1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
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 - 2005 */
#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 - a rms-value to techn. 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"));
}
|
