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function fir(fir_state<T, U> &, E1 &&) fir

template <typename T, typename U, typename E1>
[[deprecated("fir(state, expr) is deprecated. Use fir(expr, std::ref(state))")]] KFR_INTRINSIC expression_fir<
    T, U, E1, true>
fir(fir_state<T, U>& state, E1&& e1)

Returns template expression that applies FIR filter to the input

Parameters
state FIR filter state (state is referenced, ensure proper lifetime)
e1 an input expression

Defined at dsp/fir.hpp:299