
       result.updated = UpdateEstimate(now_ms, acked_bitrate_bps, overusing,
                                       &result.target_bitrate_bps);
       result.recovered_from_overuse = recovered_from_overuse;
     }
   }
-  if (result.updated) {
+  if (result.updated || detector_.State() != last_logged_state_) {
     BWE_TEST_LOGGING_PLOT(1, "target_bitrate_bps", now_ms,
                           result.target_bitrate_bps);
     if (event_log_ && (result.target_bitrate_bps != last_logged_bitrate_ ||
                        detector_.State() != last_logged_state_)) {
-      event_log_->LogDelayBasedBweUpdate(result.target_bitrate_bps,
-                                         detector_.State());
-      last_logged_bitrate_ = result.target_bitrate_bps;
+      uint32_t bitrate_bps =
+          result.updated ? result.target_bitrate_bps : last_logged_bitrate_;
+      event_log_->LogDelayBasedBweUpdate(bitrate_bps, detector_.State());
+      if (result.target_bitrate_bps > 0)
+        last_logged_bitrate_ = result.target_bitrate_bps;
       last_logged_state_ = detector_.State();
     }
   }
   return result;
 }
 
 bool DelayBasedBwe::UpdateEstimate(int64_t now_ms,
                                    rtc::Optional<uint32_t> acked_bitrate_bps,
                                    bool overusing,
                                    uint32_t* target_bitrate_bps) {
@@ skipping 36 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::GetExpectedBwePeriodMs() const {
   return rate_control_.GetExpectedBandwidthPeriodMs();
 }
 }  // namespace webrtc