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|
use gst::prelude::*;
use gtk::prelude::*;
use gtk::{gdk, gio, glib};
use std::cell::RefCell;
fn create_ui(app: >k::Application) {
let pipeline = gst::Pipeline::new();
let overlay = gst::ElementFactory::make("clockoverlay")
.property("font-desc", "Monospace 42")
.build()
.unwrap();
let gtksink = gst::ElementFactory::make("gtk4paintablesink")
.build()
.unwrap();
let paintable = gtksink.property::<gdk::Paintable>("paintable");
// TODO: future plans to provide a bin-like element that works with less setup
let (src, sink) = if paintable
.property::<Option<gdk::GLContext>>("gl-context")
.is_some()
{
let src = gst::ElementFactory::make("gltestsrc").build().unwrap();
let sink = gst::ElementFactory::make("glsinkbin")
.property("sink", >ksink)
.build()
.unwrap();
(src, sink)
} else {
let src = gst::ElementFactory::make("videotestsrc").build().unwrap();
let sink = gst::Bin::default();
let convert = gst::ElementFactory::make("videoconvert").build().unwrap();
sink.add(&convert).unwrap();
sink.add(>ksink).unwrap();
convert.link(>ksink).unwrap();
sink.add_pad(&gst::GhostPad::with_target(&convert.static_pad("sink").unwrap()).unwrap())
.unwrap();
(src, sink.upcast())
};
pipeline.add_many([&src, &overlay, &sink]).unwrap();
let caps = gst_video::VideoCapsBuilder::new()
.width(640)
.height(480)
.any_features()
.build();
src.link_filtered(&overlay, &caps).unwrap();
overlay.link(&sink).unwrap();
let window = gtk::ApplicationWindow::new(app);
window.set_default_size(640, 480);
let vbox = gtk::Box::new(gtk::Orientation::Vertical, 0);
let gst_widget = gstgtk4::RenderWidget::new(>ksink);
vbox.append(&gst_widget);
let label = gtk::Label::new(Some("Position: 00:00:00"));
vbox.append(&label);
window.set_child(Some(&vbox));
window.present();
app.add_window(&window);
let pipeline_weak = pipeline.downgrade();
let timeout_id = glib::timeout_add_local(std::time::Duration::from_millis(500), move || {
let Some(pipeline) = pipeline_weak.upgrade() else {
return glib::ControlFlow::Break;
};
let position = pipeline.query_position::<gst::ClockTime>();
label.set_text(&format!("Position: {:.0}", position.display()));
glib::ControlFlow::Continue
});
let bus = pipeline.bus().unwrap();
pipeline
.set_state(gst::State::Playing)
.expect("Unable to set the pipeline to the `Playing` state");
let app_weak = app.downgrade();
let bus_watch = bus
.add_watch_local(move |_, msg| {
use gst::MessageView;
let Some(app) = app_weak.upgrade() else {
return glib::ControlFlow::Break;
};
match msg.view() {
MessageView::Eos(..) => app.quit(),
MessageView::Error(err) => {
println!(
"Error from {:?}: {} ({:?})",
err.src().map(|s| s.path_string()),
err.error(),
err.debug()
);
app.quit();
}
_ => (),
};
glib::ControlFlow::Continue
})
.expect("Failed to add bus watch");
let timeout_id = RefCell::new(Some(timeout_id));
let pipeline = RefCell::new(Some(pipeline));
let bus_watch = RefCell::new(Some(bus_watch));
app.connect_shutdown(move |_| {
window.close();
drop(bus_watch.borrow_mut().take());
if let Some(pipeline) = pipeline.borrow_mut().take() {
pipeline
.set_state(gst::State::Null)
.expect("Unable to set the pipeline to the `Null` state");
}
if let Some(timeout_id) = timeout_id.borrow_mut().take() {
timeout_id.remove();
}
});
}
fn main() -> glib::ExitCode {
gst::init().unwrap();
gtk::init().unwrap();
gstgtk4::plugin_register_static().expect("Failed to register gstgtk4 plugin");
let app = gtk::Application::new(None::<&str>, gio::ApplicationFlags::FLAGS_NONE);
app.connect_activate(create_ui);
let res = app.run();
unsafe {
gst::deinit();
}
res
}
|
