From 79096fd626b946efd6947fa94ab15d30bf003ba0 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Thu, 19 Aug 2010 05:04:28 +0000
Subject: converted to new library template and debianized

svn path=/trunk/externals/ekext/; revision=13835
---
 weightonset.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 weightonset.c

(limited to 'weightonset.c')

diff --git a/weightonset.c b/weightonset.c
new file mode 100644
index 0000000..44265a2
--- /dev/null
+++ b/weightonset.c
@@ -0,0 +1,106 @@
+#include "m_pd.h"
+#include <math.h>
+
+typedef struct _datachunk
+{
+  t_atom data[1024];
+} t_datachunk;
+
+typedef struct _weightonset
+{
+  t_object x_obj;
+  t_float multiplier, accumulator, divider, divaccum, weighted, increment;
+  t_float length, attack;
+  t_datachunk x_datachunk;
+  t_outlet *waverage, *datachunk;
+} t_weightonset;
+
+t_class *weightonset_class;
+
+void weightonset_float (t_weightonset *x, t_floatarg fin)
+{
+  if(x->length < 1024)
+    {
+      int len = (int)x->length;
+      SETFLOAT(&x->x_datachunk.data[len], fin);
+      if(x->length < x->attack)
+	{
+	  int i;
+	  float weight = 1;
+	  x->increment = x->length - x->attack;
+	  for(i=0;i<x->increment;i++)
+	    {
+	      weight = weight*x->multiplier;
+	    }
+	  x->accumulator += fin*weight; 
+	  x->divaccum += weight;
+	  x->weighted = x->accumulator / x->divaccum;
+	  outlet_float(x->waverage, x->weighted);
+	}
+      else if(x->length == x->attack)
+	{
+	  x->divider = 1;
+	  x->divaccum += 1;
+	  x->accumulator += fin*x->divider;
+	  x->weighted = x->accumulator / x->divaccum;
+	  x->divider *= x->multiplier;
+	  x->divaccum += x->divider;
+	  outlet_float(x->waverage, x->weighted);
+	}
+      else
+	{
+	  x->accumulator += fin*x->divider;
+	  x->weighted = x->accumulator / x->divaccum;
+	  x->divider *= x->multiplier;
+	  x->divaccum += x->divider;
+	  outlet_float(x->waverage, x->weighted);
+	}
+      x->length += 1;
+    }
+}
+
+void weightonset_bang (t_weightonset *x)
+{
+  int (len) = (int)x->length;
+  outlet_list(x->datachunk, gensym("list"), len, x->x_datachunk.data);
+  x->accumulator = 0;
+  x->length = 0;
+  if(x->attack > 0)
+    {
+      x->divider = 1;
+      x->divaccum = 1;
+    }
+  else if (x->attack == 0)
+    {
+      x->divider = 0;
+      x->divaccum = 0;
+    }
+}
+
+void *weightonset_new(t_floatarg f1, t_floatarg f2) 
+{
+  t_weightonset *x = (t_weightonset *)pd_new(weightonset_class);
+  x->multiplier = f1 != 0 ? f1 : 0.5;
+  x->accumulator = 0;
+  x->divider = f2 > 0 ? 1 : 0;
+  x->divaccum = f2 > 0 ? 1 : 0;
+  x->length = 0;
+  x->attack = f2;
+  floatinlet_new(&x->x_obj, &x->multiplier);
+  floatinlet_new(&x->x_obj, &x->attack);
+  x->waverage = outlet_new(&x->x_obj, &s_float);
+  x->datachunk = outlet_new(&x->x_obj, &s_list);
+  return (void *)x;
+}
+
+void weightonset_setup(void) {
+  weightonset_class = class_new(gensym("weightonset"),
+  (t_newmethod)weightonset_new,
+  0, sizeof(t_weightonset),
+  0, A_DEFFLOAT, A_DEFFLOAT, 0);
+  post("input values become less and less important");
+  post("as entropy brings alternative rewards");
+  class_sethelpsymbol(weightonset_class, gensym("help-weightonset"));
+  class_addbang(weightonset_class, weightonset_bang);
+  class_addfloat(weightonset_class, weightonset_float);
+}
-- 
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