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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
/* ------------------------ foldback~ ----------------------------- */
/* signal mirror */
static t_class *foldback_tilde_class;
typedef struct _foldback_tilde
{
t_object x_obj;
t_sample x_low;
t_sample x_high;
float x_f;
} t_foldback_tilde;
static void *foldback_tilde_new(t_floatarg low, t_floatarg high)
{
t_foldback_tilde *x = (t_foldback_tilde *)pd_new(foldback_tilde_class);
x->x_low = low;
x->x_high = high;
outlet_new(&x->x_obj, gensym("signal"));
floatinlet_new(&x->x_obj, &x->x_low);
floatinlet_new(&x->x_obj, &x->x_high);
x->x_f = 0;
if(low) x->x_low = low;
else x->x_low = -1;
if(high) x->x_high = high;
else x->x_high = 1;
return (x);
}
static t_int *foldback_tilde_perform(t_int *w)
{
t_foldback_tilde *x = (t_foldback_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(f < x->x_low) value = (f - ((f - x->x_low) * 2));
else if(f > x->x_high) value = (f - ((f - x->x_high) * 2));
else value = f;
*out++ = value;
}
return (w+5);
}
static void foldback_tilde_dsp(t_foldback_tilde *x, t_signal **sp)
{
dsp_add(foldback_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
void foldback_tilde_setup(void)
{
foldback_tilde_class = class_new(gensym("foldback~"), (t_newmethod)foldback_tilde_new, 0,
sizeof(t_foldback_tilde), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(foldback_tilde_class, t_foldback_tilde, x_f);
class_addmethod(foldback_tilde_class, (t_method)foldback_tilde_dsp, gensym("dsp"), 0);
}
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