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/*
* framespect~ : Weighted alpha comparison, block-by-block.
* 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 *framespect_tilde_class;
typedef struct _framespect_tilde
{
t_object x_obj;
t_float f;
t_float f_max, f_win, f_accum;
t_outlet *f_score;
} t_framespect_tilde;
t_int *framespect_tilde_perform(t_int *w)
{
t_framespect_tilde *x = (t_framespect_tilde *)(w[1]);
t_sample *real1 = (t_sample *)(w[2]);
t_sample *imag1 = (t_sample *)(w[3]);
t_sample *real2 = (t_sample *)(w[4]);
t_sample *imag2 = (t_sample *)(w[5]);
int n = (int)(w[6]);
float r1, i1, r2, i2;
float vector1;
float vector2;
x->f_accum = 0;
float block_accum = 0;
x->f_max = 0;
float score = 0;
float avg = 0;
int block = n;
x->f_win = x->f_win > 0 ? x->f_win : 0.01;
while (n--)
{
r1 = (*real1++);
i1 = (*imag1++);
r2 = (*real2++);
i2 = (*imag2++);
vector1 = sqrt((r1 * r1) + (i1 * i1));
vector2 = sqrt((r2 * r2) + (i2 * i2));
vector1 = vector1 > 0 ? vector1 : 0 - vector1;
vector2 = vector2 > 0 ? vector2 : 0 - vector2;
block_accum += vector2;
x->f_max = vector2 > x->f_max ? vector2 : x->f_max;
float diff = vector1 > vector2 ? vector1 - vector2 : vector2 - vector1;
x->f_accum += (1/((diff/x->f_win)+1)) * vector2;
}
score = x->f_accum / x->f_max;
block_accum /= x->f_max;
avg = score / block_accum;
outlet_float(x->f_score, avg);
return(w+7);
}
void framespect_tilde_dsp(t_framespect_tilde *x, t_signal **sp)
{
dsp_add(framespect_tilde_perform, 6, x,
sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec, sp[0]->s_n);
}
void *framespect_tilde_new(t_floatarg f)
{
t_framespect_tilde *x = (t_framespect_tilde *)pd_new(framespect_tilde_class);
x->f_win = f;
inlet_new (&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
inlet_new (&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
inlet_new (&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
floatinlet_new (&x->x_obj, &x->f_win);
x->f_score = outlet_new(&x->x_obj, gensym("float"));
return (void *)x;
}
void framespect_tilde_setup(void)
{
framespect_tilde_class = class_new(gensym("framespect~"),
(t_newmethod)framespect_tilde_new,
0, sizeof(t_framespect_tilde),
CLASS_DEFAULT, A_DEFFLOAT, 0);
post("|'''''''''''framespect~'''''''''''''|");
post("|'''''weighted alpha comparison'''''|");
post("|'''edward'''''''kelly'''''''2005'''|");
class_addmethod(framespect_tilde_class, (t_method)framespect_tilde_dsp,
gensym("dsp"), 0);
CLASS_MAINSIGNALIN(framespect_tilde_class, t_framespect_tilde, f);
}
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