FILT_ORDER        338 libavcodec/iirfilter.c                                         FF_FILTER_MODE_LOWPASS, FILT_ORDER,
FILT_ORDER        340 libavcodec/iirfilter.c     fstate  = ff_iir_filter_init_state(FILT_ORDER);
FILT_ORDER        112 libavcodec/psymodel.c                                              FF_FILTER_MODE_LOWPASS, FILT_ORDER,
FILT_ORDER        117 libavcodec/psymodel.c             ctx->fstate[i] = ff_iir_filter_init_state(FILT_ORDER);