Java Doc for PostCompRateAllocator.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » jj2000 » j2k » entropy » encoder » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » jj2000.j2k.entropy.encoder 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   jj2000.j2k.image.ImgDataAdapter
      jj2000.j2k.entropy.encoder.PostCompRateAllocator

All known Subclasses:   jj2000.j2k.entropy.encoder.EBCOTRateAllocator,
PostCompRateAllocator
abstract public class PostCompRateAllocator extends ImgDataAdapter (Code)
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.
See Also:   CodedCBlkDataSrcEnc
See Also:   jj2000.j2k.codestream.writer.CodestreamWriter



Field Summary
final public static  charOPT_PREFIX
    
 CodestreamWriterbsWriter
    
 HeaderEncoderheadEnc
    
protected  intnumLayers
     The number of layers.
protected  CodedCBlkDataSrcEncsrc
    
protected  J2KImageWriteParamJavawp
    

Constructor Summary
public  PostCompRateAllocator(CodedCBlkDataSrcEnc src, int nl, CodestreamWriter bw, J2KImageWriteParamJava wp)
     Initializes the source of entropy coded data.

Method Summary
public static  PostCompRateAllocatorcreateInstance(CodedCBlkDataSrcEnc src, float rate, CodestreamWriter bw, J2KImageWriteParamJava wp)
     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  intgetNumLayers()
     Returns the number of layers that are actually generated.
public static  String[][]getParameterInfo()
     Returns the parameters that are used in this class and implementing classes.
abstract public  voidinitialize()
     Initializes the rate allocation points, taking into account header overhead and such.
abstract public  voidrunAndWrite()
     Runs the rate allocation algorithm and writes the data to the bit stream.
public  voidsetHeaderEncoder(HeaderEncoder headEnc)
     Keep a reference to the header encoder.

Field Detail
OPT_PREFIX
final public static char OPT_PREFIX(Code)
The prefix for rate allocation options: 'A'



bsWriter
CodestreamWriter bsWriter(Code)
The bit-stream writer



headEnc
HeaderEncoder headEnc(Code)
The header encoder



numLayers
protected int numLayers(Code)
The number of layers.



src
protected CodedCBlkDataSrcEnc src(Code)
The source of entropy coded data



wp
protected J2KImageWriteParamJava wp(Code)
The source of entropy coded data




Constructor Detail
PostCompRateAllocator
public PostCompRateAllocator(CodedCBlkDataSrcEnc src, int nl, CodestreamWriter bw, J2KImageWriteParamJava wp)(Code)
Initializes the source of entropy coded data.
Parameters:
  src - The source of entropy coded data.
Parameters:
  ln - The number of layers to create
Parameters:
  pt - The Progression type, as defined in 'ProgressionType'.
Parameters:
  bw - The packet bit stream writer.
See Also:   ProgressionType




Method Detail
createInstance
public static PostCompRateAllocator createInstance(CodedCBlkDataSrcEnc src, float rate, CodestreamWriter bw, J2KImageWriteParamJava wp)(Code)
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.
Parameters:
  src - The source of entropy coded data.
Parameters:
  pl - The parameter lis (or options).
Parameters:
  rate - The target bitrate for the rate allocation
Parameters:
  bw - The bit stream writer object, where the bit stream data willbe written.



getNumLayers
public int getNumLayers()(Code)
Returns the number of layers that are actually generated. The number of layers generated.



getParameterInfo
public static String[][] getParameterInfo()(Code)
Returns the parameters that are used in this class and implementing classes. It returns a 2D String array. Each of the 1D arrays is for a different option, and they have 3 elements. The first element is the option name, the second one is the synopsis, the third one is a long description of what the parameter is and the fourth is its default value. The synopsis or description may be 'null', in which case it is assumed that there is no synopsis or description of the option, respectively. Null may be returned if no options are supported. the options name, their synopsis and their explanation,or null if no options are supported.



initialize
abstract public void initialize() throws IOException(Code)
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.
Parameters:
  oldSyntax - Whether or not the old syntax is used.
See Also:   PostCompRateAllocator.runAndWrite



runAndWrite
abstract public void runAndWrite() throws IOException(Code)
Runs the rate allocation algorithm and writes the data to the bit stream. This must be called after the initialize() method.
See Also:   PostCompRateAllocator.initialize



setHeaderEncoder
public void setHeaderEncoder(HeaderEncoder headEnc)(Code)
Keep a reference to the header encoder.
Parameters:
  headEnc - The header encoder



Fields inherited from jj2000.j2k.image.ImgDataAdapter
protected ImgData imgdatasrc(Code)(Java Doc)
protected int tIdx(Code)(Java Doc)

Methods inherited from jj2000.j2k.image.ImgDataAdapter
public int getCompImgHeight(int c)(Code)(Java Doc)
public int getCompImgWidth(int c)(Code)(Java Doc)
public int getCompSubsX(int c)(Code)(Java Doc)
public int getCompSubsY(int c)(Code)(Java Doc)
public int getCompULX(int c)(Code)(Java Doc)
public int getCompULY(int c)(Code)(Java Doc)
public int getImgHeight()(Code)(Java Doc)
public int getImgULX()(Code)(Java Doc)
public int getImgULY()(Code)(Java Doc)
public int getImgWidth()(Code)(Java Doc)
public int getNomRangeBits(int c)(Code)(Java Doc)
public int getNomTileHeight()(Code)(Java Doc)
public int getNomTileWidth()(Code)(Java Doc)
public int getNumComps()(Code)(Java Doc)
public Point getNumTiles(Point co)(Code)(Java Doc)
public int getNumTiles()(Code)(Java Doc)
public Point getTile(Point co)(Code)(Java Doc)
public int getTileCompHeight(int t, int c)(Code)(Java Doc)
public int getTileCompWidth(int t, int c)(Code)(Java Doc)
public int getTileHeight()(Code)(Java Doc)
public int getTileIdx()(Code)(Java Doc)
public int getTilePartULX()(Code)(Java Doc)
public int getTilePartULY()(Code)(Java Doc)
public int getTileWidth()(Code)(Java Doc)
public void nextTile()(Code)(Java Doc)
public void setTile(int x, int y)(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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