arm_cfft_radix4_f32.c File Reference

#include "arm_math.h"

Go to the source code of this file.

Functions
void	arm_cfft_radix4_f32 (const arm_cfft_radix4_instance_f32 *S, float32_t *pSrc)
void	arm_radix4_butterfly_f32 (float32_t *pSrc, uint16_t fftLen, float32_t *pCoef, uint16_t twidCoefModifier)
void	arm_radix4_butterfly_inverse_f32 (float32_t *pSrc, uint16_t fftLen, float32_t *pCoef, uint16_t twidCoefModifier, float32_t onebyfftLen)
void	arm_bitreversal_f32 (float32_t *pSrc, uint16_t fftSize, uint16_t bitRevFactor, uint16_t *pBitRevTab)

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Function Documentation

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.

end of CFFT_CIFFT group

Definition at line 223 of file arm_cfft_radix4_f32.c.

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.

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.

Definition at line 660 of file arm_cfft_radix4_f32.c.

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

In-place bit reversal function.

Parameters:

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

Returns:

none.

Definition at line 1177 of file arm_cfft_radix4_f32.c.