# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

# dirac::BlockDiff Class Reference

An abstract class for doing block difference calculations.

`#include <me_utils.h>`

Inheritance diagram for dirac::BlockDiff:

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Collaboration diagram for dirac::BlockDiff:

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List of all members.

## Public Member Functions

- BlockDiff (const PicArray &ref, const PicArray &pic)
    Constructor, initialising the reference and picture data.
- virtual ~BlockDiff ()
    Destructor.
- virtual float Diff (const BlockDiffParams &dparams, const MVector &mv)=0
    Do the difference, returning SAD.

## Protected Attributes

- const PicArray & m_pic_data
- const PicArray & m_ref_data

## Private Member Functions

- BlockDiff (const BlockDiff &cpy)
    Private, bodyless copy-constructor: class should not be copied.
- BlockDiff & operator= (const BlockDiff &rhs)
    Private, bodyless assignment=: class should not be assigned.

## Constructor & Destructor Documentation

dirac::BlockDiff::BlockDiff | ( | const PicArray & | ref,
|  | const PicArray & | pic |
| ) |  |  |

virtual dirac::BlockDiff::~BlockDiff | ( |  | ) | `[inline, virtual]`

dirac::BlockDiff::BlockDiff | ( | const BlockDiff & | cpy | ) | `[private]`

## Member Function Documentation

virtual float dirac::BlockDiff::Diff | ( | const BlockDiffParams & | dparams,
|  | const MVector & | mv |
| ) |  |  | `[pure virtual]`

Do the difference, returning SAD

Parameters:

  | dparams | block parameters
  | mv | the motion vector being used

Implemented in dirac::PelBlockDiff, dirac::BlockDiffUp, dirac::BlockDiffHalfPel, dirac::BlockDiffQuarterPel, and dirac::BlockDiffEighthPel.

BlockDiff& dirac::BlockDiff::operator= | ( | const BlockDiff & | rhs | ) | `[private]`

## Member Data Documentation

const PicArray& dirac::BlockDiff::m_pic_data`[protected]`

const PicArray& dirac::BlockDiff::m_ref_data`[protected]`

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

- me_utils.h

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