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arithcodecbase.h

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/***************************************************************************
    arithcodecbase.h  -  Definition of class ArithCodecBase
                             -------------------
    begin                : June 21 2002
    copyright            : (C) 2003 by Vojtìch Toman
    email                : vtoman@lit.cz
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef ARITHCODECBASE_H
#define ARITHCODECBASE_H



#include "defs.h"
#include "arithdefs.h"
#include "iodevice.h"


class ArithCodecBase
{
public:
  virtual void setOutputDevice(IODevice *device) { outputDevice = device; }

  virtual void setInputDevice(IODevice *device) { inputDevice = device; }

  virtual void arithmeticEncode(FreqValue, FreqValue, FreqValue) = 0;

  virtual FreqValue arithmeticDecodeTarget(FreqValue) = 0;

  virtual void arithmeticDecode(FreqValue, FreqValue, FreqValue) = 0;

  virtual void startEncode(void) = 0;

  virtual void finishEncode(void) = 0;

  virtual void startDecode(void) = 0;

  virtual void finishDecode(void) = 0;

  virtual void startOutputtingBits(void) = 0;

  virtual void startInputtingBits(void) = 0;

  virtual void doneOutputtingBits(void) = 0;

  virtual void doneInputtingBits(void) = 0;

  virtual size_t numberOfOutputBytes(void) = 0;

protected:
  IODevice *outputDevice;

  IODevice *inputDevice;
}; //ArithCodecBase


#endif //ARITHCODECBASE_H

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