/*=========================================================================
                                                                                
  Program:   gdcm
  Module:    $RCSfile: gdcmJPEGFragment.h,v $
  Language:  C++
  Date:      $Date: 2007/09/17 12:16:01 $
  Version:   $Revision: 1.23 $
                                                                                
  Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
  l'Image). All rights reserved. See Doc/License.txt or
  http://www.creatis.insa-lyon.fr/Public/Gdcm/License.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 notices for more information.
                                                                                
=========================================================================*/


#ifndef _GDCMJPEGFRAGMENT_H_
#define _GDCMJPEGFRAGMENT_H_

#include "gdcmBase.h"

#include <iostream>
#include <fstream>

namespace GDCM_NAME_SPACE 
{
/**
 * \brief *very* internal class . Shouldn't appear here !
 *         Utility class for summerizing the informations of a JPEG
 *        fragment of an "Encapsulated JPEG Compressed Image".
 *        This information is a mix of:
 *        - the fragment offset
 *        - the fragment length 
 *
 *        Each instance of this class (they can be as many instances for
 *        a given Document as they are JPEG fragments and they are
 *        collected in a JPEGFragmentsInfo )
 */
class GDCM_EXPORT JPEGFragment : public Base
{
public:
   JPEGFragment();
   void Print( std::ostream &os = std::cout, std::string const &indent = "" );
   void DecompressJPEGFramesFromFile(std::ifstream *fp, 
                                     uint8_t *buffer, int nBits, 
                                     int &statesuspension);

   bool ReadJPEGFile8  (std::ifstream *fp, void *image_buffer, int &statesuspension );
   bool ReadJPEGFile12 (std::ifstream *fp, void *image_buffer, int &statesuspension );
   bool ReadJPEGFile16 (std::ifstream *fp, void *image_buffer, int &statesuspension );

   void SetLength(uint32_t length) { Length = length; }
   uint32_t GetLength()            { return Length;   }
   void SetOffset(uint32_t offset) { Offset = offset; }
   uint32_t GetOffset()            { return Offset;   }
   uint8_t *GetImage()             { return pImage;   }

private:
   uint32_t Offset;
   uint32_t Length;

   uint8_t *pImage;
};
} // end namespace gdcm

//-----------------------------------------------------------------------------
#endif