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/*
* Copyright (c) 2019 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/acknowledged_bitrate_estimator_interface.h"
#include <algorithm>
#include <memory>
#include "api/field_trials_view.h"
#include "api/units/time_delta.h"
#include "modules/congestion_controller/goog_cc/acknowledged_bitrate_estimator.h"
#include "modules/congestion_controller/goog_cc/robust_throughput_estimator.h"
#include "rtc_base/experiments/struct_parameters_parser.h"
#include "rtc_base/logging.h"
namespace webrtc {
constexpr char RobustThroughputEstimatorSettings::kKey[];
RobustThroughputEstimatorSettings::RobustThroughputEstimatorSettings(
const FieldTrialsView* key_value_config) {
Parser()->Parse(
key_value_config->Lookup(RobustThroughputEstimatorSettings::kKey));
if (window_packets < 10 || 1000 < window_packets) {
RTC_LOG(LS_WARNING) << "Window size must be between 10 and 1000 packets";
window_packets = 20;
}
if (max_window_packets < 10 || 1000 < max_window_packets) {
RTC_LOG(LS_WARNING)
<< "Max window size must be between 10 and 1000 packets";
max_window_packets = 500;
}
max_window_packets = std::max(max_window_packets, window_packets);
if (required_packets < 10 || 1000 < required_packets) {
RTC_LOG(LS_WARNING) << "Required number of initial packets must be between "
"10 and 1000 packets";
required_packets = 10;
}
required_packets = std::min(required_packets, window_packets);
if (min_window_duration < TimeDelta::Millis(100) ||
TimeDelta::Millis(3000) < min_window_duration) {
RTC_LOG(LS_WARNING) << "Window duration must be between 100 and 3000 ms";
min_window_duration = TimeDelta::Millis(750);
}
if (max_window_duration < TimeDelta::Seconds(1) ||
TimeDelta::Seconds(15) < max_window_duration) {
RTC_LOG(LS_WARNING) << "Max window duration must be between 1 and 15 s";
max_window_duration = TimeDelta::Seconds(5);
}
min_window_duration = std::min(min_window_duration, max_window_duration);
if (unacked_weight < 0.0 || 1.0 < unacked_weight) {
RTC_LOG(LS_WARNING)
<< "Weight for prior unacked size must be between 0 and 1.";
unacked_weight = 1.0;
}
}
std::unique_ptr<StructParametersParser>
RobustThroughputEstimatorSettings::Parser() {
return StructParametersParser::Create(
"enabled", &enabled, //
"window_packets", &window_packets, //
"max_window_packets", &max_window_packets, //
"window_duration", &min_window_duration, //
"max_window_duration", &max_window_duration, //
"required_packets", &required_packets, //
"unacked_weight", &unacked_weight);
}
AcknowledgedBitrateEstimatorInterface::
~AcknowledgedBitrateEstimatorInterface() {}
std::unique_ptr<AcknowledgedBitrateEstimatorInterface>
AcknowledgedBitrateEstimatorInterface::Create(
const FieldTrialsView* key_value_config) {
RobustThroughputEstimatorSettings simplified_estimator_settings(
key_value_config);
if (simplified_estimator_settings.enabled) {
return std::make_unique<RobustThroughputEstimator>(
simplified_estimator_settings);
}
return std::make_unique<AcknowledgedBitrateEstimator>(key_value_config);
}
} // namespace webrtc
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