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// 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 "media/learning/mojo/mojo_learning_task_controller_service.h"
#include <utility>
#include "base/bind.h"
#include "media/learning/common/learning_task_controller.h"
namespace media {
namespace learning {
// Somewhat arbitrary upper limit on the number of in-flight observations that
// we'll allow a client to have.
static const size_t kMaxInFlightObservations = 16;
MojoLearningTaskControllerService::MojoLearningTaskControllerService(
const LearningTask& task,
ukm::SourceId source_id,
std::unique_ptr<::media::learning::LearningTaskController> impl)
: task_(task), source_id_(source_id), impl_(std::move(impl)) {}
MojoLearningTaskControllerService::~MojoLearningTaskControllerService() =
default;
void MojoLearningTaskControllerService::BeginObservation(
const base::UnguessableToken& id,
const FeatureVector& features,
const absl::optional<TargetValue>& default_target) {
// Drop the observation if it doesn't match the feature description size.
if (features.size() != task_.feature_descriptions.size())
return;
// Don't allow the client to send too many in-flight observations.
if (in_flight_observations_.size() >= kMaxInFlightObservations)
return;
in_flight_observations_.insert(id);
// Since we own |impl_|, we don't need to keep track of in-flight
// observations. We'll release |impl_| on destruction, which cancels them.
impl_->BeginObservation(id, features, default_target, source_id_);
}
void MojoLearningTaskControllerService::CompleteObservation(
const base::UnguessableToken& id,
const ObservationCompletion& completion) {
auto iter = in_flight_observations_.find(id);
if (iter == in_flight_observations_.end())
return;
in_flight_observations_.erase(iter);
impl_->CompleteObservation(id, completion);
}
void MojoLearningTaskControllerService::CancelObservation(
const base::UnguessableToken& id) {
auto iter = in_flight_observations_.find(id);
if (iter == in_flight_observations_.end())
return;
in_flight_observations_.erase(iter);
impl_->CancelObservation(id);
}
void MojoLearningTaskControllerService::UpdateDefaultTarget(
const base::UnguessableToken& id,
const absl::optional<TargetValue>& default_target) {
auto iter = in_flight_observations_.find(id);
if (iter == in_flight_observations_.end())
return;
impl_->UpdateDefaultTarget(id, default_target);
}
void MojoLearningTaskControllerService::PredictDistribution(
const FeatureVector& features,
PredictDistributionCallback callback) {
impl_->PredictDistribution(features, std::move(callback));
}
} // namespace learning
} // namespace media
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