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Diffstat (limited to 'kaldi_io/src/tools/openfst/include/fst/concat.h')
| -rw-r--r-- | kaldi_io/src/tools/openfst/include/fst/concat.h | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/kaldi_io/src/tools/openfst/include/fst/concat.h b/kaldi_io/src/tools/openfst/include/fst/concat.h deleted file mode 100644 index 8500d50..0000000 --- a/kaldi_io/src/tools/openfst/include/fst/concat.h +++ /dev/null @@ -1,246 +0,0 @@ -// concat.h - -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// Copyright 2005-2010 Google, Inc. -// Author: riley@google.com (Michael Riley) -// -// \file -// Functions and classes to compute the concat of two FSTs. - -#ifndef FST_LIB_CONCAT_H__ -#define FST_LIB_CONCAT_H__ - -#include <vector> -using std::vector; -#include <algorithm> - -#include <fst/mutable-fst.h> -#include <fst/rational.h> - - -namespace fst { - -// Computes the concatenation (product) of two FSTs. If FST1 -// transduces string x to y with weight a and FST2 transduces string w -// to v with weight b, then their concatenation transduces string xw -// to yv with Times(a, b). -// -// This version modifies its MutableFst argument (in first position). -// -// Complexity: -// - Time: O(V1 + V2 + E2) -// - Space: O(V1 + V2 + E2) -// where Vi = # of states and Ei = # of arcs of the ith FST. -// -template<class Arc> -void Concat(MutableFst<Arc> *fst1, const Fst<Arc> &fst2) { - typedef typename Arc::StateId StateId; - typedef typename Arc::Label Label; - typedef typename Arc::Weight Weight; - - // TODO(riley): restore when voice actions issues fixed - // Check that the symbol table are compatible - if (!CompatSymbols(fst1->InputSymbols(), fst2.InputSymbols()) || - !CompatSymbols(fst1->OutputSymbols(), fst2.OutputSymbols())) { - LOG(ERROR) << "Concat: input/output symbol tables of 1st argument " - << "do not match input/output symbol tables of 2nd argument"; - // fst1->SetProperties(kError, kError); - // return; - } - - uint64 props1 = fst1->Properties(kFstProperties, false); - uint64 props2 = fst2.Properties(kFstProperties, false); - - StateId start1 = fst1->Start(); - if (start1 == kNoStateId) { - if (props2 & kError) fst1->SetProperties(kError, kError); - return; - } - - StateId numstates1 = fst1->NumStates(); - if (fst2.Properties(kExpanded, false)) - fst1->ReserveStates(numstates1 + CountStates(fst2)); - - for (StateIterator< Fst<Arc> > siter2(fst2); - !siter2.Done(); - siter2.Next()) { - StateId s1 = fst1->AddState(); - StateId s2 = siter2.Value(); - fst1->SetFinal(s1, fst2.Final(s2)); - fst1->ReserveArcs(s1, fst2.NumArcs(s2)); - for (ArcIterator< Fst<Arc> > aiter(fst2, s2); - !aiter.Done(); - aiter.Next()) { - Arc arc = aiter.Value(); - arc.nextstate += numstates1; - fst1->AddArc(s1, arc); - } - } - - StateId start2 = fst2.Start(); - for (StateId s1 = 0; s1 < numstates1; ++s1) { - Weight final = fst1->Final(s1); - if (final != Weight::Zero()) { - fst1->SetFinal(s1, Weight::Zero()); - if (start2 != kNoStateId) - fst1->AddArc(s1, Arc(0, 0, final, start2 + numstates1)); - } - } - if (start2 != kNoStateId) - fst1->SetProperties(ConcatProperties(props1, props2), kFstProperties); -} - -// Computes the concatentation of two FSTs. This version modifies its -// MutableFst argument (in second position). -// -// Complexity: -// - Time: O(V1 + E1) -// - Space: O(V1 + E1) -// where Vi = # of states and Ei = # of arcs of the ith FST. -// -template<class Arc> -void Concat(const Fst<Arc> &fst1, MutableFst<Arc> *fst2) { - typedef typename Arc::StateId StateId; - typedef typename Arc::Label Label; - typedef typename Arc::Weight Weight; - - // Check that the symbol table are compatible - if (!CompatSymbols(fst1.InputSymbols(), fst2->InputSymbols()) || - !CompatSymbols(fst1.OutputSymbols(), fst2->OutputSymbols())) { - LOG(ERROR) << "Concat: input/output symbol tables of 1st argument " - << "do not match input/output symbol tables of 2nd argument"; - // fst2->SetProperties(kError, kError); - // return; - } - - uint64 props1 = fst1.Properties(kFstProperties, false); - uint64 props2 = fst2->Properties(kFstProperties, false); - - StateId start2 = fst2->Start(); - if (start2 == kNoStateId) { - if (props1 & kError) fst2->SetProperties(kError, kError); - return; - } - - StateId numstates2 = fst2->NumStates(); - if (fst1.Properties(kExpanded, false)) - fst2->ReserveStates(numstates2 + CountStates(fst1)); - - for (StateIterator< Fst<Arc> > siter(fst1); - !siter.Done(); - siter.Next()) { - StateId s1 = siter.Value(); - StateId s2 = fst2->AddState(); - Weight final = fst1.Final(s1); - fst2->ReserveArcs(s2, fst1.NumArcs(s1) + (final != Weight::Zero() ? 1 : 0)); - if (final != Weight::Zero()) - fst2->AddArc(s2, Arc(0, 0, final, start2)); - for (ArcIterator< Fst<Arc> > aiter(fst1, s1); - !aiter.Done(); - aiter.Next()) { - Arc arc = aiter.Value(); - arc.nextstate += numstates2; - fst2->AddArc(s2, arc); - } - } - StateId start1 = fst1.Start(); - fst2->SetStart(start1 == kNoStateId ? fst2->AddState() : start1 + numstates2); - if (start1 != kNoStateId) - fst2->SetProperties(ConcatProperties(props1, props2), kFstProperties); -} - - -// Computes the concatentation of two FSTs. This version modifies its -// RationalFst input (in first position). -template<class Arc> -void Concat(RationalFst<Arc> *fst1, const Fst<Arc> &fst2) { - fst1->GetImpl()->AddConcat(fst2, true); -} - -// Computes the concatentation of two FSTs. This version modifies its -// RationalFst input (in second position). -template<class Arc> -void Concat(const Fst<Arc> &fst1, RationalFst<Arc> *fst2) { - fst2->GetImpl()->AddConcat(fst1, false); -} - -typedef RationalFstOptions ConcatFstOptions; - - -// Computes the concatenation (product) of two FSTs; this version is a -// delayed Fst. If FST1 transduces string x to y with weight a and FST2 -// transduces string w to v with weight b, then their concatenation -// transduces string xw to yv with Times(a, b). -// -// Complexity: -// - Time: O(v1 + e1 + v2 + e2), -// - Space: O(v1 + v2) -// where vi = # of states visited and ei = # of arcs visited of the -// ith FST. Constant time and space to visit an input state or arc is -// assumed and exclusive of caching. -template <class A> -class ConcatFst : public RationalFst<A> { - public: - using ImplToFst< RationalFstImpl<A> >::GetImpl; - - typedef A Arc; - typedef typename A::Weight Weight; - typedef typename A::StateId StateId; - - ConcatFst(const Fst<A> &fst1, const Fst<A> &fst2) { - GetImpl()->InitConcat(fst1, fst2); - } - - ConcatFst(const Fst<A> &fst1, const Fst<A> &fst2, - const ConcatFstOptions &opts) : RationalFst<A>(opts) { - GetImpl()->InitConcat(fst1, fst2); - } - - // See Fst<>::Copy() for doc. - ConcatFst(const ConcatFst<A> &fst, bool safe = false) - : RationalFst<A>(fst, safe) {} - - // Get a copy of this ConcatFst. See Fst<>::Copy() for further doc. - virtual ConcatFst<A> *Copy(bool safe = false) const { - return new ConcatFst<A>(*this, safe); - } -}; - - -// Specialization for ConcatFst. -template <class A> -class StateIterator< ConcatFst<A> > : public StateIterator< RationalFst<A> > { - public: - explicit StateIterator(const ConcatFst<A> &fst) - : StateIterator< RationalFst<A> >(fst) {} -}; - - -// Specialization for ConcatFst. -template <class A> -class ArcIterator< ConcatFst<A> > : public ArcIterator< RationalFst<A> > { - public: - typedef typename A::StateId StateId; - - ArcIterator(const ConcatFst<A> &fst, StateId s) - : ArcIterator< RationalFst<A> >(fst, s) {} -}; - - -// Useful alias when using StdArc. -typedef ConcatFst<StdArc> StdConcatFst; - -} // namespace fst - -#endif // FST_LIB_CONCAT_H__ |