CEncoder Class Reference

PGF encoder class. More...

#include <Encoder.h>

Public Member Functions
	CEncoder (CPGFStream stream, PGFPreHeader preHeader, PGFHeader header, const PGFPostHeader &postHeader, UINT32 &levelLength) THROW_
	~CEncoder ()
UINT32	Flush () THROW_
void	Partition (CSubband *band, int width, int height, int startPos, int pitch) THROW_
void	SetLevelIsEncoded (bool b)
void	WriteValue (CSubband *band, int bandPos) THROW_
Protected Attributes
UINT32	m_codeBuffer [BufferSize]
UINT32	m_codePos
int	m_currLevelIndex
UINT64	m_currPosition
bool	m_isLevelEncoded
UINT32 *	m_levelLength
UINT64	m_levelLengthPos
UINT32	m_maxAbsValue
UINT32	m_sigFlagVector [BufferLen]
UINT64	m_startPosition
CPGFStream *	m_stream
DataT	m_value [BufferSize]
UINT32	m_valuePos

Detailed Description

PGF encoder class.

Author:: C. Stamm, R. Spuler

Definition at line 40 of file Encoder.h.

Constructor & Destructor Documentation

CEncoder::CEncoder	(	CPGFStream *	stream,
		PGFPreHeader	preHeader,
		PGFHeader	header,
		const PGFPostHeader &	postHeader,
		UINT32 *&	levelLength
	)

Write pre-header, header, postHeader, and levelLength.

It might throw an IOException.

Parameters:

	stream	A PGF stream
	preHeader	A already filled in PGF pre header
	header	An already filled in PGF header
	postHeader	[in] A already filled in PGF post header (containing color table, user data, ...)
	levelLength	A reference to an integer array, large enough to save the relative file positions of all PGF levels

Definition at line 61 of file Encoder.cpp.

CEncoder::~CEncoder ( )

Destructor.

Definition at line 121 of file Encoder.cpp.

Member Function Documentation

UINT32 CEncoder::Flush ( )

Pad buffer with zeros, encode buffer, write levelLength into header Return number of bytes written into stream It might throw an IOException.

Definition at line 200 of file Encoder.cpp.

void CEncoder::Partition	(	CSubband *	band,
		int	width,
		int	height,
		int	startPos,
		int	pitch
	)

Partitions a rectangular region of a given subband.

Partitioning scheme: The plane is partitioned in squares of side length LinBlockSize. Write wavelet coefficients into buffer. It might throw an IOException.

Parameters:

	band	A subband
	width	The width of the rectangle
	height	The height of the rectangle
	startPos	The buffer position of the top left corner of the rectangular region
	pitch	The number of bytes in row of the subband