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/*********************************************************************************
* recordMyDesktop *
**********************************************************************************
* *
* Copyright (C) 2006 John Varouhakis *
* *
* *
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
* *
* *
* *
* For further information contact me at biocrasher@gmail.com *
**********************************************************************************/
#include <recordmydesktop.h>
void XImageToYUV(XImage *imgz,yuv_buffer *yuv){
unsigned char *dtap=(unsigned char *)imgz->data;
int i,k,j=0;
for(k=0;k<(imgz->width*imgz->height);k++){
yuv->y[k]=Yr[dtap[(k*4)+2]] + Yg[dtap[(k*4)+1]] + Yb[dtap[(k*4)]];
}
for(i=0;i<(imgz->height);i+=2){
for(k=0;k<(imgz->width);k+=2){
yuv->u[j]=Ur[dtap[i*imgz->bytes_per_line+k*4+2]] + Ug[dtap[i*imgz->bytes_per_line+k*4+1]] + Ub[dtap[i*imgz->bytes_per_line+k*4]];
yuv->v[j]=Vr[dtap[i*imgz->bytes_per_line+k*4+2]] + Vg[dtap[i*imgz->bytes_per_line+k*4+1]] + Vb[dtap[i*imgz->bytes_per_line+k*4]] ;
j++;
}
}
}
void MakeMatrices(){
int i;
for(i=0;i<256;i++)
Yr[i]=0.299*i;
for(i=0;i<256;i++)
Yg[i]=0.587*i;
for(i=0;i<256;i++)
Yb[i]=0.114*i;
for(i=0;i<256;i++)
Ur[i]=43.1-0.169*i;
for(i=0;i<256;i++)
Ug[i]=84.41-0.331*i;
for(i=0;i<256;i++)
Ub[i]=0.5*i;
for(i=0;i<256;i++)
Vr[i]=0.5*i;
for(i=0;i<256;i++)
Vg[i]=107-0.419*i;
for(i=0;i<256;i++)
Vb[i]=21-0.081*i;
}
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