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// 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: jpr@google.com (Jake Ratkiewicz)
#ifndef FST_SCRIPT_MAP_H_
#define FST_SCRIPT_MAP_H_
#include <fst/script/arg-packs.h>
#include <fst/script/fst-class.h>
#include <fst/script/weight-class.h>
#include <fst/arc-map.h>
#include <fst/state-map.h>
namespace fst {
namespace script {
template <class M>
Fst<typename M::ToArc> *ArcMap(const Fst<typename M::FromArc> &fst,
const M &mapper) {
typedef typename M::ToArc ToArc;
VectorFst<ToArc> *ofst = new VectorFst<ToArc>;
ArcMap(fst, ofst, mapper);
return ofst;
}
template <class M>
Fst<typename M::ToArc> *StateMap(const Fst<typename M::FromArc> &fst,
const M &mapper) {
typedef typename M::ToArc ToArc;
VectorFst<ToArc> *ofst = new VectorFst<ToArc>;
StateMap(fst, ofst, mapper);
return ofst;
}
enum MapType { ARC_SUM_MAPPER, IDENTITY_MAPPER, INVERT_MAPPER, PLUS_MAPPER,
QUANTIZE_MAPPER, RMWEIGHT_MAPPER, SUPERFINAL_MAPPER,
TIMES_MAPPER, TO_LOG_MAPPER, TO_LOG64_MAPPER, TO_STD_MAPPER };
typedef args::Package<const FstClass&, MapType, float,
const WeightClass &> MapInnerArgs;
typedef args::WithReturnValue<FstClass*, MapInnerArgs> MapArgs;
template <class Arc>
void Map(MapArgs *args) {
const Fst<Arc> &ifst = *(args->args.arg1.GetFst<Arc>());
MapType map_type = args->args.arg2;
float delta = args->args.arg3;
typename Arc::Weight w = *(args->args.arg4.GetWeight<typename Arc::Weight>());
if (map_type == ARC_SUM_MAPPER) {
args->retval = new FstClass(
script::StateMap(ifst, ArcSumMapper<Arc>(ifst)));
} else if (map_type == IDENTITY_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, IdentityArcMapper<Arc>()));
} else if (map_type == INVERT_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, InvertWeightMapper<Arc>()));
} else if (map_type == PLUS_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, PlusMapper<Arc>(w)));
} else if (map_type == QUANTIZE_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, QuantizeMapper<Arc>(delta)));
} else if (map_type == RMWEIGHT_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, RmWeightMapper<Arc>()));
} else if (map_type == SUPERFINAL_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, SuperFinalMapper<Arc>()));
} else if (map_type == TIMES_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, TimesMapper<Arc>(w)));
} else if (map_type == TO_LOG_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, WeightConvertMapper<Arc, LogArc>()));
} else if (map_type == TO_LOG64_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, WeightConvertMapper<Arc, Log64Arc>()));
} else if (map_type == TO_STD_MAPPER) {
args->retval = new FstClass(
script::ArcMap(ifst, WeightConvertMapper<Arc, StdArc>()));
} else {
FSTERROR() << "Error: unknown/unsupported mapper type: "
<< map_type;
VectorFst<Arc> *ofst = new VectorFst<Arc>;
ofst->SetProperties(kError, kError);
args->retval = new FstClass(ofst);
}
}
#ifdef SWIG
%newobject Map;
#endif
FstClass *Map(const FstClass& f, MapType map_type,
float delta = fst::kDelta,
const WeightClass &w = fst::script::WeightClass::Zero());
} // namespace script
} // namespace fst
#endif // FST_SCRIPT_MAP_H_
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