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/* Copyright (c) 2002-2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* This is an entirely rewritten version of Joseph A. Sarlo's code.
The most important changes are listed in "pd-lib-notes.txt" file. */
#include "m_pd.h"
#include "common/loud.h"
#define HISTO_DEFSIZE 128
typedef struct _Histo
{
t_object x_ob;
int x_size;
unsigned *x_hist; /* LATER consider using 64 bits */
int x_lastinput;
t_outlet *x_countout;
} t_Histo;
static t_class *Histo_class;
static void Histo_clear(t_Histo *x)
{
int i = x->x_size;
while (i--) x->x_hist[i] = 0;
/* CHECKED: last input is kept */
}
static void Histo_doit(t_Histo *x, int val, int doincr)
{
if (val >= 0 && val < x->x_size)
{
if (doincr)
{
/* CHECKED: only in-range numbers are stored */
x->x_lastinput = val;
x->x_hist[val]++;
}
outlet_float(x->x_countout, x->x_hist[val]);
/* CHECKED: out-of-range numbers are never passed thru */
outlet_float(((t_object *)x)->ob_outlet, val);
}
}
static void Histo_bang(t_Histo *x)
{
Histo_doit(x, x->x_lastinput, 0);
}
static void Histo_float(t_Histo *x, t_floatarg f)
{
int i;
if (loud_checkint((t_pd *)x, f, &i, &s_float)) /* CHECKED */
Histo_doit(x, i, 1);
}
static void Histo_ft1(t_Histo *x, t_floatarg f)
{
/* CHECKED: floats are accepted in second inlet (truncated) */
Histo_doit(x, (int)f, 0);
}
static void Histo_free(t_Histo *x)
{
if (x->x_hist)
freebytes(x->x_hist, x->x_size * sizeof(*x->x_hist));
}
static void *Histo_new(t_floatarg f)
{
t_Histo *x;
int size = (int)f;
unsigned *hist;
if (size < 1) /* CHECKED: 1 is allowed */
size = HISTO_DEFSIZE;
if (!(hist = (unsigned *)getbytes(size * sizeof(*hist))))
return (0);
x = (t_Histo *)pd_new(Histo_class);
x->x_size = size;
x->x_hist = hist;
x->x_lastinput = 0;
inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
outlet_new((t_object *)x, &s_float);
x->x_countout = outlet_new((t_object *)x, &s_float);
Histo_clear(x);
return (x);
}
void Histo_setup(void)
{
Histo_class = class_new(gensym("Histo"),
(t_newmethod)Histo_new,
(t_method)Histo_free,
sizeof(t_Histo), 0, A_DEFFLOAT, 0);
class_addbang(Histo_class, Histo_bang);
class_addfloat(Histo_class, Histo_float);
class_addmethod(Histo_class, (t_method)Histo_ft1,
gensym("ft1"), A_FLOAT, 0);
class_addmethod(Histo_class, (t_method)Histo_clear,
gensym("clear"), 0);
}
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