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0.5.1
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src
JpegSampleValue.h
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/*
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* steghide 0.5.1 - a steganography program
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* Copyright (C) 1999-2003 Stefan Hetzl <shetzl@chello.at>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#ifndef SH_JPEGSAMPLE_H
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#define SH_JPEGSAMPLE_H
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#include "
SampleValue.h
"
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class
JpegSampleValue
:
public
SampleValue
{
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public
:
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JpegSampleValue
(
int
c) ;
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SampleValue
*
getNearestTargetSampleValue
(
EmbValue
t)
const
;
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UWORD32
calcDistance
(
const
SampleValue
*s)
const
;
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std::string
getName
(
void
)
const
;
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SWORD16
getDctCoeff
(
void
)
const
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{
return
DctCoeff
; } ;
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static
EmbValue
calcEValue
(
SWORD16
dctc)
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{
return
(((dctc >= 0) ? dctc : -dctc) % 2) ; } ;
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private
:
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SWORD16
DctCoeff
;
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} ;
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#endif // ndef SH_JPEGSAMPLE_H
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