src/aubiopitch~.c

   1 /**
   2  *
   3  * a puredata wrapper for aubio pitch detection functions
   4  *
   5  * Thanks to Johannes M Zmolnig for writing the excellent HOWTO:
   6  *       http://iem.kug.ac.at/pd/externals-HOWTO/
   7  *
   8  * */
   9
  10 #include <m_pd.h>
  11 #include <aubio/aubio.h>
  12 #include <string.h>
  13
  14 char aubiopitch_version[] = "aubiopitch~ version " PACKAGE_VERSION;
  15
  16 static t_class *aubiopitch_tilde_class;
  17
  18 void aubiopitch_tilde_setup (void);
  19
  20 typedef struct _aubiopitch_tilde
  21 {
  22   t_object x_obj;
  23   t_float threshold;
  24   t_int pos; /*frames%dspblocksize*/
  25   t_int bufsize;
  26   t_int hopsize;
  27   aubio_pitch_t *o;
  28   fvec_t *vec;
  29   fvec_t *pitchvec;
  30   t_outlet *pitch;
  31 } t_aubiopitch_tilde;
  32
  33 static t_int *aubiopitch_tilde_perform(t_int *w)
  34 {
  35   t_aubiopitch_tilde *x = (t_aubiopitch_tilde *)(w[1]);
  36   t_sample *in          = (t_sample *)(w[2]);
  37   int n                 = (int)(w[3]);
  38   int j;
  39   for (j=0;j<n;j++) {
  40     /* write input to datanew */
  41     fvec_set_sample(x->vec, in[j], x->pos);
  42     /*time for fft*/
  43     if (x->pos == x->hopsize-1) {
  44       /* block loop */
  45       aubio_pitch_do(x->o, x->vec, x->pitchvec);
  46       outlet_float(x->pitch, x->pitchvec->data[0]);
  47       /* end of block loop */
  48       x->pos = -1; /* so it will be zero next j loop */
  49     }
  50     x->pos++;
  51   }
  52   return (w+4);
  53 }
  54
  55 static void aubiopitch_tilde_dsp(t_aubiopitch_tilde *x, t_signal **sp)
  56 {
  57   dsp_add(aubiopitch_tilde_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
  58 }
  59
  60 static void aubiopitch_tilde_debug(t_aubiopitch_tilde *x)
  61 {
  62   post(aubiopitch_version);
  63   post("aubiopitch~ bufsize:\t%d", x->bufsize);
  64   post("aubiopitch~ hopsize:\t%d", x->hopsize);
  65   post("aubiopitch~ threshold:\t%f", x->threshold);
  66   post("aubiopitch~ audio in:\t%f", x->vec->data[0]);
  67 }
  68
  69 //static void *aubiopitch_tilde_new (t_floatarg f)
  70 static void *aubiopitch_tilde_new (t_symbol * s)
  71 {
  72   t_aubiopitch_tilde *x =
  73     (t_aubiopitch_tilde *)pd_new(aubiopitch_tilde_class);
  74
  75   x->bufsize = 2048;
  76   x->hopsize = x->bufsize / 2;
  77
  78   x->o = new_aubio_pitch(s->s_name, x->bufsize,
  79       x->hopsize, (uint_t)sys_getsr() );
  80   aubio_pitch_set_tolerance (x->o, 0.7);
  81   x->vec = (fvec_t *)new_fvec(x->hopsize);
  82   x->pitchvec = (fvec_t *)new_fvec(1);
  83
  84   //floatinlet_new (&x->x_obj, &x->threshold);
  85   x->pitch = outlet_new (&x->x_obj, &s_float);
  86
  87   return (void *)x;
  88 }
  89
  90 void aubiopitch_tilde_del(t_aubiopitch_tilde *x)
  91 {
  92   outlet_free(x->pitch);
  93   del_aubio_pitch(x->o);
  94   del_fvec(x->vec);
  95   del_fvec(x->pitchvec);
  96 }
  97
  98 void aubiopitch_tilde_setup (void)
  99 {
 100   aubiopitch_tilde_class = class_new (gensym ("aubiopitch~"),
 101       (t_newmethod)aubiopitch_tilde_new,
 102       (t_method)aubiopitch_tilde_del,
 103       sizeof (t_aubiopitch_tilde),
 104       CLASS_DEFAULT, A_DEFSYMBOL, 0);
 105   class_addmethod(aubiopitch_tilde_class,
 106       (t_method)aubiopitch_tilde_dsp,
 107       gensym("dsp"), 0);
 108   class_addmethod(aubiopitch_tilde_class,
 109       (t_method)aubiopitch_tilde_debug,
 110       gensym("debug"), 0);
 111   CLASS_MAINSIGNALIN(aubiopitch_tilde_class,
 112       t_aubiopitch_tilde, threshold);
 113 }