SoJp3dDataCompressor Class Reference
[Compressor]

Large Data Management JP3D data compression More...

#include <LDM/compressors/SoJp3dDataCompressor.h>

Inheritance diagram for SoJp3dDataCompressor:
SoDataCompressor SoTypedObject

List of all members.

Public Member Functions

 SoJp3dDataCompressor ()
virtual ~SoJp3dDataCompressor ()
virtual SbString getCompressionFormatName () const
virtual bool isLossless ()
virtual size_t compress (void *src, size_t srcLen, const TileInfo &tileInfo)
virtual size_t uncompress (void *dst, size_t dstLen, const TileInfo &tileInfo)

Detailed Description

Large Data Management JP3D data compression

This class implements a wavelet compression scheme based on JP3D compression, an extension of the standard JPEG2000 algorithms specifically designed for volume data. It supports lossless and lossy compression. This is controlled by setCompressionLevel (see SoDataCompressor or SoConvertedParameters). A compression level of 0 specifies the lossless mode. Any other value specifies the target PSNR (Peak Signal to Noise Ratio).

Typical values for compression level (PSNR):

Limitations:

SEE ALSO

SoGzipDataCompressor, SoJpegDataCompressor, SoDataCompressor, SoConverterParameters


Constructor & Destructor Documentation

SoJp3dDataCompressor::SoJp3dDataCompressor (  ) 

Constructor.

virtual SoJp3dDataCompressor::~SoJp3dDataCompressor (  )  [virtual]

Destructor.


Member Function Documentation

virtual size_t SoJp3dDataCompressor::compress ( void *  src,
size_t  srcLen,
const TileInfo tileInfo 
) [virtual]

Compresses the given buffer into the internal buffer.

Parameters:
src a pointer to the data to compress.
srcLen the size of the source buffer in bytes.
tileInfo contains information about the tile being processed.
Returns:
The size in bytes of the compressed buffer.

Implements SoDataCompressor.

virtual SbString SoJp3dDataCompressor::getCompressionFormatName (  )  const [virtual]

Returns the name of the compression algorithm used by this class.

This is the name the user must pass to the "-c" option of the converter to use this compression ("jp3d" here).

Returns:
An SbString containing "jp3d".

Implements SoDataCompressor.

virtual bool SoJp3dDataCompressor::isLossless (  )  [virtual]

Checks if the compression is lossless.

The lossless mode is active if the compression level is 0 (the default).

Implements SoDataCompressor.

virtual size_t SoJp3dDataCompressor::uncompress ( void *  dst,
size_t  dstLen,
const TileInfo tileInfo 
) [virtual]

Uncompresses data from the internal buffer to the given buffer.

Parameters:
dst a pointer to the destination buffer.
dstLen the size of the destination buffer.
tileInfo contains information about the tile being processed
Returns:
The number of uncompressed bytes.

Implements SoDataCompressor.


The documentation for this class was generated from the following file:

Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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