Struct StageContext 

pub struct StageContext<'a> {
    pub feed_id: FeedId,
    pub frame: &'a FrameEnvelope,
    pub artifacts: &'a PerceptionArtifacts,
    pub view: &'a ViewSnapshot,
    pub temporal: &'a dyn TemporalAccess,
    pub metrics: &'a StageMetrics,
}

Context provided to every stage invocation.

Contains the current frame, accumulated artifacts from prior stages, read-only view and temporal snapshots, and stage-level metrics.

All references are valid for the duration of the process() call.

Fields

feed_id: FeedId

The feed this frame belongs to.

frame: &'a FrameEnvelope

The current video frame.

artifacts: &'a PerceptionArtifacts

Accumulated outputs of all prior stages for this frame.

view: &'a ViewSnapshot

View-state snapshot for this frame.

temporal: &'a dyn TemporalAccess

Read-only temporal state snapshot.

Provides typed access to track histories, observation windows, and view-epoch context. Implemented by nv_temporal::TemporalStoreSnapshot.

metrics: &'a StageMetrics

Performance metrics for this stage.