New simulators to test BWE at low bitrates (15-50kbps range).

webrtc/modules/remote_bitrate_estimator/bwe_simulations.cc

 /*
  *  Copyright (c) 2014 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 160 matching lines @@
   PacketReceiver receiver(&uplink_, 0, GetParam(), true, true);
   filter.set_capacity_kbps(200);
   filter.set_max_delay_ms(500);
   RunFor(60 * 1000);
   filter.set_capacity_kbps(30);
   RunFor(60 * 1000);
   filter.set_capacity_kbps(200);
   RunFor(60 * 1000);
 }
 
+TEST_P(BweSimulation, PacerChoke50kbps15kbps50kbps) {
+  AdaptiveVideoSource source(0, 30, 300, 0, 0);
+  PacedVideoSender sender(&uplink_, &source, GetParam());
+  ChokeFilter filter(&uplink_, 0);
+  RateCounterFilter counter(&uplink_, 0, "Receiver", bwe_names[GetParam()]);
+  PacketReceiver receiver(&uplink_, 0, GetParam(), true, true);
+  filter.set_capacity_kbps(50);
+  filter.set_max_delay_ms(500);
+  RunFor(60 * 1000);
+  filter.set_capacity_kbps(15);
+  RunFor(60 * 1000);
+  filter.set_capacity_kbps(50);
+  RunFor(60 * 1000);
+}
+
+TEST_P(BweSimulation, Choke50kbps15kbps50kbps) {
+  AdaptiveVideoSource source(0, 30, 300, 0, 0);
+  VideoSender sender(&uplink_, &source, GetParam());
+  ChokeFilter filter(&uplink_, 0);
+  RateCounterFilter counter(&uplink_, 0, "Receiver", bwe_names[GetParam()]);
+  PacketReceiver receiver(&uplink_, 0, GetParam(), true, true);
+  filter.set_capacity_kbps(50);
+  filter.set_max_delay_ms(500);
+  RunFor(60 * 1000);
+  filter.set_capacity_kbps(15);
+  RunFor(60 * 1000);
+  filter.set_capacity_kbps(50);
+  RunFor(60 * 1000);
+}
+
 TEST_P(BweSimulation, GoogleWifiTrace3Mbps) {
   AdaptiveVideoSource source(0, 30, 300, 0, 0);
   VideoSender sender(&uplink_, &source, GetParam());
   RateCounterFilter counter1(&uplink_, 0, "sender_output",
                              bwe_names[GetParam()]);
   TraceBasedDeliveryFilter filter(&uplink_, 0, "link_capacity");
   filter.set_max_delay_ms(500);
   RateCounterFilter counter2(&uplink_, 0, "Receiver", bwe_names[GetParam()]);
   PacketReceiver receiver(&uplink_, 0, GetParam(), true, true);
   ASSERT_TRUE(filter.Init(test::ResourcePath("google-wifi-3mbps", "rx")));
@@ skipping 264 matching lines @@
   RunChoke(GetParam(), capacities_kbps);
 
   BweTest gcc_test(false);
   gcc_test.RunChoke(kSendSideEstimator, capacities_kbps);
 }
 
 }  // namespace bwe
 }  // namespace testing
 }  // namespace webrtc