fstaddselfloops.cc
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// fstbin/fstaddselfloops.cc
// Copyright 2009-2011 Microsoft Corporation
// See ../../COPYING for clarification regarding multiple authors
//
// 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
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
// MERCHANTABLITY OR NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing permissions and
// limitations under the License.
#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "fst/fstlib.h"
#include "fstext/determinize-star.h"
#include "fstext/fstext-utils.h"
#include "fstext/kaldi-fst-io.h"
/* some test examples:
pushd ~/tmpdir
( echo 3; echo 4) > in.list
( echo 5; echo 6) > out.list
( echo "0 0 0 0"; echo "0 0" ) | fstcompile | fstaddselfloops in.list out.list | fstprint
( echo "0 1 0 1"; echo " 0 2 1 0"; echo "1 0"; echo "2 0"; ) | fstcompile | fstaddselfloops in.list out.list | fstprint
*/
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
using namespace fst;
using kaldi::int32;
const char *usage =
"Adds self-loops to states of an FST to propagate disambiguation symbols through it\n"
"They are added on each final state and each state with non-epsilon output symbols\n"
"on at least one arc out of the state. Useful in conjunction with predeterminize\n"
"\n"
"Usage: fstaddselfloops in-disambig-list out-disambig-list [in.fst [out.fst] ]\n"
"E.g: fstaddselfloops in.list out.list < in.fst > withloops.fst\n"
"in.list and out.list are lists of integers, one per line, of the\n"
"same length.\n";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() < 2 || po.NumArgs() > 4) {
po.PrintUsage();
exit(1);
}
std::string disambig_in_rxfilename = po.GetArg(1),
disambig_out_rxfilename = po.GetArg(2),
fst_in_filename = po.GetOptArg(3),
fst_out_filename = po.GetOptArg(4);
VectorFst<StdArc> *fst = ReadFstKaldi(fst_in_filename);
std::vector<int32> disambig_in;
if (!ReadIntegerVectorSimple(disambig_in_rxfilename, &disambig_in))
KALDI_ERR << "fstaddselfloops: Could not read disambiguation symbols from "
<< kaldi::PrintableRxfilename(disambig_in_rxfilename);
std::vector<int32> disambig_out;
if (!ReadIntegerVectorSimple(disambig_out_rxfilename, &disambig_out))
KALDI_ERR << "fstaddselfloops: Could not read disambiguation symbols from "
<< kaldi::PrintableRxfilename(disambig_out_rxfilename);
if (disambig_in.size() != disambig_out.size())
KALDI_ERR << "fstaddselfloops: mismatch in size of disambiguation symbols";
AddSelfLoops(fst, disambig_in, disambig_out);
WriteFstKaldi(*fst, fst_out_filename);
delete fst;
return 0;
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
return 0;
}