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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 "
fft.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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int
*
pfa_prereindex
;
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int
*
pfa_postreindex
;
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FFTContext
ptwo_fft
;
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FFTComplex
*
tmp
;
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FFTComplex
*
twiddle_exptab
;
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/* 0 - 18: fft15 twiddles, 19 - 20: fft5 twiddles */
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FFTComplex
exptab
[21];
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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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#endif
/* AVCODEC_IMDCT15_H */
s
const char * s
Definition:
avisynth_c.h:768
IMDCT15Context::fft_n
int fft_n
Definition:
imdct15.h:27
src
#define src
Definition:
vp8dsp.c:254
IMDCT15Context::ptwo_fft
FFTContext ptwo_fft
Definition:
imdct15.h:33
IMDCT15Context::tmp
FFTComplex * tmp
Definition:
imdct15.h:35
ff_imdct15_uninit
void ff_imdct15_uninit(IMDCT15Context **s)
Free an iMDCT.
Definition:
imdct15.c:47
N
#define N
Definition:
vf_pp7.c:73
IMDCT15Context::twiddle_exptab
FFTComplex * twiddle_exptab
Definition:
imdct15.h:37
FFTContext
Definition:
fft.h:88
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
IMDCT15Context::pfa_prereindex
int * pfa_prereindex
Definition:
imdct15.h:30
IMDCT15Context::exptab
FFTComplex exptab[21]
Definition:
imdct15.h:40
IMDCT15Context
Definition:
imdct15.h:26
FFTComplex
Definition:
avfft.h:37
IMDCT15Context::imdct_half
void(* imdct_half)(struct IMDCT15Context *s, float *dst, const float *src, ptrdiff_t src_stride, float scale)
Calculate the middle half of the iMDCT.
Definition:
imdct15.h:45
ff_imdct15_init
int ff_imdct15_init(IMDCT15Context **s, int N)
Init an iMDCT of the length 2 * 15 * (2^N)
Definition:
imdct15.c:98
IMDCT15Context::pfa_postreindex
int * pfa_postreindex
Definition:
imdct15.h:31
IMDCT15Context::len4
int len4
Definition:
imdct15.h:29
fft.h
IMDCT15Context::len2
int len2
Definition:
imdct15.h:28
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