asptVsslms32f

API Summary

• DT32S vsslms32fInit (asptVsslms32f *vsslms,DT32S L, DT32F mu, DT32F minMu, DT32F maxMu, DT32S SF)
  
• DT32S vsslms32fInitStatic(asptVsslms32f *vsslms,DT32S L, DT32F mu, DT32F minMu, DT32F maxMu, DT32S SF, DT32F *pCof, DT32F *pDat)
  
• void vsslms32fFree(asptVsslms32f *vsslms)
  

• DT32F vsslms32fFilterUpdate(asptVsslms32f *vsslms, DT32F inp, DT32F des)
  
• DT32F vsslms32fFilterOnly (asptVsslms32f *vsslms, DT32F inp)
  
• DT32F vsslms32fLCFilterUpdate(asptVsslms32f *vsslms, DT32F des)
  
• DT32F vsslms32fLCFilterOnly (asptVsslms32f *vsslms)
  

• DT32S vsslms32fGetCoef(asptVsslms32f *vsslms, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• DT32S vsslms32fGetDelayLine(asptVsslms32f *vsslms, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• vsslms32fGetCoefPtr( asptVsslms32f *vsslms )
• vsslms32fGetStepSizePtr( asptVsslms32f *vsslms )
• vsslms32fGetFilterLength( asptVsslms32f *vsslms )
• vsslms32fGetDelayLineLength( asptVsslms32f *vsslms )
• vsslms32fGetLastErrorSample( asptVsslms32f *vsslms )
• vsslms32fGetStepSize( asptVsslms32f *vsslms,n )
• vsslms32fGetMinStepSize( asptVsslms32f *vsslms )
• vsslms32fGetMaxStepSize( asptVsslms32f *vsslms )
• vsslms32fGetSignFlag( asptVsslms32f *vsslms )

• DT32S vsslms32fReset(asptVsslms32f *vsslms)
  
• DT32S vsslms32fResetDelayLine(asptVsslms32f *vsslms)
  
• DT32S vsslms32fResize(asptVsslms32f *vsslms, DT32S newLength)
  
• DT32S vsslms32fSetCoef(asptVsslms32f *vsslms, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• DT32S vsslms32fSetDelayLine(asptVsslms32f *vsslms, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• vsslms32fSetStepSize( asptVsslms32f *vsslms32f, n, newStep )
• vsslms32fSetMinStepSize( asptVsslms32f *vsslms32f, a )
• vsslms32fSetMaxStepSize( asptVsslms32f *vsslms32f, b )
• vsslms32fSetSignFlag( asptVsslms32f *vsslms32f, c )

Description

Copyright

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vsslms32fInit

DT32S vsslms32fInit (asptVsslms32f *vsslms,DT32S L, DT32F mu, DT32F minMu, DT32F maxMu, DT32S SF)

Initializes an asptVsslms32f filter and allocates its necessary storage buffers.
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • vsslms : asptVsslms32f filter to be initialized
  • L : number of filter coefficients
  • mu : initial step size.
  • minMu : lower bound for stepSize
  • maxMu : higher bound for stepSize.
  • SF : if 1, sign-sign algorithm is used to update the stepSize
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_RANGE_ERR : L/minMu/maxMu is not a valid input value
  • ASPT_NO_MEM_ERR : could not allocate memory

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vsslms32fInitStatic

DT32S vsslms32fInitStatic(asptVsslms32f *vsslms,DT32S L, DT32F mu, DT32F minMu, DT32F maxMu, DT32S SF, DT32F *pCof, DT32F *pDat)

Initializes an asptVsslms32f filter to use pre-allocated memory.
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • vsslms : asptVsslms32f filter to be initialized
  • L : number of filter coefficients
  • mu : initial step size
  • minMu : lower bound for stepSize
  • maxMu : higher bound for stepSize
  • SF : if 1, sign-sign algorithm is used to update the stepSize
  • pCof : pointer to a pre-allocated memory block to be used for the adaptive filter coefficients. At least L 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 memory locations must be available starting at this memory address
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_RANGE_ERR : L/minMu/maxMu is not a valid input value
  • ASPT_NULL_PTR_ERR : pDat/pCof is a NULL pointer

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vsslms32fFilterUpdate

DT32F vsslms32fFilterUpdate(asptVsslms32f *vsslms, DT32F inp, DT32F des)

Calculates the filter output and updates the coefficients vector according to the Variable Step Size LMS algorithm.
• Returns :
  • The filter output sample.
• Input Parameters :
  • vsslms : pointer to the asptVsslms32f filter
  • inp : new input sample.
  • des : new desired sample
• Remarks :
  • The error sample is stored internally and can be retrieved by calling vsslms32fGetLastErrorSample().

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vsslms32fFilterOnly

DT32F vsslms32fFilterOnly (asptVsslms32f *vsslms, DT32F inp)

Calculates the filter output but does not updates the coefficients.
• Returns :
  • The filter output sample.
• Input Parameters :
  • vsslms : pointer to the asptVsslms32f filter
  • inp : new input sample.
• Remarks :
  • error sample is not calculated.

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vsslms32fLCFilterUpdate

DT32F vsslms32fLCFilterUpdate(asptVsslms32f *vsslms, DT32F des)

Calculates the filter output and updates the coefficients vector according to the Variable Step Size LMS algorithm for the Linear Combiner filter configuration. Assumes the delay line has been already updated before calling this function.
• Returns :
  • The filter output sample.
• Input Parameters :
  • vsslms : pointer to the asptVsslms32f filter
  • des : new desired sample
• Remarks :
  • The error sample is stored internally and can be retrieved by calling vsslms32fGetLastErrorSample().

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vsslms32fLCFilterOnly

DT32F vsslms32fLCFilterOnly (asptVsslms32f *vsslms)

Calculates the filter output but does not updates the coefficients. It also updates the input power for the Linear Combiner filter configuration. Assumes the delay line has been already updated before calling this function.
• Returns :
  • The filter output sample.
• Input Parameters :
  • vsslms : pointer to the asptVsslms32f filter
• Remarks :
  • Error sample is not calculated.

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vsslms32fFree

void vsslms32fFree(asptVsslms32f *vsslms)

Frees the allocated memory for this asptVsslms32f filter.
• Returns :
  • void
• Input Parameters :
  • vsslms : pointer to the asptVsslms32f filter
• Remarks :
  • Use this function only with filters created with vsslms32fInit(). Do not use with asptVsslms32f filters created using vsslms32fInitStatic().

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vsslms32fReset

DT32S vsslms32fReset(asptVsslms32f *vsslms)

Resets all filter coefficients to zero.
• Returns :
  • Error code
• Input Parameters :
  • vsslms : pointer to an asptVsslms32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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vsslms32fResetDelayLine

DT32S vsslms32fResetDelayLine(asptVsslms32f *vsslms)

Resets all internal delay lines to zero.
• Returns :
  • Error code
• Input Parameters :
  • vsslms : pointer to an asptVsslms32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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vsslms32fGetCoef

DT32S vsslms32fGetCoef(asptVsslms32f *vsslms, 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 int).
• Input Parameters :
  • vsslms : pointer to an asptVsslms32f 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/vsslms->coef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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vsslms32fSetCoef

DT32S vsslms32fSetCoef(asptVsslms32f *vsslms, DT32F *newCoef, 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 int).
• Input Parameters :
  • vsslms : pointer to an asptVsslms32f 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 :
  • vsslms->coef is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : newCoef/vsslms->coef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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vsslms32fGetDelayLine

DT32S vsslms32fGetDelayLine(asptVsslms32f *vsslms, 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 int).
• Input Parameters :
  • vsslms : pointer to the asptVsslms32f 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/vsslms->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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vsslms32fSetDelayLine

DT32S vsslms32fSetDelayLine(asptVsslms32f *vsslms, DT32F *newCoef, 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 int).
• Input Parameters :
  • vsslms : pointer to an asptVsslms32f 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 :
  • vsslms->delayLine is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : newBuf/vsslms->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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vsslms32fResize

DT32S vsslms32fResize(asptVsslms32f *vsslms, DT32S newLength)

Resizes an asptVsslms32f filter keeping as much of the filter state as possible.
• Returns :
  • Error code.
• Input Parameters :
  • vsslms : pointer to the asptVsslms32f 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 asptVsslms32f filters.