cvrstgfile(3)
NAME
CvrStgFile - a cover-/stego-file
SYNOPSIS
#include <CvrStgFile.h> Inherits CvrStgObject. Inherited by AuFile, BmpFile, DummyFile, and WavFile. Public Member Functions CvrStgFile (void) virtual ~CvrStgFile (void) virtual void read (BinaryIO *io) virtual void write (void) void transform (const std::string &fn) virtual std::list< Property > getProperties (void) const=0 virtual std::vector< SampleValueAdjacencyList * > calcSVAdjacencyLists (const std::vector< SampleValue * > &svs) const virtual std::vector< MatchingAlgorithm * > getMatchingAlgorithms (Graph *g, Matching *m) const const std::string & getName (void) const bool is_std (void) const unsigned long getCapacity (void) const std::string getHRCapacity (void) const unsigned short getSamplesPerVertex (void) const UWORD32 getRadius (void) const EmbValue getEmbValueModulus (void) const virtual EmbValue getEmbeddedValue (const SamplePos pos) const Static Public Member Functions static CvrStgFile * readFile (const std::string &fn) Protected Member Functions void setSamplesPerVertex (unsigned short spv) void setRadius (UWORD32 r) void setEmbValueModulus (EmbValue m) void setBinIO (BinaryIO *io) BinaryIO * getBinIO (void) const Private Types enum FILEFORMAT { UNKNOWN, BMP, WAV, AU, JPEG } Static Private Member Functions static FILEFORMAT guessff (BinaryIO *io) Private Attributes BinaryIO * BinIO unsigned short SamplesPerVertex UWORD32 Radius EmbValue EmbValueModulus Classes class Property
Detailed Description
file-format specific constants are handled as follows: CvrStgFile
contains a protected set-function (e.g. setSamplesPerVertex), a public
get-function (e.g. getSamplesPerVertex() const) and a private variable.
The public get function does nothing else than returning the private
variable, which must be set as soon as possible (if it is not set, it
will contain a null value set in CvrStgFile::CvrStgFile).
Member Enumeration Documentation
- enum CvrStgFile::FILEFORMAT [private]
- Enumerator:
- UNKNOWN
- BMP
- WAV
- AU
- JPEG
Constructor & Destructor Documentation
CvrStgFile::CvrStgFile (void) CvrStgFile::~CvrStgFile (void) [virtual]
Member Function Documentation
- CvrStgFile * CvrStgFile::readFile (const std::string & fn) [static]
- this function reads the file with name fn and returns a *File object of the correct type casted to CvrStgFile.
- void CvrStgFile::read (BinaryIO * io) [virtual]
- Reimplemented in AuFile, BmpFile, and WavFile.
- void CvrStgFile::write (void) [virtual]
- Reimplemented in AuFile, BmpFile, and WavFile.
- void CvrStgFile::transform (const std::string & fn) virtual std::list<Property> CvrStgFile::getProperties (void) const [pure
- virtual]
Implemented in AuFile, BmpFile, WavFile, and DummyFile. - std::vector< SampleValueAdjacencyList * > CvrStgFile::calcSVAdjacencyLists
- (const std::vector< SampleValue * > & svs) const [virtual] calculate a vector a SampleValueAdjacencyLists
- Parameters:
svs a vector of unique(!) sample values where svs[i]->getLabel() == i holds for all i
- Returns:
a vector of SampleValueAdjacencyLists where retval[i] only contains sample values with getEmbValue() == i
- Every row in the adjacency lists must be sorted in the following order:
The first sample value has the least distance to the source sample
value, the last has the largest distance. If two sample values in one
row have the same distance to the source sample value, the order does
not matter. - May be overridden in derived class to provide a faster version.
- Reimplemented in BmpFile, and WavFile.
- std::vector< MatchingAlgorithm * > CvrStgFile::getMatchingAlgorithms (Graph
- * g, Matching * m) const [virtual] get recommended list of matching algorithms
- Parameters:
m an empty matching - will be used in construction of
MatchingAlgorithm objects - The MatchingAlgorithm objects returned by this function should be deleted by the caller if they are no longer needed.
- Reimplemented in AuFile, BmpFile, and WavFile.
- const std::string& CvrStgFile::getName (void) const [inline]
- get the name of this cvrstgfile
- bool CvrStgFile::is_std (void) const [inline] unsigned long CvrStgFile::getCapacity (void) const
- get the capacity of this cvrstgfile
- Returns:
the capacity in bytes
- std::string CvrStgFile::getHRCapacity (void) const
- get the capacity as a human-readable string
- unsigned short CvrStgFile::getSamplesPerVertex (void) const [inline]
- get the number of samples per vertex (this is a file-format specific
constant) - UWORD32 CvrStgFile::getRadius (void) const [inline]
- get the neighbourhood radius (this is a file-format specific constant)
- EmbValue CvrStgFile::getEmbValueModulus (void) const [inline]
- values that are embedded in samples will be in 0...Modulus-1 (this is a file-format specific constant)
- EmbValue CvrStgFile::getEmbeddedValue (const SamplePos pos) const [virtual]
- get the value that is embedded in the Sample pos
- Parameters:
pos the position of the sample
- Returns:
the value that is embedded in the sample at the given sample
position - This is equivalent to getSample(pos)->getEmbeddedValue() and is implemented here like this.
- May be overwritten by derived class to provide a faster version.
- void CvrStgFile::setSamplesPerVertex (unsigned short spv) [inline,
- protected]
- void CvrStgFile::setRadius (UWORD32 r) [protected]
- set Radius to r unless Args.Radius is set (set Radius to
Args.Radius.getValue() then) - void CvrStgFile::setEmbValueModulus (EmbValue m) [inline, protected] void CvrStgFile::setBinIO (BinaryIO * io) [inline, protected] BinaryIO* CvrStgFile::getBinIO (void) const [inline, protected] CvrStgFile::FILEFORMAT CvrStgFile::guessff (BinaryIO * io) [static,
- private]
guesses the file format by looking at the first few bytes
Member Data Documentation
- BinaryIO* CvrStgFile::BinIO [private] unsigned short CvrStgFile::SamplesPerVertex [private]
- Reimplemented in AuFile, WavFile, and DummyFile.
- UWORD32 CvrStgFile::Radius [private] EmbValue CvrStgFile::EmbValueModulus [private]
- Reimplemented in AuFile, WavFile, and DummyFile.
Author
- Generated automatically by Doxygen for steghide from the source code.