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src/lat/minimize-lattice-test.cc
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// lat/minimize-lattice-test.cc
// Copyright 2013 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 "lat/kaldi-lattice.h"
#include "lat/minimize-lattice.h"
#include "lat/push-lattice.h"
#include "fstext/rand-fst.h"
namespace kaldi {
using namespace fst;
CompactLattice *RandDeterministicCompactLattice() {
RandFstOptions opts;
opts.acyclic = true;
while (1) {
Lattice *fst = fst::RandPairFst<LatticeArc>(opts);
CompactLattice *cfst = new CompactLattice;
if (!DeterminizeLattice(*fst, cfst)) {
delete fst;
delete cfst;
KALDI_WARN << "Determinization failed, trying again.";
} else {
delete fst;
return cfst;
}
}
}
void TestMinimizeCompactLattice() {
CompactLattice *clat = RandDeterministicCompactLattice();
CompactLattice clat2(*clat);
BaseFloat delta = (Rand() % 2 == 0 ? 1.0 : 1.0e-05);
// Minimization will only work well on determinized and pushed lattices.
PushCompactLatticeStrings(&clat2);
PushCompactLatticeWeights(&clat2);
MinimizeCompactLattice(&clat2, delta);
KALDI_ASSERT(fst::RandEquivalent(*clat, clat2, 5, delta, Rand(), 10));
delete clat;
}
} // end namespace kaldi
int main() {
using namespace kaldi;
using kaldi::int32;
SetVerboseLevel(4);
for (int32 i = 0; i < 1000; i++) {
TestMinimizeCompactLattice();
}
KALDI_LOG << "Success.";
}
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