/*
 * mulitplex   :  multiplex a specified input to the output
 *
 * (c) 1999-2011 IOhannes m zmölnig, forum::für::umläute, institute of electronic music and acoustics (iem)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


/* 1903:forum::für::umläute:2005 */

/*
 * THINK: should the selector-inlet be the first or the last ???
 * pros/cons:
 *  the 1st inlet being the selector is not consistant with pd (hot/cold)
 *   but as it since the hot inlet is selectable, the whole object is not really consitant
 *  numbering would have to start with 1 (for the 1st not-leftmost inlet)
 * if the selector is rightmost this would mean: cold is right(most), hot is (somewhere) left
 * numbering would be ok
 *
 * conclusio: make the selector rightmost
 *
 */

#include "zexy.h"
#include <stdio.h>


/* ------------------------- mux ------------------------------- */

/*
  a multiplexer
*/

static t_class *mux_class;
static t_class *muxproxy_class;

typedef struct _mux {
  t_object x_obj;
  struct _muxproxy  **x_proxy;

  int i_count;
  int i_selected;
  t_inlet **in;
} t_mux;


typedef struct _muxproxy {
  t_pd  p_pd;
  t_mux    *p_master;
  int id;
} t_muxproxy;

static void mux_select(t_mux *x, t_float f)
{
  x->i_selected=f;
}

static void mux_anything(t_muxproxy *y, t_symbol *s, int argc,
                         t_atom *argv)
{
  t_mux*x=y->p_master;
  if(y->id==x->i_selected) {
    outlet_anything(x->x_obj.ob_outlet, s, argc, argv);
  }
}

static void *mux_new(t_symbol *s, int argc, t_atom *argv)
{
  int n = (argc < 2)?2:argc;
  t_mux *x = (t_mux *)pd_new(mux_class);

  x->i_selected=0;
  x->i_count = n;
  x->in = (t_inlet **)getbytes(x->i_count * sizeof(t_inlet *));
  x->x_proxy = (t_muxproxy**)getbytes(x->i_count * sizeof(t_muxproxy*));

  for (n = 0; n<x->i_count; n++) {
    x->x_proxy[n]=(t_muxproxy*)pd_new(muxproxy_class);
    x->x_proxy[n]->p_master = x;
    x->x_proxy[n]->id=n;
    x->in[n] = inlet_new ((t_object*)x, (t_pd*)x->x_proxy[n], 0,0);
  }

  inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym(""));

  outlet_new(&x->x_obj, 0);
  return (x);
}

static void mux_free(t_mux*x)
{
  const int count = x->i_count;

  if(x->in && x->x_proxy) {
    int n=0;
    for(n=0; n<count; n++) {
      if(x->in[n]) {
        inlet_free(x->in[n]);
      }
      x->in[n]=0;
      if(x->x_proxy[n]) {
        t_muxproxy *y=x->x_proxy[n];
        y->p_master=0;
        y->id=0;
        pd_free(&y->p_pd);
      }
      x->x_proxy[n]=0;
    }
    freebytes(x->in, x->i_count * sizeof(t_inlet *));
    freebytes(x->x_proxy, x->i_count * sizeof(t_muxproxy*));
  }

  /* pd_free(&y->p_pd); */
}

void multiplex_setup(void)
{
  mux_class = class_new(gensym("multiplex"), (t_newmethod)mux_new,
                        (t_method)mux_free, sizeof(t_mux), CLASS_NOINLET, A_GIMME,  0);
  class_addcreator((t_newmethod)mux_new, gensym("mux"), A_GIMME, 0);

  class_addmethod   (mux_class, (t_method)mux_select, gensym(""), A_DEFFLOAT,
                     0);

  muxproxy_class = class_new(0, 0, 0,
                             sizeof(t_muxproxy),
                             CLASS_PD | CLASS_NOINLET, 0);
  class_addanything(muxproxy_class, mux_anything);


  zexy_register("multiplex");
}

void mux_setup(void)
{
  multiplex_setup();
}