Struct Timestamp 

pub struct Timestamp { /* private fields */ }

A presentation timestamp, expressed as a PTS value in units of an associated Timebase.

Equality and ordering

Comparison is value-based (same instant compares equal even across different timebases): Timestamp(1000, 1/1000) equals Timestamp(90_000, 1/90_000). Hash hashes the reduced-form rational instant (pts · num, den), so equal timestamps hash the same.

Cross-timebase comparisons use 128-bit cross-multiplication — no division, no rounding error. Same-timebase comparisons take a fast path on pts.

Implementations

impl Timestamp

pub const fn new(pts: i64, timebase: Timebase) -> Timestamp

Creates a new Timestamp with the given PTS and timebase.

pub const fn pts(&self) -> i64

Returns the presentation timestamp, in units of Self::timebase.

To obtain a Duration, use Self::duration_since against a reference timestamp, or rescale via Self::rescale_to.

pub const fn timebase(&self) -> Timebase

Returns the timebase of the timestamp.

pub const fn with_pts(self, pts: i64) -> Timestamp

Set the value of the presentation timestamp.

pub const fn set_pts(&mut self, pts: i64) -> &mut Timestamp

Set the value of the presentation timestamp in place.

pub const fn rescale_to(self, target: Timebase) -> Timestamp

Returns a new Timestamp representing the same instant in a different timebase.

Rounds toward zero via Timebase::rescale_pts; round-tripping through a coarser timebase can lose precision.

pub const fn saturating_sub_duration(self, d: Duration) -> Timestamp

Returns a new Timestamp representing this instant shifted backward by d, in the same timebase. Saturates at i64::MIN if the subtraction would underflow (pathological for real video).

Useful for “virtual past” seeding: e.g., initializing a warmup-filter state to ts - min_duration so the first detected cut can fire immediately.

pub const fn cmp_semantic(&self, other: &Timestamp) -> Ordering

const fn form of Ord::cmp. Compares two timestamps by the instant they represent, rescaling if timebases differ.

Uses a 128-bit cross-multiply for the mixed-timebase case; no division, so no rounding error. Same-timebase comparisons take a direct fast path.

pub const fn duration_since(&self, earlier: &Timestamp) -> Option<Duration>

Returns the elapsed Duration from earlier to self, or None if earlier is after self.

Works across different timebases. Computes the exact rational difference first using a common denominator, then truncates once when converting to nanoseconds for the returned Duration. If the result would exceed Duration::MAX (pathological: seconds don’t fit in u64), saturates to Duration::MAX rather than wrapping.

Trait Implementations

impl Clone for Timestamp

fn clone(&self) -> Timestamp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Timestamp

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

Formats the value using the given formatter.

impl Hash for Timestamp

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Timestamp

fn cmp(&self, other: &Timestamp) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Timestamp

fn eq(&self, other: &Timestamp) -> 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 PartialOrd for Timestamp

fn partial_cmp(&self, other: &Timestamp) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Timestamp

impl Eq for Timestamp