Looking for a working example of FFT convolution with Intel IPP

Question

Just trying to wrap my head around IPP right now. Does anyone have any working C/C++ code for doing a FFT convolution on an image?

Answer 1

Example from here:

/* Sample C-code snipet for Example 1 using Intel® Integrated Performance Primitives (Intel® IPP): */

/* allocate and initialize specification structures */
ippsFFTInitAlloc_C_32fc(&FFTspec1_p, order, IPP_FFT_DIV_FWD_BY_N, ippAlgHintFast);
ippsFFTGetBufSize_C_32fc(FFTspec1, &BufSize);
Buf1_p = (Ipp8u *) ippsMalloc_32sc(BufSize*sizeof(Ipp8u));

// ...

/* compute in-place FFTs of input sequences*/
ippsFFTFwd_CToC_32fc_I(x_p, FFTspec1_p, Buf1_p);
ippsFFTFwd_CToC_32fc_I(y_p, FFTspec1_p, Buf1_p);

/* perform complex multiplication and inverse FFT*/
ippsMul_32fc( x_p, y_p, o_p, veclength);
ippsFFTInv_CToC_32fc_I(o_p,FFTspec1_p, Buf1_p);

// ...

/* free specification structures */
ippsFFTFree_C_32fc( FFTSpec1_p);
ippsFree(Buf1_p);