CMSIS-DSP
Version 1.10.0
CMSIS DSP Software Library
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Functions | |
void | arm_radix4_butterfly_q31 (q31_t *pSrc, uint32_t fftLen, const q31_t *pCoef, uint32_t twidCoefModifier) |
Core function for the Q31 CFFT butterfly process. More... | |
void | arm_radix4_butterfly_inverse_q31 (q31_t *pSrc, uint32_t fftLen, const q31_t *pCoef, uint32_t twidCoefModifier) |
Core function for the Q31 CIFFT butterfly process. More... | |
void | arm_bitreversal_32 (uint32_t *pSrc, const uint16_t bitRevLen, const uint16_t *pBitRevTable) |
In-place 32 bit reversal function. More... | |
void | arm_cfft_radix4by2_q31 (q31_t *pSrc, uint32_t fftLen, const q31_t *pCoef) |
void | arm_cfft_radix4by2_inverse_q31 (q31_t *pSrc, uint32_t fftLen, const q31_t *pCoef) |
void | arm_cfft_q31 (const arm_cfft_instance_q31 *S, q31_t *p1, uint8_t ifftFlag, uint8_t bitReverseFlag) |
Processing function for the Q31 complex FFT. More... | |
void arm_bitreversal_32 | ( | uint32_t * | pSrc, |
const uint16_t | bitRevLen, | ||
const uint16_t * | pBitRevTab | ||
) |
[in,out] | pSrc | points to in-place buffer of unknown 32-bit data type |
[in] | bitRevLen | bit reversal table length |
[in] | pBitRevTab | points to bit reversal table |
end of ComplexFFT group
void arm_radix4_butterfly_inverse_q31 | ( | q31_t * | pSrc, |
uint32_t | fftLen, | ||
const 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. |
void arm_radix4_butterfly_q31 | ( | q31_t * | pSrc, |
uint32_t | fftLen, | ||
const 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. |