mirror of
https://github.com/TorqueGameEngines/Torque3D.git
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a745fc3757
added libraries: opus flac libsndfile updated: libvorbis libogg openal - Everything works as expected for now. Bare in mind libsndfile needed the check for whether or not it could find the xiph libraries removed in order for this to work.
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
#ifndef ALCOMPLEX_H
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#define ALCOMPLEX_H
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#include <complex>
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#include <type_traits>
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#include "alspan.h"
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/**
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* Iterative implementation of 2-radix FFT (In-place algorithm). Sign = -1 is
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* FFT and 1 is inverse FFT. Applies the Discrete Fourier Transform (DFT) to
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* the data supplied in the buffer, which MUST BE power of two.
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*/
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template<typename Real>
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std::enable_if_t<std::is_floating_point<Real>::value>
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complex_fft(const al::span<std::complex<Real>> buffer, const al::type_identity_t<Real> sign);
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/**
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* Calculate the frequency-domain response of the time-domain signal in the
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* provided buffer, which MUST BE power of two.
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*/
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template<typename Real, size_t N>
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std::enable_if_t<std::is_floating_point<Real>::value>
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forward_fft(const al::span<std::complex<Real>,N> buffer)
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{ complex_fft(buffer.subspan(0), -1); }
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/**
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* Calculate the time-domain signal of the frequency-domain response in the
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* provided buffer, which MUST BE power of two.
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*/
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template<typename Real, size_t N>
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std::enable_if_t<std::is_floating_point<Real>::value>
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inverse_fft(const al::span<std::complex<Real>,N> buffer)
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{ complex_fft(buffer.subspan(0), 1); }
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/**
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* Calculate the complex helical sequence (discrete-time analytical signal) of
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* the given input using the discrete Hilbert transform (In-place algorithm).
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* Fills the buffer with the discrete-time analytical signal stored in the
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* buffer. The buffer is an array of complex numbers and MUST BE power of two,
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* and the imaginary components should be cleared to 0.
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*/
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void complex_hilbert(const al::span<std::complex<double>> buffer);
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#endif /* ALCOMPLEX_H */
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