1 // fstpush.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: riley (at) google.com (Michael Riley) 17 // Modified: jpr (at) google.com (Jake Ratkiewicz) to use FstClass 18 // \file 19 // Pushes weights and/or output labels in an FST toward the initial or 20 // final states. 21 22 #include <fst/script/push.h> 23 24 DEFINE_double(delta, fst::kDelta, "Comparison/quantization delta"); 25 DEFINE_bool(push_weights, false, "Push weights"); 26 DEFINE_bool(push_labels, false, "Push output labels"); 27 DEFINE_bool(remove_total_weight, false, 28 "Remove total weight when pushing weights"); 29 DEFINE_bool(remove_common_affix, false, 30 "Remove common prefix/suffix when pushing labels"); 31 DEFINE_bool(to_final, false, "Push/reweight to final (vs. to initial) states"); 32 33 34 int main(int argc, char **argv) { 35 namespace s = fst::script; 36 using fst::script::FstClass; 37 using fst::script::VectorFstClass; 38 39 string usage = "Pushes weights and/or olabels in an FST.\n\n Usage: "; 40 usage += argv[0]; 41 usage += " [in.fst [out.fst]]\n"; 42 43 std::set_new_handler(FailedNewHandler); 44 SetFlags(usage.c_str(), &argc, &argv, true); 45 if (argc > 3) { 46 ShowUsage(); 47 return 1; 48 } 49 50 string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : ""; 51 string out_name = argc > 2 ? argv[2] : ""; 52 53 FstClass *ifst = FstClass::Read(in_name); 54 if (!ifst) return 1; 55 56 uint32 flags = 0; 57 if (FLAGS_push_weights) 58 flags |= fst::kPushWeights; 59 if (FLAGS_push_labels) 60 flags |= fst::kPushLabels; 61 if (FLAGS_remove_total_weight) 62 flags |= fst::kPushRemoveTotalWeight; 63 if (FLAGS_remove_common_affix) 64 flags |= fst::kPushRemoveCommonAffix; 65 66 VectorFstClass ofst(ifst->ArcType()); 67 68 if (FLAGS_to_final) { 69 s::Push(*ifst, &ofst, flags, fst::REWEIGHT_TO_FINAL, FLAGS_delta); 70 } else { 71 s::Push(*ifst, &ofst, flags, fst::REWEIGHT_TO_INITIAL, FLAGS_delta); 72 } 73 74 ofst.Write(out_name); 75 76 return 0; 77 } 78
