[REQ] Lensfun (hw-accelerated ?) filter support

[MarcoRavich]

Hi there,
I recently discovered the cool Lensfun library and the relative FFMPEG filter.

HW-accelerated lens correction would be great.

EDIT: from this interesting - even if dated (2010) - paper on the subject
In macroscopic terms, we find that todays mainstream conventional multicores are not effective in supporting real-time distortion correction, at least not with the currently commercially available core counts [..]
At the same time, hardware accelerators - such as FPGAs, GPUs, or non-conventional multicore architectures such as the Cell BE - are often used to improve performance of computationally demanding algorithms or applications with execution time constraints.

[rigaya]

Unfortunately, Lensfun does not seems to provide GPU accelerated implementation, so it would be difficult to integrate it to QSVEnc.

I'm sorry but currently I have no plan to implement it to QSVEnc.