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/* sIgpAck
* for
* pure-data
* www.weiss-archiv.de */
#include "m_pd.h"
#ifdef _MSC_VER
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
/* ------------------------ foldover~ ----------------------------- */
/* foldover distortion */
/* code from swh_plugins by steve harris www.plugin.org.uk */
static t_class *foldover_tilde_class;
typedef struct _foldover_tilde
{
t_object x_obj;
t_sample x_drive_p;
t_sample x_push;
float x_f;
} t_foldover_tilde;
static void *foldover_tilde_new(t_floatarg drive_p, t_floatarg push)
{
t_foldover_tilde *x = (t_foldover_tilde *)pd_new(foldover_tilde_class);
x->x_drive_p = drive_p;
x->x_push = push;
outlet_new(&x->x_obj, gensym("signal"));
floatinlet_new(&x->x_obj, &x->x_drive_p);
floatinlet_new(&x->x_obj, &x->x_push);
x->x_f = 0;
if(drive_p) x->x_drive_p = drive_p;
else x->x_drive_p = 0;
if(push) x->x_push = push;
else x->x_push = 0;
return (x);
}
static t_int *foldover_tilde_perform(t_int *w)
{
t_foldover_tilde *x = (t_foldover_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, y;
float drive = x->x_drive_p + 1.0f;
while (n--)
{
f = *in++;
y = f * drive + x->x_push;
value = 1.5f * y - 0.5f * y * y *y;
*out++ = value;
}
return (w+5);
}
static void foldover_tilde_dsp(t_foldover_tilde *x, t_signal **sp)
{
dsp_add(foldover_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
void foldover_tilde_setup(void)
{
foldover_tilde_class = class_new(gensym("foldover~"), (t_newmethod)foldover_tilde_new, 0,
sizeof(t_foldover_tilde), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(foldover_tilde_class, t_foldover_tilde, x_f);
class_addmethod(foldover_tilde_class, (t_method)foldover_tilde_dsp, gensym("dsp"), 0);
}
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