1 // fstreweight.cc 2 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 // Copyright 2005-2010 Google, Inc. 16 // Author: allauzen (at) google.com (Cyril Allauzen) 17 // Modified: jpr (at) google.com (Jake Ratkiewicz) to use FstClass 18 // 19 // \file 20 // Reweights an FST. 21 // 22 23 #include <fst/script/reweight.h> 24 #include <fst/script/text-io.h> 25 26 DEFINE_bool(to_final, false, "Push/reweight to final (vs. to initial) states"); 27 28 int main(int argc, char **argv) { 29 namespace s = fst::script; 30 using fst::script::FstClass; 31 using fst::script::MutableFstClass; 32 33 string usage = "Reweights an FST.\n\n Usage: "; 34 usage += argv[0]; 35 usage += " in.fst potential.txt [out.fst]\n"; 36 37 std::set_new_handler(FailedNewHandler); 38 SET_FLAGS(usage.c_str(), &argc, &argv, true); 39 if (argc < 3 || argc > 4) { 40 ShowUsage(); 41 return 1; 42 } 43 44 string in_fname = argv[1]; 45 string potentials_fname = argv[2]; 46 string out_fname = argc > 3 ? argv[3] : ""; 47 48 MutableFstClass *fst = MutableFstClass::Read(in_fname, true); 49 if (!fst) return 1; 50 51 vector<s::WeightClass> potential; 52 if (!s::ReadPotentials(fst->WeightType(), potentials_fname, &potential)) 53 return 1; 54 55 fst::ReweightType reweight_type = FLAGS_to_final ? 56 fst::REWEIGHT_TO_FINAL : 57 fst::REWEIGHT_TO_INITIAL; 58 59 s::Reweight(fst, potential, reweight_type); 60 fst->Write(out_fname); 61 62 return 0; 63 } 64
