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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. */
#include "m_pd.h"
typedef struct _mean
{
t_object x_ob;
double x_accum;
unsigned x_count;
t_float x_mean;
t_outlet *x_countout;
} t_mean;
static t_class *mean_class;
static void mean_clear(t_mean *x)
{
x->x_accum = 0;
x->x_count = 0;
x->x_mean = 0;
}
static void mean_bang(t_mean *x)
{
/* CHECKED: count is always sent (first) */
outlet_float(x->x_countout, x->x_count);
outlet_float(((t_object *)x)->ob_outlet, x->x_mean);
}
static void mean_float(t_mean *x, t_float f)
{
x->x_accum += f;
if (++x->x_count)
x->x_mean = (t_float)(x->x_accum / (double)x->x_count);
else mean_clear(x);
mean_bang(x);
}
static void mean_list(t_mean *x, t_symbol *s, int ac, t_atom *av)
{
mean_clear(x);
while (ac--)
{
if (av->a_type == A_FLOAT)
{
x->x_accum += av->a_w.w_float;
x->x_count++;
}
av++;
}
if (x->x_count)
x->x_mean = (t_float)(x->x_accum / (double)x->x_count);
else mean_clear(x);
mean_bang(x);
/* CHECKED: no clear after list -- subsequent floats are added */
}
static void *mean_new(void)
{
t_mean *x = (t_mean *)pd_new(mean_class);
mean_clear(x);
outlet_new((t_object *)x, &s_float);
x->x_countout = outlet_new((t_object *)x, &s_float);
return (x);
}
void mean_setup(void)
{
mean_class = class_new(gensym("mean"),
(t_newmethod)mean_new, 0,
sizeof(t_mean), 0, 0);
class_addbang(mean_class, mean_bang);
class_addfloat(mean_class, mean_float);
class_addlist(mean_class, mean_list);
class_addmethod(mean_class, (t_method)mean_clear,
gensym("clear"), 0);
}
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