diff options
| author | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2010-02-10 00:34:05 +0000 |
|---|---|---|
| committer | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2010-02-10 00:34:05 +0000 |
| commit | 086e6b358ad45bda0e6a948cfb7ea2d33ab7da5a (patch) | |
| tree | b87b0adfbfd8f9b9439d8bf528b63b64f23dce03 /lavg.c | |
| parent | 98e3e1214cf71a62b2de938c9c7e07f6bdd0090c (diff) | |
re-arranged into libdir and setup with the template Makefile+debian stuff. renabled vv+ and vv- as vvplus and vvminus
svn path=/trunk/externals/smlib/; revision=13158
Diffstat (limited to 'lavg.c')
| -rw-r--r-- | lavg.c | 55 |
1 files changed, 55 insertions, 0 deletions
@@ -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);
+}
+
|