lattice-depth.cc
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// latbin/lattice-depth.cc
// Copyright 2013 Ehsan Variani
// 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 "base/kaldi-common.h"
#include "util/common-utils.h"
#include "fstext/fstext-lib.h"
#include "lat/kaldi-lattice.h"
#include "lat/lattice-functions.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
typedef kaldi::int32 int32;
typedef kaldi::int64 int64;
using fst::VectorFst;
using fst::StdArc;
typedef StdArc::StateId StateId;
const char *usage =
"Compute the lattice depths in terms of the average number of arcs that\n"
"cross a frame. See also lattice-depth-per-frame\n"
"Usage: lattice-depth <lattice-rspecifier> [<depth-wspecifier>]\n"
"E.g.: lattice-depth ark:- ark,t:-\n";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() < 1 || po.NumArgs() > 2) {
po.PrintUsage();
exit(1);
}
std::string lats_rspecifier = po.GetArg(1);
SequentialCompactLatticeReader clat_reader(lats_rspecifier);
std::string depth_wspecifier = po.GetOptArg(2);
BaseFloatWriter lats_depth_writer(depth_wspecifier);
int64 num_done = 0;
double sum_depth = 0.0, total_t = 0.0;
for (; !clat_reader.Done(); clat_reader.Next()) {
CompactLattice clat = clat_reader.Value();
std::string key = clat_reader.Key();
TopSortCompactLatticeIfNeeded(&clat);
int32 t;
BaseFloat depth = CompactLatticeDepth(clat, &t);
if (depth_wspecifier != "")
lats_depth_writer.Write(key, depth);
sum_depth += depth * t;
total_t += t;
num_done++;
}
KALDI_LOG << "Done " << num_done << " lattices.";
// Warning: the script egs/s5/*/steps/oracle_wer.sh parses the next line.
KALDI_LOG << "Overall density is " << (sum_depth / total_t) << " over "
<< total_t << " frames.";
if (num_done != 0) return 0;
else return 1;
} catch (const std::exception &e) {
std::cerr << e.what();
return -1;
}
}