#include <decodable-sum.h>

Inheritance diagram for DecodableSum:

Collaboration diagram for DecodableSum:

Public Member Functions
	DecodableSum (DecodableInterface d1, BaseFloat w1, DecodableInterface d2, BaseFloat w2)

	DecodableSum (const std::vector< std::pair< DecodableInterface *, BaseFloat > > &decodables)

void	CheckSizes () const

virtual BaseFloat	LogLikelihood (int32 frame, int32 state_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...

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

Public Member Functions inherited from DecodableInterface
virtual int32	NumFramesReady () const
	The call NumFramesReady() will return the number of frames currently available for this decodable object. More...

virtual	~DecodableInterface ()

Private Member Functions
	KALDI_DISALLOW_COPY_AND_ASSIGN (DecodableSum)

Private Attributes
std::vector< std::pair< DecodableInterface *, BaseFloat > >	decodables_

Detailed Description

Definition at line 36 of file decodable-sum.h.

Constructor & Destructor Documentation

◆ DecodableSum() [1/2]

DecodableSum	(	DecodableInterface *	d1,
		BaseFloat	w1,
		DecodableInterface *	d2,
		BaseFloat	w2
	)

inline

Definition at line 40 of file decodable-sum.h.

References DecodableSum::CheckSizes(), and DecodableSum::decodables_.

                                                      {
     decodables_.push_back(std::make_pair(d1, w1));
     decodables_.push_back(std::make_pair(d2, w2));
     CheckSizes();
   }

◆ DecodableSum() [2/2]

DecodableSum ( const std::vector< std::pair< DecodableInterface *, BaseFloat > > & decodables )

inline

Definition at line 48 of file decodable-sum.h.

References DecodableSum::CheckSizes().

49 :

50 decodables_(decodables) { CheckSizes(); }

kaldi::DecodableSum::CheckSizes

void CheckSizes() const

Definition: decodable-sum.h:52

kaldi::DecodableSum::decodables_

std::vector< std::pair< DecodableInterface *, BaseFloat > > decodables_

Definition: decodable-sum.h:82

Member Function Documentation

◆ CheckSizes()

void CheckSizes ( ) const

inline

Definition at line 52 of file decodable-sum.h.

References DecodableSum::decodables_, rnnlm::i, and KALDI_ASSERT.

Referenced by DecodableSum::DecodableSum().

                           {
     KALDI_ASSERT(decodables_.size() >= 1
                  && decodables_[0].first != NULL);
     for (size_t i = 1; i < decodables_.size(); i++)
       KALDI_ASSERT(decodables_[i].first != NULL &&
                    decodables_[i].first->NumIndices() ==
                    decodables_[0].first->NumIndices());
   }

◆ 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 76 of file decodable-sum.h.

References DecodableSum::decodables_.

                                               {
     // We require all the decodables have the same #frames.  We don't check this though.
     return decodables_[0].first->IsLastFrame(frame);
   }

◆ KALDI_DISALLOW_COPY_AND_ASSIGN()

KALDI_DISALLOW_COPY_AND_ASSIGN ( DecodableSum )

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.

Reimplemented in DecodableSumScaled.

Definition at line 63 of file decodable-sum.h.

References DecodableSum::decodables_.

Referenced by DecodableSumScaled::LogLikelihood().

                                                                   {
     BaseFloat sum = 0.0;
     // int32 i=1;
     for (std::vector<std::pair<DecodableInterface*, BaseFloat> >::iterator iter = decodables_.begin();
          iter != decodables_.end();
          ++iter) {
       sum += iter->first->LogLikelihood(frame, state_index) * iter->second;
      }
     return sum;
   }