50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/*
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* This file is part of pocketfft.
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* Licensed under a 3-clause BSD style license - see LICENSE.md
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*/
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/*! \file pocketfft.h
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* Public interface of the pocketfft library
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*
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* Copyright (C) 2008-2019 Max-Planck-Society
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* \author Martin Reinecke
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*/
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#ifndef POCKETFFT_H
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#define POCKETFFT_H
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#include <stdlib.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct pocketfft_plan_c_i;
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typedef struct pocketfft_plan_c_i * pocketfft_plan_c;
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pocketfft_plan_c pocketfft_make_plan_c (size_t length);
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void pocketfft_delete_plan_c (pocketfft_plan_c plan);
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int pocketfft_backward_c(pocketfft_plan_c plan, double c[], double fct);
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int pocketfft_forward_c(pocketfft_plan_c plan, double c[], double fct);
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size_t pocketfft_length_c(pocketfft_plan_c plan);
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struct pocketfft_plan_r_i;
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typedef struct pocketfft_plan_r_i * pocketfft_plan_r;
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pocketfft_plan_r pocketfft_make_plan_r (size_t length);
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void pocketfft_delete_plan_r (pocketfft_plan_r plan);
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/*! Computes a real backward FFT on \a c, using \a plan
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and assuming the FFTPACK storage scheme:
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- on entry, \a c has the form <tt>r0, r1, i1, r2, i2, ...</tt>
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- on exit, it has the form <tt>r0, r1, ..., r[length-1]</tt>. */
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int pocketfft_backward_r(pocketfft_plan_r plan, double c[], double fct);
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/*! Computes a real forward FFT on \a c, using \a plan
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and assuming the FFTPACK storage scheme:
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- on entry, \a c has the form <tt>r0, r1, ..., r[length-1]</tt>;
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- on exit, it has the form <tt>r0, r1, i1, r2, i2, ...</tt> */
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int pocketfft_forward_r(pocketfft_plan_r plan, double c[], double fct);
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size_t pocketfft_length_r(pocketfft_plan_r plan);
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#ifdef __cplusplus
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}
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#endif
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#endif
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