1 // fstmap.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@google.com (Michael Riley)
17 // Modified: jpr@google.com (Jake Ratkiewicz) to use FstClass
18 //
19 // \file
20 // Applies an operation to each arc of an FST.
21 //
22
23 #include <string>
24
25 #include <fst/script/map.h>
26
27 DEFINE_double(delta, fst::kDelta, "Comparison/quantization delta");
28 DEFINE_string(map_type, "identity",
29 "Map operation, one of: \"arc_sum\", \"identity\", \"invert\", "
30 "\"plus (--weight)\", \"quantize (--delta)\", \"rmweight\", "
31 "\"superfinal\", \"times (--weight)\", \"to_log\", \"to_log64\", "
32 "\"to_standard\"");
33 DEFINE_string(weight, "", "Weight parameter");
34
main(int argc,char ** argv)35 int main(int argc, char **argv) {
36 namespace s = fst::script;
37 using fst::script::FstClass;
38 using fst::script::MutableFstClass;
39 using fst::script::VectorFstClass;
40
41 string usage = "Applies an operation to each arc of an FST.\n\n Usage: ";
42 usage += argv[0];
43 usage += " [in.fst [out.fst]]\n";
44
45 std::set_new_handler(FailedNewHandler);
46 SET_FLAGS(usage.c_str(), &argc, &argv, true);
47 if (argc > 3) {
48 ShowUsage();
49 return 1;
50 }
51
52 string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
53 string out_name = argc > 2 ? argv[2] : "";
54
55 FstClass *ifst = FstClass::Read(in_name);
56 if (!ifst) return 1;
57
58 s::WeightClass w = !FLAGS_weight.empty() ?
59 s::WeightClass(ifst->WeightType(), FLAGS_weight) :
60 (FLAGS_map_type == "times" ?
61 s::WeightClass::One() : s::WeightClass::Zero());
62
63 s::MapType mt;
64 if (FLAGS_map_type == "arc_sum") {
65 mt = s::ARC_SUM_MAPPER;
66 } else if (FLAGS_map_type == "identity") {
67 mt = s::IDENTITY_MAPPER;
68 } else if (FLAGS_map_type == "invert") {
69 mt = s::INVERT_MAPPER;
70 } else if (FLAGS_map_type == "plus") {
71 mt = s::PLUS_MAPPER;
72 } else if (FLAGS_map_type == "quantize") {
73 mt = s::QUANTIZE_MAPPER;
74 } else if (FLAGS_map_type == "rmweight") {
75 mt = s::RMWEIGHT_MAPPER;
76 } else if (FLAGS_map_type == "superfinal") {
77 mt = s::SUPERFINAL_MAPPER;
78 } else if (FLAGS_map_type == "times") {
79 mt = s::TIMES_MAPPER;
80 } else if (FLAGS_map_type == "to_log") {
81 mt = s::TO_LOG_MAPPER;
82 } else if (FLAGS_map_type == "to_log64") {
83 mt = s::TO_LOG64_MAPPER;
84 } else if (FLAGS_map_type == "to_standard") {
85 mt = s::TO_STD_MAPPER;
86 } else {
87 LOG(ERROR) << argv[0] << ": Unknown map type \""
88 << FLAGS_map_type << "\"\n";
89 return 1;
90 }
91
92 FstClass *ofst = s::Map(*ifst, mt, FLAGS_delta, w);
93
94 ofst->Write(out_name);
95
96 return 0;
97 }
98