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preview_diagnostics

screen_app::commands

Function preview_diagnostics 

Source 
pub fn preview_diagnostics(
    state: State<'_, PreviewDiagnostics>,
) -> DiagnosticsSnapshot
Expand description

Snapshot the camera-pipeline diagnostics (M-CAM.3 / AUT-257 diagnostic addition).

Returns total frames received, source dims, source fps × 100, and the absolute path of the first-frame PNG dump (if one was written this session). Leptos polls this every 500ms while the Recorder surface is open to render a small overlay showing the pipeline is alive — see the <CameraDiagnostics /> component in crates/app-ui/src/camera_diagnostics.rs.

Wait-free on the hot path (atomic loads only, no mutex on the counters); the dump-path read takes a Mutex<Option<PathBuf>> briefly but only when the snapshot is requested.