gstreamer_video/subclass/
navigation.rs

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 crate::{ffi, Navigation};
6
7pub trait NavigationImpl: ObjectImpl + ObjectSubclass<Type: IsA<Navigation>> {
8    fn send_event(&self, structure: gst::Structure);
9
10    #[cfg(feature = "v1_22")]
11    #[cfg_attr(docsrs, doc(cfg(feature = "v1_22")))]
12    fn send_event_simple(&self, event: gst::Event) {
13        if let Some(structure) = event.structure() {
14            self.send_event(structure.to_owned());
15        }
16    }
17}
18
19pub trait NavigationImplExt: NavigationImpl {
20    fn parent_send_event(&self, structure: gst::Structure) {
21        unsafe {
22            let type_data = Self::type_data();
23            let parent_iface = type_data.as_ref().parent_interface::<Navigation>()
24                as *const ffi::GstNavigationInterface;
25
26            let func = match (*parent_iface).send_event {
27                Some(func) => func,
28                None => return,
29            };
30
31            func(
32                self.obj().unsafe_cast_ref::<Navigation>().to_glib_none().0,
33                structure.into_glib_ptr(),
34            );
35        }
36    }
37
38    #[cfg(feature = "v1_22")]
39    #[cfg_attr(docsrs, doc(cfg(feature = "v1_22")))]
40    fn parent_send_event_simple(&self, event: gst::Event) {
41        unsafe {
42            let type_data = Self::type_data();
43            let parent_iface = type_data.as_ref().parent_interface::<Navigation>()
44                as *const ffi::GstNavigationInterface;
45
46            let func = match (*parent_iface).send_event_simple {
47                Some(func) => func,
48                None => return,
49            };
50
51            func(
52                self.obj().unsafe_cast_ref::<Navigation>().to_glib_none().0,
53                event.into_glib_ptr(),
54            );
55        }
56    }
57}
58
59impl<T: NavigationImpl> NavigationImplExt for T {}
60
61unsafe impl<T: NavigationImpl> IsImplementable<T> for Navigation {
62    #[cfg(not(any(feature = "v1_22", docsrs)))]
63    fn interface_init(iface: &mut glib::Interface<Self>) {
64        let iface = iface.as_mut();
65
66        iface.send_event = Some(navigation_send_event::<T>);
67    }
68
69    #[cfg(feature = "v1_22")]
70    #[cfg_attr(docsrs, doc(cfg(feature = "v1_22")))]
71    fn interface_init(iface: &mut glib::Interface<Self>) {
72        let iface = iface.as_mut();
73
74        iface.send_event = Some(navigation_send_event::<T>);
75        iface.send_event_simple = Some(navigation_send_event_simple::<T>);
76    }
77}
78
79unsafe extern "C" fn navigation_send_event<T: NavigationImpl>(
80    nav: *mut ffi::GstNavigation,
81    structure: *mut gst::ffi::GstStructure,
82) {
83    let instance = &*(nav as *mut T::Instance);
84    let imp = instance.imp();
85
86    imp.send_event(from_glib_full(structure));
87}
88
89#[cfg(feature = "v1_22")]
90#[cfg_attr(docsrs, doc(cfg(feature = "v1_22")))]
91unsafe extern "C" fn navigation_send_event_simple<T: NavigationImpl>(
92    nav: *mut ffi::GstNavigation,
93    event: *mut gst::ffi::GstEvent,
94) {
95    let instance = &*(nav as *mut T::Instance);
96    let imp = instance.imp();
97
98    imp.send_event_simple(from_glib_full(event));
99}
gstreamer_video/subclass/navigation.rs

gstreamer_video/subclass/
navigation.rs
