Codex
32e9d5c1aa
media: isolate HDR tone tables and preserve signalled peak
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Replace shared mutable HDR lookup tables with immutable defaults and stream-owned prepared PQ curves. Concurrent streams at different peaks no longer race. Preserve MaxCLL and mastering maximum through CPU MP4/WebM conversion using the same peak-selection rule as GPU import.
Validate independent HDR math, default table equivalence, concurrent ASan/UBSan/TSan, strict C89 stack limits, coded peak metadata and full player/AV1 suites. Thirty native D3D11/D3D12/Vulkan direct and threaded recovery cases cover 360 pictures (maximum RGB error 1) and 1559934 PCM frames (maximum S16 error 3) without timing alignment.
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