Define a protobuf format for representing plots. Add code to convert the C-representation generated by the RtcEventLog analysis tool, to the new protobuf format.

BUG=webrtc:6249

NOTRY=True

Review-Url: https://codereview.webrtc.org/2268063002
Cr-Commit-Position: refs/heads/master@{#13873}

webrtc/tools/BUILD.gn

@@ -7,6 +7,7 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//testing/test.gni")
+import("//third_party/protobuf/proto_library.gni")
 import("../build/webrtc.gni")
 
 source_set("tools") {
@@ -175,12 +176,21 @@ source_set("agc_test_utils") {
 }
 
 if (rtc_enable_protobuf) {
+  proto_library("graph_proto") {
+    sources = [
+      "event_log_visualizer/graph.proto",
+    ]
+    proto_out_dir = "webrtc/tools/event_log_visualizer"
+  }
+
   source_set("event_log_visualizer_utils") {
     sources = [
       "event_log_visualizer/analyzer.cc",
       "event_log_visualizer/analyzer.h",
       "event_log_visualizer/plot_base.cc",
       "event_log_visualizer/plot_base.h",
+      "event_log_visualizer/plot_protobuf.cc",
+      "event_log_visualizer/plot_protobuf.h",
       "event_log_visualizer/plot_python.cc",
       "event_log_visualizer/plot_python.h",
     ]
@@ -201,6 +211,7 @@ if (rtc_enable_protobuf) {
       "//build/config/sanitizers:deps",
     ]
     public_deps = [
+      ":graph_proto",
       "../:rtc_event_log_parser",
     ]
   }

webrtc/tools/event_log_visualizer/graph.proto

@@ -0,0 +1,32 @@
+syntax = "proto2";
+option optimize_for = LITE_RUNTIME;
+package webrtc.protobuf_plot;
+
+enum PlotStyle {
+  UNDEFINED = 0;
+  LINE_GRAPH = 1;
+  LINE_DOT_GRAPH = 2;
+  BAR_GRAPH = 3;
+};
+
+message DataSet {
+  repeated float xvalues = 1;
+  repeated float yvalues = 2;
+  optional string label = 3;
+  optional PlotStyle style = 4;
+}
+
+message Plot {
+  repeated DataSet data_sets = 1;
+  optional float xaxis_min = 2;
+  optional float xaxis_max = 3;
+  optional string xaxis_label = 4;
+  optional float yaxis_min = 5;
+  optional float yaxis_max = 6;
+  optional string yaxis_label = 7;
+  optional string title = 8;
+}
+
+message PlotCollection {
+  repeated Plot plots = 1;
+}

webrtc/tools/event_log_visualizer/plot_protobuf.cc

@@ -0,0 +1,81 @@
+/*
+ *  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.
+ */
+
+#include "webrtc/tools/event_log_visualizer/plot_protobuf.h"
+
+#include <memory>
+
+namespace webrtc {
+namespace plotting {
+
+ProtobufPlot::ProtobufPlot() {}
+
+ProtobufPlot::~ProtobufPlot() {}
+
+void ProtobufPlot::Draw() {}
+
+void ProtobufPlot::ExportProtobuf(protobuf_plot::Plot* plot) {
+  for (size_t i = 0; i < series_list_.size(); i++) {
+    protobuf_plot::DataSet* data_set = plot->add_data_sets();
+    for (const auto& point : series_list_[i].points) {
+      data_set->add_xvalues(point.x);
+    }
+    for (const auto& point : series_list_[i].points) {
+      data_set->add_yvalues(point.y);
+    }
+
+    if (series_list_[i].style == BAR_GRAPH) {
+      data_set->set_style(protobuf_plot::BAR_GRAPH);
+    } else if (series_list_[i].style == LINE_GRAPH) {
+      data_set->set_style(protobuf_plot::LINE_GRAPH);
+    } else if (series_list_[i].style == LINE_DOT_GRAPH) {
+      data_set->set_style(protobuf_plot::LINE_DOT_GRAPH);
+    } else {
+      data_set->set_style(protobuf_plot::UNDEFINED);
+    }
+
+    data_set->set_label(series_list_[i].label);
+  }
+
+  plot->set_xaxis_min(xaxis_min_);
+  plot->set_xaxis_max(xaxis_max_);
+  plot->set_yaxis_min(yaxis_min_);
+  plot->set_yaxis_max(yaxis_max_);
+  plot->set_xaxis_label(xaxis_label_);
+  plot->set_yaxis_label(yaxis_label_);
+  plot->set_title(title_);
+}
+
+ProtobufPlotCollection::ProtobufPlotCollection() {}
+
+ProtobufPlotCollection::~ProtobufPlotCollection() {}
+
+void ProtobufPlotCollection::Draw() {}
+
+void ProtobufPlotCollection::ExportProtobuf(
+    protobuf_plot::PlotCollection* collection) {
+  for (const auto& plot : plots_) {
+    // TODO(terelius): Ensure that there is no way to insert plots other than
+    // ProtobufPlots in a ProtobufPlotCollection. Needed to safely static_cast
+    // here.
+    protobuf_plot::Plot* protobuf_representation = collection->add_plots();
+    static_cast<ProtobufPlot*>(plot.get())
+        ->ExportProtobuf(protobuf_representation);
+  }
+}
+
+Plot* ProtobufPlotCollection::AppendNewPlot() {
+  Plot* plot = new ProtobufPlot();
+  plots_.push_back(std::unique_ptr<Plot>(plot));
+  return plot;
+}
+
+}  // namespace plotting
+}  // namespace webrtc

webrtc/tools/event_log_visualizer/plot_protobuf.h

@@ -0,0 +1,39 @@
+/*
+ *  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.
+ */
+#ifndef WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PROTOBUF_H_
+#define WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PROTOBUF_H_
+
+#include "webrtc/tools/event_log_visualizer/graph.pb.h"
+#include "webrtc/tools/event_log_visualizer/plot_base.h"
+
+namespace webrtc {
+namespace plotting {
+
+class ProtobufPlot final : public Plot {
+ public:
+  ProtobufPlot();
+  ~ProtobufPlot() override;
+  void Draw() override;
+  void ExportProtobuf(protobuf_plot::Plot* plot);
+};
+
+class ProtobufPlotCollection final : public PlotCollection {
+ public:
+  ProtobufPlotCollection();
+  ~ProtobufPlotCollection() override;
+  void Draw() override;
+  Plot* AppendNewPlot() override;
+  void ExportProtobuf(protobuf_plot::PlotCollection* collection);
+};
+
+}  // namespace plotting
+}  // namespace webrtc
+
+#endif  // WEBRTC_TOOLS_EVENT_LOG_VISUALIZER_PLOT_PROTOBUF_H_

webrtc/tools/tools.gyp

@@ -101,6 +101,18 @@
   'conditions': [
     ['enable_protobuf==1', {
       'targets': [
+        {
+          'target_name': 'graph_proto',
+          'type': 'static_library',
+          'sources': [
+            'event_log_visualizer/graph.proto',
+          ],
+          'variables': {
+            'proto_in_dir': 'event_log_visualizer',
+            'proto_out_dir': 'webrtc/tools/event_log_visualizer',
+          },
+          'includes': ['../build/protoc.gypi'],
+        },
         {
           # RTC event log visualization library
           'target_name': 'event_log_visualizer_utils',
@@ -111,18 +123,22 @@
             '<(webrtc_root)/modules/modules.gyp:congestion_controller',
             '<(webrtc_root)/modules/modules.gyp:rtp_rtcp',
             '<(webrtc_root)/system_wrappers/system_wrappers.gyp:metrics_default',
+            ':graph_proto',
           ],
           'sources': [
             'event_log_visualizer/analyzer.cc',
             'event_log_visualizer/analyzer.h',
             'event_log_visualizer/plot_base.cc',
             'event_log_visualizer/plot_base.h',
+            'event_log_visualizer/plot_protobuf.cc',
+            'event_log_visualizer/plot_protobuf.h',
             'event_log_visualizer/plot_python.cc',
             'event_log_visualizer/plot_python.h',
           ],
-	  'export_dependent_settings': [
-	    '<(webrtc_root)/webrtc.gyp:rtc_event_log_parser',
-	  ],
+          'export_dependent_settings': [
+            '<(webrtc_root)/webrtc.gyp:rtc_event_log_parser',
+            ':graph_proto',
+          ],
         },
       ],
     }],