dcpixel.h

/*
 *
 *  Copyright (C) 1994-2004, 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:  dcmdata
 *
 *  Author:  Andreas Barth
 *
 *  Purpose: Interface of class DcmPixelData
 *
 *  Last Update:      $Author: meichel $
 *  Update Date:      $Date: 2004/04/07 13:55:56 $
 *  CVS/RCS Revision: $Revision: 1.25 $
 *  Status:           $State: Exp $
 *
 *  CVS/RCS Log at end of file
 *
 */

#ifndef DCPIXEL_H
#define DCPIXEL_H

#include "osconfig.h"    /* make sure OS specific configuration is included first */

#include "ofconsol.h"
#include "dcvrpobw.h"
#include "oflist.h"

class DcmCodec;
class DcmCodecList;
class DcmStack;
class DcmPixelSequence;
class DcmPixelData;
class DcmRepresentationEntry;


class DcmRepresentationParameter
{
public:
    DcmRepresentationParameter() {}

    DcmRepresentationParameter(const DcmRepresentationParameter&) {}

    virtual ~DcmRepresentationParameter() {}

    virtual DcmRepresentationParameter *clone() const = 0;

    virtual const char *className() const = 0;

    virtual OFBool operator==(const DcmRepresentationParameter &arg) const = 0;
};


class DcmRepresentationEntry
{
    DcmRepresentationEntry(
        const E_TransferSyntax rt,
        const DcmRepresentationParameter * rp,
        DcmPixelSequence * pixSeq);

    DcmRepresentationEntry(const DcmRepresentationEntry &oldEntry);

    ~DcmRepresentationEntry();

    OFBool operator==(const DcmRepresentationEntry& x) const;

    OFBool operator!=(const DcmRepresentationEntry & x) const
    {
      return !(*this == x);
    }

private:
    DcmRepresentationEntry &operator=(const DcmRepresentationEntry &);

    E_TransferSyntax repType;

    DcmRepresentationParameter * repParam;

    DcmPixelSequence * pixSeq;

    friend class DcmPixelData;
};

typedef OFList<DcmRepresentationEntry *> DcmRepresentationList;
typedef OFListIterator(DcmRepresentationEntry *) DcmRepresentationListIterator;
typedef OFListConstIterator(DcmRepresentationEntry *) DcmRepresentationListConstIterator;

class DcmPixelData : public DcmPolymorphOBOW
{
private:
    friend class DcmRepresentationEntry;

    DcmRepresentationList repList;

    DcmRepresentationListIterator repListEnd;

    DcmRepresentationListIterator original;

    DcmRepresentationListIterator current;

    OFBool existUnencapsulated;

    OFBool isIconImage;
    
    DcmEVR unencapsulatedVR;

    DcmPixelSequence * pixelSeqForWrite;

    void clearRepresentationList(
        DcmRepresentationListIterator leaveInList);

    OFCondition findConformingEncapsulatedRepresentation(
        const DcmXfer & repType,
        const DcmRepresentationParameter * repParam,
        DcmRepresentationListIterator & result);

    OFCondition findRepresentationEntry(
        const DcmRepresentationEntry & findEntry,
        DcmRepresentationListIterator & result);

    DcmRepresentationListIterator insertRepresentationEntry(
        DcmRepresentationEntry * repEntry);

    OFCondition decode(
        const DcmXfer & fromType,
        const DcmRepresentationParameter * fromParam,
        DcmPixelSequence * fromPixSeq,
        DcmStack & pixelStack);

    OFCondition encode(
        const DcmXfer & fromType,
        const DcmRepresentationParameter * fromParam,
        DcmPixelSequence * fromPixSeq,
        const DcmXfer & toType,
        const DcmRepresentationParameter *toParam,
        DcmStack & pixelStack);

    void recalcVR()
    {
        if (current == repList.end()) Tag.setVR(unencapsulatedVR);
        else Tag.setVR(EVR_OB);
    }

public:
    DcmPixelData(const DcmTag & tag, const Uint32 len = 0);
    DcmPixelData(const DcmPixelData & pixelData);
    virtual ~DcmPixelData();

    DcmPixelData &operator=(const DcmPixelData &obj);

    virtual OFCondition setVR(DcmEVR vr);
    virtual DcmEVR ident() const { return EVR_PixelData; }

    virtual void print(ostream &out,
                       const size_t flags = 0,
                       const int level = 0,
                       const char *pixelFileName = NULL,
                       size_t *pixelCounter = NULL);

    virtual OFBool canWriteXfer(const E_TransferSyntax newXfer,
                                const E_TransferSyntax oldXfer);

    virtual Uint32 calcElementLength(const E_TransferSyntax xfer,
                                     const E_EncodingType enctype);

    virtual Uint32 getLength(
        const E_TransferSyntax xfer  = EXS_LittleEndianImplicit,
        const E_EncodingType enctype = EET_UndefinedLength);

    virtual void transferInit();

    virtual OFCondition read(DcmInputStream & inStream,
                             const E_TransferSyntax ixfer,
                             const E_GrpLenEncoding glenc = EGL_noChange,
                             const Uint32 maxReadLength = DCM_MaxReadLength);

    virtual OFCondition write(
        DcmOutputStream & outStream,
        const E_TransferSyntax oxfer,
        const E_EncodingType enctype = EET_UndefinedLength);

    virtual OFCondition writeXML(ostream &out,
                                 const size_t flags = 0);

    virtual OFCondition writeSignatureFormat(
        DcmOutputStream & outStream,
    const E_TransferSyntax oxfer,
    const E_EncodingType enctype = EET_UndefinedLength);

    virtual OFCondition loadAllDataIntoMemory(void);

    virtual void transferEnd();

    OFBool canChooseRepresentation(
        const E_TransferSyntax repType,
        const DcmRepresentationParameter * repParam);

    OFCondition chooseRepresentation(
        const E_TransferSyntax repType,
        const DcmRepresentationParameter * repParam,
        DcmStack & stack);

    void putOriginalRepresentation(
        const E_TransferSyntax repType,
        const DcmRepresentationParameter * repParam,
        DcmPixelSequence * pixSeq);

    virtual OFCondition putUint8Array(
        const Uint8 * byteValue,
        const unsigned long length);

    virtual OFCondition putUint16Array(
        const Uint16 * wordValue,
        const unsigned long length);

    virtual OFCondition createUint8Array(
        const Uint32 numBytes,
        Uint8 * & bytes);

    virtual OFCondition createUint16Array(
        const Uint32 numWords,
        Uint16 * & words);

    OFCondition getEncapsulatedRepresentation(
        const E_TransferSyntax repType,
        const DcmRepresentationParameter * repParam,
        DcmPixelSequence * & pixSeq);

    void getOriginalRepresentationKey(
        E_TransferSyntax & repType,
        const DcmRepresentationParameter * & repParam);

    void getCurrentRepresentationKey(
        E_TransferSyntax & repType,
        const DcmRepresentationParameter * & repParam);

    OFCondition setCurrentRepresentationParameter(
        const DcmRepresentationParameter * repParam);

    OFBool hasRepresentation(
        const E_TransferSyntax repType,
        const DcmRepresentationParameter * repParam = NULL);

    OFCondition removeRepresentation(
        const E_TransferSyntax repType,
        const DcmRepresentationParameter * repParam);

    void removeAllButOriginalRepresentations();

    void removeAllButCurrentRepresentations();

    OFCondition removeOriginalRepresentation(
        const E_TransferSyntax repType,
        const DcmRepresentationParameter * repParam);
};

#endif


/*
** CVS/RCS Log:
** $Log: dcpixel.h,v $
** Revision 1.25  2004/04/07 13:55:56  meichel
** Compressed image datasets containing uncompressed icon images
**   are now correctly handled by the parser.
**
** Revision 1.24  2004/01/16 14:06:20  joergr
** Removed acknowledgements with e-mail addresses from CVS log.
**
** Revision 1.23  2003/06/12 18:21:24  joergr
** Modified code to use const_iterators where appropriate (required for STL).
**
** Revision 1.22  2003/06/12 14:03:24  joergr
** Fixed inconsistent API documentation reported by Doxygen.
**
** Revision 1.21  2003/06/02 16:55:34  meichel
** Cleaned up implementation of DcmRepresentationEntry, added doc++ comments
**
** Revision 1.20  2003/04/17 15:56:59  joergr
** Corrected API documentation of createUint8/16Array() methods.
**
** Revision 1.19  2003/04/01 12:35:12  joergr
** Added implementation of createUint8/16Array() methods to DcmPixelData.
** Required to work properly with chooseRepresentation() for pixel compression.
**
** Revision 1.18  2002/12/09 09:31:16  wilkens
** Modified/Added doc++ documentation.
**
** Revision 1.17  2002/12/06 12:49:12  joergr
** Enhanced "print()" function by re-working the implementation and replacing
** the boolean "showFullData" parameter by a more general integer flag.
** Added doc++ documentation.
** Made source code formatting more consistent with other modules/files.
**
** Revision 1.16  2002/08/27 16:55:37  meichel
** Initial release of new DICOM I/O stream classes that add support for stream
**   compression (deflated little endian explicit VR transfer syntax)
**
** Revision 1.15  2002/04/25 09:38:48  joergr
** Added support for XML output of DICOM objects.
**
** Revision 1.14  2001/09/25 17:18:34  meichel
** Updated abstract class DcmRepresentationParameter for use with dcmjpeg
**
** Revision 1.13  2001/06/01 15:48:42  meichel
** Updated copyright header
**
** Revision 1.12  2000/11/07 16:56:08  meichel
** Initial release of dcmsign module for DICOM Digital Signatures
**
** Revision 1.11  2000/09/27 08:19:55  meichel
** Minor changes in DcmCodec interface, required for future dcmjpeg module.
**
** Revision 1.10  2000/04/14 15:31:33  meichel
** Removed default value from output stream passed to print() method.
**   Required for use in multi-thread environments.
**
** Revision 1.9  2000/03/08 16:26:17  meichel
** Updated copyright header.
**
** Revision 1.8  2000/03/03 14:05:25  meichel
** Implemented library support for redirecting error messages into memory
**   instead of printing them to stdout/stderr for GUI applications.
**
** Revision 1.7  2000/02/10 10:50:52  joergr
** Added new feature to dcmdump (enhanced print method of dcmdata): write
** pixel data/item value fields to raw files.
**
** Revision 1.6  2000/02/03 16:28:10  joergr
** Fixed bug: encapsulated data (pixel items) have never been loaded using
** method 'loadAllDataIntoMemory'. Therefore, encapsulated pixel data was
** never printed with 'dcmdump'.
**
** Revision 1.5  1999/03/31 09:24:44  meichel
** Updated copyright header in module dcmdata
**
** Revision 1.4  1998/11/12 16:47:42  meichel
** Implemented operator= for all classes derived from DcmObject.
**
** Revision 1.3  1998/07/15 15:48:50  joergr
** Removed several compiler warnings reported by gcc 2.8.1 with
** additional options, e.g. missing copy constructors and assignment
** operators, initialization of member variables in the body of a
** constructor instead of the member initialization list, hiding of
** methods by use of identical names, uninitialized member variables,
** missing const declaration of char pointers. Replaced tabs by spaces.
**
** Revision 1.2  1997/07/24 13:08:24  andreas
** - Removed const for method DcmRepresentationParameter::copy
**
** Revision 1.1  1997/07/21 07:54:57  andreas
** - New environment for encapsulated pixel representations. DcmPixelData
**   can contain different representations and uses codecs to convert
**   between them. Codecs are derived from the DcmCodec class. New error
**   codes are introduced for handling of representations. New internal
**   value representation (only for ident()) for PixelData
**
*/

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