speedcalculator.h

//------------------------------------------------------------------------------
// speedcalculator.h
//------------------------------------------------------------------------------
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// 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 General Public License for more details.
//
// You should have received a copy of the GNU 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.
//
//------------------------------------------------------------------------------
// Copyright (C) 2010 "Zalewa" <zalewapl@gmail.com>
//------------------------------------------------------------------------------
#ifndef __SPEEDCALCULATOR_H__
#define __SPEEDCALCULATOR_H__

#include <QVector>
#include <QTime>

class SpeedCalculator
{
        public:
                SpeedCalculator();

                long double estimatedTimeUntilArrival() const;

                qint64 expectedDataSize() const { return dataSizeExpected; }

                long double getSpeed() const;

                qint64 lastRegisteredDataAmount() const;

                qint64 lastRegisterAttemptedDataAmount() const
                {
                        return lastRegisterAttemptDataSize;
                }

                void registerDataAmount(qint64 totalAmountOfArrivedData);

                void setExpectedDataSize(qint64 size);

                void start();

        private:
                class DataArrivalInfo
                {
                        public:
                                qint64 totalAmountOfArrivedData;

                                qint64 timeOfArrival;

                                DataArrivalInfo()
                                {
                                        this->totalAmountOfArrivedData = 0;
                                        this->timeOfArrival = 0;
                                }

                                DataArrivalInfo(qint64 totalAmountOfArrivedData, qint64 timeOfArrival)
                                {
                                        this->totalAmountOfArrivedData = totalAmountOfArrivedData;
                                        this->timeOfArrival = timeOfArrival;
                                }
                };

                static const int NUM_ARRIVAL_DATA = 2;

                QVector<DataArrivalInfo> arrivalData;

//              QVector<long double>            averageSpeeds;

                QTime clock;
                qint64 dataSizeExpected;

                qint64 lastRegisterAttemptDataSize;
};

#endif