free(st->os_filt);
void encoder_destroy(EncState *st){   /* Free all allocated memory */   free(st->inBuf);   free(st->excBuf);   free(st->swBuf);      free(st->stack);   free(st->window);   free(st->buf2);   free(st->lpc);   free(st->interp_lpc);   free(st->interp_qlpc);   free(st->bw_lpc1);   free(st->bw_lpc2);   free(st->autocorr);   free(st->lagWindow);   free(st->lsp);   free(st->qlsp);   free(st->old_lsp);   free(st->interp_lsp);   free(st->old_qlsp);   free(st->interp_qlsp);   free(st->rc);   free(st->mem_sp);   free(st->mem_sw);   free(st->pi_gain);}