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libavcodec
imdct15.h
Go to the documentation of this file.
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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