From 6b378329aa20ec2caa3f06968c2ac71d41dca7f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Tue, 17 May 2005 16:50:28 +0000
Subject: renamed *_tilde.c-files to *~.c

svn path=/trunk/externals/zexy/; revision=2998
---
 src/demultiplex~.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 src/demultiplex~.c

(limited to 'src/demultiplex~.c')

diff --git a/src/demultiplex~.c b/src/demultiplex~.c
new file mode 100644
index 0000000..4d78583
--- /dev/null
+++ b/src/demultiplex~.c
@@ -0,0 +1,119 @@
+/******************************************************
+ *
+ * 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;
+
+	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~");
+}
-- 
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