/usr/include/dcmtk/dcmimage/diybrpxt.h is in libdcmtk2-dev 3.6.0-9.
This file is owned by root:root, with mode 0o644.
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*
* Copyright (C) 1998-2010, OFFIS e.V.
* All rights reserved. See COPYRIGHT file for details.
*
* This software and supporting documentation were developed by
*
* OFFIS e.V.
* R&D Division Health
* Escherweg 2
* D-26121 Oldenburg, Germany
*
*
* Module: dcmimage
*
* Author: Joerg Riesmeier
*
* Purpose: DicomYBRPixelTemplate (Header)
*
* Last Update: $Author: joergr $
* Update Date: $Date: 2010-10-14 13:16:30 $
* CVS/RCS Revision: $Revision: 1.19 $
* Status: $State: Exp $
*
* CVS/RCS Log at end of file
*
*/
#ifndef DIYBRPXT_H
#define DIYBRPXT_H
#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmimage/dicopxt.h"
#include "dcmtk/dcmimgle/diinpx.h" /* gcc 3.4 needs this */
/*---------------------*
* class declaration *
*---------------------*/
/** Template class to handle YCbCr pixel data
*/
template<class T1, class T2>
class DiYBRPixelTemplate
: public DiColorPixelTemplate<T2>
{
public:
/** constructor
*
** @param docu pointer to DICOM document
* @param pixel pointer to input pixel representation
* @param status reference to status variable
* @param planeSize number of pixels in a plane
* @param bits number of bits per sample
* @param rgb flag, convert color model to RGB only if true
*/
DiYBRPixelTemplate(const DiDocument *docu,
const DiInputPixel *pixel,
EI_Status &status,
const unsigned long planeSize,
const int bits,
const OFBool rgb)
: DiColorPixelTemplate<T2>(docu, pixel, 3, status)
{
if ((pixel != NULL) && (this->Count > 0) && (status == EIS_Normal))
convert(OFstatic_cast(const T1 *, pixel->getData()) + pixel->getPixelStart(), planeSize, bits, rgb);
}
/** destructor
*/
virtual ~DiYBRPixelTemplate()
{
}
private:
/** convert input pixel data to intermediate representation
*
** @param pixel pointer to input pixel data
* @param planeSize number of pixels in a plane
* @param bits number of bits per sample
* @param rgb flag, convert color model to RGB only if true
*/
void convert(const T1 *pixel,
const unsigned long planeSize,
const int bits,
const OFBool rgb)
{
if (Init(pixel))
{
const T1 offset = OFstatic_cast(T1, DicomImageClass::maxval(bits - 1));
// use the number of input pixels derived from the length of the 'PixelData'
// attribute), but not more than the size of the intermediate buffer
const unsigned long count = (this->InputCount < this->Count) ? this->InputCount : this->Count;
if (rgb) /* convert to RGB model */
{
register T2 *r = this->Data[0];
register T2 *g = this->Data[1];
register T2 *b = this->Data[2];
const T2 maxvalue = OFstatic_cast(T2, DicomImageClass::maxval(bits));
DiPixelRepresentationTemplate<T1> rep;
if (bits == 8 && !rep.isSigned()) // only for unsigned 8 bit
{
Sint16 rcr_tab[256];
Sint16 gcb_tab[256];
Sint16 gcr_tab[256];
Sint16 bcb_tab[256];
const double r_const = 0.7010 * OFstatic_cast(double, maxvalue);
const double g_const = 0.5291 * OFstatic_cast(double, maxvalue);
const double b_const = 0.8859 * OFstatic_cast(double, maxvalue);
register unsigned long l;
for (l = 0; l < 256; ++l)
{
rcr_tab[l] = OFstatic_cast(Sint16, 1.4020 * OFstatic_cast(double, l) - r_const);
gcb_tab[l] = OFstatic_cast(Sint16, 0.3441 * OFstatic_cast(double, l));
gcr_tab[l] = OFstatic_cast(Sint16, 0.7141 * OFstatic_cast(double, l) - g_const);
bcb_tab[l] = OFstatic_cast(Sint16, 1.7720 * OFstatic_cast(double, l) - b_const);
}
register Sint32 sr;
register Sint32 sg;
register Sint32 sb;
if (this->PlanarConfiguration)
{
/*
register const T1 *y = pixel;
register const T1 *cb = y + this->InputCount;
register const T1 *cr = cb + this->InputCount;
for (i = count; i != 0; --i, ++y, ++cb, ++cr)
{
sr = OFstatic_cast(Sint32, *y) + OFstatic_cast(Sint32, rcr_tab[*cr]);
sg = OFstatic_cast(Sint32, *y) - OFstatic_cast(Sint32, gcb_tab[*cb]) - OFstatic_cast(Sint32, gcr_tab[*cr]);
sb = OFstatic_cast(Sint32, *y) + OFstatic_cast(Sint32, bcb_tab[*cb]);
*(r++) = (sr < 0) ? 0 : (sr > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sr);
*(g++) = (sg < 0) ? 0 : (sg > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sg);
*(b++) = (sb < 0) ? 0 : (sb > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sb);
}
*/
register const T1 *y = pixel;
register const T1 *cb = y + planeSize;
register const T1 *cr = cb + planeSize;
register unsigned long i = count;
while (i != 0)
{
/* convert a single frame */
for (l = planeSize; (l != 0) && (i != 0); --l, --i, ++y, ++cb, ++cr)
{
sr = OFstatic_cast(Sint32, *y) + OFstatic_cast(Sint32, rcr_tab[OFstatic_cast(Uint32, *cr)]);
sg = OFstatic_cast(Sint32, *y) - OFstatic_cast(Sint32, gcb_tab[OFstatic_cast(Uint32, *cb)]) - OFstatic_cast(Sint32, gcr_tab[OFstatic_cast(Uint32, *cr)]);
sb = OFstatic_cast(Sint32, *y) + OFstatic_cast(Sint32, bcb_tab[OFstatic_cast(Uint32, *cb)]);
*(r++) = (sr < 0) ? 0 : (sr > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sr);
*(g++) = (sg < 0) ? 0 : (sg > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sg);
*(b++) = (sb < 0) ? 0 : (sb > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sb);
}
/* jump to next frame start (skip 2 planes) */
y += 2 * planeSize;
cb += 2 * planeSize;
cr += 2 * planeSize;
}
}
else
{
register const T1 *p = pixel;
register T1 y;
register T1 cb;
register T1 cr;
register unsigned long i;
for (i = count; i != 0; --i)
{
y = *(p++);
cb = *(p++);
cr = *(p++);
sr = OFstatic_cast(Sint32, y) + OFstatic_cast(Sint32, rcr_tab[OFstatic_cast(Uint32, cr)]);
sg = OFstatic_cast(Sint32, y) - OFstatic_cast(Sint32, gcb_tab[OFstatic_cast(Uint32, cb)]) - OFstatic_cast(Sint32, gcr_tab[OFstatic_cast(Uint32, cr)]);
sb = OFstatic_cast(Sint32, y) + OFstatic_cast(Sint32, bcb_tab[OFstatic_cast(Uint32, cb)]);
*(r++) = (sr < 0) ? 0 : (sr > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sr);
*(g++) = (sg < 0) ? 0 : (sg > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sg);
*(b++) = (sb < 0) ? 0 : (sb > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sb);
}
}
}
else
{
if (this->PlanarConfiguration)
{
/*
register const T1 *y = pixel;
register const T1 *cb = y + this->InputCount;
register const T1 *cr = cb + this->InputCount;
for (i = count; i != 0; --i)
convertValue(*(r++), *(g++), *(b++), removeSign(*(y++), offset), removeSign(*(cb++), offset),
removeSign(*(cr++), offset), maxvalue);
*/
register unsigned long l;
register unsigned long i = count;
register const T1 *y = pixel;
register const T1 *cb = y + planeSize;
register const T1 *cr = cb + planeSize;
while (i != 0)
{
/* convert a single frame */
for (l = planeSize; (l != 0) && (i != 0); --l, --i)
{
convertValue(*(r++), *(g++), *(b++), removeSign(*(y++), offset), removeSign(*(cb++), offset),
removeSign(*(cr++), offset), maxvalue);
}
/* jump to next frame start (skip 2 planes) */
y += 2 * planeSize;
cb += 2 * planeSize;
cr += 2 * planeSize;
}
}
else
{
register const T1 *p = pixel;
register T2 y;
register T2 cb;
register T2 cr;
register unsigned long i;
for (i = count; i != 0; --i)
{
y = removeSign(*(p++), offset);
cb = removeSign(*(p++), offset);
cr = removeSign(*(p++), offset);
convertValue(*(r++), *(g++), *(b++), y, cb, cr, maxvalue);
}
}
}
} else { /* retain YCbCr model */
register const T1 *p = pixel;
if (this->PlanarConfiguration)
{
/*
register T2 *q;
// number of pixels to be skipped (only applicable if 'PixelData' contains more
// pixels than expected)
const unsigned long skip = (this->InputCount > this->Count) ? (this->InputCount - this->Count) : 0;
for (int j = 0; j < 3; ++j)
{
q = this->Data[j];
for (i = count; i != 0; --i)
*(q++) = removeSign(*(p++), offset);
// skip to beginning of next plane
p += skip;
}
*/
register unsigned long l;
register unsigned long i = 0;
while (i < count)
{
/* store current pixel index */
const unsigned long iStart = i;
for (int j = 0; j < 3; ++j)
{
/* convert a single plane */
for (l = planeSize, i = iStart; (l != 0) && (i < count); --l, ++i)
this->Data[j][i] = removeSign(*(p++), offset);
}
}
}
else
{
register int j;
register unsigned long i;
for (i = 0; i < count; ++i) /* for all pixel ... */
for (j = 0; j < 3; ++j)
this->Data[j][i] = removeSign(*(p++), offset); /* ... copy planes */
}
}
}
}
/** convert a single YCbCr value to RGB
*/
inline void convertValue(T2 &red, T2 &green, T2 &blue, const T2 y, const T2 cb, const T2 cr, const T2 maxvalue)
{
double dr = OFstatic_cast(double, y) + 1.4020 * OFstatic_cast(double, cr) - 0.7010 * OFstatic_cast(double, maxvalue);
double dg = OFstatic_cast(double, y) - 0.3441 * OFstatic_cast(double, cb) - 0.7141 * OFstatic_cast(double, cr) + 0.5291 * OFstatic_cast(double, maxvalue);
double db = OFstatic_cast(double, y) + 1.7720 * OFstatic_cast(double, cb) - 0.8859 * OFstatic_cast(double, maxvalue);
red = (dr < 0.0) ? 0 : (dr > OFstatic_cast(double, maxvalue)) ? maxvalue : OFstatic_cast(T2, dr);
green = (dg < 0.0) ? 0 : (dg > OFstatic_cast(double, maxvalue)) ? maxvalue : OFstatic_cast(T2, dg);
blue = (db < 0.0) ? 0 : (db > OFstatic_cast(double, maxvalue)) ? maxvalue : OFstatic_cast(T2, db);
}
};
#endif
/*
*
* CVS/RCS Log:
* $Log: diybrpxt.h,v $
* Revision 1.19 2010-10-14 13:16:30 joergr
* Updated copyright header. Added reference to COPYRIGHT file.
*
* Revision 1.18 2010-03-01 09:08:46 uli
* Removed some unnecessary include directives in the headers.
*
* Revision 1.17 2005-12-08 16:02:01 meichel
* Changed include path schema for all DCMTK header files
*
* Revision 1.16 2004/04/21 10:00:31 meichel
* Minor modifications for compilation with gcc 3.4.0
*
* Revision 1.15 2004/02/06 11:16:35 joergr
* Added typecast to array indexes to avoid warning messages on MacOS X 10.3
* with gcc 3.3.
*
* Revision 1.14 2003/12/23 12:30:34 joergr
* Adapted type casts to new-style typecast operators defined in ofcast.h.
* Removed leading underscore characters from preprocessor symbols (reserved
* symbols). Updated copyright header.
* Replaced post-increment/decrement operators by pre-increment/decrement
* operators where appropriate (e.g. 'i++' by '++i').
*
* Revision 1.13 2002/06/26 16:20:19 joergr
* Enhanced handling of corrupted pixel data and/or length.
* Corrected decoding of multi-frame, planar images.
*
* Revision 1.12 2001/11/09 16:47:03 joergr
* Removed 'inline' specifier from certain methods.
*
* Revision 1.11 2001/09/28 13:55:41 joergr
* Added new flag (CIF_KeepYCbCrColorModel) which avoids conversion of YCbCr
* color models to RGB.
*
* Revision 1.10 2001/06/01 15:49:32 meichel
* Updated copyright header
*
* Revision 1.9 2000/04/27 13:15:15 joergr
* Dcmimage library code now consistently uses ofConsole for error output.
*
* Revision 1.8 2000/03/08 16:21:54 meichel
* Updated copyright header.
*
* Revision 1.7 1999/09/17 14:03:46 joergr
* Enhanced efficiency of some "for" loops.
*
* Revision 1.6 1999/04/28 12:52:04 joergr
* Corrected some typos, comments and formatting.
*
* Revision 1.5 1999/02/03 16:55:29 joergr
* Moved global functions maxval() and determineRepresentation() to class
* DicomImageClass (as static methods).
*
* Revision 1.4 1999/01/20 14:47:20 joergr
* Replaced invocation of getCount() by member variable Count where possible.
*
* Revision 1.3 1998/11/27 14:18:56 joergr
* Added copyright message.
*
* Revision 1.2 1998/05/11 14:53:32 joergr
* Added CVS/RCS header to each file.
*
*
*/
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