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060e4a9e06
The typedefs also exist in the avfft.h header and since typedefs cannot be legally redefined in C, the code fails to compile with some compilers. This reverts commits11c7155cceand57f1b1dcc7.
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/*
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* (I)RDFT transforms
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* Copyright (c) 2009 Alex Converse <alex dot converse at gmail dot com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_RDFT_H
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#define AVCODEC_RDFT_H
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#include "config.h"
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#include "fft.h"
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#if CONFIG_HARDCODED_TABLES
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# define SINTABLE_CONST const
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#else
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# define SINTABLE_CONST
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#endif
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#define SINTABLE(size) \
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SINTABLE_CONST DECLARE_ALIGNED(16, FFTSample, ff_sin_##size)[size/2]
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extern SINTABLE(16);
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extern SINTABLE(32);
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extern SINTABLE(64);
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extern SINTABLE(128);
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extern SINTABLE(256);
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extern SINTABLE(512);
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extern SINTABLE(1024);
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extern SINTABLE(2048);
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extern SINTABLE(4096);
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extern SINTABLE(8192);
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extern SINTABLE(16384);
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extern SINTABLE(32768);
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extern SINTABLE(65536);
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struct RDFTContext {
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int nbits;
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int inverse;
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int sign_convention;
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/* pre/post rotation tables */
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const FFTSample *tcos;
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SINTABLE_CONST FFTSample *tsin;
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FFTContext fft;
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void (*rdft_calc)(struct RDFTContext *s, FFTSample *z);
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};
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/**
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* Set up a real FFT.
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* @param nbits log2 of the length of the input array
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* @param trans the type of transform
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*/
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int ff_rdft_init(RDFTContext *s, int nbits, enum RDFTransformType trans);
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void ff_rdft_end(RDFTContext *s);
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void ff_rdft_init_arm(RDFTContext *s);
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#endif /* AVCODEC_RDFT_H */
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