Refactoring: move ownership of RtcEventLog from Call to PeerConnection

webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.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 57 matching lines @@
       time_last_decrease_ms_(0),
       first_report_time_ms_(-1),
       initially_lost_packets_(0),
       bitrate_at_2_seconds_kbps_(0),
       uma_update_state_(kNoUpdate),
       rampup_uma_stats_updated_(kNumUmaRampupMetrics, false),
       event_log_(event_log),
       last_rtc_event_log_ms_(-1),
       in_timeout_experiment_(webrtc::field_trial::FindFullName(
                                  "WebRTC-SendSideBwe") == "Enabled") {
-  RTC_DCHECK(event_log);
 }
 
 SendSideBandwidthEstimation::~SendSideBandwidthEstimation() {}
 
 void SendSideBandwidthEstimation::SetBitrates(int send_bitrate,
                                               int min_bitrate,
                                               int max_bitrate) {
   if (send_bitrate > 0)
     SetSendBitrate(send_bitrate);
   SetMinMaxBitrate(min_bitrate, max_bitrate);
@@ skipping 185 matching lines @@
                       << " ms), reducing bitrate.";
       bitrate_ *= 0.8;
       // Reset accumulators since we've already acted on missing feedback and
       // shouldn't to act again on these old lost packets.
       lost_packets_since_last_loss_update_Q8_ = 0;
       expected_packets_since_last_loss_update_ = 0;
       last_timeout_ms_ = now_ms;
     }
   }
   uint32_t capped_bitrate = CapBitrateToThresholds(now_ms, bitrate_);
-  if (capped_bitrate != bitrate_ ||
-      last_fraction_loss_ != last_logged_fraction_loss_ ||
-      last_rtc_event_log_ms_ == -1 ||
-      now_ms - last_rtc_event_log_ms_ > kRtcEventLogPeriodMs) {
+  if (event_log_ && (capped_bitrate != bitrate_ ||
+                     last_fraction_loss_ != last_logged_fraction_loss_ ||
+                     last_rtc_event_log_ms_ == -1 ||
+                     now_ms - last_rtc_event_log_ms_ > kRtcEventLogPeriodMs)) {
     event_log_->LogBwePacketLossEvent(capped_bitrate, last_fraction_loss_,
                                       expected_packets_since_last_loss_update_);
     last_logged_fraction_loss_ = last_fraction_loss_;
     last_rtc_event_log_ms_ = now_ms;
   }
   bitrate_ = capped_bitrate;
 }
 
 bool SendSideBandwidthEstimation::IsInStartPhase(int64_t now_ms) const {
   return first_report_time_ms_ == -1 ||
@@ skipping 37 matching lines @@
       LOG(LS_WARNING) << "Estimated available bandwidth " << bitrate / 1000
                       << " kbps is below configured min bitrate "
                       << min_bitrate_configured_ / 1000 << " kbps.";
       last_low_bitrate_log_ms_ = now_ms;
     }
     bitrate = min_bitrate_configured_;
   }
   return bitrate;
 }
 }  // namespace webrtc