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#include "defines.h"
/*--------------- lmin ---------------*/
static t_class *lmin_class;
typedef struct _lmin
{
t_object x_obj;
t_float m_min;
t_float m_leak;
t_float m_c_leak;
} t_lmin;
static void lmin_perform(t_lmin *x, t_float in)
{
x->m_min=(in < x->m_min) ? in : x->m_min * x->m_c_leak + in * x->m_leak;
outlet_float(x->x_obj.ob_outlet, x->m_min);
}
static void lmin_setHalfDecay(t_lmin *x, t_float halfDecayTime)
{
x->m_c_leak=(t_float)powf(.5,(1.0f/halfDecayTime));
x->m_leak=1.0f-x->m_c_leak;
}
static void lmin_clear(t_lmin *x)
{
x->m_min= MAXFLOAT;
}
static void *lmin_new( t_float halfDecayTime)
{
t_lmin *x=(t_lmin *)pd_new(lmin_class);
outlet_new(&x->x_obj, gensym("float"));
lmin_setHalfDecay(x, halfDecayTime);
lmin_clear(x);
return (void *)x;
}
void lmin_setup(void)
{
lmin_class = class_new(gensym("lmin"),
(t_newmethod)lmin_new, 0,
sizeof(t_lmin),
CLASS_DEFAULT,
A_DEFFLOAT, 0);
class_addfloat(lmin_class, (t_method)lmin_perform);
class_addmethod(lmin_class, (t_method)lmin_clear,
gensym("clear"), A_GIMME, NULL);
class_addmethod(lmin_class, (t_method)lmin_setHalfDecay,
gensym("decay"), A_DEFFLOAT, NULL);
}
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