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src/bin/transform-vec.cc
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// bin/transform-vec.cc
// Copyright 2009-2012 Microsoft Corporation
// 2012-2014 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 "matrix/kaldi-matrix.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
const char *usage =
"This program applies a linear or affine transform to individual vectors, e.g.
"
"iVectors. It is transform-feats, except it works on vectors rather than matrices,
"
"and expects a single transform matrix rather than possibly a table of matrices
"
"
"
"Usage: transform-vec [options] <transform-rxfilename> <feats-rspecifier> <feats-wspecifier>
"
"See also: transform-feats, est-pca
";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() != 3) {
po.PrintUsage();
exit(1);
}
std::string transform_rxfilename = po.GetArg(1);
std::string vec_rspecifier = po.GetArg(2);
std::string vec_wspecifier = po.GetArg(3);
SequentialBaseFloatVectorReader vec_reader(vec_rspecifier);
BaseFloatVectorWriter vec_writer(vec_wspecifier);
Matrix<BaseFloat> transform;
ReadKaldiObject(transform_rxfilename, &transform);
int32 num_done = 0;
for (; !vec_reader.Done(); vec_reader.Next()) {
std::string key = vec_reader.Key();
const Vector<BaseFloat> &vec(vec_reader.Value());
int32 transform_rows = transform.NumRows(),
transform_cols = transform.NumCols(),
vec_dim = vec.Dim();
Vector<BaseFloat> vec_out(transform_rows);
if (transform_cols == vec_dim) {
vec_out.AddMatVec(1.0, transform, kNoTrans, vec, 0.0);
} else {
if (transform_cols != vec_dim + 1) {
KALDI_ERR << "Dimension mismatch: input vector has dimension "
<< vec.Dim() << " and transform has " << transform_cols
<< " columns.";
}
vec_out.CopyColFromMat(transform, vec_dim);
vec_out.AddMatVec(1.0, transform.Range(0, transform.NumRows(),
0, vec_dim), kNoTrans, vec, 1.0);
}
vec_writer.Write(key, vec_out);
num_done++;
}
KALDI_LOG << "Applied transform to " << num_done << " vectors.";
return (num_done != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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