Class BitstreamReaderAgent

  • All Implemented Interfaces:
    CodedCBlkDataSrcDec, InvWTData, MultiResImgData
    Direct Known Subclasses:
    FileBitstreamReaderAgent

    public abstract class BitstreamReaderAgent
    extends Object
    implements CodedCBlkDataSrcDec
    This is the generic interface for bit stream reader agents. A bit stream reader agent is an entity that allows reading from a bit stream and requesting compressed code-blocks. It can be a simple file reader, or a network connection, or anything else.

    The bit stream reader agent allows to make request for compressed block data in any order. The amount of data returned would normally depend on the data available at the time of the request, be it from a file or from a network connection.

    The bit stream reader agent has the notion of a current tile, and coordinates are relative to the current tile, where applicable.

    Resolution level 0 is the lowest resolution level, i.e. the LL subband alone.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected int anbytes
      Actual number of read bytes
      protected float arate
      Actual decoding rate in bpp
      protected int ax
      The horizontal coordinate of the image origin in the canvas system, on the reference grid.
      protected int ay
      The vertical coordinate of the image origin in the canvas system, on the reference grid.
      protected int ctX
      The current tile horizontal index
      protected int ctY
      The current tile vertical index
      protected int[] culx
      The horizontal coordinates of the upper-left corner of the active tile, with respect to the canvas origin, in the component hi-res grid, for each component.
      protected int[] culy
      The vertical coordinates of the upper-left corner of the active tile, with respect to the canvas origin, in the component hi-res grid, for each component.
      protected DecoderSpecs decSpec
      The decoder specifications
      protected boolean[] derived
      Whether or not the components in the current tile uses a derived quantization step size (only relevant in non reversible quantization mode).
      protected int[] gb
      Number of guard bits off all component in the current tile.
      protected HeaderDecoder hd
      The decoded bit stream header
      protected int imgH
      The image width on the hi-res reference grid
      protected int imgW
      The image width on the hi-res reference grid
      protected int[] mdl
      The maximum number of decompostion levels for each component of the current tile.
      protected int nc
      The number of components
      protected int nt
      The total number of tiles.
      protected int ntH
      The nominal tile height, in the hi-res reference grid
      protected int ntW
      The nominal tile width, in the hi-res reference grid
      protected int ntX
      The number of tile in the horizontal direction
      protected int ntY
      The number of tiles in the vertical direction
      protected int[] offX
      The horizontal offsets of the upper-left corner of the current tile (not active tile) with respect to the canvas origin, in the component hi-res grid, for each component.
      protected int[] offY
      The vertical offsets of the upper-left corner of the current tile (not active tile) with respect to the canvas origin, in the component hi-res grid, for each component.
      static char OPT_PREFIX
      The prefix for bit stream reader options: 'B'
      protected StdDequantizerParams[] params
      Dequantization parameters of all subbands and all components in the current tile.
      protected int px
      The horizontal coordinate of the tiling origin in the canvas system, on the reference grid.
      protected int py
      The vertical coordinate of the tiling origin in the canvas system, on the reference grid.
      protected SubbandSyn[] subbTrees
      The subband trees for each component in the current tile.
      protected int targetRes
      Image resolution level to generate
      protected int tnbytes
      Number of bytes targeted to be read
      protected float trate
      Target decoding rate in bpp
    • Method Summary

      All Methods Static Methods Instance Methods Abstract Methods Concrete Methods 
      Modifier and Type Method Description
      static BitstreamReaderAgent createInstance​(RandomAccessIO in, HeaderDecoder hd, J2KImageReadParamJava j2krparam, DecoderSpecs decSpec, boolean cdstrInfo, HeaderInfo hi)
      Creates a bit stream reader of the correct type that works on the provided RandomAccessIO, with the special parameters from the parameter list.
      int getActualNbytes()
      Return the actual number of read bytes.
      float getActualRate()
      Return the actual decoding rate in bits per pixel.
      int getCbULX()
      Returns the vertical code-block partition origin.
      int getCbULY()
      Returns the vertical code-block partition origin.
      int getCompImgHeight​(int c, int rl)
      Returns the height in pixels of the specified component in the overall image, for the given (component) resolution level.
      int getCompImgWidth​(int c, int rl)
      Returns the width in pixels of the specified component in the overall image, for the given (component) resolution level.
      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 getImgHeight​(int rl)
      Returns the overall height of the image in pixels, for the given resolution level.
      int getImgRes()
      Returns the image resolution level to reconstruct from the codestream.
      int getImgULX​(int rl)
      Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid at the specified resolution level.
      int getImgULY​(int rl)
      Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid at the specified resolution level.
      int getImgWidth​(int rl)
      Returns the overall width of the image in pixels, for the given (image) resolution level.
      int getNomTileHeight()
      Returns the nominal tile height
      int getNomTileWidth()
      Returns the nominal tile 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.
      static String[][] getParameterInfo()
      Returns the parameters that are used in this class and implementing classes.
      int getPPX​(int t, int c, int rl)
      Returns the precinct partition width for the specified tile-component and (tile-component) resolution level.
      int getPPY​(int t, int c, int rl)
      Returns the precinct partition height for the specified tile-component and (tile-component) resolution level.
      int getResULX​(int c, int rl)
      Returns the horizontal coordinate of the upper-left corner of the specified resolution in the given component of the current tile.
      int getResULY​(int c, int rl)
      Returns the vertical coordinate of the upper-left corner of the specified component in the given component of the current tile.
      SubbandSyn getSynSubbandTree​(int t, int c)
      Returns the subband tree, for the specified tile-component.
      int getTargetNbytes()
      Return the target number of read bytes.
      float getTargetRate()
      Return the target decoding rate in bits per pixel.
      Point getTile​(Point co)
      Returns the indexes of the current tile.
      int getTileCompHeight​(int t, int c, int rl)
      Returns the height in pixels of the specified tile-component for the given (tile-component) resolution level.
      int getTileCompWidth​(int t, int c, int rl)
      Returns the width in pixels of the specified tile-component for the given (tile-component) resolution level.
      int getTileHeight​(int rl)
      Returns the overall height of the current tile in pixels, for the given resolution level.
      int getTileIdx()
      Returns the index of the current tile, relative to a standard scan-line order.
      int getTilePartULX()
      Returns the horizontal offset of tile partition
      int getTilePartULY()
      Returns the vertical offset of tile partition
      int getTileWidth​(int rl)
      Returns the overall width of the current tile in pixels for the given (tile) resolution level.
      protected void initSubbandsFields​(int c, SubbandSyn sb)
      Initialises subbands fields, such as code-blocks dimension and number of magnitude bits, in the subband tree.
      abstract void nextTile()
      Advances to the next tile, in standard scan-line order (by rows then columns).
      abstract void setTile​(int x, int y)
      Changes the current tile, given the new indexes.
    • Field Detail

      • decSpec

        protected DecoderSpecs decSpec
        The decoder specifications
      • derived

        protected boolean[] derived
        Whether or not the components in the current tile uses a derived quantization step size (only relevant in non reversible quantization mode). This field is actualized by the setTile method in FileBitstreamReaderAgent.
        See Also:
        initSubbandsFields(int, jj2000.j2k.wavelet.synthesis.SubbandSyn)
      • OPT_PREFIX

        public static final char OPT_PREFIX
        The prefix for bit stream reader options: 'B'
        See Also:
        Constant Field Values
      • mdl

        protected int[] mdl
        The maximum number of decompostion levels for each component of the current tile. It means that component c has mdl[c]+1 resolution levels (indexed from 0 to mdl[c])
      • nc

        protected final int nc
        The number of components
      • targetRes

        protected int targetRes
        Image resolution level to generate
      • subbTrees

        protected SubbandSyn[] subbTrees
        The subband trees for each component in the current tile. Each element in the array is the root element of the subband tree for a component. The number of magnitude bits in each subband (magBits member variable) is not initialized.
      • imgW

        protected final int imgW
        The image width on the hi-res reference grid
      • imgH

        protected final int imgH
        The image width on the hi-res reference grid
      • ax

        protected final int ax
        The horizontal coordinate of the image origin in the canvas system, on the reference grid.
      • ay

        protected final int ay
        The vertical coordinate of the image origin in the canvas system, on the reference grid.
      • px

        protected final int px
        The horizontal coordinate of the tiling origin in the canvas system, on the reference grid.
      • py

        protected final int py
        The vertical coordinate of the tiling origin in the canvas system, on the reference grid.
      • offX

        protected final int[] offX
        The horizontal offsets of the upper-left corner of the current tile (not active tile) with respect to the canvas origin, in the component hi-res grid, for each component.
      • offY

        protected final int[] offY
        The vertical offsets of the upper-left corner of the current tile (not active tile) with respect to the canvas origin, in the component hi-res grid, for each component.
      • culx

        protected final int[] culx
        The horizontal coordinates of the upper-left corner of the active tile, with respect to the canvas origin, in the component hi-res grid, for each component.
      • culy

        protected final int[] culy
        The vertical coordinates of the upper-left corner of the active tile, with respect to the canvas origin, in the component hi-res grid, for each component.
      • ntW

        protected final int ntW
        The nominal tile width, in the hi-res reference grid
      • ntH

        protected final int ntH
        The nominal tile height, in the hi-res reference grid
      • ntX

        protected final int ntX
        The number of tile in the horizontal direction
      • ntY

        protected final int ntY
        The number of tiles in the vertical direction
      • nt

        protected final int nt
        The total number of tiles.
      • ctX

        protected int ctX
        The current tile horizontal index
      • ctY

        protected int ctY
        The current tile vertical index
      • hd

        protected final HeaderDecoder hd
        The decoded bit stream header
      • tnbytes

        protected int tnbytes
        Number of bytes targeted to be read
      • anbytes

        protected int anbytes
        Actual number of read bytes
      • trate

        protected float trate
        Target decoding rate in bpp
      • arate

        protected float arate
        Actual decoding rate in bpp
    • Constructor Detail

      • BitstreamReaderAgent

        protected BitstreamReaderAgent​(HeaderDecoder hd,
                                       DecoderSpecs decSpec)
        Initializes members of this class. This constructor takes a HeaderDecoder object. This object must be initialized by the constructor of the implementing class from the header of the bit stream.
        Parameters:
        hd - The decoded header of the bit stream from where to initialize the values.
        decSpec - The decoder specifications
    • Method Detail

      • getCbULX

        public final int getCbULX()
        Returns the vertical code-block partition origin. Allowable values are 0 and 1, nothing else.
        Specified by:
        getCbULX in interface InvWTData
      • getCbULY

        public int getCbULY()
        Returns the vertical code-block partition origin. Allowable values are 0 and 1, nothing else.
        Specified by:
        getCbULY in interface InvWTData
      • getNumComps

        public final int getNumComps()
        Returns the number of components in the image.
        Specified by:
        getNumComps in interface MultiResImgData
        Returns:
        The number of components in the image.
      • getCompSubsX

        public final 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.
        Specified by:
        getCompSubsX in interface MultiResImgData
        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.
        Specified by:
        getCompSubsY in interface MultiResImgData
        Parameters:
        c - The index of the component (between 0 and C-1)
        Returns:
        The vertical subsampling factor of component 'c'
        See Also:
        ImgData
      • getTileWidth

        public int getTileWidth​(int rl)
        Returns the overall width of the current tile in pixels for the given (tile) resolution level. This is the tile's width without accounting for any component subsampling.

        Note: Tile resolution level indexes may be different from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of each component of the tile.

        For an image (1 tile) with 2 components (component 0 having 2 decomposition levels and component 1 having 3 decomposition levels), the first (tile-)component has 3 resolution levels and the second one has 4 resolution levels, whereas the tile has only 3 resolution levels available.

        Specified by:
        getTileWidth in interface MultiResImgData
        Parameters:
        rl - The (tile) resolution level.
        Returns:
        The current tile's width in pixels.
      • getTileHeight

        public int getTileHeight​(int rl)
        Returns the overall height of the current tile in pixels, for the given resolution level. This is the tile's height without accounting for any component subsampling.

        Note: Tile resolution level indexes may be different from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of each component of the tile.

        For an image (1 tile) with 2 components (component 0 having 2 decomposition levels and component 1 having 3 decomposition levels), the first (tile-)component has 3 resolution levels and the second one has 4 resolution levels, whereas the tile has only 3 resolution levels available.

        Specified by:
        getTileHeight in interface MultiResImgData
        Parameters:
        rl - The (tile) resolution level.
        Returns:
        The total current tile's height in pixels.
      • getImgWidth

        public int getImgWidth​(int rl)
        Returns the overall width of the image in pixels, for the given (image) resolution level. This is the image's width without accounting for any component subsampling or tiling.

        Note: Image resolution level indexes may differ from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of each component of each tile.

        Example: For an image (1 tile) with 2 components (component 0 having 2 decomposition levels and component 1 having 3 decomposition levels), the first (tile-) component has 3 resolution levels and the second one has 4 resolution levels, whereas the image has only 3 resolution levels available.

        Specified by:
        getImgWidth in interface MultiResImgData
        Parameters:
        rl - The image resolution level.
        Returns:
        The total image's width in pixels.
      • getImgHeight

        public int getImgHeight​(int rl)
        Returns the overall height of the image in pixels, for the given resolution level. This is the image's height without accounting for any component subsampling or tiling.

        Note: Image resolution level indexes may differ from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of each component of each tile.

        Example: For an image (1 tile) with 2 components (component 0 having 2 decomposition levels and component 1 having 3 decomposition levels), the first (tile-) component has 3 resolution levels and the second one has 4 resolution levels, whereas the image has only 3 resolution levels available.

        Specified by:
        getImgHeight in interface MultiResImgData
        Parameters:
        rl - The image resolution level, from 0 to L.
        Returns:
        The total image's height in pixels.
      • getImgULX

        public int getImgULX​(int rl)
        Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid at the specified resolution level.

        Note: Image resolution level indexes may differ from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of each component of each tile.

        Example: For an image (1 tile) with 2 components (component 0 having 2 decomposition levels and component 1 having 3 decomposition levels), the first (tile-) component has 3 resolution levels and the second one has 4 resolution levels, whereas the image has only 3 resolution levels available.

        Specified by:
        getImgULX in interface MultiResImgData
        Parameters:
        rl - The resolution level, from 0 to L.
        Returns:
        The horizontal coordinate of the image origin in the canvas system, on the reference grid.
      • getImgULY

        public int getImgULY​(int rl)
        Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid at the specified resolution level.

        Note: Image resolution level indexes may differ from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of each component of each tile.

        Example: For an image (1 tile) with 2 components (component 0 having 2 decomposition levels and component 1 having 3 decomposition levels), the first (tile-) component has 3 resolution levels and the second one has 4 resolution levels, whereas the image has only 3 resolution levels available.

        Specified by:
        getImgULY in interface MultiResImgData
        Parameters:
        rl - The resolution level, from 0 to L.
        Returns:
        The vertical coordinate of the image origin in the canvas system, on the reference grid.
      • getTileCompWidth

        public final int getTileCompWidth​(int t,
                                          int c,
                                          int rl)
        Returns the width in pixels of the specified tile-component for the given (tile-component) resolution level.
        Specified by:
        getTileCompWidth in interface MultiResImgData
        Parameters:
        t - The tile index
        c - The index of the component, from 0 to N-1.
        rl - The resolution level, from 0 to L.
        Returns:
        The width in pixels of component c in tile t for resolution level rl.
      • getTileCompHeight

        public final int getTileCompHeight​(int t,
                                           int c,
                                           int rl)
        Returns the height in pixels of the specified tile-component for the given (tile-component) resolution level.
        Specified by:
        getTileCompHeight in interface MultiResImgData
        Parameters:
        t - The tile index.
        c - The index of the component, from 0 to N-1.
        rl - The resolution level, from 0 to L.
        Returns:
        The height in pixels of component c in the current tile.
      • getCompImgWidth

        public final int getCompImgWidth​(int c,
                                         int rl)
        Returns the width in pixels of the specified component in the overall image, for the given (component) resolution level.

        Note: Component resolution level indexes may differ from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of same component of each tile.

        Example: For an image (2 tiles) with 1 component (tile 0 having 2 decomposition levels and tile 1 having 3 decomposition levels), the first tile(-component) has 3 resolution levels and the second one has 4 resolution levels, whereas the component has only 3 resolution levels available.

        Specified by:
        getCompImgWidth in interface MultiResImgData
        Parameters:
        c - The index of the component, from 0 to N-1.
        rl - The resolution level, from 0 to L.
        Returns:
        The width in pixels of component c in the overall image.
      • getCompImgHeight

        public final int getCompImgHeight​(int c,
                                          int rl)
        Returns the height in pixels of the specified component in the overall image, for the given (component) resolution level.

        Note: Component resolution level indexes may differ from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of same component of each tile.

        Example: For an image (2 tiles) with 1 component (tile 0 having 2 decomposition levels and tile 1 having 3 decomposition levels), the first tile(-component) has 3 resolution levels and the second one has 4 resolution levels, whereas the component has only 3 resolution levels available.

        Specified by:
        getCompImgHeight in interface MultiResImgData
        Parameters:
        c - The index of the component, from 0 to N-1.
        rl - The resolution level, from 0 to L.
        Returns:
        The height in pixels of component c in the overall image.
      • setTile

        public abstract 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.
        Specified by:
        setTile in interface MultiResImgData
        Parameters:
        x - The horizontal indexes the tile.
        y - The vertical indexes of the new tile.
      • nextTile

        public abstract 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).
        Specified by:
        nextTile in interface MultiResImgData
      • getTile

        public final Point getTile​(Point co)
        Returns the indexes of the current tile. These are the horizontal and vertical indexes of the current tile.
        Specified by:
        getTile in interface MultiResImgData
        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 final int getTileIdx()
        Returns the index of the current tile, relative to a standard scan-line order.
        Specified by:
        getTileIdx in interface MultiResImgData
        Returns:
        The current tile's index (starts at 0).
      • getResULX

        public final int getResULX​(int c,
                                   int rl)
        Returns the horizontal coordinate of the upper-left corner of the specified resolution in the given component of the current tile.
        Specified by:
        getResULX in interface MultiResImgData
        Parameters:
        c - The component index.
        rl - The resolution level index.
      • getResULY

        public final int getResULY​(int c,
                                   int rl)
        Returns the vertical coordinate of the upper-left corner of the specified component in the given component of the current tile.
        Specified by:
        getResULY in interface MultiResImgData
        Parameters:
        c - The component index.
        rl - The resolution level index.
      • getNumTiles

        public final Point getNumTiles​(Point co)
        Returns the number of tiles in the horizontal and vertical directions.
        Specified by:
        getNumTiles in interface MultiResImgData
        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 final int getNumTiles()
        Returns the total number of tiles in the image.
        Specified by:
        getNumTiles in interface MultiResImgData
        Returns:
        The total number of tiles in the image.
      • getSynSubbandTree

        public final SubbandSyn getSynSubbandTree​(int t,
                                                  int c)
        Returns the subband tree, for the specified tile-component. This method returns the root element of the subband tree structure, see Subband and SubbandSyn. The tree comprises all the available resolution levels.

        Note: this method is not able to return subband tree for a tile different than the current one.

        The number of magnitude bits ('magBits' member variable) for each subband is not initialized.

        Specified by:
        getSynSubbandTree in interface InvWTData
        Specified by:
        getSynSubbandTree in interface MultiResImgData
        Parameters:
        t - The tile index
        c - The index of the component, from 0 to C-1.
        Returns:
        The root of the tree structure.
      • createInstance

        public static BitstreamReaderAgent createInstance​(RandomAccessIO in,
                                                          HeaderDecoder hd,
                                                          J2KImageReadParamJava j2krparam,
                                                          DecoderSpecs decSpec,
                                                          boolean cdstrInfo,
                                                          HeaderInfo hi)
                                                   throws IOException
        Creates a bit stream reader of the correct type that works on the provided RandomAccessIO, with the special parameters from the parameter list.
        Parameters:
        in - The RandomAccessIO source from which to read the bit stream.
        hd - Header of the codestream.
        j2krparam - The parameters applicable to the bit stream read (other parameters may also be present).
        decSpec - The decoder specifications
        cdstrInfo - Whether or not to print information found in codestream.
        hi - Reference to the HeaderInfo instance.
        Throws:
        IOException - If an I/O error occurs while reading initial data from the bit stream.
        IllegalArgumentException - If an unrecognised bit stream reader option is present.
      • getParameterInfo

        public static String[][] getParameterInfo()
        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 and the third one is a long description of what the parameter is. 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.
        Returns:
        the options name, their synopsis and their explanation, or null if no options are supported.
      • getPPX

        public final int getPPX​(int t,
                                int c,
                                int rl)
        Returns the precinct partition width for the specified tile-component and (tile-component) resolution level.
        Parameters:
        t - the tile index
        c - The index of the component (between 0 and N-1)
        rl - The resolution level, from 0 to L.
        Returns:
        the precinct partition width for the specified component, resolution level and tile.
      • getPPY

        public final int getPPY​(int t,
                                int c,
                                int rl)
        Returns the precinct partition height for the specified tile-component and (tile-component) resolution level.
        Parameters:
        t - The tile index
        c - The index of the component (between 0 and N-1)
        rl - The resolution level, from 0 to L.
        Returns:
        The precinct partition height in the specified component, for the specified resolution level, for the current tile.
      • initSubbandsFields

        protected void initSubbandsFields​(int c,
                                          SubbandSyn sb)
        Initialises subbands fields, such as code-blocks dimension and number of magnitude bits, in the subband tree. The nominal code-block width/height depends on the precincts dimensions if used. The way the number of magnitude bits is computed depends on the quantization type (reversible, derived, expounded).
        Parameters:
        c - The component index
        sb - The subband tree to be initialised.
      • getImgRes

        public int getImgRes()
        Returns the image resolution level to reconstruct from the codestream. This value cannot be computed before every main and tile headers are read.
        Returns:
        The image resolution level
      • getTargetRate

        public float getTargetRate()
        Return the target decoding rate in bits per pixel.
        Returns:
        Target decoding rate in bpp.
      • getActualRate

        public float getActualRate()
        Return the actual decoding rate in bits per pixel.
        Returns:
        Actual decoding rate in bpp.
      • getTargetNbytes

        public int getTargetNbytes()
        Return the target number of read bytes.
        Returns:
        Target decoding rate in bytes.
      • getActualNbytes

        public int getActualNbytes()
        Return the actual number of read bytes.
        Returns:
        Actual decoding rate in bytes.
      • getTilePartULX

        public int getTilePartULX()
        Returns the horizontal offset of tile partition
        Specified by:
        getTilePartULX in interface MultiResImgData
      • getTilePartULY

        public int getTilePartULY()
        Returns the vertical offset of tile partition
        Specified by:
        getTilePartULY in interface MultiResImgData