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/*
* This file is part of Libav.
*
* Libav 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 2.1 of the License, or (at your option) any later version.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_OPUS_IMDCT_H
#define AVCODEC_OPUS_IMDCT_H
#include <stddef.h>
#include "avfft.h"
typedef struct CeltIMDCTContext {
int fft_n;
int len2;
int len4;
FFTComplex *tmp;
FFTComplex *twiddle_exptab;
FFTComplex *exptab[6];
/**
* Calculate the middle half of the iMDCT
*/
void (*imdct_half)(struct CeltIMDCTContext *s, float *dst, const float *src,
ptrdiff_t src_stride, float scale);
} CeltIMDCTContext;
/**
* Init an iMDCT of the length 2 * 15 * (2^N)
*/
int ff_celt_imdct_init(CeltIMDCTContext **s, int N);
/**
* Free an iMDCT.
*/
void ff_celt_imdct_uninit(CeltIMDCTContext **s);
void ff_celt_imdct_init_aarch64(CeltIMDCTContext *s);
#endif /* AVCODEC_OPUS_IMDCT_H */
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