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content / browser / media / browser_feature_provider.cc [blame]
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/media/browser_feature_provider.h"
#include <utility>
#include "base/power_monitor/power_monitor.h"
#include "base/task/sequenced_task_runner.h"
#include "media/learning/common/feature_library.h"
#include "net/base/network_change_notifier.h"
using ::media::learning::FeatureLibrary;
using ::media::learning::FeatureProviderFactoryCB;
using ::media::learning::FeatureValue;
using ::media::learning::FeatureVector;
using ::media::learning::LearningTask;
using ::media::learning::SequenceBoundFeatureProvider;
namespace content {
BrowserFeatureProvider::BrowserFeatureProvider(const LearningTask& task)
: task_(task) {}
BrowserFeatureProvider::~BrowserFeatureProvider() = default;
// static
SequenceBoundFeatureProvider BrowserFeatureProvider::Create(
const LearningTask& task) {
return base::SequenceBound<BrowserFeatureProvider>(
base::SequencedTaskRunner::GetCurrentDefault(), task);
}
// static
FeatureProviderFactoryCB BrowserFeatureProvider::GetFactoryCB() {
return base::BindRepeating(&BrowserFeatureProvider::Create);
}
void BrowserFeatureProvider::AddFeatures(FeatureVector features,
FeatureVectorCB cb) {
const size_t size = task_.feature_descriptions.size();
if (features.size() < size)
features.resize(size);
// Find any features that we're supposed to fill in.
for (size_t i = 0; i < size; i++) {
const auto& desc = task_.feature_descriptions[i];
if (desc.name == FeatureLibrary::NetworkType().name) {
features[i] = FeatureValue(
static_cast<int>(net::NetworkChangeNotifier::GetConnectionType()));
} else if (desc.name == FeatureLibrary::BatteryPower().name) {
bool is_battery = false;
if (auto* power_monitor = base::PowerMonitor::GetInstance();
power_monitor->IsInitialized()) {
is_battery = power_monitor->IsOnBatteryPower();
}
features[i] = FeatureValue(is_battery);
}
}
std::move(cb).Run(std::move(features));
}
} // namespace content