SPEC registers the residual refinement capabilities wai.image.int_refine,
wai.video.int_refine, wai.audio.int_refine and wai.splat.int_refine, each
refinement-only: applied in a declared order to the output of the stage
below it, bound to that output's producer by content hash, and never decoded
on its own. Section 4 never takes step 3 or 5 with one; section 8 adds the
role and lists the envelopes its registration makes non-conforming.
SPEC section 5's Base admission table holds the bases of every capability
applied to a base's output, the refinements and the LCEVC enhancement layer.
codecs::BASE_ADMISSION is that table; enhancement_bases, companion_applies_to
and admits read it, and no other admission logic remains.
The registry gains the refinement kind and role. A refinement is not
dispatchable, never selected, never a companion or a companion's base, and
not in the video media class; its class is StandardDefined and, like the
audio scene, it composes another envelope's decoded output, so it is as
exact as the base it refines. The registry export is regenerated.
A WAI1 manifest gains the optional member refines, kept as JSON so a
malformed value still parses; container::Refines reads it and reports
refines-malformed. Wai::check_component_roles reports a refinement without
refines, with a fallback, as a fallback, and refines on any other capability.
The emit paths parse a refinement's WIR1 payload.
extensions/staged-delivery.md defines stage sets, the refines member, the
per-unit application algorithm with its closed list of reasons, holds and
batches, tiers and stage hashes, the residual form, deferral, live deadlines,
attestation, byte counting, and the WIR1 payload with its check order, caps,
declared cost and refusal codes.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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