Applying shader to multiple input pads

[Mathieu Duponchelle]

GstAggregator would seem like the appropriate base class.

On Fri, 2022-11-11 at 14:48 +0100, Jonas Danielsson via gstreamer-devel
wrote:
> Hello!
> 
> We are working on a project where we want to take two video frames
> (GLMemory)
> from two input pads and perform an operation on GPU using a shader
> with both
> frames as input. The output from this should be a single video frame
> in
> GLMemory.
> 
> And we want to do it in Rust. We are a bit stumped on what the best
> approach
> is for this and was wondering if someone could help us out a bit.
> 
> If we were to implement this as a element in Rust, then what should
> we use as
> a base class? And what help could we expect to get from it? We
> managed to
> perform transformations on a singla pad input using GstGLFilter as a
> parent
> but we are not sure what to use when we want to work on two GLMemory
> inputs.
> 
> In general do if you have examples of working with multiple input
> pads in Rust
> we are interested! :)
> 
> All help and documentation tips appreciated!
> 
> Jonas Danielsson