4 * a puredata wrapper for aubio zero crossing rate function
6 * Thanks to Johannes M Zmolnig for writing the excellent HOWTO:
7 * http://iem.kug.ac.at/pd/externals-HOWTO/
12 #include <aubio/aubio.h>
14 char aubiozcr_version[] = "aubiozcr~ version 0.1";
16 static t_class *aubiozcr_tilde_class;
18 void aubiozcr_tilde_setup (void);
20 typedef struct _aubiozcr_tilde
23 t_int pos; /*frames%dspblocksize*/
30 static t_int *aubiozcr_tilde_perform(t_int *w)
32 t_aubiozcr_tilde *x = (t_aubiozcr_tilde *)(w[1]);
33 t_sample *in = (t_sample *)(w[2]);
37 /* write input to datanew */
38 fvec_set_sample(x->vec, in[j], x->pos);
40 if (x->pos == x->bufsize-1) {
42 outlet_float(x->zcr, aubio_zero_crossing_rate(x->vec));
43 /* end of block loop */
44 x->pos = -1; /* so it will be zero next j loop */
51 static void aubiozcr_tilde_dsp(t_aubiozcr_tilde *x, t_signal **sp)
53 dsp_add(aubiozcr_tilde_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
56 static void aubiozcr_tilde_debug(t_aubiozcr_tilde *x)
58 post("aubiozcr~ bufsize:\t%d", x->bufsize);
59 post("aubiozcr~ audio in:\t%f", x->vec->data[0]);
62 static void *aubiozcr_tilde_new (void)
65 (t_aubiozcr_tilde *)pd_new(aubiozcr_tilde_class);
69 x->vec = (fvec_t *)new_fvec(x->bufsize);
71 x->zcr = outlet_new (&x->x_obj, &s_float);
72 post(aubiozcr_version);
76 void aubiozcr_tilde_setup (void)
78 aubiozcr_tilde_class = class_new (gensym ("aubiozcr~"),
79 (t_newmethod)aubiozcr_tilde_new,
80 0, sizeof (t_aubiozcr_tilde),
82 class_addmethod(aubiozcr_tilde_class,
83 (t_method)aubiozcr_tilde_dsp,
85 class_addmethod(aubiozcr_tilde_class,
86 (t_method)aubiozcr_tilde_debug,
88 CLASS_MAINSIGNALIN(aubiozcr_tilde_class,