Dirac - A Video Codec

Created by the British Broadcasting Corporation.


Public Member Functions | Private Member Functions | Private Attributes
dirac::DCCodec Class Reference

Codes and decodes a set of DC values. More...

#include <mv_codec.h>

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List of all members.

Public Member Functions

 DCCodec (ByteIO *p_byteio, const CompSort csort, size_t number_of_contexts)
 Constructor.
void InitContexts ()
 Initialises the contexts.
- Public Member Functions inherited from dirac::ArithCodec< MvData >
 ArithCodec (ByteIO *p_byteio, size_t number_of_contexts)
 Constructor for encoding.
virtual ~ArithCodec ()
 Destructor.
int Compress (MvData &in_data)
 Compresses the input and returns the number of bits written.
void Decompress (MvData &out_data, const int num_bytes)
 Decompresses the bitstream and writes into the output.
- Public Member Functions inherited from dirac::ArithCodecBase
 ArithCodecBase (ByteIO *p_byteio, size_t number_of_contexts)
 Constructor.
virtual ~ArithCodecBase ()
 Destructor.

Private Member Functions

 DCCodec (const DCCodec &cpy)
 Private, bodyless copy constructor: class should not be copied.
DCCodecoperator= (const DCCodec &rhs)
 Private, bodyless copy operator=: class should not be assigned.
void CodeVal (const MvData &in_data)
void DecodeVal (MvData &out_data)
void DoWorkCode (MvData &in_data)
 Does the work of actually coding the data.
void DoWorkDecode (MvData &out_data)
 virtual decode-only functions ////////////////////////////
void ResetAll ()
ValueType Prediction (const TwoDArray< ValueType > &dcdata, const TwoDArray< PredMode > &preddata) const

Private Attributes

const CompSort m_csort
int m_b_xp
int m_b_yp
int m_sb_xp
int m_sb_yp
int m_sb_tlb_x
int m_sb_tlb_y

Additional Inherited Members


Detailed Description

Derived from the ArithCodec class, this codes and decodes all the DC values for a component


Constructor & Destructor Documentation

dirac::DCCodec::DCCodec ( ByteIO p_byteio,
const CompSort  csort,
size_t  number_of_contexts 
)

Creates a MvDataCodec object to encode MV data, based on parameters

Parameters:
p_byteioInput/output for the encoded bits
csortThe identity of the component (Y, U or V)
number_of_contextsthe number of contexts used
dirac::DCCodec::DCCodec ( const DCCodec cpy)
private

Member Function Documentation

void dirac::DCCodec::CodeVal ( const MvData in_data)
private
void dirac::DCCodec::DecodeVal ( MvData out_data)
private
void dirac::DCCodec::DoWorkCode ( MvData in_data)
privatevirtual
void dirac::DCCodec::DoWorkDecode ( MvData out_data)
privatevirtual
void dirac::DCCodec::InitContexts ( )
DCCodec& dirac::DCCodec::operator= ( const DCCodec rhs)
private
ValueType dirac::DCCodec::Prediction ( const TwoDArray< ValueType > &  dcdata,
const TwoDArray< PredMode > &  preddata 
) const
private
void dirac::DCCodec::ResetAll ( )
private

Member Data Documentation

int dirac::DCCodec::m_b_xp
private
int dirac::DCCodec::m_b_yp
private
const CompSort dirac::DCCodec::m_csort
private
int dirac::DCCodec::m_sb_tlb_x
private
int dirac::DCCodec::m_sb_tlb_y
private
int dirac::DCCodec::m_sb_xp
private
int dirac::DCCodec::m_sb_yp
private

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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