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author | clone2727 | 2011-07-18 16:04:39 -0700 |
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committer | clone2727 | 2011-07-18 16:04:39 -0700 |
commit | 6370984b2238f90aa3e03ac70725b3cfc671d581 (patch) | |
tree | 031784ab3bfc44bff048e3b4d9b9e1e969a22af8 /common/huffman.h | |
parent | 85a056f3824151e4f1838de2ca3aeb7e824c32b8 (diff) | |
parent | 26d15ce675447070ed5ba99a3b21253b1a4459f7 (diff) | |
download | scummvm-rg350-6370984b2238f90aa3e03ac70725b3cfc671d581.tar.gz scummvm-rg350-6370984b2238f90aa3e03ac70725b3cfc671d581.tar.bz2 scummvm-rg350-6370984b2238f90aa3e03ac70725b3cfc671d581.zip |
Merge pull request #50 from clone2727/bink
Add support for Bink video to SCUMM HE
Diffstat (limited to 'common/huffman.h')
-rw-r--r-- | common/huffman.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/common/huffman.h b/common/huffman.h new file mode 100644 index 0000000000..9a8b712c23 --- /dev/null +++ b/common/huffman.h @@ -0,0 +1,82 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +// Based on eos' Huffman code + +#ifndef COMMON_HUFFMAN_H +#define COMMON_HUFFMAN_H + +#include "common/array.h" +#include "common/list.h" +#include "common/types.h" + +namespace Common { + +class BitStream; + +/** + * Huffman bitstream decoding + * + * Used in engines: + * - scumm + */ +class Huffman { +public: + /** Construct a Huffman decoder. + * + * @param maxLength Maximal code length. If 0, it's searched for. + * @param codeCount Number of codes. + * @param codes The actual codes. + * @param lengths Lengths of the individual codes. + * @param symbols The symbols. If 0, assume they are identical to the code indices. + */ + Huffman(uint8 maxLength, uint32 codeCount, const uint32 *codes, const uint8 *lengths, const uint32 *symbols = 0); + ~Huffman(); + + /** Modify the codes' symbols. */ + void setSymbols(const uint32 *symbols = 0); + + /** Return the next symbol in the bitstream. */ + uint32 getSymbol(BitStream &bits) const; + +private: + struct Symbol { + uint32 code; + uint32 symbol; + + Symbol(uint32 c, uint32 s); + }; + + typedef Common::List<Symbol> CodeList; + typedef Common::Array<CodeList> CodeLists; + typedef Common::Array<Symbol *> SymbolList; + + /** Lists of codes and their symbols, sorted by code length. */ + CodeLists _codes; + + /** Sorted list of pointers to the symbols. */ + SymbolList _symbols; +}; + +} // End of namespace Common + +#endif // COMMON_HUFFMAN_H |