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arm_cfft_radix4_q31.c File Reference

Functions

void arm_radix4_butterfly_inverse_q31 (q31_t *pSrc, uint32_t fftLen, const q31_t *pCoef, uint32_t twidCoefModifier)
 Core function for the Q31 CIFFT butterfly process. More...
 
void arm_radix4_butterfly_q31 (q31_t *pSrc, uint32_t fftLen, const q31_t *pCoef, uint32_t twidCoefModifier)
 Core function for the Q31 CFFT butterfly process. More...
 
void arm_bitreversal_q31 (q31_t *pSrc, uint32_t fftLen, uint16_t bitRevFactor, const uint16_t *pBitRevTab)
 In-place Q31 bit reversal function. More...
 
void arm_cfft_radix4_q31 (const arm_cfft_radix4_instance_q31 *S, q31_t *pSrc)
 Processing function for the Q31 CFFT/CIFFT. More...
 

Function Documentation

void arm_bitreversal_q31 ( q31_t pSrc,
uint32_t  fftLen,
uint16_t  bitRevFactor,
const uint16_t *  pBitRevTab 
)
Parameters
[in,out]pSrcpoints to in-place Q31 data buffer.
[in]fftLenlength of FFT.
[in]bitRevFactorbit reversal modifier that supports different size FFTs with the same bit reversal table
[in]pBitRevTabpoints to bit reversal table
Returns
none
void arm_radix4_butterfly_inverse_q31 ( q31_t pSrc,
uint32_t  fftLen,
const q31_t pCoef,
uint32_t  twidCoefModifier 
)
Parameters
[in,out]pSrcpoints to the in-place buffer of Q31 data type.
[in]fftLenlength of the FFT.
[in]pCoefpoints to twiddle coefficient buffer.
[in]twidCoefModifiertwiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
Returns
none
void arm_radix4_butterfly_q31 ( q31_t pSrc,
uint32_t  fftLen,
const q31_t pCoef,
uint32_t  twidCoefModifier 
)

end of ComplexFFT group

Parameters
[in,out]pSrcpoints to the in-place buffer of Q31 data type.
[in]fftLenlength of the FFT.
[in]pCoefpoints to twiddle coefficient buffer.
[in]twidCoefModifiertwiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
Returns
none