Dirac - A Video Codec

Created by the British Broadcasting Corporation.


dirac::FrameCompressor Class Reference

Compress a single image frame. More...

#include <frame_compress.h>

Collaboration diagram for dirac::FrameCompressor:

Collaboration graph
[legend]
List of all members.

Public Member Functions

Private Member Functions

Private Attributes


Detailed Description

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


Constructor & Destructor Documentation

dirac::FrameCompressor::FrameCompressor 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 frame.

Parameters:
encp encoder parameters

dirac::FrameCompressor::~FrameCompressor  ) 
 

dirac::FrameCompressor::FrameCompressor const FrameCompressor cpy  )  [private]
 

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


Member Function Documentation

void dirac::FrameCompressor::AddSubAverage CoeffArray coeff_data,
int  xl,
int  yl,
AddOrSub  dirn
[private]
 

void dirac::FrameCompressor::AnalyseMEData const MEData  )  [private]
 

FrameByteIO* dirac::FrameCompressor::Compress FrameBuffer my_fbuffer,
int  fnum
 

Compresses a specified frame within a group of pictures.

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

void dirac::FrameCompressor::CompressMVData MvDataByteIO mv_data  )  [private]
 

float dirac::FrameCompressor::GetCompLambda const FrameParams fparams,
const CompSort  csort
[private]
 

const MEData* dirac::FrameCompressor::GetMEData  )  const
 

bool dirac::FrameCompressor::IsMEDataAvail  )  const [inline]
 

bool dirac::FrameCompressor::IsSkipped  )  [inline]
 

bool dirac::FrameCompressor::MotionEstimate const FrameBuffer my_fbuffer,
int  fnum
 

Performs motion estimation for a frame and writes the data locally

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

FrameCompressor& dirac::FrameCompressor::operator= const FrameCompressor rhs  )  [private]
 

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

int dirac::FrameCompressor::SelectMultiQuants CoeffArray coeff_data,
SubbandList bands,
const int  band_num,
const float  lambda,
const FrameSort  fsort,
const CompSort  csort
[private]
 

void dirac::FrameCompressor::SelectQuantisers CoeffArray coeff_data,
SubbandList bands,
const float  lambda,
OneDArray< unsigned int > &  est_counts,
const CodeBlockMode  cb_mode,
const FrameSort  fsort,
const CompSort  csort
[private]
 

void dirac::FrameCompressor::SetupCodeBlocks SubbandList bands  )  [private]
 


Member Data Documentation

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

PredMode dirac::FrameCompressor::m_global_pred_mode [private]
 

double dirac::FrameCompressor::m_intra_ratio [private]
 

bool dirac::FrameCompressor::m_is_a_cut [private]
 

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

bool dirac::FrameCompressor::m_medata_avail [private]
 

bool dirac::FrameCompressor::m_skipped [private]
 

bool dirac::FrameCompressor::m_use_block_mv [private]
 

bool dirac::FrameCompressor::m_use_global [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.
HTML documentation generated by Dimitri van Heesch's excellent Doxygen tool.