[PNG] Meeting topics

Hello everyone,
We have a meeting this coming Monday. Here are some topics we can discuss.
Feel free to reply with any topics you would like to add/alter.

   - Discussion topics
      - C2PA
      <https://spec.c2pa.org/specifications/specifications/2.2/specs/C2PA_Specification.html#_embedding_manifests_into_png>
(provenance
      and authenticity)
         - Last time, we asked how widely used it is. It sounds like
         billions of PNGs have been produced with the 'caBX' chunk,
since AI systems
         include it when producing images.
         - Given this many images with 'caBX', perhaps we don't need to
         rename the chunk to 'cABX' when adding it to the spec.
      - SMPTE ST 2094-10 <https://github.com/w3c/png/issues/311> (tone
      mapping metadata)
         - We're waiting for more information. As such, this might be more
         of a status update report here than a discussion topic.
      - SMPTE 2094-50 <https://github.com/SMPTE/st2094-50> (gain curves)
         - A draft was just made public 3 days ago (follow link above).
         - Should we add a chunk for this?
         - T.35 <https://www.itu.int/rec/T-REC-T.35-200002-I> is related.
      - ISO 21496-1 <https://www.iso.org/standard/86775.html> (gain maps)
         - Any update on ISO possibly making this freely available?
         - Last meeting, we learned that W3C strongly prefers referencing
         freely available specs but makes exceptions. And that ISO is
unlikely to
         make specs free (although, I recall we managed this in the past?).
         - If it seems unlikely for the spec to become freely available,
         should we continue with some new chunks?
      - Updates
      - Apple will help with the iDOT extension.
      - FileReadSpeedTest <https://github.com/ProgramMax/FileReadSpeedTest>
      tool created to help identify & test decoding performance goals.