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decklink start up to separate factory

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Aiden
2026-05-22 15:27:46 +10:00
parent 315cbda9d1
commit 64a6125c3f
14 changed files with 330 additions and 88 deletions
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src/README.md
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@@ -204,12 +204,16 @@ Currently consumed fields:
- `inputFrameRate`
- `outputVideoFormat`
- `outputFrameRate`
- `videoInputBackend`
- `videoOutputBackend`
- `autoReload`
- `maxTemporalHistoryFrames`
- `previewEnabled`
- `previewFps`
- `enableExternalKeying`
`videoInputBackend` and `videoOutputBackend` currently support `decklink` and `none`. Backend creation is routed through the app-side video backend factory, so new concrete backends can be added without making `main` or the render cadence path own their startup details.
When `previewEnabled` is true, the preview window runs on `PreviewWindowThread`. It paints BGRA8 system-memory frames with Win32/GDI after render readback has already completed, so it does not bind GL and does not consume frames from DeckLink output. `previewFps` controls the preview repaint cadence; the default is 60 fps and `config/runtime-host.json` tracks the shipped 59.94 output cadence.
The loaded config is treated as a read-only startup snapshot. Subsystems that need config should receive this snapshot or a narrowed config struct from app orchestration; they should not reload files independently.