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ImfPizCompressor.h

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
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// All rights reserved.
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// *       Redistributions in binary form must reproduce the above
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// its contributors may be used to endorse or promote products derived
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#ifndef INCLUDED_IMF_PIZ_COMPRESSOR_H
#define INCLUDED_IMF_PIZ_COMPRESSOR_H

//-----------------------------------------------------------------------------
//
//    class PizCompressor -- uses Wavelet and Huffman encoding.
//
//-----------------------------------------------------------------------------

#include <ImfCompressor.h>

namespace Imf {

class ChannelList;


00052 class PizCompressor: public Compressor
{
  public:

    PizCompressor (const Header &hdr, int maxScanLineSize, int numScanLines);
    virtual ~PizCompressor ();

    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;
    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

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