openh264/
time.rs

1use std::ffi::c_longlong;
2use std::ops::{Add, Sub};
3use std::time::Duration;
4
5/// Timestamp of a frame, relative to the start of the stream.
6#[repr(transparent)]
7#[derive(Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Debug)]
8pub struct Timestamp(u64);
9
10impl Timestamp {
11    /// Timestamp equaling `0`.
12    pub const ZERO: Self = Self(0);
13
14    /// Creates a new timestamp from the given number of milliseconds.
15    #[must_use]
16    pub const fn from_millis(ts: u64) -> Self {
17        Self(ts)
18    }
19
20    /// The time of this timestamp in milliseconds.
21    #[must_use]
22    pub const fn as_millis(self) -> u64 {
23        self.0
24    }
25
26    pub(crate) fn as_native(self) -> c_longlong {
27        self.0
28            .try_into()
29            .expect("Could not convert u64 timestamp into native timestamp")
30    }
31}
32
33impl Sub for Timestamp {
34    type Output = Duration;
35
36    fn sub(self, rhs: Self) -> Self::Output {
37        let delta_ms = self.0 - rhs.0;
38        Duration::from_millis(delta_ms)
39    }
40}
41
42impl Add<Duration> for Timestamp {
43    type Output = Self;
44
45    fn add(self, rhs: Duration) -> Self::Output {
46        let rhs_u64: u64 = rhs
47            .as_millis()
48            .try_into()
49            .expect("Overflow when adding duration to timestamp");
50
51        Self(self.0 + rhs_u64)
52    }
53}
54
55#[cfg(test)]
56mod test {
57    use super::Timestamp;
58    use std::time::Duration;
59
60    #[test]
61    fn timestamps_work() {
62        let a = Timestamp::from_millis(0);
63        let b = Timestamp::from_millis(100);
64        let c = b + Duration::from_millis(100);
65
66        assert_eq!((b - a).as_millis(), 100);
67        assert_eq!(c.as_millis(), 200);
68    }
69}
openh264/time.rs

openh264/
time.rs
