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// Copyright 2018 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.
#ifndef MEDIA_LEARNING_IMPL_LEARNING_SESSION_IMPL_H_
#define MEDIA_LEARNING_IMPL_LEARNING_SESSION_IMPL_H_
#include <map>
#include "base/component_export.h"
#include "base/threading/sequence_bound.h"
#include "media/learning/common/learning_session.h"
#include "media/learning/common/learning_task_controller.h"
#include "media/learning/impl/feature_provider.h"
namespace media {
namespace learning {
// Concrete implementation of a LearningSession. This allows registration of
// learning tasks.
class COMPONENT_EXPORT(LEARNING_IMPL) LearningSessionImpl
: public LearningSession {
public:
LearningSessionImpl();
~LearningSessionImpl() override;
using CreateTaskControllerCB =
base::RepeatingCallback<std::unique_ptr<LearningTaskController>(
const LearningTask&,
SequenceBoundFeatureProvider)>;
void SetTaskControllerFactoryCBForTesting(CreateTaskControllerCB cb);
// LearningSession
void AddExample(const std::string& task_name,
const LabelledExample& example) override;
// Registers |task|, so that calls to AddExample with |task.name| will work.
// This will create a new controller for the task.
void RegisterTask(const LearningTask& task,
SequenceBoundFeatureProvider feature_provider =
SequenceBoundFeatureProvider());
private:
// [task_name] = task controller.
using LearningTaskMap =
std::map<std::string, std::unique_ptr<LearningTaskController>>;
LearningTaskMap task_map_;
CreateTaskControllerCB controller_factory_;
};
} // namespace learning
} // namespace media
#endif // MEDIA_LEARNING_IMPL_LEARNING_SESSION_IMPL_H_