146 static int estimate_best_order(double *ref, int min_order, int max_order)  in estimate_best_order()  argument
151     for(i=max_order-1; i>=min_order-1; i--) {  in estimate_best_order()
203                       int max_order, int precision,  in ff_lpc_calc_coefs()  argument
214     av_assert2(max_order >= MIN_LPC_ORDER && max_order <= MAX_LPC_ORDER &&  in ff_lpc_calc_coefs()
219     if (blocksize != s->blocksize || max_order != s->max_order ||  in ff_lpc_calc_coefs()
222         ff_lpc_init(s, blocksize, max_order, lpc_type);  in ff_lpc_calc_coefs()
231         s->lpc_compute_autocorr(s->windowed_samples, blocksize, max_order, autoc);  in ff_lpc_calc_coefs()
233         compute_lpc_coefs(autoc, max_order, &lpc[0][0], MAX_LPC_ORDER, 0, 1);  in ff_lpc_calc_coefs()
235         for(i=0; i<max_order; i++)  in ff_lpc_calc_coefs()
247         for(j=0; j<max_order; j++)  in ff_lpc_calc_coefs()
248             m[0].coeff[max_order-1][j] = -lpc[max_order-1][j];  in ff_lpc_calc_coefs()
251             avpriv_init_lls(&m[pass&1], max_order);  in ff_lpc_calc_coefs()
254             for(i=max_order; i<blocksize; i++){  in ff_lpc_calc_coefs()
255                 for(j=0; j<=max_order; j++)  in ff_lpc_calc_coefs()
260                     eval= m[pass&1].evaluate_lls(&m[(pass-1)&1], var+1, max_order-1);  in ff_lpc_calc_coefs()
264                     for(j=0; j<=max_order; j++)  in ff_lpc_calc_coefs()
275         for(i=0; i<max_order; i++){  in ff_lpc_calc_coefs()
276             for(j=0; j<max_order; j++)  in ff_lpc_calc_coefs()
278             ref[i]= sqrt(m[(pass-1)&1].variance[i] / weight) * (blocksize - max_order) / 4000;  in ff_lpc_calc_coefs()
280         for(i=max_order-1; i>0; i--)  in ff_lpc_calc_coefs()
284     opt_order = max_order;  in ff_lpc_calc_coefs()
287         opt_order = estimate_best_order(ref, min_order, max_order);  in ff_lpc_calc_coefs()
292         for(i=min_order-1; i<max_order; i++) {  in ff_lpc_calc_coefs()
301 av_cold int ff_lpc_init(LPCContext *s, int blocksize, int max_order,  in ff_lpc_init()  argument
305     s->max_order = max_order;  in ff_lpc_init()
308     s->windowed_buffer = av_mallocz((blocksize + 2 + FFALIGN(max_order, 4)) *  in ff_lpc_init()
312     s->windowed_samples = s->windowed_buffer + FFALIGN(max_order, 4);  in ff_lpc_init()