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src/bin/ali-to-post.cc
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// bin/ali-to-post.cc
// Copyright 2009-2012 Microsoft Corporation, Go-Vivace Inc.,
// 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 "gmm/am-diag-gmm.h"
#include "hmm/transition-model.h"
#include "hmm/hmm-utils.h"
#include "hmm/posterior.h"
/** @brief Convert alignments to viterbi style posteriors. The aligned
symbol gets a weight of 1.0 */
int main(int argc, char *argv[]) {
using namespace kaldi;
typedef kaldi::int32 int32;
try {
const char *usage =
"Convert alignments to posteriors. This is simply a format change
"
"from integer vectors to Posteriors, which are vectors of lists of
"
"pairs (int, float) where the float represents the posterior. The
"
"floats would all be 1.0 in this case.
"
"The posteriors will still be in terms of whatever integer index
"
"the input contained, which will be transition-ids if they came
"
"directly from decoding, or pdf-ids if they were processed by
"
"ali-to-post.
"
"Usage: ali-to-post [options] <alignments-rspecifier> <posteriors-wspecifier>
"
"e.g.:
"
" ali-to-post ark:1.ali ark:1.post
"
"See also: ali-to-pdf, ali-to-phones, show-alignments, post-to-weights
";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() != 2) {
po.PrintUsage();
exit(1);
}
std::string alignments_rspecifier = po.GetArg(1);
std::string posteriors_wspecifier = po.GetArg(2);
int32 num_done = 0;
SequentialInt32VectorReader alignment_reader(alignments_rspecifier);
PosteriorWriter posterior_writer(posteriors_wspecifier);
for (; !alignment_reader.Done(); alignment_reader.Next()) {
num_done++;
const std::vector<int32> &alignment = alignment_reader.Value();
// Posterior is vector<vector<pair<int32, BaseFloat> > >
Posterior post;
AlignmentToPosterior(alignment, &post);
posterior_writer.Write(alignment_reader.Key(), post);
}
KALDI_LOG << "Converted " << num_done << " alignments.";
return (num_done != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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