arm_fir_sparse_instance_q31 Struct Reference

Instance structure for the Q31 sparse FIR filter.

Data Fields
uint16_t	numTaps
uint16_t	stateIndex
q31_t *	pState
const q31_t *	pCoeffs
uint16_t	maxDelay
int32_t *	pTapDelay

Field Documentation

uint16_t maxDelay

maximum offset specified by the pTapDelay array.

uint16_t numTaps

number of coefficients in the filter.

const q31_t* pCoeffs

points to the coefficient array. The array is of length numTaps.

q31_t* pState

points to the state buffer array. The array is of length maxDelay+blockSize-1.

int32_t* pTapDelay

points to the array of delay values. The array is of length numTaps.

uint16_t stateIndex

state buffer index. Points to the oldest sample in the state buffer.