chromium/services/network/network_quality_estimator_manager.cc

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "services/network/network_quality_estimator_manager.h"

#include <algorithm>
#include <map>
#include <string>
#include <utility>

#include "base/check_op.h"
#include "base/command_line.h"
#include "base/metrics/field_trial_params.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "net/base/features.h"
#include "net/nqe/network_quality_estimator.h"
#include "net/nqe/network_quality_estimator_params.h"
#include "services/network/public/cpp/network_switches.h"

namespace {

// Returns true if |past_value| is significantly different from |current_value|.
// Metric changed meaningfully only if (i) the difference between the two
// values exceed the threshold |min_difference_in_metrics|; and,
// (ii) the ratio of the values also exceeds the threshold |min_ratio|.
bool MetricChangedMeaningfully(int32_t past_value,
                               int32_t current_value,
                               int min_difference_in_metrics,
                               float min_ratio) { … }

bool LatencyMetricChangedMeaningfully(int32_t past_value,
                                      int32_t current_value) { … }

bool BandwidthMetricChangedMeaningfully(int32_t past_value,
                                        int32_t current_value) { … }
}  // namespace

namespace network {

NetworkQualityEstimatorManager::NetworkQualityEstimatorManager(
    net::NetLog* net_log) { … }

NetworkQualityEstimatorManager::~NetworkQualityEstimatorManager() { … }

void NetworkQualityEstimatorManager::AddReceiver(
    mojo::PendingReceiver<mojom::NetworkQualityEstimatorManager> receiver) { … }

void NetworkQualityEstimatorManager::RequestNotifications(
    mojo::PendingRemote<mojom::NetworkQualityEstimatorManagerClient>
        pending_client) { … }

void NetworkQualityEstimatorManager::OnEffectiveConnectionTypeChanged(
    net::EffectiveConnectionType effective_connection_type) { … }

void NetworkQualityEstimatorManager::OnRTTOrThroughputEstimatesComputed(
    base::TimeDelta http_rtt,
    base::TimeDelta transport_rtt,
    int32_t downstream_throughput_kbps) { … }

net::NetworkQualityEstimator*
NetworkQualityEstimatorManager::GetNetworkQualityEstimator() const { … }

}  // namespace network