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// $Id$
// vim:tabstop=2
/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2006 University of Edinburgh
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
***********************************************************************/
#ifndef moses_PhraseDecoder_h
#define moses_PhraseDecoder_h
#include <sstream>
#include <vector>
#include <boost/unordered_map.hpp>
#include <boost/unordered_set.hpp>
#include <string>
#include <iterator>
#include <algorithm>
#include <sys/stat.h>
#include "moses/TypeDef.h"
#include "moses/FactorCollection.h"
#include "moses/Word.h"
#include "moses/Util.h"
#include "moses/InputFileStream.h"
#include "moses/StaticData.h"
#include "moses/WordsRange.h"
#include "moses/UserMessage.h"
#include "PhraseDictionaryCompact.h"
#include "StringVector.h"
#include "CanonicalHuffman.h"
#include "TargetPhraseCollectionCache.h"
namespace Moses
{
class PhraseDictionaryCompact;
class PhraseDecoder
{
protected:
friend class PhraseDictionaryCompact;
typedef std::pair<unsigned char, unsigned char> AlignPoint;
typedef std::pair<unsigned, unsigned> SrcTrg;
enum Coding { None, REnc, PREnc } m_coding;
size_t m_numScoreComponent;
bool m_containsAlignmentInfo;
size_t m_maxRank;
size_t m_maxPhraseLength;
boost::unordered_map<std::string, unsigned> m_sourceSymbolsMap;
StringVector<unsigned char, unsigned, std::allocator> m_sourceSymbols;
StringVector<unsigned char, unsigned, std::allocator> m_targetSymbols;
std::vector<size_t> m_lexicalTableIndex;
std::vector<SrcTrg> m_lexicalTable;
CanonicalHuffman<unsigned>* m_symbolTree;
bool m_multipleScoreTrees;
std::vector<CanonicalHuffman<float>*> m_scoreTrees;
CanonicalHuffman<AlignPoint>* m_alignTree;
TargetPhraseCollectionCache m_decodingCache;
PhraseDictionaryCompact& m_phraseDictionary;
// ***********************************************
const std::vector<FactorType>* m_input;
const std::vector<FactorType>* m_output;
const std::vector<float>* m_weight;
std::string m_separator;
// ***********************************************
unsigned GetSourceSymbolId(std::string& s);
std::string GetTargetSymbol(unsigned id) const;
size_t GetREncType(unsigned encodedSymbol);
size_t GetPREncType(unsigned encodedSymbol);
unsigned GetTranslation(unsigned srcIdx, size_t rank);
size_t GetMaxSourcePhraseLength();
unsigned DecodeREncSymbol1(unsigned encodedSymbol);
unsigned DecodeREncSymbol2Rank(unsigned encodedSymbol);
unsigned DecodeREncSymbol2Position(unsigned encodedSymbol);
unsigned DecodeREncSymbol3(unsigned encodedSymbol);
unsigned DecodePREncSymbol1(unsigned encodedSymbol);
int DecodePREncSymbol2Left(unsigned encodedSymbol);
int DecodePREncSymbol2Right(unsigned encodedSymbol);
unsigned DecodePREncSymbol2Rank(unsigned encodedSymbol);
std::string MakeSourceKey(std::string &);
public:
PhraseDecoder(
PhraseDictionaryCompact &phraseDictionary,
const std::vector<FactorType>* input,
const std::vector<FactorType>* output,
size_t numScoreComponent,
const std::vector<float>* weight
);
~PhraseDecoder();
size_t Load(std::FILE* in);
TargetPhraseVectorPtr CreateTargetPhraseCollection(const Phrase &sourcePhrase,
bool topLevel = false);
TargetPhraseVectorPtr DecodeCollection(TargetPhraseVectorPtr tpv,
BitWrapper<> &encodedBitStream,
const Phrase &sourcePhrase,
bool topLevel);
void PruneCache();
};
}
#endif
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