/usr/include/casacore/images/Images/MIRIADImage.h is in casacore-dev 2.2.0-2.
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//# Copyright (C) 2001
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef IMAGES_MIRIADIMAGE_H
#define IMAGES_MIRIADIMAGE_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/images/Images/ImageInterface.h>
#include <casacore/images/Images/MaskSpecifier.h>
#include <casacore/tables/DataMan/TiledFileAccess.h>
#include <casacore/lattices/Lattices/TiledShape.h>
#include <casacore/casa/Containers/Record.h>
#include <casacore/casa/BasicSL/String.h>
#include <casacore/casa/Utilities/DataType.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward Declarations
template <class T> class Array;
template <class T> class Lattice;
//
class MaskSpecifier;
class IPosition;
class Slicer;
class CoordinateSystem;
class FITSMask;
class FitsInput;
// <summary>
// Class providing native access to MIRIAD images.
// </summary>
// <use visibility=export>
// <reviewed reviewer="" date="" tests="tMIRIADImage.cc">
// </reviewed>
// <prerequisite>
// <li> <linkto class=ImageInterface>ImageInterface</linkto>
// <li> <linkto class=FITSMask>FITSMask</linkto>
// </prerequisite>
// <etymology>
// This class provides native access to MIRIAD images.
// </etymology>
// <synopsis>
// A MIRIADImage provides native access to MIRIAD images by accessing them
// with the TiledFileAccess class. -- or -- the native miriad I/O routines.
// The MIRIADImage is read only. -- really -- ??
//
// </synopsis>
// <example>
// <srcblock>
// MIRIADImage im("cube1");
// LogIO logger(or);
// ImageStatistics<Float> stats(im, logger);
// Bool ok = stats.display(); // Display statistics
// </srcblock>
// </example>
// <motivation>
// This provides native access to MIRIAD images.
// </motivation>
//# <todo asof="2001/09/10">
//# </todo>
class MIRIADImage: public ImageInterface<Float>
{
public:
// Construct a MIRIADImage from the disk MIRIAD dataset name and apply mask.
explicit MIRIADImage(const String& name);
// Construct a MIRIADImage from the disk MIRIAD file name and apply mask or not.
MIRIADImage(const String& name, const MaskSpecifier&);
// Copy constructor (reference semantics)
MIRIADImage(const MIRIADImage& other);
// Destructor does nothing
~MIRIADImage();
// Assignment (reference semantics)
MIRIADImage& operator=(const MIRIADImage& other);
// Function to open a MIRIAD image.
static LatticeBase* openMIRIADImage (const String& name,
const MaskSpecifier&);
// Register the open function.
static void registerOpenFunction();
//# ImageInterface virtual functions
// Make a copy of the object with new (reference semantics).
virtual ImageInterface<Float>* cloneII() const;
// Get the image type (returns MIRIADImage).
virtual String imageType() const;
// Function which changes the shape of the MIRIADImage.
// Throws an exception as MIRIADImage is not writable.
virtual void resize(const TiledShape& newShape);
// Functions which get and set the units associated with the image
// pixels (i.e. the "brightness" unit). Initially the unit is empty.
// Although the MIRIADimage is not writable, you can change the
// unit in the MIRIADImage object, but it will not be changed
// in the MIRIAD disk file.
// <group>
#if 0
virtual Bool setUnits(const Unit& newUnits);
virtual Unit units() const;
#endif
// </group>
// Often we have miscellaneous information we want to attach to an image.
// Although MIRIADImage is not writable, you can set a new
// MiscInfo record, but it will not be stored with the MIRIAD file
// <group>
virtual const RecordInterface &miscInfo() const;
virtual Bool setMiscInfo(const RecordInterface &newInfo);
// </group>
//# MaskedLattice virtual functions
// Has the object really a mask? The MIRIADImage always
// has a pixel mask and never has a region mask so this
// should always return True
virtual Bool isMasked() const;
// MIRIADimage always has a pixel mask so should return True
virtual Bool hasPixelMask() const;
// Get access to the pixelmask. MIRIADImage always has a pixel mask.
// <group>
virtual const Lattice<Bool>& pixelMask() const;
virtual Lattice<Bool>& pixelMask();
// </group>
// Do the actual get of the mask data. The return value is always
// False, thus the buffer does not reference another array.
virtual Bool doGetMaskSlice (Array<Bool>& buffer, const Slicer& section);
// Get the region used. There is no region.
// Always returns 0.
virtual const LatticeRegion* getRegionPtr() const;
//# Lattice virtual functions
// Do the actual get of the data.
// Returns False as the data do not reference another Array
virtual Bool doGetSlice (Array<Float>& buffer, const Slicer& theSlice);
// The MIRIADImage is not writable, so this throws an exception.
virtual void doPutSlice (const Array<Float>& sourceBuffer,
const IPosition& where,
const IPosition& stride);
//# LatticeBase virtual functions
// The lattice is paged to disk.
virtual Bool isPaged() const;
// The lattice is persistent.
virtual Bool isPersistent() const;
// The MIRIADImage is not writable.
virtual Bool isWritable() const;
// Returns the name of the disk file.
virtual String name (Bool stripPath=False) const;
// return the shape of the MIRIADImage
virtual IPosition shape() const;
// Returns the maximum recommended number of pixels for a cursor. This is
// the number of pixels in a tile.
virtual uInt advisedMaxPixels() const;
// Help the user pick a cursor for most efficient access if they only want
// pixel values and don't care about the order or dimension of the
// cursor.
virtual IPosition doNiceCursorShape (uInt maxPixels) const;
// Temporarily close the image.
virtual void tempClose();
// Reopen a temporarily closed image.
virtual void reopen();
// Check class invariants.
virtual Bool ok() const;
// Return the (internal) data type (TpFloat or TpShort).
DataType dataType () const
{ return dataType_p; }
// Maximum size - not necessarily all used. In pixels.
virtual uInt maximumCacheSize() const;
// Set the maximum (allowed) cache size as indicated.
virtual void setMaximumCacheSize (uInt howManyPixels);
// Set the cache size as to "fit" the indicated path.
virtual void setCacheSizeFromPath (const IPosition& sliceShape,
const IPosition& windowStart,
const IPosition& windowLength,
const IPosition& axisPath);
// Set the actual cache size for this Array to be be big enough for the
// indicated number of tiles. This cache is not shared with PagedArrays
// in other rows and is always clipped to be less than the maximum value
// set using the setMaximumCacheSize member function.
// tiles. Tiles are cached using a first in first out algorithm.
virtual void setCacheSizeInTiles (uInt howManyTiles);
// Clears and frees up the caches, but the maximum allowed cache size is
// unchanged from when setCacheSize was called
virtual void clearCache();
// Report on cache success.
virtual void showCacheStatistics (ostream& os) const;
private:
String name_p; // filename, as given
Int tno_p; // miriad file handle
MaskSpecifier maskSpec_p;
Unit unit_p;
Record rec_p;
CountedPtr<TiledFileAccess> pTiledFile_p;
Lattice<Bool>* pPixelMask_p;
// Float scale_p;
// Float offset_p;
// Short magic_p;
TiledShape shape_p;
Bool hasBlanks_p;
DataType dataType_p; // always float's for miriad
Int64 fileOffset_p; // always 4 for direct (tiled) access
Bool isClosed_p;
// Reopen the image if needed.
void reopenIfNeeded() const
{ if (isClosed_p) const_cast<MIRIADImage*>(this)->reopen(); }
// Setup the object (used by constructors).
void setup();
// Open the image (used by setup and reopen).
void open();
// Fish things out of the MIRIAD file
void getImageAttributes (CoordinateSystem& cSys,
IPosition& shape, ImageInfo& info,
Unit& brightnessUnit, Record& miscInfo,
Bool& hasBlanks, const String& name);
// <group>
void crackHeader (CoordinateSystem& cSys,
IPosition& shape, ImageInfo& imageInfo,
Unit& brightnessUnit, Record& miscInfo,
LogIO&os);
// </group>
};
} //# NAMESPACE CASACORE - END
#endif
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