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CMSIS-DSP
Verison 1.4.1
CMSIS DSP Software Library
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Functions | |
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. More... | |
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. More... | |
void | arm_bitreversal_q15 (q15_t *pSrc, uint32_t fftLen, uint16_t bitRevFactor, uint16_t *pBitRevTab) |
void | arm_split_rfft_q15 (q15_t *pSrc, uint32_t fftLen, q15_t *pATable, q15_t *pBTable, q15_t *pDst, uint32_t modifier) |
Core Real FFT process. More... | |
void | arm_split_rifft_q15 (q15_t *pSrc, uint32_t fftLen, q15_t *pATable, q15_t *pBTable, q15_t *pDst, uint32_t modifier) |
Core Real IFFT process. More... | |
void | arm_rfft_q15 (const arm_rfft_instance_q15 *S, q15_t *pSrc, q15_t *pDst) |
Processing function for the Q15 RFFT/RIFFT. More... | |
void arm_bitreversal_q15 | ( | q15_t * | pSrc, |
uint32_t | fftLen, | ||
uint16_t | bitRevFactor, | ||
uint16_t * | pBitRevTab | ||
) |
Referenced by arm_cfft_radix2_q15(), arm_cfft_radix4_q15(), and arm_rfft_q15().
void arm_radix4_butterfly_inverse_q15 | ( | q15_t * | pSrc16, |
uint32_t | fftLen, | ||
q15_t * | pCoef16, | ||
uint32_t | twidCoefModifier | ||
) |
[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. |
References __SIMD32, and _SIMD32_OFFSET.
Referenced by arm_cfft_radix4_q15(), and arm_rfft_q15().
void arm_radix4_butterfly_q15 | ( | q15_t * | pSrc16, |
uint32_t | fftLen, | ||
q15_t * | pCoef16, | ||
uint32_t | twidCoefModifier | ||
) |
end of ComplexFFT group
[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. |
References __SIMD32, and _SIMD32_OFFSET.
Referenced by arm_cfft_radix4_q15(), and arm_rfft_q15().
void arm_split_rfft_q15 | ( | q15_t * | pSrc, |
uint32_t | fftLen, | ||
q15_t * | pATable, | ||
q15_t * | pBTable, | ||
q15_t * | pDst, | ||
uint32_t | modifier | ||
) |
end of RealFFT group
*pSrc | points to the input buffer. |
fftLen | length of FFT. |
*pATable | points to the A twiddle Coef buffer. |
*pBTable | points to the B twiddle Coef buffer. |
*pDst | points to the output buffer. |
modifier | twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. |
References __SIMD32.
Referenced by arm_rfft_q15().
void arm_split_rifft_q15 | ( | q15_t * | pSrc, |
uint32_t | fftLen, | ||
q15_t * | pATable, | ||
q15_t * | pBTable, | ||
q15_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. |
References __SIMD32.
Referenced by arm_rfft_q15().