root/3rdparty/openexr/IlmImf/ImfB44Compressor.h

INCLUDED FROM

///////////////////////////////////////////////////////////////////////////
//
// 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
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// *       Redistributions in binary form must reproduce the above
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// distribution.
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// its contributors may be used to endorse or promote products derived
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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