djcodece.h

/*
 *
 *  Copyright (C) 1997-2005, OFFIS
 *
 *  This software and supporting documentation were developed by
 *
 *    Kuratorium OFFIS e.V.
 *    Healthcare Information and Communication Systems
 *    Escherweg 2
 *    D-26121 Oldenburg, Germany
 *
 *  THIS SOFTWARE IS MADE AVAILABLE,  AS IS,  AND OFFIS MAKES NO  WARRANTY
 *  REGARDING  THE  SOFTWARE,  ITS  PERFORMANCE,  ITS  MERCHANTABILITY  OR
 *  FITNESS FOR ANY PARTICULAR USE, FREEDOM FROM ANY COMPUTER DISEASES  OR
 *  ITS CONFORMITY TO ANY SPECIFICATION. THE ENTIRE RISK AS TO QUALITY AND
 *  PERFORMANCE OF THE SOFTWARE IS WITH THE USER.
 *
 *  Module:  dcmjpeg
 *
 *  Author:  Marco Eichelberg, Norbert Olges
 *
 *  Purpose: abstract codec class for JPEG encoders.
 *
 *  Last Update:      $Author: meichel $
 *  Update Date:      $Date: 2005/12/08 16:59:12 $
 *  Source File:      $Source: /share/dicom/cvs-depot/dcmtk/dcmjpeg/include/dcmtk/dcmjpeg/djcodece.h,v $
 *  CVS/RCS Revision: $Revision: 1.7 $
 *  Status:           $State: Exp $
 *
 *  CVS/RCS Log at end of file
 *
 */

#ifndef DJCODEC_H
#define DJCODEC_H

#include "dcmtk/config/osconfig.h"
#include "dcmtk/ofstd/oftypes.h"
#include "dcmtk/dcmdata/dccodec.h"    /* for class DcmCodec */
#include "dcmtk/dcmjpeg/djutils.h"    /* for enums */
#include "dcmtk/ofstd/oflist.h"
#include "dcmtk/ofstd/ofstring.h"   /* for class OFString */

class DataInterface;
class DJEncoder;
class DcmDataset;
class DJCodecParameter;
class DJDecoder;
class DcmItem;
class DcmPixelItem;
class DicomImage;
class DcmTagKey;


class DJCodecEncoder : public DcmCodec
{
public:

  DJCodecEncoder();

  virtual ~DJCodecEncoder();

  virtual OFCondition decode(
    const DcmRepresentationParameter * fromRepParam,
    DcmPixelSequence * pixSeq,
    DcmPolymorphOBOW& uncompressedPixelData,
    const DcmCodecParameter * cp,
    const DcmStack& objStack) const;

  virtual OFCondition encode(
    const Uint16 * pixelData,
    const Uint32 length,
    const DcmRepresentationParameter * toRepParam,
    DcmPixelSequence * & pixSeq,
    const DcmCodecParameter *cp,
    DcmStack & objStack) const;

  virtual OFCondition encode(
    const E_TransferSyntax fromRepType,
    const DcmRepresentationParameter * fromRepParam,
    DcmPixelSequence * fromPixSeq,
    const DcmRepresentationParameter * toRepParam,
    DcmPixelSequence * & toPixSeq,
    const DcmCodecParameter * cp,
    DcmStack & objStack) const;

  virtual OFBool canChangeCoding(
    const E_TransferSyntax oldRepType,
    const E_TransferSyntax newRepType) const;

  virtual E_TransferSyntax supportedTransferSyntax() const = 0;

protected:

  static void appendCompressionRatio(OFString& arg, double ratio);

  static OFCondition togglePlanarConfiguration8(
    Uint8 *pixelData,
    const unsigned long numValues,
    const Uint16 samplesPerPixel,
    const Uint16 oldPlanarConfig);

  static OFCondition togglePlanarConfiguration16(
    Uint16 *pixelData,
    const unsigned long numValues,
    const Uint16 samplesPerPixel,
    const Uint16 oldPlanarConfig);

private:

  virtual OFCondition encodeColorImage(
        OFBool YBRmode,
        DcmItem *dataset,
        const DcmRepresentationParameter * toRepParam,
        DcmPixelSequence * & pixSeq,
        const DJCodecParameter *cp,
        double& compressionRatio) const;

  virtual OFCondition encodeMonochromeImage(
        DcmItem *dataset,
        const DcmRepresentationParameter * toRepParam,
        DcmPixelSequence * & pixSeq,
        const DJCodecParameter *cp,
        double& compressionRatio) const;

  virtual OFCondition encodeTrueLossless(
    const DcmRepresentationParameter * toRepParam,
    DcmPixelSequence * & pixSeq,
    const DcmCodecParameter *cp,
    DcmStack & objStack) const;

  virtual OFCondition updateLossyCompressionRatio(DcmItem *dataset, double ratio) const;

  virtual OFCondition updateDerivationDescription(
      DcmItem *dataset,
      const DcmRepresentationParameter * toRepParam,
      const DJCodecParameter *cp,
      Uint8 bitsPerSample,
      double ratio) const;

  virtual OFCondition adjustOverlays(DcmItem *dataset, DicomImage& image) const;

  virtual OFBool isLosslessProcess() const = 0;

  virtual void createDerivationDescription(
    const DcmRepresentationParameter * toRepParam,
    const DJCodecParameter *cp,
    Uint8 bitsPerSample,
    double ratio,
    OFString& derivationDescription) const = 0;

  virtual DJEncoder *createEncoderInstance(
    const DcmRepresentationParameter * toRepParam,
    const DJCodecParameter *cp,
    Uint8 bitsPerSample) const = 0;

  static OFCondition correctVOIWindows(DcmItem *dataset, double voiOffset, double voiFactor);

  OFCondition updatePlanarConfiguration(
    DcmItem *item,
    const Uint16 newPlanConf) const;
};

#endif

/*
 * CVS/RCS Log
 * $Log: djcodece.h,v $
 * Revision 1.7  2005/12/08 16:59:12  meichel
 * Changed include path schema for all DCMTK header files
 *
 * Revision 1.6  2005/12/01 11:13:01  onken
 * Minor code modifications for gcc 4
 *
 * Revision 1.5  2005/11/29 11:00:40  onken
 * *** empty log message ***
 *
 * Revision 1.4  2005/11/29 08:50:34  onken
 * Added support for "true" lossless compression in dcmjpeg, that doesn't
 *   use dcmimage classes, but compresses raw pixel data (8 and 16 bit) to
 *   avoid losses in quality caused by color space conversions or modality
 *   transformations etc.
 * Corresponding commandline option in dcmcjpeg (new default)
 *
 * Revision 1.3  2003/07/04 13:26:22  meichel
 * Replaced forward declarations for OFString with explicit includes,
 *   needed when compiling with HAVE_STD_STRING
 *
 * Revision 1.2  2002/05/24 14:58:04  meichel
 * Moved helper methods that are useful for different compression techniques
 *   from module dcmjpeg to module dcmdata
 *
 * Revision 1.1  2001/11/13 15:56:16  meichel
 * Initial release of module dcmjpeg
 *
 *
 */

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