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58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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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_IMDCT15_H
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#define AVCODEC_IMDCT15_H
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#include <stddef.h>
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#include "avfft.h"
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typedef struct IMDCT15Context {
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int fft_n;
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int len2;
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int len4;
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FFTComplex *tmp;
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FFTComplex *twiddle_exptab;
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FFTComplex *exptab[6];
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/**
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* Calculate the middle half of the iMDCT
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*/
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void (*imdct_half)(struct IMDCT15Context *s, float *dst, const float *src,
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ptrdiff_t src_stride, float scale);
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} IMDCT15Context;
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/**
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* Init an iMDCT of the length 2 * 15 * (2^N)
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*/
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int ff_imdct15_init(IMDCT15Context **s, int N);
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/**
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* Free an iMDCT.
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*/
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void ff_imdct15_uninit(IMDCT15Context **s);
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void ff_imdct15_init_aarch64(IMDCT15Context *s);
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#endif /* AVCODEC_IMDCT15_H */
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