jj2000.j2k.entropy.encoder

Class StdEntropyCoder.Compressor

java.lang.Object

jj2000.j2k.entropy.encoder.StdEntropyCoder.Compressor

All Implemented Interfaces:

Runnable

Enclosing class:

StdEntropyCoder

private class StdEntropyCoder.Compressor
extends Object
implements Runnable

Class that takes care of running the 'compressCodeBlock()' method with thread local arguments. Used only in multithreaded implementation.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	c The component on which to compress
(package private) CBlkRateDistStats	ccb The object where to store the compressed code-block
private int	idx The index of this compressor.
(package private) int	lcType The length calculation type to use in compression
(package private) int	options The options bitmask to use in compression
(package private) boolean	rev The reversible flag to use in compression
private long[]	time The cumulative wall time for this compressor, for each component.
(package private) int	tType The MQ termination type to use in compression

Constructor Summary

Constructors

Constructor and Description
StdEntropyCoder.Compressor(int idx) Creates a new compressor object with the given index.

Method Summary

Methods

Modifier and Type	Method and Description
int	getIdx() Returns the index of this compressor.
(package private) long	getTiming(int c) Returns the wall time spent by this compressor for component 'c' since the last call to this method (or the creation of this compressor if not yet called).
void	run() Calls the 'compressCodeBlock()' method with thread local arguments.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

idx

private final int idx

The index of this compressor. Used to access thread local variables

ccb

CBlkRateDistStats ccb

The object where to store the compressed code-block

c

int c

The component on which to compress

options

int options

The options bitmask to use in compression

rev

boolean rev

The reversible flag to use in compression

lcType

int lcType

The length calculation type to use in compression

tType

int tType

The MQ termination type to use in compression

time

private long[] time

The cumulative wall time for this compressor, for each component.

Constructor Detail

StdEntropyCoder.Compressor

StdEntropyCoder.Compressor(int idx)

Creates a new compressor object with the given index.

Parameters:

idx - The index of this compressor.

Method Detail

run

public void run()

Calls the 'compressCodeBlock()' method with thread local arguments. Once completed it adds itself to the 'completedComps[c]' stack, where 'c' is the component for which this compressor is running. This last step occurs even if exceptions are thrown by the 'compressCodeBlock()' method.

Specified by:

run in interface Runnable

getTiming

long getTiming(int c)

Returns the wall time spent by this compressor for component 'c' since the last call to this method (or the creation of this compressor if not yet called). If DO_TIMING is false 0 is returned.

Returns:

The wall time in milliseconds spent by this compressor since the last call to this method.

getIdx

public int getIdx()

Returns the index of this compressor.

Returns:

The index of this compressor.