gdcm_conv 0.2.0

/*=========================================================================

  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 GDCMJPEG2000CODEC_H
#define GDCMJPEG2000CODEC_H

#include "gdcmImageCodec.h"

namespace gdcm
{

class JPEG2000Internals;
/**
 * \brief Class to do JPEG 2000
 * \note
 * the class will produce JPC (JPEG 2000 codestream), since some private implementor
 * are using full jp2 file the decoder tolerate jp2 input
 * this is an implementation of an ImageCodec
 */
class GDCM_EXPORT JPEG2000Codec : public ImageCodec
{
friend class ImageRegionReader;
  friend class Bitmap;
public:
  JPEG2000Codec();
  ~JPEG2000Codec() override;

  bool CanDecode(TransferSyntax const &ts) const override;
  bool CanCode(TransferSyntax const &ts) const override;

  bool Decode(DataElement const &is, DataElement &os) override;
  bool Code(DataElement const &in, DataElement &out) override;

  bool GetHeaderInfo(std::istream &is, TransferSyntax &ts) override;
  ImageCodec * Clone() const override;

  // JPEG-2000 / OpenJPEG specific way of encoding lossy-ness
  // ref: http://www.openjpeg.org/index.php?menu=doc#encoder
  void SetRate(unsigned int idx, double rate);
  double GetRate(unsigned int idx = 0) const;

  void SetQuality(unsigned int idx, double q);
  double GetQuality(unsigned int idx = 0) const;

  void SetTileSize(unsigned int tx, unsigned int ty);

  void SetNumberOfResolutions(unsigned int nres);

  /// Set Number of threads
  /// @param nThreads : number of threads for decompression codec, if 0 or 1 decompression is done in current thread, if negative value is set determine how many virtual threads are available
  void SetNumberOfThreadsForDecompression(int nThreads);

  void SetReversible(bool res);
  void SetMCT(unsigned int mct);

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 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:
  std::pair<char *, size_t> DecodeByStreamsCommon(char *dummy_buffer, size_t buf_size);
  bool CodeFrameIntoBuffer(char * outdata, size_t outlen, size_t & complen, const char * indata, size_t inlen );
  bool GetHeaderInfo(const char * dummy_buffer, size_t len, TransferSyntax &ts);
  JPEG2000Internals *Internals;
};

} // end namespace gdcm

#endif //GDCMJPEG2000CODEC_H