czt.h

#pragma once
 
#include <dsplib/fft.h>
#include <memory>
 
namespace dsplib {
 
class CztPlanImpl;
 
class CztPlan : public FftPlanC
{
public:
    explicit CztPlan(int n, int m, cmplx_t w, cmplx_t a = 1);
 
    [[nodiscard]] arr_cmplx solve(span_t<cmplx_t> x) const final;
 
    void solve(span_t<cmplx_t> x, mut_span_t<cmplx_t> r) const final;
 
    [[nodiscard]] int size() const noexcept final;
 
private:
    std::shared_ptr<CztPlanImpl> _d;
};
 
arr_cmplx czt(span_t<cmplx_t> x, int m, cmplx_t w, cmplx_t a = 1);
 
}   // namespace dsplib