org.quark.stegnos.BitBuffer Class Reference

Public Member Functions
	BitBuffer (int[] carrierData, int skipBytes, int carrierMask)
	BitBuffer (int[] bdnData, int bdnMask, int[] mdData, int mdMask)
boolean	isEmpty ()
int	getNext ()
int	getNext (int nbrBits)
int	nbrBitsSet (int mask)

Detailed Description

This class encapsulates an integer array and enables the data to be read one or more bits at a time. The masks are used to indicate which bits from the data are to be returned.

Author

Peter Lager

Constructor & Destructor Documentation

org.quark.stegnos.BitBuffer.BitBuffer	(	int[]	carrierData,
		int	skipBytes,
		int	carrierMask
	)

Use this for reading the CARRIER data
A BitBuffer created using this constructor is suitable for reading encrypted burden data from the carrier.

Parameters

carrierData
skipBytes	the elements used by the header of bytes to s
carrierMask

org.quark.stegnos.BitBuffer.BitBuffer	(	int[]	bdnData,
		int	bdnMask,
		int[]	mdData,
		int	mdMask
	)

Use this for reading the BURDEN data
A BitBuffer created using this constructor is suitable for reading encrypted burden data when embedding into a steganograph.

Parameters

bdnData	the burden data
bdnMask	the burden mask
mdData	the meta data
mdMask	the meta data mask

Member Function Documentation

int org.quark.stegnos.BitBuffer.getNext

(

)

Get the next bit

int org.quark.stegnos.BitBuffer.getNext

(

int

nbrBits

)

Get a number of bits and pass back as LSB in an integer.

Parameters

nbrBits

>0

boolean org.quark.stegnos.BitBuffer.isEmpty

(

)

Has all the bits been read?

Returns

true if all the available bits in the buffer have been read

int org.quark.stegnos.BitBuffer.nbrBitsSet

(

int

mask

)

Calculate the number of bits set in a mask.

Parameters

mask

Returns

number of '1' / set bits

---

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

• /Users/peter/git/steganography-repos/Stenography/src/org/quark/stegnos/BitBuffer.java