select-voiced-frames.cc
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// ivectorbin/select-voiced-frames.cc
// Copyright 2013 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 "matrix/kaldi-matrix.h"
#include "feat/feature-functions.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
using kaldi::int32;
const char *usage =
"Select a subset of frames of the input files, based on the output of\n"
"compute-vad or a similar program (a vector of length num-frames,\n"
"containing 1.0 for voiced, 0.0 for unvoiced). Caution: this is\n"
"mostly useful only in speaker identification applications.\n"
"Usage: select-voiced-frames [options] <feats-rspecifier> "
" <vad-rspecifier> <feats-wspecifier>\n"
"E.g.: select-voiced-frames [options] scp:feats.scp scp:vad.scp ark:-\n";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() != 3) {
po.PrintUsage();
exit(1);
}
std::string feat_rspecifier = po.GetArg(1),
vad_rspecifier = po.GetArg(2),
feat_wspecifier = po.GetArg(3);
SequentialBaseFloatMatrixReader feat_reader(feat_rspecifier);
RandomAccessBaseFloatVectorReader vad_reader(vad_rspecifier);
BaseFloatMatrixWriter feat_writer(feat_wspecifier);
int32 num_done = 0, num_err = 0;
for (;!feat_reader.Done(); feat_reader.Next()) {
std::string utt = feat_reader.Key();
const Matrix<BaseFloat> &feat = feat_reader.Value();
if (feat.NumRows() == 0) {
KALDI_WARN << "Empty feature matrix for utterance " << utt;
num_err++;
continue;
}
if (!vad_reader.HasKey(utt)) {
KALDI_WARN << "No VAD input found for utterance " << utt;
num_err++;
continue;
}
const Vector<BaseFloat> &voiced = vad_reader.Value(utt);
if (feat.NumRows() != voiced.Dim()) {
KALDI_WARN << "Mismatch in number for frames " << feat.NumRows()
<< " for features and VAD " << voiced.Dim()
<< ", for utterance " << utt;
num_err++;
continue;
}
if (voiced.Sum() == 0.0) {
KALDI_WARN << "No features were judged as voiced for utterance "
<< utt;
num_err++;
continue;
}
int32 dim = 0;
for (int32 i = 0; i < voiced.Dim(); i++)
if (voiced(i) != 0.0)
dim++;
Matrix<BaseFloat> voiced_feat(dim, feat.NumCols());
int32 index = 0;
for (int32 i = 0; i < feat.NumRows(); i++) {
if (voiced(i) != 0.0) {
KALDI_ASSERT(voiced(i) == 1.0); // should be zero or one.
voiced_feat.Row(index).CopyFromVec(feat.Row(i));
index++;
}
}
KALDI_ASSERT(index == dim);
feat_writer.Write(utt, voiced_feat);
num_done++;
}
KALDI_LOG << "Done selecting voiced frames; processed "
<< num_done << " utterances, "
<< num_err << " had errors.";
return (num_done != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}