From 086e6b358ad45bda0e6a948cfb7ea2d33ab7da5a Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Wed, 10 Feb 2010 00:34:05 +0000 Subject: 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 --- lavg.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 lavg.c (limited to 'lavg.c') diff --git a/lavg.c b/lavg.c new file mode 100644 index 0000000..fce0015 --- /dev/null +++ b/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); +} + -- cgit v1.2.1