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src/bin/weight-post.cc
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// bin/weight-post.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;
int32 length_tolerance = 2;
const char *usage =
"Takes archives (typically per-utterance) of posteriors and per-frame weights,
"
"and weights the posteriors by the per-frame weights
"
"
"
"Usage: weight-post <post-rspecifier> <weights-rspecifier> <post-wspecifier>
";
ParseOptions po(usage);
po.Register("length-tolerance", &length_tolerance,
"Tolerate this many frames of length mismatch between "
"posteriors and weights");
po.Read(argc, argv);
if (po.NumArgs() != 3) {
po.PrintUsage();
exit(1);
}
std::string post_rspecifier = po.GetArg(1),
weights_rspecifier = po.GetArg(2),
post_wspecifier = po.GetArg(3);
SequentialPosteriorReader posterior_reader(post_rspecifier);
RandomAccessBaseFloatVectorReader weights_reader(weights_rspecifier);
PosteriorWriter post_writer(post_wspecifier);
int32 num_done = 0, num_err = 0;
for (; !posterior_reader.Done(); posterior_reader.Next()) {
std::string key = posterior_reader.Key();
Posterior post = posterior_reader.Value();
if (!weights_reader.HasKey(key)) {
KALDI_WARN << "No weights for utterance " << key;
num_err++;
continue;
}
const Vector<BaseFloat> &weights = weights_reader.Value(key);
if (std::abs(weights.Dim() - static_cast<int32>(post.size())) >
length_tolerance) {
KALDI_WARN << "Weights for utterance " << key
<< " have wrong size, " << weights.Dim()
<< " vs. " << post.size();
num_err++;
continue;
}
for (size_t i = 0; i < post.size(); i++) {
if (weights(i) == 0.0) post[i].clear();
for (size_t j = 0; j < post[i].size(); j++)
post[i][j].second *= i < weights.Dim() ? weights(i) : 0.0;
}
post_writer.Write(key, post);
num_done++;
}
KALDI_LOG << "Scaled " << num_done << " posteriors; errors on " << num_err;
return (num_done != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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