33 static int create(sox_effect_t * effp, int argc, char **argv)  in create()  argument
35   priv_t * p = (priv_t *)effp->priv;  in create()
42   return argc? lsx_usage(effp) : SOX_SUCCESS;  in create()
45 static double * make_filter(sox_effect_t * effp)  in make_filter()  argument
47   priv_t * p = (priv_t *)effp->priv;  in make_filter()
49   sox_rate_t rate = effp->in_signal.rate;  in make_filter()
82 static sox_bool read_knots(sox_effect_t * effp)  in read_knots()  argument
84   priv_t * p = (priv_t *) effp->priv;  in read_knots()
85   FILE * file = lsx_open_input_file(effp, p->filename, sox_true);  in read_knots()
114 static int start(sox_effect_t * effp)  in start()  argument
116   priv_t * p = (priv_t *) effp->priv;  in start()
121     if (!p->num_knots && !read_knots(effp))  in start()
123     h = make_filter(effp);  in start()
124     if (effp->global_info->plot != sox_plot_off) {  in start()
125       lsx_plot_fir(h, p->n, effp->in_signal.rate,  in start()
126           effp->global_info->plot, "SoX effect: firfit", -30., +30.);  in start()
131   return lsx_dft_filter_effect_fn()->start(effp);  in start()