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libavcodec
dct.h
Go to the documentation of this file.
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/*
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* (I)DCT Transforms
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* Copyright (c) 2009 Peter Ross <pross@xvid.org>
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* Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
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* Copyright (c) 2010 Vitor Sessak
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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 St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_DCT_H
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#define AVCODEC_DCT_H
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#include <stdint.h>
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#include "
rdft.h
"
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struct
DCTContext
{
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int
nbits
;
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int
inverse
;
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RDFTContext
rdft
;
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const
float
*
costab
;
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FFTSample
*
csc2
;
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void
(*
dct_calc
)(
struct
DCTContext
*
s
,
FFTSample
*
data
);
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void
(*
dct32
)(
FFTSample
*
out
,
const
FFTSample
*
in
);
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};
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/**
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* Set up DCT.
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* @param nbits size of the input array:
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* (1 << nbits) for DCT-II, DCT-III and DST-I
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* (1 << nbits) + 1 for DCT-I
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*
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* @note the first element of the input of DST-I is ignored
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*/
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int
ff_dct_init
(
DCTContext
*
s
,
int
nbits
,
enum
DCTTransformType
type
);
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void
ff_dct_end
(
DCTContext
*
s
);
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void
ff_dct_init_x86
(
DCTContext
*
s
);
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void
ff_fdct_ifast
(int16_t *
data
);
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void
ff_fdct_ifast248
(int16_t *
data
);
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void
ff_jpeg_fdct_islow_8
(int16_t *
data
);
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void
ff_jpeg_fdct_islow_10
(int16_t *
data
);
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void
ff_fdct248_islow_8
(int16_t *
data
);
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void
ff_fdct248_islow_10
(int16_t *
data
);
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void
ff_j_rev_dct
(int16_t *
data
);
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void
ff_j_rev_dct4
(int16_t *
data
);
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void
ff_j_rev_dct2
(int16_t *
data
);
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void
ff_j_rev_dct1
(int16_t *
data
);
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void
ff_fdct_mmx
(int16_t *
block
);
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void
ff_fdct_mmxext
(int16_t *
block
);
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void
ff_fdct_sse2
(int16_t *
block
);
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#endif
/* AVCODEC_DCT_H */
Generated on Sun Mar 23 2014 23:49:53 for FFmpeg by
1.8.2