Only update codec type histogram if lifetime is long enough (10 sec).

webrtc/video/send_statistics_proxy.cc

 /*
  *  Copyright (c) 2013 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 59 matching lines @@
 
 const int SendStatisticsProxy::kStatsTimeoutMs = 5000;
 
 SendStatisticsProxy::SendStatisticsProxy(
     Clock* clock,
     const VideoSendStream::Config& config,
     VideoEncoderConfig::ContentType content_type)
     : clock_(clock),
       config_(config),
       content_type_(content_type),
+      start_ms_(clock->TimeInMilliseconds()),
       last_sent_frame_timestamp_(0),
       encode_time_(kEncodeTimeWeigthFactor),
       uma_container_(
           new UmaSamplesContainer(GetUmaPrefix(content_type_), stats_, clock)) {
-  UpdateCodecTypeHistogram(config_.encoder_settings.payload_name);
 }
 
 SendStatisticsProxy::~SendStatisticsProxy() {
   rtc::CritScope lock(&crit_);
   uma_container_->UpdateHistograms(config_, stats_);
+
+  int64_t elapsed_sec = (clock_->TimeInMilliseconds() - start_ms_) / 1000;
+  RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Video.SendStreamLifetimeInSeconds",
+                                     elapsed_sec);
+
+  if (elapsed_sec >= metrics::kMinRunTimeInSeconds)
+    UpdateCodecTypeHistogram(config_.encoder_settings.payload_name);
 }
 
 SendStatisticsProxy::UmaSamplesContainer::UmaSamplesContainer(
     const char* prefix,
     const VideoSendStream::Stats& stats,
     Clock* const clock)
     : uma_prefix_(prefix),
       clock_(clock),
       max_sent_width_per_timestamp_(0),
       max_sent_height_per_timestamp_(0),
@@ skipping 527 matching lines @@
   return Fraction(min_required_samples, 1000.0f);
 }
 
 int SendStatisticsProxy::BoolSampleCounter::Fraction(
     int min_required_samples, float multiplier) const {
   if (num_samples < min_required_samples || num_samples == 0)
     return -1;
   return static_cast<int>((sum * multiplier / num_samples) + 0.5f);
 }
 }  // namespace webrtc