| |
| // 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_RANDGEN_H_ |
| #define FST_SCRIPT_RANDGEN_H_ |
| |
| #include <fst/script/arg-packs.h> |
| #include <fst/script/fst-class.h> |
| #include <fst/randgen.h> |
| |
| namespace fst { |
| namespace script { |
| |
| enum RandArcSelection { |
| UNIFORM_ARC_SELECTOR, |
| LOG_PROB_ARC_SELECTOR, |
| FAST_LOG_PROB_ARC_SELECTOR |
| }; |
| |
| typedef args::Package<const FstClass &, MutableFstClass*, int32, |
| const RandGenOptions<RandArcSelection> &> RandGenArgs; |
| |
| template<class Arc> |
| void RandGen(RandGenArgs *args) { |
| const Fst<Arc> &ifst = *(args->arg1.GetFst<Arc>()); |
| MutableFst<Arc> *ofst = args->arg2->GetMutableFst<Arc>(); |
| int32 seed = args->arg3; |
| const RandGenOptions<RandArcSelection> &opts = args->arg4; |
| |
| if (opts.arc_selector == UNIFORM_ARC_SELECTOR) { |
| UniformArcSelector<Arc> arc_selector(seed); |
| RandGenOptions< UniformArcSelector<Arc> > |
| ropts(arc_selector, opts.max_length, |
| opts.npath, opts.weighted); |
| RandGen(ifst, ofst, ropts); |
| } else if (opts.arc_selector == FAST_LOG_PROB_ARC_SELECTOR) { |
| FastLogProbArcSelector<Arc> arc_selector(seed); |
| RandGenOptions< FastLogProbArcSelector<Arc> > |
| ropts(arc_selector, opts.max_length, |
| opts.npath, opts.weighted); |
| RandGen(ifst, ofst, ropts); |
| } else { |
| LogProbArcSelector<Arc> arc_selector(seed); |
| RandGenOptions< LogProbArcSelector<Arc> > |
| ropts(arc_selector, opts.max_length, |
| opts.npath, opts.weighted); |
| RandGen(ifst, ofst, ropts); |
| } |
| } |
| |
| |
| // Client-facing prototype |
| void RandGen(const FstClass &ifst, MutableFstClass *ofst, int32 seed = time(0), |
| const RandGenOptions<RandArcSelection> &opts = |
| fst::RandGenOptions<fst::script::RandArcSelection>( |
| fst::script::UNIFORM_ARC_SELECTOR)); |
| |
| } // namespace script |
| } // namespace fst |
| |
| |
| |
| #endif // FST_SCRIPT_RANDGEN_H_ |