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UYVY backend
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Aiden
2026-05-30 19:16:16 +10:00
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docs/CURRENT_SYSTEM_ARCHITECTURE.md
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@@ -137,11 +137,11 @@ Video input and output are optional edges. `input.backend` and `output.backend`
The input edge writes CPU frames into `InputFrameMailbox`. The current DeckLink backend captures BGRA8 directly where possible, or raw UYVY8 for render-thread GPU decode. The input edge does not call GL, render, preview, screenshot, shader, or output scheduling code.
The output edge consumes completed system-memory frames from `SystemFrameExchange`. The current DeckLink backend schedules those frames to DeckLink. If video output is unavailable, the app continues running render cadence, control, preview, telemetry, and logging.
The output edge consumes completed system-memory frames from `SystemFrameExchange`. The render thread owns output pixel packing before readback: BGRA8 is read directly, and UYVY8 is packed on the GPU into a half-width RGBA8 target before async PBO readback. DeckLink and NDI output then schedule/send those completed CPU frames without invoking GL or converting pixels. If video output is unavailable, the app continues running render cadence, control, preview, telemetry, and logging.
Runtime state exposes backend-neutral output telemetry through `videoOutput`. Portable fields such as `enabled`, `backend`, and `scheduleFailures` stay at that level; backend-specific counters live under `videoOutput.backendMetrics`.
`PreviewWindowThread` is optional and uses a non-consuming system-memory tap. It paints with Win32/GDI on its own thread and skips preview ticks instead of blocking the frame exchange.
`PreviewWindowThread` is optional and uses a non-consuming system-memory tap. It paints BGRA8 directly, decodes UYVY8 only for preview presentation, and skips preview ticks instead of blocking the frame exchange.
Screenshot routes are present in the UI/OpenAPI surface but are not implemented in the current native command path yet.