1 files changed, 54 insertions, 0 deletions
diff --git a/source/vrmstodb.c b/source/vrmstodb.c
new file mode 100644
index 0000000..d375bf9
--- /dev/null
+++ b/source/vrmstodb.c
@@ -0,0 +1,54 @@
+#include "defines.h"
+
+/*--------------- vrmstodb ----------------*/
+
+static t_class *vrmstodb_class;
+
+typedef struct _vrmstodb
+{
+    t_object x_obj;
+} t_vrmstodb;
+
+float rmstodb(float f)
+{
+    if (f <= 0) return (0);
+    else
+    {
+    	float val = (float)(100 + 20./LOGTEN * log(f));
+    	return (val < 0 ? 0 : val);
+    }
+}
+
+static void vrmstodb_perform(t_vrmstodb *x, t_symbol *s, int argc, t_atom *argv)
+{
+	int i;
+	t_atom *ap,*app;
+    ap = (t_atom *)getbytes(sizeof(t_atom)*argc);
+	app=ap;
+
+	for (i = 0; i < argc; i++)
+	{
+		SETFLOAT(app, rmstodb(atom_getfloat(argv++)));
+		app++;
+	}
+	outlet_list(x->x_obj.ob_outlet,gensym("list"),argc,ap);
+    freebytes(ap,argc);
+}
+
+static void *vrmstodb_new()
+{
+	t_vrmstodb *x=(t_vrmstodb *)pd_new(vrmstodb_class);
+	outlet_new(&x->x_obj, gensym("list"));
+	return (void *)x;
+}
+
+void vrmstodb_setup(void)
+{
+    vrmstodb_class = class_new(gensym("vrmstodb"),
+    	(t_newmethod)vrmstodb_new, 0,
+		sizeof(t_vrmstodb), 
+		CLASS_DEFAULT,
+	    0);
+    class_addlist(vrmstodb_class, (t_method)vrmstodb_perform);
+}
+