/usr/include/dcmtk/dcmimage/diyp2pxt.h is in libdcmtk-dev 3.6.1~20160216-4.
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*
* Copyright (C) 1998-2011, 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: DicomYBRPart422PixelTemplate (Header)
*
*/
#ifndef DIYP2PXT_H
#define DIYP2PXT_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 Partial 4:2:2 pixel data
*/
template<class T1, class T2>
class DiYBRPart422PixelTemplate
: 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 bits number of bits per sample
*/
DiYBRPart422PixelTemplate(const DiDocument *docu,
const DiInputPixel *pixel,
EI_Status &status,
const int bits)
: DiColorPixelTemplate<T2>(docu, pixel, 3, status, 2)
{
if ((pixel != NULL) && (this->Count > 0) && (status == EIS_Normal))
{
if (this->PlanarConfiguration)
{
status = EIS_InvalidValue;
DCMIMAGE_ERROR("invalid value for 'PlanarConfiguration' (" << this->PlanarConfiguration << ")");
}
else
convert(OFstatic_cast(const T1 *, pixel->getData()) + pixel->getPixelStart(), bits);
}
}
/** destructor
*/
virtual ~DiYBRPart422PixelTemplate()
{
}
private:
/** convert input pixel data to intermediate representation
*
** @param pixel pointer to input pixel data
* @param bits number of bits per sample
*/
void convert(const T1 *pixel,
const int bits)
{
if (this->Init(pixel))
{
register T2 *r = this->Data[0];
register T2 *g = this->Data[1];
register T2 *b = this->Data[2];
register unsigned long i;
const T2 maxvalue = OFstatic_cast(T2, DicomImageClass::maxval(bits));
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;
register const T1 *p = pixel;
register T2 y1;
register T2 y2;
register T2 cb;
register T2 cr;
for (i = count / 2; i != 0; --i)
{
y1 = removeSign(*(p++), offset);
y2 = removeSign(*(p++), offset);
cb = removeSign(*(p++), offset);
cr = removeSign(*(p++), offset);
convertValue(*(r++), *(g++), *(b++), y1, cb, cr, maxvalue);
convertValue(*(r++), *(g++), *(b++), y2, cb, cr, maxvalue);
}
}
}
/** 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 = 1.1631 * OFstatic_cast(double, y) + 1.5969 * OFstatic_cast(double, cr) - 0.8713 * OFstatic_cast(double, maxvalue);
double dg = 1.1631 * OFstatic_cast(double, y) - 0.3913 * OFstatic_cast(double, cb) - 0.8121 * OFstatic_cast(double, cr) + 0.5290 * OFstatic_cast(double, maxvalue);
double db = 1.1631 * OFstatic_cast(double, y) + 2.0177 * OFstatic_cast(double, cb) - 1.0820 * 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
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