IPP DFT Real-to-Complex in-place

[Sönke_P_1]

What happened to the in-place functions of the real-to-complex DFTs in IPPS?

The documentations mentions additional functions with only one argument (pSrcDst) for in-place calculation. However, the header provides such in-place functions only for FFT and not for DFT transformations.

Calling ippsDFTFwd_RToCCS_32f(in, out, spec, buf) with in==out results in an error: ippStsContextMatchErr  Invalid context structure.

Any thoughts? Thanks!

[Ying_H_Intel]

Hi Sonke, 

I guess, you are looking for IPP 9.0 (or from IPS 2016 ) documentation, right?  Are you working windows or linux?

Regarding in-place functions, we had planed to deprecate all of them in early version as in most of case, the in=out can solve the problem. But later we restore some of them as requested and widely used, like ippsFFT. 

Do you have a small test case, so I can debug right away?

Best Regards,

Ying

ippStsContextMatchErr

Indicates an error when the specification identifier pFFTSpec is incorrect.