Dirac - A Video Codec

Created by the British Broadcasting Corporation.


dirac::PictureCompressor Class Reference

Compress a single image picture. More...

#include <picture_compress.h>

Collaboration diagram for dirac::PictureCompressor:

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List of all members.

Public Member Functions

Private Member Functions

Private Attributes


Detailed Description

This class compresses a single picture at a time, using parameters supplied at its construction. PictureCompressor is used by SequenceCompressor.

Constructor & Destructor Documentation

dirac::PictureCompressor::PictureCompressor ( EncoderParams encp  ) 

Creates a FrameEncoder with specific set of parameters the control the compression process. It encodes motion data before encoding each component of the picture.

Parameters:
encp encoder parameters

dirac::PictureCompressor::~PictureCompressor (  ) 

dirac::PictureCompressor::PictureCompressor ( const PictureCompressor cpy  )  [private]

Copy constructor is private and body-less. This class should not be copied.


Member Function Documentation

bool dirac::PictureCompressor::MotionEstimate ( const PictureBuffer my_fbuffer,
int  fnum 
)

Performs motion estimation for a picture and writes the data locally

Parameters:
my_fbuffer picture buffer of uncoded originals
fnum picture number to compress
Returns:
true if a cut is detected.

PictureByteIO* dirac::PictureCompressor::Compress ( PictureBuffer my_fbuffer,
int  fnum 
)

Compresses a specified picture within a group of pictures.

Parameters:
my_fbuffer picture buffer in which the reference frames resides
fnum picture number to compress
Returns:
Compressed picture in Dirac bytestream format

bool dirac::PictureCompressor::IsSkipped (  )  [inline]

bool dirac::PictureCompressor::IsMEDataAvail (  )  const [inline]

const MEData* dirac::PictureCompressor::GetMEData (  )  const

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

Assignment = is private and body-less. This class should not be assigned.

void dirac::PictureCompressor::InitCoeffData ( CoeffArray coeff_data,
const int  xl,
const int  yl 
) [private]

void dirac::PictureCompressor::AnalyseMEData ( const MEData  )  [private]

void dirac::PictureCompressor::CompressMVData ( MvDataByteIO mv_data  )  [private]

float dirac::PictureCompressor::GetCompLambda ( const PictureParams fparams,
const CompSort  csort 
) [private]

void dirac::PictureCompressor::SelectQuantisers ( CoeffArray coeff_data,
SubbandList bands,
const float  lambda,
OneDArray< unsigned int > &  est_counts,
const CodeBlockMode  cb_mode,
const PictureParams pp,
const CompSort  csort 
) [private]

int dirac::PictureCompressor::SelectMultiQuants ( CoeffArray coeff_data,
SubbandList bands,
const int  band_num,
const float  lambda,
const PictureParams pp,
const CompSort  csort 
) [private]

void dirac::PictureCompressor::SetupCodeBlocks ( SubbandList bands  )  [private]

void dirac::PictureCompressor::AddSubAverage ( CoeffArray coeff_data,
int  xl,
int  yl,
AddOrSub  dirn 
) [private]


Member Data Documentation

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

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

bool dirac::PictureCompressor::m_skipped [private]

bool dirac::PictureCompressor::m_use_global [private]

bool dirac::PictureCompressor::m_use_block_mv [private]

PredMode dirac::PictureCompressor::m_global_pred_mode [private]

bool dirac::PictureCompressor::m_medata_avail [private]

bool dirac::PictureCompressor::m_is_a_cut [private]

double dirac::PictureCompressor::m_intra_ratio [private]


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

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