Bindings to GstTracer and GstTracerFactory

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/issues/147

gstreamer/Gir.toml

@@ -1975,6 +1975,11 @@ status = "generate"
     # confusing return type
     ignore = true
 
+    [[object.function]]
+    name = "tracing_register_hook"
+    # implemented as part of Tracer subclassing
+    manual = true
+
 [[object]]
 name = "Gst.StateChange"
 status = "generate"
@@ -2174,3 +2179,15 @@ generate_builder = true
         [[object.function.parameter]]
         name = "timestamp"
         mandatory = true
+
+[[object]]
+name = "Gst.Tracer"
+status = "generate"
+    [[object.function]]
+    name = "register"
+    # Manual implementation as inherent to the type.
+    ignore = true
+
+[[object]]
+name = "Gst.TracerFactory"
+status = "generate"

gstreamer/src/auto/functions.rs

@@ -14,6 +14,9 @@ use crate::PluginAPIFlags;
 #[cfg(any(feature = "v1_12", feature = "dox"))]
 #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_12")))]
 use crate::StackTraceFlags;
+#[cfg(any(feature = "v1_18", feature = "dox"))]
+#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
+use crate::Tracer;
 use glib::object::IsA;
 use glib::translate::*;
 use std::mem;
@@ -236,17 +239,13 @@ pub fn parse_launchv(argv: &[&str]) -> Result<Element, glib::Error> {
     }
 }
 
-//#[cfg(any(feature = "v1_18", feature = "dox"))]
-//#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
-//#[doc(alias = "gst_tracing_get_active_tracers")]
-//pub fn tracing_get_active_tracers() -> /*Ignored*/Vec<Tracer> {
-//    unsafe { TODO: call ffi:gst_tracing_get_active_tracers() }
-//}
-
-//#[doc(alias = "gst_tracing_register_hook")]
-//pub fn tracing_register_hook<P: FnOnce() + Send + Sync + 'static>(tracer: /*Ignored*/&Tracer, detail: &str, func: P) {
-//    unsafe { TODO: call ffi:gst_tracing_register_hook() }
-//}
+#[cfg(any(feature = "v1_18", feature = "dox"))]
+#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
+#[doc(alias = "gst_tracing_get_active_tracers")]
+pub fn tracing_get_active_tracers() -> Vec<Tracer> {
+    assert_initialized_main_thread!();
+    unsafe { FromGlibPtrContainer::from_glib_full(ffi::gst_tracing_get_active_tracers()) }
+}
 
 #[cfg(any(feature = "v1_18", feature = "dox"))]
 #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]

gstreamer/src/auto/mod.rs

@@ -98,6 +98,12 @@ pub use self::tag_setter::{TagSetter, NONE_TAG_SETTER};
 mod toc_setter;
 pub use self::toc_setter::{TocSetter, NONE_TOC_SETTER};
 
+mod tracer;
+pub use self::tracer::{Tracer, NONE_TRACER};
+
+mod tracer_factory;
+pub use self::tracer_factory::TracerFactory;
+
 mod type_find_factory;
 pub use self::type_find_factory::TypeFindFactory;
 
@@ -219,5 +225,6 @@ pub mod traits {
     pub use super::system_clock::SystemClockExt;
     pub use super::tag_setter::TagSetterExt;
     pub use super::toc_setter::TocSetterExt;
+    pub use super::tracer::TracerExt;
     pub use super::uri_handler::URIHandlerExt;
 }

gstreamer/src/auto/tracer.rs

@@ -0,0 +1,89 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// from gst-gir-files (https://gitlab.freedesktop.org/gstreamer/gir-files-rs.git)
+// DO NOT EDIT
+
+use crate::Object;
+use glib::object::Cast;
+use glib::object::IsA;
+use glib::signal::connect_raw;
+use glib::signal::SignalHandlerId;
+use glib::translate::*;
+use glib::StaticType;
+use glib::ToValue;
+use std::boxed::Box as Box_;
+use std::mem::transmute;
+
+glib::wrapper! {
+    #[doc(alias = "GstTracer")]
+    pub struct Tracer(Object<ffi::GstTracer, ffi::GstTracerClass>) @extends Object;
+
+    match fn {
+        type_ => || ffi::gst_tracer_get_type(),
+    }
+}
+
+unsafe impl Send for Tracer {}
+unsafe impl Sync for Tracer {}
+
+pub const NONE_TRACER: Option<&Tracer> = None;
+
+pub trait TracerExt: 'static {
+    fn params(&self) -> Option<glib::GString>;
+
+    fn set_params(&self, params: Option<&str>);
+
+    #[doc(alias = "params")]
+    fn connect_params_notify<F: Fn(&Self) + Send + Sync + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Tracer>> TracerExt for O {
+    fn params(&self) -> Option<glib::GString> {
+        unsafe {
+            let mut value = glib::Value::from_type(<glib::GString as StaticType>::static_type());
+            glib::gobject_ffi::g_object_get_property(
+                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
+                b"params\0".as_ptr() as *const _,
+                value.to_glib_none_mut().0,
+            );
+            value
+                .get()
+                .expect("Return Value for property `params` getter")
+        }
+    }
+
+    fn set_params(&self, params: Option<&str>) {
+        unsafe {
+            glib::gobject_ffi::g_object_set_property(
+                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
+                b"params\0".as_ptr() as *const _,
+                params.to_value().to_glib_none().0,
+            );
+        }
+    }
+
+    fn connect_params_notify<F: Fn(&Self) + Send + Sync + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe extern "C" fn notify_params_trampoline<
+            P: IsA<Tracer>,
+            F: Fn(&P) + Send + Sync + 'static,
+        >(
+            this: *mut ffi::GstTracer,
+            _param_spec: glib::ffi::gpointer,
+            f: glib::ffi::gpointer,
+        ) {
+            let f: &F = &*(f as *const F);
+            f(Tracer::from_glib_borrow(this).unsafe_cast_ref())
+        }
+        unsafe {
+            let f: Box_<F> = Box_::new(f);
+            connect_raw(
+                self.as_ptr() as *mut _,
+                b"notify::params\0".as_ptr() as *const _,
+                Some(transmute::<_, unsafe extern "C" fn()>(
+                    notify_params_trampoline::<Self, F> as *const (),
+                )),
+                Box_::into_raw(f),
+            )
+        }
+    }
+}

gstreamer/src/auto/tracer_factory.rs

@@ -0,0 +1,41 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// from gst-gir-files (https://gitlab.freedesktop.org/gstreamer/gir-files-rs.git)
+// DO NOT EDIT
+
+use crate::Object;
+use crate::PluginFeature;
+use glib::translate::*;
+
+glib::wrapper! {
+    #[doc(alias = "GstTracerFactory")]
+    pub struct TracerFactory(Object<ffi::GstTracerFactory, ffi::GstTracerFactoryClass>) @extends PluginFeature, Object;
+
+    match fn {
+        type_ => || ffi::gst_tracer_factory_get_type(),
+    }
+}
+
+impl TracerFactory {
+    #[cfg(any(feature = "v1_14", feature = "dox"))]
+    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
+    #[doc(alias = "gst_tracer_factory_get_tracer_type")]
+    #[doc(alias = "get_tracer_type")]
+    pub fn tracer_type(&self) -> glib::types::Type {
+        unsafe {
+            from_glib(ffi::gst_tracer_factory_get_tracer_type(
+                self.to_glib_none().0,
+            ))
+        }
+    }
+
+    #[doc(alias = "gst_tracer_factory_get_list")]
+    #[doc(alias = "get_list")]
+    pub fn list() -> Vec<TracerFactory> {
+        assert_initialized_main_thread!();
+        unsafe { FromGlibPtrContainer::from_glib_full(ffi::gst_tracer_factory_get_list()) }
+    }
+}
+
+unsafe impl Send for TracerFactory {}
+unsafe impl Sync for TracerFactory {}

gstreamer/src/lib.rs

@@ -139,6 +139,8 @@ pub use self::allocation_params::AllocationParams;
 mod element_factory_list_type;
 pub use element_factory_list_type::*;
 
+mod tracer;
+
 // OS dependent Bus extensions (also import the other plateform mod for doc)
 #[cfg(any(feature = "v1_14", feature = "dox"))]
 #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]

gstreamer/src/subclass/mod.rs

@@ -21,6 +21,7 @@ mod element;
 mod ghost_pad;
 mod pad;
 mod pipeline;
+mod tracer;
 
 mod device;
 mod device_provider;
@@ -54,5 +55,6 @@ pub mod prelude {
     pub use super::preset::PresetImpl;
     pub use super::system_clock::SystemClockImpl;
     pub use super::tag_setter::TagSetterImpl;
+    pub use super::tracer::{TracerHook, TracerImpl, TracerImplExt};
     pub use super::uri_handler::{URIHandlerImpl, URIHandlerImplExt};
 }

gstreamer/src/subclass/tracer.rs

@@ -0,0 +1,257 @@
+// Take a look at the license at the top of the repository in the LICENSE file.
+
+use crate::ffi;
+use crate::{
+    Bin, Buffer, BufferList, Element, Event, FlowReturn, Message, Object, Pad, PadLinkReturn,
+    Query, StateChange, StateChangeReturn, Tracer,
+};
+use glib::{prelude::*, subclass::prelude::*, translate::*};
+
+#[allow(unused_variables)]
+pub trait TracerImpl: TracerImplExt + ObjectImpl + Send + Sync {
+    fn bin_add_post(&self, ts: u64, bin: &Bin, element: &Element, success: bool) {}
+    fn bin_add_pre(&self, ts: u64, bin: &Bin, element: &Element) {}
+    fn bin_remove_post(&self, ts: u64, bin: &Bin, success: bool) {}
+    fn bin_remove_pre(&self, ts: u64, bin: &Bin, element: &Element) {}
+    fn element_add_pad(&self, ts: u64, element: &Element, pad: &Pad) {}
+    fn element_change_state_post(
+        &self,
+        ts: u64,
+        element: &Element,
+        change: StateChange,
+        result: StateChangeReturn,
+    ) {
+    }
+    fn element_change_state_pre(&self, ts: u64, element: &Element, change: StateChange) {}
+    fn element_new(&self, ts: u64, element: &Element) {}
+    fn element_post_message_post(&self, ts: u64, element: &Element, success: bool) {}
+    fn element_post_message_pre(&self, ts: u64, element: &Element, message: &Message) {}
+    fn element_query_post(&self, ts: u64, element: &Element, query: &Query, success: bool) {}
+    fn element_query_pre(&self, ts: u64, element: &Element, query: &Query) {}
+    fn element_remove_pad(&self, ts: u64, element: &Element, pad: &Pad) {}
+    fn object_created(&self, ts: u64, object: &Object) {}
+    /// Hook to be called after the GstObject has been finalized.
+    fn object_destroyed(&self, ts: u64, object: std::ptr::NonNull<ffi::GstObject>) {}
+    fn object_reffed(&self, ts: u64, object: &Object, new_refcount: i32) {}
+    fn object_unreffed(&self, ts: u64, object: &Object, new_refcount: i32) {}
+    fn pad_link_post(&self, ts: u64, src: &Pad, sink: &Pad, result: PadLinkReturn) {}
+    fn pad_link_pre(&self, ts: u64, src: &Pad, sink: &Pad) {}
+    fn pad_pull_range_post(&self, ts: u64, pad: &Pad, buffer: &Buffer, result: FlowReturn) {}
+    fn pad_pull_range_pre(&self, ts: u64, pad: &Pad, offset: u64, size: u32) {}
+    fn pad_push_event_post(&self, ts: u64, pad: &Pad, success: bool) {}
+    fn pad_push_event_pre(&self, ts: u64, pad: &Pad, event: &Event) {}
+    fn pad_push_list_post(&self, ts: u64, pad: &Pad, result: FlowReturn) {}
+    fn pad_push_list_pre(&self, ts: u64, pad: &Pad, buffer_list: &BufferList) {}
+    fn pad_push_post(&self, ts: u64, pad: &Pad, result: FlowReturn) {}
+    fn pad_push_pre(&self, ts: u64, pad: &Pad, buffer: &Buffer) {}
+    fn pad_query_post(&self, ts: u64, pad: &Pad, query: &Query, success: bool) {}
+    fn pad_query_pre(&self, ts: u64, pad: &Pad, query: &Query) {}
+    fn pad_unlink_post(&self, ts: u64, src: &Pad, sink: &Pad, success: bool) {}
+    fn pad_unlink_pre(&self, ts: u64, src: &Pad, sink: &Pad) {}
+}
+
+unsafe impl<T: TracerImpl> IsSubclassable<T> for Tracer {
+    fn class_init(klass: &mut glib::Class<Self>) {
+        <glib::Object as IsSubclassable<T>>::class_init(klass);
+    }
+
+    fn instance_init(instance: &mut glib::subclass::InitializingObject<T>) {
+        <glib::Object as IsSubclassable<T>>::instance_init(instance);
+    }
+}
+
+pub trait TracerImplExt: ObjectSubclass {
+    /// Register a corresponding hook to be called for this tracer when certain events occur.
+    ///
+    /// Upon an event a corresponding method in `TracerImpl` will be called.
+    fn register_hook(&self, hook: TracerHook);
+}
+
+macro_rules! define_tracer_hooks {
+    ($($name: ident($quark: literal) = |$this: ident, $ts: ident, $($cb_arg: ident: $cb_arg_ty: ty),*| $impl: block;)*) => {
+        pub enum TracerHook {
+            $($name),*
+        }
+        impl<T: TracerImpl> TracerImplExt for T {
+            fn register_hook(&self, hook: TracerHook) {
+                use TracerHook::*;
+                let (hook_type, callback) = match hook {
+                    $($name => {
+                        #[allow(non_snake_case)]
+                        unsafe extern "C" fn callback<T: TracerImpl>(
+                            $this: *mut ffi::GstTracer,
+                            $ts: u64,
+                            $($cb_arg: $cb_arg_ty),*
+                        ) {
+                            let $this = Tracer::from_glib_borrow($this);
+                            let $this = T::from_instance($this.unsafe_cast_ref());
+                            $impl
+                        }
+                        (
+                            concat!($quark, "\0"),
+                            callback::<T> as unsafe extern "C" fn(_, _, $($cb_arg_ty),*) as *const ()
+                        )
+                    },)*
+                };
+                unsafe {
+                    let instance = self.instance();
+                    ffi::gst_tracing_register_hook(
+                        instance.to_glib_none().0 as *mut ffi::GstTracer,
+                        hook_type.as_ptr() as *const _,
+                        Some(std::mem::transmute::<_, extern "C" fn()>(callback)),
+                    );
+                }
+            }
+        }
+    };
+}
+
+define_tracer_hooks! {
+    BinAddPost("bin-add-post") = |this, ts, b: *mut ffi::GstBin, e: *mut ffi::GstElement, r: glib::ffi::gboolean| {
+        let b = Bin::from_glib_borrow(b);
+        let e = Element::from_glib_borrow(e);
+        this.bin_add_post(ts, &b, &e, bool::from_glib(r))
+    };
+    BinAddPre("bin-add-pre") = |this, ts, b: *mut ffi::GstBin, e: *mut ffi::GstElement| {
+        let b = Bin::from_glib_borrow(b);
+        let e = Element::from_glib_borrow(e);
+        this.bin_add_pre(ts, &b, &e)
+    };
+    BinRemovePost("bin-remove-post") = |this, ts, b: *mut ffi::GstBin, r: glib::ffi::gboolean| {
+        let b = Bin::from_glib_borrow(b);
+        this.bin_remove_post(ts, &b, bool::from_glib(r))
+    };
+    BinRemovePre("bin-remove-pre") = |this, ts, b: *mut ffi::GstBin, e: *mut ffi::GstElement| {
+        let b = Bin::from_glib_borrow(b);
+        let e = Element::from_glib_borrow(e);
+        this.bin_remove_pre(ts, &b, &e)
+    };
+    ElementAddPad("element-add-pad") = |this, ts, e: *mut ffi::GstElement, p: *mut ffi::GstPad| {
+        let e = Element::from_glib_borrow(e);
+        let p = Pad::from_glib_borrow(p);
+        this.element_add_pad(ts, &e, &p)
+    };
+    ElementChangeStatePost("element-change-state-post") = |this, ts, e: *mut ffi::GstElement, c: ffi::GstStateChange, r: ffi::GstStateChangeReturn| {
+        let e = Element::from_glib_borrow(e);
+        this.element_change_state_post(ts, &e, StateChange::from_glib(c), StateChangeReturn::from_glib(r))
+    };
+    ElementChangeStatePre("element-change-state-pre") = |this, ts, e: *mut ffi::GstElement, c: ffi::GstStateChange| {
+        let e = Element::from_glib_borrow(e);
+        this.element_change_state_pre(ts, &e, StateChange::from_glib(c))
+    };
+    ElementNew("element-new") = |this, ts, e: *mut ffi::GstElement| {
+        let e = Element::from_glib_borrow(e);
+        this.element_new(ts, &e)
+    };
+    ElementPostMessagePost("element-post-message-post") = |this, ts, e: *mut ffi::GstElement, r: glib::ffi::gboolean| {
+        let e = Element::from_glib_borrow(e);
+        this.element_post_message_post(ts, &e, bool::from_glib(r))
+    };
+    ElementPostMessagePre("element-post-message-pre") = |this, ts, e: *mut ffi::GstElement, m: *mut ffi::GstMessage| {
+        let e = Element::from_glib_borrow(e);
+        let m = Message::from_glib_borrow(m);
+        this.element_post_message_pre(ts, &e, &m)
+    };
+    ElementQueryPost("element-query-post") = |this, ts, e: *mut ffi::GstElement, q: *mut ffi::GstQuery, r: glib::ffi::gboolean| {
+        let e = Element::from_glib_borrow(e);
+        let q = Query::from_glib_borrow(q);
+        this.element_query_post(ts, &e, &q, bool::from_glib(r))
+    };
+    ElementQueryPre("element-query-pre") = |this, ts, e: *mut ffi::GstElement, q: *mut ffi::GstQuery| {
+        let e = Element::from_glib_borrow(e);
+        let q = Query::from_glib_borrow(q);
+        this.element_query_pre(ts, &e, &q)
+    };
+    ElementRemovePad("element-remove-pad") = |this, ts, e: *mut ffi::GstElement, p: *mut ffi::GstPad| {
+        let e = Element::from_glib_borrow(e);
+        let p = Pad::from_glib_borrow(p);
+        this.element_remove_pad(ts, &e, &p)
+    };
+    // TODO(#353): Missing bindings to `GstMiniObject`.
+    // MiniObjectCreated,
+    // MiniObjectDestroyed,
+    // MiniObjectReffed,
+    // MiniObjectUnreffed,
+    ObjectCreated("object-created") = |this, ts, o: *mut ffi::GstObject| {
+        let o = Object::from_glib_borrow(o);
+        this.object_created(ts, &o)
+    };
+    // TODO: unclear what to do here as the `GstObject` here is no longer valid…
+    ObjectDestroyed("object-destroyed") = |this, ts, o: *mut ffi::GstObject| {
+        this.object_destroyed(ts, std::ptr::NonNull::new_unchecked(o))
+    };
+    ObjectReffed("object-reffed") = |this, ts, o: *mut ffi::GstObject, rc: libc::c_int| {
+        let o = Object::from_glib_borrow(o);
+        this.object_reffed(ts, &o, rc as i32)
+    };
+    ObjectUnreffed("object-unreffed") = |this, ts, o: *mut ffi::GstObject, rc: libc::c_int| {
+        let o = Object::from_glib_borrow(o);
+        this.object_unreffed(ts, &o, rc as i32)
+    };
+    PadLinkPost("pad-link-post") = |this, ts, src: *mut ffi::GstPad, sink: *mut ffi::GstPad, r: ffi::GstPadLinkReturn| {
+        let src = Pad::from_glib_borrow(src);
+        let sink = Pad::from_glib_borrow(sink);
+        this.pad_link_post(ts, &src, &sink, PadLinkReturn::from_glib(r))
+    };
+    PadLinkPre("pad-link-pre") = |this, ts, src: *mut ffi::GstPad, sink: *mut ffi::GstPad| {
+        let src = Pad::from_glib_borrow(src);
+        let sink = Pad::from_glib_borrow(sink);
+        this.pad_link_pre(ts, &src, &sink)
+    };
+    PadPullRangePost("pad-pull-range-post") = |this, ts, p: *mut ffi::GstPad, b: *mut ffi::GstBuffer, r: ffi::GstFlowReturn| {
+        let p = Pad::from_glib_borrow(p);
+        let b = Buffer::from_glib_borrow(b);
+        this.pad_pull_range_post(ts, &p, &b, FlowReturn::from_glib(r))
+    };
+    PadPullRangePre("pad-pull-range-pre") = |this, ts, p: *mut ffi::GstPad, o: u64, s: libc::c_uint| {
+        let p = Pad::from_glib_borrow(p);
+        this.pad_pull_range_pre(ts, &p, o, s as u32)
+    };
+    PadPushEventPost("pad-push-event-post") = |this, ts, p: *mut ffi::GstPad, r: glib::ffi::gboolean| {
+        let p = Pad::from_glib_borrow(p);
+        this.pad_push_event_post(ts, &p, bool::from_glib(r))
+    };
+    PadPushEventPre("pad-push-event-pre") = |this, ts, p: *mut ffi::GstPad, e: *mut ffi::GstEvent| {
+        let p = Pad::from_glib_borrow(p);
+        let e = Event::from_glib_borrow(e);
+        this.pad_push_event_pre(ts, &p, &e)
+    };
+    PadPushListPost("pad-push-list-post") = |this, ts, p: *mut ffi::GstPad, r: ffi::GstFlowReturn| {
+        let p = Pad::from_glib_borrow(p);
+        this.pad_push_list_post(ts, &p, FlowReturn::from_glib(r))
+    };
+    PadPushListPre("pad-push-list-pre") = |this, ts, p: *mut ffi::GstPad, bl: *mut ffi::GstBufferList| {
+        let p = Pad::from_glib_borrow(p);
+        let bl = BufferList::from_glib_borrow(bl);
+        this.pad_push_list_pre(ts, &p, &bl)
+    };
+    PadPushPost("pad-push-post") = |this, ts, p: *mut ffi::GstPad, r: ffi::GstFlowReturn| {
+        let p = Pad::from_glib_borrow(p);
+        this.pad_push_post(ts, &p, FlowReturn::from_glib(r))
+    };
+    PadPushPre("pad-push-pre") = |this, ts, p: *mut ffi::GstPad, b: *mut ffi::GstBuffer| {
+        let p = Pad::from_glib_borrow(p);
+        let b = Buffer::from_glib_borrow(b);
+        this.pad_push_pre(ts, &p, &b)
+    };
+    PadQueryPost("pad-query-post") = |this, ts, p: *mut ffi::GstPad, q: *mut ffi::GstQuery, r: glib::ffi::gboolean| {
+        let p = Pad::from_glib_borrow(p);
+        let q = Query::from_glib_borrow(q);
+        this.pad_query_post(ts, &p, &q, bool::from_glib(r))
+    };
+    PadQueryPre("pad-query-pre") = |this, ts, p: *mut ffi::GstPad, q: *mut ffi::GstQuery| {
+        let p = Pad::from_glib_borrow(p);
+        let q = Query::from_glib_borrow(q);
+        this.pad_query_pre(ts, &p, &q)
+    };
+    PadUnlinkPost("pad-unlink-post") = |this, ts, src: *mut ffi::GstPad, sink: *mut ffi::GstPad, r: glib::ffi::gboolean| {
+        let src = Pad::from_glib_borrow(src);
+        let sink = Pad::from_glib_borrow(sink);
+        this.pad_unlink_post(ts, &src, &sink, bool::from_glib(r))
+    };
+    PadUnlinkPre("pad-unlink-pre") = |this, ts, src: *mut ffi::GstPad, sink: *mut ffi::GstPad| {
+        let src = Pad::from_glib_borrow(src);
+        let sink = Pad::from_glib_borrow(sink);
+        this.pad_unlink_pre(ts, &src, &sink)
+    };
+}

gstreamer/src/tracer.rs

@@ -0,0 +1,25 @@
+// Take a look at the license at the top of the repository in the LICENSE file.
+
+use crate::{Plugin, Tracer};
+use glib::translate::*;
+
+impl Tracer {
+    #[doc(alias = "gst_tracer_register")]
+    pub fn register(
+        plugin: Option<&Plugin>,
+        name: &str,
+        type_: glib::types::Type,
+    ) -> Result<(), glib::error::BoolError> {
+        assert_initialized_main_thread!();
+        unsafe {
+            glib::result_from_gboolean!(
+                ffi::gst_tracer_register(
+                    plugin.to_glib_none().0,
+                    name.to_glib_none().0,
+                    type_.into_glib()
+                ),
+                "Failed to register tracer factory"
+            )
+        }
+    }
+}

gstreamer/sys/Gir.toml

@@ -259,13 +259,6 @@ status = "generate"
     name = "take"
     version = "1.18.3"
 
-[[object]]
-name = "Gst.Tracer"
-status = "generate"
-    [[object.function]]
-    name = "register"
-    version = "1.18"
-
 [[object]]
 name = "Gst.Uri"
 status = "generate"

gstreamer/sys/src/lib.rs

@@ -8542,8 +8542,6 @@ extern "C" {
     // GstTracer
     //=========================================================================
     pub fn gst_tracer_get_type() -> GType;
-    #[cfg(any(feature = "v1_18", feature = "dox"))]
-    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
     pub fn gst_tracer_register(
         plugin: *mut GstPlugin,
         name: *const c_char,