--- /dev/null
+/**
+ *
+ * a puredata wrapper for aubio tempo detection functions
+ *
+ * Thanks to Johannes M Zmolnig for writing the excellent HOWTO:
+ * http://iem.kug.ac.at/pd/externals-HOWTO/
+ *
+ * */
+
+#include <m_pd.h>
+#include <aubio/aubio.h>
+
+char aubiotempo_version[] = "aubiotempo~ version " PACKAGE_VERSION;
+
+static t_class *aubiotempo_tilde_class;
+
+void aubiotempo_tilde_setup (void);
+
+typedef struct _aubiotempo_tilde
+{
+ t_object x_obj;
+ t_float threshold;
+ t_float silence;
+ t_int pos; /*frames%dspblocksize*/
+ t_int bufsize;
+ t_int hopsize;
+ aubio_tempo_t * t;
+ fvec_t *vec;
+ fvec_t *output;
+ t_outlet *tempobang;
+ t_outlet *onsetbang;
+} t_aubiotempo_tilde;
+
+static t_int *aubiotempo_tilde_perform(t_int *w)
+{
+ t_aubiotempo_tilde *x = (t_aubiotempo_tilde *)(w[1]);
+ t_sample *in = (t_sample *)(w[2]);
+ int n = (int)(w[3]);
+ int j;
+ for (j=0;j<n;j++) {
+ /* write input to datanew */
+ fvec_set_sample(x->vec, in[j], x->pos);
+ /*time for fft*/
+ if (x->pos == x->hopsize-1) {
+ /* block loop */
+ aubio_tempo_do (x->t, x->vec, x->output);
+ if (x->output->data[0]) {
+ outlet_bang(x->tempobang);
+ }
+ if (x->output->data[1]) {
+ outlet_bang(x->onsetbang);
+ }
+ /* end of block loop */
+ x->pos = -1; /* so it will be zero next j loop */
+ }
+ x->pos++;
+ }
+ return (w+4);
+}
+
+static void aubiotempo_tilde_dsp(t_aubiotempo_tilde *x, t_signal **sp)
+{
+ dsp_add(aubiotempo_tilde_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
+}
+
+static void aubiotempo_tilde_debug(t_aubiotempo_tilde *x)
+{
+ post("aubiotempo~ bufsize:\t%d", x->bufsize);
+ post("aubiotempo~ hopsize:\t%d", x->hopsize);
+ post("aubiotempo~ threshold:\t%f", x->threshold);
+ post("aubiotempo~ audio in:\t%f", x->vec->data[0]);
+}
+
+static void *aubiotempo_tilde_new (t_floatarg f)
+{
+ t_aubiotempo_tilde *x =
+ (t_aubiotempo_tilde *)pd_new(aubiotempo_tilde_class);
+
+ x->threshold = (f < 1e-5) ? 0.1 : (f > 10.) ? 10. : f;
+ x->silence = -70.;
+ /* should get from block~ size */
+ x->bufsize = 1024;
+ x->hopsize = x->bufsize / 2;
+
+ x->t = new_aubio_tempo ("specdiff", x->bufsize, x->hopsize,
+ (uint_t) sys_getsr ());
+ aubio_tempo_set_silence(x->t,x->silence);
+ aubio_tempo_set_threshold(x->t,x->threshold);
+ x->output = (fvec_t *)new_fvec(2);
+ x->vec = (fvec_t *)new_fvec(x->hopsize);
+
+ floatinlet_new (&x->x_obj, &x->threshold);
+ x->tempobang = outlet_new (&x->x_obj, &s_bang);
+ x->onsetbang = outlet_new (&x->x_obj, &s_bang);
+ post(aubiotempo_version);
+ return (void *)x;
+}
+
+static void *aubiotempo_tilde_del(t_aubiotempo_tilde *x)
+{
+ if(x->t) del_aubio_tempo(x->t);
+ if(x->output) del_fvec(x->output);
+ if(x->vec) del_fvec(x->vec);
+ return 0;
+}
+
+void aubiotempo_tilde_setup (void)
+{
+ aubiotempo_tilde_class = class_new (gensym ("aubiotempo~"),
+ (t_newmethod)aubiotempo_tilde_new,
+ (t_method)aubiotempo_tilde_del,
+ sizeof (t_aubiotempo_tilde),
+ CLASS_DEFAULT, A_DEFFLOAT, 0);
+ class_addmethod(aubiotempo_tilde_class,
+ (t_method)aubiotempo_tilde_dsp,
+ gensym("dsp"), 0);
+ class_addmethod(aubiotempo_tilde_class,
+ (t_method)aubiotempo_tilde_debug,
+ gensym("debug"), 0);
+ CLASS_MAINSIGNALIN(aubiotempo_tilde_class,
+ t_aubiotempo_tilde, threshold);
+}