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/*
* dxr3tools.h
*
* Copyright (C) 2004 Christian Gmeiner
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef _DXR3TOOLS_H_
#define _DXR3TOOLS_H_
#include <string>
#include <vdr/status.h>
namespace Tools
{
// ==================================
//! convert Rgb to CrCb
inline unsigned int Rgb2YCrCb(unsigned long rgb)
{
float Y,U,V;
float R,G,B;
unsigned int yuv = 0x0;
B = ((rgb >> 16) & 0xFF);
G = ((rgb >> 8) & 0xFF);
R = (rgb & 0xFF);
Y = (0.2578125 * R) + (0.50390625 * G) + (0.09765625 * B) + 16;
U = (0.4375 * R) - (0.3671875 * G) - (0.0703125 * B) + 128;
V =-(0.1484375 * R) - (0.2890625 * G) + (0.4375 * B) + 128;
yuv = (int(Y) << 16) | (int(U) << 8) | int(V);
return yuv;
}
// ==================================
//! convert YUV to Rgb
inline unsigned int YUV2Rgb(unsigned int yuv_color)
{
int Y, Cb, Cr;
int Ey, Epb, Epr;
int Eg, Eb, Er;
Y = (yuv_color >> 16) & 0xff;
Cb = (yuv_color) & 0xff;
Cr = (yuv_color >> 8) & 0xff;
Ey = (Y - 16);
Epb = (Cb - 128);
Epr = (Cr - 128);
/* ITU-R 709
Eg = (298*Ey - 55*Epb - 137*Epr)/256;
Eb = (298*Ey + 543*Epb)/256;
Er = (298*Ey + 460*Epr)/256;
*/
/* FCC ~= mediaLib */
Eg = (298 * Ey - 100 * Epb - 208 * Epr) / 256;
Eb = (298 * Ey + 516 * Epb) / 256;
Er = (298 * Ey + 408 * Epr) / 256;
if (Eg > 255)
Eg = 255;
if (Eg < 0)
Eg = 0;
if (Eb > 255)
Eb = 255;
if (Eb < 0)
Eb = 0;
if (Er > 255)
Er = 255;
if (Er < 0)
Er = 0;
return Eb | (Eg << 8) | (Er << 16);
}
// ==================================
//! write a string via vdr to OSD
inline void WriteInfoToOsd(std::string x)
{
Skins.Message(mtInfo, x.c_str());
}
}
#endif /*_DXR3TOOLS_H_*/
// Local variables:
// mode: c++
// c-file-style: "stroustrup"
// c-file-offsets: ((inline-open . 0))
// c-basic-offset: 4
// indent-tabs-mode: nil
// End:
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