source: plugins/puredata/aubiopitch~.c @ 845f2d4

/**
 *
 * a puredata wrapper for aubio pitch 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.h>

char aubiopitch_version[] = "aubiopitch~ version 0.1";

aubio_pitchdetection_type type_pitch = aubio_pitch_mcomb;
aubio_pitchdetection_mode mode_pitch = aubio_pitchm_freq;

static t_class *aubiopitch_tilde_class;

void aubiopitch_tilde_setup (void);

typedef struct _aubiopitch_tilde 
{
        t_object x_obj;
        t_float threshold;      
        t_float threshold2;     
        t_int pos; /*frames%dspblocksize*/
        t_int bufsize;
        t_int hopsize;
        aubio_pitchdetection_t *o;
        fvec_t *vec;
        t_outlet *pitch;
} t_aubiopitch_tilde;

static t_int *aubiopitch_tilde_perform(t_int *w) 
{
        t_aubiopitch_tilde *x = (t_aubiopitch_tilde *)(w[1]);
        t_sample *in          = (t_sample *)(w[2]);
        int n                 = (int)(w[3]);
        int j;
        smpl_t pitch;
        for (j=0;j<n;j++) {
                /* write input to datanew */
                fvec_write_sample(x->vec, in[j], 0, x->pos);
                /*time for fft*/
                if (x->pos == x->hopsize-1) {         
                        /* block loop */
                        pitch = aubio_pitchdetection(x->o,x->vec);
                        outlet_float(x->pitch, pitch);
                        /* end of block loop */
                        x->pos = -1; /* so it will be zero next j loop */
                }
                x->pos++;
        }
        return (w+4);
}

static void aubiopitch_tilde_dsp(t_aubiopitch_tilde *x, t_signal **sp)
{
        dsp_add(aubiopitch_tilde_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
}

static void aubiopitch_tilde_debug(t_aubiopitch_tilde *x)
{
        post("aubiopitch~ bufsize:\t%d", x->bufsize);
        post("aubiopitch~ hopsize:\t%d", x->hopsize);
        post("aubiopitch~ threshold:\t%f", x->threshold);
        post("aubiopitch~ audio in:\t%f", x->vec->data[0][0]);
}

//static void *aubiopitch_tilde_new (t_floatarg f)
static void *aubiopitch_tilde_new (void)
{
        t_aubiopitch_tilde *x = 
                (t_aubiopitch_tilde *)pd_new(aubiopitch_tilde_class);

        x->bufsize   = 2048;
        x->hopsize   = x->bufsize / 2;

        //FIXME: get the real samplerate
        x->o = new_aubio_pitchdetection(x->bufsize*4, 
                    x->hopsize, 1, 44100., type_pitch, mode_pitch);
        x->vec = (fvec_t *)new_fvec(x->hopsize,1);

        //floatinlet_new (&x->x_obj, &x->threshold);
        x->pitch = outlet_new (&x->x_obj, &s_float);

        post(aubiopitch_version);
        return (void *)x;
}

static void *aubiopitch_tilde_del(t_aubiopitch_tilde *x)
{
        del_aubio_pitchdetection(x->o);
        del_fvec(x->vec);
        return 0;
}

void aubiopitch_tilde_setup (void)
{
        aubiopitch_tilde_class = class_new (gensym ("aubiopitch~"),
                        (t_newmethod)aubiopitch_tilde_new,
                        (t_method)aubiopitch_tilde_del,
                        sizeof (t_aubiopitch_tilde),
                        CLASS_DEFAULT, A_DEFFLOAT, 0);
        class_addmethod(aubiopitch_tilde_class, 
                        (t_method)aubiopitch_tilde_dsp, 
                        gensym("dsp"), 0);
        class_addmethod(aubiopitch_tilde_class, 
                        (t_method)aubiopitch_tilde_debug,
                        gensym("debug"), 0);
        class_sethelpsymbol(aubiopitch_tilde_class, 
                        gensym("help-aubiopitch~.pd"));
        CLASS_MAINSIGNALIN(aubiopitch_tilde_class, 
                        t_aubiopitch_tilde, threshold);
}