arm_cfft_radix2_q15.c File Reference

Functions
void	arm_cfft_radix2_q15 (const arm_cfft_radix2_instance_q15 *S, q15_t *pSrc)
	Processing function for the fixed-point CFFT/CIFFT.
void	arm_radix2_butterfly_q15 (q15_t *pSrc, uint32_t fftLen, q15_t *pCoef, uint16_t twidCoefModifier)
	Core function for the Radix-2 Q15 CFFT butterfly process.
void	arm_radix2_butterfly_inverse_q15 (q15_t *pSrc, uint32_t fftLen, q15_t *pCoef, uint16_t twidCoefModifier)
	Core function for the Radix-2 Q15 CFFT Inverse butterfly process.

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Function Documentation

void arm_radix2_butterfly_inverse_q15	(	q15_t *	pSrc,
		uint32_t	fftLen,
		q15_t *	pCoef,
		uint16_t	twidCoefModifier
	)

Parameters:

[in,out]	*pSrc	points to the in-place buffer of Q15 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.

Returns:

none.

References _SIMD32_OFFSET.

Referenced by arm_cfft_radix2_q15().

void arm_radix2_butterfly_q15	(	q15_t *	pSrc,
		uint32_t	fftLen,
		q15_t *	pCoef,
		uint16_t	twidCoefModifier
	)

end of Radix2_CFFT_CIFFT group

References _SIMD32_OFFSET.

Referenced by arm_cfft_radix2_q15().