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/*
* Pure Data Packet module.
* Copyright (c) 2003 by Johannes Taelman <johannes.taelman@rug.ac.be>
* API updates by Tom Schouten <pdp@zzz.kotnet.org>
*
* 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.
*
*/
#include "pdp.h"
#include "pdp_base.h"
#include <math.h>
typedef struct pdp_cog_struct
{
t_object x_obj;
t_float x_f;
t_outlet *x_outlet0;
t_outlet *x_outlet1;
t_outlet *x_outlet2;
t_outlet *x_outlet3;
t_outlet *x_outlet4;
int x_packet0;
int x_threshold;
int x_do_thresholding;
} t_pdp_cog;
static void _pdp_cog_perform(t_pdp_cog *x, int width, int height, short int *data0)
{
short int *pp;
int nbpixels;
int y;
int h,v;
int rowsums[width];
int columnsums[height];
float vsum,vvar,vcog,vstd;
float hsum,hvar,hcog,hstd;
pp=data0;
nbpixels=width*height;
for (h=0;h<width;h++)
columnsums[h]=0;
/* create column & row sums from thresholded data */
if (x->x_do_thresholding){
for (v=0;v<height;v++){
int rs=0;
for (h=0;h<width;h++){
int d=*pp++;
d=(d>x->x_threshold) ? d : ((d<-x->x_threshold)?(-d):0);
columnsums[h]+= d;
rs+=d;
}
rowsums[v]=rs;
}
}
/* don't perform thresholding */
else{
for (v=0;v<height;v++){
int rs=0;
for (h=0;h<width;h++){
int d=*pp++;
columnsums[h]+= d;
rs+=d;
}
rowsums[v]=rs;
}
}
/* compute vertical mean and standard dev */
vsum=1;
vvar=height*height/4;
vcog=height/2;
for (v=0;v<height;v++){
float d=rowsums[v];
vsum+=d;
vcog+=d*v;
}
vcog/=vsum;
for (v=0;v<height;v++){
float d=rowsums[v];
float f=v-vcog;
vvar+=d*f*f;
}
vstd=sqrt(vvar/vsum)/height;
/* compute horizontal meaan and standard dev */
hsum=1;
hvar=width*width/4;
hcog=width/2;
for (h=0;h<width;h++){
float d=columnsums[h];
hsum+=d;
hcog+=d*h;
}
hcog/=hsum;
for (h=0;h<width;h++){
float d=columnsums[h];
float f=h-hcog;
hvar+=d*f*f;
}
hstd=sqrt(hvar/hsum)/width;
/* pass it on */
outlet_float(x->x_outlet4,vstd);
outlet_float(x->x_outlet3,hstd);
outlet_float(x->x_outlet2,vcog/height);
outlet_float(x->x_outlet1,hcog/width);
outlet_float(x->x_outlet0,(1.0f / (float)(0x7fff)) * hsum/(height*width));
}
// packet is an image/*/* packet or invalid */
static void pdp_cog_perform(t_pdp_cog *x)
{
t_pdp *header0 = pdp_packet_header(x->x_packet0);
void *data0 = pdp_packet_data(x->x_packet0);
if (!header0 || !data0) return;
_pdp_cog_perform(x,
header0->info.image.width,
header0->info.image.height,
data0);
}
static void pdp_cog_input_0(t_pdp_cog *x, t_symbol *s, t_floatarg f)
{
int packet = (int)f;
/* register */
if (s == gensym("register_ro")){
/* replace if not compatible or we are not interpolating */
pdp_packet_mark_unused(x->x_packet0);
x->x_packet0 = pdp_packet_convert_ro(packet, pdp_gensym("image/*/*"));
}
if (s == gensym("process")){
pdp_cog_perform(x);
}
}
static void pdp_cog_threshold(t_pdp_cog *x, t_floatarg f)
{
x->x_threshold=(int) (f * ((float) 0x7fff));
}
static void pdp_cog_free(t_pdp_cog *x)
{
pdp_packet_mark_unused(x->x_packet0);
}
t_class *pdp_cog_class;
void *pdp_cog_new(void)
{
t_pdp_cog *x = (t_pdp_cog *)pd_new(pdp_cog_class);
x->x_outlet0 = outlet_new(&x->x_obj, &s_float);
x->x_outlet1 = outlet_new(&x->x_obj, &s_float);
x->x_outlet2 = outlet_new(&x->x_obj, &s_float);
x->x_outlet3 = outlet_new(&x->x_obj, &s_float);
x->x_outlet4 = outlet_new(&x->x_obj, &s_float);
x->x_packet0 = -1;
x->x_do_thresholding = 0;
return (void *)x;
}
void *pdp_cog_abs_thresh_new(t_floatarg f)
{
t_pdp_cog *x = (t_pdp_cog *)pdp_cog_new();
inlet_new((void *)x, &x->x_obj.ob_pd, gensym("float"),gensym("threshold"));
pdp_cog_threshold(x, f);
x->x_do_thresholding = 1;
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_cog_setup(void)
{
pdp_cog_class = class_new(gensym("pdp_cog"), (t_newmethod)pdp_cog_new,
(t_method)pdp_cog_free, sizeof(t_pdp_cog), 0,A_NULL);
class_addcreator((t_newmethod)pdp_cog_abs_thresh_new, gensym("pdp_cog_abs_thresh"), A_DEFFLOAT, A_NULL);
class_addmethod(pdp_cog_class, (t_method)pdp_cog_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_cog_class, (t_method)pdp_cog_threshold, gensym("threshold"),A_DEFFLOAT, A_NULL);
}
#ifdef __cplusplus
}
#endif
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