arm_cfft_f32.c File Reference

Functions
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
	)

Parameters

[in,out]	pSrc	points to in-place buffer of unknown 32-bit data type
[in]	bitRevLen	bit reversal table length
[in]	pBitRevTab	points to bit reversal table

Returns

none

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