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@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>
ArcMap(const Fst<typename M::FromArc> & fst,const M & mapper)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>
StateMap(const Fst<typename M::FromArc> & fst,const M & mapper)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>
Map(MapArgs * args)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 if (map_type == ARC_SUM_MAPPER) {
63 args->retval = new FstClass(
64 script::StateMap(ifst, ArcSumMapper<Arc>(ifst)));
65 } else if (map_type == IDENTITY_MAPPER) {
66 args->retval = new FstClass(
67 script::ArcMap(ifst, IdentityArcMapper<Arc>()));
68 } else if (map_type == INVERT_MAPPER) {
69 args->retval = new FstClass(
70 script::ArcMap(ifst, InvertWeightMapper<Arc>()));
71 } else if (map_type == PLUS_MAPPER) {
72 args->retval = new FstClass(
73 script::ArcMap(ifst, PlusMapper<Arc>(w)));
74 } else if (map_type == QUANTIZE_MAPPER) {
75 args->retval = new FstClass(
76 script::ArcMap(ifst, QuantizeMapper<Arc>(delta)));
77 } else if (map_type == RMWEIGHT_MAPPER) {
78 args->retval = new FstClass(
79 script::ArcMap(ifst, RmWeightMapper<Arc>()));
80 } else if (map_type == SUPERFINAL_MAPPER) {
81 args->retval = new FstClass(
82 script::ArcMap(ifst, SuperFinalMapper<Arc>()));
83 } else if (map_type == TIMES_MAPPER) {
84 args->retval = new FstClass(
85 script::ArcMap(ifst, TimesMapper<Arc>(w)));
86 } else if (map_type == TO_LOG_MAPPER) {
87 args->retval = new FstClass(
88 script::ArcMap(ifst, WeightConvertMapper<Arc, LogArc>()));
89 } else if (map_type == TO_LOG64_MAPPER) {
90 args->retval = new FstClass(
91 script::ArcMap(ifst, WeightConvertMapper<Arc, Log64Arc>()));
92 } else if (map_type == TO_STD_MAPPER) {
93 args->retval = new FstClass(
94 script::ArcMap(ifst, WeightConvertMapper<Arc, StdArc>()));
95 } else {
96 FSTERROR() << "Error: unknown/unsupported mapper type: "
97 << map_type;
98 VectorFst<Arc> *ofst = new VectorFst<Arc>;
99 ofst->SetProperties(kError, kError);
100 args->retval = new FstClass(ofst);
101 }
102 }
103
104
105 #ifdef SWIG
106 %newobject Map;
107 #endif
108 FstClass *Map(const FstClass& f, MapType map_type,
109 float delta = fst::kDelta,
110 const WeightClass &w = fst::script::WeightClass::Zero());
111
112 } // namespace script
113 } // namespace fst
114
115 #endif // FST_SCRIPT_MAP_H_
116