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src/fstbin/fstmakecontextsyms.cc
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// fstbin/fstmakecontextsyms.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 "tree/context-dep.h"
#include "util/common-utils.h"
#include "fst/fstlib.h"
#include "fstext/fstext-utils.h"
#include "fstext/context-fst.h"
/*
Test for this and makecontextfst:
mkdir -p ~/tmpdir
pushd ~/tmpdir
(echo "<eps> 0"; echo "a 1"; echo "b 2"; echo "#0 3"; echo "#1 4"; echo "#$ 5" ) > phones.txt
( echo 3; echo 4 ) > disambig.list
fstmakecontextfst --read-disambig-syms=disambig.list <(grep -v '#' phones.txt) 5 ilabels.int > C.fst
fstmakecontextsyms phones.txt ilabels.int > context_syms.txt
fstprint --isymbols=context_syms.txt --osymbols=phones.txt C.fst > C.txt
fstrandgen C.fst | fstprint --isymbols=context_syms.txt --osymbols=phones.txt
Example output:
fstrandgen C.fst | fstprint --isymbols=context_syms.txt --osymbols=phones.txt
0 1 #-1 b
1 2 <eps>/b/<eps> #$
2 3 #1 #1
3 4 #0 #0
4 5 #0 #0
5 6 #0 #0
6 7 #0 #0
7 8 #0 #0
8 9 #1 #1
9
*/
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
using namespace fst;
typedef fst::StdArc::Label Label;
const char *usage = "Create input symbols for CLG
"
"Usage: fstmakecontextsyms phones-symtab ilabels_input_file [output-symtab.txt]
"
"E.g.: fstmakecontextsyms phones.txt ilabels.sym > context_symbols.txt
";
ParseOptions po(usage);
std::string disambig_list_file = "",
phone_separator = "/",
initial_disambig = "#-1";
po.Register("phone-separator", &phone_separator,
"Separator for phones in phone-in-context symbols.");
po.Register("initial-disambig", &initial_disambig,
"Name for special disambiguation symbol that occurs at start "
"of context-dependent phone sequences");
po.Read(argc, argv);
if (po.NumArgs() < 2 || po.NumArgs() > 3) {
po.PrintUsage();
exit(1);
}
std::string phones_symtab_filename = po.GetArg(1),
ilabel_info_filename = po.GetArg(2),
clg_symtab_filename = po.GetOptArg(3);
std::vector<std::vector<kaldi::int32> > ilabel_info;
{
bool binary;
Input ki(ilabel_info_filename, &binary);
ReadILabelInfo(ki.Stream(),
binary, &ilabel_info);
}
fst::SymbolTable *phones_symtab = NULL;
{ // read phone symbol table.
std::ifstream is(phones_symtab_filename.c_str());
phones_symtab = fst::SymbolTable::ReadText(is, phones_symtab_filename);
if (!phones_symtab) KALDI_ERR << "Could not read phones symbol-table file "<<phones_symtab_filename;
}
fst::SymbolTable *clg_symtab =
CreateILabelInfoSymbolTable(ilabel_info,
*phones_symtab,
phone_separator,
initial_disambig);
if (clg_symtab_filename == "") {
if (!clg_symtab->WriteText(std::cout))
KALDI_ERR << "Cannot write symbol table to standard output.";
} else {
if (!clg_symtab->WriteText(clg_symtab_filename))
KALDI_ERR << "Cannot open symbol table file "<<clg_symtab_filename<<" for writing.";
}
delete clg_symtab;
delete phones_symtab;
return 0;
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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