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src/bin/scale-post.cc
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// bin/scale-post.cc
// Copyright 2011 Chao Weng
// 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 "hmm/posterior.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
typedef kaldi::int32 int32;
const char *usage =
"Scale posteriors with either a global scale, or a different scale for "
" each utterance.
"
"Usage: scale-post <post-rspecifier> (<scale-rspecifier>|<scale>) <post-wspecifier>
";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() != 3) {
po.PrintUsage();
exit(1);
}
std::string post_rspecifier = po.GetArg(1),
scale_or_scale_rspecifier = po.GetArg(2),
post_wspecifier = po.GetArg(3);
double global_scale = 0.0;
if (ClassifyRspecifier(scale_or_scale_rspecifier, NULL, NULL) == kNoRspecifier) {
// treat second arg as a floating-point scale.
if (!ConvertStringToReal(scale_or_scale_rspecifier, &global_scale))
KALDI_ERR << "Bad second argument " << scale_or_scale_rspecifier
<< " (expected scale or scale rspecifier)";
scale_or_scale_rspecifier = ""; // So the archive won't be opened.
}
SequentialPosteriorReader posterior_reader(post_rspecifier);
RandomAccessBaseFloatReader scale_reader(scale_or_scale_rspecifier);
PosteriorWriter posterior_writer(post_wspecifier);
int32 num_scaled = 0, num_no_scale = 0;
for (; !posterior_reader.Done(); posterior_reader.Next()) {
std::string key = posterior_reader.Key();
Posterior posterior = posterior_reader.Value();
posterior_reader.FreeCurrent();
if (scale_or_scale_rspecifier != "" && !scale_reader.HasKey(key)) {
num_no_scale++;
} else {
BaseFloat post_scale = (scale_or_scale_rspecifier == "" ? global_scale
: scale_reader.Value(key));
ScalePosterior(post_scale, &posterior);
num_scaled++;
posterior_writer.Write(key, posterior);
}
}
KALDI_LOG << "Done " << num_scaled << " posteriors; " << num_no_scale
<< " had no scales.";
return (num_scaled != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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