dirac::PictureDecompressor Class Reference

Compress a single image picture. More...

#include <picture_decompress.h>

Collaboration diagram for dirac::PictureDecompressor:

Public Member Functions
	PictureDecompressor (DecoderParams &decp, ChromaFormat cf)
	Constructor. More...
	~PictureDecompressor ()
	Destructor. More...
bool	Decompress (ParseUnitByteIO &parseunit_byteio, PictureBuffer &my_buffer)
	Decompress the next picture into the buffer. More...
const PictureParams &	GetPicParams () const
	Returns the picture parameters of the current picture being decoded. More...

Private Member Functions
	PictureDecompressor (const PictureDecompressor &cpy)
	Copy constructor is private and body-less. More...
PictureDecompressor &	operator= (const PictureDecompressor &rhs)
	Assignment = is private and body-less. More...
void	InitCoeffData (CoeffArray &coeff_data, const int xl, const int yl)
	Initialise the padded coefficient data for the IDWT and subband decoding. More...
void	CleanReferencePictures (PictureBuffer &my_buffer)
	Removes all the reference pictures in the retired list. More...
void	CompDecompress (TransformByteIO *p_transform_byteio, PictureBuffer &my_buffer, int pnum, CompSort cs)
	Decodes component data. More...
void	DecompressMVData (std::auto_ptr< MvData > &mv_data, PictureByteIO &picture_byteio)
	Decodes the motion data. More...
void	SetMVBlocks ()
	Set the number of superblocks and blocks. More...
void	PushPicture (PictureBuffer &my_buffer)
	Add a picture to the picture buffer. More...

Private Attributes
DecoderParams &	m_decparams
	Parameters for the decompression, as provided in constructor. More...
ChromaFormat	m_cformat
	Chroma format of the picture being decompressed. More...
bool	m_skipped
	An indicator which is true if the picture has been skipped, false otherwise. More...
bool	m_use_global
	An indicator that is true if we use global motion vectors, false otherwise. More...
bool	m_use_block_mv
	An indicator that is true if we use block motion vectors, false otherwise. More...
PredMode	m_global_pred_mode
	Prediction mode to use if we only have global motion vectors. More...
PictureParams	m_pparams
	Current Picture Parameters. More...

Detailed Description

This class decompresses a single picture at a time, using parameters supplied at its construction. PictureDecompressor is used by SequenceDecompressor.

Constructor & Destructor Documentation

dirac::PictureDecompressor::PictureDecompressor	(	DecoderParams &	decp,
		ChromaFormat	cf
	)

Creates a PictureDecompressor with specific set of parameters the control the decompression process. It decodes motion data before decoding each component of the picture.

Parameters

decp	decoder parameters
cf	the chroma format of the picture being decompressed

dirac::PictureDecompressor::~PictureDecompressor

(

)

Releases resources.

dirac::PictureDecompressor::PictureDecompressor ( const PictureDecompressor &  cpy )

private

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

Member Function Documentation

void dirac::PictureDecompressor::CleanReferencePictures ( PictureBuffer &  my_buffer )

private

void dirac::PictureDecompressor::CompDecompress ( TransformByteIO *  p_transform_byteio, PictureBuffer &  my_buffer, int  pnum, CompSort  cs  )

private

bool dirac::PictureDecompressor::Decompress	(	ParseUnitByteIO &	parseunit_byteio,
		PictureBuffer &	my_buffer
	)

Decompresses the next picture from the stream and place at the end of a picture buffer. Returns true if able to decode successfully, false otherwise

Parameters

parseunit_byteio	Picture info in Dirac-stream format
my_buffer	picture buffer into which the picture is placed

void dirac::PictureDecompressor::DecompressMVData ( std::auto_ptr< MvData > &  mv_data, PictureByteIO &  picture_byteio  )

private

const PictureParams& dirac::PictureDecompressor::GetPicParams ( ) const

inline

References m_pparams.

void dirac::PictureDecompressor::InitCoeffData ( CoeffArray &  coeff_data, const int  xl, const int  yl  )

private

PictureDecompressor& dirac::PictureDecompressor::operator= ( const PictureDecompressor &  rhs )

private

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

void dirac::PictureDecompressor::PushPicture ( PictureBuffer &  my_buffer )

private

void dirac::PictureDecompressor::SetMVBlocks ( )

private

Member Data Documentation

ChromaFormat dirac::PictureDecompressor::m_cformat

private

DecoderParams& dirac::PictureDecompressor::m_decparams

private

PredMode dirac::PictureDecompressor::m_global_pred_mode

private

PictureParams dirac::PictureDecompressor::m_pparams

private

Referenced by GetPicParams().

bool dirac::PictureDecompressor::m_skipped

private

bool dirac::PictureDecompressor::m_use_block_mv

private

bool dirac::PictureDecompressor::m_use_global

private

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

• picture_decompress.h