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#include "defines.h"
/*--------------- lhist ---------------*/
static t_class *lhist_class;
typedef struct _lhist
{
t_object x_obj;
float m_lo;
float m_hi;
float m_scale;
float m_c_leak;
float m_leak;
int m_nbins;
// int m_n_observations;
float *m_lhist;
} t_lhist;
static void lhist_setHalfDecay(t_lhist *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 lhist_perform_float(t_lhist *x, t_float f)
{
int j;
j=(int)(.5+(f-x->m_lo)*x->m_scale);
j=(j>0)?(j<x->m_nbins?j:x->m_nbins-1):0; // limit without IF
x->m_lhist[j]++;
// x->m_n_observations++;
}
static void lhist_perform_list(t_lhist *x, t_symbol *s, int argc, t_atom *argv)
{
int i,j;
for (i = 0; i < argc; i++)
{
j=(int)(.5f+(atom_getfloat(&argv[i])-x->m_lo)*x->m_scale);
j=(j>0)?(j<x->m_nbins?j:x->m_nbins-1):0; // limit without IF
x->m_lhist[j]++;
}
// x->m_n_observations+=argc;
}
static void lhist_leak(t_lhist *x)
{
int i;
float *f;
float sc;
f=x->m_lhist;
sc=x->m_c_leak;
i=x->m_nbins;
while(i--)
*f++*=sc;
}
static void lhist_bang(t_lhist *x)
{
int i,n;
float *f;
t_atom *ap,*app;
n=x->m_nbins;
ap = (t_atom *)getbytes(sizeof(t_atom)*n);
app=ap;
i=n;
f=x->m_lhist;
while(i--){
SETFLOAT(app, *f);
f++;
app++;
}
outlet_list(x->x_obj.ob_outlet,gensym("list"),n,ap);
freebytes(ap,n);
}
static void lhist_relative(t_lhist *x)
{
int i,n;
float *f;
float invn,sum;
t_atom *ap,*app;
n=x->m_nbins;
ap = (t_atom *)getbytes(sizeof(t_atom)*n);
app=ap;
i=x->m_nbins;
f=x->m_lhist;
sum=0.0f;
while(i--) sum+=*f++;
invn=1.0f/(1e-10f+sum);
i=x->m_nbins;
f=x->m_lhist;
while(i--){
SETFLOAT(app, (*f*invn));
f++;
app++;
}
outlet_list(x->x_obj.ob_outlet,gensym("list"),n,ap);
freebytes(ap,n);
}
static void lhist_clear(t_lhist *x)
{
int i;
float *f;
f=x->m_lhist;
for (i=0;i<x->m_nbins;i++)
*f++=0.0f;
// x->m_n_observations=0;
}
static void lhist_set(t_lhist *x, t_float lo, t_float hi, t_float nbins)
{
if (nbins<1)
{
nbins=1;
post("lhist: number of bins is minimum 1...");
}
if (hi<=lo)
{
post("lhist: higher bound must be higher than lower bound...");
hi=lo+1.0f;
}
freebytes(x->m_lhist, x->m_nbins);
x->m_hi=hi;
x->m_lo=lo;
x->m_nbins=(int)nbins;
x->m_scale=(float)x->m_nbins/(hi-lo);
x->m_lhist = (float*)getbytes(sizeof(float)*x->m_nbins);
lhist_clear(x);
}
static void *lhist_new(t_float lo, t_float hi, t_float nbins, t_float decay)
{
t_lhist *x=(t_lhist *)pd_new(lhist_class);
outlet_new(&x->x_obj, gensym("list"));
lhist_setHalfDecay(x,decay);
x->m_nbins=0;
x->m_lhist=0;
lhist_set(x, lo, hi, nbins);
return (void *)x;
}
static void lhist_free(t_lhist *x)
{
freebytes(x->m_lhist, x->m_nbins);
}
void lhist_setup(void)
{
lhist_class = class_new(gensym("lhist"),
(t_newmethod)lhist_new, (t_method)lhist_free,
sizeof(t_lhist),
CLASS_DEFAULT,
A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT,A_DEFFLOAT,0);
class_addmethod(lhist_class, (t_method)lhist_clear, gensym("clear"),0);
class_addmethod(lhist_class, (t_method)lhist_bang, gensym("absolute"),0);
class_addmethod(lhist_class, (t_method)lhist_relative, gensym("relative"),0);
class_addmethod(lhist_class, (t_method)lhist_leak, gensym("leak"),0);
class_addmethod(lhist_class, (t_method)lhist_setHalfDecay,
gensym("decay"), A_DEFFLOAT, NULL);
class_addlist(lhist_class, (t_method)lhist_perform_list);
class_addfloat(lhist_class, (t_method)lhist_perform_float);
class_addbang(lhist_class, (t_method)lhist_bang);
}
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