Ignore inter-frame delay stats samples when stream is inactive

webrtc/video/video_receive_stream.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 510 matching lines @@
     RTC_DCHECK_EQ(res, video_coding::FrameBuffer::ReturnReason::kTimeout);
     int64_t now_ms = clock_->TimeInMilliseconds();
     rtc::Optional<int64_t> last_packet_ms =
         rtp_video_stream_receiver_.LastReceivedPacketMs();
     rtc::Optional<int64_t> last_keyframe_packet_ms =
         rtp_video_stream_receiver_.LastReceivedKeyframePacketMs();
 
     // To avoid spamming keyframe requests for a stream that is not active we
     // check if we have received a packet within the last 5 seconds.
     bool stream_is_active = last_packet_ms && now_ms - *last_packet_ms < 5000;
+    if (!stream_is_active)
+      stats_proxy_.OnStreamInactive();
 
     // If we recently have been receiving packets belonging to a keyframe then
     // we assume a keyframe is currently being received.
     bool receiving_keyframe =
         last_keyframe_packet_ms &&
         now_ms - *last_keyframe_packet_ms < kMaxWaitForKeyFrameMs;
 
     if (stream_is_active && !receiving_keyframe) {
       LOG(LS_WARNING) << "No decodable frame in " << wait_ms
                       << " ms, requesting keyframe.";
       RequestKeyFrame();
     }
   }
   return true;
 }
 }  // namespace internal
 }  // namespace webrtc