arm_cfft_radix4_q15.c File Reference

#include "arm_math.h"

Go to the source code of this file.

Functions
void	arm_cfft_radix4_q15 (const arm_cfft_radix4_instance_q15 *S, q15_t *pSrc)
void	arm_radix4_butterfly_q15 (q15_t *pSrc16, uint32_t fftLen, q15_t *pCoef16, uint32_t twidCoefModifier)
void	arm_radix4_butterfly_inverse_q15 (q15_t *pSrc16, uint32_t fftLen, q15_t *pCoef16, uint32_t twidCoefModifier)
void	arm_bitreversal_q15 (q15_t *pSrc16, uint32_t fftLen, uint16_t bitRevFactor, uint16_t *pBitRevTab)

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Function Documentation

void arm_radix4_butterfly_q15	(	q15_t *	pSrc16,
		uint32_t	fftLen,
		q15_t *	pCoef16,
		uint32_t	twidCoefModifier
	)

Core function for the Q15 CFFT butterfly process.

end of CFFT_CIFFT group

Parameters:

[in,out]	*pSrc16	points to the in-place buffer of Q15 data type.
[in]	fftLen	length of the FFT.
[in]	*pCoef16	points to twiddle coefficient buffer.
[in]	twidCoefModifier	twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.

Returns:

none.

Definition at line 127 of file arm_cfft_radix4_q15.c.

void arm_radix4_butterfly_inverse_q15	(	q15_t *	pSrc16,
		uint32_t	fftLen,
		q15_t *	pCoef16,
		uint32_t	twidCoefModifier
	)

Core function for the Q15 CIFFT butterfly process.

Parameters:

[in,out]	*pSrc16	points to the in-place buffer of Q15 data type.
[in]	fftLen	length of the FFT.
[in]	*pCoef16	points to twiddle coefficient buffer.
[in]	twidCoefModifier	twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.

Returns:

none.

Definition at line 630 of file arm_cfft_radix4_q15.c.

void arm_bitreversal_q15	(	q15_t *	pSrc,
		uint32_t	fftLen,
		uint16_t	bitRevFactor,
		uint16_t *	pBitRevTab
	)

In-place bit reversal function.

Parameters:

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

Definition at line 1089 of file arm_cfft_radix4_q15.c.