Enable GPU support

[mreilaender]

Enables GPU support by adding --cuda to the argument parser and passing it to piper

Closes #1

[edurenye]

Looks good to me, and this would be a great thing to have.
Can you please review it @synesthesiam ?

[synesthesiam]

The piper executable does not support the --cuda flag

[edurenye]

Hi @synesthesiam, thank you for your quick answer.

According to the documentation from here: https://github.com/rhasspy/piper (line https://github.com/rhasspy/piper/blob/6c5e283439f8400aa7a2652aafbedfb77ca3fc22/README.md?plain=1#L176) piper has a --cuda flag.

Is it a bug there that cuda does not work (I see you just commited something in that repo related to cuda) or is it in this other issue rhasspy/rhasspy3#49?

Can we help you in some way?

[synesthesiam]

The Python library for piper supports CUDA. I added the flag for the C++ version yesterday, but it needs the "gpu" version of the onnx runtime so I will need to adjust the build process too.

[ashald]

@synesthesiam is there a way to leverage the latest C++ version that has the --cuda parameter? Thanks!

[ms1design]

+1, @synesthesiam I would be appreciated if you could guide us a bit how to utilise cuda in our Jetson project here (using cuda12.2 and onnxruntime-gpu): dusty-nv/jetson-containers#481

Edit: Solved here: dusty-nv/jetson-containers@4ba5dc4