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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 GDCMIMAGECHANGETRANSFERSYNTAX_H
#define GDCMIMAGECHANGETRANSFERSYNTAX_H

#include "gdcmImageToImageFilter.h"
#include "gdcmTransferSyntax.h"

namespace gdcm
{

class DataElement;
class ImageCodec;
/**
 * \brief ImageChangeTransferSyntax class
 * Class to change the transfer syntax of an input DICOM
 *
 * If only Force param is set but no input TransferSyntax is set, it is assumed
 * that user only wants to inspect encapsulated stream (advanced dev. option).
 *
 * When using UserCodec it is very important that the TransferSyntax (as set in
 * SetTransferSyntax) is actually understood by UserCodec (ie.
 * UserCodec->CanCode( TransferSyntax ) ). Otherwise the behavior is to use a
 * default codec.
 *
 * \sa JPEGCodec JPEGLSCodec JPEG2000Codec
 */
class GDCM_EXPORT ImageChangeTransferSyntax : public ImageToImageFilter
{
public:
  ImageChangeTransferSyntax():TS(TransferSyntax::TS_END),Force(false),CompressIconImage(false),UserCodec(0) {}
  ~ImageChangeTransferSyntax() {}

  /// Set target Transfer Syntax
  void SetTransferSyntax(const TransferSyntax &ts) { TS = ts; }
  /// Get Transfer Syntax
  const TransferSyntax &GetTransferSyntax() const { return TS; }

  /// Change
  bool Change();

  /// Decide whether or not to also compress the Icon Image using the same
  /// Transfer Syntax.  Default is to simply decompress icon image
  void SetCompressIconImage(bool b) { CompressIconImage = b; }

  /// When target Transfer Syntax is identical to input target syntax, no
  /// operation is actually done.
  /// This is an issue when someone wants to re-compress using GDCM internal
  /// implementation a JPEG (for example) image
  void SetForce( bool f ) { Force = f; }

  /// Allow user to specify exactly which codec to use. this is needed to
  /// specify special qualities or compression option.
  /// \warning if the codec 'ic' is not compatible with the TransferSyntax
  /// requested, it will not be used. It is the user responsibility to check
  /// that UserCodec->CanCode( TransferSyntax )
  void SetUserCodec(ImageCodec *ic) { UserCodec = ic; }

protected:
  bool TryJPEGCodec(const DataElement &pixelde, Bitmap const &input, Bitmap &output);
  bool TryJPEG2000Codec(const DataElement &pixelde, Bitmap const &input, Bitmap &output);
  bool TryJPEGLSCodec(const DataElement &pixelde, Bitmap const &input, Bitmap &output);
  bool TryRAWCodec(const DataElement &pixelde, Bitmap const &input, Bitmap &output);
  bool TryRLECodec(const DataElement &pixelde, Bitmap const &input, Bitmap &output);

private:
  TransferSyntax TS;
  bool Force;
  bool CompressIconImage;

  ImageCodec *UserCodec;
};

/**
 * \example StandardizeFiles.cs
 * This is a C++ example on how to use ImageChangeTransferSyntax
 */

} // end namespace gdcm

#endif //GDCMIMAGECHANGETRANSFERSYNTAX_H