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src/fstbin/fstpushspecial.cc
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// fstbin/fstpushspecial.cc
// Copyright 2012 Daniel Povey
// 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/fstext-utils.h"
#include "fstext/push-special.h"
#include "fstext/kaldi-fst-io.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
using namespace fst;
using kaldi::int32;
const char *usage =
"Pushes weights in an FST such that all the states
"
"in the FST have arcs and final-probs with weights that
"
"sum to the same amount (viewed as being in the log semiring).
"
"Thus, the \"extra weight\" is distributed throughout the FST.
"
"Tolerance parameter --delta controls how exact this is, and the
"
"speed.
"
"
"
"Usage: fstpushspecial [options] [in.fst [out.fst] ]
";
BaseFloat delta = kDelta;
ParseOptions po(usage);
po.Register("delta", &delta, "Delta cost: after pushing, all states will "
"have a total weight that differs from the average by no more "
"than this.");
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);
PushSpecial(fst, delta);
WriteFstKaldi(*fst, fst_out_filename);
delete fst;
return 0;
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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