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#include "defines.h"
/*--------------- vrmstodb ----------------*/
static t_class *vrmstodb_class;
typedef struct _vrmstodb
{
t_object x_obj;
} t_vrmstodb;
static t_float rmstodecibel(t_float f)
{
if (f <= 0) return (0);
else
{
t_float val = (t_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, rmstodecibel(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);
}
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