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/******************************************************
* zexy - implementation file
*
* copyleft (c) IOhannes m zmölnig
*
* 1999:forum::für::umläute:2004
*
* institute of electronic music and acoustics (iem)
*
******************************************************
*
* license: GNU General Public License v.2
*
******************************************************/
#include "zexy.h"
/* ------------------------------------------------------------------------------ */
/* mux~ : multiplex a specified signal to the output */
static t_class *mux_class;
typedef struct _mux {
t_object x_obj;
int input;
int n_in;
t_float **in;
} t_mux;
static void mux_input(t_mux *x, t_floatarg f)
{
if ((f>=0)&&(f<x->n_in)){
x->input=f;
} else
error("multiplex: %d is channel out of range (0..%d)", (int)f, x->n_in);
}
static t_int *mux_perform(t_int *w)
{
t_mux *x = (t_mux *)(w[1]);
t_float *out = (t_float *)(w[2]);
int n = (int)(w[3]);
t_float *in = x->in[x->input];
while(n--)*out++=*in++;
return (w+4);
}
static void mux_dsp(t_mux *x, t_signal **sp)
{
int n = 0;
t_float **dummy=x->in;
for(n=0;n<x->n_in;n++)*dummy++=sp[n]->s_vec;
dsp_add(mux_perform, 3, x, sp[n]->s_vec, sp[0]->s_n);
}
static void mux_helper(void)
{
post("\n%c mux~\t:: multiplex a one of various signals to one outlet", HEARTSYMBOL);
post("<#out>\t : the inlet-number (counting from 0) witch is routed to the outlet"
"'help'\t : view this");
post("creation : \"mux~ [arg1 [arg2...]]\"\t: the number of arguments equals the number of inlets\n");
}
static void mux_free(t_mux *x)
{
freebytes(x->in, x->n_in * sizeof(t_float *));
}
static void *mux_new(t_symbol *s, int argc, t_atom *argv)
{
t_mux *x = (t_mux *)pd_new(mux_class);
int i;
if (!argc)argc=2;
x->n_in=argc;
x->input=0;
argc--;
while(argc--)inlet_new(&x->x_obj,&x->x_obj.ob_pd,&s_signal,&s_signal);
x->in = (t_float **)getbytes(x->n_in * sizeof(t_float *));
i=x->n_in;
while(i--)x->in[i]=0;
outlet_new(&x->x_obj, gensym("signal"));
return (x);
}
void multiplex_tilde_setup(void)
{
mux_class = class_new(gensym("multiplex~"), (t_newmethod)mux_new, (t_method)mux_free, sizeof(t_mux), 0, A_GIMME, 0);
class_addcreator((t_newmethod)mux_new, gensym("mux~"), A_GIMME, 0);
class_addfloat(mux_class, mux_input);
class_addmethod(mux_class, (t_method)mux_dsp, gensym("dsp"), 0);
class_addmethod(mux_class, nullfn, gensym("signal"), 0);
class_addmethod(mux_class, (t_method)mux_helper, gensym("help"), 0);
class_sethelpsymbol(mux_class, gensym("zexy/multiplex~"));
zexy_register("multiplex~");
}
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