1 2 // Licensed under the Apache License, Version 2.0 (the "License"); 3 // you may not use this file except in compliance with the License. 4 // You may obtain a copy of the License at 5 // 6 // http://www.apache.org/licenses/LICENSE-2.0 7 // 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 // 14 // Copyright 2005-2010 Google, Inc. 15 // Author: jpr (at) google.com (Jake Ratkiewicz) 16 17 #ifndef FST_SCRIPT_MAP_H_ 18 #define FST_SCRIPT_MAP_H_ 19 20 #include <fst/script/arg-packs.h> 21 #include <fst/script/fst-class.h> 22 #include <fst/script/weight-class.h> 23 #include <fst/arc-map.h> 24 #include <fst/state-map.h> 25 26 namespace fst { 27 namespace script { 28 29 template <class M> 30 Fst<typename M::ToArc> *ArcMap(const Fst<typename M::FromArc> &fst, 31 const M &mapper) { 32 typedef typename M::ToArc ToArc; 33 VectorFst<ToArc> *ofst = new VectorFst<ToArc>; 34 ArcMap(fst, ofst, mapper); 35 return ofst; 36 } 37 38 template <class M> 39 Fst<typename M::ToArc> *StateMap(const Fst<typename M::FromArc> &fst, 40 const M &mapper) { 41 typedef typename M::ToArc ToArc; 42 VectorFst<ToArc> *ofst = new VectorFst<ToArc>; 43 StateMap(fst, ofst, mapper); 44 return ofst; 45 } 46 47 enum MapType { ARC_SUM_MAPPER, IDENTITY_MAPPER, INVERT_MAPPER, PLUS_MAPPER, 48 QUANTIZE_MAPPER, RMWEIGHT_MAPPER, SUPERFINAL_MAPPER, 49 TIMES_MAPPER, TO_LOG_MAPPER, TO_LOG64_MAPPER, TO_STD_MAPPER }; 50 51 typedef args::Package<const FstClass&, MapType, float, 52 const WeightClass &> MapInnerArgs; 53 typedef args::WithReturnValue<FstClass*, MapInnerArgs> MapArgs; 54 55 template <class Arc> 56 void Map(MapArgs *args) { 57 const Fst<Arc> &ifst = *(args->args.arg1.GetFst<Arc>()); 58 MapType map_type = args->args.arg2; 59 float delta = args->args.arg3; 60 typename Arc::Weight w = *(args->args.arg4.GetWeight<typename Arc::Weight>()); 61 62 Fst<Arc> *fst = NULL; 63 Fst<LogArc> *lfst = NULL; 64 Fst<Log64Arc> *l64fst = NULL; 65 Fst<StdArc> *sfst = NULL; 66 if (map_type == ARC_SUM_MAPPER) { 67 args->retval = new FstClass(*(fst = 68 script::StateMap(ifst, ArcSumMapper<Arc>(ifst)))); 69 } else if (map_type == IDENTITY_MAPPER) { 70 args->retval = new FstClass(*(fst = 71 script::ArcMap(ifst, IdentityArcMapper<Arc>()))); 72 } else if (map_type == INVERT_MAPPER) { 73 args->retval = new FstClass(*(fst = 74 script::ArcMap(ifst, InvertWeightMapper<Arc>()))); 75 } else if (map_type == PLUS_MAPPER) { 76 args->retval = new FstClass(*(fst = 77 script::ArcMap(ifst, PlusMapper<Arc>(w)))); 78 } else if (map_type == QUANTIZE_MAPPER) { 79 args->retval = new FstClass(*(fst = 80 script::ArcMap(ifst, QuantizeMapper<Arc>(delta)))); 81 } else if (map_type == RMWEIGHT_MAPPER) { 82 args->retval = new FstClass(*(fst = 83 script::ArcMap(ifst, RmWeightMapper<Arc>()))); 84 } else if (map_type == SUPERFINAL_MAPPER) { 85 args->retval = new FstClass(*(fst = 86 script::ArcMap(ifst, SuperFinalMapper<Arc>()))); 87 } else if (map_type == TIMES_MAPPER) { 88 args->retval = new FstClass(*(fst = 89 script::ArcMap(ifst, TimesMapper<Arc>(w)))); 90 } else if (map_type == TO_LOG_MAPPER) { 91 args->retval = new FstClass(*(lfst = 92 script::ArcMap(ifst, WeightConvertMapper<Arc, LogArc>()))); 93 } else if (map_type == TO_LOG64_MAPPER) { 94 args->retval = new FstClass(*(l64fst = 95 script::ArcMap(ifst, WeightConvertMapper<Arc, Log64Arc>()))); 96 } else if (map_type == TO_STD_MAPPER) { 97 args->retval = new FstClass(*(sfst = 98 script::ArcMap(ifst, WeightConvertMapper<Arc, StdArc>()))); 99 } else { 100 FSTERROR() << "Error: unknown/unsupported mapper type: " 101 << map_type; 102 VectorFst<Arc> *ofst = new VectorFst<Arc>; 103 ofst->SetProperties(kError, kError); 104 args->retval = new FstClass(*(fst =ofst)); 105 } 106 delete sfst; 107 delete l64fst; 108 delete lfst; 109 delete fst; 110 } 111 112 113 #ifdef SWIG 114 %newobject Map; 115 #endif 116 FstClass *Map(const FstClass& f, MapType map_type, 117 float delta = fst::kDelta, 118 const WeightClass &w = fst::script::WeightClass::Zero()); 119 120 } // namespace script 121 } // namespace fst 122 123 #endif // FST_SCRIPT_MAP_H_ 124
