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/*
* Copyright (c) 2018 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 "modules/congestion_controller/pcc/pcc_network_controller.h"
#include <memory>
#include "api/environment/environment_factory.h"
#include "modules/congestion_controller/pcc/pcc_factory.h"
#include "test/gmock.h"
#include "test/gtest.h"
#include "test/scenario/scenario.h"
using ::testing::AllOf;
using ::testing::Field;
using ::testing::Ge;
using ::testing::Le;
using ::testing::Matcher;
using ::testing::Property;
namespace webrtc {
namespace test {
namespace {
const DataRate kInitialBitrate = DataRate::KilobitsPerSec(60);
const Timestamp kDefaultStartTime = Timestamp::Millis(10000000);
constexpr double kDataRateMargin = 0.20;
constexpr double kMinDataRateFactor = 1 - kDataRateMargin;
constexpr double kMaxDataRateFactor = 1 + kDataRateMargin;
inline Matcher<TargetTransferRate> TargetRateCloseTo(DataRate rate) {
DataRate min_data_rate = rate * kMinDataRateFactor;
DataRate max_data_rate = rate * kMaxDataRateFactor;
return Field(&TargetTransferRate::target_rate,
AllOf(Ge(min_data_rate), Le(max_data_rate)));
}
} // namespace
TEST(PccNetworkControllerTest, SendsConfigurationOnFirstProcess) {
Environment env = CreateEnvironment();
NetworkControllerConfig config(env);
config.constraints.at_time = kDefaultStartTime;
config.constraints.min_data_rate = DataRate::Zero();
config.constraints.max_data_rate = 5 * kInitialBitrate;
config.constraints.starting_rate = kInitialBitrate;
pcc::PccNetworkController controller(config);
NetworkControlUpdate update =
controller.OnProcessInterval({.at_time = kDefaultStartTime});
EXPECT_THAT(*update.target_rate, TargetRateCloseTo(kInitialBitrate));
EXPECT_THAT(*update.pacer_config,
Property(&PacerConfig::data_rate, Ge(kInitialBitrate)));
}
TEST(PccNetworkControllerTest, UpdatesTargetSendRate) {
PccNetworkControllerFactory factory;
Scenario s("pcc_unit/updates_rate", false);
CallClientConfig config;
config.transport.cc_factory = &factory;
config.transport.rates.min_rate = DataRate::KilobitsPerSec(10);
config.transport.rates.max_rate = DataRate::KilobitsPerSec(1500);
config.transport.rates.start_rate = DataRate::KilobitsPerSec(300);
auto send_net = s.CreateMutableSimulationNode([](NetworkSimulationConfig* c) {
c->bandwidth = DataRate::KilobitsPerSec(500);
c->delay = TimeDelta::Millis(100);
});
auto ret_net = s.CreateMutableSimulationNode(
[](NetworkSimulationConfig* c) { c->delay = TimeDelta::Millis(100); });
auto* client = s.CreateClient("send", config);
auto* route = s.CreateRoutes(client, {send_net->node()},
s.CreateClient("return", CallClientConfig()),
{ret_net->node()});
VideoStreamConfig video;
video.stream.use_rtx = false;
s.CreateVideoStream(route->forward(), video);
s.RunFor(TimeDelta::Seconds(30));
EXPECT_NEAR(client->target_rate().kbps(), 450, 100);
send_net->UpdateConfig([](NetworkSimulationConfig* c) {
c->bandwidth = DataRate::KilobitsPerSec(800);
c->delay = TimeDelta::Millis(100);
});
s.RunFor(TimeDelta::Seconds(40));
EXPECT_NEAR(client->target_rate().kbps(), 750, 150);
send_net->UpdateConfig([](NetworkSimulationConfig* c) {
c->bandwidth = DataRate::KilobitsPerSec(200);
c->delay = TimeDelta::Millis(200);
});
ret_net->UpdateConfig(
[](NetworkSimulationConfig* c) { c->delay = TimeDelta::Millis(200); });
s.RunFor(TimeDelta::Seconds(35));
EXPECT_LE(client->target_rate().kbps(), 200);
EXPECT_GT(client->target_rate().kbps(), 90);
}
} // namespace test
} // namespace webrtc