iir_filter        410 libavcodec/aacpsy.c                 v = iir_filter(la[i*128+j], pch->iir_state);
iir_filter        906 libavcodec/g723_1.c         iir_filter(filter_coef[0], filter_coef[1], buf + i,
iir_filter       1687 libavcodec/g723_1.c         iir_filter(flt_coef + 2 * l, flt_coef + 2 * l + LPC_ORDER, vector + i,