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#include "defines.h"
/*--------------- vdelta ----------------------------*/
/* differences between element in succesive vectors */
static t_class *vdelta_class;
typedef struct _vdelta
{
t_object x_obj;
t_float m_c_leak;
t_float m_leak;
t_float *m_prev;
int m_n;
} t_vdelta;
static void vdelta_perform(t_vdelta *x, t_symbol *s, int argc, t_atom *argv)
{
int i;
t_atom *ap,*app;
t_float *fp;
t_float m_leak;
t_float m_c_leak;
m_leak=x->m_leak;
m_c_leak=x->m_c_leak;
if (argc!=x->m_n)
{
int i;
if (x->m_prev)
freebytes(x->m_prev,x->m_n);
x->m_prev=(t_float*)getbytes(argc*sizeof(t_float));
for(i=0;i<argc;i++)
x->m_prev[i]=0.0f;
x->m_n=argc;
}
fp=x->m_prev;
ap = (t_atom *)getbytes(sizeof(t_atom)*argc);
app=ap;
for (i = 0; i < argc; i++)
{
t_float f=atom_getfloat(argv++);
SETFLOAT(app, f-*fp);
app++;
*fp++=f;
}
outlet_list(x->x_obj.ob_outlet,gensym("list"),argc,ap);
freebytes(ap,argc);
}
static void *vdelta_new()
{
t_vdelta *x=(t_vdelta *)pd_new(vdelta_class);
outlet_new(&x->x_obj, gensym("list"));
x->m_n=0;
x->m_prev=0;
return (void *)x;
}
static void vdelta_free(t_vdelta *x)
{
freebytes(x->m_prev,x->m_n);
}
void vdelta_setup(void)
{
vdelta_class = class_new(gensym("vdelta"),
(t_newmethod)vdelta_new, (t_method)vdelta_free,
sizeof(t_vdelta),
CLASS_DEFAULT,
0);
class_addlist(vdelta_class, (t_method)vdelta_perform);
}
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