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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
/* ------------------------ sieve~ ----------------------------- */
/* sift samples */
static t_class *sieve_tilde_class;
typedef struct _sieve_tilde
{
t_object x_obj;
t_sample x_mode;
t_sample x_sample;
t_sample x_last;
float x_f;
} t_sieve_tilde;
static void *sieve_tilde_new(t_floatarg mode, t_floatarg sample)
{
t_sieve_tilde *x = (t_sieve_tilde *)pd_new(sieve_tilde_class);
x->x_mode = mode;
x->x_sample = sample;
outlet_new(&x->x_obj, gensym("signal"));
floatinlet_new(&x->x_obj, &x->x_mode);
floatinlet_new(&x->x_obj, &x->x_sample);
x->x_last = 0;
x->x_f = 0;
x->x_mode = 0;
if(mode) x->x_mode = mode;
if(x->x_mode > 1) x->x_mode = 1;
if(x->x_mode < 0) x->x_mode = 0;
return (x);
}
static float round(float in)
{
float y, round;
int temp;
{
round = in * 10;
temp = round;
y = temp * 0.1;
}
return y;
}
static t_int *sieve_tilde_perform(t_int *w)
{
t_sieve_tilde *x = (t_sieve_tilde *)(w[1]);
t_float *in = (t_float *)(w[2]);
t_float *out = (t_float *)(w[3]);
int n = (int)(w[4]);
float f;
int mode = x->x_mode;
while (n--)
{
f = *in++;
switch(mode){
case(0):
if (round(f) != round(x->x_sample))
{
*out++ = f;
x->x_last = f;
}
else
{
*out++ = x->x_last;
}
break;
case(1):
if (round(f) == round(x->x_sample))
{
*out++ = f;
x->x_last = f;
}
else
{
*out++ = x->x_last;
}
}
}
return (w+5);
}
static void sieve_tilde_dsp(t_sieve_tilde *x, t_signal **sp)
{
dsp_add(sieve_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
void sieve_tilde_setup(void)
{
sieve_tilde_class = class_new(gensym("sieve~"), (t_newmethod)sieve_tilde_new, 0,
sizeof(t_sieve_tilde), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(sieve_tilde_class, t_sieve_tilde, x_f);
class_addmethod(sieve_tilde_class, (t_method)sieve_tilde_dsp, gensym("dsp"), 0);
}
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