OnlineMatrixInput Class Reference

Inheritance diagram for OnlineMatrixInput:

Collaboration diagram for OnlineMatrixInput:

Public Member Functions
	OnlineMatrixInput (const Matrix< BaseFloat > &feats)
virtual int32	Dim () const
virtual bool	Compute (Matrix< BaseFloat > *output)
Public Member Functions inherited from OnlineFeatInputItf
virtual	~OnlineFeatInputItf ()

Private Attributes
int32	position_
Matrix< BaseFloat >	feats_

Detailed Description

Definition at line 30 of file online-feat-test.cc.

Constructor & Destructor Documentation

OnlineMatrixInput()

OnlineMatrixInput ( const Matrix< BaseFloat > &  feats )

inline

Definition at line 32 of file online-feat-test.cc.

                                                   :
      position_(0), feats_(feats) { }

Member Function Documentation

Compute()

virtual bool Compute ( Matrix< BaseFloat > *  output )

inlinevirtual

Implements OnlineFeatInputItf.

Definition at line 37 of file online-feat-test.cc.

References MatrixBase< Real >::CopyFromMat(), OnlineMatrixInput::feats_, KALDI_ASSERT, MatrixBase< Real >::NumCols(), MatrixBase< Real >::NumRows(), OnlineMatrixInput::position_, kaldi::Rand(), MatrixBase< Real >::Range(), and Matrix< Real >::Resize().

                                                  {
    if (feats_.NumRows() == 0) { // empty input.
      output->Resize(0, 0);
      return false;
    }
    
    KALDI_ASSERT(output->NumRows() > 0 &&
                 output->NumCols() == feats_.NumCols());
    
    // Because this is a kind of stress test, we completely ignore
    // the number of frames requested, and return whatever number of
    // frames we please.

    int32 num_frames_left = feats_.NumRows() - position_;
    int32 num_frames_return = std::min((Rand() % 5), num_frames_left);
    if (num_frames_return == 0) {
      output->Resize(0, 0);
    } else {
      output->Resize(num_frames_return, feats_.NumCols());
      output->CopyFromMat(feats_.Range(position_, num_frames_return,
                                       0, feats_.NumCols()));
    }
    position_ += num_frames_return;
    if (position_ == feats_.NumRows()) return false;
    else return true;
  }

Dim()

virtual int32 Dim ( ) const

inlinevirtual

Implements OnlineFeatInputItf.

Definition at line 35 of file online-feat-test.cc.

References OnlineMatrixInput::feats_, and MatrixBase< Real >::NumCols().

{ return feats_.NumCols(); }

Member Data Documentation

feats_

Matrix<BaseFloat> feats_

private

Definition at line 66 of file online-feat-test.cc.

Referenced by OnlineMatrixInput::Compute(), and OnlineMatrixInput::Dim().

position_

int32 position_

private

Definition at line 65 of file online-feat-test.cc.

Referenced by OnlineMatrixInput::Compute().

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The documentation for this class was generated from the following file:

• online/online-feat-test.cc