00001
00002 /***************************************************************************
00003  *  sum.cpp - implementation of sum intensity filter
00004  *
00005  *  Created: Sun Jun 25 19:01:01 2006 (on train to Ac, father in hospital)
00006  *  Copyright  2005-2007  Tim Niemueller [www.niemueller.de]
00007  *
00008  ****************************************************************************/
00009
00010 /*  This program is free software; you can redistribute it and/or modify
00011  *  it under the terms of the GNU General Public License as published by
00012  *  the Free Software Foundation; either version 2 of the License, or
00013  *  (at your option) any later version. A runtime exception applies to
00014  *  this software (see LICENSE.GPL_WRE file mentioned below for details).
00015  *
00016  *  This program is distributed in the hope that it will be useful,
00017  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  *  GNU Library General Public License for more details.
00020  *
00021  *  Read the full text in the LICENSE.GPL_WRE file in the doc directory.
00022  */
00023
00024 #include <filters/sum.h>
00025
00026 #include <fvutils/color/yuv.h>
00027
00028 #include <cstddef>
00029 
00030 /** @class FilterSum <filters/sum.h>
00031  * Sum filter.
00032  * Adds two images.
00033  * @author Tim Niemueller
00034  */
00035 
00036 /** Constructor. */
00037 FilterSum::FilterSum()
00038   : Filter("FilterSum", 2)
00039 {
00040 }
00041
00042
00043 void
00044 FilterSum::apply()
00045 {
00046   if ( src[0] == NULL ) return;
00047   if ( src[1] == NULL ) return;
00048   if ( src_roi[0] == NULL ) return;
00049   if ( src_roi[1] == NULL ) return;
00050
00051   register unsigned int h = 0;
00052   register unsigned int w = 0;
00053
00054
00055   // y-plane
00056   register unsigned char *byp   = src[0] + (src_roi[0]->start.y * src_roi[0]->line_step) + (src_roi[0]->start.x * src_roi[0]->pixel_step);
00057   // u-plane
00058   register unsigned char *bup   = YUV422_PLANAR_U_PLANE(src[0], src_roi[0]->image_width, src_roi[0]->image_height)
00059     + ((src_roi[0]->start.y * src_roi[0]->line_step) / 2 + (src_roi[0]->start.x * src_roi[0]->pixel_step) / 2) ;
00060   // v-plane
00061   register unsigned char *bvp   = YUV422_PLANAR_V_PLANE(src[0], src_roi[0]->image_width, src_roi[0]->image_height)
00062     + ((src_roi[0]->start.y * src_roi[0]->line_step) / 2 + (src_roi[0]->start.x * src_roi[0]->pixel_step) / 2);
00063
00064
00065   // y-plane
00066   register unsigned char *fyp   = src[1] + (src_roi[1]->start.y * src_roi[1]->line_step) + (src_roi[1]->start.x * src_roi[1]->pixel_step);
00067   // u-plane
00068   register unsigned char *fup   = YUV422_PLANAR_U_PLANE(src[1], src_roi[1]->image_width, src_roi[1]->image_height)
00069     + ((src_roi[1]->start.y * src_roi[1]->line_step) / 2 + (src_roi[1]->start.x * src_roi[1]->pixel_step) / 2) ;
00070   // v-plane
00071   register unsigned char *fvp   = YUV422_PLANAR_V_PLANE(src[1], src_roi[1]->image_width, src_roi[1]->image_height)
00072     + ((src_roi[1]->start.y * src_roi[1]->line_step) / 2 + (src_roi[1]->start.x * src_roi[1]->pixel_step) / 2);
00073
00074
00075   // destination y-plane
00076   register unsigned char *dyp  = dst + (dst_roi->start.y * dst_roi->line_step) + (dst_roi->start.x * dst_roi->pixel_step);
00077   // destination u-plane
00078   register unsigned char *dup   = YUV422_PLANAR_U_PLANE(dst, dst_roi->image_width, dst_roi->image_height)
00079     + ((dst_roi->start.y * dst_roi->line_step) / 2 + (dst_roi->start.x * dst_roi->pixel_step) / 2) ;
00080   // destination v-plane
00081   register unsigned char *dvp   = YUV422_PLANAR_V_PLANE(dst, dst_roi->image_width, dst_roi->image_height)
00082     + ((dst_roi->start.y * dst_roi->line_step) / 2 + (dst_roi->start.x * dst_roi->pixel_step) / 2);
00083
00084   // line starts
00085   unsigned char *lbyp = byp;   // y-plane
00086   unsigned char *lbup = fup;   // u-plane
00087   unsigned char *lbvp = fvp;   // v-plane
00088   unsigned char *lfyp = fyp;   // y-plane
00089   unsigned char *lfup = fup;   // u-plane
00090   unsigned char *lfvp = fvp;   // v-plane
00091   unsigned char *ldyp = dyp;  // destination y-plane
00092   unsigned char *ldup = dup;  // destination u-plane
00093   unsigned char *ldvp = dvp;  // destination v-plane
00094
00095   for (h = 0; (h < src_roi[1]->height) && (h < dst_roi->height); ++h) {
00096     for (w = 0; (w < src_roi[1]->width) && (w < dst_roi->width); w += 2) {
00097       *dyp++ = ((*byp + *fyp) > 255) ? 255 : (*byp + *fyp);
00098       ++byp; ++fyp;
00099       *dyp++ = ((*byp + *fyp) > 255) ? 255 : (*byp + *fyp);
00100       ++byp; ++fyp;
00101
00102       *dup++ = (*fup++ + *bup++) / 2;
00103       *dvp++ = (*fvp++ + *bvp++) / 2;
00104     }
00105
00106     lbyp   += src_roi[0]->line_step;
00107     lbup   += src_roi[0]->line_step / 2;
00108     lbvp   += src_roi[0]->line_step / 2;
00109     lfyp   += src_roi[1]->line_step;
00110     lfup   += src_roi[1]->line_step / 2;
00111     lfvp   += src_roi[1]->line_step / 2;
00112     ldyp  += dst_roi->line_step;
00113     ldup  += dst_roi->line_step / 2;
00114     ldvp  += dst_roi->line_step / 2;
00115     byp    = lbyp;
00116     bup    = lbup;
00117     bvp    = lbvp;
00118     fyp    = lfyp;
00119     fup    = lfup;
00120     fvp    = lfvp;
00121     dyp    = ldyp;
00122     dup    = ldup;
00123     dvp    = ldvp;
00124   }
00125
00126 }