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 47 namespace Imf { 48 49 class ChannelList; 50 51 52 class 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