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#include "m_pd.h"
#define MIN(a,b) (((a)<(b))?(a):(b))
static t_class *tab_derivate_class;
typedef struct _tab_derivate {
t_object x_obj;
t_symbol *x_arrayname_src1;
t_symbol *x_arrayname_dst;
t_outlet *b_out;
} t_tab_derivate;
void *tab_derivate_new(t_symbol *s_src1, t_symbol *s_dst) {
t_tab_derivate *x = (t_tab_derivate *)pd_new(tab_derivate_class);
x->x_arrayname_src1 = s_src1;
x->x_arrayname_dst = s_dst;
x->b_out = outlet_new(&x->x_obj, &s_bang);
return (void *)x;
}
void tab_derivate_compute(t_tab_derivate *x, t_float nb) {
t_garray *a_src1, *a_dst;
int npoints_src1, npoints_dst;
t_word *vec_src1, *vec_dst;
t_float tmp2, tmp1;
int nb_derivate, i;
if (!(a_src1 = (t_garray *)pd_findbyclass(x->x_arrayname_src1, garray_class)))
pd_error(x, "%s: no such array", x->x_arrayname_src1->s_name);
else if (!garray_getfloatwords(a_src1, &npoints_src1, &vec_src1))
pd_error(x, "%s: bad template for tab_derivate", x->x_arrayname_src1->s_name);
else if (!(a_dst = (t_garray *)pd_findbyclass(x->x_arrayname_dst, garray_class)))
pd_error(x, "%s: no such array", x->x_arrayname_dst->s_name);
else if (!garray_getfloatwords(a_dst, &npoints_dst, &vec_dst))
pd_error(x, "%s: bad template for tab_derivate", x->x_arrayname_dst->s_name);
else
{
nb_derivate = MIN(npoints_src1, npoints_dst);
// post("nb_derivate = %d",nb_derivate);
if (nb > 0)
nb_derivate = MIN(nb_derivate, nb);
tmp1 = 0;
for (i=0; i<nb_derivate;i++) {
tmp2 = vec_src1[i].w_float;
vec_dst[i].w_float = tmp2 - tmp1;
tmp1 = tmp2;
}
garray_redraw(a_dst);
}
outlet_bang(x->b_out);
}
void tab_derivate_bang(t_tab_derivate *x) {
tab_derivate_compute(x, -1) ;
}
void tab_derivate_float(t_tab_derivate *x, t_float nb) {
tab_derivate_compute(x, nb) ;
}
void tab_derivate_src1(t_tab_derivate *x, t_symbol *s_src) {
x->x_arrayname_src1 = s_src;
}
void tab_derivate_dst(t_tab_derivate *x, t_symbol *s_dst) {
x->x_arrayname_dst = s_dst;
}
void tab_derivate_setup(void) {
tab_derivate_class = class_new(gensym("tab_derivate"), (t_newmethod)tab_derivate_new,
0, sizeof(t_tab_derivate), CLASS_DEFAULT, A_DEFSYM, A_DEFSYM, A_DEFSYM, 0);
class_addbang(tab_derivate_class, tab_derivate_bang);
class_addfloat(tab_derivate_class, tab_derivate_float);
class_addmethod(tab_derivate_class, (t_method)tab_derivate_src1, gensym("src1"), A_DEFSYM, 0);
class_addmethod(tab_derivate_class, (t_method)tab_derivate_dst, gensym("dst"), A_DEFSYM, 0);
}
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