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// chainbin/chain-make-den-fst.cc
// Copyright 2015 Johns Hopkins University (author: 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/common-utils.h"
#include "chain/chain-den-graph.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
using namespace kaldi::chain;
typedef kaldi::int32 int32;
const char *usage =
"Created 'denominator' FST for 'chain' training
"
"Outputs in FST format. <denominator-fst-out> is an epsilon-free acceptor
"
"<normalization-fst-out> is a modified version of <denominator-fst> (w.r.t.
"
"initial and final probs) that is used in example generation.
"
"
"
"Usage: chain-make-den-fsth [options] <tree> <transition-model> <phone-lm-fst> "
"<denominator-fst-out> <normalization-fst-out>
"
"e.g.:
"
"chain-make-den-fst dir/tree dir/0.trans_mdl dir/phone_lm.fst dir/den.fst dir/normalization.fst
";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() != 5) {
po.PrintUsage();
exit(1);
}
std::string tree_rxfilename = po.GetArg(1),
transition_model_rxfilename = po.GetArg(2),
phone_lm_rxfilename = po.GetArg(3),
den_fst_wxfilename = po.GetArg(4),
normalization_fst_wxfilename = po.GetArg(5);
ContextDependency ctx_dep;
TransitionModel trans_model;
fst::StdVectorFst phone_lm;
ReadKaldiObject(tree_rxfilename, &ctx_dep);
ReadKaldiObject(transition_model_rxfilename, &trans_model);
ReadFstKaldi(phone_lm_rxfilename, &phone_lm);
fst::StdVectorFst den_fst;
chain::CreateDenominatorFst(ctx_dep, trans_model, phone_lm,
&den_fst);
fst::StdVectorFst normalization_fst;
chain::DenominatorGraph den_graph(den_fst, trans_model.NumPdfs());
den_graph.GetNormalizationFst(den_fst, &normalization_fst);
WriteFstKaldi(den_fst, den_fst_wxfilename);
WriteFstKaldi(normalization_fst, normalization_fst_wxfilename);
KALDI_LOG << "Write denominator FST to " << den_fst_wxfilename
<< " and normalization FST to " << normalization_fst_wxfilename;
return 0;
} catch(const std::exception &e) {
std::cerr << e.what() << '
';
return -1;
}
}
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