Move SimulatedNetworkConfig on top level.

Make SimulatedNetwrokConfig configuration of default implementation of
NetworkSimulationInterface, that will be used by WebRTC in case of
network simulation.

Bug: webrtc:9630
Change-Id: Ib7c3d0c69fc09627f3d8694e61ac8409101e8392
Reviewed-on: https://webrtc-review.googlesource.com/94154
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24311}

api/test/simulated_network.h

@@ -42,27 +42,32 @@ struct PacketDeliveryInfo {
   uint64_t packet_id;
 };
 
+// DefaultNetworkSimulationConfig is a default network simulation configuration
+// for default network simulation that will be used by WebRTC if no custom
+// NetworkSimulationInterface is provided.
+struct DefaultNetworkSimulationConfig {
+  DefaultNetworkSimulationConfig() {}
+  // Queue length in number of packets.
+  size_t queue_length_packets = 0;
+  // Delay in addition to capacity induced delay.
+  int queue_delay_ms = 0;
+  // Standard deviation of the extra delay.
+  int delay_standard_deviation_ms = 0;
+  // Link capacity in kbps.
+  int link_capacity_kbps = 0;
+  // Random packet loss.
+  int loss_percent = 0;
+  // If packets are allowed to be reordered.
+  bool allow_reordering = false;
+  // The average length of a burst of lost packets.
+  int avg_burst_loss_length = -1;
+};
+
 class NetworkSimulationInterface {
  public:
-  // TODO(phoglund): this one shouldn't really be here; make fake network pipes
-  // injectable instead in the video quality test fixture.
-  struct SimulatedNetworkConfig {
-    SimulatedNetworkConfig() {}
-    // Queue length in number of packets.
-    size_t queue_length_packets = 0;
-    // Delay in addition to capacity induced delay.
-    int queue_delay_ms = 0;
-    // Standard deviation of the extra delay.
-    int delay_standard_deviation_ms = 0;
-    // Link capacity in kbps.
-    int link_capacity_kbps = 0;
-    // Random packet loss.
-    int loss_percent = 0;
-    // If packets are allowed to be reordered.
-    bool allow_reordering = false;
-    // The average length of a burst of lost packets.
-    int avg_burst_loss_length = -1;
-  };
+  // DO NOT USE. Use DefaultNetworkSimulationConfig directly. This reference
+  // should be removed when all users will be switched on direct usage.
+  using SimulatedNetworkConfig = DefaultNetworkSimulationConfig;
 
   // DO NOT USE. Method added temporary for further refactoring and will be
   // removed soon.

api/test/video_quality_test_fixture.h

@@ -79,7 +79,7 @@ class VideoQualityTestFixtureInterface {
       std::string graph_data_output_filename;
       std::string graph_title;
     } analyzer;
-    NetworkSimulationInterface::SimulatedNetworkConfig pipe;
+    DefaultNetworkSimulationConfig pipe;
     struct SS {                          // Spatial scalability.
       std::vector<VideoStream> streams;  // If empty, one stream is assumed.
       size_t selected_stream;