gdcmRLECodec.h

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/*=========================================================================
 
  Program: GDCM (Grassroots DICOM). A DICOM library
 
  Copyright (c) 2006-2011 Mathieu Malaterre
  All rights reserved.
  See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef GDCMRLECODEC_H
#define GDCMRLECODEC_H
 
#include "gdcmImageCodec.h"
 
namespace gdcm
{
 
class Fragment;
class RLEInternals;
class GDCM_EXPORT RLECodec : public ImageCodec
{
friend class ImageRegionReader;
public:
  RLECodec();
  ~RLECodec() override;
  bool CanCode(TransferSyntax const &ts) const override;
  bool CanDecode(TransferSyntax const &ts) const override;
  bool Decode(DataElement const &is, DataElement &os) override;
  unsigned long GetBufferLength() const { return BufferLength; }
  void SetBufferLength(unsigned long l) { BufferLength = l; }
 
  bool Code(DataElement const &in, DataElement &out) override;
  bool GetHeaderInfo(std::istream &is, TransferSyntax &ts) override;
  ImageCodec * Clone() const override;
 
protected:
  bool DecodeExtent(
    char *buffer,
    unsigned int XMin, unsigned int XMax,
    unsigned int YMin, unsigned int YMax,
    unsigned int ZMin, unsigned int ZMax,
    std::istream & is
  );
 
  bool DecodeByStreams(std::istream &is, std::ostream &os) override;
public:
 
  void SetLength(unsigned long l)
    {
    Length = l;
    }
 
protected:
  bool StartEncode( std::ostream & ) override;
  bool IsRowEncoder() override;
  bool IsFrameEncoder() override;
  bool AppendRowEncode( std::ostream & out, const char * data, size_t datalen ) override;
  bool AppendFrameEncode( std::ostream & out, const char * data, size_t datalen ) override;
  bool StopEncode( std::ostream & ) override;
 
private:
  bool DecodeByStreamsCommon(std::istream &is, std::ostream &os);
  RLEInternals *Internals;
  unsigned long Length;
  unsigned long BufferLength;
  size_t DecodeFragment(Fragment const & frag, char *buffer, size_t llen);
};
 
} // end namespace gdcm
 
#endif //GDCMRLECODEC_H