Functions | |
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. | |
arm_status | arm_rfft_init_f32 (arm_rfft_instance_f32 *S, arm_cfft_radix4_instance_f32 *S_CFFT, uint32_t fftLenReal, uint32_t ifftFlagR, uint32_t bitReverseFlag) |
Initialization function for the floating-point RFFT/RIFFT. | |
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.
[in] | S | points to an instance of the floating-point RFFT/RIFFT structure |
[in] | pSrc | points to the input buffer |
[out] | pDst | points to the output buffer |
arm_status arm_rfft_init_f32 | ( | arm_rfft_instance_f32 * | S, |
arm_cfft_radix4_instance_f32 * | S_CFFT, | ||
uint32_t | fftLenReal, | ||
uint32_t | ifftFlagR, | ||
uint32_t | bitReverseFlag | ||
) |
Initialization function for the floating-point RFFT/RIFFT.
[in,out] | S | points to an instance of the floating-point RFFT/RIFFT structure |
[in,out] | S_CFFT | points to an instance of the floating-point CFFT/CIFFT structure |
[in] | fftLenReal | length of the FFT. |
[in] | ifftFlagR | flag that selects transform direction
|
[in] | bitReverseFlag | flag that enables / disables bit reversal of output
|
fftLenReal
is not a supported lengthfftLenReal
specifies length of RFFT/RIFFT Process. Supported FFT Lengths are 128, 512, 2048. ifftFlagR
controls whether a forward or inverse transform is computed. Set(=1) ifftFlagR to calculate RIFFT, otherwise RFFT is calculated. bitReverseFlag
controls whether output is in normal order or bit reversed order. Set(=1) bitReverseFlag for output to be in normal order otherwise output is in bit reversed order.