SourceCodeSky

/************************************************************************
 *
 *  yuvrgb24.c, colour space conversion for tmndecode (H.263 decoder)
 *  Copyright (C) 1996  Telenor R&D, Norway
 *        Karl Olav Lillevold <Karl.Lillevold@nta.no>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  Karl Olav Lillevold               <Karl.Lillevold@nta.no>
 *  Telenor Research and Development
 *  P.O.Box 83                        tel.:   +47 63 84 84 00
 *  N-2007 Kjeller, Norway            fax.:   +47 63 81 00 76
 *
 *  Robert Danielsen                  e-mail: Robert.Danielsen@nta.no
 *  Telenor Research and Development  www:    http://www.nta.no/brukere/DVC/
 *  P.O.Box 83                        tel.:   +47 63 84 84 00
 *  N-2007 Kjeller, Norway            fax.:   +47 63 81 00 76
 *  
 ************************************************************************/

#include "DGlobal.h"


/* Data for ConvertYUVtoRGB*/


long int crv_tab[256];
long int cbu_tab[256];
long int cgu_tab[256];

long int cgv_tab[256];
long int tab_76309[256];


/**
*   Init Routine...
*   This must be invoked only once before calling conversion routine
*/

void init_dither_tab()
{
  long int crv,cbu,cgu,cgv;
  int i;   
  
  crv = 104597; cbu = 132201;  /* fra matrise i global.h */
  cgu = 25675;  cgv = 53279;
  
  for (i = 0; i < 256; i++) {
    crv_tab[i] = (i-128) * crv;
    cbu_tab[i] = (i-128) * cbu;
    cgu_tab[i] = (i-128) * cgu;
    cgv_tab[i] = (i-128) * cgv;
    tab_76309[i] = 76309*(i-16);
  }
}


            
/**********************************************************************
 *
 *    Name:             ConvertYUVtoRGB    
 *    Description:     Converts YUV image to RGB (packed mode)
 *    
 *    Input:             pointer to source luma, Cr, Cb, destination,
 *                       image width and height
 *    Returns:       
 *    Side effects:
 *
 *    Date: 951208    Author: Karl.Lillevold@nta.no
 *
 ***********************************************************************/



void ConvertYUVtoRGB(unsigned char *src0,unsigned char *src1,unsigned char *src2,unsigned char *dst_ori,int width,int height)
{       
  extern long int crv_tab[];
  extern long int cbu_tab[];
  extern long int cgu_tab[];

  extern long int cgv_tab[];
  extern long int tab_7[!==More==!]