Only average positive quality stats.

webrtc/video/video_quality_test.cc

 /*
  *  Copyright (c) 2015 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.
  */
 #include <stdio.h>
@@ skipping 369 matching lines @@
     return static_cast<VideoAnalyzer*>(obj)->PollStats();
   }
 
   bool PollStats() {
     if (done_.Wait(kSendStatsPollingIntervalMs))
       return false;
 
     VideoSendStream::Stats stats = send_stream_->GetStats();
 
     rtc::CritScope crit(&comparison_lock_);
-    encode_frame_rate_.AddSample(stats.encode_frame_rate);
-    encode_time_ms.AddSample(stats.avg_encode_time_ms);
-    encode_usage_percent.AddSample(stats.encode_usage_percent);
-    media_bitrate_bps.AddSample(stats.media_bitrate_bps);
+    // It's not certain that we yet have estimates for any of these stats. Check
+    // that they are positive before mixing them in.
+    if (stats.encode_frame_rate > 0)
+      encode_frame_rate_.AddSample(stats.encode_frame_rate);
+    if (stats.avg_encode_time_ms > 0)
+      encode_time_ms.AddSample(stats.avg_encode_time_ms);
+    if (stats.encode_usage_percent > 0)
+      encode_usage_percent.AddSample(stats.encode_usage_percent);
+    if (stats.media_bitrate_bps > 0)
+      media_bitrate_bps.AddSample(stats.media_bitrate_bps);
 
     return true;
   }
 
   static bool FrameComparisonThread(void* obj) {
     return static_cast<VideoAnalyzer*>(obj)->CompareFrames();
   }
 
   bool CompareFrames() {
     if (AllFramesRecorded())
@@ skipping 683 matching lines @@
   video_send_stream_->Stop();
   receive_stream->Stop();
 
   call->DestroyVideoReceiveStream(receive_stream);
   call->DestroyVideoSendStream(video_send_stream_);
 
   transport.StopSending();
 }
 
 }  // namespace webrtc