transform_spectral_invert() [2/2]

template<OperationReadyData DataType>

DataType MayaFlux::Yantra::transform_spectral_invert	(	DataType &	input,
		uint32_t	window_size = 1024,
		uint32_t	hop_size = 256
	)

Spectral inversion (phase inversion in frequency domain) using C++20 ranges (IN-PLACE)

Template Parameters

DataType

OperationReadyData type

Parameters

input	Input data - WILL BE MODIFIED
window_size	FFT window size
hop_size	Hop size for overlap-add

Returns

Spectrally inverted data

Definition at line 362 of file SpectralHelper.hpp.

{
    auto [target_data, structure_info] = OperationHelper::extract_structured_double(input);
 
    auto processor = [](Eigen::VectorXcd& spectrum, size_t) {
        std::ranges::transform(spectrum, spectrum.begin(),
            [](const std::complex<double>& bin) { return std::conj(bin); });
    };
 
    for (auto& span : target_data) {
        auto result = process_spectral_windows(span, window_size, hop_size, processor);
        std::ranges::copy(result, span.begin());
    }
 
    auto reconstructed_data = target_data
        | std::views::transform([](const auto& span) {
              return std::vector<double>(span.begin(), span.end());
          })
        | std::ranges::to<std::vector>();
 
    return OperationHelper::reconstruct_from_double<DataType>(reconstructed_data, structure_info);
}

References MayaFlux::Yantra::OperationHelper::extract_structured_double(), and process_spectral_windows().

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