Dirac - A Video Codec

Created by the British Broadcasting Corporation.

dirac::CompCompressor

dirac::CompCompressor Class Reference

Compress a frame component. More...

#include <comp_compress.h>

Collaboration diagram for dirac::CompCompressor:

[legend]List of all members.

Public Member Functions

CompCompressor (EncoderParams &encp, const FrameParams &fp)
Constructor.
ComponentByteIO * Compress (PicArray &pic_data, const bool is_a_cut, const double intra_ratio=100.0, MEData *me_data=0)
Compress a frame component.

Private Member Functions

CompCompressor (const CompCompressor &cpy)
Copy constructor is private and body-less. This class should not be copied.
CompCompressor & operator= (const CompCompressor &rhs)
Assignment = is private and body-less. This class should not be assigned.
void SetCompLambda (const double intra_ratio, const bool is_a_cut)
Sets the value m_lambda according to frame and component type.
void SelectQuantisers (PicArray &pic_data, SubbandList &bands, OneDArray< unsigned int > &est_counts, const CodeBlockMode cb_mode)
int SelectMultiQuants (PicArray &pic_data, SubbandList &bands, const int band_num)
void SetupCodeBlocks (SubbandList &bands)
void SetToVal (PicArray &pic_data, const Subband &node, ValueType val)
void AddSubAverage (PicArray &pic_data, int xl, int yl, AddOrSub dirn)

Private Attributes

Detailed Description

This class compresses one of the three components (Y, U, or V) of a frame according to a given set or parameters. CompCompressor is used by FrameCompressor.

Constructor & Destructor Documentation

dirac::CompCompressor::CompCompressor	(	EncoderParams &	encp,
		const FrameParams &	fp
	)

Create and initialize a component compressor with the given characteristics.

Parameters:

	encp	encoding parameters
	fp	frame parameters

dirac::CompCompressor::CompCompressor ( const CompCompressor & cpy ) [private]

Member Function Documentation

ComponentByteIO* dirac::CompCompressor::Compress	(	PicArray &	pic_data,
		const bool	is_a_cut,
		const double	intra_ratio = `100.0`,
		MEData *	me_data = `0`
	)

Compress a PicArray containing a frame component (Y, U, or V).

Parameters:

	pic_data	the component data to be compressed
	is_a_cut	cut detection flag.
	intra_ratio	proportion of intra blocks that motion estimation has found
	me_data	Pointer to the motion vector data

Returns:: Frame-componentin Dirac-bytestream format

CompCompressor& dirac::CompCompressor::operator= ( const CompCompressor & rhs ) [private]

void dirac::CompCompressor::SetCompLambda	(	const double	intra_ratio,
		const bool	is_a_cut
	)			`[private]`

void dirac::CompCompressor::SelectQuantisers	(	PicArray &	pic_data,
		SubbandList &	bands,
		OneDArray< unsigned int > &	est_counts,
		const CodeBlockMode	cb_mode
	)			`[private]`

int dirac::CompCompressor::SelectMultiQuants	(	PicArray &	pic_data,
		SubbandList &	bands,
		const int	band_num
	)			`[private]`

void dirac::CompCompressor::SetupCodeBlocks ( SubbandList & bands ) [private]

void dirac::CompCompressor::SetToVal	(	PicArray &	pic_data,
		const Subband &	node,
		ValueType	val
	)			`[private]`

void dirac::CompCompressor::AddSubAverage	(	PicArray &	pic_data,
		int	xl,
		int	yl,
		AddOrSub	dirn
	)			`[private]`

Member Data Documentation

EncoderParams& dirac::CompCompressor::m_encparams [private]

const FrameParams& dirac::CompCompressor::m_fparams [private]

const FrameSort& dirac::CompCompressor::m_fsort [private]

const ChromaFormat& dirac::CompCompressor::m_cformat [private]

CompSort dirac::CompCompressor::m_csort [private]

float dirac::CompCompressor::m_lambda [private]

MEData* dirac::CompCompressor::m_me_data [private]

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

comp_compress.h

© 2004 British Broadcasting Corporation. Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
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