arm_cfft_radix4_f32.c File Reference

Functions
void	arm_bitreversal_f32 (float32_t *pSrc, uint16_t fftSize, uint16_t bitRevFactor, const uint16_t *pBitRevTab)
	In-place floating-point bit reversal function. More...
void	arm_radix4_butterfly_f32 (float32_t *pSrc, uint16_t fftLen, const float32_t *pCoef, uint16_t twidCoefModifier)
void	arm_radix4_butterfly_inverse_f32 (float32_t *pSrc, uint16_t fftLen, const float32_t *pCoef, uint16_t twidCoefModifier, float32_t onebyfftLen)
void	arm_cfft_radix4_f32 (const arm_cfft_radix4_instance_f32 *S, float32_t *pSrc)
	Processing function for the floating-point Radix-4 CFFT/CIFFT. More...

Function Documentation

void arm_bitreversal_f32	(	float32_t *	pSrc,
		uint16_t	fftSize,
		uint16_t	bitRevFactor,
		const uint16_t *	pBitRevTab
	)

Parameters

[in,out]	pSrc	points to in-place floating-point data buffer
[in]	fftSize	length of FFT
[in]	bitRevFactor	bit reversal modifier that supports different size FFTs with the same bit reversal table
[in]	pBitRevTab	points to bit reversal table

Returns

none

void arm_radix4_butterfly_f32	(	float32_t *	pSrc,
		uint16_t	fftLen,
		const float32_t *	pCoef,
		uint16_t	twidCoefModifier
	)

end of ComplexFFT group 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

void arm_radix4_butterfly_inverse_f32	(	float32_t *	pSrc,
		uint16_t	fftLen,
		const float32_t *	pCoef,
		uint16_t	twidCoefModifier,
		float32_t	onebyfftLen
	)

brief Core function for the floating-point CIFFT 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 twiddle coefficient buffer param[in] twidCoefModifier twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. param[in] onebyfftLen value of 1/fftLen return none