CMSIS-DSP
Version 1.8.0
CMSIS DSP Software Library
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Functions | |
void | arm_radix4_butterfly_q15 (q15_t *pSrc, uint32_t fftLen, const q15_t *pCoef, uint32_t twidCoefModifier) |
Core function for the Q15 CFFT butterfly process. More... | |
void | arm_radix4_butterfly_inverse_q15 (q15_t *pSrc, uint32_t fftLen, const q15_t *pCoef, uint32_t twidCoefModifier) |
Core function for the Q15 CIFFT butterfly process. More... | |
void | arm_bitreversal_16 (uint16_t *pSrc, const uint16_t bitRevLen, const uint16_t *pBitRevTable) |
In-place 16 bit reversal function. More... | |
void | arm_cfft_radix4by2_q15 (q15_t *pSrc, uint32_t fftLen, const q15_t *pCoef) |
void | arm_cfft_radix4by2_inverse_q15 (q15_t *pSrc, uint32_t fftLen, const q15_t *pCoef) |
void | arm_cfft_q15 (const arm_cfft_instance_q15 *S, q15_t *p1, uint8_t ifftFlag, uint8_t bitReverseFlag) |
Processing function for Q15 complex FFT. More... | |
void arm_bitreversal_16 | ( | uint16_t * | pSrc, |
const uint16_t | bitRevLen, | ||
const uint16_t * | pBitRevTab | ||
) |
[in,out] | pSrc | points to in-place buffer of unknown 16-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_q15 | ( | q15_t * | pSrc16, |
uint32_t | fftLen, | ||
const 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. |
void arm_radix4_butterfly_q15 | ( | q15_t * | pSrc16, |
uint32_t | fftLen, | ||
const 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 |