1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use glib::{prelude::*, subclass::prelude::*, translate::*};
4
5use super::prelude::*;
6use crate::{ffi, Pad};
7
8pub trait PadImpl: PadImplExt + GstObjectImpl + Send + Sync {
9 fn linked(&self, peer: &Pad) {
10 self.parent_linked(peer)
11 }
12
13 fn unlinked(&self, peer: &Pad) {
14 self.parent_unlinked(peer)
15 }
16}
17
18mod sealed {
19 pub trait Sealed {}
20 impl<T: super::PadImplExt> Sealed for T {}
21}
22
23pub trait PadImplExt: sealed::Sealed + ObjectSubclass {
24 fn parent_linked(&self, peer: &Pad) {
25 unsafe {
26 let data = Self::type_data();
27 let parent_class = data.as_ref().parent_class() as *mut ffi::GstPadClass;
28
29 (*parent_class)
30 .linked
31 .map(|f| {
32 f(
33 self.obj().unsafe_cast_ref::<Pad>().to_glib_none().0,
34 peer.to_glib_none().0,
35 )
36 })
37 .unwrap_or(())
38 }
39 }
40
41 fn parent_unlinked(&self, peer: &Pad) {
42 unsafe {
43 let data = Self::type_data();
44 let parent_class = data.as_ref().parent_class() as *mut ffi::GstPadClass;
45
46 (*parent_class)
47 .unlinked
48 .map(|f| {
49 f(
50 self.obj().unsafe_cast_ref::<Pad>().to_glib_none().0,
51 peer.to_glib_none().0,
52 )
53 })
54 .unwrap_or(())
55 }
56 }
57}
58
59impl<T: PadImpl> PadImplExt for T {}
60
61unsafe impl<T: PadImpl> IsSubclassable<T> for Pad {
62 fn class_init(klass: &mut glib::Class<Self>) {
63 Self::parent_class_init::<T>(class:klass);
64 let klass: &mut GstPadClass = klass.as_mut();
65 klass.linked = Some(pad_linked::<T>);
66 klass.unlinked = Some(pad_unlinked::<T>);
67 }
68}
69
70unsafe extern "C" fn pad_linked<T: PadImpl>(ptr: *mut ffi::GstPad, peer: *mut ffi::GstPad) {
71 let instance: &::Instance = &*(ptr as *mut T::Instance);
72 let imp: &T = instance.imp();
73
74 imp.linked(&from_glib_borrow(ptr:peer))
75}
76
77unsafe extern "C" fn pad_unlinked<T: PadImpl>(ptr: *mut ffi::GstPad, peer: *mut ffi::GstPad) {
78 let instance: &::Instance = &*(ptr as *mut T::Instance);
79 let imp: &T = instance.imp();
80
81 imp.unlinked(&from_glib_borrow(ptr:peer))
82}
83
84#[cfg(test)]
85mod tests {
86 use std::sync::atomic;
87
88 use super::*;
89 use crate::{prelude::*, PadDirection};
90
91 pub mod imp {
92 use super::*;
93
94 #[derive(Default)]
95 pub struct TestPad {
96 pub(super) linked: atomic::AtomicBool,
97 pub(super) unlinked: atomic::AtomicBool,
98 }
99
100 #[glib::object_subclass]
101 impl ObjectSubclass for TestPad {
102 const NAME: &'static str = "TestPad";
103 type Type = super::TestPad;
104 type ParentType = Pad;
105 }
106
107 impl ObjectImpl for TestPad {}
108
109 impl GstObjectImpl for TestPad {}
110
111 impl PadImpl for TestPad {
112 fn linked(&self, peer: &Pad) {
113 self.linked.store(true, atomic::Ordering::SeqCst);
114 self.parent_linked(peer)
115 }
116
117 fn unlinked(&self, peer: &Pad) {
118 self.unlinked.store(true, atomic::Ordering::SeqCst);
119 self.parent_unlinked(peer)
120 }
121 }
122 }
123
124 glib::wrapper! {
125 pub struct TestPad(ObjectSubclass<imp::TestPad>) @extends Pad, crate::Object;
126 }
127
128 impl TestPad {
129 pub fn new(name: &str, direction: PadDirection) -> Self {
130 glib::Object::builder()
131 .property("name", name)
132 .property("direction", direction)
133 .build()
134 }
135 }
136
137 #[test]
138 fn test_pad_subclass() {
139 crate::init().unwrap();
140
141 let pad = TestPad::new("test", PadDirection::Src);
142
143 assert_eq!(pad.name(), "test");
144
145 let otherpad = Pad::builder(PadDirection::Sink).name("other-test").build();
146 pad.link(&otherpad).unwrap();
147 pad.unlink(&otherpad).unwrap();
148
149 let imp = pad.imp();
150 assert!(imp.linked.load(atomic::Ordering::SeqCst));
151 assert!(imp.unlinked.load(atomic::Ordering::SeqCst));
152 }
153}
154