feat(jpeg): Support reading Ultra HDR images

[mugulmd]

Description

Initial feature request: #4424

Add support in the jpeg plugin for reading Ultra HDR images using the reference codec libultrahdr: https://github.com/google/libultrahdr

Tests

Images used for testing during development: https://github.com/MishaalRahmanGH/Ultra_HDR_Samples

Checklist:

• I have read the contribution guidelines.
• I have updated the documentation, if applicable. (Check if there is no
  need to update the documentation, for example if this is a bug fix that
  doesn't change the API.)
• I have ensured that the change is tested somewhere in the testsuite
  (adding new test cases if necessary).
• If I added or modified a C++ API call, I have also amended the
  corresponding Python bindings (and if altering ImageBufAlgo functions, also
  exposed the new functionality as oiiotool options).
• My code follows the prevailing code style of this project. If I haven't
  already run clang-format before submitting, I definitely will look at the CI
  test that runs clang-format and fix anything that it highlights as being
  nonconforming.

[linux-foundation-easycla]

• ❌ - login: @mugulmd / name: Loïc Vital . The commit (bae85af, f6b27d5, 16dc401, e28e535, 361830d, 226b800, c17521b, 278f1e5, 05776cc, abb0251, a01fafe, 1a2773e, 10ed1ab, bfe7040) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

[mugulmd]

@lgritz quick question: I will need to add at least one Ultra HDR image for the test suite. The ones I use for testing locally weigh a bit more than 2M. Should I add them directly to the OpenImageIO repo, or should I create a PR in OpenImageIO-images to add them there ?

[lgritz]

Images repo, please

[lgritz]

What's happening with icc is that the libuhdr's build is passing parameters to the compiler that it doesn't recognize. Its build system probably assumes that if it's building on Linux, it must be either gcc or clang. But icc doesn't take those particular arguments.

I think the easiest thing is to just set the icc test (in ci.yml) to disable the use of libuhdr by adding to its setenvs: the extra definition DISABLE_libuhdr=1. The icc compiler is basically discontinued, so it's really not important to test that particular case with libuhdr support. It's not worth the trouble to try to fix it for an optional dependency.

[mugulmd]

Once I get the CLA authorized by my company I'll be able to merge the PR containing the test image and then I'll re-introduce the test case in the test suite :)

[lgritz]

LGTM, thanks!

We'll leave this pending the CLA and adding a proper test including source in OpenImageIO-images. When those items are completed, I think it's ready to merge.