jj2000.j2k.image

Class ImgDataAdapter

java.lang.Object

jj2000.j2k.image.ImgDataAdapter

All Implemented Interfaces:

ImgData

Direct Known Subclasses:

EntropyCoder, ForwardWT, ForwCompTransf, ImgDataConverter, InvCompTransf, PostCompRateAllocator, Quantizer, ROIScaler, Tiler

public abstract class ImgDataAdapter
extends Object
implements ImgData

This class provides a default implementation of the methods in the 'ImgData' interface. The default implementation is just to return the value of the source, where the source is another 'ImgData' object.

This abstract class can be used to facilitate the development of other classes that implement 'ImgData'. For example a YCbCr color transform can inherit from this class and all the trivial methods do not have to be re-implemented.

If the default implementation of a method provided in this class does not suit a particular implementation of the 'ImgData' interface, the method can be overridden to implement the proper behavior.

See Also:

ImgData

Field Summary

Fields

Modifier and Type	Field and Description
protected ImgData	imgdatasrc The ImgData source
protected int	tIdx Index of the current tile

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ImgDataAdapter(ImgData src) Instantiates the ImgDataAdapter object specifying the ImgData source.

Method Summary

Modifier and Type	Method and Description
int	getCompImgHeight(int c) Returns the height in pixels of the specified component in the overall image.
int	getCompImgWidth(int c) Returns the width in pixels of the specified component in the overall image.
int	getCompSubsX(int c) Returns the component subsampling factor in the horizontal direction, for the specified component.
int	getCompSubsY(int c) Returns the component subsampling factor in the vertical direction, for the specified component.
int	getCompULX(int c) Returns the horizontal coordinate of the upper-left corner of the specified component in the current tile.
int	getCompULY(int c) Returns the vertical coordinate of the upper-left corner of the specified component in the current tile.
int	getImgHeight() Returns the overall height of the image in pixels.
int	getImgULX() Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
int	getImgULY() Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
int	getImgWidth() Returns the overall width of the image in pixels.
int	getNomRangeBits(int c) Returns the number of bits, referred to as the "range bits", corresponding to the nominal range of the image data in the specified component.
int	getNomTileHeight() Returns the nominal tiles height
int	getNomTileWidth() Returns the nominal tiles width
int	getNumComps() Returns the number of components in the image.
int	getNumTiles() Returns the total number of tiles in the image.
Point	getNumTiles(Point co) Returns the number of tiles in the horizontal and vertical directions.
Point	getTile(Point co) Returns the indexes of the current tile.
int	getTileCompHeight(int t, int c) Returns the height in pixels of the specified tile-component.
int	getTileCompWidth(int t, int c) Returns the width in pixels of the specified tile-component tile.
int	getTileHeight() Returns the overall height of the current tile in pixels.
int	getTileIdx() Returns the index of the current tile, relative to a standard scan-line order.
int	getTilePartULX() Returns the horizontal tile partition offset in the reference grid
int	getTilePartULY() Returns the vertical tile offset in the reference grid
int	getTileWidth() Returns the overall width of the current tile in pixels.
void	nextTile() Advances to the next tile, in standard scan-line order (by rows then columns).
void	setTile(int x, int y) Changes the current tile, given the new indexes.

Methods inherited from class java.lang.Object

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

Field Detail

tIdx

protected int tIdx

Index of the current tile

imgdatasrc

protected ImgData imgdatasrc

The ImgData source

Constructor Detail

ImgDataAdapter

protected ImgDataAdapter(ImgData src)

Instantiates the ImgDataAdapter object specifying the ImgData source.

Parameters:

src - From where to obtain all the ImgData values.

Method Detail

getTileWidth

public int getTileWidth()

Returns the overall width of the current tile in pixels. This is the tile's width without accounting for any component subsampling. This is also referred as the reference grid width in the current tile.

This default implementation returns the value of the source.

Specified by:

getTileWidth in interface ImgData

Returns:

The total current tile's width in pixels.

getTileHeight

public int getTileHeight()

Returns the overall height of the current tile in pixels. This is the tile's height without accounting for any component subsampling. This is also referred as the reference grid height in the current tile.

This default implementation returns the value of the source.

Specified by:

getTileHeight in interface ImgData

Returns:

The total current tile's height in pixels.

getNomTileWidth

public int getNomTileWidth()

Returns the nominal tiles width

Specified by:

getNomTileWidth in interface ImgData

getNomTileHeight

public int getNomTileHeight()

Returns the nominal tiles height

Specified by:

getNomTileHeight in interface ImgData

getImgWidth

public int getImgWidth()

Returns the overall width of the image in pixels. This is the image's width without accounting for any component subsampling or tiling.

This default implementation returns the value of the source.

Specified by:

getImgWidth in interface ImgData

Returns:

The total image's width in pixels.

getImgHeight

public int getImgHeight()

Returns the overall height of the image in pixels. This is the image's height without accounting for any component subsampling or tiling.

This default implementation returns the value of the source.

Specified by:

getImgHeight in interface ImgData

Returns:

The total image's height in pixels.

getNumComps

public int getNumComps()

Returns the number of components in the image.

This default implementation returns the value of the source.

Specified by:

getNumComps in interface ImgData

Returns:

The number of components in the image.

getCompSubsX

public int getCompSubsX(int c)

Returns the component subsampling factor in the horizontal direction, for the specified component. This is, approximately, the ratio of dimensions between the reference grid and the component itself, see the 'ImgData' interface desription for details.

This default implementation returns the value of the source.

Specified by:

getCompSubsX in interface ImgData

Parameters:

c - The index of the component (between 0 and N-1)

Returns:

The horizontal subsampling factor of component 'c'

See Also:

ImgData

getCompSubsY

public int getCompSubsY(int c)

Returns the component subsampling factor in the vertical direction, for the specified component. This is, approximately, the ratio of dimensions between the reference grid and the component itself, see the 'ImgData' interface desription for details.

This default implementation returns the value of the source.

Specified by:

getCompSubsY in interface ImgData

Parameters:

c - The index of the component (between 0 and N-1)

Returns:

The vertical subsampling factor of component 'c'

See Also:

ImgData

getTileCompWidth

public int getTileCompWidth(int t,
                            int c)

Returns the width in pixels of the specified tile-component tile.

This default implementation returns the value of the source.

Specified by:

getTileCompWidth in interface ImgData

Parameters:

t - Tile index

c - The index of the component, from 0 to N-1.

Returns:

The width in pixels of component c in tilet.

getTileCompHeight

public int getTileCompHeight(int t,
                             int c)

Returns the height in pixels of the specified tile-component.

This default implementation returns the value of the source.

Specified by:

getTileCompHeight in interface ImgData

Parameters:

t - The tile index.

c - The index of the component, from 0 to N-1.

Returns:

The height in pixels of component c in tile t.

getCompImgWidth

public int getCompImgWidth(int c)

Returns the width in pixels of the specified component in the overall image.

This default implementation returns the value of the source.

Specified by:

getCompImgWidth in interface ImgData

Parameters:

c - The index of the component, from 0 to N-1.

Returns:

The width in pixels of component c in the overall image.

getCompImgHeight

public int getCompImgHeight(int c)

Returns the height in pixels of the specified component in the overall image.

This default implementation returns the value of the source.

Specified by:

getCompImgHeight in interface ImgData

Parameters:

c - The index of the component, from 0 to N-1.

Returns:

The height in pixels of component c in the overall image.

getNomRangeBits

public int getNomRangeBits(int c)

Returns the number of bits, referred to as the "range bits", corresponding to the nominal range of the image data in the specified component. If this number is n then for unsigned data the nominal range is between 0 and 2^b-1, and for signed data it is between -2^(b-1) and 2^(b-1)-1. In the case of transformed data which is not in the image domain (e.g., wavelet coefficients), this method returns the "range bits" of the image data that generated the coefficients.

This default implementation returns the value of the source.

Specified by:

getNomRangeBits in interface ImgData

Parameters:

c - The index of the component.

Returns:

The number of bits corresponding to the nominal range of the image data (in the image domain).

setTile

public void setTile(int x,
                    int y)

Changes the current tile, given the new indexes. An IllegalArgumentException is thrown if the indexes do not correspond to a valid tile.

This default implementation just changes the tile in the source.

Specified by:

setTile in interface ImgData

Parameters:

x - The horizontal index of the tile.

y - The vertical index of the new tile.

nextTile

public void nextTile()

Advances to the next tile, in standard scan-line order (by rows then columns). An NoNextElementException is thrown if the current tile is the last one (i.e. there is no next tile).

This default implementation just advances to the next tile in the source.

Specified by:

nextTile in interface ImgData

getTile

public Point getTile(Point co)

Returns the indexes of the current tile. These are the horizontal and vertical indexes of the current tile.

This default implementation returns the value of the source.

Specified by:

getTile in interface ImgData

Parameters:

co - If not null this object is used to return the information. If null a new one is created and returned.

Returns:

The current tile's indexes (vertical and horizontal indexes).

getTileIdx

public int getTileIdx()

Returns the index of the current tile, relative to a standard scan-line order.

This default implementation returns the value of the source.

Specified by:

getTileIdx in interface ImgData

Returns:

The current tile's index (starts at 0).

getCompULX

public int getCompULX(int c)

Returns the horizontal coordinate of the upper-left corner of the specified component in the current tile.

This default implementation returns the value of the source.

Specified by:

getCompULX in interface ImgData

Parameters:

c - The component index.

getCompULY

public int getCompULY(int c)

Returns the vertical coordinate of the upper-left corner of the specified component in the current tile.

This default implementation returns the value of the source.

Specified by:

getCompULY in interface ImgData

Parameters:

c - The component index.

getTilePartULX

public int getTilePartULX()

Returns the horizontal tile partition offset in the reference grid

Specified by:

getTilePartULX in interface ImgData

getTilePartULY

public int getTilePartULY()

Returns the vertical tile offset in the reference grid

Specified by:

getTilePartULY in interface ImgData

getImgULX

public int getImgULX()

Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.

This default implementation returns the value of the source.

Specified by:

getImgULX in interface ImgData

Returns:

The horizontal coordinate of the image origin in the canvas system, on the reference grid.

getImgULY

public int getImgULY()

Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.

This default implementation returns the value of the source.

Specified by:

getImgULY in interface ImgData

Returns:

The vertical coordinate of the image origin in the canvas system, on the reference grid.

getNumTiles

public Point getNumTiles(Point co)

Returns the number of tiles in the horizontal and vertical directions.

This default implementation returns the value of the source.

Specified by:

getNumTiles in interface ImgData

Parameters:

co - If not null this object is used to return the information. If null a new one is created and returned.

Returns:

The number of tiles in the horizontal (Point.x) and vertical (Point.y) directions.

getNumTiles

public int getNumTiles()

Returns the total number of tiles in the image.

This default implementation returns the value of the source.

Specified by:

getNumTiles in interface ImgData

Returns:

The total number of tiles in the image.