asptLbpef32f

API Summary

• DT32S lbpef32fInit(asptLbpef32f *lbpef, DT32S L, DT32F mu_p)
  
• DT32S lbpef32fInitStatic(asptLbpef32f *lbpef,DT32S L, DT32F mu_p, DT32F *pCof, DT32F *pDat)
  
• void lbpef32fFree(asptLbpef32f *lbpef)
  

• DT32F lbpef32fFilterUpdate(asptLbpef32f *lbpef, DT32F x)
  
• DT32F lbpef32fFilterOnly(asptLbpef32f *lbpef, DT32F x)
  

• DT32S lbpef32fGetCoef(asptLbpef32f *lbpef, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• DT32S lbpef32fGetParcor(asptLbpef32f *lbpef, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• DT32S lbpef32fGetDelayLine(asptLbpef32f *lbpef, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• lbpef32fGetCoefPtr( asptLbpef32f *lbpef )
• lbpef32fGetParcorPtr( asptLbpef32f *lbpef )
• lbpef32fGetDelayLinePtr( asptLbpef32f *lbpef )
• lbpef32fGetFilterLength( asptLbpef32f *lbpef )
• lbpef32fGetPcStepSize( asptLbpef32f *lbpef )
• lbpef32fGetLastErrorSample( asptLbpef32f *lbpef )
• lbpef32fGetFirFlag( asptLbpef32f *lbpef )

• DT32S lbpef32fReset(asptLbpef32f *lbpef)
  
• DT32S lbpef32fResize(asptLbpef32f *lbpef, DT32S newLength)
  
• DT32S lbpef32fSetCoef(asptLbpef32f *lbpef, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• DT32S lbpef32fSetParcor(asptLbpef32f *lbpef, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• DT32S lbpef32fSetDelayLine(asptLbpef32f *lbpef, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• lbpef32fSetPcStepSize( asptLbpef32f *lbpef, newStep )
• lbpef32fSetFirFlag( asptLbpef32f *lbpef, newFlag )

Description

Copyright

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lbpef32fInit

DT32S lbpef32fInit(asptLbpef32f *lbpef, DT32S L, DT32F mu_p)

Initializes an asptLbpef32f filter and allocates its necessary storage buffers
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter to be initializes
  • len : number of lattice stages
  • mu_p : PARCOR step size.
• Output Parameters :
  • lbpef is initialized using the given input arguments.
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_NULL_PTR_ERR : lbpef is a NULL pointer
  • ASPT_RANGE_ERR : len is not a valid input value
  • ASPT_NO_MEM_ERR : could not allocate memory

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lbpef32fInitStatic

DT32S lbpef32fInitStatic(asptLbpef32f *lbpef,DT32S L, DT32F mu_p, DT32F *pCof, DT32F *pDat)

Initializes an asptLbpef32f filter to use pre-allocated memory blocks
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter to be initializes
  • len : number of lattice stages
  • mu_p : PARCOR step size.
  • pCof : pointer to a pre-allocated memory in program memory of at least [2*len] DT32F locations to be used for the filter/PARCOR coefficients.
  • pDat : pointer to a pre-allocated memory in data memory of at least [4*(len+1)] DT32F locations to be used for data storage.
• Output Parameters :
  • lbpef is initialized using the given input arguments.
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_NULL_PTR_ERR : lbpef/pCof/pDat is a NULL pointer
  • ASPT_RANGE_ERR : len is not a valid input value
  • ASPT_NO_MEM_ERR : could not allocate memory

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lbpef32fFilterUpdate

DT32F lbpef32fFilterUpdate(asptLbpef32f *lbpef, DT32F x)

Calculates the filter output and updates the PARCOR and linear combiner coefficients of an asptLbpef32f filter.
• Returns :
  • The filter output.
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter.
  • x : input sample.
• Remarks :
  • The error sample is stored internally and can be retrieved by calling lbpef32fGetLastErrorSample().

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lbpef32fFilterOnly

DT32F lbpef32fFilterOnly(asptLbpef32f *lbpef, DT32F x)

Calculates the filter output but does not updates the PARCOR nor the linear combiner coefficients. It updates the internal buffers.
• Returns :
  • The filter output.
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter.
  • x : input sample.

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lbpef32fFree

void lbpef32fFree(asptLbpef32f *lbpef)

Frees the allocated memory for this asptLbpef32f filter.
• Returns :
  • void
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter
• Remarks :
  • Use this function only for asptLbpef32f filters created using lbpef32fInit(). Do not use with filters created with lmsLattice32fInitStatic().

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lbpef32fReset

DT32S lbpef32fReset(asptLbpef32f *lbpef)

Resets all PARCOR and linear combiner coefficients to zero.
• Returns :
  • Error code
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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lbpef32fGetCoef

DT32S lbpef32fGetCoef(asptLbpef32f *lbpef, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Copies N internal linear combiner coefficients starting from coef[ind] to dstBuf.
• Returns :
  • On success returns the number of coefficients copied, otherwise the error code (negative DT32S).
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter.
  • dstBuf : pointer to the destination buffer.
  • ind : index to the first coefficient to be copied.
  • N : number of coefficients to be copied.
  • flip : if 1, will flip the coefficients order
• Error Conditions
  • ASPT_NULL_PTR_ERR : dstBuf/lbpef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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lbpef32fSetCoef

DT32S lbpef32fSetCoef(asptLbpef32f *lbpef, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)

Initializes N internal linear combiner filter coefficients starting from coef[ind] to the contents of newCoef.
• Returns :
  • On success returns the number of coefficients copied, otherwise the error code (negative DT32S).
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter to be set.
  • newCoef : pointer to the new coefficients vector.
  • ind : index to the first coefficient to be set.
  • N : number of coefficients to be set.
  • flip : if 1, will flip the coefficients order.
• Error Conditions
  • ASPT_NULL_PTR_ERR : newCoef/lbpef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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lbpef32fGetParcor

DT32S lbpef32fGetParcor(asptLbpef32f *lbpef, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Copies N internal PARCOR coefficients starting from coef[ind] to dstBuf.
• Returns :
  • On success returns the number of coefficients copied, otherwise the error code (negative DT32S).
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter.
  • dstBuf : pointer to the destination buffer.
  • ind : index to the first coefficient to be copied.
  • N : number of coefficients to be copied.
  • flip : if 1, will flip the coefficients order.
• Error Conditions
  • ASPT_NULL_PTR_ERR : dstBuf/lbpef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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lbpef32fSetCoef

DT32S lbpef32fSetCoef(asptLbpef32f *lbpef, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)

Initializes N internal PARCOR filter coefficients starting from coef[ind] to the contents of newCoef.
• Returns :
  • On success returns the number of coefficients copied, otherwise the error code (negative DT32S).
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter to be set.
  • newCoef : pointer to the new PARCOR vector.
  • ind : index to the first coefficient to be set.
  • N : number of coefficients to be set.
  • flip : if 1, will flip the coefficients order.
• Error Conditions
  • ASPT_NULL_PTR_ERR : newCoef/lbpef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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lbpef32fGetDelayLine

DT32S lbpef32fGetDelayLine(asptLbpef32f *lbpef, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Copies the N internal backward prediction error samples starting from delayLine[ind] sample to the given array.
• Returns :
  • On success returns the number of samples copied, otherwise the error code (negative DT32S).
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter.
  • dstBuf : pointer to the destination buffer.
  • ind : index to the first sample to be copied.
  • N : number of samples to be copied.
  • flip : if 1, will flip the samples order.
• Error Conditions
  • ASPT_NULL_PTR_ERR : newCoef/lbpef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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lbpef32fSetDelayLine

DT32S lbpef32fSetDelayLine(asptLbpef32f *lbpef, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)

Initializes N internal backward prediction samples starting from delayLine[ind] to the contents of newBuf.
• Returns :
  • On success returns the number of coefficients copied, otherwise the error code (negative DT32S).
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter to be set.
  • newBuf : pointer to the new PARCOR vector.
  • ind : index to the first coefficient to be set.
  • N : number of coefficients to be set.
  • flip : if 1, will flip the coefficients order.
• Error Conditions
  • ASPT_NULL_PTR_ERR : newBuf/lbpef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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lbpef32fResize

DT32S lbpef32fResize(asptLbpef32f *lbpef, DT32S newLength)

Resizes an asptLbpef32f filter keeping as much of the filter state as possible.
• Returns :
  • Error code
• Input Parameters :
  • lbpef : pointer to asptLbpef32f filter to be resized.
  • newLen : required new filter length.
• Error Conditions
  • ASPT_NO_ERR : Resizing is successful
  • ASPT_NULL_PTR_ERR : NULL pointer error
  • ASPT_RANGE_ERR : newLength is not a valid input value
  • ASPT_NO_MEM_ERR : Could not allocate the necessary filter storage
• Remarks :
  • Use this function only with dynamically allocated asptLbpef32f filters.