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WavFile.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_WAVFILE_H
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#define SH_WAVFILE_H
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#include <vector>
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#include "
CvrStgFile.h
"
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class
BinaryIO
;
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class
WavChunkHeader
;
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class
WavChunkUnused
;
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class
WavFormatChunk
;
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class
WavFile
:
public
CvrStgFile
{
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public
:
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WavFile
(
void
) ;
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WavFile
(
BinaryIO
*io) ;
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~WavFile
(
void
) ;
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void
read
(
BinaryIO
*io) ;
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void
write
(
void
) ;
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std::list<CvrStgFile::Property>
getProperties
(
void
)
const
;
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unsigned
long
getNumSamples
(
void
)
const
;
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void
replaceSample
(
const
SamplePos
pos,
const
SampleValue
* s) ;
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SampleValue
*
getSampleValue
(
SamplePos
pos)
const
;
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std::vector<SampleValueAdjacencyList*>
calcSVAdjacencyLists
(
const
std::vector<SampleValue*>& svs)
const
;
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std::vector<MatchingAlgorithm*>
getMatchingAlgorithms
(
Graph
* g,
Matching
* m)
const
;
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unsigned
short
getBitsPerSample
(
void
)
const
;
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private
:
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static
const
signed
short
FormatPCM
= 1 ;
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static
const
unsigned
short
SamplesPerVertex
= 2 ;
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static
const
UWORD32
Radius_small
= 1 ;
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static
const
UWORD32
Radius_large
= 20 ;
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static
const
EmbValue
EmbValueModulus
= 2 ;
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WavChunkHeader
*
riffchhdr
;
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char
id_wave
[4] ;
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WavFormatChunk
*
FormatChunk
;
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WavChunkHeader
*
datachhdr
;
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std::vector<unsigned char>
data_small
;
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std::vector<int>
data_large
;
// it is assumed that an int can hold 32 bits
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std::vector<WavChunkUnused*>
UnusedBeforeData
;
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std::vector<BYTE>
UnusedAfterData
;
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void
readheaders
(
void
) ;
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void
readdata
(
void
) ;
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void
writeheaders
(
void
) ;
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void
writedata
(
void
) ;
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void
calcpos
(
SamplePos
n,
unsigned
long
*bytepos,
unsigned
short
*firstbitpos)
const
;
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unsigned
short
getFirstBitPosinSample
(
void
) ;
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unsigned
short
getBytesPerSample
(
void
) ;
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} ;
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#endif // ndef SH_WAVFILE_H
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