1 files changed, 45 insertions, 0 deletions
diff --git a/src/iemlib1/v2db.c b/src/iemlib1/v2db.c
new file mode 100644
index 0000000..b3e342d
--- /dev/null
+++ b/src/iemlib1/v2db.c
@@ -0,0 +1,45 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+/* ---------------- v2db - value to dB converter. ----------------- */
+
+static t_class *v2db_class;
+
+float v2db(float f)
+{
+    return (f <= 0 ? -199.9 : 8.6858896381*log(f));
+}
+
+static void v2db_float(t_object *x, t_float f)
+{
+    outlet_float(x->ob_outlet, v2db(f));
+}
+
+static void *v2db_new(void)
+{
+    t_object *x = (t_object *)pd_new(v2db_class);
+    outlet_new(x, &s_float);
+    return (x);
+}
+
+void v2db_setup(void)
+{
+    v2db_class = class_new(gensym("v2db"), v2db_new, 0,
+    	sizeof(t_object), 0, 0);
+    class_addfloat(v2db_class, (t_method)v2db_float);
+    class_sethelpsymbol(v2db_class, gensym("iemhelp/help-v2db"));
+}