PndHammingDecoder.h

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//****************************************************************************
//*                   This file is part of PandaRoot.                        *
//*                                                                          *
//*            PandaRoot is distributed under the terms of the               *
//*              GNU General Public License (GPL) version 3,                 *
//*                 copied verbatim in the file "LICENSE".                   *
//*                                                                          *
//*  Copyright (C) 2006 - 2024 FAIR GmbH and copyright holders of PandaRoot  *
//*     The copyright holders are listed in the file "COPYRIGHTHOLDERS".     *
//*               The authors are listed in the file "AUTHORS".              *
//****************************************************************************

/*
 * PndHammingEncoder.h
 *
 *  Created on: 16.09.2015
 *      Author: Stockmanns
 */

#ifndef MVD_MVDOFFLINETBANALYSIS_TOPIX4_PNDHAMMINGDECODER_H_
#define MVD_MVDOFFLINETBANALYSIS_TOPIX4_PNDHAMMINGDECODER_H_

#include "Rtypes.h"

class PndHammingDecoder {
 public:
  PndHammingDecoder();
  virtual ~PndHammingDecoder();

  UShort_t CheckHammingCode(ULong64_t dataword, int dataword_length);
  ULong64_t CalculateCRCTableFast(std::vector<char> p, ULong64_t len);
  ULong64_t ReflectBitsStream(ULong64_t crc, int bitnum);
  std::vector<char> ConvertData(std::vector<ULong64_t> topixFrame);

 protected:
  void GenerateCRCTable();

 private:
  // CRC parameters :

  const UInt_t fOrder;
  const ULong64_t fPolynom;
  const ULong64_t fCRCXor;
  const UInt_t fRefIn;
  const UInt_t fRefOut;

  ULong64_t fCRCMask;
  ULong64_t fCRCHighBit;
  ULong64_t fCRCInit_direct;
  ULong64_t fCRCTab[256];
};

#endif /* MVD_MVDOFFLINETBANALYSIS_TOPIX4_PNDHAMMINGDECODER_H_ */