CSubband Class Reference

Wavelet channel class. More...

#include <Subband.h>

Public Member Functions
	CSubband ()
	Standard constructor.
	~CSubband ()
	Destructor.
bool	AllocMemory ()
void	FreeMemory ()
	Delete the memory buffer of this subband.
void	ExtractTile (CEncoder &encoder, bool tile=false, UINT32 tileX=0, UINT32 tileY=0) THROW_
void	PlaceTile (CDecoder &decoder, int quantParam, bool tile=false, UINT32 tileX=0, UINT32 tileY=0) THROW_
void	Quantize (int quantParam)
void	Dequantize (int quantParam)
void	SetData (UINT32 pos, DataT v)
DataT *	GetBuffer ()
DataT	GetData (UINT32 pos) const
int	GetLevel () const
int	GetHeight () const
int	GetWidth () const
Orientation	GetOrientation () const
void	IncBuffRow (UINT32 pos)

Friends
class	CWaveletTransform

Detailed Description

Wavelet channel class.

PGF wavelet channel subband class.

Author

C. Stamm, R. Spuler

Member Function Documentation

bool CSubband::AllocMemory

(

)

Allocate a memory buffer to store all wavelet coefficients of this subband.

Returns

True if the allocation did work without any problems

void CSubband::Dequantize

(

int

quantParam

)

Perform subband dequantization with given quantization parameter. A scalar quantization (with dead-zone) is used. A large quantization value results in strong quantization and therefore in big quality loss.

Parameters

quantParam

A quantization parameter (larger or equal to 0)

void CSubband::ExtractTile	(	CEncoder &	encoder,
		bool	tile = false,
		UINT32	tileX = 0,
		UINT32	tileY = 0
	)

Extracts a rectangular subregion of this subband. Write wavelet coefficients into buffer. It might throw an IOException.

Parameters

encoder	An encoder instance
tile	True if just a rectangular region is extracted, false if the entire subband is extracted.
tileX	Tile index in x-direction
tileY	Tile index in y-direction

DataT* CSubband::GetBuffer ( )

inline

Get a pointer to an array of all wavelet coefficients of this subband.

Returns

Pointer to array of wavelet coefficients

DataT CSubband::GetData ( UINT32  pos ) const

inline

Return wavelet coefficient at given position.

Parameters

pos	A subband position (>= 0)

Returns

Wavelet coefficient

int CSubband::GetHeight ( ) const

inline

Return height of this subband.

Returns

Height of this subband (in pixels)

int CSubband::GetLevel ( ) const

inline

Return level of this subband.

Returns

Level of this subband

Orientation CSubband::GetOrientation ( ) const

inline

Return orientation of this subband. LL LH HL HH

Returns

Orientation of this subband (LL, HL, LH, HH)

int CSubband::GetWidth ( ) const

inline

Return width of this subband.

Returns

Width of this subband (in pixels)

void CSubband::IncBuffRow ( UINT32  pos )

inline

Set data buffer position to given position + one row.

Parameters

pos	Given position

void CSubband::PlaceTile	(	CDecoder &	decoder,
		int	quantParam,
		bool	tile = false,
		UINT32	tileX = 0,
		UINT32	tileY = 0
	)

Decoding and dequantization of this subband. It might throw an IOException.

Parameters

decoder	A decoder instance
quantParam	Dequantization value
tile	True if just a rectangular region is placed, false if the entire subband is placed.
tileX	Tile index in x-direction
tileY	Tile index in y-direction

void CSubband::Quantize

(

int

quantParam

)

Perform subband quantization with given quantization parameter. A scalar quantization (with dead-zone) is used. A large quantization value results in strong quantization and therefore in big quality loss.

Parameters

quantParam

A quantization parameter (larger or equal to 0)

void CSubband::SetData ( UINT32  pos, DataT  v  )

inline

Store wavelet coefficient in subband at given position.

Parameters

pos	A subband position (>= 0)
v	A wavelet coefficient

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

• /Users/ale/src/Scribus/scribus/third_party/pgf/Subband.h
• /Users/ale/src/Scribus/scribus/third_party/pgf/Subband.cpp