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/******************************************************
*
* zexy - implementation file
*
* copyleft (c) IOhannes m zm-bölnig-A
*
* 1999:forum::f-bür::umläute:2007-A
*
* institute of electronic music and acoustics (iem)
*
******************************************************
*
* license: GNU General Public License v.2
*
******************************************************/
/* based on tabread4~ which is part of pd */
#include "zexy.h"
/******************** tabread4~~ ***********************/
static t_class *tabread4_tilde_class;
typedef struct _tabread4_tilde
{
t_object x_obj;
int x_npoints;
zarray_t *x_vec;
t_symbol *x_arrayname;
t_float x_f;
} t_tabread4_tilde;
static void *tabread4_tilde_new(t_symbol *s)
{
t_tabread4_tilde *x = (t_tabread4_tilde *)pd_new(tabread4_tilde_class);
x->x_arrayname = s;
x->x_vec = 0;
x->x_npoints=0;
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
outlet_new(&x->x_obj, &s_signal);
x->x_f = 0;
return (x);
}
static t_int *tabread4_tilde_perform(t_int *w)
{
t_tabread4_tilde *x = (t_tabread4_tilde *)(w[1]);
t_sample *in = (t_sample *)(w[2]);
t_sample *in1 = (t_sample *)(w[3]);
t_sample *out = (t_sample *)(w[4]);
int n = (int)(w[5]);
int maxindex;
zarray_t *buf = x->x_vec, *wp;
int i;
maxindex = x->x_npoints - 3;
if (!buf){
while (n--) *out++ = 0;
return (w+6);
}
for (i = 0; i < n; i++)
{
t_sample in0_s=*in++;
t_sample in1_s=*in1++;
double findex = (double)in0_s + (double)in1_s;
long int index = findex;
double frac;
t_sample a, b, c, d, cminusb;
if (index < 1)
index = 1, frac = 0;
else if (index > maxindex)
index = maxindex, frac = 1;
else frac = findex - index;
wp = buf + index;
a = zarray_getfloat(wp,-1);
b = zarray_getfloat(wp, 0);
c = zarray_getfloat(wp, 1);
d = zarray_getfloat(wp, 2);
cminusb = c-b;
*out++ = b + frac * (
cminusb - 0.1666667f * (1.-frac) * (
(d - a - 3.0f * cminusb) * frac + (d + 2.0f*a - 3.0f*b)
)
);
}
return (w+6);
}
static void tabread4_tilde_set(t_tabread4_tilde *x, t_symbol *s)
{
t_garray *a;
x->x_arrayname = s;
if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
{
if (*s->s_name)
pd_error(x, "tabread4~~: %s: no such array", x->x_arrayname->s_name);
x->x_vec = 0;
}
else if (!zarray_getarray(a, &x->x_npoints, &x->x_vec))
{
pd_error(x, "%s: bad template for tabread4~~", x->x_arrayname->s_name);
x->x_vec = 0;
}
else garray_usedindsp(a);
}
static void tabread4_tilde_dsp(t_tabread4_tilde *x, t_signal **sp)
{
tabread4_tilde_set(x, x->x_arrayname);
dsp_add(tabread4_tilde_perform, 5, x,
sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n);
}
static void tabread4_tilde_free(t_tabread4_tilde *x)
{
}
void tabread4_tilde_tilde_setup(void)
{
tabread4_tilde_class = class_new(gensym("tabread4~~"),
(t_newmethod)tabread4_tilde_new, (t_method)tabread4_tilde_free,
sizeof(t_tabread4_tilde), 0, A_DEFSYM, 0);
CLASS_MAINSIGNALIN(tabread4_tilde_class, t_tabread4_tilde, x_f);
class_addmethod(tabread4_tilde_class, (t_method)tabread4_tilde_dsp,
gensym("dsp"), 0);
class_addmethod(tabread4_tilde_class, (t_method)tabread4_tilde_set,
gensym("set"), A_SYMBOL, 0);
zexy_register("tabread4~~");
}
void setup_tabread40x7e_tilde(void)
{
tabread4_tilde_tilde_setup();
}
void setup_tabread40x7e0x7e(void)
{
tabread4_tilde_tilde_setup();
}
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