asptFtrls32f

API Summary

• DT32S ftrls32fInit(asptFtrls32f *ftrls, DT32S L, DT32F mu)
  
• DT32S ftrls32fInitStatic(asptFtrls32f *ftrls, DT32S L, DT32F mu, DT32F *pCof, DT32F *pDat)
  
• void ftrls32fFree(asptFtrls32f *ftrls)
  

• DT32F ftrls32fFilterUpdate(asptFtrls32f *ftrls, DT32F inp, DT32F des)
  
• DT32F ftrls32fLCFilterUpdate(asptFtrls32f *ftrls, DT32F des)
  
• DT32F ftrls32fFilterOnly(asptFtrls32f *ftrls, DT32F inp)
  
• DT32F ftrls32fLCFilterOnly(asptFtrls32f *ftrls)
  

• DT32S ftrls32fGetCoef(asptFtrls32f *ftrls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• DT32S ftrls32fGetDelayLine(asptFtrls32f *ftrls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• ftrls32fGetCoefPtr( asptFtrls32f *ftrls )
• ftrls32fGetDelayLinePtr( asptFtrls32f *ftrls )
• ftrls32fGetGainPtr( asptFtrls32f *ftrls )
• ftrls32fGetForwardPredictorCoefPtr( asptFtrls32f *ftrls )
• ftrls32fGetBackwardPredictorCoefPtr( asptFtrls32f *ftrls )
• ftrls32fGetFilterLength( asptFtrls32f *ftrls )
• ftrls32fGetDelayLineLength( asptFtrls32f *ftrls )
• ftrls32fGetForgetFactor( asptFtrls32f *ftrls )
• ftrls32fGetLastErrorSample( asptFtrls32f *ftrls )

• DT32S ftrls32fReset(asptFtrls32f *ftrls)
  
• DT32S ftrls32fResetDelayLine(asptFtrls32f *ftrls)
  
• DT32S ftrls32fResize(asptFtrls32f *ftrls, DT32S newLength)
  
• DT32S ftrls32fSetCoef(asptFtrls32f *ftrls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• DT32S ftrls32fSetDelayLine(asptFtrls32f *ftrls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• ftrls32fSetForgetFactor( asptFtrls32f *ftrls, newFactor )

Description

Copyright

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ftrls32fInit

DT32S ftrls32fInit(asptFtrls32f *ftrls, DT32S L, DT32F mu)

Initializes an asptFtls32f filter and allocates its necessary storage buffers.
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • ftrls : asptFtls32f filter to be initialized
  • L : number of filter coefficients
  • mu : forgetting factor.
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_RANGE_ERR : L is not a valid input value
  • ASPT_NO_MEM_ERR : could not allocate memory

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ftrls32fInitStatic

DT32S ftrls32fInitStatic(asptFtrls32f *ftrls, DT32S L, DT32F mu, DT32F *pCof, DT32F *pDat)

Initializes an asptFtls32f filter to use pre-allocated memory.
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • ftrls : asptFtls32f filter to be initialized
  • L : number of filter coefficients
  • mu : forgetting factor.
  • pCof : pointer to a pre-allocated memory block to be used for the adaptive filter coefficients. At least [3*L + 2] memory locations must be available starting at this memory address.
  • pDat : pointer to a pre-allocated memory block to be used for data storage. At least [3*L + 2] memory locations must be available starting at this memory address
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_NULL_PTR_ERR : pCof/pDat is a NULL pointer
  • ASPT_RANGE_ERR : L is not a valid input value

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ftrls32fFilterUpdate

DT32F ftrls32fFilterUpdate(asptFtrls32f *ftrls, DT32F inp, DT32F des)

Calculates the filter output and updates the coefficients vector according to the Fast Transversal RLS algorithm.
• Returns :
  • The filter output sample.
• Input Parameters :
  • ftrls : pointer to asptFtls32f filter
  • inp : new input sample.
  • des : new desired sample
• Remarks :
  • The error sample is stored internally and can be retrieved by calling ftrls32fGetLastErrorSample().

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ftrls32fLCFilterUpdate

DT32F ftrls32fLCFilterUpdate(asptFtrls32f *ftrls, DT32F des)

Calculates the filter output and updates the coefficients vector according to the Fast Transversal RLS algorithm for the Linear Combiner filter configuration. Assumes the delay line is updated before calling this functions.
• Returns :
  • The filter output sample.
• Input Parameters :
  • ftrls : pointer to asptFtls32f filter
  • des : new desired sample
• Remarks :
  • The error sample is stored internally and can be retrieved by calling ftrls32fGetLastErrorSample().

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ftrls32fFilterOnly

DT32F ftrls32fFilterOnly(asptFtrls32f *ftrls, DT32F inp)

Calculates the filter output but does not updates the coefficients. It also updates the filter internal state vectors.
• Returns :
  • The filter output sample.
• Input Parameters :
  • ftrls : pointer to asptFtls32f filter
  • inp : new input sample.
• Remarks :
  • error sample is not calculated.

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ftrls32fLCFilterOnly

DT32F ftrls32fLCFilterOnly(asptFtrls32f *ftrls)

Calculates the filter output but does not updates the coefficients. It also updates the filter internal state vectors for the Linear Combiner filter configuration. Assumes the delay line is updated before calling this functions.
• Returns :
  • The filter output sample.
• Input Parameters :
  • ftrls : pointer to asptFtls32f filter
• Remarks :
  • error sample is not calculated.

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ftrls32fFree

void ftrls32fFree(asptFtrls32f *ftrls)

Frees the allocated memory for this asptFtrls32f filter.
• Returns :
  • void
• Input Parameters :
  • ftrls : pointer to asptFtls32f filter
• Remarks :
  • Use this function only with filters created with rls32fInit(). Do not use with asptRls32f filters created using rls32fInitStatic().

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ftrls32fReset

DT32S ftrls32fReset(asptFtrls32f *ftrls)

Resets all filter coefficients to zero.
• Returns :
  • Error code
• Input Parameters :
  • ftrls : pointer to asptFtrls32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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ftrls32fResetDelayLine

DT32S ftrls32fResetDelayLine(asptFtrls32f *ftrls)

Resets all internal delay lines to zero.
• Returns :
  • Error code
• Input Parameters :
  • ftrls : pointer to asptFtrls32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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ftrls32fGetCoef

DT32S ftrls32fGetCoef(asptFtrls32f *ftrls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Copies N internal filter coefficients starting from coef[ind] to dstBuf.
• Returns :
  • On success returns the number of coefficients copied, otherwise the error code (negative DT32S).
• Input Parameters :
  • ftrls : pointer to asptFtrls32f filter.
  • dstBuf : destination buffer.
  • ind : index to the first coefficient to be copied.
  • N : number of coefficients to be copied.
  • flip : if not 0, will flip the coefficients order
• Output Parameters :
  • dstBuf is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : dstBuf/ftrls->coef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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ftrls32fSetCoef

DT32S ftrls32fSetCoef(asptFtrls32f *ftrls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Initializes N internal filter coefficients starting from coef[ind] to the contents of newBuf.
• Returns :
  • On success returns the number of coefficients initialized, otherwise the error code (negative DT32S).
• Input Parameters :
  • ftrls : pointer to asptFtrls32f filter to be set.
  • newCoef : new coefficients vector.
  • ind : index to the first coefficient to be set.
  • N : number of coefficients to be set.
  • flip : if not 0, will copy the coefficients in reverse order
• Output Parameters :
  • ftrls->coef is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : newCoef/ftrls->coef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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ftrls32fGetDelayLine

DT32S ftrls32fGetDelayLine(asptFtrls32f *ftrls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Copies N internal delay line samples starting from delayLine[ind] to dstBuf.
• Returns :
  • On success returns the number of samples copied, otherwise the error code (negative DT32S).
• Input Parameters :
  • ftrls : pointer to asptFtrls32f filter.
  • dstBuf : destination buffer.
  • ind : index to the first sample to be copied.
  • N : number of samples to be copied.
  • flip : if not 0, will flip the samples order.
• Output Parameters :
  • dstBuf is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : dstBuf/ftrls->delayLine is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value
• Remarks :
  • Samples are stored in dstBuf with newest sample at index 0, and oldest at index N-1, when flip == 0.

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ftrls32fSetDelayLine

DT32S ftrls32fSetDelayLine(asptFtrls32f *ftrls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Initializes N internal delay line samples starting from delayLine[ind] to the contents of the given array.
• Returns :
  • On success returns the number of samples initialized, otherwise the error code (negative DT32S).
• Input Parameters :
  • ftrls : pointer to asptFtrls32f filter.
  • newBuf : new data buffer.
  • ind : index to the first sample to be copied.
  • N : number of samples to be copied.
  • flip : if not 0, will flip the samples order.
• Output Parameters :
  • ftrls->delayLine is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : newBuf/ftrls->delayLine is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value
• Remarks :
  • Samples assumed to be stored in newBuf with newest sample at index 0, and oldest at index N-1, when flip == 0.

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ftrls32fResize

DT32S ftrls32fResize(asptFtrls32f *ftrls, DT32S newLength)

Resizes an asptFtrls32f filter keeping as much of the filter state as possible.
• Returns :
  • Error code.
• Input Parameters :
  • ftrls : pointer to the asptFtrls32f filter to be resized.
  • newLen : required new filter length.
• Error Conditions
  • ASPT_NO_ERR : Resizing is success
  • 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 asptFtrls32f filters.