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src/bin/post-to-weights.cc
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// bin/post-to-weights.cc
// Copyright 2009-2011 Chao Weng 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 "util/common-utils.h"
#include "hmm/posterior.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
typedef kaldi::int32 int32;
const char *usage =
"Turn posteriors into per-frame weights (typically most useful after
"
"weight-silence-post, to get silence weights)
"
"See also: weight-silence-post, post-to-pdf-post, post-to-phone-post
"
"post-to-feats, get-post-on-ali
"
"Usage: post-to-weights <post-rspecifier> <weights-wspecifier>
";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() != 2) {
po.PrintUsage();
exit(1);
}
std::string post_rspecifier = po.GetArg(1),
weights_wspecifier = po.GetArg(2);
SequentialPosteriorReader posterior_reader(post_rspecifier);
BaseFloatVectorWriter weights_writer(weights_wspecifier);
int32 num_done = 0;
for (; !posterior_reader.Done(); posterior_reader.Next()) {
std::string key = posterior_reader.Key();
const Posterior &posterior = posterior_reader.Value();
int32 num_frames = static_cast<int32>(posterior.size());
Vector<BaseFloat> weights(num_frames);
for (int32 i = 0; i < num_frames; i++) {
BaseFloat sum = 0.0;
for (size_t j = 0; j < posterior[i].size(); j++)
sum += posterior[i][j].second;
weights(i) = sum;
}
weights_writer.Write(key, weights);
num_done++;
}
KALDI_LOG << "Done converting " << num_done << " posteriors to weights.";
return (num_done != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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