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PaddleSpeech/speechx/tools/fstbin/fstdeterminizestar.cc

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4.3 KiB

// fstbin/fstdeterminizestar.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 "fst/fstlib.h"
#include "fstext/determinize-star.h"
#include "fstext/fstext-utils.h"
#include "fstext/kaldi-fst-io.h"
#include "util/parse-options.h"
#if !defined(_MSC_VER) && !defined(__APPLE__)
#include <signal.h> // Comment this line and the call to signal below if
// it causes compilation problems. It is only to enable a debugging procedure
// when determinization does not terminate. We are disabling this code if
// compiling on Windows because signal.h is not available there, and on
// MacOS due to a problem with <signal.h> in the initial release of Sierra.
#endif
/* some test examples:
( echo "0 0 0 0"; echo "0 0" ) | fstcompile | fstdeterminizestar | fstprint
( echo "0 0 1 0"; echo "0 0" ) | fstcompile | fstdeterminizestar | fstprint
( echo "0 0 1 0"; echo "0 1 1 0"; echo "0 0" ) | fstcompile |
fstdeterminizestar | fstprint # this last one fails [correctly]: ( echo "0 0 0
1"; echo "0 0" ) | fstcompile | fstdeterminizestar | fstprint
cd ~/tmpdir
while true; do
fstrand > 1.fst
fstpredeterminize out.lst 1.fst | fstdeterminizestar | fstrmsymbols out.lst
> 2.fst fstequivalent --random=true 1.fst 2.fst || echo "Test failed" echo -n
"." done
Test of debugging [with non-determinizable input]:
( echo " 0 0 1 0 1.0"; echo "0 1 1 0"; echo "1 1 1 0 0"; echo "0 2 2 0"; echo
"2"; echo "1" ) | fstcompile | fstdeterminizestar kill -SIGUSR1 [the process-id
of fstdeterminizestar] # prints out a bunch of debugging output showing the
mess it got itself into.
*/
bool debug_location = false;
void signal_handler(int) { debug_location = true; }
int main(int argc, char *argv[]) {
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try {
using namespace kaldi; // NOLINT
using namespace fst; // NOLINT
using kaldi::int32;
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const char *usage =
"Removes epsilons and determinizes in one step\n"
"\n"
"Usage: fstdeterminizestar [in.fst [out.fst] ]\n"
"\n"
"See also: fstdeterminizelog, lattice-determinize\n";
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float delta = kDelta;
int max_states = -1;
bool use_log = false;
ParseOptions po(usage);
po.Register("use-log", &use_log, "Determinize in log semiring.");
po.Register("delta",
&delta,
"Delta value used to determine equivalence of weights.");
po.Register("max-states",
&max_states,
"Maximum number of states in determinized FST before it "
"will abort.");
po.Read(argc, argv);
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if (po.NumArgs() > 2) {
po.PrintUsage();
exit(1);
}
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std::string fst_in_str = po.GetOptArg(1), fst_out_str = po.GetOptArg(2);
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// This enables us to get traceback info from determinization that is
// not seeming to terminate.
#if !defined(_MSC_VER) && !defined(__APPLE__)
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signal(SIGUSR1, signal_handler);
#endif
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// Normal case: just files.
VectorFst<StdArc> *fst = ReadFstKaldi(fst_in_str);
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ArcSort(fst, ILabelCompare<StdArc>()); // improves speed.
if (use_log) {
DeterminizeStarInLog(fst, delta, &debug_location, max_states);
} else {
VectorFst<StdArc> det_fst;
DeterminizeStar(*fst, &det_fst, delta, &debug_location, max_states);
*fst = det_fst; // will do shallow copy and then det_fst goes
// out of scope anyway.
}
WriteFstKaldi(*fst, fst_out_str);
delete fst;
return 0;
} catch (const std::exception &e) {
std::cerr << e.what();
return -1;
}
}