diff options
Diffstat (limited to 'source/lavg.c')
| -rw-r--r-- | source/lavg.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/source/lavg.c b/source/lavg.c new file mode 100644 index 0000000..fce0015 --- /dev/null +++ b/source/lavg.c @@ -0,0 +1,55 @@ +#include "defines.h"
+
+/*--------------- lavg ---------------*/
+
+static t_class *lavg_class;
+
+typedef struct _lavg
+{
+ t_object x_obj;
+ float m_avg;
+ float m_c_leak;
+ 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=0.0f;
+}
+
+static void lavg_setHalfDecay(t_lavg *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 *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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