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/*
* simile~ : windowed similarity comparison for signals
* 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"
static t_class *simile_tilde_class;
typedef struct _simile_tilde {
t_object x_obj;
t_sample f_win;
t_float x_dummy;
t_outlet *f_frame;
} t_simile_tilde;
t_int *simile_tilde_perform(t_int *w) {
t_simile_tilde *x = (t_simile_tilde *)(w[1]);
t_sample *in1 = (t_sample *)(w[2]);
t_sample *in2 = (t_sample *)(w[3]);
t_sample *out = (t_sample *)(w[4]);
t_sample *sign = (t_sample *)(w[5]);
int n = (int)(w[6]);
t_sample f_win = x->f_win > 0 ? x->f_win : 0.01;
t_float f_accum = 0;
while (n--) {
float i1=(*in1++);
float i2=(*in2++);
float win = x->f_win > 0 ? x->f_win : 0.001;
float min = i1 > i2 ? i1 - i2 : i2 - i1;
f_accum += *out++ = 1/((min/win)+1);
*sign++ = i1 >= i2 ? 1 : -1;
}
outlet_float(x->f_frame, f_accum);
return (w+7);
}
void simile_tilde_dsp(t_simile_tilde *x, t_signal **sp) {
dsp_add(simile_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 *simile_tilde_new(t_floatarg f) {
t_simile_tilde *x = (t_simile_tilde *)pd_new(simile_tilde_class);
x->f_win = f > 0 ? f : 0.01; /* window defaults to 0.01 if no argument given */
inlet_new (&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
floatinlet_new (&x->x_obj, &x->f_win);
outlet_new(&x->x_obj, &s_signal);
outlet_new(&x->x_obj, &s_signal);
x->f_frame = outlet_new(&x->x_obj, gensym("float"));
return (void *)x;
}
void simile_tilde_setup(void) {
simile_tilde_class = class_new(gensym("simile~"),
(t_newmethod)simile_tilde_new,
0, sizeof(t_simile_tilde),
CLASS_DEFAULT, A_DEFFLOAT, 0);
post("|~~~~~~~~~~~~&simile~&~~~~~~~~~~~~~~|");
post("|~&weighted similarity measurement&~|");
post("|~~&edward&~~~~~&kelly&~~~~~&2005&~~|");
class_sethelpsymbol(simile_tilde_class, gensym("help-simile~"));
class_addmethod(simile_tilde_class,
(t_method)simile_tilde_dsp, gensym("dsp"), 0);
CLASS_MAINSIGNALIN(simile_tilde_class, t_simile_tilde, x_dummy);
}
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