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/*
* hssc~ : Highest Significant Spectral Component, according to amplitude ratio to
* Strongest Significant Spectral Component.
* Copyright (C) 2005 Edward Kelly <morph_2016@yahoo.co.uk>
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "m_pd.h"
#include <math.h>
static t_class *hssc_tilde_class;
typedef struct _hssc_tilde
{
t_object x_obj;
t_float f;
t_float f_maxbin, f_minbin, f_ratio;
t_outlet *f_hssc, *f_sssc;
} t_hssc_tilde;
t_int *hssc_tilde_perform(t_int *w)
{
t_hssc_tilde *x = (t_hssc_tilde *)(w[1]);
t_sample *real = (t_sample *)(w[2]);
t_sample *imag = (t_sample *)(w[3]);
int n = (int)(w[4]);
int incr = 0;
double vectorr, vectori;
double max = 0;
double alpha;
x->f_maxbin = x->f_minbin = 0;
x->f_ratio = x->f_ratio > 0 ? x->f_ratio : 100;
while (n--)
{
vectorr = (*real++);
vectori = (*imag++);
alpha = sqrt((vectorr * vectorr) + (vectori * vectori));
x->f_maxbin = alpha > max ? incr : x->f_maxbin;
max = alpha > max ? alpha : max;
x->f_minbin = alpha > (max / x->f_ratio) ? incr : x->f_minbin;
incr++;
}
outlet_float(x->f_sssc, x->f_maxbin);
outlet_float(x->f_hssc, x->f_minbin);
return(w+5);
}
void hssc_tilde_dsp(t_hssc_tilde *x, t_signal **sp)
{
dsp_add(hssc_tilde_perform, 4, x,
sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
void *hssc_tilde_new(t_floatarg f)
{
t_hssc_tilde *x = (t_hssc_tilde *)pd_new(hssc_tilde_class);
x->f_ratio = f;
inlet_new (&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
floatinlet_new (&x->x_obj, &x->f_ratio);
x->f_hssc = outlet_new(&x->x_obj, gensym("float"));
x->f_sssc = outlet_new(&x->x_obj, gensym("float"));
return (void *)x;
}
void hssc_tilde_setup(void)
{
hssc_tilde_class = class_new(gensym("hssc~"),
(t_newmethod)hssc_tilde_new,
0, sizeof(t_hssc_tilde),
CLASS_DEFAULT, A_DEFFLOAT, 0);
post("|=================hssc~==================|");
post("|=highest significant spectral component=|");
post("|======edward=======kelly=======2005=====|");
class_addmethod(hssc_tilde_class, (t_method)hssc_tilde_dsp,
gensym("dsp"), 0);
CLASS_MAINSIGNALIN(hssc_tilde_class, t_hssc_tilde, f);
}
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