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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]*pSrcpoints to the input buffer.
[in]fftLenlength of FFT.
[in]*pATablepoints to the twiddle Coef A buffer.
[in]*pBTablepoints to the twiddle Coef B buffer.
[out]*pDstpoints to the output buffer.
[in]modifiertwiddle 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]*pSrcpoints to the input buffer.
[in]fftLenlength of FFT.
[in]*pATablepoints to the twiddle Coef A buffer.
[in]*pBTablepoints to the twiddle Coef B buffer.
[out]*pDstpoints to the output buffer.
[in]modifiertwiddle 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().