feat: parse clli and mdcv HDR metadata boxes - #2
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Parse Content Light Level Information (clli) and Mastering Display Colour Volume (mdcv) property boxes from the AVIF container. These ISOBMFF § 12.1.5 properties are essential for HDR content. Parsed values are exposed on AvifData as content_light_level and mastering_display fields. Tests use pre-generated fixture files (267-300 bytes each).
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Summary
clli) and Mastering Display Colour Volume (mdcv) property boxes from the AVIF containerAvifDataascontent_light_level: Option<ContentLightLevel>andmastering_display: Option<MasteringDisplayColourVolume>Details
cllicarries MaxCLL and MaxFALL (4 bytes, per CEA-861.3).mdcvcarries mastering display primaries, white point, and luminance range (24 bytes, per SMPTE ST 2086). Neither is a FullBox — no version/flags.New public types:
ContentLightLevelandMasteringDisplayColourVolume, bothCopy + Debug + Clone + PartialEq + Eq.This is the parser counterpart to kornelski/avif-serialize#17 which adds serialization support for the same boxes. The roundtrip tests use the avif-serialize fork as a dev-dependency; this can be switched to a crates.io version once #17 is merged and released.
Test plan
av1-avif/testFilesfixture dir)cargo clippyclean