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

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

extern crate futures;
use futures::executor::block_on;
use futures::prelude::*;

use std::env;

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

fn example_main() {
    let pipeline_str = env::args().collect::<Vec<String>>()[1..].join(" ");

    gst::init().unwrap();

    let pipeline = gst::parse_launch(&pipeline_str).unwrap();
    let bus = pipeline.get_bus().unwrap();

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

    let messages = gst::BusStream::new(&bus)
        .for_each(|msg| {
            use gst::MessageView;

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

            if quit {
                Err(())
            } else {
                Ok(())
            }
        })
        .and_then(|_| Ok(()));

    let _ = block_on(messages);

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

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);
}