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Vance Ingalls
d7c1050e44
## Summary Replace the trivial `hdr-pq` and `hdr-image-only` tests with two consolidated, time-windowed regression suites that exercise the full HDR pipeline. These goldens are the safety net for every other PR in this stack. ## Why The pre-existing HDR tests covered only a single full-bleed video or image with a static text label — none of the features that the HDR pipeline has to handle differently from SDR (opacity animation, z-ordered multi-layer compositing, transforms, border-radius clipping, shader transitions, multiple HDR sources, object-fit modes, mixed HDR+SDR layering, HLG transfer). This PR builds the missing safety net first so every subsequent fix can be proven correct. ## What changed - New `packages/producer/tests/hdr-regression/` (PQ, BT.2020, ~20 s, 1080p, 8 windows A–H): - A: static baseline (HDR video + DOM overlay) - B: wrapper-opacity fade - C: direct-on-`<video>` opacity tween (documents the Chunk 1 bug) - D: z-order sandwich (DOM → HDR → DOM) - E: two HDR videos side-by-side (pins PR #289) - F: rotation + scale + border-radius (documents the Chunk 4 bug) - G: `object-fit: contain` - H: shader crossfade between HDR video and HDR image - New `packages/producer/tests/hdr-hlg-regression/` (HLG, ARIB STD-B67, ~5 s, 2 windows A–B) — exercises the separate HLG LUT/OETF code path that previously had **zero** coverage. - New `scripts/generate-hdr-photo-pq.py` synthesizes `hdr-photo-pq.png` with a cICP chunk for BT.2020/PQ/full. - Removed `tests/hdr-pq/` and `tests/hdr-image-only/`. - Updated `.github/workflows/regression.yml` HDR shard to run the new pair sequentially. - All compositions follow the documented timed-element pattern (`data-start`, `data-duration`, `class="clip"` directly on each timed leaf — no wrapper inheritance). ## Test plan - [x] Goldens generated with `bun run test:update --sequential`. - [x] `ffprobe` confirms HEVC/yuv420p10le/bt2020nc/smpte2084 (PQ) and arib-std-b67 (HLG). - [x] Suite green with `maxFrameFailures` budgets that absorb the documented Chunk 1 / Chunk 4 known-fails — tightened in follow-up PRs in this stack. ## Stack Foundational PR for the HDR follow-ups stack (Chunk 0 of `plans/hdr-followups.md`). Every subsequent PR builds on this safety net.
53 lines
2.0 KiB
Markdown
53 lines
2.0 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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- `extractVideoMetadata` 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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## Tolerance
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`maxFrameFailures` is **0** here. HLG is a pure pass-through path — no known
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failures, no transcoder workarounds — and HEVC encoding against the rendered
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`rgb48le` buffer is byte-deterministic on the same fixture. Any drift is a
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real regression, not codec noise, so the budget is the strictest possible.
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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 hdr-hlg-regression
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bun run test: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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