cameras 0.3.1

A cross-platform camera library for Rust, built with data-oriented design. Explicit format negotiation, push-based frame delivery, typed errors, and zero trait objects.
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

//! Print camera hotplug events as they happen.
//!
//! Demonstrates `cameras::monitor` and `cameras::next_event`. The monitor
//! emits an `Added` event for every device already present when it starts,
//! then streams live `Added` / `Removed` events as cameras appear and
//! disappear.
//!
//! ```bash
//! cargo run --example monitor   # watches until Ctrl-C
//! ```

use std::error::Error;
use std::time::Duration;

use cameras::{DeviceEvent, Error as CamerasError};

fn main() -> Result<(), Box<dyn Error>> {
    let monitor = cameras::monitor()?;
    println!("watching for camera hotplug (Ctrl-C to exit)");

    loop {
        match cameras::next_event(&monitor, Duration::from_secs(1)) {
            Ok(DeviceEvent::Added(device)) => println!("+ {} ({})", device.name, device.id.0),
            Ok(DeviceEvent::Removed(id)) => println!("- {}", id.0),
            Ok(_) => continue,
            Err(CamerasError::Timeout) => continue,
            Err(err) => return Err(err.into()),
        }
    }
}