CMSIS-DSP
Version 1.10.0
CMSIS DSP Software Library
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Functions | |
void | arm_radix4_butterfly_f32 (float32_t *pSrc, uint16_t fftLen, const float32_t *pCoef, uint16_t twidCoefModifier) |
void | arm_radix4_butterfly_inverse_f32 (float32_t *pSrc, uint16_t fftLen, const float32_t *pCoef, uint16_t twidCoefModifier, float32_t onebyfftLen) |
void | arm_bitreversal_f32 (float32_t *pSrc, uint16_t fftSize, uint16_t bitRevFactor, const uint16_t *pBitRevTab) |
In-place floating-point bit reversal function. More... | |
void | arm_split_rfft_f32 (float32_t *pSrc, uint32_t fftLen, const float32_t *pATable, const float32_t *pBTable, float32_t *pDst, uint32_t modifier) |
Core Real FFT process. More... | |
void | arm_split_rifft_f32 (float32_t *pSrc, uint32_t fftLen, const float32_t *pATable, const float32_t *pBTable, float32_t *pDst, uint32_t modifier) |
Core Real IFFT process. More... | |
void | arm_rfft_f32 (const arm_rfft_instance_f32 *S, float32_t *pSrc, float32_t *pDst) |
Processing function for the floating-point RFFT/RIFFT. Source buffer is modified by this function. More... | |
void arm_bitreversal_f32 | ( | float32_t * | pSrc, |
uint16_t | fftSize, | ||
uint16_t | bitRevFactor, | ||
const uint16_t * | pBitRevTab | ||
) |
[in,out] | pSrc | points to in-place floating-point data buffer |
[in] | fftSize | length of FFT |
[in] | bitRevFactor | bit reversal modifier that supports different size FFTs with the same bit reversal table |
[in] | pBitRevTab | points to bit reversal table |
void arm_radix4_butterfly_f32 | ( | float32_t * | pSrc, |
uint16_t | fftLen, | ||
const float32_t * | pCoef, | ||
uint16_t | twidCoefModifier | ||
) |
end of ComplexFFT group brief Core function for the floating-point CFFT butterfly process. param[in,out] pSrc points to the in-place buffer of floating-point data type param[in] fftLen length of the FFT param[in] pCoef points to the twiddle coefficient buffer param[in] twidCoefModifier twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table return none
void arm_radix4_butterfly_inverse_f32 | ( | float32_t * | pSrc, |
uint16_t | fftLen, | ||
const float32_t * | pCoef, | ||
uint16_t | twidCoefModifier, | ||
float32_t | onebyfftLen | ||
) |
brief Core function for the floating-point CIFFT butterfly process. param[in,out] pSrc points to the in-place buffer of floating-point data type param[in] fftLen length of the FFT param[in] pCoef points to twiddle coefficient buffer param[in] twidCoefModifier twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. param[in] onebyfftLen value of 1/fftLen return none
void arm_split_rfft_f32 | ( | float32_t * | pSrc, |
uint32_t | fftLen, | ||
const float32_t * | pATable, | ||
const float32_t * | pBTable, | ||
float32_t * | pDst, | ||
uint32_t | modifier | ||
) |
end of RealFFT group
[in] | pSrc | points to input buffer |
[in] | fftLen | length of FFT |
[in] | pATable | points to twiddle Coef A buffer |
[in] | pBTable | points to twiddle Coef B buffer |
[out] | pDst | points to output buffer |
[in] | modifier | twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table |
void arm_split_rifft_f32 | ( | float32_t * | pSrc, |
uint32_t | fftLen, | ||
const float32_t * | pATable, | ||
const float32_t * | pBTable, | ||
float32_t * | pDst, | ||
uint32_t | modifier | ||
) |
[in] | pSrc | points to input buffer |
[in] | fftLen | length of FFT |
[in] | pATable | points to twiddle Coef A buffer |
[in] | pBTable | points to twiddle Coef B buffer |
[out] | pDst | points to output buffer |
[in] | modifier | twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table |