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 /lmax.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 'lmax.c')
-rw-r--r-- | lmax.c | 57 |
1 files changed, 57 insertions, 0 deletions
@@ -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);
+}
+
|