Public Member Functions

ArithCodec (ByteIO *p_byteio, size_t number_of_contexts)
Constructor for encoding.
virtual ~ArithCodec ()
Destructor.
int Compress (T &in_data)
Compresses the input and returns the number of bits written.
void Decompress (T &out_data, const int num_bytes)
Decompresses the bitstream and writes into the output.

Protected Member Functions

virtual void DoWorkCode (T &in_data)=0
Does the work of actually coding the data.
virtual void DoWorkDecode (T &out_data)=0
virtual decode-only functions ///////////////////////////////

Detailed Description

template<class T>
class dirac::ArithCodec< T >

This is an abtract binary arithmetic encoding class, used as the base for concrete classes that encode motion vectors and subband residues.

Parameters:

T

a container (most probably, or array) type

Constructor & Destructor Documentation

template<class T >

dirac::ArithCodec< T >::ArithCodec	(	ByteIO *	p_byteio,
		size_t	number_of_contexts
	)

Creates an ArithCodec object to decode input based on a set of parameters.

Parameters:

	p_byteio	input/output for encoded bits
	number_of_contexts	the number of contexts used

template<class T>

virtual dirac::ArithCodec< T >::~ArithCodec ( ) [inline, virtual]

Destructor is virtual as this class is abstract.

Member Function Documentation

template<class T>

int dirac::ArithCodec< T >::Compress ( T & in_data )

Compress takes a type T object (a container or array) and compresses it using the abstract function DoWorkCode() which is overridden in subclasses. It returns the number of bits written.

Parameters:

in_data

the input to be compressed. Non-const, since the compression may be lossy.

References dirac::ArithCodecBase::ByteCount(), dirac::ArithCodec< T >::DoWorkCode(), dirac::ArithCodecBase::FlushEncoder(), and dirac::ArithCodecBase::InitEncoder().

template<class T>