chromium/media/capabilities/learning_helper.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 "media/capabilities/learning_helper.h"

#include "base/task/thread_pool.h"
#include "media/learning/common/feature_library.h"
#include "media/learning/common/learning_task.h"

namespace media {

FeatureLibrary;
FeatureProviderFactoryCB;
FeatureValue;
LabelledExample;
LearningSessionImpl;
LearningTask;
LearningTaskController;
ObservationCompletion;
SequenceBoundFeatureProvider;
TargetValue;

// Remember that these are used to construct UMA histogram names!  Be sure to
// update histograms.xml if you change them!

// Dropped frame ratio, default features, unweighted regression tree.
const char* const kDroppedFrameRatioBaseUnweightedTreeTaskName = …;

// Dropped frame ratio, default features, unweighted examples, lookup table.
const char* const kDroppedFrameRatioBaseUnweightedTableTaskName = …;

// Same as BaseUnweightedTree, but with 200 training examples max.
const char* const kDroppedFrameRatioBaseUnweightedTree200TaskName = …;

// Dropped frame ratio, default+FeatureLibrary features, regression tree with
// unweighted examples and 200 training examples max.
const char* const kDroppedFrameRatioEnhancedUnweightedTree200TaskName = …;

// Threshold for the dropped frame to total frame ratio, at which we'll decide
// that the playback was not smooth.
constexpr double kSmoothnessThreshold = …;

LearningHelper::LearningHelper(FeatureProviderFactoryCB feature_factory) { … }

LearningHelper::~LearningHelper() = default;

void LearningHelper::AppendStats(
    const VideoDecodeStatsDB::VideoDescKey& video_key,
    learning::FeatureValue origin,
    const VideoDecodeStatsDB::DecodeStatsEntry& new_stats) { … }

void LearningHelper::AddExample(LearningTaskController* controller,
                                const LabelledExample& example) { … }

}  // namespace media