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/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
iem_dp written by IOhannes m zmoelnig, Thomas Musil, Copyright (c) IEM KUG Graz Austria 1999 - 2007 */
/* double precision library */
#include "m_pd.h"
#include "iemlib.h"
#include "iem_dp.h"
/* -------------------------- tabread4__ ------------------------------ */
/* based on miller's tabread4 which is part of pd */
static t_class *tabread4_dp_class;
typedef struct _tabread4_dp
{
t_object x_obj;
t_symbol *x_arrayname;
t_float x_residual;
} t_tabread4_dp;
static void *tabread4_dp_new(t_symbol *s)
{
t_tabread4_dp *x = (t_tabread4_dp *)pd_new(tabread4_dp_class);
x->x_arrayname = s;
floatinlet_new(&x->x_obj, &x->x_residual);
outlet_new(&x->x_obj, &s_float);
return (x);
}
static void tabread4_dp_float(t_tabread4_dp *x, t_floatarg f)
{
t_garray *ga;
iemarray_t *vec;
int npoints;
if(!(ga = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
{
if(*x->x_arrayname->s_name)
pd_error(x, "tabread4__: %s: no such array", x->x_arrayname->s_name);
iemarray_setfloat(vec, 0, 0.0f);
}
else if (!iemarray_getarray(ga, &npoints, &vec))
{
pd_error(x, "%s: bad template for tabread4__", x->x_arrayname->s_name);
iemarray_setfloat(vec, 0, 0.0f);
}
else
{
double findex = iem_dp_calc_sum(f, x->x_residual);
double frac;
int index = findex;
int maxindex = npoints - 3;
t_sample a, b, c, d, cmb;
if(index < 1)
index = 1, frac = 0;
else if (index > maxindex)
index = maxindex, frac = 1;
else frac = findex - index;
vec += index;
a = iemarray_getfloat(vec,-1);
b = iemarray_getfloat(vec, 0);
c = iemarray_getfloat(vec, 1);
d = iemarray_getfloat(vec, 2);
cmb = c-b;
outlet_float(x->x_obj.ob_outlet, (npoints ? b+frac*(cmb-0.1666667f*(1.-frac)*((d-a-3.0f*cmb)*frac+(d+2.0f*a-3.0f*b))) : 0));
}
}
static void tabread4_dp_set(t_tabread4_dp *x, t_symbol *s)
{
x->x_arrayname = s;
}
static void tabread4_dp_free(t_tabread4_dp *x)
{
}
void tabread4_dp_setup(void)
{
tabread4_dp_class = class_new(gensym("tabread4__"),
(t_newmethod)tabread4_dp_new, (t_method)tabread4_dp_free,
sizeof(t_tabread4_dp), 0, A_DEFSYM, 0);
class_addcreator((t_newmethod)tabread4_dp_new, gensym("tabread4''"), A_DEFSYM, 0);
class_addfloat(tabread4_dp_class, (t_method)tabread4_dp_float);
class_addmethod(tabread4_dp_class, (t_method)tabread4_dp_set, gensym("set"), A_SYMBOL, 0);
}
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