【VC开源代码栏目提醒】:网学会员--在 VC开源代码编辑为广大网友搜集整理了:YuvToRgb.cpp绩等信息,祝愿广大网友取得需要的信息,参考学习。
/************************************************************************
*
* 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_76309[];
int y11,y21;
int y12,y22;
int y13,y23;
int y14,y24;
int u,v;
int i,j;
int c11, c21, c31, c41;
int c12, c22, c32, c42;
unsigned int DW;
unsigned int *id1, *id2;
unsigned char *py1,*py2,*pu,*pv;
unsigned char *d1, *d2;
d1 = dst_ori;
d1 += width*height*3 - width*3;
d2 = d1 - width*3;
py1 = src0; pu = src1; pv = src2;
py2 = py1 + width;
id1 = (unsigned int *)d1;
id2 = (unsigned int *)d2;
for (j = 0; j < height; j += 2) {
/* line j + 0 */
for (i = 0; i < width; i += 4) {
u = *pu++;
v = *pv++;
c11 = crv_tab[v];
c21 = cgu_tab[u];
c31 = cgv_tab[v];
c41 = cbu_tab[u];
u = *pu++;
v = *pv++;
c12 = crv_tab[v];
c22 = cgu_tab[u];
c32 = cgv_tab[v];
c42 = cbu_tab[u];
y11 = tab_76309[*py1++]; /* (255/219)*65536 */
y12 = tab_76309[*py1++];
y13 = tab_76309[*py1++]; /* (255/219)*65536 */
y14 = tab_76309[*py1++];
y21 = tab_76309[*py2++];
y22 = tab_76309[*py2++];
y23 = tab_76309[*py2++];
y24 = tab_76309[*py2++];
/* RGBR*/
DW = ((clp[(y11 + c41)>>16])) |
((clp[(y11 - c21 - c31)>>16])<<8) |
((clp[(y11 + c11)>>16])<<16) |
((clp[(y12 + c41)>>16])<<24);
*id1++ = DW;
/* GBRG*/
DW = ((clp[(y12 - c21 - c31)>>16])) |
((clp[(y12 + c11)>>16])<<8) |
((clp[(y13 + c42)>>16])<<16) |
((clp[(y13 - c22 - c32)>>16])<<24);
*id1++ = DW;
/* BRGB*/
DW = ((clp[(y13 + c12)>>16])) |
((clp[(y14 + c42)>>16])<<8) |
((clp[(y14 - c22 - c32)>>16])<<16) |
((clp[(y14 + c12)>>16])<<24);
*id1++ = DW;
/* RGBR*/
DW = ((clp[(y21 + c41)>>16])) |
((clp[(y21 - c21 - c31)>>16])<<8) |
((clp[(y21 + c11)>>16])<<16) |
((clp[(y22 + c41)>>16])<<24);
*id2++ = DW;
/* GBRG*/
DW = ((clp[(y22 - c21 - c31)>>16])) |
((clp[(y22 + c11)>>16])<<8) |
((clp[(y23 + c42)>>16])<<16) |
((clp[(y23 - c22 - c32)>>16])<<24);
*id2++ = DW;
/* BRGB*/
DW = ((clp[(y23 + c12)>>16])) |
((clp[(y24 + c42)>>16])<<8) |
((clp[(y24 - c22 - c32)>>16])<<16) |
((clp[(y24 + c12)>>16])<<24);
*id2++ = DW;
}
id1 -= (9 * width)>>2;
id2 -= (9 * width)>>2;
py1 += width;
py2 += width;
}
}