Added -show_detector_state which show the detector state in the total bitrate graph.

webrtc/tools/event_log_visualizer/plot_python.cc

Index: webrtc/tools/event_log_visualizer/plot_python.cc
diff --git a/webrtc/tools/event_log_visualizer/plot_python.cc b/webrtc/tools/event_log_visualizer/plot_python.cc
index 59270a0b9516d53abe98e092d63dfb240ae34461..b408d808ca19457c6b67620d040f70ebbc06060c 100644
--- a/webrtc/tools/event_log_visualizer/plot_python.cc
+++ b/webrtc/tools/event_log_visualizer/plot_python.cc
@@ -74,6 +74,8 @@ void PythonPlot::Draw() {
         printf("y%zu = [v for dup in y%zu for v in [dup, dup]]\n", i, i);
         printf(
             "plt.plot(x%zu[1:], y%zu[:-1], color=rgb_colors[%zu], "
+            "path_effects=[pe.Stroke(linewidth=2, foreground='black'), "
+            "pe.Normal()], "
             "label=\'%s\')\n",
             i, i, i, series_list_[i].label.c_str());
       } else if (series_list_[i].style == DOT_GRAPH) {
@@ -81,6 +83,10 @@ void PythonPlot::Draw() {
             "plt.plot(x%zu, y%zu, color=rgb_colors[%zu], label=\'%s\', "
             "marker='o', ls=' ')\n",
             i, i, i, series_list_[i].label.c_str());
+      } else if (series_list_[i].style == VSPAN_GRAPH) {
+        printf("for i in range(0, %zu, 2):\n", series_list_[i].points.size());
+        printf("  plt.axvspan(x%zu[i], x%zu[i+1], facecolor='%s', alpha=0.3)\n",
+               i, i, series_list_[i].color.c_str());
       } else {
         printf("raise Exception(\"Unknown graph type\")\n");
       }
@@ -103,6 +109,7 @@ PythonPlotCollection::~PythonPlotCollection() {}
 
 void PythonPlotCollection::Draw() {
   printf("import matplotlib.pyplot as plt\n");
+  printf("import matplotlib.patheffects as pe\n");
   printf("import colorsys\n");
   for (size_t i = 0; i < plots_.size(); i++) {
     printf("plt.figure(%zu)\n", i);