#include <decodable-matrix.h>

Inheritance diagram for DecodableMatrixScaled:

Collaboration diagram for DecodableMatrixScaled:

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Public Member Functions
	DecodableMatrixScaled (const Matrix< BaseFloat > &likes, BaseFloat scale)

virtual int32	NumFramesReady () const
	The call NumFramesReady() will return the number of frames currently available for this decodable object. More...

virtual bool	IsLastFrame (int32 frame) const
	Returns true if this is the last frame. More...

virtual BaseFloat	LogLikelihood (int32 frame, int32 index)
	Returns the log likelihood, which will be negated in the decoder. More...

virtual int32	NumIndices () const
	Returns the number of states in the acoustic model (they will be indexed one-based, i.e. More...

Public Member Functions inherited from DecodableInterface
virtual	~DecodableInterface ()

Private Member Functions
	KALDI_DISALLOW_COPY_AND_ASSIGN (DecodableMatrixScaled)

Private Attributes
const Matrix< BaseFloat > &	likes_

BaseFloat	scale_

Detailed Description

Definition at line 212 of file decodable-matrix.h.

Constructor & Destructor Documentation

◆ DecodableMatrixScaled()

DecodableMatrixScaled	(	const Matrix< BaseFloat > &	likes,
		BaseFloat	scale
	)

inline

Definition at line 214 of file decodable-matrix.h.

215 :

216 likes_(likes), scale_(scale) { }

kaldi::DecodableMatrixScaled::scale_

BaseFloat scale_

Definition: decodable-matrix.h:240

kaldi::DecodableMatrixScaled::likes_

const Matrix< BaseFloat > & likes_

Definition: decodable-matrix.h:239

Member Function Documentation

◆ IsLastFrame()

virtual bool IsLastFrame ( int32 frame ) const

inlinevirtual

Returns true if this is the last frame.

Frames are zero-based, so the first frame is zero. IsLastFrame(-1) will return false, unless the file is empty (which is a case that I'm not sure all the code will handle, so be careful). Caution: the behavior of this function in an online setting is being changed somewhat. In future it may return false in cases where we haven't yet decided to terminate decoding, but later true if we decide to terminate decoding. The plan in future is to rely more on NumFramesReady(), and in future, IsLastFrame() would always return false in an online-decoding setting, and would only return true in a decoding-from-matrix setting where we want to allow the last delta or LDA features to be flushed out for compatibility with the baseline setup.

Implements DecodableInterface.

Definition at line 220 of file decodable-matrix.h.

References KALDI_ASSERT, and DecodableMatrixScaledMapped::NumFramesReady().

                                               {
     KALDI_ASSERT(frame < NumFramesReady());
     return (frame == NumFramesReady() - 1);
   }

◆ KALDI_DISALLOW_COPY_AND_ASSIGN()

KALDI_DISALLOW_COPY_AND_ASSIGN ( DecodableMatrixScaled )

private

◆ LogLikelihood()

virtual BaseFloat LogLikelihood	(	int32	frame,
		int32	index
	)

inlinevirtual

Returns the log likelihood, which will be negated in the decoder.

The "frame" starts from zero. You should verify that NumFramesReady() > frame before calling this.

Implements DecodableInterface.

Definition at line 226 of file decodable-matrix.h.

References KALDI_ERR, DecodableMatrixScaledMapped::likes_, MatrixBase< Real >::NumCols(), MatrixBase< Real >::NumRows(), and DecodableMatrixScaledMapped::scale_.

                                                             {
     if (index > likes_.NumCols() || index <= 0 ||
         frame < 0 || frame >= likes_.NumRows())
       KALDI_ERR << "Invalid (frame, index - 1) = ("
                 << frame << ", " << index - 1 << ") for matrix of size "
                 << likes_.NumRows() << " x " << likes_.NumCols();
     return scale_ * likes_(frame, index - 1);
   }

◆ NumFramesReady()

virtual int32 NumFramesReady ( ) const

inlinevirtual

The call NumFramesReady() will return the number of frames currently available for this decodable object.

This is for use in setups where you don't want the decoder to block while waiting for input. This is newly added as of Jan 2014, and I hope, going forward, to rely on this mechanism more than IsLastFrame to know when to stop decoding.

Reimplemented from DecodableInterface.

Definition at line 218 of file decodable-matrix.h.

References DecodableMatrixScaledMapped::likes_, and MatrixBase< Real >::NumRows().

218 { return likes_.NumRows(); }

kaldi::DecodableMatrixScaled::likes_

const Matrix< BaseFloat > & likes_

Definition: decodable-matrix.h:239

kaldi::MatrixBase::NumRows

MatrixIndexT NumRows() const

Returns number of rows (or zero for empty matrix).

Definition: kaldi-matrix.h:64