102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
|
// fstbin/fstrmepslocal.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/kaldi-io.h"
|
||
|
|
#include "util/parse-options.h"
|
||
|
|
#include "util/text-utils.h"
|
||
|
|
#include "fst/fstlib.h"
|
||
|
|
#include "fstext/determinize-star.h"
|
||
|
|
#include "fstext/fstext-utils.h"
|
||
|
|
#include "fstext/kaldi-fst-io.h"
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
A test example:
|
||
|
|
( echo "0 1 1 0"; echo "1 2 0 2"; echo "2 0"; ) | fstcompile | fstrmepslocal | fstprint
|
||
|
|
# prints:
|
||
|
|
# 0 1 1 2
|
||
|
|
# 1
|
||
|
|
( echo "0 1 0 0"; echo "0 0"; echo "1 0" ) | fstcompile | fstrmepslocal | fstprint
|
||
|
|
# 0
|
||
|
|
( echo "0 1 0 0"; echo "0 0"; echo "1 0" ) | fstcompile | fstrmepslocal | fstprint
|
||
|
|
( echo "0 1 0 0"; echo "0 0"; echo "1 0" ) | fstcompile | fstrmepslocal --use-log=true | fstprint
|
||
|
|
# 0 -0.693147182
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
int main(int argc, char *argv[]) {
|
||
|
|
try {
|
||
|
|
using namespace kaldi;
|
||
|
|
using namespace fst;
|
||
|
|
using kaldi::int32;
|
||
|
|
|
||
|
|
const char *usage =
|
||
|
|
"Removes some (but not all) epsilons in an algorithm that will always reduce the number of\n"
|
||
|
|
"arcs+states. Option to preserves equivalence in tropical or log semiring, and\n"
|
||
|
|
"if in tropical, stochasticit in either log or tropical.\n"
|
||
|
|
"\n"
|
||
|
|
"Usage: fstrmepslocal [in.fst [out.fst] ]\n";
|
||
|
|
|
||
|
|
ParseOptions po(usage);
|
||
|
|
bool use_log = false;
|
||
|
|
bool stochastic_in_log = true;
|
||
|
|
po.Register("use-log", &use_log,
|
||
|
|
"Preserve equivalence in log semiring [false->tropical]\n");
|
||
|
|
po.Register("stochastic-in-log", &stochastic_in_log,
|
||
|
|
"Preserve stochasticity in log semiring [false->tropical]\n");
|
||
|
|
po.Read(argc, argv);
|
||
|
|
|
||
|
|
if (po.NumArgs() > 2) {
|
||
|
|
po.PrintUsage();
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string fst_in_filename = po.GetOptArg(1),
|
||
|
|
fst_out_filename = po.GetOptArg(2);
|
||
|
|
|
||
|
|
VectorFst<StdArc> *fst = ReadFstKaldi(fst_in_filename);
|
||
|
|
|
||
|
|
if (!use_log && stochastic_in_log) {
|
||
|
|
RemoveEpsLocalSpecial(fst);
|
||
|
|
} else if (use_log && !stochastic_in_log) {
|
||
|
|
std::cerr << "fstrmsymbols: invalid combination of flags\n";
|
||
|
|
return 1;
|
||
|
|
} else if (use_log) {
|
||
|
|
VectorFst<LogArc> log_fst;
|
||
|
|
Cast(*fst, &log_fst);
|
||
|
|
delete fst;
|
||
|
|
RemoveEpsLocal(&log_fst);
|
||
|
|
fst = new VectorFst<StdArc>;
|
||
|
|
Cast(log_fst, fst);
|
||
|
|
} else {
|
||
|
|
RemoveEpsLocal(fst);
|
||
|
|
}
|
||
|
|
|
||
|
|
WriteFstKaldi(*fst, fst_out_filename);
|
||
|
|
delete fst;
|
||
|
|
return 0;
|
||
|
|
} catch(const std::exception &e) {
|
||
|
|
std::cerr << e.what();
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|