Dirac - A Video Codec

Created by the British Broadcasting Corporation.

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dirac::MotionCompensator Class Reference

Motion compensator class. More...

#include <mot_comp.h>

Collaboration diagram for dirac::MotionCompensator:

[legend]List of all members.

Public Member Functions

• MotionCompensator (const CodecParams &cp, const AddOrSub direction)

  Constructor.
  

• ~MotionCompensator ()

  Destructor.
  

• void CompensateFrame (FrameBuffer &my_buffer, int fnum, const MvData &mv_data)

  Compensate a frame.
  

Private Member Functions

• MotionCompensator (const MotionCompensator &cpy)
• MotionCompensator & operator= (const MotionCompensator &rhs)
• void CompensateComponent (Frame &picframe, const Frame &ref1frame, const Frame &ref2frame, const MvData &mv_data, const CompSort cs)

  Motion-compensate a component.
  

• void CompensateBlock (TwoDArray< CalcValueType > &pic_data, const PicArray &refup_data, const MVector &Vec, const ImageCoords &Pos, const TwoDArray< CalcValueType > &Weights)

  Motion-compensate an individual block.
  

• void DCBlock (TwoDArray< CalcValueType > &pic_data, const ValueType dc, const ImageCoords &Pos, const TwoDArray< CalcValueType > &Weights)

  DC-compensate an individual block.
  

• void ReConfig ()

  Recalculate the weight matrix and store other key block related parameters.
  

• float RaisedCosine (float t, float B)
• void CreateBlock (const OLBParams &bparams, bool FullX, bool FullY, TwoDArray< CalcValueType > &WeightArray)

  Calculates a weighting block.
  

• void FlipX (const TwoDArray< CalcValueType > &Original, const OLBParams &bparams, TwoDArray< CalcValueType > &Flipped)

  Flips the values in an array in the x direction.
  

• void FlipY (const TwoDArray< CalcValueType > &Original, const OLBParams &bparams, TwoDArray< CalcValueType > &Flipped)

  Flips the values in an array in the y direction.
  

Private Attributes

• CodecParams m_cparams

  The codec parameters.
  

• ChromaFormat m_cformat

  The chroma format.
  

• bool luma_or_chroma
• AddOrSub m_add_or_sub
• OLBParams m_bparams
• TwoDArray< CalcValueType > * m_block_weights
• TwoDArray< CalcValueType > * m_half_block_weights

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Detailed Description

Motion compensator class, for doing motion compensation with two references and overlapped blocks, using raised-cosine roll-off.

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Constructor & Destructor Documentation

dirac::MotionCompensator::MotionCompensator (  const CodecParams &  cp, const AddOrSub  direction )

Constructor initialises using codec parameters.

dirac::MotionCompensator::~MotionCompensator (   )

dirac::MotionCompensator::MotionCompensator (  const MotionCompensator &  cpy  )  [private]

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Member Function Documentation

void dirac::MotionCompensator::CompensateBlock (  TwoDArray< CalcValueType > &  pic_data, const PicArray &  refup_data, const MVector &  Vec, const ImageCoords &  Pos, const TwoDArray< CalcValueType > &  Weights )  [private]

void dirac::MotionCompensator::CompensateComponent (  Frame &  picframe, const Frame &  ref1frame, const Frame &  ref2frame, const MvData &  mv_data, const CompSort  cs )  [private]

void dirac::MotionCompensator::CompensateFrame (  FrameBuffer &  my_buffer, int  fnum, const MvData &  mv_data )

Perform motion compensated addition/subtraction on a frame using parameters Parameters: fnum  number of frame in the frame buffer to be compensated my_buffer  the FrameBuffer object containing the frame and the reference frames ` mv_data  the motion vector data

void dirac::MotionCompensator::CreateBlock (  const OLBParams &  bparams, bool  FullX, bool  FullY, TwoDArray< CalcValueType > &  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< CalcValueType > &  pic_data, const ValueType  dc, const ImageCoords &  Pos, const TwoDArray< CalcValueType > &  Weights )  [private]

void dirac::MotionCompensator::FlipX (  const TwoDArray< CalcValueType > &  Original, const OLBParams &  bparams, TwoDArray< CalcValueType > &  Flipped )  [private]

void dirac::MotionCompensator::FlipY (  const TwoDArray< CalcValueType > &  Original, const OLBParams &  bparams, TwoDArray< CalcValueType > &  Flipped )  [private]

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

float dirac::MotionCompensator::RaisedCosine (  float  t, float  B )  [private]

void dirac::MotionCompensator::ReConfig (   )  [private]

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Member Data Documentation

bool dirac::MotionCompensator::luma_or_chroma [private]

AddOrSub dirac::MotionCompensator::m_add_or_sub [private]

TwoDArray<CalcValueType>* dirac::MotionCompensator::m_block_weights [private]

OLBParams dirac::MotionCompensator::m_bparams [private]

ChromaFormat dirac::MotionCompensator::m_cformat [private]

CodecParams dirac::MotionCompensator::m_cparams [private]

TwoDArray<CalcValueType>* dirac::MotionCompensator::m_half_block_weights [private]

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

• mot_comp.h

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