gstreamer-rs/examples/src/bin/events.rs

extern crate gstreamer as gst;
use gst::prelude::*;

extern crate glib;

#[path = "../examples-common.rs"]
mod examples_common;

fn example_main() {
    gst::init().unwrap();

    let main_loop = glib::MainLoop::new(None, false);

    let pipeline = gst::parse_launch("audiotestsrc ! fakesink").unwrap();
    let bus = pipeline.get_bus().unwrap();

    let ret = pipeline.set_state(gst::State::Playing);
    assert_ne!(ret, gst::StateChangeReturn::Failure);

    let pipeline_weak = pipeline.downgrade();
    glib::timeout_add_seconds(5, move || {
        let pipeline = match pipeline_weak.upgrade() {
            Some(pipeline) => pipeline,
            None => return glib::Continue(false),
        };

        println!("sending eos");

        let ev = gst::Event::new_eos().build();
        pipeline.send_event(ev);

        glib::Continue(false)
    });

    //bus.add_signal_watch();
    //bus.connect_message(move |_, msg| {
    let main_loop_clone = main_loop.clone();
    bus.add_watch(move |_, msg| {
        use gst::MessageView;

        let main_loop = &main_loop_clone;
        match msg.view() {
            MessageView::Eos(..) => {
                println!("received eos");
                main_loop.quit()
            }
            MessageView::Error(err) => {
                println!(
                    "Error from {:?}: {} ({:?})",
                    err.get_src().map(|s| s.get_path_string()),
                    err.get_error(),
                    err.get_debug()
                );
                main_loop.quit();
            }
            _ => (),
        };

        glib::Continue(true)
    });

    main_loop.run();

    let ret = pipeline.set_state(gst::State::Null);
    assert_ne!(ret, gst::StateChangeReturn::Failure);

    bus.remove_watch();
}

fn main() {
    // tutorials_common::run is only required to set up the application environent on macOS
    // (but not necessary in normal Cocoa applications where this is set up autmatically)
    examples_common::run(example_main);
}