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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"
/* ------------------------------------------------------------------------------ */
/* demux~ : demultiplex a signal to a specified output */
static t_class *demux_class;
typedef struct _demux {
t_object x_obj;
int output;
int n_out;
t_float **out;
} t_demux;
static void demux_output(t_demux *x, t_floatarg f)
{
if ((f>=0)&&(f<x->n_out)){
x->output=f;
} else
error("demultiplex: %d is channel out of range (0..%d)", (int)f, x->n_out);
}
static t_int *demux_perform(t_int *w)
{
t_demux *x = (t_demux *)(w[1]);
t_float *in = (t_float *)(w[2]);
int N = (int)(w[3]);
int n = N;
int channel=x->n_out;
while(channel--){
t_float*out=x->out[channel];
n=N;
if(x->output==channel){
while(n--)*out++=*in++;
} else
while(n--)*out++=0.f;
}
return (w+4);
}
static void demux_dsp(t_demux *x, t_signal **sp)
{
int n = x->n_out;
t_float **dummy=x->out;
while(n--)*dummy++=sp[x->n_out-n]->s_vec;
dsp_add(demux_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
}
static void demux_helper(void)
{
post("\n%c demux~\t:: demultiplex a signal to one of various outlets", HEARTSYMBOL);
post("<#out>\t : the outlet-number (counting from 0) to witch the inlet is routed"
"'help'\t : view this");
post("creation : \"demux~ [arg1 [arg2...]]\"\t: the number of arguments equals the number of outlets\n");
}
static void demux_free(t_demux *x)
{
freebytes(x->out, x->n_out * sizeof(t_float *));
}
static void *demux_new(t_symbol *s, int argc, t_atom *argv)
{
t_demux *x = (t_demux *)pd_new(demux_class);
int i;
ZEXY_USEVAR(s);
ZEXY_USEVAR(argv);
if (!argc)argc=2;
x->n_out=argc;
x->output=0;
while(argc--)outlet_new(&x->x_obj, gensym("signal"));
x->out = (t_float **)getbytes(x->n_out * sizeof(t_float *));
i=x->n_out;
while(i--)x->out[i]=0;
return (x);
}
void demultiplex_tilde_setup(void)
{
demux_class = class_new(gensym("demultiplex~"), (t_newmethod)demux_new, (t_method)demux_free, sizeof(t_demux), 0, A_GIMME, 0);
class_addcreator((t_newmethod)demux_new, gensym("demux~"), A_GIMME, 0);
class_addfloat(demux_class, demux_output);
class_addmethod(demux_class, (t_method)demux_dsp, gensym("dsp"), 0);
class_addmethod(demux_class, nullfn, gensym("signal"), 0);
class_addmethod(demux_class, (t_method)demux_helper, gensym("help"), 0);
class_sethelpsymbol(demux_class, gensym("zexy/demultiplex~"));
zexy_register("demultiplex~");
}
void demux_tilde_setup(void)
{
demultiplex_tilde_setup();
}
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