commit b0c1b4e24d5250f3d9def9ccc3300e9a1237953f
author asapersson <asapersson@webrtc.org> Sat Sep 17 08:00:01 2016
committer Commit bot <commit-bot@chromium.org> Sat Sep 17 08:00:04 2016
tree abf4335598326b0d4e69c1acc88fe563212e0e00
parent e5835f5d849f49eed7a3bf8d1455688a93149324

Do not update stream synchronization if no new video packet has been received since last update (e.g. video muted).

BUG=

Review-Url: https://codereview.webrtc.org/2334113004
Cr-Commit-Position: refs/heads/master@{#14271}

webrtc/video/rtp_streams_synchronizer.cc

diff --git a/webrtc/video/rtp_streams_synchronizer.cc b/webrtc/video/rtp_streams_synchronizer.cc
index 75dd8cd..885dad3 100644
--- a/webrtc/video/rtp_streams_synchronizer.cc
+++ b/webrtc/video/rtp_streams_synchronizer.cc
@@ -123,6 +123,7 @@
   const int current_audio_delay_ms = audio_jitter_buffer_delay_ms +
       playout_buffer_delay_ms;
 
+  int64_t last_video_receive_ms = video_measurement_.latest_receive_time_ms;
   if (UpdateMeasurements(&video_measurement_, video_rtp_rtcp_,
                          video_rtp_receiver_) != 0) {
     return;
@@ -133,6 +134,11 @@
     return;
   }
 
+  if (last_video_receive_ms == video_measurement_.latest_receive_time_ms) {
+    // No new video packet has been received since last update.
+    return;
+  }
+
   int relative_delay_ms;
   // Calculate how much later or earlier the audio stream is compared to video.
   if (!sync_->ComputeRelativeDelay(audio_measurement_, video_measurement_,