dirac::BandCodec Class Reference

A general class for coding and decoding wavelet subband data. More...

#include <band_codec.h>

Inheritance diagram for dirac::BandCodec:

List of all members.

Public Member Functions
	BandCodec (BasicOutputManager *bits_out, size_t number_of_contexts, const SubbandList &band_list, int band_num)
	Constructor for encoding.
	BandCodec (BitInputManager *bits_in, size_t number_of_contexts, const SubbandList &band_list, int band_num)
	Constructor for decoding.
void	InitContexts ()
	Initialise the contexts according to predefined counts.
Protected Member Functions
void	CodeVal (PicArray &in_data, const ValueType val)
void	DecodeVal (PicArray &out_data)
Protected Attributes
int	m_bnum
	variables
const Subband	m_node
	the subband being coded
int	m_xp
	dimensions of the subband
int	m_yp
int	m_xl
int	m_yl
int	m_xpos
	position within the subband
int	m_ypos
int	m_vol
	size of the subband
int	m_reset_coeff_num
	the number of coefficients after which contexts are reset
int	m_coeff_count
	count of the coefficients since the last context reset
int	m_qf
	quantisation and inverse quantisation values
int	m_qfinv
ValueType	m_offset
	reconstruction point
ValueType	m_nhood_sum
	sum of a neighbourhood of previously (de)coded values
Subband	m_pnode
	the parent subband
int	m_pxp
	coords of the parent subband
int	m_pyp
int	m_pxl
int	m_pyl
int	m_pxpos
	position of the parent coefficient
int	m_pypos
bool	m_parent_notzero
	True if the parent of a coeff is not zero.
ValueType	m_cut_off_point
	used in selecting a context

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Detailed Description

A general class for coding and decoding wavelet subband data.

A general class for coding and decoding wavelet subband data, deriving from the abstract ArithCodec class.

Definition at line 54 of file band_codec.h.

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Constructor & Destructor Documentation

BandCodec::BandCodec (  BasicOutputManager *  bits_out, size_t  number_of_contexts, const SubbandList &  band_list, int  band_num )

Constructor for encoding. Creates a BandCodec object to encode subband data Parameters: bits_out  the output for the encoded bits number_of_contexts  the contexts used in the encoding process band_list  the set of all the subbands band_num  the number of the subband being coded Definition at line 42 of file band_codec.cpp. References m_node, m_pnode, and dirac::Subband::Parent().

BandCodec::BandCodec (  BitInputManager *  bits_in, size_t  number_of_contexts, const SubbandList &  band_list, int  band_num )

Constructor for decoding. Creates a BandCodec object to decode subband data. Parameters: bits_in  the input for the encoded bits number_of_contexts  the contexts used in the decoding process band_list  the set of all the subbands band_num  the number of the subband being decoded Definition at line 62 of file band_codec.cpp.

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

• C:/guliverkli/src/filters/parser/diracsplitter/libdirac/libdirac_common/band_codec.h
• C:/guliverkli/src/filters/parser/diracsplitter/libdirac/libdirac_common/band_codec.cpp

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