sum.cpp

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 namespace firevision {
00031 #if 0 /* just to make Emacs auto-indent happy */
00032 }
00033 #endif
00034 
00035 /** @class FilterSum <filters/sum.h>
00036  * Sum filter.
00037  * Adds two images.
00038  * @author Tim Niemueller
00039  */
00040 
00041 /** Constructor. */
00042 FilterSum::FilterSum()
00043   : Filter("FilterSum", 2)
00044 {
00045 }
00046 
00047 
00048 void
00049 FilterSum::apply()
00050 {
00051   if ( src[0] == NULL ) return;
00052   if ( src[1] == NULL ) return;
00053   if ( src_roi[0] == NULL ) return;
00054   if ( src_roi[1] == NULL ) return;
00055 
00056   register unsigned int h = 0;
00057   register unsigned int w = 0;
00058 
00059 
00060   // y-plane
00061   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);
00062   // u-plane
00063   register unsigned char *bup   = YUV422_PLANAR_U_PLANE(src[0], src_roi[0]->image_width, src_roi[0]->image_height)
00064     + ((src_roi[0]->start.y * src_roi[0]->line_step) / 2 + (src_roi[0]->start.x * src_roi[0]->pixel_step) / 2) ;
00065   // v-plane
00066   register unsigned char *bvp   = YUV422_PLANAR_V_PLANE(src[0], src_roi[0]->image_width, src_roi[0]->image_height)
00067     + ((src_roi[0]->start.y * src_roi[0]->line_step) / 2 + (src_roi[0]->start.x * src_roi[0]->pixel_step) / 2);
00068 
00069 
00070   // y-plane
00071   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);
00072   // u-plane
00073   register unsigned char *fup   = YUV422_PLANAR_U_PLANE(src[1], src_roi[1]->image_width, src_roi[1]->image_height)
00074     + ((src_roi[1]->start.y * src_roi[1]->line_step) / 2 + (src_roi[1]->start.x * src_roi[1]->pixel_step) / 2) ;
00075   // v-plane
00076   register unsigned char *fvp   = YUV422_PLANAR_V_PLANE(src[1], src_roi[1]->image_width, src_roi[1]->image_height)
00077     + ((src_roi[1]->start.y * src_roi[1]->line_step) / 2 + (src_roi[1]->start.x * src_roi[1]->pixel_step) / 2);
00078 
00079 
00080   // destination y-plane
00081   register unsigned char *dyp  = dst + (dst_roi->start.y * dst_roi->line_step) + (dst_roi->start.x * dst_roi->pixel_step);
00082   // destination u-plane
00083   register unsigned char *dup   = YUV422_PLANAR_U_PLANE(dst, dst_roi->image_width, dst_roi->image_height)
00084     + ((dst_roi->start.y * dst_roi->line_step) / 2 + (dst_roi->start.x * dst_roi->pixel_step) / 2) ;
00085   // destination v-plane
00086   register unsigned char *dvp   = YUV422_PLANAR_V_PLANE(dst, dst_roi->image_width, dst_roi->image_height)
00087     + ((dst_roi->start.y * dst_roi->line_step) / 2 + (dst_roi->start.x * dst_roi->pixel_step) / 2);
00088   
00089   // line starts
00090   unsigned char *lbyp = byp;   // y-plane
00091   unsigned char *lbup = fup;   // u-plane
00092   unsigned char *lbvp = fvp;   // v-plane
00093   unsigned char *lfyp = fyp;   // y-plane
00094   unsigned char *lfup = fup;   // u-plane
00095   unsigned char *lfvp = fvp;   // v-plane
00096   unsigned char *ldyp = dyp;  // destination y-plane
00097   unsigned char *ldup = dup;  // destination u-plane
00098   unsigned char *ldvp = dvp;  // destination v-plane
00099 
00100   for (h = 0; (h < src_roi[1]->height) && (h < dst_roi->height); ++h) {
00101     for (w = 0; (w < src_roi[1]->width) && (w < dst_roi->width); w += 2) {
00102       *dyp++ = ((*byp + *fyp) > 255) ? 255 : (*byp + *fyp);
00103       ++byp; ++fyp;
00104       *dyp++ = ((*byp + *fyp) > 255) ? 255 : (*byp + *fyp);
00105       ++byp; ++fyp;
00106 
00107       *dup++ = (*fup++ + *bup++) / 2;
00108       *dvp++ = (*fvp++ + *bvp++) / 2;
00109     }
00110 
00111     lbyp   += src_roi[0]->line_step;
00112     lbup   += src_roi[0]->line_step / 2;
00113     lbvp   += src_roi[0]->line_step / 2;
00114     lfyp   += src_roi[1]->line_step;
00115     lfup   += src_roi[1]->line_step / 2;
00116     lfvp   += src_roi[1]->line_step / 2;
00117     ldyp  += dst_roi->line_step;
00118     ldup  += dst_roi->line_step / 2;
00119     ldvp  += dst_roi->line_step / 2;
00120     byp    = lbyp;
00121     bup    = lbup;
00122     bvp    = lbvp;
00123     fyp    = lfyp;
00124     fup    = lfup;
00125     fvp    = lfvp;
00126     dyp    = ldyp;
00127     dup    = ldup;
00128     dvp    = ldvp;
00129   }
00130 
00131 }
00132 
00133 } // end namespace firevision