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 
29 class BinaryIO ;
30 
35 class 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 */