steghide 0.5.1
AuFile.h
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1/*
2 * steghide 0.5.1 - a steganography program
3 * Copyright (C) 1999-2003 Stefan Hetzl <shetzl@chello.at>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 *
19 */
20
21#ifndef SH_AUFILE_H
22#define SH_AUFILE_H
23
24#include <vector>
25
26#include "AudioData.h"
27#include "CvrStgFile.h"
28
29class BinaryIO ;
30
35class AuFile : public CvrStgFile {
36 public:
37 AuFile (BinaryIO *io) ;
38 ~AuFile (void) ;
39
40 void read (BinaryIO *io) ;
41 void write (void) ;
42
43 std::list<CvrStgFile::Property> getProperties (void) const ;
44 std::vector<MatchingAlgorithm*> getMatchingAlgorithms (Graph* g, Matching* m) const ;
45
46 unsigned long getNumSamples (void) const
47 { return Data->getNumSamples() ; } ;
48
49 void replaceSample (const SamplePos pos, const SampleValue* s)
50 { return Data->replaceSample(pos, s) ; } ;
51
53 { return Data->getSampleValue(pos) ; } ;
54
55 private:
56 enum ENCODING { MULAW8 = 1, PCM8 = 2, PCM16 = 3 } ;
57 class AuHeader {
58 public:
59 char id[4] ;
65
66 static const UWORD32 SizeUnknown = 0xFFFFFFFF ;
67 static const unsigned short HeaderSize = 24 ;
68
69 unsigned short getBytesPerSample (void) const ;
70 } ;
71
72 static const UWORD32 Radius_MuLaw8 = 1 ;
73 static const UWORD32 Radius_PCM8 = 1 ;
74 static const UWORD32 Radius_PCM16 = 20 ;
75 static const unsigned short SamplesPerVertex = 2 ;
76 static const EmbValue EmbValueModulus = 2 ;
77
79 std::vector<BYTE> Infofield ;
81} ;
82
83#endif /* ndef SH_AUFILE_H */
Definition AuFile.h:57
UWORD32 offset
Definition AuFile.h:60
unsigned short getBytesPerSample(void) const
Definition AuFile.cc:201
ENCODING encoding
Definition AuFile.h:62
UWORD32 channels
Definition AuFile.h:64
static const UWORD32 SizeUnknown
Definition AuFile.h:66
UWORD32 samplerate
Definition AuFile.h:63
static const unsigned short HeaderSize
Definition AuFile.h:67
UWORD32 size
Definition AuFile.h:61
a CvrStgFile in Sun .au format
Definition AuFile.h:35
SampleValue * getSampleValue(SamplePos pos) const
Definition AuFile.h:52
void read(BinaryIO *io)
Definition AuFile.cc:49
void replaceSample(const SamplePos pos, const SampleValue *s)
Definition AuFile.h:49
static const unsigned short SamplesPerVertex
Definition AuFile.h:75
static const UWORD32 Radius_PCM8
Definition AuFile.h:73
ENCODING
Definition AuFile.h:56
@ PCM16
Definition AuFile.h:56
@ PCM8
Definition AuFile.h:56
@ MULAW8
Definition AuFile.h:56
void write(void)
Definition AuFile.cc:140
unsigned long getNumSamples(void) const
Definition AuFile.h:46
AuHeader Header
Definition AuFile.h:78
AudioData * Data
Definition AuFile.h:80
~AuFile(void)
Definition AuFile.cc:44
static const UWORD32 Radius_PCM16
Definition AuFile.h:74
static const EmbValue EmbValueModulus
Definition AuFile.h:76
std::list< CvrStgFile::Property > getProperties(void) const
Definition AuFile.cc:180
std::vector< BYTE > Infofield
Definition AuFile.h:79
std::vector< MatchingAlgorithm * > getMatchingAlgorithms(Graph *g, Matching *m) const
Definition AuFile.cc:224
static const UWORD32 Radius_MuLaw8
Definition AuFile.h:72
interface definition for AudioData objects.
Definition AudioData.h:37
provides methods for file i/o as needed by the rest of steghide
Definition BinaryIO.h:33
a cover-/stego-file
Definition CvrStgFile.h:46
virtual void replaceSample(const SamplePos pos, const SampleValue *s)=0
virtual SampleValue * getSampleValue(const SamplePos pos) const =0
virtual unsigned long getNumSamples(void) const =0
a graph constructed from a cover file and a message to be embedded
Definition Graph.h:51
represent a matching on a graph
Definition Matching.h:41
the value of a sample in a CvrStgFile
Definition SampleValue.h:61
UWORD32 SamplePos
Definition common.h:67
unsigned long UWORD32
Definition common.h:45
BYTE EmbValue
Definition common.h:66