ossimKakaduCompressor.cpp File Reference

#include "ossimKakaduCompressor.h"
#include "ossimKakaduCommon.h"
#include "ossimKakaduCompressedTarget.h"
#include "ossimKakaduKeywords.h"
#include <ossim/base/ossimBooleanProperty.h>
#include <ossim/base/ossimCommon.h>
#include <ossim/base/ossimException.h>
#include <ossim/base/ossimIpt.h>
#include <ossim/base/ossimKeywordlist.h>
#include <ossim/base/ossimKeywordNames.h>
#include <ossim/base/ossimNotify.h>
#include <ossim/base/ossimNumericProperty.h>
#include <ossim/base/ossimPreferences.h>
#include <ossim/base/ossimStringProperty.h>
#include <ossim/base/ossimTrace.h>
#include <ossim/imaging/ossimImageData.h>
#include <ossim/imaging/ossimImageGeometry.h>
#include <ossim/support_data/ossimGeoTiff.h>
#include <ossim/support_data/ossimGmlSupportData.h>
#include <ossim/support_data/ossimNitfJ2klraTag.h>
#include <jp2.h>
#include <cmath>

Go to the source code of this file.

Functions
void	transfer_dwords (kdu_core::kdu_line_buf &dest, kdu_core::kdu_int32 *src, int num_samples, int sample_gap, int src_bits, int original_bits, bool is_signed)

Function Documentation

transfer_dwords()

void transfer_dwords	(	kdu_core::kdu_line_buf &	dest,
		kdu_core::kdu_int32 *	src,
		int	num_samples,
		int	sample_gap,
		int	src_bits,
		int	original_bits,
		bool	is_signed
	)

Definition at line 199 of file ossimKakaduCompressor.cpp.

{
   if (dest.get_buf16() != NULL)
   {
      kdu_core::kdu_sample16 *dp = dest.get_buf16();
      int upshift = 32-src_bits; assert(upshift >= 0);
      if (!dest.is_absolute())
      {
          if (is_signed)
            for (; num_samples > 0; num_samples--, src+=sample_gap, dp++)
               dp->ival = (kdu_core::kdu_int16)
                  (((*src) << upshift) >> (32-KDU_FIX_POINT));
         else
            for (; num_samples > 0; num_samples--, src+=sample_gap, dp++)
               dp->ival = (kdu_core::kdu_int16)
                  ((((*src) << upshift)-0x80000000) >> (32-KDU_FIX_POINT));
      }
      else
      { // Reversible processing
         int downshift = 32-original_bits; assert(downshift >= 0);
         if (is_signed)
            for (; num_samples > 0; num_samples--, src+=sample_gap, dp++)
               dp->ival = (kdu_core::kdu_int16)
                  (((*src) << upshift) >> downshift);
         else
            for (; num_samples > 0; num_samples--, src+=sample_gap, dp++)
               dp->ival = (kdu_core::kdu_int16)
                  ((((*src) << upshift) - 0x80000000) >> downshift);
      }
   }
   else
   {
      kdu_core::kdu_sample32 *dp = dest.get_buf32();
      int upshift = 32-src_bits; assert(upshift >= 0);
      if (!dest.is_absolute())
      {
         float scale = 1.0F / (((float)(1<<16)) * ((float)(1<<16)));
         if (is_signed)
            for (; num_samples > 0; num_samples--, src+=sample_gap, dp++)
               dp->fval = scale * (float)((*src)<<upshift);
         else
            for (; num_samples > 0; num_samples--, src+=sample_gap, dp++)
               dp->fval = scale * (float)(((*src)<<upshift)-(1<<31));
      }
      else
      {
         int downshift = 32-original_bits; assert(downshift >= 0);
         if (is_signed)
            for (; num_samples > 0; num_samples--, src+=sample_gap, dp++)
               dp->ival = ((*src)<<upshift) >> downshift;
         else
            for (; num_samples > 0; num_samples--, src+=sample_gap, dp++)
               dp->ival = (((*src)<<upshift)-(1<<31)) >> downshift;
      }
   }
}