Enum FpsTimestampSource 

pub enum FpsTimestampSource {
    Trigger,
    Hardware,
    HostClock,
}

Which timestamp source is used to estimate the frame rate.

Variants

Trigger

A trigger-derived timestamp (external trigger box, PTP sync, or the device clock mapped through a clock model). Most preferred: it reflects the true acquisition time and is available whenever a trigger is configured — including for cameras that expose no usable raw hardware timestamp — so it is usable in more cases than the device timestamp.

Hardware

The camera’s hardware/device timestamp. Used when no trigger is in use. It reflects the true acquisition time and is immune to host-side buffering, so the estimate is correct even when frames are delivered to the host in bursts.

HostClock

The host clock sampled when the frame was grabbed. Last-resort fallback used when neither a trigger timestamp nor a camera hardware timestamp is available. Under load the driver buffers frames and the host grabs them in bursts, so this can read several times too high.

Trait Implementations

impl Clone for FpsTimestampSource

fn clone(&self) -> FpsTimestampSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FpsTimestampSource

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

Formats the value using the given formatter.

impl PartialEq for FpsTimestampSource

fn eq(&self, other: &FpsTimestampSource) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for FpsTimestampSource

impl Eq for FpsTimestampSource

impl StructuralPartialEq for FpsTimestampSource