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https://github.com/moses-smt/mosesdecoder.git
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153 lines
6.3 KiB
C++
153 lines
6.3 KiB
C++
// $Id$
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// vim:tabstop=2
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/***********************************************************************
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Moses - factored phrase-based language decoder
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Copyright (C) 2006 University of Edinburgh
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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***********************************************************************/
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#ifndef moses_PhraseDecoder_h
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#define moses_PhraseDecoder_h
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#include <sstream>
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#include <vector>
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#include <boost/unordered_map.hpp>
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#include <boost/unordered_set.hpp>
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#include <string>
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#include <iterator>
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#include <algorithm>
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#include <sys/stat.h>
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#include "moses/TypeDef.h"
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#include "moses/FactorCollection.h"
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#include "moses/Word.h"
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#include "moses/Util.h"
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#include "moses/InputFileStream.h"
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#include "moses/StaticData.h"
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#include "moses/WordsRange.h"
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#include "moses/UserMessage.h"
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#include "PhraseDictionaryCompact.h"
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#include "StringVector.h"
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#include "CanonicalHuffman.h"
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#include "TargetPhraseCollectionCache.h"
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namespace Moses
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{
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class PhraseDictionaryCompact;
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class PhraseDecoder
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{
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protected:
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friend class PhraseDictionaryCompact;
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typedef std::pair<unsigned char, unsigned char> AlignPoint;
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typedef std::pair<unsigned, unsigned> SrcTrg;
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enum Coding { None, REnc, PREnc } m_coding;
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size_t m_numScoreComponent;
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bool m_containsAlignmentInfo;
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size_t m_maxRank;
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size_t m_maxPhraseLength;
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boost::unordered_map<std::string, unsigned> m_sourceSymbolsMap;
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StringVector<unsigned char, unsigned, std::allocator> m_sourceSymbols;
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StringVector<unsigned char, unsigned, std::allocator> m_targetSymbols;
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std::vector<size_t> m_lexicalTableIndex;
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std::vector<SrcTrg> m_lexicalTable;
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CanonicalHuffman<unsigned>* m_symbolTree;
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bool m_multipleScoreTrees;
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std::vector<CanonicalHuffman<float>*> m_scoreTrees;
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CanonicalHuffman<AlignPoint>* m_alignTree;
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TargetPhraseCollectionCache m_decodingCache;
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PhraseDictionaryCompact& m_phraseDictionary;
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// ***********************************************
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const std::vector<FactorType>* m_input;
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const std::vector<FactorType>* m_output;
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const PhraseDictionaryFeature* m_feature;
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const std::vector<float>* m_weight;
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float m_weightWP;
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const LMList* m_languageModels;
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std::string m_separator;
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// ***********************************************
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unsigned GetSourceSymbolId(std::string& s);
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std::string GetTargetSymbol(unsigned id) const;
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size_t GetREncType(unsigned encodedSymbol);
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size_t GetPREncType(unsigned encodedSymbol);
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unsigned GetTranslation(unsigned srcIdx, size_t rank);
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size_t GetMaxSourcePhraseLength();
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unsigned DecodeREncSymbol1(unsigned encodedSymbol);
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unsigned DecodeREncSymbol2Rank(unsigned encodedSymbol);
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unsigned DecodeREncSymbol2Position(unsigned encodedSymbol);
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unsigned DecodeREncSymbol3(unsigned encodedSymbol);
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unsigned DecodePREncSymbol1(unsigned encodedSymbol);
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int DecodePREncSymbol2Left(unsigned encodedSymbol);
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int DecodePREncSymbol2Right(unsigned encodedSymbol);
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unsigned DecodePREncSymbol2Rank(unsigned encodedSymbol);
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std::string MakeSourceKey(std::string &);
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public:
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PhraseDecoder(
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PhraseDictionaryCompact &phraseDictionary,
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const std::vector<FactorType>* &input,
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const std::vector<FactorType>* &output,
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const PhraseDictionaryFeature* feature,
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size_t numScoreComponent,
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const std::vector<float>* weight,
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float weightWP,
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const LMList* languageModels
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);
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~PhraseDecoder();
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size_t Load(std::FILE* in);
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TargetPhraseVectorPtr CreateTargetPhraseCollection(const Phrase &sourcePhrase,
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bool topLevel = false);
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TargetPhraseVectorPtr DecodeCollection(TargetPhraseVectorPtr tpv,
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BitWrapper<> &encodedBitStream,
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const Phrase &sourcePhrase,
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bool topLevel);
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void PruneCache();
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};
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}
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#endif
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