Ignore inter-frame delay stats samples when stream is inactive

webrtc/video/receive_statistics_proxy.h

 /*
  *  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 40 matching lines @@
   void OnDecodedFrame(rtc::Optional<uint8_t> qp, VideoContentType content_type);
   void OnSyncOffsetUpdated(int64_t sync_offset_ms, double estimated_freq_khz);
   void OnRenderedFrame(const VideoFrame& frame);
   void OnIncomingPayloadType(int payload_type);
   void OnDecoderImplementationName(const char* implementation_name);
   void OnIncomingRate(unsigned int framerate, unsigned int bitrate_bps);
 
   void OnPreDecode(const EncodedImage& encoded_image,
                    const CodecSpecificInfo* codec_specific_info);
 
+  // Indicates video stream has been paused (no incoming packets).
+  void OnStreamInactive();
+
   // Overrides VCMReceiveStatisticsCallback.
   void OnReceiveRatesUpdated(uint32_t bitRate, uint32_t frameRate) override;
   void OnFrameCountsUpdated(const FrameCounts& frame_counts) override;
   void OnDiscardedPacketsUpdated(int discarded_packets) override;
   void OnCompleteFrame(bool is_keyframe, size_t size_bytes) override;
   void OnFrameBufferTimingsUpdated(int decode_ms,
                                    int max_decode_ms,
                                    int current_delay_ms,
                                    int target_delay_ms,
                                    int jitter_buffer_ms,
@@ skipping 82 matching lines @@
   int64_t interframe_delay_max_ms_video_  GUARDED_BY(crit_);
   int64_t interframe_delay_max_ms_screenshare_  GUARDED_BY(crit_);
   MaxCounter freq_offset_counter_ GUARDED_BY(crit_);
   int64_t first_report_block_time_ms_ GUARDED_BY(crit_);
   ReportBlockStats report_block_stats_ GUARDED_BY(crit_);
   QpCounters qp_counters_;  // Only accessed on the decoding thread.
   std::map<uint32_t, StreamDataCounters> rtx_stats_ GUARDED_BY(crit_);
   int64_t avg_rtt_ms_ GUARDED_BY(crit_);
   mutable std::map<int64_t, size_t> frame_window_ GUARDED_BY(&crit_);
   VideoContentType last_content_type_ GUARDED_BY(&crit_);
-  rtc::Optional<int64_t> last_decoded_frame_time_ms_;
+  rtc::Optional<int64_t> last_decoded_frame_time_ms_ GUARDED_BY(&crit_);
   rtc::Optional<TimingFrameInfo> timing_frame_info_ GUARDED_BY(&crit_);
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_VIDEO_RECEIVE_STATISTICS_PROXY_H_