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/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
#include "m_pd.h"
#include "iemlib.h"
#include <math.h>
/* ------------------------ iem_pow4~ ----------------------------- */
static t_class *iem_pow4_tilde_class;
typedef struct _iem_pow4_tilde
{
t_object x_obj;
t_float x_exp;
t_float x_msi;
} t_iem_pow4_tilde;
static void iem_pow4_tilde_ft1(t_iem_pow4_tilde *x, t_floatarg f)
{
x->x_exp = f;
}
static t_int *iem_pow4_tilde_perform(t_int *w)
{
t_float *in = (t_float *)(w[1]);
t_float *out = (t_float *)(w[2]);
t_iem_pow4_tilde *x = (t_iem_pow4_tilde *)(w[3]);
t_float y=x->x_exp;
t_float f, g;
int n = (int)(w[4])/4;
while (n--)
{
f = *in;
if(f < 0.01f)
f = 0.01f;
else if(f > 1000.0f)
f = 1000.0f;
g = log(f);
f = exp(g*y);
*out++ = f;
*out++ = f;
*out++ = f;
*out++ = f;
in += 4;
}
return (w+5);
}
static void iem_pow4_tilde_dsp(t_iem_pow4_tilde *x, t_signal **sp)
{
dsp_add(iem_pow4_tilde_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
}
static void *iem_pow4_tilde_new(t_floatarg f)
{
t_iem_pow4_tilde *x = (t_iem_pow4_tilde *)pd_new(iem_pow4_tilde_class);
x->x_exp = f;
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
outlet_new(&x->x_obj, gensym("signal"));
x->x_msi = 0;
return (x);
}
void iem_pow4_tilde_setup(void)
{
iem_pow4_tilde_class = class_new(gensym("iem_pow4~"), (t_newmethod)iem_pow4_tilde_new, 0,
sizeof(t_iem_pow4_tilde), 0, A_DEFFLOAT, 0);
class_addcreator((t_newmethod)iem_pow4_tilde_new, gensym("icot~"), 0);
CLASS_MAINSIGNALIN(iem_pow4_tilde_class, t_iem_pow4_tilde, x_msi);
class_addmethod(iem_pow4_tilde_class, (t_method)iem_pow4_tilde_dsp, gensym("dsp"), 0);
class_addmethod(iem_pow4_tilde_class, (t_method)iem_pow4_tilde_ft1, gensym("ft1"), A_FLOAT, 0);
class_sethelpsymbol(iem_pow4_tilde_class, gensym("iemhelp/help-iem_pow4~"));
}
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