ff_iir_filter     128 libavcodec/iirfilter.h void ff_iir_filter(const struct FFIIRFilterCoeffs *coeffs, struct FFIIRFilterState *state,
ff_iir_filter      46 libavcodec/tests/iirfilter.c     ff_iir_filter(fcoeffs, fstate, SIZE, x, 1, y, 1);