ossimRpfCompressionSection Class Reference

#include <ossimRpfCompressionSection.h>

Public Member Functions
	ossimRpfCompressionSection ()
virtual	~ossimRpfCompressionSection ()
ossimErrorCode	parseStream (ossim::istream &in, ossimByteOrder byteOrder)
void	print (std::ostream &out) const
const std::vector< ossimRpfCompressionOffsetTableData > &	getTable () const
const ossimRpfCompressionSectionSubheader *	getSubheader () const

Private Member Functions
void	clearTable ()

Private Attributes
ossimRpfCompressionSectionSubheader *	theSubheader
ossim_uint32	theCompressionLookupOffsetTableOffset
ossim_uint16	theCompressionLookupTableOffsetRecordLength
std::vector< ossimRpfCompressionOffsetTableData >	theTable

Friends
std::ostream &	operator<< (std::ostream &out, const ossimRpfCompressionSection &data)

Detailed Description

Definition at line 27 of file ossimRpfCompressionSection.h.

Constructor & Destructor Documentation

ossimRpfCompressionSection()

ossimRpfCompressionSection::ossimRpfCompressionSection

(

)

Definition at line 102 of file ossimRpfCompressionSection.cpp.

References theSubheader.

   :theSubheader(NULL)
{
   theSubheader = new ossimRpfCompressionSectionSubheader;
}

~ossimRpfCompressionSection()

ossimRpfCompressionSection::~ossimRpfCompressionSection ( )

virtual

Definition at line 108 of file ossimRpfCompressionSection.cpp.

References theSubheader.

{
   if(theSubheader)
   {
      delete theSubheader;
      theSubheader = NULL;
   }
}

Member Function Documentation

clearTable()

void ossimRpfCompressionSection::clearTable ( )

private

getSubheader()

const ossimRpfCompressionSectionSubheader* ossimRpfCompressionSection::getSubheader ( ) const

inline

Definition at line 41 of file ossimRpfCompressionSection.h.

References theSubheader.

   {
      return theSubheader;
   }

getTable()

const std::vector<ossimRpfCompressionOffsetTableData>& ossimRpfCompressionSection::getTable ( ) const

inline

Definition at line 37 of file ossimRpfCompressionSection.h.

References theTable.

Referenced by ossimRpfCacheTileSource::fillSubTileCadrg(), ossimCibCadrgTileSource::fillSubTileCadrg(), ossimRpfCacheTileSource::fillSubTileCib(), and ossimCibCadrgTileSource::fillSubTileCib().

      {
         return theTable;
      }

parseStream()

ossimErrorCode ossimRpfCompressionSection::parseStream	(	ossim::istream &	in,
		ossimByteOrder	byteOrder
	)

Definition at line 117 of file ossimRpfCompressionSection.cpp.

References ossim::byteOrder(), ossimRpfCompressionLookupOffsetRecord::getCompressionLookupTableId(), ossimRpfCompressionLookupOffsetRecord::getCompressionLookupTableOffset(), ossimRpfCompressionLookupOffsetRecord::getCompressionLookupValueBitLength(), ossimRpfCompressionSectionSubheader::getEndOffset(), ossimRpfCompressionSectionSubheader::getNumberOfCompressionLookupOffsetRecords(), ossimRpfCompressionLookupOffsetRecord::getNumberOfCompressionLookupRecords(), ossimRpfCompressionLookupOffsetRecord::getNumberOfValuesPerCompressionLookupRecord(), ossimEndian::getSystemEndianType(), ossimErrorCodes::OSSIM_ERROR, ossimErrorCodes::OSSIM_OK, ossimRpfCompressionLookupOffsetRecord::parseStream(), ossimRpfCompressionSectionSubheader::parseStream(), size, ossimEndian::swap(), theCompressionLookupOffsetTableOffset, theCompressionLookupTableOffsetRecordLength, theSubheader, and theTable.

Referenced by ossimRpfHeader::getNewCompressionSection().

{
   ossimErrorCode result = ossimErrorCodes::OSSIM_OK;
   
   if(in&&theSubheader)
   {
      result = theSubheader->parseStream(in, byteOrder);

      if(result == ossimErrorCodes::OSSIM_OK)
      {
         ossimEndian anEndian;
         ossimRpfCompressionLookupOffsetRecord record;
         
         in.read((char*)&theCompressionLookupOffsetTableOffset, 4);
         in.read((char*)&theCompressionLookupTableOffsetRecordLength, 2);
         
         if(byteOrder != anEndian.getSystemEndianType())
         {
            anEndian.swap(theCompressionLookupOffsetTableOffset);
            anEndian.swap(theCompressionLookupTableOffsetRecordLength);
         }

         if(theSubheader->getNumberOfCompressionLookupOffsetRecords() > 0)
         {
            // clear the table
            theTable.clear();

            // resize it
            theTable.resize(theSubheader->getNumberOfCompressionLookupOffsetRecords());
            
            // now populate it
            for(long index = 0;
                index < theSubheader->getNumberOfCompressionLookupOffsetRecords();
                ++index)
            {
               record.parseStream(in, byteOrder);
               unsigned long rememberLocation = in.tellg();
               in.seekg(record.getCompressionLookupTableOffset()+
                        theSubheader->getEndOffset(), std::ios_base::beg);

               theTable[index].theTableId                            = record.getCompressionLookupTableId();
               theTable[index].theNumberOfLookupValues               = record.getNumberOfCompressionLookupRecords();
               theTable[index].theCompressionLookupValueBitLength    = record.getCompressionLookupValueBitLength();
               theTable[index].theNumberOfValuesPerLookup            = record.getNumberOfValuesPerCompressionLookupRecord();
               
               // store the information about this compress/decompress algorithm
               // I am not sure but I will assume that the bit length can be
               // arbitrary.  In other words if someone says that the bit length of
               // the lookup value is 12 this should be handled ok.
               //
               unsigned long size = (theTable[index].theNumberOfValuesPerLookup*
                                     theTable[index].theNumberOfLookupValues*
                                     theTable[index].theCompressionLookupValueBitLength)/8;
               
               theTable[index].theData = new unsigned char[size];

               in.read( (char*)theTable[index].theData, size);
               
               in.seekg(rememberLocation, std::ios_base::beg);
            }
         }
      }
   }
   else
   {
      result = ossimErrorCodes::OSSIM_ERROR;
   }

   return result;
}

print()

void ossimRpfCompressionSection::print

(

std::ostream &

out

)

const

Definition at line 189 of file ossimRpfCompressionSection.cpp.

References theSubheader, and theTable.

Referenced by operator<<().

{
   if(theSubheader)
   {
      out << *theSubheader << "\n";
      copy(theTable.begin(),
           theTable.end(),
           std::ostream_iterator<ossimRpfCompressionOffsetTableData>(out, "\n"));
   }
}

Friends And Related Function Documentation

operator<<

std::ostream& operator<< ( std::ostream &  out, const ossimRpfCompressionSection &  data  )

friend

Definition at line 95 of file ossimRpfCompressionSection.cpp.

{
   data.print(out);
   return out;
}

Member Data Documentation

theCompressionLookupOffsetTableOffset

ossim_uint32 ossimRpfCompressionSection::theCompressionLookupOffsetTableOffset

private

Definition at line 50 of file ossimRpfCompressionSection.h.

Referenced by parseStream().

theCompressionLookupTableOffsetRecordLength

ossim_uint16 ossimRpfCompressionSection::theCompressionLookupTableOffsetRecordLength

private

Definition at line 51 of file ossimRpfCompressionSection.h.

Referenced by parseStream().

theSubheader

ossimRpfCompressionSectionSubheader* ossimRpfCompressionSection::theSubheader

private

Definition at line 48 of file ossimRpfCompressionSection.h.

Referenced by getSubheader(), ossimRpfCompressionSection(), parseStream(), print(), and ~ossimRpfCompressionSection().

theTable

std::vector<ossimRpfCompressionOffsetTableData> ossimRpfCompressionSection::theTable

private

Definition at line 53 of file ossimRpfCompressionSection.h.

Referenced by getTable(), parseStream(), and print().

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

• ossimRpfCompressionSection.h
• ossimRpfCompressionSection.cpp