fft.hpp

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// toolboxes/signal/include/nk/signal/transforms/fft.hpp
#pragma once
 
#include <memory_resource>
#include <nk/value/span.hpp>
#include <nk/value/value.hpp>
 
namespace nk::signal {

 

Value fft(const Value &                x,
          int                          n   = -1,
          int                          dim = 0,
          std::pmr::memory_resource *  mr  = nullptr);

Value ifft(const Value &                X,
           int                          n   = -1,
           int                          dim = 0,
           std::pmr::memory_resource *  mr  = nullptr);

Value ifftSymmetric(const Value &                X,
                    int                          n   = -1,
                    int                          dim = 0,
                    std::pmr::memory_resource *  mr  = nullptr);

Value fft2(const Value &                X,
           int                          m  = -1,
           int                          n  = -1,
           std::pmr::memory_resource *  mr = nullptr);

Value ifft2(const Value &X, int m = -1, int n = -1,
            std::pmr::memory_resource *mr = nullptr);

Value ifft2Symmetric(const Value &X, std::pmr::memory_resource *mr = nullptr);

Value fftn(const Value &              X,
           Span<const std::size_t>    sz = {},
           std::pmr::memory_resource *mr = nullptr);

Value ifftn(const Value &              X,
            Span<const std::size_t>    sz = {},
            std::pmr::memory_resource *mr = nullptr);

Value czt(const Value &                x,
          int                          m,
          Complex                      w,
          Complex                      a,
          std::pmr::memory_resource *  mr = nullptr);

Value interpft(const Value &                x,
               int                          n,
               int                          dim = 0,
               std::pmr::memory_resource *  mr  = nullptr);
 

} // namespace nk::signal