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23 #ifndef INCLUDED_FFT_GOERTZEL_FC_H
24 #define INCLUDED_FFT_GOERTZEL_FC_H
43 static sptr make(
int rate,
int len,
float freq);
45 virtual void set_freq (
float freq) = 0;
47 virtual void set_rate (
int rate) = 0;
49 virtual float freq() = 0;
51 virtual int rate() = 0;