Struct SystemInstant 

pub struct SystemInstant { /* private fields */ }

A monotonic Instant paired with the wall-clock time it was taken at.

Sans-I/O protocol code measures time with a monotonic Instant, but RTCP timestamps and NTP fields need wall-clock time. Capturing both once lets either be derived from the other later without re-reading the (non-monotonic) system clock.

Implementations

impl SystemInstant

pub fn now() -> Self

Captures the current monotonic instant together with the current wall-clock time.

pub fn instant(&self, duration_since_unix_epoch: Duration) -> Instant

Converts a Unix-epoch duration back into the monotonic Instant it corresponds to.

pub fn duration_since_unix_epoch(&self) -> Duration

The wall-clock time, as a duration since the Unix epoch, captured at construction.

pub fn unix(&self, now: Instant) -> Duration

Converts the monotonic now into wall-clock time as a duration since the Unix epoch.

pub fn ntp(&self, now: Instant) -> u64

Converts the monotonic now into a 64-bit NTP timestamp, as RTCP Sender Reports carry.

pub fn unix2ntp(duration_since_unix_epoch: Duration) -> u64

Converts a Unix-epoch duration into a 64-bit NTP timestamp.

The result is seconds since the NTP epoch (1900-01-01) in the high 32 bits and a binary fraction of a second in the low 32.

pub fn ntp2unix(ntp: u64) -> Duration

Converts a 64-bit NTP timestamp into a duration since the Unix epoch.

The inverse of Self::unix2ntp.

Trait Implementations

impl Clone for SystemInstant

fn clone(&self) -> SystemInstant

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SystemInstant

impl Debug for SystemInstant

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

Formats the value using the given formatter.

impl Eq for SystemInstant

impl Hash for SystemInstant

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

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 SystemInstant

fn cmp(&self, other: &SystemInstant) -> 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 SystemInstant

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for SystemInstant

fn partial_cmp(&self, other: &SystemInstant) -> 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 StructuralPartialEq for SystemInstant