Dirac - A Video Codec

Created by the British Broadcasting Corporation.


Public Member Functions | Static Public Member Functions | Protected Attributes | Private Member Functions

dirac::MotionCompensator Class Reference

Abstract Motion compensator class. More...

#include <mot_comp.h>

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List of all members.

Public Member Functions

Static Public Member Functions

Protected Attributes

Private Member Functions


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

dirac::MotionCompensator::MotionCompensator ( const PicturePredParams ppp)

Constructor initialises using codec parameters.

virtual dirac::MotionCompensator::~MotionCompensator ( ) [virtual]
dirac::MotionCompensator::MotionCompensator ( const MotionCompensator cpy) [private]

Member Function Documentation

void dirac::MotionCompensator::AdjustBlockByRefWeights ( TwoDArray< ValueType > &  val1_block,
TwoDArray< ValueType > &  val2_block,
PredMode  block_mode 
) [private]
void dirac::MotionCompensator::AdjustBlockBySpatialWeights ( TwoDArray< ValueType > &  val_block,
const ImageCoords pos,
const TwoDArray< ValueType > &  wt_array 
) [private]
virtual void dirac::MotionCompensator::BlockPixelPred ( TwoDArray< ValueType > &  block_data,
const ImageCoords pos,
const ImageCoords orig_pic_size,
const PicArray refup_data,
const MVector mv 
) [private, pure virtual]
void dirac::MotionCompensator::CalculateWeights ( int  xbsep,
int  ybsep,
TwoDArray< ValueType > *  wt_array 
) [private]
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 
) [private, virtual]
void dirac::MotionCompensator::CompensateComponent ( Picture pic,
Picture refsptr[2],
const MvData mv_data,
const CompSort  cs 
) [private]
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

Parameters:
directionwhether we're subtracting or adding `
mv_datathe motion vector data
in_picPointer to picture being motion compensated
refsptrArray of pointers to reference pictures.
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:
pppPicture prediction parameters
directionwhether we're subtracting or adding
mv_datathe motion vector data
in_picPointer to picture being motion compensated
refptrArray of pointers to reference pictures.
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 ******** * * * * * *

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

DC-compensate an individual block

void dirac::MotionCompensator::FlipX ( const TwoDArray< ValueType > &  Original,
TwoDArray< ValueType > &  Flipped 
) [private]
void dirac::MotionCompensator::FlipY ( const TwoDArray< ValueType > &  Original,
TwoDArray< ValueType > &  Flipped 
) [private]
MotionCompensator& dirac::MotionCompensator::operator= ( const MotionCompensator rhs) [private]
void dirac::MotionCompensator::ReConfig ( ) [private]

Member Data Documentation


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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