extend-transform-dim.cc
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// featbin/extend-transform-dim.cc
// Copyright 2012 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"
#include "transform/transform-common.h"
namespace kaldi {
void IncreaseTransformDimension(int32 new_dimension,
Matrix<BaseFloat> *mat) {
int32 d = mat->NumRows();
if (new_dimension < d)
KALDI_ERR << "--new-dimension argument invalid or not specified: "
<< new_dimension << " < " << d;
if (mat->NumCols() == d) { // linear transform d->d
mat->Resize(new_dimension, new_dimension, kCopyData);
for (int32 i = d; i < new_dimension; i++)
(*mat)(i, i) = 1.0; // set new dims to unit matrix.
} else if (mat->NumCols() == d+1) { // affine transform d->d.
Vector<BaseFloat> offset(mat->NumRows());
offset.CopyColFromMat(*mat, d);
mat->Resize(d, d, kCopyData); // remove offset from mat->
mat->Resize(new_dimension, new_dimension+1, kCopyData); // extend with zeros.
for (int32 i = d; i < new_dimension; i++)
(*mat)(i, i) = 1.0; // set new dims to unit matrix.
for (int32 i = 0; i < d; i++) // and set offset [last column]
(*mat)(i, new_dimension) = offset(i);
} else {
KALDI_ERR << "Input matrix has unexpected dimension " << d
<< " x " << mat->NumCols();
}
}
} // end namespace kaldi
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
const char *usage =
"Read in transform from dimension d -> d (affine or linear), and output a transform\n"
"from dimension e -> e (with e >= d, and e controlled by option --new-dimension).\n"
"This new transform will leave the extra dimension unaffected, and transform the old\n"
"dimensions in the same way.\n"
"Usage: extend-transform-dim [options] (transform-A-rspecifier|transform-A-rxfilename) (transform-out-wspecifier|transform-out-wxfilename)\n"
"E.g.: extend-transform-dim --new-dimension=117 in.mat big.mat\n";
bool binary = true;
int32 new_dimension = -1;
ParseOptions po(usage);
po.Register("binary", &binary, "Write in binary mode (only relevant if output is a wxfilename)");
po.Register("new-dimension", &new_dimension,
"Larger dimension we are changing matrix to");
po.Read(argc, argv);
if (po.NumArgs() != 2) {
po.PrintUsage();
exit(1);
}
std::string transform_in_fn = po.GetArg(1);
std::string transform_out_fn = po.GetArg(2);
// all these "fn"'s are either rspecifiers or filenames.
bool in_is_rspecifier =
(ClassifyRspecifier(transform_in_fn, NULL, NULL)
!= kNoRspecifier),
out_is_wspecifier =
(ClassifyWspecifier(transform_out_fn, NULL, NULL, NULL)
!= kNoWspecifier);
if (in_is_rspecifier != out_is_wspecifier)
KALDI_ERR << "Either none or both of the (input, output) must be a Table.";
if (in_is_rspecifier) {
SequentialBaseFloatMatrixReader reader(transform_in_fn);
BaseFloatMatrixWriter writer(transform_out_fn);
int32 num_done = 0;
for (; !reader.Done(); reader.Next()) {
std::string key = reader.Key();
Matrix<BaseFloat> mat(reader.Value());
IncreaseTransformDimension(new_dimension, &mat);
writer.Write(key, mat);
num_done++;
}
KALDI_LOG << "Increased transform dim to " << new_dimension
<< " for " << num_done << " matrices.";
return (num_done != 0 ? 0 : 1);
} else {
Matrix<BaseFloat> mat;
ReadKaldiObject(transform_in_fn, &mat);
int32 old_dim = mat.NumRows();
IncreaseTransformDimension(new_dimension, &mat);
WriteKaldiObject(mat, transform_out_fn, binary);
KALDI_LOG << "Increased transform dim from " << old_dim << " to "
<< mat.NumRows() << " and wrote to " << transform_out_fn;
return 0;
}
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}