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src/bin/vector-scale.cc
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// bin/vector-scale.cc
// Copyright 2009-2011 Microsoft Corporation
// 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 =
"Scale vectors, or archives of vectors (useful for speaker vectors and "
"per-frame weights)
"
"Usage: vector-scale [options] <vector-in-rspecifier> <vector-out-wspecifier>
"
" or: vector-scale [options] <vector-in-rxfilename> <vector-out-wxfilename>
"
" e.g.: vector-scale --scale=-1.0 1.vec -
"
" vector-scale --scale=-2.0 ark:vec.ark ark,t:-
"
"See also: copy-vector, vector-sum
";
ParseOptions po(usage);
BaseFloat scale = 1.0;
bool binary = false;
po.Register("binary", &binary, "If true, write output as binary "
"not relevant for archives");
po.Register("scale", &scale, "Scaling factor for vectors");
po.Read(argc, argv);
if (po.NumArgs() != 2) {
po.PrintUsage();
exit(1);
}
std::string vector_in_fn = po.GetArg(1);
std::string vector_out_fn = po.GetArg(2);
if (ClassifyWspecifier(vector_in_fn, NULL, NULL, NULL) != kNoWspecifier) {
if (ClassifyRspecifier(vector_in_fn, NULL, NULL) == kNoRspecifier) {
KALDI_ERR << "Cannot mix archives and regular files";
}
BaseFloatVectorWriter vec_writer(vector_out_fn);
SequentialBaseFloatVectorReader vec_reader(vector_in_fn);
for (; !vec_reader.Done(); vec_reader.Next()) {
Vector<BaseFloat> vec(vec_reader.Value());
vec.Scale(scale);
vec_writer.Write(vec_reader.Key(), vec);
}
} else {
if (ClassifyRspecifier(vector_in_fn, NULL, NULL) != kNoRspecifier) {
KALDI_ERR << "Cannot mix archives and regular files";
}
bool binary_in;
Input ki(vector_in_fn, &binary_in);
Vector<BaseFloat> vec;
vec.Read(ki.Stream(), binary_in);
vec.Scale(scale);
Output ko(vector_out_fn, binary);
vec.Write(ko.Stream(), binary);
}
return 0;
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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