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

void dirac::CompCompressor::AddSubAverage ( PicArray & pic_data,

int xl,

int yl,

AddOrSub dirn

) [private]

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

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::SetCompLambda ( const double intra_ratio,

const bool is_a_cut

) [private]

void dirac::CompCompressor::SetToVal ( PicArray & pic_data,

const Subband & node,

ValueType val

) [private]

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

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]

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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