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#include "defines.h"
/*--------------- lavg ---------------*/
static t_class *lavg_class;
typedef struct _lavg
{
t_object x_obj;
t_float m_avg;
t_float m_c_leak;
t_float m_leak;
} t_lavg;
static void lavg_perform(t_lavg *x, t_float in)
{
x->m_avg= x->m_avg * x->m_c_leak + in * x->m_leak;
outlet_float(x->x_obj.ob_outlet, x->m_avg);
}
static void lavg_clear(t_lavg *x)
{
x->m_avg=0.0;
}
static void lavg_setHalfDecay(t_lavg *x, t_float halfDecayTime)
{
x->m_c_leak=(t_float)powf(.5,(1.0/halfDecayTime));
x->m_leak=1.0-x->m_c_leak;
}
static void *lavg_new( t_float halfDecayTime)
{
t_lavg *x=(t_lavg *)pd_new(lavg_class);
outlet_new(&x->x_obj, gensym("float"));
lavg_setHalfDecay(x, halfDecayTime);
return (void *)x;
}
void lavg_setup(void)
{
lavg_class = class_new(gensym("lavg"),
(t_newmethod)lavg_new, 0,
sizeof(t_lavg),
CLASS_DEFAULT,
A_DEFFLOAT, 0);
class_addfloat(lavg_class, (t_method)lavg_perform);
class_addmethod(lavg_class, (t_method)lavg_setHalfDecay,
gensym("decay"), A_DEFFLOAT, NULL);
class_addmethod(lavg_class, (t_method)lavg_clear,
gensym("clear"), 0);
}
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