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[idd] hdr: propagate per-frame HDR metadata

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Handle DEFAULT, NEW, and UNCHANGED IDDCX HDR10 metadata states and
publish valid mastering metadata through KVMFR. Preserve the metadata
across post-processing without reallocating resources for
metadata-only changes.
This commit is contained in:
Geoffrey McRae
2026-07-19 02:13:57 +10:00
parent 624fa9f8bc
commit 1f6dbb0dae
8 changed files with 139 additions and 38 deletions
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16
idd/LGIdd/effect/CHDR16to10Effect.cpp
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@@ -123,18 +123,10 @@ PostProcessStatus CHDR16to10Effect::SetFormat(
dst.hdr = true;
dst.hdrPQ = true;
// Explicitly propagate HDR static metadata so it survives post-processing.
// Do not rely on the caller's copy semantics in CPostProcessor::Configure().
// The shader rotates the gamut from BT.709 to BT.2020, so advertise BT.2020
// mastering primaries here rather than forwarding the source's BT.709 set
// (in 0.00002 units) - otherwise consumers see PQ/BT.2020 content tagged
// with BT.709 primaries.
dst.displayPrimary[0][0] = 35400; // Rx
dst.displayPrimary[0][1] = 14600; // Ry
dst.displayPrimary[1][0] = 8500; // Gx
dst.displayPrimary[1][1] = 39850; // Gy
dst.displayPrimary[2][0] = 6550; // Bx
dst.displayPrimary[2][1] = 2300; // By
// Gamut conversion changes the signal's container primaries to BT.2020, but
// does not change the mastering display chromaticities described by ST 2086.
dst.hdrMetadata = src.hdrMetadata;
memcpy(dst.displayPrimary, src.displayPrimary, sizeof(dst.displayPrimary));
memcpy(dst.whitePoint , src.whitePoint , sizeof(dst.whitePoint ));
dst.maxDisplayLuminance = src.maxDisplayLuminance;
dst.minDisplayLuminance = src.minDisplayLuminance;