LDM/compressors/SoJp3dDataCompressor.h

Go to the documentation of this file.

/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
 ***              AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT.                     ***
 ***                                                                                ***
 ***  REPRODUCTION, DISCLOSURE,  OR USE,  IN WHOLE OR IN PART,  OTHER THAN AS       ***
 ***  SPECIFIED  IN THE LICENSE ARE  NOT TO BE  UNDERTAKEN  EXCEPT WITH PRIOR       ***
 ***  WRITTEN AUTHORIZATION OF FEI S.A.S.                                           ***
 ***                                                                                ***
 ***                        RESTRICTED RIGHTS LEGEND                                ***
 ***  USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS      ***
 ***  WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN      ***
 ***  SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT      ***
 ***  CLAUSE  AT FAR 52.227-19  OR SUBPARAGRAPH  (C)(1)(II)  OF  THE RIGHTS IN      ***
 ***  TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013.             ***
 ***                                                                                ***
 ***                   COPYRIGHT (C) 1996-2019 BY FEI S.A.S,                        ***
 ***                        BORDEAUX, FRANCE                                        ***
 ***                      ALL RIGHTS RESERVED                                       ***
**=======================================================================*/
/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/


#pragma once

#include <LDM/compressors/SoDataCompressor.h>

class  SoJp3dDataCompressor : public SoDataCompressor
{
  SO_TYPED_CLASS_HEADER();

public:
  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 );


private:
  template<typename T, typename MappingType>
  static void map( T* src, MappingType* dst, size_t sampleCount, const SbVec2d& range );

  template <typename T, typename MappingType>
  static void unmap( MappingType* src, T* dst, size_t sampleCount, const SbVec2d& range );

  size_t uncompressRaw( void* dst, size_t dstLen, const TileInfo& tileInfo );

  template <typename T>
  size_t uncompressAndUnmap( void* dst, size_t dstLen, const TileInfo& tileInfo );
};

//*****************************************************************************
template<typename T, typename MappingType>
void
SoJp3dDataCompressor::map( T* src, MappingType* dst, size_t sampleCount, const SbVec2d& range )
{
  double rangeOffset = range[0];
  double rangeMax = range[1] - range[0];
  double ratio = 0.0;

  for ( size_t i = 0; i < sampleCount; ++i )
  {
    ratio = ( static_cast<double>( src[i] ) - rangeOffset ) / rangeMax;
    dst[i] = static_cast<MappingType>( ratio * std::numeric_limits<uint16_t>::max() );
  }
}

//*****************************************************************************
template <typename T, typename MappingType>
void
SoJp3dDataCompressor::unmap( MappingType* src, T* dst, size_t sampleCount, const SbVec2d& range )
{
  double rangeMin = range[0];
  double rangeMax = range[1];
  double mappingRange = rangeMax - rangeMin;
  double ratio = 0.0;

  for ( size_t i = 0; i < sampleCount; ++i )
  {
    ratio = static_cast<double>( src[i] ) / std::numeric_limits<MappingType>::max();
    dst[i] = static_cast<T>( rangeMin + ratio*mappingRange );
  }
}

//*****************************************************************************
template <typename T>
size_t
SoJp3dDataCompressor::uncompressAndUnmap( void* dst, size_t dstLen, const TileInfo& tileInfo )
{
  T* dstBuffer = reinterpret_cast<T*>( dst );

  size_t sampleCount = tileInfo.dims[0];
  sampleCount *= tileInfo.dims[1];
  sampleCount *= tileInfo.dims[2];

  size_t dstSampleCount = dstLen / sizeof( T );

  if ( sampleCount > dstSampleCount )
  {
    SoDebugError::post(
      "SoJp3dDataCompressor::uncompressAndUnmap",
      "%ld samples to uncompress, only space for %ld samples in destination.", sampleCount, dstSampleCount
    );

    return 0;
  }

  std::vector<uint16_t> mapBuffer( sampleCount );
  size_t uncompressedBytes = uncompressRaw( &mapBuffer[0], mapBuffer.size() * sizeof( uint16_t ), tileInfo );
  size_t uncompressedSamples = uncompressedBytes / sizeof( uint16_t );

  if ( uncompressedSamples != sampleCount )
  {
    SoDebugError::post(
      "SoJp3dDataCompressor::uncompressAndUnmap",
      "incorrect sample count, %ld sampled decoded on %ld.", uncompressedSamples, sampleCount
    );

    return 0;
  }

  unmap( &mapBuffer[0], dstBuffer, mapBuffer.size(), tileInfo.range );

  return mapBuffer.size() * sizeof( T );
}

---

Open Inventor Toolkit reference manual, generated on 15 Mar 2023
Copyright © Thermo Fisher Scientific All rights reserved. http://www.openinventor.com/