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/* sIgpAck
* for
* pure-data
* www.weiss-archiv.de */
#include "m_pd.h"
#include <math.h>
#ifdef _MSC_VER
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
/* ------------------------ diode~ ----------------------------- */
/* Mangles the signal as if it had been passed through a diode rectifier network.*/
/* code from swh_plugins by steve harris www.plugin.org.uk */
static t_class *diode_tilde_class;
typedef struct _diode_tilde
{
t_object x_obj;
t_sample x_mode;//0=none,1=halfWave,2=fullWave
float x_f;
} t_diode_tilde;
static void *diode_tilde_new(t_floatarg mode)
{
t_diode_tilde *x = (t_diode_tilde *)pd_new(diode_tilde_class);
x->x_mode = mode;
outlet_new(&x->x_obj, gensym("signal"));
floatinlet_new(&x->x_obj, &x->x_mode);
x->x_f = 0;
if(mode) x->x_mode = mode;
else x->x_mode = 0;
return (x);
}
static t_int *diode_tilde_perform(t_int *w)
{
t_diode_tilde *x = (t_diode_tilde *)(w[1]);
t_float *in = (t_float *)(w[2]);
t_float *out = (t_float *)(w[3]);
int n = (int)(w[4]);
float f, value;
while (n--)
{
f = *in++;
if(x->x_mode >= 0.0f && x->x_mode < 1.0f) {
value = ((1.0f - x->x_mode) * f + (x->x_mode * (f > 0.0f ? f : 0.0f)));
}
else if (x->x_mode >= 1.0f && x->x_mode < 2.0f) {
float fac = x->x_mode - 1.0f;
value = ((1.0f - fac) * (f > 0 ? f : 0.0)) + (fac * fabs(f));
}
else if (x->x_mode >= 2) {
float fac = x->x_mode < 3 ? x->x_mode - 2 : 1.0;
value = (1.0 - fac) * fabs(f);
}
else {
value = f;
}
*out++ = value;
}
return (w+5);
}
static void diode_tilde_dsp(t_diode_tilde *x, t_signal **sp)
{
dsp_add(diode_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
void diode_tilde_setup(void)
{
diode_tilde_class = class_new(gensym("diode~"), (t_newmethod)diode_tilde_new, 0,
sizeof(t_diode_tilde), 0, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(diode_tilde_class, t_diode_tilde, x_f);
class_addmethod(diode_tilde_class, (t_method)diode_tilde_dsp, gensym("dsp"), 0);
}
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