text: ///////////////////////////////////////////////////////////////////////////
  //
  // Copyright (c) 2006, Industrial Light & Magic, a division of Lucas
  // Digital Ltd. LLC
  // 
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
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  // notice, this list of conditions and the following disclaimer.
  // *       Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  // *       Neither the name of Industrial Light & Magic nor the names of
  // its contributors may be used to endorse or promote products derived
  // from this software without specific prior written permission. 
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  ///////////////////////////////////////////////////////////////////////////
  
  
  #ifndef INCLUDED_IMF_B44_COMPRESSOR_H
  #define INCLUDED_IMF_B44_COMPRESSOR_H
  
  //-----------------------------------------------------------------------------
  //
  //	class B44Compressor -- lossy compression of 4x4 pixel blocks
  //
  //-----------------------------------------------------------------------------
  
  #include <ImfCompressor.h>
  
  namespace Imf {
  
  class ChannelList;
  
  
  class B44Compressor: public Compressor
  {
    public:
  
      B44Compressor (const Header &hdr,
                     size_t maxScanLineSize,
  		   size_t numScanLines,
  		   bool optFlatFields);
  
      virtual ~B44Compressor ();
  
      virtual int		numScanLines () const;
  
      virtual Format	format () const;
  
      virtual int		compress (const char *inPtr,
  				  int inSize,
  				  int minY,
  				  const char *&outPtr);                  
                    
      virtual int		compressTile (const char *inPtr,
  				      int inSize,
  				      Imath::Box2i range,
  				      const char *&outPtr);
  
      virtual int		uncompress (const char *inPtr,
  				    int inSize,
  				    int minY,
  				    const char *&outPtr);
                      
      virtual int		uncompressTile (const char *inPtr,
  					int inSize,
  					Imath::Box2i range,
  					const char *&outPtr);
    private:
  
      struct ChannelData;
      
      int			compress (const char *inPtr,
  				  int inSize,
  				  Imath::Box2i range,
  				  const char *&outPtr);
   
      int			uncompress (const char *inPtr,
  				    int inSize,
  				    Imath::Box2i range,
  				    const char *&outPtr);
  
      int			_maxScanLineSize;
      bool		_optFlatFields;
      Format		_format;
      int			_numScanLines;
      unsigned short *	_tmpBuffer;
      char *		_outBuffer;
      int			_numChans;
      const ChannelList &	_channels;
      ChannelData *	_channelData;
      int			_minX;
      int			_maxX;
      int			_maxY;
  };
  
  
  } // namespace Imf
  
  #endif
  