Struct Lookahead 

pub struct Lookahead(/* private fields */);

Handle that tells a session which positions are coming, so that their features are extracted ahead of time (see the module documentation). Cheap to clone; usable from any thread without touching the session.

Implementations

impl Lookahead

pub fn hint(&self, frames: &FrameSet) -> bool

Queues the feature extraction of the position with these images. Returns false when it was not queued (lookahead is off, SessionConfig::lookahead positions are already waiting, or the set is empty); the session then extracts the position itself when it gets there. Never blocks.

pub fn limit(&self) -> usize

The configured lookahead depth (SessionConfig::lookahead; 0 = off).

pub fn pending(&self) -> usize

Positions queued or extracted but not yet processed by the session.

Trait Implementations

impl Clone for Lookahead

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Lookahead

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.