Add event log visualization of rtp timestamps over time.

webrtc/tools/event_log_visualizer/main.cc

 /*
  *  Copyright (c) 2016 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 41 matching lines @@
             "Run the bandwidth estimator with the logged rtp and rtcp and plot "
             "the output.");
 DEFINE_bool(plot_network_delay_feedback,
             false,
             "Compute network delay based on sent packets and the received "
             "transport feedback.");
 DEFINE_bool(plot_fraction_loss,
             false,
             "Plot packet loss in percent for outgoing packets (as perceived by "
             "the send-side bandwidth estimator).");
+DEFINE_bool(plot_timestamps,
+            false,
+            "Plot the rtp timestamps of all rtp and rtcp packets over time.");
 DEFINE_string(
     force_fieldtrials,
     "",
     "Field trials control experimental feature code which can be forced. "
     "E.g. running with --force_fieldtrials=WebRTC-FooFeature/Enabled/"
     " will assign the group Enabled to field trial WebRTC-FooFeature. Multiple "
     "trials are separated by \"/\"");
 
 int main(int argc, char* argv[]) {
   std::string program_name = argv[0];
@@ skipping 101 matching lines @@
   }
 
   if (FLAGS_plot_all || FLAGS_plot_bwe) {
     analyzer.CreateBweSimulationGraph(collection->AppendNewPlot());
   }
 
   if (FLAGS_plot_all || FLAGS_plot_network_delay_feedback) {
     analyzer.CreateNetworkDelayFeedbackGraph(collection->AppendNewPlot());
   }
 
+  if (FLAGS_plot_all || FLAGS_plot_timestamps) {
+    analyzer.CreateTimestampGraph(collection->AppendNewPlot());
+  }
+
   collection->Draw();
 
   return 0;
 }