29 virtual std::unique_ptr<Filter>
clone()
const = 0;
Filter used to pre-filter a double-precision floating point data stream.
virtual std::unique_ptr< Filter > clone() const =0
Clone a filter, to generate a copy.
virtual void filter(vd &inout)=0
Filter input, and provides output in same array as input.
virtual void reset()=0
Reset filter state to 0 (history was all-zero).