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

webrtc/tools/event_log_visualizer/analyzer.cc

Index: webrtc/tools/event_log_visualizer/analyzer.cc
diff --git a/webrtc/tools/event_log_visualizer/analyzer.cc b/webrtc/tools/event_log_visualizer/analyzer.cc
index 88ca33935f44a11a10afd67497cd7ef4f6a98fc5..94f02aa0518bd0c58e01e0db2e3fb0cf8b99b4c6 100644
--- a/webrtc/tools/event_log_visualizer/analyzer.cc
+++ b/webrtc/tools/event_log_visualizer/analyzer.cc
@@ -883,7 +883,8 @@ void EventLogAnalyzer::CreateFractionLossGraph(Plot* plot) {
 // Plot the total bandwidth used by all RTP streams.
 void EventLogAnalyzer::CreateTotalBitrateGraph(
     PacketDirection desired_direction,
-    Plot* plot) {
+    Plot* plot,
+    bool show_detector_state) {
   struct TimestampSize {
     TimestampSize(uint64_t t, size_t s) : timestamp(t), size(s) {}
     uint64_t timestamp;
@@ -943,14 +944,58 @@ void EventLogAnalyzer::CreateTotalBitrateGraph(
       loss_series.points.emplace_back(x, y);
     }
 
+    TimeSeries overusing_series("Overusing", VSPAN_GRAPH);
+    overusing_series.color = "#ff8e82";
+    TimeSeries underusing_series("Underusing", VSPAN_GRAPH);
+    underusing_series.color = "#5092fc";
+    TimeSeries normal_series("Normal", VSPAN_GRAPH);
+    normal_series.color = "#c4ffc4";
+    normal_series.points.emplace_back(0, 0);
     TimeSeries delay_series("Delay-based estimate", LINE_STEP_GRAPH);
+    TimeSeries* last_series = &normal_series;
+    BandwidthUsage detector_state = BandwidthUsage::kBwNormal;
+
     for (auto& delay_update : bwe_delay_updates_) {
       float x =
           static_cast<float>(delay_update.timestamp - begin_time_) / 1000000;
       float y = static_cast<float>(delay_update.bitrate_bps) / 1000;
+
+      if (detector_state != delay_update.detector_state) {
+        RTC_CHECK(last_series);
+        last_series->points.emplace_back(x, 0);
+        last_series = nullptr;
+      }
+
+      switch (delay_update.detector_state) {
+        case BandwidthUsage::kBwNormal:
+          if (detector_state != BandwidthUsage::kBwNormal) {
+            normal_series.points.emplace_back(x, 0);
+            last_series = &normal_series;
+            detector_state = delay_update.detector_state;
+          }
+          break;
+        case BandwidthUsage::kBwUnderusing:
+          if (detector_state != BandwidthUsage::kBwUnderusing) {
+            underusing_series.points.emplace_back(x, 0);
+            last_series = &underusing_series;
+            detector_state = delay_update.detector_state;
+          }
+          break;
+        case BandwidthUsage::kBwOverusing:
+          if (detector_state != BandwidthUsage::kBwOverusing) {
+            overusing_series.points.emplace_back(x, 0);
+            last_series = &overusing_series;
+            detector_state = delay_update.detector_state;
+          }
+          break;
+      }
+
       delay_series.points.emplace_back(x, y);
     }
 
+    RTC_CHECK(last_series);
+    last_series->points.emplace_back(end_time_, 0);
+
     TimeSeries created_series("Probe cluster created.", DOT_GRAPH);
     for (auto& cluster : bwe_probe_cluster_created_events_) {
       float x = static_cast<float>(cluster.timestamp - begin_time_) / 1000000;
@@ -966,6 +1011,14 @@ void EventLogAnalyzer::CreateTotalBitrateGraph(
         result_series.points.emplace_back(x, y);
       }
     }
+
+    if (show_detector_state) {
+      plot->AppendTimeSeries(std::move(underusing_series));
+      plot->AppendTimeSeries(std::move(normal_series));
+      plot->AppendTimeSeries(std::move(overusing_series));
+    }
+
+    plot->AppendTimeSeries(std::move(bitrate_series));
     plot->AppendTimeSeries(std::move(loss_series));
     plot->AppendTimeSeries(std::move(delay_series));
     plot->AppendTimeSeries(std::move(created_series));