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111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/*
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This file is part of FFTS.
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Copyright (c) 2012, Anthony M. Blake
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the organization nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL ANTHONY M. BLAKE BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FFTS_H
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#define FFTS_H
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#if defined (_MSC_VER) && (_MSC_VER >= 1020)
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#pragma once
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#endif
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if (defined(_WIN32) || defined(WIN32)) && defined(FFTS_SHARED)
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# ifdef FFTS_BUILD
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# define FFTS_API __declspec(dllexport)
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# else
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# define FFTS_API __declspec(dllimport)
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# endif
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#else
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# if (__GNUC__ >= 4) || defined(HAVE_GCC_VISIBILITY)
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# define FFTS_API __attribute__ ((visibility("default")))
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# else
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# define FFTS_API
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# endif
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#endif
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/* The direction of the transform
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(i.e, the sign of the exponent in the transform.)
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*/
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#define FFTS_FORWARD (-1)
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#define FFTS_BACKWARD (+1)
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struct _ffts_plan_t;
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typedef struct _ffts_plan_t ffts_plan_t;
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/* Complex data is stored in the interleaved format
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(i.e, the real and imaginary parts composing each
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element of complex data are stored adjacently in memory)
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The multi-dimensional arrays passed are expected to be
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stored as a single contiguous block in row-major order
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*/
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FFTS_API ffts_plan_t*
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ffts_init_1d(size_t N, int sign);
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FFTS_API ffts_plan_t*
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ffts_init_2d(size_t N1, size_t N2, int sign);
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FFTS_API ffts_plan_t*
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ffts_init_nd(int rank, size_t *Ns, int sign);
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/* For real transforms, sign == FFTS_FORWARD implies a real-to-complex
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forwards tranform, and sign == FFTS_BACKWARD implies a complex-to-real
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backwards transform.
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The output of a real-to-complex transform is N/2+1 complex numbers,
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where the redundant outputs have been omitted.
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*/
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FFTS_API ffts_plan_t*
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ffts_init_1d_real(size_t N, int sign);
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FFTS_API ffts_plan_t*
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ffts_init_2d_real(size_t N1, size_t N2, int sign);
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FFTS_API ffts_plan_t*
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ffts_init_nd_real(int rank, size_t *Ns, int sign);
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FFTS_API void
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ffts_execute(ffts_plan_t *p, const void *input, void *output);
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FFTS_API void
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ffts_free(ffts_plan_t *p);
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#ifdef __cplusplus
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}
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#endif
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#endif /* FFTS_H */
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