Struct CMTime 

#[repr(C)]
pub struct CMTime {
    pub value: i64,
    pub timescale: i32,
    pub flags: u32,
    pub epoch: i64,
}

Available on crate feature cm only.

CMTime representation matching Core Media’s CMTime

Represents a rational time value with a 64-bit numerator and 32-bit denominator.

Examples

use apple_cf::cm::CMTime;

// Create a time of 1 second (30/30)
let time = CMTime::new(30, 30);
assert_eq!(time.as_seconds(), Some(1.0));

// Create a time of 2.5 seconds at 1000 Hz timescale
let time = CMTime::new(2500, 1000);
assert_eq!(time.value, 2500);
assert_eq!(time.timescale, 1000);
assert_eq!(time.as_seconds(), Some(2.5));

Fields

value: i64

timescale: i32

flags: u32

epoch: i64

Implementations

impl CMTime

pub const ZERO: Self

Core Media’s zero time value (kCMTimeZero).

pub const INVALID: Self

Core Media’s invalid time sentinel (kCMTimeInvalid).

pub const fn new(value: i64, timescale: i32) -> Self

Creates a valid CMTime with the supplied value and timescale.

pub const fn is_valid(&self) -> bool

Returns whether this time carries Core Media’s valid flag.

pub const fn is_zero(&self) -> bool

Check if this time represents zero

pub const fn is_indefinite(&self) -> bool

Check if this time is indefinite

pub const fn is_positive_infinity(&self) -> bool

Check if this time is positive infinity

pub const fn is_negative_infinity(&self) -> bool

Check if this time is negative infinity

pub const fn has_been_rounded(&self) -> bool

Check if this time has been rounded

pub const fn equals(&self, other: &Self) -> bool

Compare two times for equality (value and timescale)

pub const fn positive_infinity() -> Self

Create a time representing positive infinity

pub const fn negative_infinity() -> Self

Create a time representing negative infinity

pub const fn indefinite() -> Self

Create an indefinite time

pub fn as_seconds(&self) -> Option<f64>

Converts this time to seconds when it is valid and has a non-zero timescale.

pub fn from_seconds(seconds: f64, preferred_timescale: i32) -> Self

Construct a CMTime from a floating-point number of seconds with the requested preferred_timescale (typically 600 for video, 48000 / 44100 for audio). Wraps CMTimeMakeWithSeconds.

pub fn add(self, other: Self) -> Self

Add two times. Wraps CMTimeAdd. Returns CMTime::INVALID if either operand is invalid.

pub fn subtract(self, other: Self) -> Self

Subtract other from self. Wraps CMTimeSubtract.

pub fn multiply(self, multiplier: i32) -> Self

Multiply by an integer. Wraps CMTimeMultiply.

pub fn multiply_by_f64(self, factor: f64) -> Self

Multiply by an f64 factor. Wraps CMTimeMultiplyByFloat64.

pub fn compare(self, other: Self) -> Ordering

Compare two times. Returns Ordering::Less if self < other, Greater if self > other, Equal otherwise. Wraps CMTimeCompare.

pub fn convert_scale(self, new_timescale: i32) -> Self

Convert this time to a different new_timescale, applying Apple’s default rounding (kCMTimeRoundingMethod_Default). Wraps CMTimeConvertScale.

Trait Implementations

impl Clone for CMTime

fn clone(&self) -> CMTime

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CMTime

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

Formats the value using the given formatter.

impl Default for CMTime

fn default() -> Self

Returns the “default value” for a type.

impl Display for CMTime

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

Formats the value using the given formatter.

impl Hash for CMTime

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 PartialEq for CMTime

fn eq(&self, other: &CMTime) -> 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 CMTime

impl Eq for CMTime

impl StructuralPartialEq for CMTime