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/*
* Copyright 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/goog_cc/test/goog_cc_printer.h"
#include <math.h>
#include <utility>
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "modules/congestion_controller/goog_cc/alr_detector.h"
#include "modules/congestion_controller/goog_cc/delay_based_bwe.h"
#include "modules/congestion_controller/goog_cc/trendline_estimator.h"
#include "modules/remote_bitrate_estimator/aimd_rate_control.h"
#include "rtc_base/checks.h"
namespace webrtc {
namespace {
void WriteTypedValue(RtcEventLogOutput* out, int value) {
LogWriteFormat(out, "%i", value);
}
void WriteTypedValue(RtcEventLogOutput* out, double value) {
LogWriteFormat(out, "%.6f", value);
}
void WriteTypedValue(RtcEventLogOutput* out, absl::optional<DataRate> value) {
LogWriteFormat(out, "%.0f", value ? value->bytes_per_sec<double>() : NAN);
}
void WriteTypedValue(RtcEventLogOutput* out, absl::optional<DataSize> value) {
LogWriteFormat(out, "%.0f", value ? value->bytes<double>() : NAN);
}
void WriteTypedValue(RtcEventLogOutput* out, absl::optional<TimeDelta> value) {
LogWriteFormat(out, "%.3f", value ? value->seconds<double>() : NAN);
}
void WriteTypedValue(RtcEventLogOutput* out, absl::optional<Timestamp> value) {
LogWriteFormat(out, "%.3f", value ? value->seconds<double>() : NAN);
}
template <typename F>
class TypedFieldLogger : public FieldLogger {
public:
TypedFieldLogger(absl::string_view name, F&& getter)
: name_(name), getter_(std::forward<F>(getter)) {}
const std::string& name() const override { return name_; }
void WriteValue(RtcEventLogOutput* out) override {
WriteTypedValue(out, getter_());
}
private:
std::string name_;
F getter_;
};
template <typename F>
FieldLogger* Log(absl::string_view name, F&& getter) {
return new TypedFieldLogger<F>(name, std::forward<F>(getter));
}
} // namespace
GoogCcStatePrinter::GoogCcStatePrinter() {
for (auto* logger : CreateLoggers()) {
loggers_.emplace_back(logger);
}
}
std::deque<FieldLogger*> GoogCcStatePrinter::CreateLoggers() {
auto stable_estimate = [this] {
return DataRate::KilobitsPerSec(
controller_->delay_based_bwe_->rate_control_.link_capacity_
.estimate_kbps_.value_or(-INFINITY));
};
auto rate_control_state = [this] {
return static_cast<int>(
controller_->delay_based_bwe_->rate_control_.rate_control_state_);
};
auto trend = [this] {
return reinterpret_cast<TrendlineEstimator*>(
controller_->delay_based_bwe_->active_delay_detector_);
};
auto acknowledged_rate = [this] {
return controller_->acknowledged_bitrate_estimator_->bitrate();
};
auto loss_cont = [&] {
return &controller_->bandwidth_estimation_
->loss_based_bandwidth_estimator_v1_;
};
std::deque<FieldLogger*> loggers({
Log("time", [=] { return target_.at_time; }),
Log("rtt", [=] { return target_.network_estimate.round_trip_time; }),
Log("target", [=] { return target_.target_rate; }),
Log("stable_target", [=] { return target_.stable_target_rate; }),
Log("pacing", [=] { return pacing_.data_rate(); }),
Log("padding", [=] { return pacing_.pad_rate(); }),
Log("window", [=] { return congestion_window_; }),
Log("rate_control_state", [=] { return rate_control_state(); }),
Log("stable_estimate", [=] { return stable_estimate(); }),
Log("trendline", [=] { return trend()->prev_trend_; }),
Log("trendline_modified_offset",
[=] { return trend()->prev_modified_trend_; }),
Log("trendline_offset_threshold", [=] { return trend()->threshold_; }),
Log("acknowledged_rate", [=] { return acknowledged_rate(); }),
Log("est_capacity", [=] { return est_.link_capacity; }),
Log("est_capacity_dev", [=] { return est_.link_capacity_std_dev; }),
Log("est_capacity_min", [=] { return est_.link_capacity_min; }),
Log("est_cross_traffic", [=] { return est_.cross_traffic_ratio; }),
Log("est_cross_delay", [=] { return est_.cross_delay_rate; }),
Log("est_spike_delay", [=] { return est_.spike_delay_rate; }),
Log("est_pre_buffer", [=] { return est_.pre_link_buffer_delay; }),
Log("est_post_buffer", [=] { return est_.post_link_buffer_delay; }),
Log("est_propagation", [=] { return est_.propagation_delay; }),
Log("loss_ratio", [=] { return loss_cont()->last_loss_ratio_; }),
Log("loss_average", [=] { return loss_cont()->average_loss_; }),
Log("loss_average_max", [=] { return loss_cont()->average_loss_max_; }),
Log("loss_thres_inc",
[=] { return loss_cont()->loss_increase_threshold(); }),
Log("loss_thres_dec",
[=] { return loss_cont()->loss_decrease_threshold(); }),
Log("loss_dec_rate", [=] { return loss_cont()->decreased_bitrate(); }),
Log("loss_based_rate", [=] { return loss_cont()->loss_based_bitrate_; }),
Log("loss_ack_rate",
[=] { return loss_cont()->acknowledged_bitrate_max_; }),
Log("data_window", [=] { return controller_->current_data_window_; }),
Log("pushback_target",
[=] { return controller_->last_pushback_target_rate_; }),
});
return loggers;
}
GoogCcStatePrinter::~GoogCcStatePrinter() = default;
void GoogCcStatePrinter::PrintHeaders(RtcEventLogOutput* log) {
int ix = 0;
for (const auto& logger : loggers_) {
if (ix++)
log->Write(" ");
log->Write(logger->name());
}
log->Write("\n");
log->Flush();
}
void GoogCcStatePrinter::PrintState(RtcEventLogOutput* log,
GoogCcNetworkController* controller,
Timestamp at_time) {
controller_ = controller;
auto state_update = controller_->GetNetworkState(at_time);
target_ = state_update.target_rate.value();
pacing_ = state_update.pacer_config.value();
if (state_update.congestion_window)
congestion_window_ = *state_update.congestion_window;
if (controller_->network_estimator_) {
est_ = controller_->network_estimator_->GetCurrentEstimate().value_or(
NetworkStateEstimate());
}
int ix = 0;
for (const auto& logger : loggers_) {
if (ix++)
log->Write(" ");
logger->WriteValue(log);
}
log->Write("\n");
log->Flush();
}
GoogCcDebugFactory::GoogCcDebugFactory()
: GoogCcDebugFactory(GoogCcFactoryConfig()) {}
GoogCcDebugFactory::GoogCcDebugFactory(GoogCcFactoryConfig config)
: GoogCcNetworkControllerFactory(std::move(config)) {}
std::unique_ptr<NetworkControllerInterface> GoogCcDebugFactory::Create(
NetworkControllerConfig config) {
RTC_CHECK(controller_ == nullptr);
auto controller = GoogCcNetworkControllerFactory::Create(config);
controller_ = static_cast<GoogCcNetworkController*>(controller.get());
return controller;
}
void GoogCcDebugFactory::PrintState(const Timestamp at_time) {
if (controller_ && log_writer_) {
printer_.PrintState(log_writer_.get(), controller_, at_time);
}
}
void GoogCcDebugFactory::AttachWriter(
std::unique_ptr<RtcEventLogOutput> log_writer) {
if (log_writer) {
log_writer_ = std::move(log_writer);
printer_.PrintHeaders(log_writer_.get());
}
}
} // namespace webrtc
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