Computes the forward fast Fourier transform (FFT) of a real signal.
IppStatus ippsFFTFwd_RToPerm_GSMAMR_16s_I (Ipp16s* pSrcDst);
pSrcDst |
Pointer to the input and output vector[128]. |
The function ippsFFTFwd_RToPerm_GSMAMR is declared in ippsc.h file. This function computes the forward FFT of a real signal. This transform is the same as done by the general signal processing FFT function ippsFFTFwd_RToPerm_16s_Sfs with the following settings: order = 7, flag = IPP_FFT_DIV_FWD_BY_N, scaleFactor = -1. The result of function operation may be different because the rounding mode used in ippsFFTFwd_RToPerm_16s_Sfs does not guarantee a bit-exact operation of GSM AMR codec (see Fourier Transform Functions).
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when the pSrcDst pointer is NULL. |
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