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fix(video): honor the signaled CSC matrix end-to-end + tvOS HDR presentation

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Clients derive Y'CbCr->RGB from the stream's SIGNALED matrix x range x depth
via shared csc rows (Rust csc_rows + Swift CscRows) instead of hardcoded
709/2020 - a BT.601-signaled stream (a Linux host's RGB-input NVENC) no longer
renders with a constant hue error. Host-side signaling made honest across
NVENC/VAAPI/openh264/GameStream and the session plan's chroma/bit-depth.
Decoded color-bar fixtures (601/709 x limited/full) pin the math in tests on
both cores.

Same presenter, tvOS HDR: tvOS has no Metal EDR API and a bare PQ colorspace
tag composites UNTONE-MAPPED (the "overblown" Apple TV report), so HDR now
splits on the display's live EDR headroom - PQ passthrough when the
per-session AVDisplayManager mode switch landed (a real HDR10 output
tone-maps itself), else an in-shader PQ->SDR tone-map (203-nit reference
white, extended-Reinhard 1000-nit knee, 2020->709) into the proven SDR layer
config. The 10-bit stream keeps its full decode depth either way.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-07-10 16:58:11 +02:00
parent db49904c6d
commit 1fcf9e11ec
26 changed files with 2268 additions and 409 deletions
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crates/punktfunk-host/src/gamestream/mod.rs
+2 -2
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@@ -53,8 +53,8 @@ pub const SCM_AV1_MAIN10: u32 = 0x0002_0000;
/// host can actually deliver it ([`host_hdr_capable`]); it is never a static claim, because a non-HDR
/// host (Linux, or a Windows host without the `PUNKTFUNK_10BIT` opt-in) must not invite a client into
/// an HDR mode it can't produce. (The previous placeholder 3843 = 0xF03 wrongly claimed HEVC Main10 +
/// 4:4:4 and *no* AV1.) 4:4:4 stays off entirely: stock Moonlight is 4:2:0 and the Windows IDD-push
/// capturer can't yet deliver full-chroma frames (`crate::capture::capturer_supports_444`).
/// 4:4:4 and *no* AV1.) 4:4:4 stays off entirely on GameStream: stock Moonlight is 4:2:0 —
/// full-chroma is a punktfunk/1-native negotiation only (`crate::capture::capturer_supports_444`).
pub const SERVER_CODEC_MODE_SUPPORT: u32 = SCM_H264 | SCM_HEVC | SCM_AV1_MAIN8;
/// Whether this host can deliver an **HDR** (HEVC Main10 / BT.2020 PQ) GameStream — the single gate