diff options
Diffstat (limited to 'source/lmax.c')
| -rw-r--r-- | source/lmax.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/source/lmax.c b/source/lmax.c new file mode 100644 index 0000000..911304f --- /dev/null +++ b/source/lmax.c @@ -0,0 +1,57 @@ +#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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