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// bin/sum-post.cc
// Copyright 2011-2013 Johns Hopkins University (Author: Daniel Povey) Chao Weng
// 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 "util/stl-utils.h"
#include "hmm/posterior.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
typedef kaldi::int32 int32;
typedef kaldi::int64 int64;
const char *usage =
"Sum two sets of posteriors for each utterance, e.g. useful in fMMI.
"
"To take the difference of posteriors, use e.g. --scale2=-1.0
"
"
"
"Usage: sum-post <post-rspecifier1> <post-rspecifier2> <post-wspecifier>
";
BaseFloat scale1 = 1.0, scale2 = 1.0;
bool merge = true;
bool drop_frames = false;
ParseOptions po(usage);
po.Register("scale1", &scale1, "Scale for first set of posteriors");
po.Register("scale2", &scale2, "Scale for second set of posteriors");
po.Register("merge", &merge, "If true, merge posterior entries for "
"same transition-id (canceling positive and negative parts)");
po.Register("zero-if-disjoint", &drop_frames, "If true, zero "
"posteriors on all frames when the two sets of posteriors are "
"disjoint (this option for back-compatibility only; use "
"'--drop-frames'");
po.Register("drop-frames", &drop_frames, "If true, zero "
"posteriors on all frames when the two sets of posteriors are "
"disjoint");
po.Read(argc, argv);
if (po.NumArgs() != 3) {
po.PrintUsage();
exit(1);
}
std::string post_rspecifier1 = po.GetArg(1),
post_rspecifier2 = po.GetArg(2),
post_wspecifier = po.GetArg(3);
kaldi::SequentialPosteriorReader posterior_reader1(post_rspecifier1);
kaldi::RandomAccessPosteriorReader posterior_reader2(post_rspecifier2);
kaldi::PosteriorWriter posterior_writer(post_wspecifier);
int32 num_done = 0, num_err = 0;
int64 num_frames_tot = 0, num_frames_disjoint = 0;
for (; !posterior_reader1.Done(); posterior_reader1.Next()) {
std::string key = posterior_reader1.Key();
kaldi::Posterior posterior1 = posterior_reader1.Value();
if (!posterior_reader2.HasKey(key)) {
KALDI_WARN << "Second set of posteriors has nothing for key "
<< key << ", producing no output.";
num_err++;
continue;
}
kaldi::Posterior posterior2 = posterior_reader2.Value(key);
if (posterior2.size() != posterior1.size()) {
KALDI_WARN << "Posteriors have mismatched sizes " << posterior1.size()
<< " vs. " << posterior2.size() << " for key " << key;
num_err++;
continue;
}
ScalePosterior(scale1, &posterior1);
ScalePosterior(scale2, &posterior2);
kaldi::Posterior posterior_out;
num_frames_disjoint += MergePosteriors(posterior1, posterior2, merge,
drop_frames, &posterior_out);
num_frames_tot += static_cast<int64>(posterior1.size());
posterior_writer.Write(key, posterior_out);
num_done++;
}
KALDI_LOG << "Processed " << num_frames_tot << " frames; for "
<< num_frames_disjoint << " frames there was no overlap, i.e. "
<< (num_frames_disjoint * 100.0 / num_frames_tot)
<< "% (e.g. numerator path not in denominator lattice)";
KALDI_LOG << "Done adding " << num_done << " posteriors; " << num_err
<< " with errors.";
return (num_done != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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