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/*
* wavestretcher~ - above and below a threshold, the waveform is stretched or squashed
* Copyright (c) 2005-2023 Edward Kelly
* Forinformaion on usage and distribution, and for a DICLAIMER OF ALL
* WARRANTIES, see the file "LICENSE.txt," in this distribution. */
#include "m_pd.h"
#include "saturate.h"
static t_class *wavestretcher_tilde_class;
typedef struct _wavestretcher_tilde {
t_object x_obj;
t_float token, bipolar;
// t_float token, debug, safety;
t_outlet *stretched;
} t_wavestretcher_tilde;
t_int *wavestretcher_tilde_perform(t_int *w) {
//t_wavestretcher_tilde *x = (t_wavestretcher_tilde *)(w[1]);
t_sample *in = (t_sample *)(w[2]);
t_sample *thresh = (t_sample *)(w[3]);
t_sample *stretch = (t_sample *)(w[4]);
t_sample *out = (t_sample *)(w[5]);
int n = (int)(w[6]);
t_sample insample = 0;
t_sample thsample = 0;
t_sample stsample = 0;
t_sample stnegative = 0;
t_sample stosample = 0;
t_sample stusample = 0;
t_sample reciprocal = 0;
t_sample remainder = 0;
t_sample remciprocal = 0;
while (n--)
{
insample = *in++;
thsample = saturate(*thresh++);
thsample = thsample * 0.5 + 0.5;
stsample = *stretch++;
stnegative = 0 - stsample;
reciprocal = 1 / thsample;
remainder = 1 - thsample;
remciprocal = 1 / remainder;
if(stsample > 0) {
stusample = stsample * reciprocal + (1 - stsample);
stosample = 1 - stsample;
*out++ = insample < thsample && insample > -thsample ? insample * stusample : insample >= thsample ? insample * stosample + stsample : insample * stosample - stsample;
} else if (stsample < 0) {
stusample = 1 - stnegative;
stosample = stnegative * remciprocal + (1 - stnegative);
*out++ = insample < thsample && insample > -thsample ? insample * stusample : insample >= thsample ? (insample - thsample) * stosample + thsample * (1 - stnegative) : (insample + thsample) * stosample - thsample * (1 - stnegative);
} else if (stsample == 0) {
*out++ = insample;
}
}
return (w+7);
}
void wavestretcher_tilde_bipolar(t_wavestretcher_tilde *x, t_floatarg f) {
x->bipolar = f;
}
void wavestretcher_tilde_dsp(t_wavestretcher_tilde *x, t_signal **sp) {
dsp_add(wavestretcher_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 *wavestretcher_tilde_new(t_floatarg f) {
t_wavestretcher_tilde *x = (t_wavestretcher_tilde *)pd_new(wavestretcher_tilde_class);
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);
outlet_new(&x->x_obj, &s_signal);
return (void *)x;
}
void wavestretcher_tilde_setup(void) {
wavestretcher_tilde_class = class_new(gensym("wavestretcher~"),
(t_newmethod)wavestretcher_tilde_new,
0, sizeof(t_wavestretcher_tilde),
CLASS_DEFAULT, A_DEFFLOAT, 0);
post("~~~~~~~~~~~~~~~>wavestretcher~");
post("~~~>by Ed Kelly, 2012");
class_addmethod(wavestretcher_tilde_class,
(t_method)wavestretcher_tilde_dsp, gensym("dsp"), 0);
CLASS_MAINSIGNALIN(wavestretcher_tilde_class, t_wavestretcher_tilde, token);
class_addmethod(wavestretcher_tilde_class, (t_method)wavestretcher_tilde_bipolar, gensym("bipolar"), A_DEFFLOAT, 0);
// class_addmethod(wavestretcher_tilde_class, (t_method)wavestretcher_tilde_mode, gensym("mode"), A_DEFFLOAT, 0);
}
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