PacDataReader.h

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/***************************************************************************
 *   Copyright (C) 2008-2010 by Matthias Nagl                              *
 *   mnagl@uni-goettingen.de                                               *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifndef PACDATAREADER_H
#define PACDATAREADER_H

#include <QThread>
#include <QSemaphore>
#include <QHash>
#include "pacDataTypes.h"
#include "pacDefinitions.h"

class PacBasicMeasurementInfo;

class PacDataReader : public QThread
{
  Q_OBJECT
public:

  PacDataReader(
        const PacBasicMeasurementInfo *basicinfo,
        QObject *parent = 0
        );

    ~PacDataReader();

    void setReadoutParameters(Pac::ReadoutRange range, quint64 numchunks);

    void setReadoutStartPosition(quint64 startpointer = 0);

    const Pac::Event * nextEventPointer();

    int progress(bool beginningandend);

    quint64 nextChunkPosPointerPos() const;

    bool paceventsFileStillWritten() const;

protected:
    void run();

private:

    const PacBasicMeasurementInfo *basicinfo;
    quint64 eventsperchunk;
    quint64 numofrecords;



    static const quint64 tryreadoutatonce;
    quint64 numchunks;
    Pac::ReadoutRange range;
    quint64 startpointer;
    quint64 nextchunkpospointerpos; 
    bool stillwritten; 
    quint64 currentreadpercentageestimate; 



    static const quint32 buffersize;
    static const quint32 acquireatonce;
    Pac::Event ** buffer;
    quint32 nextwritepos, nextreadpos;
    QSemaphore free, used;
    qint32 remainingacquired; 
    qint32 numacquired; 
    bool readerisactive; 



    quint64 totaleventsread;
    QAtomicInt stopthread;
};

#endif // PACDATAREADER_H