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CSJ2K.j2k.wavelet.synthesis.CBlkWTDataSrcDec

CBlkWTDataSrcDec Interface

This abstract class defines methods to transfer wavelet data in a code-block by code-block basis, for the decoder side. In each call to 'getCodeBlock()' or 'getInternCodeBlock()' a new code-block is returned. The code-blocks are returned in no specific order.

       <p>This class is the source of data, in general, for the inverse wavelet
       transforms. See the 'InverseWT' class.</p>
Namespace: CSJ2K.j2k.wavelet.synthesis
Assembly: C1.WPF.PdfViewer.4.6.2.dll
Syntax
public interface CBlkWTDataSrcDec : InvWTData, MultiResImgData

Methods

Name Description
getCodeBlock(int, int, int, SubbandSyn, DataBlk)

Returns the specified code-block in the current tile for the specified component, as a copy (see below).

       <p>The returned code-block may be progressive, which is indicated by
       the 'progressive' variable of the returned 'DataBlk' object. If a
       code-block is progressive it means that in a later request to this
       method for the same code-block it is possible to retrieve data which is
       a better approximation, since meanwhile more data to decode for the
       code-block could have been received. If the code-block is not
       progressive then later calls to this method for the same code-block
       will return the exact same data values.</p><p>The data returned by this method is always a copy of the internal
       data of this object, if any, and it can be modified "in place" without
       any problems after being returned. The 'offset' of the returned data is 
       0, and the 'scanw' is the same as the code-block width. See the
       'DataBlk' class.</p>
getFixedPoint(int)

Returns the position of the fixed point in the specified component, or equivalently the number of fractional bits. This is the position of the least significant integral (i.e. non-fractional) bit, which is equivalent to the number of fractional bits. For instance, for fixed-point values with 2 fractional bits, 2 is returned. For floating-point data this value does not apply and 0 should be returned. Position 0 is the position of the least significant bit in the data.
getInternCodeBlock(int, int, int, SubbandSyn, DataBlk)

Returns the specified code-block in the current tile for the specified component (as a reference or copy).

       <p>The returned code-block may be progressive, which is indicated by
       the 'progressive' variable of the returned 'DataBlk' object. If a
       code-block is progressive it means that in a later request to this
       method for the same code-block it is possible to retrieve data which is
       a better approximation, since meanwhile more data to decode for the
       code-block could have been received. If the code-block is not
       progressive then later calls to this method for the same code-block
       will return the exact same data values.</p><p>The data returned by this method can be the data in the internal
       buffer of this object, if any, and thus can not be modified by the
       caller. The 'offset' and 'scanw' of the returned data can be
       arbitrary. See the 'DataBlk' class.</p>
getNomRangeBits(int)

See Also