Dirac - A Video Codec

Created by the British Broadcasting Corporation.


dirac::SplitModeCodec Class Reference

Codes and decodes the split mode. More...

#include <mv_codec.h>

Inheritance diagram for dirac::SplitModeCodec:
Collaboration diagram for dirac::SplitModeCodec:

Public Member Functions

 SplitModeCodec (ByteIO *p_byteio, 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

 SplitModeCodec (const SplitModeCodec &cpy)
 Private, bodyless copy constructor: class should not be copied.
SplitModeCodecoperator= (const SplitModeCodec &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 ()
unsigned int Prediction (const TwoDArray< int > &mbdata) const

Private Attributes

int m_sb_xp
int m_sb_yp

Additional Inherited Members

Protected Member Functions inherited from dirac::ArithCodecBase
void InitEncoder ()
 Initialises the Encoder.
void EncodeSymbol (const bool symbol, const int context_num)
 encodes a symbol and writes to output
void EncodeUInt (const unsigned int value, const int bin1, const int max_bin)
void EncodeSInt (const int value, const int bin1, const int max_bin)
void FlushEncoder ()
 flushes the output of the encoder.
int ByteCount () const
void InitDecoder (int num_bytes)
 Initialise the Decoder.
bool DecodeSymbol (int context_num)
 Decodes a symbol given a context number.
unsigned int DecodeUInt (const int bin1, const int max_bin)
int DecodeSInt (const int bin1, const int max_bin)
Protected Attributes inherited from dirac::ArithCodecBase
std::vector< Contextm_context_list
 List of contexts.

Detailed Description

Derived from the ArithCodec class, this codes and decodes the split mode

Constructor & Destructor Documentation

◆ SplitModeCodec() [1/2]

dirac::SplitModeCodec::SplitModeCodec ( ByteIO * p_byteio,
size_t number_of_contexts )

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

Parameters
p_byteioInput/output for the encoded bits
number_of_contextsthe number of contexts used

Referenced by operator=(), and SplitModeCodec().

◆ SplitModeCodec() [2/2]

dirac::SplitModeCodec::SplitModeCodec ( const SplitModeCodec & cpy)
private

References SplitModeCodec().

Member Function Documentation

◆ CodeVal()

void dirac::SplitModeCodec::CodeVal ( const MvData & in_data)
private

◆ DecodeVal()

void dirac::SplitModeCodec::DecodeVal ( MvData & out_data)
private

◆ DoWorkCode()

void dirac::SplitModeCodec::DoWorkCode ( MvData & in_data)
privatevirtual

◆ DoWorkDecode()

void dirac::SplitModeCodec::DoWorkDecode ( MvData & out_data)
privatevirtual

◆ InitContexts()

void dirac::SplitModeCodec::InitContexts ( )

◆ operator=()

SplitModeCodec & dirac::SplitModeCodec::operator= ( const SplitModeCodec & rhs)
private

References SplitModeCodec().

◆ Prediction()

unsigned int dirac::SplitModeCodec::Prediction ( const TwoDArray< int > & mbdata) const
private

◆ ResetAll()

void dirac::SplitModeCodec::ResetAll ( )
private

Member Data Documentation

◆ m_sb_xp

int dirac::SplitModeCodec::m_sb_xp
private

◆ m_sb_yp

int dirac::SplitModeCodec::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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