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-rw-r--r--iemlib1/src/db2v.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/iemlib1/src/db2v.c b/iemlib1/src/db2v.c
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+++ b/iemlib1/src/db2v.c
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+/* 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 - 2006 */
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include <math.h>
+
+/* -------- db2v - a techn. dB to rms-value converter. --------- */
+
+static t_class *db2v_class;
+
+t_float db2v(t_float f)
+{
+ return (f <= -199.9 ? 0 : exp(0.11512925465 * f));
+}
+
+static void db2v_float(t_object *x, t_floatarg f)
+{
+ outlet_float(x->ob_outlet, db2v(f));
+}
+
+static void *db2v_new(void)
+{
+ t_object *x = (t_object *)pd_new(db2v_class);
+ outlet_new(x, &s_float);
+ return (x);
+}
+
+void db2v_setup(void)
+{
+ db2v_class = class_new(gensym("db2v"), db2v_new, 0,
+ sizeof(t_object), 0, 0);
+ class_addfloat(db2v_class, (t_method)db2v_float);
+// class_sethelpsymbol(db2v_class, gensym("iemhelp/help-db2v"));
+}