Quelle  PredictiveAdaptationLogic.hpp   Sprache: C

/*
 * PredictiveAdaptationLogic.hpp
 *****************************************************************************
 * Copyright (C) 2016 - VideoLAN Authors
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/
#ifndef PREDICTIVEADAPTATIONLOGIC_HPP
#define PREDICTIVEADAPTATIONLOGIC_HPP

#include "AbstractAdaptationLogic.h"
#include "../tools/MovingAverage.hpp"
#include <map>
#include <vlc_threads.h>

namespace adaptive
{
    namespace logic
    {
        class PredictiveStats
        {
            friend class PredictiveAdaptationLogic;

            public:
                PredictiveStats();
                bool starting() const;

            private:
                size_t  segments_count;
                vlc_tick_t buffering_level;
                vlc_tick_t buffering_target;
                unsigned last_download_rate;
                vlc_tick_t last_duration;
                MovingAverage<unsigned> average;
        };

        class PredictiveAdaptationLogic : public AbstractAdaptationLogic
        {
            public:
                PredictiveAdaptationLogic(vlc_object_t *);
                virtual ~PredictiveAdaptationLogic();

                BaseRepresentation* getNextRepresentation(BaseAdaptationSet *,
                                                          BaseRepresentation *) override;
                void                updateDownloadRate     (const ID &, size_t,
                                                            vlc_tick_t, vlc_tick_t) override;
                void                trackerEvent           (const TrackerEvent &) override;

            private:
                unsigned                    getAvailableBw(unsigned, const BaseRepresentation *) const;
                std::map<adaptive::ID, PredictiveStats> streams;
                unsigned                    usedBps;
                vlc_mutex_t                 lock;
        };
    }
}

#endif // PREDICTIVEADAPTATIONLOGIC_HPP