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#include "m_pd.h"
#include <math.h>
static t_class *wfold_tilde_class;
typedef struct _wfold_tilde {
t_object x_obj;
t_float threshold, reciprocal, remainder, remciprocal, mode, token, bipolar;
// t_float token, debug, safety;
t_outlet *folded;
} t_wfold_tilde;
t_int *wfold_tilde_perform(t_int *w) {
t_wfold_tilde *x = (t_wfold_tilde *)(w[1]);
t_sample *in = (t_sample *)(w[2]);
t_sample *out = (t_sample *)(w[3]);
int n = (int)(w[4]);
t_float insample = 0;
x->threshold = x->threshold > 0 ? x->threshold < 1 ? x->threshold : 0.5 : 0.5;
x->reciprocal = 1 / x->threshold;
x->remainder = 1 - x->threshold;
x->remciprocal = 1 / x->remainder;
while (n--)
{
insample = *in++;
if(x->bipolar == 0) {
*out++ = insample < x->threshold ? insample * x->reciprocal : 1 - ((insample - x->threshold) * x->remciprocal);
} else if(x->bipolar != 0) {
*out++ = (insample < x->threshold ? insample * x->reciprocal : 1 - ((insample - x->threshold) * x->remciprocal)) * 2 - 1;
}
}
return (w+5);
}
void wfold_tilde_bipolar(t_wfold_tilde *x, t_floatarg f) {
x->bipolar = f;
}
void wfold_tilde_dsp(t_wfold_tilde *x, t_signal **sp) {
dsp_add(wfold_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
/*
void wfold_tilde_mode(t_wfold_tilde *x, t_floatarg f) {
x->mode = f;
} */
void *wfold_tilde_new(t_floatarg f) {
t_wfold_tilde *x = (t_wfold_tilde *)pd_new(wfold_tilde_class);
x->threshold = f > 0 ? f < 1 ? f : 0.5 : 0.5;
x->reciprocal = 1 / x->threshold;
x->remainder = 1 - x->threshold;
x->remciprocal = 1 / x->remainder;
// inlet_new (&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
floatinlet_new (&x->x_obj, &x->threshold);
outlet_new(&x->x_obj, &s_signal);
return (void *)x;
}
void wfold_tilde_setup(void) {
wfold_tilde_class = class_new(gensym("wfold~"),
(t_newmethod)wfold_tilde_new,
0, sizeof(t_wfold_tilde),
CLASS_DEFAULT, A_DEFFLOAT, 0);
post("~~~~~~~~~~~~~~~>wfold~");
post("~~~>by Ed Kelly, 2012");
class_addmethod(wfold_tilde_class,
(t_method)wfold_tilde_dsp, gensym("dsp"), 0);
CLASS_MAINSIGNALIN(wfold_tilde_class, t_wfold_tilde, token);
class_addmethod(wfold_tilde_class, (t_method)wfold_tilde_bipolar, gensym("bipolar"), A_DEFFLOAT, 0);
// class_addmethod(wfold_tilde_class, (t_method)wfold_tilde_mode, gensym("mode"), A_DEFFLOAT, 0);
}
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