FIR_Interpolate

Collaboration diagram for FIR_Interpolate:

Functions
tpt_status	tpt_fir_interpolate_init_f32 (tpt_fir_interpolate_f32_t *aFilter, uint8_t L, uint16_t numTaps, f32_t *pCoeffs, f32_t *pState, uint32_t aCount)
	Initialization function for the floating-point FIR interpolator. More...
tpt_status	tpt_fir_interpolate_init_q15 (tpt_fir_interpolate_q15_t *aFilter, uint8_t L, uint16_t numTaps, q15_t *pCoeffs, q15_t *pState, uint32_t aCount)
	Initialization function for the Q15 FIR interpolator. More...
tpt_status	tpt_fir_interpolate_init_q31 (tpt_fir_interpolate_q31_t *aFilter, uint8_t L, uint16_t numTaps, q31_t *pCoeffs, q31_t *pState, uint32_t aCount)
	Initialization function for the Q31 FIR interpolator. More...

Detailed Description

Function Documentation

tpt_fir_interpolate_init_f32()

tpt_status tpt_fir_interpolate_init_f32	(	tpt_fir_interpolate_f32_t *	aFilter,
		uint8_t	L,
		uint16_t	numTaps,
		f32_t *	pCoeffs,
		f32_t *	pState,
		uint32_t	aCount
	)

Initialization function for the floating-point FIR interpolator.

Parameters

[in,out]	aFilter	points to an instance of the floating-point FIR interpolator structure
[in]	L	upsample factor
[in]	numTaps	number of filter coefficients in the filter
[in]	pCoeffs	points to the filter coefficient buffer
[in]	pState	points to the state buffer
[in]	aCount	number of input samples to process per call

Returns

execution status TPT_MATH_SUCCESS : Operation successful TPT_MATH_ARGUMENT_ERROR : filter length numTaps is not a multiple of the interpolation factor L

Details

pCoeffs points to the array of filter coefficients stored in time reversed order: pre> {b[numTaps-1], b[numTaps-2], b[numTaps-2], ..., b[1], b[0]} /pre>

The length of the filter numTaps must be a multiple of the interpolation factor L.

pState points to the array of state variables. pState is of length (numTaps/L)+blockSize-1 words where blockSize is the number of input samples processed by each call to tpt_fir_interpolate_f32().

tpt_fir_interpolate_init_q15()

tpt_status tpt_fir_interpolate_init_q15	(	tpt_fir_interpolate_q15_t *	aFilter,
		uint8_t	L,
		uint16_t	numTaps,
		q15_t *	pCoeffs,
		q15_t *	pState,
		uint32_t	aCount
	)

Initialization function for the Q15 FIR interpolator.

Parameters

[in,out]	aFilter	points to an instance of the Q15 FIR interpolator structure
[in]	L	upsample factor
[in]	numTaps	number of filter coefficients in the filter
[in]	pCoeffs	points to the filter coefficient buffer
[in]	pState	points to the state buffer
[in]	aCount	number of input samples to process per call

Returns

execution status TPT_MATH_SUCCESS : Operation successful TPT_MATH_ARGUMENT_ERROR : filter length numTaps is not a multiple of the interpolation factor L

Details

pCoeffs points to the array of filter coefficients stored in time reversed order: pre> {b[numTaps-1], b[numTaps-2], b[numTaps-2], ..., b[1], b[0]} /pre>

The length of the filter numTaps must be a multiple of the interpolation factor L.

pState points to the array of state variables. pState is of length (numTaps/L)+blockSize-1 words where blockSize is the number of input samples processed by each call to tpt_fir_interpolate_q15().

tpt_fir_interpolate_init_q31()

tpt_status tpt_fir_interpolate_init_q31	(	tpt_fir_interpolate_q31_t *	aFilter,
		uint8_t	L,
		uint16_t	numTaps,
		q31_t *	pCoeffs,
		q31_t *	pState,
		uint32_t	aCount
	)

Initialization function for the Q31 FIR interpolator.

Parameters

[in,out]	aFilter	points to an instance of the Q31 FIR interpolator structure
[in]	L	upsample factor
[in]	numTaps	number of filter coefficients in the filter
[in]	pCoeffs	points to the filter coefficient buffer
[in]	pState	points to the state buffer
[in]	aCount	number of input samples to process per call

Returns

execution status TPT_MATH_SUCCESS : Operation successful TPT_MATH_ARGUMENT_ERROR : filter length numTaps is not a multiple of the interpolation factor L

Details

pCoeffs points to the array of filter coefficients stored in time reversed order: pre> {b[numTaps-1], b[numTaps-2], b[numTaps-2], ..., b[1], b[0]} /pre>

The length of the filter numTaps must be a multiple of the interpolation factor L.

pState points to the array of state variables. pState is of length (numTaps/L)+blockSize-1 words where blockSize is the number of input samples processed by each call to tpt_fir_interpolate_q31().