From 2b60d55c919e7588f5aff15936e83c300b3660bb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Tue, 22 Mar 2005 20:58:25 +0000
Subject: zexy-2.0: - use of abstractions for objects that allow it - some
 objects are build both as externals and abstractions (as slower fallbacks) -
 code-layout is now 1:1 c-file<->object (this should allow for building of
 zexy as  a collection of externals instead as a big library) - matrix-objects
 have moved to iemmatrix !!

svn path=/trunk/externals/zexy/; revision=2641
---
 src/avg_tilde.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 src/avg_tilde.c

(limited to 'src/avg_tilde.c')

diff --git a/src/avg_tilde.c b/src/avg_tilde.c
new file mode 100644
index 0000000..5011cee
--- /dev/null
+++ b/src/avg_tilde.c
@@ -0,0 +1,85 @@
+/******************************************************
+ *
+ * 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"
+#include <math.h>
+
+/* ------------------------ average~ ----------------------------- */
+
+/* tilde object to take absolute value. */
+
+static t_class *avg_class;
+
+typedef struct _avg
+{
+    t_object x_obj;
+
+	t_float n_inv;
+	t_float buf;
+	int blocks;
+} t_avg;
+
+
+/* average :: arithmetic mean of one signal-vector */
+
+static t_int *avg_perform(t_int *w)
+{
+    t_float *in = (t_float *)(w[1]);
+
+	t_avg *x = (t_avg *)w[2];
+    int n = (int)(w[3]);
+
+	t_float buf = 0.;
+
+    while (n--)
+    {
+		buf += *in++;
+    }
+    outlet_float(x->x_obj.ob_outlet, buf*x->n_inv);
+
+    return (w+4);
+}
+
+static void avg_dsp(t_avg *x, t_signal **sp)
+{
+	x->n_inv=1./sp[0]->s_n;
+    dsp_add(avg_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
+}
+
+static void *avg_new(void)
+{
+    t_avg *x = (t_avg *)pd_new(avg_class);
+    outlet_new(&x->x_obj, gensym("float"));
+    return (x);
+}
+
+static void avg_help(void)
+{
+	post("avg~\t:: outputs the arithmetic mean of each signal-vector");
+}
+
+
+void avg_tilde_setup(void)
+{
+    avg_class = class_new(gensym("avg~"), (t_newmethod)avg_new, 0,
+    	sizeof(t_avg), 0, A_DEFFLOAT, 0);
+    class_addmethod(avg_class, nullfn, gensym("signal"), 0);
+    class_addmethod(avg_class, (t_method)avg_dsp, gensym("dsp"), 0);
+
+	class_addmethod(avg_class, (t_method)avg_help, gensym("help"), 0);
+	class_sethelpsymbol(avg_class, gensym("zexy/avg~"));
+  zexy_register("avg~");
+}
-- 
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