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/*
* tabminmax: get minimum and maximum of a table
*
* (c) 1999-2011 IOhannes m zmölnig, forum::für::umläute, institute of electronic music and acoustics (iem)
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "zexy.h"
/* =================== tabminmax ====================== */
static t_class *tabminmax_class;
typedef struct _tabminmax
{
t_object x_obj;
t_outlet*min_out, *max_out;
t_symbol *x_arrayname;
t_int startindex, stopindex;
} t_tabminmax;
static void tabminmax_bang(t_tabminmax *x)
{
t_garray *A;
int npoints;
zarray_t *vec;
if (!(A = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
error("%s: no such array", x->x_arrayname->s_name);
else if (!zarray_getarray(A, &npoints, &vec))
error("%s: bad template for tabminmax", x->x_arrayname->s_name);
else
{
int n;
t_atom atombuf[2];
t_float min, max;
int mindex, maxdex;
int start=x->startindex;
int stop =x->stopindex;
if(start<0||start>stop)start=0;
if(stop<start||stop>npoints)stop=npoints;
npoints=stop-start;
min=zarray_getfloat(vec, start);
max=min;
mindex=start;
maxdex=start;
for (n = 1; n < npoints; n++){
t_float val=zarray_getfloat(vec, start+n);
if(val<min){
mindex=start+n;
min=val;
}
if(val>max){
maxdex=start+n;
max=val;
}
}
SETFLOAT(atombuf, max);
SETFLOAT(atombuf+1, maxdex);
outlet_list(x->max_out, gensym("list"), 2, atombuf);
SETFLOAT(atombuf, min);
SETFLOAT(atombuf+1, mindex);
outlet_list(x->min_out, gensym("list"), 2, atombuf);
}
}
static void tabminmax_list(t_tabminmax *x, t_symbol*s,int argc, t_atom*argv)
{
int a,b;
ZEXY_USEVAR(s);
switch(argc){
case 2:
a=atom_getint(argv);
b=atom_getint(argv+1);
x->startindex=(a<b)?a:b;
x->stopindex =(a>b)?a:b;
tabminmax_bang(x);
break;
default:
error("tabminmax: list must be 2 floats (is %d atoms)", argc);
}
}
static void tabminmax_set(t_tabminmax *x, t_symbol *s)
{
x->x_arrayname = s;
}
static void *tabminmax_new(t_symbol *s)
{
t_tabminmax *x = (t_tabminmax *)pd_new(tabminmax_class);
x->x_arrayname = s;
x->startindex=0;
x->stopindex=-1;
x->min_out=outlet_new(&x->x_obj, gensym("list"));
x->max_out=outlet_new(&x->x_obj, gensym("list"));
return (x);
}
static void tabminmax_helper(void)
{
post("\n%c tabminmax - object : dumps a table as a package of floats", HEARTSYMBOL);
post("'set <table>'\t: read out another table\n"
"'bang'\t\t: get min and max of the table\n"
"outlet\t\t: table-data as package of floats");
post("creation\t: \"tabminmax <table>\"");
}
void tabminmax_setup(void)
{
tabminmax_class = class_new(gensym("tabminmax"), (t_newmethod)tabminmax_new,
0, sizeof(t_tabminmax), 0, A_DEFSYM, 0);
class_addbang(tabminmax_class, (t_method)tabminmax_bang);
class_addlist(tabminmax_class, (t_method)tabminmax_list);
class_addmethod(tabminmax_class, (t_method)tabminmax_set, gensym("set"),
A_SYMBOL, 0);
class_addmethod(tabminmax_class, (t_method)tabminmax_helper, gensym("help"), 0);
zexy_register("tabminmax");
}
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