1///////////////////////////////////////////////////////////////////////////
2//
3// Copyright (c) 2006, Industrial Light & Magic, a division of Lucas
4// Digital Ltd. LLC
5//
6// All rights reserved.
7//
8// Redistribution and use in source and binary forms, with or without
9// modification, are permitted provided that the following conditions are
10// met:
11// *       Redistributions of source code must retain the above copyright
12// notice, this list of conditions and the following disclaimer.
13// *       Redistributions in binary form must reproduce the above
14// copyright notice, this list of conditions and the following disclaimer
15// in the documentation and/or other materials provided with the
16// distribution.
17// *       Neither the name of Industrial Light & Magic nor the names of
18// its contributors may be used to endorse or promote products derived
19// from this software without specific prior written permission.
20//
21// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32//
33///////////////////////////////////////////////////////////////////////////
34
35
36#ifndef INCLUDED_IMF_B44_COMPRESSOR_H
37#define INCLUDED_IMF_B44_COMPRESSOR_H
38
39//-----------------------------------------------------------------------------
40//
41//	class B44Compressor -- lossy compression of 4x4 pixel blocks
42//
43//-----------------------------------------------------------------------------
44
45#include <ImfCompressor.h>
46
47namespace Imf {
48
49class ChannelList;
50
51
52class B44Compressor: public Compressor
53{
54  public:
55
56    B44Compressor (const Header &hdr,
57                   size_t maxScanLineSize,
58           size_t numScanLines,
59           bool optFlatFields);
60
61    virtual ~B44Compressor ();
62
63    virtual int		numScanLines () const;
64
65    virtual Format	format () const;
66
67    virtual int		compress (const char *inPtr,
68                  int inSize,
69                  int minY,
70                  const char *&outPtr);
71
72    virtual int		compressTile (const char *inPtr,
73                      int inSize,
74                      Imath::Box2i range,
75                      const char *&outPtr);
76
77    virtual int		uncompress (const char *inPtr,
78                    int inSize,
79                    int minY,
80                    const char *&outPtr);
81
82    virtual int		uncompressTile (const char *inPtr,
83                    int inSize,
84                    Imath::Box2i range,
85                    const char *&outPtr);
86  private:
87
88    struct ChannelData;
89
90    int			compress (const char *inPtr,
91                  int inSize,
92                  Imath::Box2i range,
93                  const char *&outPtr);
94
95    int			uncompress (const char *inPtr,
96                    int inSize,
97                    Imath::Box2i range,
98                    const char *&outPtr);
99
100    int			_maxScanLineSize;
101    bool		_optFlatFields;
102    Format		_format;
103    int			_numScanLines;
104    unsigned short *	_tmpBuffer;
105    char *		_outBuffer;
106    int			_numChans;
107    const ChannelList &	_channels;
108    ChannelData *	_channelData;
109    int			_minX;
110    int			_maxX;
111    int			_maxY;
112};
113
114
115} // namespace Imf
116
117#endif
118