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Vance Ingalls
8ffd007716
## Summary Tighten `hdr-regression` Window F `maxFrameFailures` from 5 → 0 now that Chunk 4 (matrix3d support + scene initial-state) has landed. ## Why Window F (transform + scale + border-radius on the video itself) was the remaining known-fail in the `hdr-regression` suite, baked into the golden so the suite stayed green while Chunk 4 was outstanding. After Chunk 4 fixed `parseTransformMatrix` (matrix3d support) and the shader-transitions initial-state, re-running the suite shows **0 failed frames** against the existing golden — the encoder is byte-deterministic, and Window F's GSAP rotation/scale happens to emit 2D `matrix()` rather than `matrix3d()`, so the same golden is still correct after the fix. Tightening the budget catches any drift in the layered HDR compositor immediately. ## What changed - `tests/hdr-regression/meta.json`: `maxFrameFailures` 5 → 0 (matches `hdr-hlg-regression`). - `tests/hdr-regression/README.md`: Window F row + Fix history section updated to reflect the new state. ## Test plan - [x] `bun run test --filter hdr-regression` — passes with 0 failed frames at the new budget. ## Stack Follow-up to Chunk 4 (transform & clipping). Reviewable separately so the budget tightening is decoupled from the code fix.
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2.1 KiB
HDR Regression Suite
HDR10 (BT.2020 PQ) regression suite with four back-to-back windows (A–D) covering the highest-value HDR compositing shapes. 10s / 300 frames at 30fps.
Windows
| # | Window | Pipeline aspect under test |
|---|---|---|
| A | Baseline HDR + direct opacity | HDR pass-through with a GSAP opacity tween directly on the <video> element. |
| B | Z-order sandwich (DOM → HDR → DOM) | Orange background, HDR video in the middle, blue overlay on top. Tests z-ordered layer compositing. |
| C | Transform + border-radius | HDR <video> with transform: rotate() scale() + border-radius clipping. Tests affine blit pipeline. |
| D | Shader transition (HDR → HDR image) | Shader transition between an HDR video and an HDR PQ image. Tests HDR image transfer cache + shader path. |
Fixtures
src/hdr-clip.mp4— short HEVC Main10 / BT.2020 PQ clip with a moving bright gradient (seeNOTICE.mdfor attribution). Reused across windows A–G and as scene A of the window-H shader transition.src/hdr-photo-pq.png— 256×144 16-bit RGB PNG with a hand-injectedcICPchunk (primaries=BT.2020, transfer=SMPTE ST 2084, matrix=GBR, range=full). Used as scene B of the window-H shader transition.
ffmpeg is not used to generate the PNG because it does not embed cICP
in PNGs — without that chunk Chromium would not treat the file as HDR and the
test would silently fall back to SDR.
To regenerate the PNG fixture (deterministic, byte-for-byte stable):
python3 packages/producer/tests/hdr-regression/scripts/generate-hdr-photo-pq.py
Running
cd packages/producer
bun run test hdr-regression
bun run test:update hdr-regression
In CI it runs in the hdr shard alongside hdr-hlg-regression
(see .github/workflows/regression.yml).