C# Класс CSJ2K.j2k.entropy.encoder.PostCompRateAllocator

This is the abstract class from which post-compression rate allocators which generate layers should inherit. The source of data is a 'CodedCBlkDataSrcEnc' which delivers entropy coded blocks with rate-distortion statistics.

The post compression rate allocator implementation should create the layers, according to a rate allocation policy, and send the packets to a CodestreamWriter. Since the rate allocator sends the packets to the bit stream then it should output the packets to the bit stream in the order imposed by the bit stream profiles.

Наследование: CSJ2K.j2k.image.ImgDataAdapter

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Защищенные свойства (Protected)

Свойство	Тип	Описание
encSpec	CSJ2K.j2k.encoder.EncoderSpecs
num_Layers	int
src	CodedCBlkDataSrcEnc

Открытые методы

Метод	Описание
PostCompRateAllocator ( CodedCBlkDataSrcEnc src, int nl, CSJ2K.j2k.codestream.writer.CodestreamWriter bw, CSJ2K.j2k.encoder.EncoderSpecs encSpec ) : System	Initializes the source of entropy coded data.
createInstance ( CodedCBlkDataSrcEnc src, CSJ2K.j2k.util.ParameterList pl, float rate, CSJ2K.j2k.codestream.writer.CodestreamWriter bw, CSJ2K.j2k.encoder.EncoderSpecs encSpec ) : PostCompRateAllocator	Creates a PostCompRateAllocator object for the appropriate rate allocation parameters in the parameter list 'pl', having 'src' as the source of entropy coded data, 'rate' as the target bitrate and 'bw' as the bit stream writer object.
initialize ( ) : void	Initializes the rate allocation points, taking into account header overhead and such. This method must be called after the header has been simulated but before calling the runAndWrite() one. The header must be rewritten after a call to this method since the number of layers may change.
runAndWrite ( ) : void	Runs the rate allocation algorithm and writes the data to the bit stream. This must be called after the initialize() method.

Приватные методы

Метод	Описание
parseAlayers ( System params_Renamed, float rate ) : CSJ2K.j2k.entropy.encoder.LayersInfo	Convenience method that parses the 'Alayers' option.

Описание методов

PostCompRateAllocator() публичный Метод

Initializes the source of entropy coded data.

public PostCompRateAllocator ( CodedCBlkDataSrcEnc src, int nl, CSJ2K.j2k.codestream.writer.CodestreamWriter bw, CSJ2K.j2k.encoder.EncoderSpecs encSpec ) : System
src	CodedCBlkDataSrcEnc	The source of entropy coded data. /// ///
nl	int
bw	CSJ2K.j2k.codestream.writer.CodestreamWriter	The packet bit stream writer. /// ///
encSpec	CSJ2K.j2k.encoder.EncoderSpecs
Результат	System

createInstance() публичный статический Метод

Creates a PostCompRateAllocator object for the appropriate rate allocation parameters in the parameter list 'pl', having 'src' as the source of entropy coded data, 'rate' as the target bitrate and 'bw' as the bit stream writer object.

public static createInstance ( CodedCBlkDataSrcEnc src, CSJ2K.j2k.util.ParameterList pl, float rate, CSJ2K.j2k.codestream.writer.CodestreamWriter bw, CSJ2K.j2k.encoder.EncoderSpecs encSpec ) : PostCompRateAllocator
src	CodedCBlkDataSrcEnc	The source of entropy coded data. /// ///
pl	CSJ2K.j2k.util.ParameterList	The parameter lis (or options). /// ///
rate	float	The target bitrate for the rate allocation /// ///
bw	CSJ2K.j2k.codestream.writer.CodestreamWriter	The bit stream writer object, where the bit stream data will /// be written. /// ///
encSpec	CSJ2K.j2k.encoder.EncoderSpecs
Результат	PostCompRateAllocator

initialize() публичный абстрактный Метод

Initializes the rate allocation points, taking into account header overhead and such. This method must be called after the header has been simulated but before calling the runAndWrite() one. The header must be rewritten after a call to this method since the number of layers may change.

public abstract initialize ( ) : void
Результат	void

runAndWrite() публичный абстрактный Метод

Runs the rate allocation algorithm and writes the data to the bit stream. This must be called after the initialize() method.

public abstract runAndWrite ( ) : void
Результат	void

Описание свойств

encSpec защищенное свойство

The source of entropy coded data

protected EncoderSpecs,CSJ2K.j2k.encoder encSpec
Результат	CSJ2K.j2k.encoder.EncoderSpecs

num_Layers защищенное свойство

The number of layers.

protected int num_Layers
Результат	int

src защищенное свойство

The source of entropy coded data

protected CodedCBlkDataSrcEnc src
Результат	CodedCBlkDataSrcEnc