Program: gdcm
Module: $RCSfile: gdcmPixelReadConvert.cxx,v $
Language: C++
- Date: $Date: 2005/01/31 05:24:21 $
- Version: $Revision: 1.41 $
+ Date: $Date: 2005/01/31 06:17:22 $
+ Version: $Revision: 1.42 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
}
else if ( IsRLELossless )
{
- if ( ! RLEInfo->ReadAndDecompressRLEFile( fp, Raw, XSize, YSize, ZSize, BitsAllocated ) )
+ if ( ! RLEInfo->DecompressRLEFile( fp, Raw, XSize, YSize, ZSize, BitsAllocated ) )
{
gdcmVerboseMacro( "RLE decompressor failed." );
return false;
Program: gdcm
Module: $RCSfile: gdcmRLEFrame.cxx,v $
Language: C++
- Date: $Date: 2005/01/26 11:42:02 $
- Version: $Revision: 1.3 $
+ Date: $Date: 2005/01/31 06:17:22 $
+ Version: $Revision: 1.4 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
os << indent
<< "--- fragments"
<< std::endl;
- for ( unsigned int i = 0; i < NumberFragments; i++ )
+ for ( unsigned int i = 0; i < NumberOfFragments; i++ )
{
os << indent
<< " offset : " << Offset[i]
return Length[id];
}
+uint8_t *RLEFrame::ReadAndDecompressRLEFrame( uint8_t *subRaw,
+ long rawSegmentSize,
+ std::ifstream *fp )
+{
+ // Loop on the fragments
+ for( unsigned int k = 1; k <= NumberOfFragments; k++ )
+ {
+ // First thing need to reset file to proper position:
+ fp->seekg(Offset[k], std::ios::beg);
+ ReadAndDecompressRLEFragment(subRaw, Length[k],
+ rawSegmentSize, fp);
+ subRaw += rawSegmentSize;
+ }
+
+ return subRaw;
+}
+
+/**
+ * \brief Implementation of the RLE decoding algorithm for decompressing
+ * a RLE fragment. [refer to PS 3.5-2003, section G.3.2 p 86]
+ * @param subRaw Sub region of \ref Raw where the decoded fragment
+ * should be placed.
+ * @param fragmentSize The length of the binary fragment as found on the disk.
+ * @param RawSegmentSize The expected length of the fragment ONCE
+ * Raw.
+ * @param fp File Pointer: on entry the position should be the one of
+ * the fragment to be decoded.
+ */
+bool RLEFrame::ReadAndDecompressRLEFragment( uint8_t *subRaw,
+ long fragmentSize,
+ long rawSegmentSize,
+ std::ifstream *fp )
+{
+ int8_t count;
+ long numberOfOutputBytes = 0;
+ long numberOfReadBytes = 0;
+
+
+ while( numberOfOutputBytes < rawSegmentSize )
+ {
+ fp->read( (char*)&count, 1 );
+ numberOfReadBytes += 1;
+ if ( count >= 0 )
+ // Note: count <= 127 comparison is always true due to limited range
+ // of data type int8_t [since the maximum of an exact width
+ // signed integer of width N is 2^(N-1) - 1, which for int8_t
+ // is 127].
+ {
+ fp->read( (char*)subRaw, count + 1);
+ numberOfReadBytes += count + 1;
+ subRaw += count + 1;
+ numberOfOutputBytes += count + 1;
+ }
+ else
+ {
+ if ( count <= -1 && count >= -127 )
+ {
+ int8_t newByte;
+ fp->read( (char*)&newByte, 1);
+ numberOfReadBytes += 1;
+ for( int i = 0; i < -count + 1; i++ )
+ {
+ subRaw[i] = newByte;
+ }
+ subRaw += -count + 1;
+ numberOfOutputBytes += -count + 1;
+ }
+ }
+ // if count = 128 output nothing
+
+ if ( numberOfReadBytes > fragmentSize )
+ {
+ gdcmVerboseMacro( "Read more bytes than the segment size.");
+ return false;
+ }
+ }
+ return true;
+}
+
+
} // end namespace gdcm
Program: gdcm
Module: $RCSfile: gdcmRLEFrame.h,v $
Language: C++
- Date: $Date: 2005/01/31 05:24:21 $
- Version: $Revision: 1.13 $
+ Date: $Date: 2005/01/31 06:17:22 $
+ Version: $Revision: 1.14 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
class GDCM_EXPORT RLEFrame
{
public:
- RLEFrame() { NumberFragments = 0; }
+ RLEFrame() { NumberOfFragments = 0; }
void Print( std::ostream &os = std::cout, std::string indent = "" );
- void SetNumberOfFragments(unsigned int number) { NumberFragments = number; };
- unsigned int GetNumberOfFragments() { return NumberFragments; };
+ void SetNumberOfFragments(unsigned int number) { NumberOfFragments = number; };
+ unsigned int GetNumberOfFragments() { return NumberOfFragments; };
void SetOffset(unsigned int id, long offset);
long GetOffset(unsigned int id);
void SetLength(unsigned int id, long length);
long GetLength(unsigned int id);
+ uint8_t *ReadAndDecompressRLEFrame( uint8_t *subRaw,long rawSegmentSize,
+ std::ifstream *fp );
+ bool ReadAndDecompressRLEFragment( uint8_t *subRaw, long fragmentSize,
+ long rawSegmentSize, std::ifstream *fp );
+
private:
- unsigned int NumberFragments;
+ unsigned int NumberOfFragments;
long Offset[15];
long Length[15];
};
Program: gdcm
Module: $RCSfile: gdcmRLEFramesInfo.cxx,v $
Language: C++
- Date: $Date: 2005/01/31 05:24:21 $
- Version: $Revision: 1.9 $
+ Date: $Date: 2005/01/31 06:17:22 $
+ Version: $Revision: 1.10 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
* at which the pixel data should be copied
* @return Boolean
*/
-bool RLEFramesInfo::ReadAndDecompressRLEFile( std::ifstream *fp , uint8_t *raw, int xSize, int ySize, int zSize, int bitsAllocated )
+bool RLEFramesInfo::DecompressRLEFile( std::ifstream *fp , uint8_t *raw, int xSize, int ySize, int zSize, int bitsAllocated )
{
uint8_t *subRaw = raw;
- long RawSegmentSize = xSize * ySize;
+ long rawSegmentSize = xSize * ySize;
// Loop on the frame[s]
for(RLEFrameList::iterator it = Frames.begin(); it != Frames.end(); ++it)
{
- // Loop on the fragments
- for( unsigned int k = 1; k <= (*it)->GetNumberOfFragments(); k++ )
- {
- fp->seekg((*it)->GetOffset(k),std::ios::beg);
- ReadAndDecompressRLEFragment(subRaw,
- (*it)->GetLength(k),
- RawSegmentSize,
- fp);
- subRaw += RawSegmentSize;
- }
+ subRaw = (*it)->ReadAndDecompressRLEFrame( subRaw, rawSegmentSize, fp);
}
if ( bitsAllocated == 16 )
{
// Try to deal with RLE 16 Bits
- (void)DecompressRLE16BitsFromRLE8Bits( raw, xSize, ySize, zSize );
+ ConvertRLE16BitsFromRLE8Bits( raw, xSize, ySize, zSize );
}
return true;
}
-/**
- * \brief Implementation of the RLE decoding algorithm for decompressing
- * a RLE fragment. [refer to PS 3.5-2003, section G.3.2 p 86]
- * @param subRaw Sub region of \ref Raw where the decoded fragment
- * should be placed.
- * @param fragmentSize The length of the binary fragment as found on the disk.
- * @param RawSegmentSize The expected length of the fragment ONCE
- * Raw.
- * @param fp File Pointer: on entry the position should be the one of
- * the fragment to be decoded.
- */
-bool RLEFramesInfo::ReadAndDecompressRLEFragment( uint8_t *subRaw,
- long fragmentSize,
- long RawSegmentSize,
- std::ifstream *fp )
-{
- int8_t count;
- long numberOfOutputBytes = 0;
- long numberOfReadBytes = 0;
-
- while( numberOfOutputBytes < RawSegmentSize )
- {
- fp->read( (char*)&count, 1 );
- numberOfReadBytes += 1;
- if ( count >= 0 )
- // Note: count <= 127 comparison is always true due to limited range
- // of data type int8_t [since the maximum of an exact width
- // signed integer of width N is 2^(N-1) - 1, which for int8_t
- // is 127].
- {
- fp->read( (char*)subRaw, count + 1);
- numberOfReadBytes += count + 1;
- subRaw += count + 1;
- numberOfOutputBytes += count + 1;
- }
- else
- {
- if ( count <= -1 && count >= -127 )
- {
- int8_t newByte;
- fp->read( (char*)&newByte, 1);
- numberOfReadBytes += 1;
- for( int i = 0; i < -count + 1; i++ )
- {
- subRaw[i] = newByte;
- }
- subRaw += -count + 1;
- numberOfOutputBytes += -count + 1;
- }
- }
- // if count = 128 output nothing
-
- if ( numberOfReadBytes > fragmentSize )
- {
- gdcmVerboseMacro( "Read more bytes than the segment size.");
- return false;
- }
- }
- return true;
-}
-
/**
* \brief Try to deal with RLE 16 Bits.
* We assume the RLE has already been parsed and loaded in
* High Byte 'Planes'...(for what it may mean)
* @return Boolean
*/
-bool RLEFramesInfo::DecompressRLE16BitsFromRLE8Bits( uint8_t* raw, int xSize, int ySize,int numberOfFrames )
+bool RLEFramesInfo::ConvertRLE16BitsFromRLE8Bits( uint8_t* raw, int xSize,
+ int ySize,int numberOfFrames )
{
size_t pixelNumber = xSize * ySize;
size_t rawSize = xSize * ySize * numberOfFrames;
Program: gdcm
Module: $RCSfile: gdcmRLEFramesInfo.h,v $
Language: C++
- Date: $Date: 2005/01/31 05:24:22 $
- Version: $Revision: 1.16 $
+ Date: $Date: 2005/01/31 06:17:22 $
+ Version: $Revision: 1.17 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
public:
~RLEFramesInfo();
void Print( std::ostream &os = std::cout, std::string indent = "" );
- bool ReadAndDecompressRLEFile( std::ifstream *fp, uint8_t *subRaw, int xSize, int ySize, int zSize, int bitsAllocated );
- bool ReadAndDecompressRLEFragment(
- uint8_t *subDecompressed,
- long fragmentSize,
- long decompressedSegmentSize,
- std::ifstream *fp );
- bool DecompressRLE16BitsFromRLE8Bits( uint8_t* subRaw, int xSize, int ySize, int NumberOfFrames );
+ bool DecompressRLEFile( std::ifstream *fp, uint8_t *subRaw, int xSize, int ySize, int zSize, int bitsAllocated );
+ bool ConvertRLE16BitsFromRLE8Bits( uint8_t* subRaw, int xSize, int ySize, int NumberOfFrames );
void AddFrame(RLEFrame *frame);
projects / gdcm.git / commitdiff