[ROCM] Add rocjpeg support for GPU image decoding (RGB output)

[xytpai]

Add rocjpeg image decoding logic.

• Currently only support RGB output format due to its widespread use.

More formats and encoding paths will be supported in the future.

cc @jeffdaily @jithunnair-amd

[pytorch-bot]

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[xytpai]

@NicolasHug

[NicolasHug]

Hi @xytpai , thanks for the PR.
I don't think this is something we'll have the bandwidth to prioritize at this moment, although this might eventually become in scope for TorchCodec, e.g. via the "third-party TC extensions" that we plan to support (where decoder extensions could be added in third-parties repos, out of TC's core).

May I ask, is there already a Python library that exposes the Rocm jpeg decoder?

[xytpai]

Hi, @NicolasHug thanks for the feedback!

I understand that this may not be a priority at the moment. I'd like to ask if we could consider merging this in its current form to reach a functionally ready state. This would allow the ROCm JPEG decoding path to be available for users and contributors to build upon. We're happy to address any remaining review comments and ensure the code meets the project's quality standards. Please let us know if there's anything we can do to move this forward. Thanks!

May I ask, is there already a Python library that exposes the Rocm jpeg decoder?

Yes, there is already a Python library that exposes the ROCm JPEG decoder. https://github.com/ROCm/rocPyDecode