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LR-HDR-EXPORT: HDR AVIF (10-bit Rec. 2020 PQ)

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`encode_avif_pq`: linear Rec. 2020 with SDR white at 1.0 → PQ (SDR white at
203 cd/m², BT.2408), BT.2020 NCL YCbCr 4:4:4, 10-bit, with CICP nclx
(9/16/9, full range) and a clli box. ravif fixes the sRGB curve, so this
drives the rav1e + avif-serialize it already uses (no new crates).

Export: AVIF with `hdr` renders the HDR edit in Rec. 2020 and writes PQ.
Photos without an HDR edit export as before, in every format. CoreImage
decodes the file as HDR (same 3.1 % of the frame above SDR white as the gain
map JPEG of the same edit).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
akvaithi
2026-10-09 22:40:37 -05:00
co-authored by Claude Opus 5.5
parent af06f2dbc1
commit 7828f93c32
12 changed files with 203 additions and 23 deletions
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crates/codecs/src/lib.rs
+2 -1
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@@ -35,7 +35,8 @@ mod tiff_codec;
mod webp;
pub use encode::{
ChromaSubsampling, EncodeImage, EncodeMeta, Samples, TiffCompression, encode_avif, encode_jpeg, encode_png, encode_tiff, encode_webp_lossless,
ChromaSubsampling, EncodeImage, EncodeMeta, HDR_REFERENCE_WHITE_NITS, Samples, TiffCompression, encode_avif, encode_avif_pq, encode_jpeg,
encode_png, encode_tiff, encode_webp_lossless,
};
pub use sniff::{Format, sniff};
pub use space::{NamedSpace, SourceSpace, SpaceOrigin, Trc};