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arm_cfft_f32.c File Reference


void arm_radix8_butterfly_f32 (float32_t *pSrc, uint16_t fftLen, const float32_t *pCoef, uint16_t twidCoefModifier)
void arm_bitreversal_32 (uint32_t *pSrc, const uint16_t bitRevLen, const uint16_t *pBitRevTable)
 In-place 32 bit reversal function. More...
void arm_cfft_radix8by2_f32 (arm_cfft_instance_f32 *S, float32_t *p1)
void arm_cfft_radix8by4_f32 (arm_cfft_instance_f32 *S, float32_t *p1)
void arm_cfft_f32 (const arm_cfft_instance_f32 *S, float32_t *p1, uint8_t ifftFlag, uint8_t bitReverseFlag)
 Processing function for the floating-point complex FFT. More...

Function Documentation

void arm_bitreversal_32 ( uint32_t *  pSrc,
const uint16_t  bitRevLen,
const uint16_t *  pBitRevTab 
[in,out]pSrcpoints to in-place buffer of unknown 32-bit data type
[in]bitRevLenbit reversal table length
[in]pBitRevTabpoints to bit reversal table
void arm_cfft_radix8by2_f32 ( arm_cfft_instance_f32 S,
float32_t p1 
void arm_cfft_radix8by4_f32 ( arm_cfft_instance_f32 S,
float32_t p1 
void arm_radix8_butterfly_f32 ( float32_t pSrc,
uint16_t  fftLen,
const float32_t pCoef,
uint16_t  twidCoefModifier 

brief Core function for the floating-point CFFT butterfly process. param[in,out] pSrc points to the in-place buffer of floating-point data type. param[in] fftLen length of the FFT. param[in] pCoef points to the twiddle coefficient buffer. param[in] twidCoefModifier twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. return none