//! \~\file pifft.h
//! \~\ingroup Math
//! \~\ingroup FFTW
//! \~\brief
//! \~english FFT, IFFT and Hilbert transformations
//! \~russian БПФ, ОБПФ и преобразования Гильберта
/*
    PIP - Platform Independent Primitives
    Class for FFT, IFFT and Hilbert transformations
    Andrey Bychkov work.a.b@yandex.ru, Ivan Pelipenko peri4ko@yandex.ru

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
//! \defgroup FFTW FFTW
//! \~\brief
//! \~english Optimized FFT support via libfftw3
//! \~russian Оптимизированный БПФ с помощью libfftw3
//!
//! \~\details
//! \~english \section cmake_module_FFTW Building with CMake
//! \~russian \section cmake_module_FFTW Сборка с использованием CMake
//!
//! \~\code
//! find_package(PIP REQUIRED)
//! target_link_libraries([target] PIP::FFTW)
//! \endcode
//!
//! \~english \par Common
//! \~russian \par Общее
//!
//! \~english
//! These files provides FFT using [libfftw3](https://fftw.org/)
//!
//! \~russian
//! Эти файлы обеспечивают БПФ с использованием [libfftw3](https://fftw.org/)
//!
//! \~\authors
//! \~english
//! Ivan Pelipenko peri4ko@yandex.ru;
//! Andrey Bychkov work.a.b@yandex.ru;
//! \~russian
//! Иван Пелипенко peri4ko@yandex.ru;
//! Андрей Бычков work.a.b@yandex.ru;
//!

#ifndef PIFFT_H
#define PIFFT_H

#include "pifftbase.h"
#include "pip_export.h"
#include "pip_fftw_export.h"

#ifdef PIP_HAS_FFT


//! \~\ingroup Math
//! \~\brief
//! \~english Thin wrapper over PocketFFT library for a selected scalar type.
//! \~russian Тонкая обертка над библиотекой PocketFFT для выбранного скалярного типа.
template<typename T>
class PIP_EXPORT PIFFT: public PIFFTBase<T> {
public:
	const PIVector<complex<T>> & calcFFT(const PIVector<complex<T>> & in) override;
	const PIVector<complex<T>> & calcFFT(const PIVector<T> & in) override;
	const PIVector<complex<T>> & calcFFTinverse(const PIVector<complex<T>> & in) override;
};


template<>
class PIP_EXPORT PIFFT<float>: public PIFFTBase<float> {
public:
	const PIVector<complex<float>> & calcFFT(const PIVector<complex<float>> & in) override;
	const PIVector<complex<float>> & calcFFT(const PIVector<float> & in) override;
	const PIVector<complex<float>> & calcFFTinverse(const PIVector<complex<float>> & in) override;

private:
	PRIVATE_DECLARATION(PIP_EXPORT)
};


template<>
class PIP_EXPORT PIFFT<double>: public PIFFTBase<double> {
public:
	const PIVector<complex<double>> & calcFFT(const PIVector<complex<double>> & in) override;
	const PIVector<complex<double>> & calcFFT(const PIVector<double> & in) override;
	const PIVector<complex<double>> & calcFFTinverse(const PIVector<complex<double>> & in) override;

private:
	PRIVATE_DECLARATION(PIP_EXPORT)
};


template<>
class PIP_EXPORT PIFFT<ldouble>: public PIFFTBase<ldouble> {
public:
	const PIVector<complex<ldouble>> & calcFFT(const PIVector<complex<ldouble>> & in) override;
	const PIVector<complex<ldouble>> & calcFFT(const PIVector<ldouble> & in) override;
	const PIVector<complex<ldouble>> & calcFFTinverse(const PIVector<complex<ldouble>> & in) override;

private:
	PRIVATE_DECLARATION(PIP_EXPORT)
};


//! \~english Single-precision FFT wrapper.
//! \~russian Обертка FFT одинарной точности.
typedef PIFFT<float> PIFFTf;

//! \~english Double-precision FFT wrapper.
//! \~russian Обертка FFT двойной точности.
typedef PIFFT<double> PIFFTd;

//! \~english Extended-precision FFT wrapper.
//! \~russian Обертка FFT расширенной точности.
typedef PIFFT<ldouble> PIFFTld;


//! \~\ingroup Math
//! \~\ingroup FFTW
//! \~\brief
//! \~english Thin wrapper over libfftw3 plans for a selected scalar type.
//! \~russian Тонкая обертка над планами libfftw3 для выбранного скалярного типа.
template<typename T>
class PIP_FFTW_EXPORT PIFFTW: public PIFFTBase<T> {
public:
	const PIVector<complex<T>> & calcFFT(const PIVector<complex<T>> & in) override;
	const PIVector<complex<T>> & calcFFT(const PIVector<T> & in) override;
	const PIVector<complex<T>> & calcFFTinverse(const PIVector<complex<T>> & in) override;
	bool prepareForSize(size_t count) override;

private:
};


template<>
class PIP_FFTW_EXPORT PIFFTW<float>: public PIFFTBase<float> {
public:
	const PIVector<complex<float>> & calcFFT(const PIVector<complex<float>> & in) override;
	const PIVector<complex<float>> & calcFFT(const PIVector<float> & in) override;
	const PIVector<complex<float>> & calcFFTinverse(const PIVector<complex<float>> & in) override;
	bool prepareForSize(size_t count) override;

private:
	PRIVATE_DECLARATION(PIP_FFTW_EXPORT)
};


template<>
class PIP_FFTW_EXPORT PIFFTW<double>: public PIFFTBase<double> {
public:
	const PIVector<complex<double>> & calcFFT(const PIVector<complex<double>> & in) override;
	const PIVector<complex<double>> & calcFFT(const PIVector<double> & in) override;
	const PIVector<complex<double>> & calcFFTinverse(const PIVector<complex<double>> & in) override;
	bool prepareForSize(size_t count) override;

private:
	PRIVATE_DECLARATION(PIP_FFTW_EXPORT)
};


template<>
class PIP_FFTW_EXPORT PIFFTW<ldouble>: public PIFFTBase<ldouble> {
public:
	const PIVector<complex<ldouble>> & calcFFT(const PIVector<complex<ldouble>> & in) override;
	const PIVector<complex<ldouble>> & calcFFT(const PIVector<ldouble> & in) override;
	const PIVector<complex<ldouble>> & calcFFTinverse(const PIVector<complex<ldouble>> & in) override;
	bool prepareForSize(size_t count) override;

private:
	PRIVATE_DECLARATION(PIP_FFTW_EXPORT)
};


//! \~english Single-precision FFTW wrapper.
//! \~russian Обертка FFTW одинарной точности.
typedef PIFFTW<float> PIFFTWf;

//! \~english Double-precision FFTW wrapper.
//! \~russian Обертка FFTW двойной точности.
typedef PIFFTW<double> PIFFTWd;

//! \~english Extended-precision FFTW wrapper.
//! \~russian Обертка FFTW расширенной точности.
typedef PIFFTW<ldouble> PIFFTWld;


#endif // PIP_HAS_FFT

#endif // PIFFT_H