steghide 0.5.1
WavFile.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_WAVFILE_H
22#define SH_WAVFILE_H
23
24#include <vector>
25
26#include "CvrStgFile.h"
27
28class BinaryIO ;
29class WavChunkHeader ;
30class WavChunkUnused ;
31class WavFormatChunk ;
32
33class WavFile : public CvrStgFile {
34 public:
35 WavFile (void) ;
36 WavFile (BinaryIO *io) ;
37 ~WavFile (void) ;
38
39 void read (BinaryIO *io) ;
40 void write (void) ;
41
42 std::list<CvrStgFile::Property> getProperties (void) const ;
43
44 unsigned long getNumSamples (void) const ;
45 void replaceSample (const SamplePos pos, const SampleValue* s) ;
47
48 std::vector<SampleValueAdjacencyList*> calcSVAdjacencyLists (const std::vector<SampleValue*>& svs) const ;
49 std::vector<MatchingAlgorithm*> getMatchingAlgorithms (Graph* g, Matching* m) const ;
50
51 unsigned short getBitsPerSample (void) const ;
52
53 private:
54 static const signed short FormatPCM = 1 ;
55
56 static const unsigned short SamplesPerVertex = 2 ;
57 static const UWORD32 Radius_small = 1 ;
58 static const UWORD32 Radius_large = 20 ;
59 static const EmbValue EmbValueModulus = 2 ;
60
62 char id_wave[4] ;
63
65
68 std::vector<unsigned char> data_small ;
70 std::vector<int> data_large ; // it is assumed that an int can hold 32 bits
71
72 std::vector<WavChunkUnused*> UnusedBeforeData ;
73 std::vector<BYTE> UnusedAfterData ;
74
75 void readheaders (void) ;
76 void readdata (void) ;
77 void writeheaders (void) ;
78 void writedata (void) ;
79 void calcpos (SamplePos n, unsigned long *bytepos, unsigned short *firstbitpos) const ;
84 unsigned short getFirstBitPosinSample (void) ;
85 unsigned short getBytesPerSample (void) ;
86} ;
87
88#endif // ndef SH_WAVFILE_H
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
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
Definition WavChunkHeader.h:28
Definition WavChunkUnused.h:30
Definition WavFile.h:33
static const EmbValue EmbValueModulus
Definition WavFile.h:59
std::vector< int > data_large
this std::vector contains the wav data if BitsPerSample >8
Definition WavFile.h:70
static const unsigned short SamplesPerVertex
Definition WavFile.h:56
static const UWORD32 Radius_small
Definition WavFile.h:57
unsigned long getNumSamples(void) const
Definition WavFile.cc:94
void writeheaders(void)
Definition WavFile.cc:374
void read(BinaryIO *io)
Definition WavFile.cc:56
void writedata(void)
Definition WavFile.cc:267
WavFile(void)
WavChunkHeader * datachhdr
Definition WavFile.h:66
unsigned short getFirstBitPosinSample(void)
Definition WavFile.cc:188
SampleValue * getSampleValue(SamplePos pos) const
Definition WavFile.cc:118
std::vector< SampleValueAdjacencyList * > calcSVAdjacencyLists(const std::vector< SampleValue * > &svs) const
Definition WavFile.cc:130
std::vector< BYTE > UnusedAfterData
Definition WavFile.h:73
void readdata(void)
Definition WavFile.cc:201
static const signed short FormatPCM
Definition WavFile.h:54
unsigned short getBytesPerSample(void)
Definition WavFile.cc:176
char id_wave[4]
Definition WavFile.h:62
std::vector< MatchingAlgorithm * > getMatchingAlgorithms(Graph *g, Matching *m) const
Definition WavFile.cc:86
WavFormatChunk * FormatChunk
Definition WavFile.h:64
std::list< CvrStgFile::Property > getProperties(void) const
Definition WavFile.cc:72
~WavFile(void)
Definition WavFile.cc:46
void readheaders(void)
Definition WavFile.cc:313
std::vector< unsigned char > data_small
this std::vector contains the wav data if BitsPerSample <= 8
Definition WavFile.h:68
void calcpos(SamplePos n, unsigned long *bytepos, unsigned short *firstbitpos) const
void write(void)
Definition WavFile.cc:64
unsigned short getBitsPerSample(void) const
Definition WavFile.cc:171
void replaceSample(const SamplePos pos, const SampleValue *s)
Definition WavFile.cc:106
WavChunkHeader * riffchhdr
Definition WavFile.h:61
static const UWORD32 Radius_large
Definition WavFile.h:58
std::vector< WavChunkUnused * > UnusedBeforeData
Definition WavFile.h:72
Definition WavFormatChunk.h:29
UWORD32 SamplePos
Definition common.h:67
unsigned long UWORD32
Definition common.h:45
BYTE EmbValue
Definition common.h:66