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-rw-r--r--decoder/ff_lm.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/decoder/ff_lm.h b/decoder/ff_lm.h
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+++ b/decoder/ff_lm.h
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+#ifndef _LM_FF_H_
+#define _LM_FF_H_
+
+#include <vector>
+#include <string>
+
+#include "hg.h"
+#include "ff.h"
+#include "config.h"
+
+class LanguageModelImpl;
+
+class LanguageModel : public FeatureFunction {
+ public:
+ // param = "filename.lm [-o n]"
+ LanguageModel(const std::string& param);
+ ~LanguageModel();
+ virtual void FinalTraversalFeatures(const void* context,
+ SparseVector<double>* features) const;
+ std::string DebugStateToString(const void* state) const;
+ protected:
+ virtual void TraversalFeaturesImpl(const SentenceMetadata& smeta,
+ const Hypergraph::Edge& edge,
+ const std::vector<const void*>& ant_contexts,
+ SparseVector<double>* features,
+ SparseVector<double>* estimated_features,
+ void* out_context) const;
+ private:
+ const int fid_;
+ mutable LanguageModelImpl* pimpl_;
+};
+
+#ifdef HAVE_RANDLM
+class LanguageModelRandLM : public FeatureFunction {
+ public:
+ // param = "filename.lm [-o n]"
+ LanguageModelRandLM(const std::string& param);
+ ~LanguageModelRandLM();
+ virtual void FinalTraversalFeatures(const void* context,
+ SparseVector<double>* features) const;
+ std::string DebugStateToString(const void* state) const;
+ protected:
+ virtual void TraversalFeaturesImpl(const SentenceMetadata& smeta,
+ const Hypergraph::Edge& edge,
+ const std::vector<const void*>& ant_contexts,
+ SparseVector<double>* features,
+ SparseVector<double>* estimated_features,
+ void* out_context) const;
+ private:
+ const int fid_;
+ mutable LanguageModelImpl* pimpl_;
+};
+#endif
+
+#endif