ossimOpjJp2Reader.h

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//----------------------------------------------------------------------------
//
// License:  See top level LICENSE.txt file
//
// Author:  David Burken
//
// Description: OSSIM Open JPEG JP2 reader (tile source).
//
// http://www.openjpeg.org/
//
//----------------------------------------------------------------------------
// $Id$

#ifndef ossimOpjJp2Reader_HEADER
#define ossimOpjJp2Reader_HEADER 1

#include <ossim/imaging/ossimImageHandler.h>
#include <ossim/support_data/ossimJ2kSizRecord.h>
#include <vector>

// Forward class declarations.
class ossimImageData;
class ossimJ2kCodRecord;

class ossimOpjJp2Reader : public ossimImageHandler
{
public:

   enum
   {
      SIGNATURE_BOX_SIZE = 12,
      GEOTIFF_UUID_SIZE  = 16
   };
   
   enum ossimOpjJp2ReadMode
   {
      ossimOpjJp2ReadUnknown = 0
   };

   ossimOpjJp2Reader();

   virtual ~ossimOpjJp2Reader();

   virtual ossimString getShortName() const;

   virtual ossimString getLongName()  const;

   virtual ossimString getClassName()    const;

   virtual ossimRefPtr<ossimImageData> getTile(const ossimIrect& rect,
                                               ossim_uint32 resLevel=0);

   virtual ossim_uint32 getNumberOfInputBands() const;

   virtual ossim_uint32 getNumberOfOutputBands()const;

   virtual ossim_uint32 getNumberOfDecimationLevels()const;

   virtual ossim_uint32 getNumberOfLines(ossim_uint32 reduced_res_level = 0) const;

   virtual ossim_uint32 getNumberOfSamples(ossim_uint32 reduced_res_level = 0) const;

   virtual ossimIrect getImageRectangle(ossim_uint32 reduced_res_level = 0) const;

   virtual bool saveState(ossimKeywordlist& kwl,
                          const char* prefix=0)const;

   virtual bool loadState(const ossimKeywordlist& kwl,
                          const char* prefix=0);

   virtual ossimScalarType getOutputScalarType() const;

   virtual ossim_uint32 getImageTileWidth() const;

   virtual ossim_uint32 getImageTileHeight() const;

   virtual bool isOpen()const;

   virtual double getMaxPixelValue(ossim_uint32 band = 0)const;

   virtual bool open();

   virtual void close();

   virtual ossimRefPtr<ossimImageGeometry> getImageGeometry();

protected:
  virtual bool getOverviewTile(ossim_uint32 resLevel,
                               ossimImageData* result);   
      
private:

   virtual ossimRefPtr<ossimImageGeometry> getInternalImageGeometry();

   virtual ossimRefPtr<ossimImageGeometry> getImageGeometryFromGeotiffBox();

   virtual ossimRefPtr<ossimImageGeometry> getImageGeometryFromGmlBox();
   
   ossimRefPtr<ossimImageGeometry> getMetadataImageGeometry() const;

   // Cleans memory.  Called on close or destruct.
   void destroy();
   

   bool initSizRecord( std::istream* str,
                       ossimJ2kSizRecord& sizRecord) const;

   bool initCodRecord( std::istream* str,
                       ossimJ2kCodRecord& sizRecord) const;

   void allocate();

   ossimJ2kSizRecord m_sizRecord;
   
   ossimRefPtr<ossimImageData>  m_tile;
   ossimRefPtr<ossimImageData>  m_cacheTile;   
   std::ifstream*               m_str;
   ossim_uint32                 m_minDwtLevels;
   ossim_int32                  m_format; // OPJ_CODEC_FORMAT
   
TYPE_DATA
};

#endif