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#include "defines.h"
/*--------------- hist ---------------*/
static t_class *hist_class;
typedef struct _hist
{
t_object x_obj;
float m_lo;
float m_hi;
float m_scale;
int m_nbins;
int m_n_observations;
float *m_hist;
} t_hist;
static void hist_perform_float(t_hist *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_hist[j]++;
x->m_n_observations++;
}
static void hist_perform_list(t_hist *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_hist[j]++;
}
x->m_n_observations+=argc;
}
static void hist_bang(t_hist *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=x->m_nbins;
f=x->m_hist;
while(i--){
SETFLOAT(app, *f);
f++;
app++;
}
outlet_list(x->x_obj.ob_outlet,gensym("list"),n,ap);
freebytes(ap, sizeof(t_atom)*n);
}
static void hist_relative(t_hist *x)
{
int i,n;
float *f;
float invn;
t_atom *ap,*app;
n=x->m_nbins;
ap = (t_atom *)getbytes(sizeof(t_atom)*n);
app=ap;
invn=1.0f/(1e-10f+x->m_n_observations);
i=n;
f=x->m_hist;
while(i--){
SETFLOAT(app, (*f*invn));
f++;
app++;
}
outlet_list(x->x_obj.ob_outlet,gensym("list"),n,ap);
freebytes(ap, sizeof(t_atom)*n);
}
static void hist_clear(t_hist *x)
{
int i;
float *f;
f=x->m_hist;
for (i=0;i<x->m_nbins;i++)
*f++=0.0f;
x->m_n_observations=0;
}
static void hist_set(t_hist *x, t_float lo, t_float hi, t_float nbins)
{
if (nbins<1)
{
nbins=1;
post("hist: number of bins is minimum 1...");
}
if (hi<=lo)
{
post("hist: higher bound must be higher than lower bound...");
hi=lo+1.0f;
}
freebytes(x->m_hist, 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_hist = (float*)getbytes(sizeof(float)*x->m_nbins);
hist_clear(x);
}
static void *hist_new(t_float lo, t_float hi, t_float nbins)
{
t_hist *x=(t_hist *)pd_new(hist_class);
outlet_new(&x->x_obj, gensym("list"));
x->m_hist=0;
x->m_nbins=0;
hist_set(x, lo, hi, nbins);
return (void *)x;
}
static void hist_free(t_hist *x)
{
freebytes(x->m_hist, x->m_nbins);
}
void hist_setup(void)
{
hist_class = class_new(gensym("hist"),
(t_newmethod)hist_new, (t_method)hist_free,
sizeof(t_hist),
CLASS_DEFAULT,
A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT,0);
class_addmethod(hist_class, (t_method)hist_clear, gensym("clear"),0);
class_addmethod(hist_class, (t_method)hist_bang, gensym("absolute"),0);
class_addmethod(hist_class, (t_method)hist_relative, gensym("relative"),0);
class_addmethod(hist_class, (t_method)hist_set, gensym("set"),A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT,0);
class_addlist(hist_class, (t_method)hist_perform_list);
class_addfloat(hist_class, (t_method)hist_perform_float);
class_addbang(hist_class, (t_method)hist_bang);
}
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