Dirac - A Video Codec

Created by the British Broadcasting Corporation.

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dirac::CompCompressor Class Reference

Compress a frame component. More...

#include <comp_compress.h>

List of all members.

Public Member Functions

• CompCompressor (EncoderParams &encp, const FrameParams &fp)

  Constructor.
  

• ComponentByteIO * Compress (PicArray &pic_data)

  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 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

• EncoderParams & m_encparams
• const FrameParams & m_fparams
• const FrameSort & m_fsort
• const ChromaFormat & m_cformat
• CompSort m_csort
• float m_lambda

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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.

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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]

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Member Function Documentation

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

ComponentByteIO* dirac::CompCompressor::Compress

(

PicArray &

pic_data

)

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

Parameters:

pic_data

the component data to be compressed

Returns:

Frame-componentin Dirac-bytestream format

CompCompressor& dirac::CompCompressor::operator=

(

const CompCompressor &

rhs

)

[private]

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

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

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

void dirac::CompCompressor::SetupCodeBlocks

(

SubbandList &

bands

)

[private]

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Member Data Documentation

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

CompSort dirac::CompCompressor::m_csort [private]

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

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

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

float dirac::CompCompressor::m_lambda [private]

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

• comp_compress.h

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