libopenraw
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00001 /* 00002 * libopenraw - crwdecompressor.h 00003 * 00004 * Copyright (C) 2007 Hubert Figuiere 00005 * 00006 * This library is free software: you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public License 00008 * as published by the Free Software Foundation, either version 3 of 00009 * the License, or (at your option) any later version. 00010 * 00011 * This library is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with this library. If not, see 00018 * <http://www.gnu.org/licenses/>. 00019 */ 00020 00021 #ifndef __OPENRAW_CRWDECOMPRESS_H__ 00022 #define __OPENRAW_CRWDECOMPRESS_H__ 00023 00024 #include <boost/noncopyable.hpp> 00025 00026 #include <libopenraw/libopenraw.h> 00027 00028 #include "decompressor.h" 00029 00030 namespace OpenRaw { 00031 00032 class RawData; 00033 00034 namespace IO { 00035 class Stream; 00036 } 00037 00038 namespace Internals { 00039 00040 class RawContainer; 00041 00042 class CrwDecompressor 00043 : public Decompressor 00044 { 00045 public: 00046 CrwDecompressor(IO::Stream * stream, 00047 RawContainer * container); 00048 virtual ~CrwDecompressor(); 00049 00057 virtual RawData *decompress(RawData *in = NULL); 00058 void setDecoderTable(uint32_t t) 00059 { m_table = t; } 00060 void setOutputDimensions(uint32_t x, uint32_t y) 00061 { m_height = y; m_width = x; } 00062 private: 00063 00064 struct decode_t { 00065 decode_t *branch[2]; 00066 int leaf; 00067 }; 00068 00069 uint32_t getbits(IO::Stream * s, int nbits); 00070 void make_decoder(decode_t *dest, const uint8_t *source, 00071 int level); 00072 void init_tables(uint32_t table_idx); 00073 00074 uint32_t m_table; 00075 uint32_t m_height, m_width; 00076 00077 decode_t m_first_decode[32]; 00078 decode_t m_second_decode[512]; 00079 // for make_decoder 00080 decode_t *m_free; /* Next unused node */ 00081 int m_leaf; /* no. of leaves already added */ 00082 // for getbits 00083 uint32_t m_bitbuf; 00084 int m_vbits; 00085 }; 00086 00087 } 00088 } 00089 00090 00091 #endif