void ossimOpenJpegNitfReader::initializeReadMode()
{
// Initialize the read mode.
theReadMode = READ_MODE_UNKNOWN;
const ossimNitfImageHeader* hdr = getCurrentImageHeader();
if (!hdr)
{
return;
}
if ( (hdr->getIMode() == "B") && (hdr->getCompressionCode()== "C8") )
{
theReadMode = READ_JPEG_BLOCK;
}
}
bool ossimQuickbirdNitfTileSource::open()
{
if(traceDebug())
{
ossimNotify(ossimNotifyLevel_DEBUG)
<< "ossimQuickbirdNitfTileSource::open(file) DEBUG: entered ..."
<< std::endl;
}
ossimFilename file = theImageFile;
file = file.replaceAllThatMatch("_R[0-9]+C[0-9]+");
ossimQuickbirdTile tileFile;
bool openedTileFile = false;
file.setExtension("TIL");
if(!tileFile.open(file))
{
file.setExtension("TIL");
if(tileFile.open(file))
{
openedTileFile = true;
}
else
{
file.setExtension("til");
if(tileFile.open(file))
{
openedTileFile = true;
}
}
}
else
{
openedTileFile = true;
}
if(openedTileFile)
{
if(traceDebug())
{
ossimNotify(ossimNotifyLevel_DEBUG)
<< "ossimQuickbirdNitfTileSource::open(file) DEBUG:"
<< "\nOpened tile file" << std::endl;
}
// Call the base class open...
if(!ossimNitfTileSource::open())
{
return false;
}
ossimQuickbirdTileInfo info;
ossimIrect tempBounds = getCurrentImageHeader()->getImageRect();
tempBounds = ossimIrect(0,
0,
tempBounds.width() - 1,
tempBounds.height() - 1);
if(traceDebug())
{
ossimNotify(ossimNotifyLevel_DEBUG)
<< "ossimQuickbirdNitfTileSource::open(file) DEBUG:"
<< "\nheader rectangle = " << tempBounds << std::endl;
}
ossimIpt ulPt;
ossimIpt urPt;
ossimIpt lrPt;
ossimIpt llPt;
ossimDpt shift;
if(tileFile.getInfo(info, theImageFile.file().upcase()))
{
ulPt.makeNan();
urPt.makeNan();
lrPt.makeNan();
llPt.makeNan();
if((info.theUlXOffset != OSSIM_INT_NAN) &&
(info.theUlYOffset != OSSIM_INT_NAN))
{
shift = ossimIpt(info.theUlXOffset, info.theUlYOffset);
}
else
{
shift = ossimIpt(0,0);
}
m_transform = new ossim2dTo2dShiftTransform(shift);
}
if(traceDebug())
{
ossimNotify(ossimNotifyLevel_DEBUG)
<< "ossimQuickbirdNitfTileSource::open(file) DEBUG:"
<< "\nUl = " << ulPt
<< "\nUr = " << urPt
<< "\nLr = " << lrPt
<< "\nLl = " << llPt
<< "\ntheImageRect: " << getImageRectangle(0)
<< "\nExiting..."
<< std::endl;
}
}
else
{
if(traceDebug())
{
ossimNotify(ossimNotifyLevel_DEBUG)
<< "ossimQuickbirdNitfTileSource::open(file) DEBUG"
<< "Not opened..."
<< std::endl;
}
}
return openedTileFile;
}
bool ossimOpenJpegNitfReader::scanForJpegBlockOffsets()
{
const ossimNitfImageHeader* hdr = getCurrentImageHeader();
if ( !hdr || (theReadMode != READ_JPEG_BLOCK) || !theFileStr )
{
return false;
}
theNitfBlockOffset.clear();
theNitfBlockSize.clear();
//---
// NOTE:
// SOC = 0xff4f Start of Codestream
// SOT = 0xff90 Start of tile
// SOD = 0xff93 Last marker in each tile
// EOC = 0xffd9 End of Codestream
//---
char c;
// Seek to the first block.
theFileStr.seekg(hdr->getDataLocation(), ios::beg);
if (theFileStr.fail())
{
return false;
}
// Read the first two bytes and verify it is SOC; if not, get out.
theFileStr.get( c );
if (static_cast<ossim_uint8>(c) != 0xff)
{
return false;
}
theFileStr.get(c);
if (static_cast<ossim_uint8>(c) != 0x4f)
{
return false;
}
ossim_uint32 blockSize = 2; // Read two bytes...
// Add the first offset.
// theNitfBlockOffset.push_back(hdr->getDataLocation());
// Find all the SOC markers.
while ( theFileStr.get(c) )
{
++blockSize;
if (static_cast<ossim_uint8>(c) == 0xff)
{
if ( theFileStr.get(c) )
{
++blockSize;
if (static_cast<ossim_uint8>(c) == 0x90) // At SOC marker...
{
std::streamoff pos = theFileStr.tellg();
theNitfBlockOffset.push_back(pos-2);
}
else if (static_cast<ossim_uint8>(c) == 0x93) // At EOC marker...
{
// Capture the size of this block.
theNitfBlockSize.push_back(blockSize);
blockSize = 0;
}
}
}
}
theFileStr.seekg(0, ios::beg);
theFileStr.clear();
// We should have the same amount of offsets as we do blocks...
ossim_uint32 total_blocks =
hdr->getNumberOfBlocksPerRow()*hdr->getNumberOfBlocksPerCol();
if (theNitfBlockOffset.size() != total_blocks)
{
if (traceDebug())
{
ossimNotify(ossimNotifyLevel_WARN)
<< "DEBUG:"
<< "\nBlock offset count wrong!"
<< "\nblocks: " << total_blocks
<< "\noffsets: " << theNitfBlockOffset.size()
<< std::endl;
}
return false;
}
if (theNitfBlockSize.size() != total_blocks)
{
if (traceDebug())
{
ossimNotify(ossimNotifyLevel_WARN)
<< "DEBUG:"
<< "\nBlock size count wrong!"
<< "\nblocks: " << total_blocks
<< "\nblock size array: " << theNitfBlockSize.size()
<< std::endl;
}
return false;
}
return true;
}
