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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/blink/learning_experiment_helper.h"
namespace media {
using learning::FeatureDictionary;
using learning::FeatureVector;
using learning::LearningTask;
using learning::LearningTaskController;
using learning::TargetValue;
LearningExperimentHelper::LearningExperimentHelper(
std::unique_ptr<LearningTaskController> controller)
: controller_(std::move(controller)) {}
LearningExperimentHelper::~LearningExperimentHelper() {
CancelObservationIfNeeded();
}
void LearningExperimentHelper::BeginObservation(
const FeatureDictionary& dictionary) {
if (!controller_)
return;
CancelObservationIfNeeded();
// Get the features that our task needs.
FeatureVector features;
dictionary.Lookup(controller_->GetLearningTask(), &features);
observation_id_ = base::UnguessableToken::Create();
controller_->BeginObservation(observation_id_, features);
}
void LearningExperimentHelper::CompleteObservationIfNeeded(
const TargetValue& target) {
if (!observation_id_)
return;
controller_->CompleteObservation(observation_id_, target);
observation_id_ = base::UnguessableToken::Null();
}
void LearningExperimentHelper::CancelObservationIfNeeded() {
if (!observation_id_)
return;
controller_->CancelObservation(observation_id_);
observation_id_ = base::UnguessableToken::Null();
}
} // namespace media
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