Question

I have an image stored in a pointer to char and I want to use on it ipp functions.
How do I build an Ipp8u* image in ipp from this pointer to char?
is this a heavy calculation (the construction)?
Can I do simple casting?
Thanks a lot

Answer 1

Yes, all you need to do is cast the pointer:

Ipp8u *ipp_data = static_cast<Ipp8u*>(your_data);

or, if you prefer C-style casts for some reason:

Ipp8u *ipp_data = (Ipp8u *)your_data;

As noted in the Intel documentation, Ipp8u is equivalent to C’s unsigned char — at least in the typical implementation where CHAR_BIT == 8. This isn’t required but I believe is the case for most (if not all) compilers/platforms supported by Intel-IPP.