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Viewing changes to lmax.c

  • Committer: Bazaar Package Importer
  • Author(s): Hans-Christoph Steiner
  • Date: 2010-11-10 15:17:58 UTC
  • Revision ID: james.westby@ubuntu.com-20101110151758-3acjf69kiudo3gh4
Tags: upstream-0.12.1
Import upstream version 0.12.1

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Lines of Context:
lmax.c
 
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#include "defines.h"
 
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/*--------------- lmax ---------------*/
 
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static t_class *lmax_class;
 
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typedef struct _lmax
 
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{
 
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    t_object x_obj;
 
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        float m_max;
 
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        float m_leak;
 
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        float m_c_leak;
 
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} t_lmax;
 
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static void lmax_perform(t_lmax *x, t_float in)
 
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{
 
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        x->m_max=(in > x->m_max) ? in : x->m_max * x->m_c_leak + in * x->m_leak;
 
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    outlet_float(x->x_obj.ob_outlet, x->m_max);
 
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}
 
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static void lmax_setHalfDecay(t_lmax *x, t_float halfDecayTime)
 
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{
 
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        x->m_c_leak=(float)powf(.5,(1.0f/halfDecayTime));
 
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        x->m_leak=1.0f-x->m_c_leak;
 
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}
 
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static void lmax_clear(t_lmax *x)
 
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{
 
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        x->m_max= - MAXFLOAT;
 
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}
 
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static void *lmax_new( t_float halfDecayTime)
 
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{
 
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        t_lmax *x=(t_lmax *)pd_new(lmax_class);
 
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        outlet_new(&x->x_obj, gensym("float"));
 
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        lmax_setHalfDecay(x, halfDecayTime);
 
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        lmax_clear(x);
 
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        return (void *)x;
 
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}
 
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void lmax_setup(void)
 
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{
 
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    lmax_class = class_new(gensym("lmax"),
 
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        (t_newmethod)lmax_new, 0,
 
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                sizeof(t_lmax), 
 
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                CLASS_DEFAULT,
 
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            A_DEFFLOAT, 0);
 
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    class_addfloat(lmax_class, (t_method)lmax_perform);
 
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        class_addmethod(lmax_class, (t_method)lmax_clear,
 
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        gensym("clear"), A_GIMME, NULL);
 
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        class_addmethod(lmax_class, (t_method)lmax_setHalfDecay,
 
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        gensym("decay"), A_DEFFLOAT, NULL);
 
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}
 
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