steghide 0.5.1
JpegSampleValue Class Reference

#include <JpegSampleValue.h>

Inheritance diagram for JpegSampleValue:
SampleValue

Public Member Functions

 JpegSampleValue (int c)
SampleValuegetNearestTargetSampleValue (EmbValue t) const
UWORD32 calcDistance (const SampleValue *s) const
std::string getName (void) const
SWORD16 getDctCoeff (void) const
Public Member Functions inherited from SampleValue
 SampleValue (void)
virtual ~SampleValue (void)
virtual bool isNeighbour (const SampleValue *s) const
EmbValue getEmbeddedValue (void) const
UWORD32 getKey (void) const
bool operator== (const SampleValue &sv) const
bool operator!= (const SampleValue &sv) const
bool operator< (const SampleValue &sv) const
UWORD32 getNumEdges (EmbValue t) const
void setNumEdges (EmbValue t, UWORD32 ne)
void incNumEdges (EmbValue t)
void decNumEdges (EmbValue t)
void setLabel (unsigned long l)
unsigned long getLabel (void) const
void print (unsigned short spc=0) const

Static Public Member Functions

static EmbValue calcEValue (SWORD16 dctc)

Private Attributes

SWORD16 DctCoeff

Additional Inherited Members

Protected Attributes inherited from SampleValue
EmbValue EValue
 the bit that is embedded in this sample value - must be set in constructor of derived class
UWORD32 Key
 the key of this sample value - must be different for two different sample values - must be set in constructor of derived class

Constructor & Destructor Documentation

◆ JpegSampleValue()

JpegSampleValue::JpegSampleValue ( int c)

Member Function Documentation

◆ calcDistance()

UWORD32 JpegSampleValue::calcDistance ( const SampleValue * s) const
virtual

calculate the distance between the sample value s and this sample value

Parameters
sa sample value of the same type as this
Returns
the distance

Implements SampleValue.

◆ calcEValue()

EmbValue JpegSampleValue::calcEValue ( SWORD16 dctc)
inlinestatic

◆ getDctCoeff()

SWORD16 JpegSampleValue::getDctCoeff ( void ) const
inline

◆ getName()

std::string JpegSampleValue::getName ( void ) const
virtual

return a short name uniquely identifying this sample value

Implements SampleValue.

◆ getNearestTargetSampleValue()

SampleValue * JpegSampleValue::getNearestTargetSampleValue ( EmbValue t) const
virtual

get the nearest (with the least distance to this sample value) sample value whose embedded value equals the specified target

Parameters
tthe target embedded value

If two or more target sample values have equal distance each of them should be returned with equal probability.

The returned SampleValue object should be deleted by the callser.

Implements SampleValue.

Member Data Documentation

◆ DctCoeff

SWORD16 JpegSampleValue::DctCoeff
private

The documentation for this class was generated from the following files: