FFIIRFilterState  100 libavcodec/iirfilter.c struct FFIIRFilterState* ff_iir_filter_init_state(int order)
FFIIRFilterState  102 libavcodec/iirfilter.c     FFIIRFilterState* s = av_mallocz(sizeof(FFIIRFilterState) + sizeof(s->x[0]) * (order - 1));
FFIIRFilterState   33 libavcodec/iirfilter.h struct FFIIRFilterState;
FFIIRFilterState   73 libavcodec/iirfilter.h struct FFIIRFilterState* ff_iir_filter_init_state(int order);