source: plugins/puredata/aubioquiet~.c @ 61680aa

/**
 *
 * a puredata wrapper for aubioquiet
 *
 * 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 aubioquiet_version[] = "aubioquiet~ version 0.1";

static t_class *aubioquiet_tilde_class;

void aubioquiet_tilde_setup (void);

typedef struct _aubioquiet_tilde 
{
        t_object x_obj;
        t_float threshold;
        t_int pos; /*frames%dspblocksize*/
        t_int bufsize;
        t_int hopsize;
        t_int wassilence;
        t_int issilence;
        fvec_t *vec;
        t_outlet *quietbang;
        t_outlet *noisybang;
} t_aubioquiet_tilde;

static t_int *aubioquiet_tilde_perform(t_int *w) 
{
        t_aubioquiet_tilde *x = (t_aubioquiet_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_write_sample(x->vec, in[j], 0, x->pos);
                /*time for fft*/
                if (x->pos == x->hopsize-1) {         
                        /* block loop */
                        if (aubio_silence_detection(x->vec, x->threshold)==1) {
                                if (x->wassilence==1) {
                                        x->issilence = 1;
                                } else {
                                        x->issilence = 2;
                                        outlet_bang(x->quietbang);
                                }
                                x->wassilence=1;
                        } else { 
                                if (x->wassilence<=0) {
                                        x->issilence = 0;
                                } else {
                                        x->issilence = -1;
                                        outlet_bang(x->noisybang);
                                }
                                x->wassilence=0;
                        }
                        /* end of block loop */
                        x->pos = -1; /* so it will be zero next j loop */
                }
                x->pos++;
        }
        return (w+4);
}

static void aubioquiet_tilde_dsp(t_aubioquiet_tilde *x, t_signal **sp)
{
        dsp_add(aubioquiet_tilde_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
}

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

static void *aubioquiet_tilde_new (t_floatarg f)
{
        t_aubioquiet_tilde *x = 
                (t_aubioquiet_tilde *)pd_new(aubioquiet_tilde_class);

        x->threshold = (f < -1000.) ? -70 : (f >= 0.) ? -70. : f;
        x->bufsize   = 1024;
        x->hopsize   = x->bufsize / 2;

        x->vec = (fvec_t *)new_fvec(x->hopsize,1);
        x->wassilence = 1;

        floatinlet_new (&x->x_obj, &x->threshold);
        x->quietbang = outlet_new (&x->x_obj, &s_bang);
        x->noisybang = outlet_new (&x->x_obj, &s_bang);
        post(aubioquiet_version);
        return (void *)x;
}

void aubioquiet_tilde_setup (void)
{
        aubioquiet_tilde_class = class_new (gensym ("aubioquiet~"),
                        (t_newmethod)aubioquiet_tilde_new,
                        0, sizeof (t_aubioquiet_tilde),
                        CLASS_DEFAULT, A_DEFFLOAT, 0);
        class_addmethod(aubioquiet_tilde_class, 
                        (t_method)aubioquiet_tilde_dsp, 
                        gensym("dsp"), 0);
        class_addmethod(aubioquiet_tilde_class, 
                        (t_method)aubioquiet_tilde_debug,
                        gensym("debug"), 0);
        class_sethelpsymbol(aubioquiet_tilde_class, 
                        gensym("help-aubioquiet~.pd"));
        CLASS_MAINSIGNALIN(aubioquiet_tilde_class, 
                        t_aubioquiet_tilde, threshold);
}