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use glib::prelude::*;
use glib::subclass::prelude::*;
use glib::translate::*;
use crate::Pad;
pub trait PadImpl: PadImplExt + ObjectImpl + Send + Sync {
fn linked(&self, pad: &Self::Type, peer: &Pad) {
self.parent_linked(pad, peer)
}
fn unlinked(&self, pad: &Self::Type, peer: &Pad) {
self.parent_unlinked(pad, peer)
}
}
pub trait PadImplExt: ObjectSubclass {
fn parent_linked(&self, pad: &Self::Type, peer: &Pad);
fn parent_unlinked(&self, pad: &Self::Type, peer: &Pad);
}
impl<T: PadImpl> PadImplExt for T {
fn parent_linked(&self, pad: &Self::Type, peer: &Pad) {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstPadClass;
(*parent_class)
.linked
.map(|f| {
f(
pad.unsafe_cast_ref::<Pad>().to_glib_none().0,
peer.to_glib_none().0,
)
})
.unwrap_or(())
}
}
fn parent_unlinked(&self, pad: &Self::Type, peer: &Pad) {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstPadClass;
(*parent_class)
.unlinked
.map(|f| {
f(
pad.unsafe_cast_ref::<Pad>().to_glib_none().0,
peer.to_glib_none().0,
)
})
.unwrap_or(())
}
}
}
unsafe impl<T: PadImpl> IsSubclassable<T> for Pad {
fn class_init(klass: &mut glib::Class<Self>) {
<glib::Object as IsSubclassable<T>>::class_init(klass);
let klass = klass.as_mut();
klass.linked = Some(pad_linked::<T>);
klass.unlinked = Some(pad_unlinked::<T>);
}
fn instance_init(instance: &mut glib::subclass::InitializingObject<T>) {
<glib::Object as IsSubclassable<T>>::instance_init(instance);
}
}
unsafe extern "C" fn pad_linked<T: PadImpl>(ptr: *mut ffi::GstPad, peer: *mut ffi::GstPad) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.impl_();
let wrap: Borrowed<Pad> = from_glib_borrow(ptr);
imp.linked(wrap.unsafe_cast_ref(), &from_glib_borrow(peer))
}
unsafe extern "C" fn pad_unlinked<T: PadImpl>(ptr: *mut ffi::GstPad, peer: *mut ffi::GstPad) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.impl_();
let wrap: Borrowed<Pad> = from_glib_borrow(ptr);
imp.unlinked(wrap.unsafe_cast_ref(), &from_glib_borrow(peer))
}
#[cfg(test)]
mod tests {
use super::*;
use crate::prelude::*;
use std::sync::atomic;
use crate::PadDirection;
pub mod imp {
use super::*;
#[derive(Default)]
pub struct TestPad {
pub(super) linked: atomic::AtomicBool,
pub(super) unlinked: atomic::AtomicBool,
}
#[glib::object_subclass]
impl ObjectSubclass for TestPad {
const NAME: &'static str = "TestPad";
type Type = super::TestPad;
type ParentType = Pad;
}
impl ObjectImpl for TestPad {}
impl PadImpl for TestPad {
fn linked(&self, pad: &Self::Type, peer: &Pad) {
self.linked.store(true, atomic::Ordering::SeqCst);
self.parent_linked(pad, peer)
}
fn unlinked(&self, pad: &Self::Type, peer: &Pad) {
self.unlinked.store(true, atomic::Ordering::SeqCst);
self.parent_unlinked(pad, peer)
}
}
}
glib::wrapper! {
pub struct TestPad(ObjectSubclass<imp::TestPad>) @extends Pad, crate::Object;
}
unsafe impl Send for TestPad {}
unsafe impl Sync for TestPad {}
impl TestPad {
pub fn new(name: &str, direction: PadDirection) -> Self {
glib::Object::new(&[("name", &name), ("direction", &direction)]).unwrap()
}
}
#[test]
fn test_pad_subclass() {
crate::init().unwrap();
let pad = TestPad::new("test", PadDirection::Src);
assert_eq!(pad.name(), "test");
let otherpad = Pad::new(Some("other-test"), PadDirection::Sink);
pad.link(&otherpad).unwrap();
pad.unlink(&otherpad).unwrap();
let imp = imp::TestPad::from_instance(&pad);
assert!(imp.linked.load(atomic::Ordering::SeqCst));
assert!(imp.unlinked.load(atomic::Ordering::SeqCst));
}
}