libpulse-binding 2.2.0

A Rust language binding for the PulseAudio libpulse library.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81

//! Time handling functionality.

// This file is part of the PulseAudio Rust language binding.
//
// Copyright (c) 2017 Lyndon Brown
//
// This library is free software; you can redistribute it and/or modify it under the terms of the
// GNU Lesser General Public License as published by the Free Software Foundation; either version
// 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
// even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License along with this library;
// if not, see <http://www.gnu.org/licenses/>.

mod microseconds;
mod monotonic;
mod timeval;
mod unix;

use capi;
use std::time::Duration;

pub use self::microseconds::*;
pub use self::monotonic::*;
pub use self::timeval::*;
pub use self::unix::*;

// (Copied constants from rust's std/time/duration.rs)
pub const NANOS_PER_SEC: u32 = 1_000_000_000;
pub const NANOS_PER_MILLI: u32 = 1_000_000;
pub const NANOS_PER_MICRO: u32 = 1_000;
pub const MICROS_PER_SEC: u64 = 1_000_000;
pub const MICROS_PER_MILLI: u64 = 1_000;
pub const MILLIS_PER_SEC: u64 = 1_000;

/// Invalid time. Microseconds value representing 'invalid'.
pub const USEC_INVALID: MicroSeconds = MicroSeconds(capi::PA_USEC_INVALID);

/// Largest valid time value in microseconds (largest integer value is reserved for representing
/// 'invalid').
pub const USEC_MAX: MicroSeconds = MicroSeconds(capi::PA_USEC_MAX);

impl From<Timeval> for MicroSeconds {
    fn from(t: Timeval) -> Self {
        MicroSeconds(unsafe { capi::pa_timeval_load(&t.0) })
    }
}
impl From<MicroSeconds> for Timeval {
    fn from(t: MicroSeconds) -> Self {
        let secs = t.0 / MICROS_PER_SEC;
        let usecs = t.0 % MICROS_PER_SEC;
        Timeval::new(secs as i64, usecs as i64)
    }
}

impl From<Duration> for MicroSeconds {
    fn from(t: Duration) -> Self {
        let mut usecs = t.as_secs() * MILLIS_PER_SEC;
        usecs += (t.subsec_nanos() / NANOS_PER_MILLI) as u64;
        MicroSeconds(usecs)
    }
}
impl From<MicroSeconds> for Duration {
    fn from(t: MicroSeconds) -> Self {
        Duration::from_millis(t.0)
    }
}

impl From<Duration> for Timeval {
    fn from(t: Duration) -> Self {
        Timeval::new(t.as_secs() as i64, (t.subsec_nanos() / NANOS_PER_MILLI) as i64)
    }
}
impl From<Timeval> for Duration {
    fn from(t: Timeval) -> Self {
        Duration::from_millis((MicroSeconds::from(t)).0)
    }
}