gdcmJPEGCodec.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 GDCMJPEGCODEC_H
#define GDCMJPEGCODEC_H
 
#include "gdcmImageCodec.h"
 
namespace gdcm
{
 
class PixelFormat;
class TransferSyntax;
class GDCM_EXPORT JPEGCodec : public ImageCodec
{
friend class ImageRegionReader;
public:
  JPEGCodec();
  ~JPEGCodec() override;
  bool CanDecode(TransferSyntax const &ts) const override;
  bool CanCode(TransferSyntax const &ts) const override;
  bool Decode(DataElement const &is, DataElement &os) override;
  void SetPixelFormat(PixelFormat const &pf) override;
 
  void ComputeOffsetTable(bool b);
 
  bool Code(DataElement const &in, DataElement &out) override;
 
  bool GetHeaderInfo(std::istream &is, TransferSyntax &ts) override;
  ImageCodec * Clone() const override;
 
  //void SetReversible(bool res);
 
  void SetQuality(double q);
  double GetQuality() const;
 
  void SetLossless(bool l);
  bool GetLossless() const;
 
  virtual bool EncodeBuffer( std::ostream & out,
    const char *inbuffer, size_t inlen);
 
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;
  bool IsValid(PhotometricInterpretation const &pi) override;
 
  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;
 
protected:
  // Internal method called by SetPixelFormat
  // Instantiate the right jpeg codec (8, 12 or 16)
  void SetBitSample(int bit);
 
  virtual bool IsStateSuspension() const;
 
protected:
  int BitSample;
  //bool Lossless;
  int Quality;
 
private:
  void SetupJPEGBitCodec(int bit);
  JPEGCodec *Internal;
};
 
} // end namespace gdcm
 
#endif //GDCMJPEGCODEC_H