C# Класс CSJ2K.j2k.codestream.reader.HeaderDecoder

Creates a HeaderDecoder instance and read in two passes the main header of the codestream. The first and last marker segments shall be respectively SOC and SOT.

Print information about the current header.

Checks that the marker segment length is correct.

Creates and returns the ChannelDefinitonMapper which maps the input channels to the channel definition for the appropriate colorspace.

Creates and returns the EnumeratedColorSpaceMapper corresponding to the information read from the JP2 image file via the ColorSpace parameter.

Returns the dequantizer parameters. Dequantizer parameters normally are the quantization step sizes, see DequantizerParams.

Creates and returns the entropy decoder corresponding to the information read from the codestream header and with the special additional parameters from the parameter list.

Creates and returns the PalettizedColorSpaceMapper which uses the input samples as indicies into a sample palette to construct the output.

Creates and returns the ROIDeScaler corresponding to the information read from the codestream header and with the special additional parameters from the parameter list.

Creates and returns the Resampler which converts the input source to one in which all channels have the same number of samples. This is required for colorspace conversions.

This method extracts a marker segment in a tile-part header and stores it into a byte buffer for the second pass. The marker is first recognized, then its flag is activated and, finally, its content is buffered in an element of byte arrays accessible thanks to a hashTable. If a marker segment is not recognized, it prints a warning and skip it according to its length.

Returns the component sub-sampling factor, with respect to the reference grid, along the horizontal direction for the specified component.

Returns the component sub-sampling factor, with respect to the reference grid, along the vertical direction for the specified component.

Returns the original bitdepth of the specified component.

Returns the precinct partition width for the specified tile-component and resolution level.

Returns the precinct partition height for the specified tile-component and resolution level.

Return the packed packet headers for a given tile.

Returns the tiling origin, referred to as '(Px,Py)' in the 'ImgData' interface.

Returns true if the original data of the specified component was signed. If the data was not signed a level shift has to be applied at the end of the decompression chain.

Returns the boolean used to know if the precinct partition is used

Retrieves and reads all marker segments previously found in the tile-part header.

Method that resets members indicating which markers have already been found

This method extract a marker segment from the main header and stores it into a byte buffer for the second pass. The marker segment is first identified. Then its flag is activated. Finally, its content is buffered into a byte array stored in an hashTable.

If the marker is not recognized, it prints a warning and skips it according to its length.

SIZ marker segment shall be the first encountered marker segment.

Reads the COC marker segment and realigns the codestream where the next marker should be found.

Reads a COD marker segment and realigns the codestream where the next marker should be found.

Reads a COM marker segments and realigns the bit stream at the point where the next marker segment should be found. COM is an informational marker segment that allows to include unstructured data in the main and tile-part headers.

Reads a CRG marker segment and checks its length. CRG is an informational marker segment that allows specific registration of components with respect to each other.

Reads a wavelet filter from the codestream and returns the filter object that implements it.

Retrieves and reads all marker segments found in the main header during the first pass.

Reads PLM marker segment and realigns the codestream where the next marker should be found. Informations stored in these fields are currently not taken into account.

Reads the PLT fields and realigns the codestream where the next marker should be found. Informations stored in these fields are currently NOT taken into account.

Reads the POC marker segment and realigns the codestream where the next marker should be found.

Reads the PPM marker segment of the main header.

Reads the PPT marker segment of the main header.

Reads a QCC marker segment and realigns the codestream at the point where the next marker should be found. QCC is a functional marker segment that describes the quantization of one component.

Reads a QCD marker segment and realigns the codestream at the point where the next marker should be found. QCD is a functional marker segment that describes the quantization default.

Reads the RGN marker segment of the codestream header.

May be used in tile or main header. If used in main header, it refers to the maxshift value of a component in all tiles. When used in tile header, only the particular tile-component is affected.

Reads the SIZ marker segment and realigns the codestream at the point where the next marker segment should be found.

SIZ is a fixed information marker segment containing informations about image and tile sizes. It is required in the main header immediately after SOC.

Reads TLM marker segment and realigns the codestream where the next marker should be found. Informations stored in these fields are currently NOT taken into account.