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// gmm/diag-gmm-inl.h
// Copyright 2009-2011 Jan Silovsky
// 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_GMM_DIAG_GMM_INL_H_
#define KALDI_GMM_DIAG_GMM_INL_H_
#include "util/stl-utils.h"
namespace kaldi {
template<class Real>
void DiagGmm::SetWeights(const VectorBase<Real> &w) {
KALDI_ASSERT(weights_.Dim() == w.Dim());
weights_.CopyFromVec(w);
valid_gconsts_ = false;
}
inline void DiagGmm::SetComponentWeight(int32 g, BaseFloat w) {
KALDI_ASSERT(w > 0.0);
KALDI_ASSERT(g < NumGauss());
weights_(g) = w;
valid_gconsts_ = false;
}
template<class Real>
void DiagGmm::SetMeans(const MatrixBase<Real> &m) {
KALDI_ASSERT(means_invvars_.NumRows() == m.NumRows()
&& means_invvars_.NumCols() == m.NumCols());
means_invvars_.CopyFromMat(m);
means_invvars_.MulElements(inv_vars_);
valid_gconsts_ = false;
}
template<class Real>
void DiagGmm::SetComponentMean(int32 g, const VectorBase<Real> &in) {
KALDI_ASSERT(g < NumGauss() && Dim() == in.Dim());
Vector<Real> tmp(Dim());
tmp.CopyRowFromMat(inv_vars_, g);
tmp.MulElements(in);
means_invvars_.CopyRowFromVec(tmp, g);
valid_gconsts_ = false;
}
template<class Real>
void DiagGmm::SetInvVarsAndMeans(const MatrixBase<Real> &invvars,
const MatrixBase<Real> &means) {
KALDI_ASSERT(means_invvars_.NumRows() == means.NumRows()
&& means_invvars_.NumCols() == means.NumCols()
&& inv_vars_.NumRows() == invvars.NumRows()
&& inv_vars_.NumCols() == invvars.NumCols());
inv_vars_.CopyFromMat(invvars);
Matrix<Real> new_means_invvars(means);
new_means_invvars.MulElements(invvars);
means_invvars_.CopyFromMat(new_means_invvars);
valid_gconsts_ = false;
}
template<class Real>
void DiagGmm::SetInvVars(const MatrixBase<Real> &v) {
KALDI_ASSERT(inv_vars_.NumRows() == v.NumRows()
&& inv_vars_.NumCols() == v.NumCols());
int32 num_comp = NumGauss(), dim = Dim();
Matrix<Real> means(num_comp, dim);
Matrix<Real> vars(num_comp, dim);
vars.CopyFromMat(inv_vars_);
vars.InvertElements(); // This inversion happens in double if Real == double
means.CopyFromMat(means_invvars_);
means.MulElements(vars); // These are real means now
means.MulElements(v); // v is inverted (in double if Real == double)
means_invvars_.CopyFromMat(means); // Means times new inverse variance
inv_vars_.CopyFromMat(v);
valid_gconsts_ = false;
}
template<class Real>
void DiagGmm::SetComponentInvVar(int32 g, const VectorBase<Real> &v) {
KALDI_ASSERT(g < NumGauss() && v.Dim() == Dim());
int32 dim = Dim();
Vector<Real> mean(dim), var(dim);
var.CopyFromVec(inv_vars_.Row(g));
var.InvertElements(); // This inversion happens in double if Real == double
mean.CopyFromVec(means_invvars_.Row(g));
mean.MulElements(var); // This is a real mean now.
mean.MulElements(v); // currently, v is inverted (in double if Real == double)
means_invvars_.Row(g).CopyFromVec(mean); // Mean times new inverse variance
inv_vars_.Row(g).CopyFromVec(v);
valid_gconsts_ = false;
}
template<class Real>
void DiagGmm::GetVars(Matrix<Real> *v) const {
KALDI_ASSERT(v != NULL);
v->Resize(NumGauss(), Dim());
v->CopyFromMat(inv_vars_);
v->InvertElements();
}
template<class Real>
void DiagGmm::GetMeans(Matrix<Real> *m) const {
KALDI_ASSERT(m != NULL);
m->Resize(NumGauss(), Dim());
Matrix<Real> vars(NumGauss(), Dim());
vars.CopyFromMat(inv_vars_);
vars.InvertElements();
m->CopyFromMat(means_invvars_);
m->MulElements(vars);
}
template<class Real>
void DiagGmm::GetComponentMean(int32 gauss, VectorBase<Real> *out) const {
KALDI_ASSERT(gauss < NumGauss());
KALDI_ASSERT(static_cast<int32>(out->Dim()) == Dim());
Vector<Real> tmp(Dim());
tmp.CopyRowFromMat(inv_vars_, gauss);
out->CopyRowFromMat(means_invvars_, gauss);
out->DivElements(tmp);
}
template<class Real>
void DiagGmm::GetComponentVariance(int32 gauss, VectorBase<Real> *out) const {
KALDI_ASSERT(gauss < NumGauss());
KALDI_ASSERT(static_cast<int32>(out->Dim()) == Dim());
out->CopyRowFromMat(inv_vars_, gauss);
out->InvertElements();
}
} // End namespace kaldi
#endif // KALDI_GMM_DIAG_GMM_INL_H_
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