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src/matrix/tp-matrix.h
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// matrix/tp-matrix.h
// Copyright 2009-2011 Ondrej Glembek; Lukas Burget; Microsoft Corporation;
// Saarland University; Yanmin Qian; Haihua Xu
// 2013 Johns Hopkins Universith (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.
#ifndef KALDI_MATRIX_TP_MATRIX_H_
#define KALDI_MATRIX_TP_MATRIX_H_
#include "matrix/packed-matrix.h"
namespace kaldi {
/// \addtogroup matrix_group
/// @{
template<typename Real> class TpMatrix;
/// @brief Packed symetric matrix class
template<typename Real>
class TpMatrix : public PackedMatrix<Real> {
friend class CuTpMatrix<float>;
friend class CuTpMatrix<double>;
public:
TpMatrix() : PackedMatrix<Real>() {}
explicit TpMatrix(MatrixIndexT r, MatrixResizeType resize_type = kSetZero)
: PackedMatrix<Real>(r, resize_type) {}
TpMatrix(const TpMatrix<Real>& orig) : PackedMatrix<Real>(orig) {}
/// Copy constructor from CUDA TpMatrix
/// This is defined in ../cudamatrix/cu-tp-matrix.cc
explicit TpMatrix(const CuTpMatrix<Real> &cu);
template<typename OtherReal> explicit TpMatrix(const TpMatrix<OtherReal>& orig)
: PackedMatrix<Real>(orig) {}
Real operator() (MatrixIndexT r, MatrixIndexT c) const {
if (static_cast<UnsignedMatrixIndexT>(c) >
static_cast<UnsignedMatrixIndexT>(r)) {
KALDI_ASSERT(static_cast<UnsignedMatrixIndexT>(c) <
static_cast<UnsignedMatrixIndexT>(this->num_rows_));
return 0;
}
KALDI_ASSERT(static_cast<UnsignedMatrixIndexT>(r) <
static_cast<UnsignedMatrixIndexT>(this->num_rows_));
// c<=r now so don't have to check c.
return *(this->data_ + (r*(r+1)) / 2 + c);
// Duplicating code from PackedMatrix.h
}
Real &operator() (MatrixIndexT r, MatrixIndexT c) {
KALDI_ASSERT(static_cast<UnsignedMatrixIndexT>(r) <
static_cast<UnsignedMatrixIndexT>(this->num_rows_));
KALDI_ASSERT(static_cast<UnsignedMatrixIndexT>(c) <=
static_cast<UnsignedMatrixIndexT>(r) &&
"you cannot access the upper triangle of TpMatrix using "
"a non-const matrix object.");
return *(this->data_ + (r*(r+1)) / 2 + c);
// Duplicating code from PackedMatrix.h
}
// Note: Cholesky may throw KaldiFatalError.
void Cholesky(const SpMatrix<Real>& orig);
void Invert();
// Inverts in double precision.
void InvertDouble() {
TpMatrix<double> dmat(*this);
dmat.Invert();
(*this).CopyFromTp(dmat);
}
/// Shallow swap
void Swap(TpMatrix<Real> *other);
/// Returns the determinant of the matrix (product of diagonals)
Real Determinant();
/// CopyFromMat copies the lower triangle of M into *this
/// (or the upper triangle, if Trans == kTrans).
void CopyFromMat(const MatrixBase<Real> &M,
MatrixTransposeType Trans = kNoTrans);
/// This is implemented in ../cudamatrix/cu-tp-matrix.cc
void CopyFromMat(const CuTpMatrix<Real> &other);
/// CopyFromTp copies another triangular matrix into this one.
void CopyFromTp(const TpMatrix<Real> &other) {
PackedMatrix<Real>::CopyFromPacked(other);
}
template<typename OtherReal> void CopyFromTp(const TpMatrix<OtherReal> &other) {
PackedMatrix<Real>::CopyFromPacked(other);
}
/// AddTp does *this += alpha * M.
void AddTp(const Real alpha, const TpMatrix<Real> &M) {
this->AddPacked(alpha, M);
}
TpMatrix<Real>& operator=(const TpMatrix<Real> &other) {
PackedMatrix<Real>::operator=(other);
return *this;
}
using PackedMatrix<Real>::Scale;
void Resize(MatrixIndexT nRows, MatrixResizeType resize_type = kSetZero) {
PackedMatrix<Real>::Resize(nRows, resize_type);
}
};
/// @} end of "addtogroup matrix_group".
} // namespace kaldi
#endif
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