Video/Screenshare loopback tool.

webrtc/modules/congestion_controller/probe_controller.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 245 matching lines @@
       min_bitrate_to_probe_further_bps_ = kExponentialProbingDisabled;
     }
   }
 
   if (state_ != State::kProbingComplete || !enable_periodic_alr_probing_)
     return;
 
   // Probe bandwidth periodically when in ALR state.
   rtc::Optional<int64_t> alr_start_time =
       pacer_->GetApplicationLimitedRegionStartTime();
+  if (!in_alr && alr_start_time) {
+    in_alr = true;
+    Print("Enter ALR: %ld", *alr_start_time);
+  } else if (in_alr && !alr_start_time) {
+    in_alr = false;
+    Print("Exit ALR");
+  }
+
   if (alr_start_time && estimated_bitrate_bps_ > 0) {
     int64_t next_probe_time_ms =
         std::max(*alr_start_time, time_last_probing_initiated_ms_) +
         kAlrPeriodicProbingIntervalMs;
     if (now_ms >= next_probe_time_ms) {
       InitiateProbing(now_ms, {estimated_bitrate_bps_ * 2}, true);
     }
   }
 }
 
@@ skipping 16 matching lines @@
     state_ = State::kWaitingForProbingResult;
     min_bitrate_to_probe_further_bps_ =
         (*(bitrates_to_probe.end() - 1)) * kRepeatedProbeMinPercentage / 100;
   } else {
     state_ = State::kProbingComplete;
     min_bitrate_to_probe_further_bps_ = kExponentialProbingDisabled;
   }
 }
 
 }  // namespace webrtc