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46 lines
1.7 KiB
Markdown
46 lines
1.7 KiB
Markdown
# hdr-hlg-regression
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Regression test that locks down end-to-end **HDR HLG (BT.2020 ARIB STD-B67)**
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video rendering. Companion to `hdr-regression` (PQ), kept as a separate suite
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so the HLG-specific encoder/metadata path stays tested in isolation.
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## What it covers
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| Window | Time | Shape | Expected |
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| ------ | ------------ | ------------------------------------- | -------- |
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| A | 0.0 – 2.5 s | Baseline HLG video + DOM overlay | pass |
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| B | 2.5 – 5.0 s | Wrapper opacity fade around HLG video | pass |
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The test pins the contract that:
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- `extractMediaMetadata` reports `bt2020/arib-std-b67/limited` for the HLG
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source (i.e. HLG is detected and not silently coerced to PQ).
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- `isHdrColorSpace` flips the orchestrator into the layered HDR path on the
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HLG signal.
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- The HLG source is decoded into `rgb48le` and blitted under the SDR DOM
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overlay on every frame.
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- Wrapper-opacity composition (window B) does not break HLG pass-through.
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- `hdrEncoder` writes HEVC Main10 / `yuv420p10le` / BT.2020 HLG with the
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correct color tags (no PQ mastering display metadata for HLG).
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The suite is intentionally short (5 s, two windows) — it exists to detect
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regressions in the HLG-specific code path, not to enumerate every composition
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shape (those live in `hdr-regression`).
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## Fixture
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`src/hdr-hlg-clip.mp4` — last 5 seconds of a user-recorded HEVC HLG clip,
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remuxed (no re-encode) so the HLG color tags survive verbatim.
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## Running
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```bash
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cd packages/producer
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bun run test:regression hdr-hlg-regression
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bun run test:regression:update hdr-hlg-regression
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```
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In CI it runs in the `hdr` shard alongside `hdr-regression`
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(see `.github/workflows/regression.yml`).
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