arm_rfft_q31.c File Reference

Functions
void	arm_split_rfft_q31 (q31_t *pSrc, uint32_t fftLen, q31_t *pATable, q31_t *pBTable, q31_t *pDst, uint32_t modifier)
	Core Real FFT process.
void	arm_split_rifft_q31 (q31_t *pSrc, uint32_t fftLen, q31_t *pATable, q31_t *pBTable, q31_t *pDst, uint32_t modifier)
	Core Real IFFT process.
void	arm_rfft_q31 (const arm_rfft_instance_q31 *S, q31_t *pSrc, q31_t *pDst)
	Processing function for the Q31 RFFT/RIFFT.

Function Documentation

void arm_split_rfft_q31	(	q31_t *	pSrc,
		uint32_t	fftLen,
		q31_t *	pATable,
		q31_t *	pBTable,
		q31_t *	pDst,
		uint32_t	modifier
	)

end of RealFFT group

Parameters

[in]	*pSrc	points to the input buffer.
[in]	fftLen	length of FFT.
[in]	*pATable	points to the twiddle Coef A buffer.
[in]	*pBTable	points to the twiddle Coef B buffer.
[out]	*pDst	points to the output buffer.
[in]	modifier	twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.

Returns

none.

References mult_32x32_keep32_R, multAcc_32x32_keep32_R, and multSub_32x32_keep32_R.

Referenced by arm_rfft_q31().

void arm_split_rifft_q31	(	q31_t *	pSrc,
		uint32_t	fftLen,
		q31_t *	pATable,
		q31_t *	pBTable,
		q31_t *	pDst,
		uint32_t	modifier
	)

Parameters

[in]	*pSrc	points to the input buffer.
[in]	fftLen	length of FFT.
[in]	*pATable	points to the twiddle Coef A buffer.
[in]	*pBTable	points to the twiddle Coef B buffer.
[out]	*pDst	points to the output buffer.
[in]	modifier	twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.

Returns

none.

References mult_32x32_keep32_R, multAcc_32x32_keep32_R, and multSub_32x32_keep32_R.

Referenced by arm_rfft_q31().