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 (CoeffArray &coeff_data, SubbandList &bands, const OneDArray< unsigned int > &estimated_bits)

  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 SetToVal (CoeffArray &coeff_data, const Subband &node, ValueType val)

  Set a subband to a constant value.
  

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

ComponentByteIO* dirac::CompCompressor::Compress	(	CoeffArray &	coeff_data,
		SubbandList &	bands,
		const OneDArray< unsigned int > &	estimated_bits
	)

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

Parameters:

	coeff_data	the component data to be compressed
	bands	Subbands list
	estimated_bits	the list of estimated number of bits in each subband

Returns:

Frame-component in Dirac-bytestream format

CompCompressor& dirac::CompCompressor::operator=

(

const CompCompressor &

rhs

)

[private]

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

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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]

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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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