///////////////////////////////////////////////////////////////////////////

//

// 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:

// *       Redistributions of source code must retain the above copyright

// 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.

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// from this software without specific prior written permission. 

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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"

#include "ImfNamespace.h"

#include "ImfExport.h"

#include "ImfForward.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

class IMF_EXPORT 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_NAMESPACE::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_NAMESPACE::Box2i range,

					const char *&outPtr);

  private:

    struct ChannelData;

    int			compress (const char *inPtr,

				  int inSize,

				  IMATH_NAMESPACE::Box2i range,

				  const char *&outPtr);

    int			uncompress (const char *inPtr,

				    int inSize,

				    IMATH_NAMESPACE::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;

};

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif