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CMSIS-DSP
Version 1.4.2
CMSIS DSP Software Library
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Functions | |
void | arm_radix4_butterfly_inverse_q31 (q31_t *pSrc, uint32_t fftLen, q31_t *pCoef, uint32_t twidCoefModifier) |
Core function for the Q31 CIFFT butterfly process. | |
void | arm_radix4_butterfly_q31 (q31_t *pSrc, uint32_t fftLen, q31_t *pCoef, uint32_t twidCoefModifier) |
Core function for the Q31 CFFT butterfly process. | |
void | arm_bitreversal_q31 (q31_t *pSrc, uint32_t fftLen, uint16_t bitRevFactor, uint16_t *pBitRevTab) |
void | arm_split_rfft_q31 (q31_t *pSrc, uint32_t fftLen, q31_t *pATable, q31_t *pBTable, q31_t *pDst, uint32_t modifier) |
Core Real FFT process. | |
void | arm_split_rifft_q31 (q31_t *pSrc, uint32_t fftLen, q31_t *pATable, q31_t *pBTable, q31_t *pDst, uint32_t modifier) |
Core Real IFFT process. | |
void | arm_rfft_q31 (const arm_rfft_instance_q31 *S, q31_t *pSrc, q31_t *pDst) |
Processing function for the Q31 RFFT/RIFFT. | |
void arm_bitreversal_q31 | ( | q31_t * | pSrc, |
uint32_t | fftLen, | ||
uint16_t | bitRevFactor, | ||
uint16_t * | pBitRevTab | ||
) |
Referenced by arm_cfft_radix2_q31(), arm_cfft_radix4_q31(), and arm_rfft_q31().
void arm_radix4_butterfly_inverse_q31 | ( | q31_t * | pSrc, |
uint32_t | fftLen, | ||
q31_t * | pCoef, | ||
uint32_t | twidCoefModifier | ||
) |
[in,out] | *pSrc | points to the in-place buffer of Q31 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. |
References __SIMD64.
Referenced by arm_cfft_radix4_q31(), and arm_rfft_q31().
void arm_radix4_butterfly_q31 | ( | q31_t * | pSrc, |
uint32_t | fftLen, | ||
q31_t * | pCoef, | ||
uint32_t | twidCoefModifier | ||
) |
end of ComplexFFT group
[in,out] | *pSrc | points to the in-place buffer of Q31 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. |
References __SIMD64.
Referenced by arm_cfft_radix4_q31(), and arm_rfft_q31().
void arm_split_rfft_q31 | ( | q31_t * | pSrc, |
uint32_t | fftLen, | ||
q31_t * | pATable, | ||
q31_t * | pBTable, | ||
q31_t * | pDst, | ||
uint32_t | modifier | ||
) |
end of RealFFT group
[in] | *pSrc | points to the input buffer. |
[in] | fftLen | length of FFT. |
[in] | *pATable | points to the twiddle Coef A buffer. |
[in] | *pBTable | points to the twiddle Coef B buffer. |
[out] | *pDst | points to the output buffer. |
[in] | modifier | twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. |
Referenced by arm_rfft_q31().
void arm_split_rifft_q31 | ( | q31_t * | pSrc, |
uint32_t | fftLen, | ||
q31_t * | pATable, | ||
q31_t * | pBTable, | ||
q31_t * | pDst, | ||
uint32_t | modifier | ||
) |
[in] | *pSrc | points to the input buffer. |
[in] | fftLen | length of FFT. |
[in] | *pATable | points to the twiddle Coef A buffer. |
[in] | *pBTable | points to the twiddle Coef B buffer. |
[out] | *pDst | points to the output buffer. |
[in] | modifier | twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. |
Referenced by arm_rfft_q31().