arm_cfft_radix4_f32.c File Reference

Functions
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.
void	arm_radix4_butterfly_f32 (float32_t *pSrc, uint16_t fftLen, float32_t *pCoef, uint16_t twidCoefModifier)
	Core function for the floating-point CFFT butterfly process.
void	arm_radix4_butterfly_inverse_f32 (float32_t *pSrc, uint16_t fftLen, float32_t *pCoef, uint16_t twidCoefModifier, float32_t onebyfftLen)
	Core function for the floating-point CIFFT butterfly process.

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Function Documentation

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

end of Radix4_CFFT_CIFFT group

Referenced by arm_cfft_radix4_f32(), and arm_rfft_f32().

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

Parameters:

[in,out]	*pSrc	points to the in-place buffer of floating-point data type.
[in]	fftLen	length of the FFT.
[in]	*pCoef	points to twiddle coefficient buffer.
[in]	twidCoefModifier	twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
[in]	onebyfftLen	value of 1/fftLen.

Returns:

none.

Referenced by arm_cfft_radix4_f32(), and arm_rfft_f32().