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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.
iem_spec2 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2006 */
#include "m_pd.h"
#include "iemlib.h"
#include <math.h>
#define SPEC2LOGTEN 2.302585092994f
/* ------------------------ spec2_rmstodb_tilde~ ------------------------- */
static t_class *spec2_rmstodb_tilde_class;
typedef struct _spec2_rmstodb_tilde
{
t_object x_obj;
t_float x_msi;
} t_spec2_rmstodb_tilde;
static t_int *spec2_rmstodb_tilde_perform(t_int *w)
{
t_float *in = (t_float *)(w[1]);
t_float *out = (t_float *)(w[2]);
int n = w[3]+1;
for(; n--; in++, out++)
{
t_float f = *in;
if(f <= 0.0f)
*out = 0.0f;
else
{
t_float g = 100.0f + 20.0f/SPEC2LOGTEN * log(f);
*out = (g < 0.0f ? 0.0f : g);
}
}
return(w+4);
}
static void spec2_rmstodb_tilde_dsp(t_spec2_rmstodb_tilde *x, t_signal **sp)
{
int n = (sp[0]->s_n)/2;
dsp_add(spec2_rmstodb_tilde_perform, 3, sp[0]->s_vec, sp[0]->s_vec, n);
}
static void *spec2_rmstodb_tilde_new(void)
{
t_spec2_rmstodb_tilde *x = (t_spec2_rmstodb_tilde *)pd_new(spec2_rmstodb_tilde_class);
outlet_new(&x->x_obj, &s_signal);
x->x_msi = 0.0f;
return (x);
}
void spec2_rmstodb_tilde_setup(void)
{
spec2_rmstodb_tilde_class = class_new(gensym("spec2_rmstodb~"), (t_newmethod)spec2_rmstodb_tilde_new,
0, sizeof(t_spec2_rmstodb_tilde), 0, 0);
CLASS_MAINSIGNALIN(spec2_rmstodb_tilde_class, t_spec2_rmstodb_tilde, x_msi);
class_addmethod(spec2_rmstodb_tilde_class, (t_method)spec2_rmstodb_tilde_dsp, gensym("dsp"), 0);
class_sethelpsymbol(spec2_rmstodb_tilde_class, gensym("iemhelp2/spec2_rmstodb~-help"));
}
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