dirac::MotionCompensator Class Reference

Abstract Motion compensator class. More...

#include <mot_comp.h>

Inheritance diagram for dirac::MotionCompensator:

Collaboration diagram for dirac::MotionCompensator:

Public Member Functions
	MotionCompensator (const PicturePredParams &ppp)
	Constructor.
virtual	~MotionCompensator ()
	Destructor.
void	CompensatePicture (const AddOrSub direction, const MvData &mv_data, Picture *in_pic, Picture *refsptr[2])
	Compensate a picture.

Static Public Member Functions
static void	CompensatePicture (const PicturePredParams &ppp, const AddOrSub direction, const MvData &mv_data, Picture *in_pic, Picture *refptr[2])
	Convenience function to perform motion compensation on a picture.

Protected Attributes
PicturePredParams	m_predparams
	The codec parameters.
ChromaFormat	m_cformat
	The chroma format.
bool	luma_or_chroma
AddOrSub	m_add_or_sub
OLBParams	m_bparams
TwoDArray< ValueType > *	m_block_weights
TwoDArray< ValueType > *	m_macro_block_weights
TwoDArray< ValueType > *	m_sub_block_weights

Private Member Functions
	MotionCompensator (const MotionCompensator &cpy)
MotionCompensator &	operator= (const MotionCompensator &rhs)
void	CompensateComponent (Picture *pic, Picture *refsptr[2], const MvData &mv_data, const CompSort cs)
	Motion-compensate a component.
void	DCBlock (TwoDArray< ValueType > &block_data, const ValueType dc)
	Recalculate the weight matrix and store other key block related parameters.
void	ReConfig ()
void	CalculateWeights (int xbsep, int ybsep, TwoDArray< ValueType > *wt_array)
void	CreateBlock (int xbsep, int ybsep, bool FullX, bool FullY, TwoDArray< ValueType > &WeightArray)
	Calculates a weighting block.
void	FlipX (const TwoDArray< ValueType > &Original, TwoDArray< ValueType > &Flipped)
	Flips the values in an array in the x direction.
void	FlipY (const TwoDArray< ValueType > &Original, TwoDArray< ValueType > &Flipped)
	Flips the values in an array in the y direction.
virtual void	CompensateBlock (TwoDArray< ValueType > &pic_data, const ImageCoords &pos, const ImageCoords &orig_pic_size, PredMode block_mode, ValueType dc, const PicArray &ref1up_data, const MVector &mv1, const PicArray &ref2up_data, const MVector &mv2, const TwoDArray< ValueType > &Weights)
virtual void	BlockPixelPred (TwoDArray< ValueType > &block_data, const ImageCoords &pos, const ImageCoords &orig_pic_size, const PicArray &refup_data, const MVector &mv)=0
	Predict pixels in a block. Pure virtual. SubClasses need to define it.
void	AdjustBlockByRefWeights (TwoDArray< ValueType > &val1_block, TwoDArray< ValueType > &val2_block, PredMode block_mode)
void	AdjustBlockBySpatialWeights (TwoDArray< ValueType > &val_block, const ImageCoords &pos, const TwoDArray< ValueType > &wt_array)

Detailed Description

Motion compensator class, for doing motion compensation with two references and overlapped blocks, using raised-cosine roll-off. This is an abstract class. It must be sub-classed and the BlockPixelPred must be defined in the sub-classes.

Constructor & Destructor Documentation

MotionCompensator() [1/2]

dirac::MotionCompensator::MotionCompensator

(

const PicturePredParams &

ppp

)

Constructor initialises using codec parameters.

~MotionCompensator()

virtual dirac::MotionCompensator::~MotionCompensator ( )

virtual

MotionCompensator() [2/2]

dirac::MotionCompensator::MotionCompensator ( const MotionCompensator & cpy )

private

Member Function Documentation

AdjustBlockByRefWeights()

void dirac::MotionCompensator::AdjustBlockByRefWeights ( TwoDArray< ValueType > & val1_block, TwoDArray< ValueType > & val2_block, PredMode block_mode )

private

AdjustBlockBySpatialWeights()

void dirac::MotionCompensator::AdjustBlockBySpatialWeights ( TwoDArray< ValueType > & val_block, const ImageCoords & pos, const TwoDArray< ValueType > & wt_array )

private

BlockPixelPred()

virtual void dirac::MotionCompensator::BlockPixelPred ( TwoDArray< ValueType > & block_data, const ImageCoords & pos, const ImageCoords & orig_pic_size, const PicArray & refup_data, const MVector & mv )

privatepure virtual

Implemented in dirac::MotionCompensator_Pixel, dirac::MotionCompensator_HalfPixel, dirac::MotionCompensator_QuarterPixel, and dirac::MotionCompensator_EighthPixel.

CalculateWeights()

void dirac::MotionCompensator::CalculateWeights ( int xbsep, int ybsep, TwoDArray< ValueType > * wt_array )

private

CompensateBlock()

virtual void dirac::MotionCompensator::CompensateBlock ( TwoDArray< ValueType > & pic_data, const ImageCoords & pos, const ImageCoords & orig_pic_size, PredMode block_mode, ValueType dc, const PicArray & ref1up_data, const MVector & mv1, const PicArray & ref2up_data, const MVector & mv2, const TwoDArray< ValueType > & Weights )

privatevirtual

CompensateComponent()

void dirac::MotionCompensator::CompensateComponent ( Picture * pic, Picture * refsptr[2], const MvData & mv_data, const CompSort cs )

private

CompensatePicture() [1/2]

void dirac::MotionCompensator::CompensatePicture	(	const AddOrSub	direction,
		const MvData &	mv_data,
		Picture *	in_pic,
		Picture *	refsptr[2] )

    Perform motion compensated addition/subtraction on a picture using
    parameters
    \param    direction whether we're subtracting or adding

`

Parameters

mv_data	the motion vector data
in_pic	Pointer to picture being motion compensated
refsptr	Array of pointers to reference pictures.

CompensatePicture() [2/2]

static void dirac::MotionCompensator::CompensatePicture ( const PicturePredParams & ppp, const AddOrSub direction, const MvData & mv_data, Picture * in_pic, Picture * refptr[2] )

static

Static function that motion compensates a picture. It uses the MV precision value in the PicturePredParams to instantiate the appropriate MotionCompensation sub-class.

Parameters

ppp	Picture prediction parameters
direction	whether we're subtracting or adding
mv_data	the motion vector data
in_pic	Pointer to picture being motion compensated
refptr	Array of pointers to reference pictures.

CreateBlock()

void dirac::MotionCompensator::CreateBlock ( int xbsep, int ybsep, bool FullX, bool FullY, TwoDArray< ValueType > & WeightArray )

private

Params defines the block parameters so the relevant weighting arrays can be created. FullX and FullY refer to whether the weight should be adjusted for the edge of an image. eg. 1D Weighting shapes in x direction FullX true FullX false

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DCBlock()

void dirac::MotionCompensator::DCBlock ( TwoDArray< ValueType > & block_data, const ValueType dc )

private

DC-compensate an individual block

FlipX()

void dirac::MotionCompensator::FlipX ( const TwoDArray< ValueType > & Original, TwoDArray< ValueType > & Flipped )

private

FlipY()

void dirac::MotionCompensator::FlipY ( const TwoDArray< ValueType > & Original, TwoDArray< ValueType > & Flipped )

private

operator=()

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

private

ReConfig()

void dirac::MotionCompensator::ReConfig ( )

private

Member Data Documentation

luma_or_chroma

bool dirac::MotionCompensator::luma_or_chroma

protected

m_add_or_sub

AddOrSub dirac::MotionCompensator::m_add_or_sub

protected

m_block_weights

TwoDArray<ValueType>* dirac::MotionCompensator::m_block_weights

protected

m_bparams

OLBParams dirac::MotionCompensator::m_bparams

protected

m_cformat

ChromaFormat dirac::MotionCompensator::m_cformat

protected

m_macro_block_weights

TwoDArray<ValueType>* dirac::MotionCompensator::m_macro_block_weights

protected

m_predparams

PicturePredParams dirac::MotionCompensator::m_predparams

protected

m_sub_block_weights

TwoDArray<ValueType>* dirac::MotionCompensator::m_sub_block_weights

protected

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

• mot_comp.h