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#include "defines.h"
/*--------------- lmax ---------------*/
static t_class *lmax_class;
typedef struct _lmax
{
t_object x_obj;
float m_max;
float m_leak;
float m_c_leak;
} t_lmax;
static void lmax_perform(t_lmax *x, t_float in)
{
x->m_max=(in > x->m_max) ? in : x->m_max * x->m_c_leak + in * x->m_leak;
outlet_float(x->x_obj.ob_outlet, x->m_max);
}
static void lmax_setHalfDecay(t_lmax *x, t_float halfDecayTime)
{
x->m_c_leak=(float)powf(.5,(1.0f/halfDecayTime));
x->m_leak=1.0f-x->m_c_leak;
}
static void lmax_clear(t_lmax *x)
{
x->m_max= - MAXFLOAT;
}
static void *lmax_new( t_float halfDecayTime)
{
t_lmax *x=(t_lmax *)pd_new(lmax_class);
outlet_new(&x->x_obj, gensym("float"));
lmax_setHalfDecay(x, halfDecayTime);
lmax_clear(x);
return (void *)x;
}
void lmax_setup(void)
{
lmax_class = class_new(gensym("lmax"),
(t_newmethod)lmax_new, 0,
sizeof(t_lmax),
CLASS_DEFAULT,
A_DEFFLOAT, 0);
class_addfloat(lmax_class, (t_method)lmax_perform);
class_addmethod(lmax_class, (t_method)lmax_clear,
gensym("clear"), A_GIMME, NULL);
class_addmethod(lmax_class, (t_method)lmax_setHalfDecay,
gensym("decay"), A_DEFFLOAT, NULL);
}
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