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Port Pad subclassing
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commit
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6 changed files with 119 additions and 2 deletions
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@ -577,6 +577,7 @@ trait_name = "GstObjectExt"
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[[object]]
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name = "Gst.Pad"
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subclassing = true
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status = "generate"
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[[object.function]]
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name = "link_maybe_ghosting"
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@ -8,6 +8,7 @@ use Event;
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use EventType;
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use FlowReturn;
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use Object;
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use PadClass;
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use PadDirection;
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use PadLinkCheck;
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use PadLinkReturn;
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@ -34,7 +35,7 @@ use std::mem::transmute;
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use std::ptr;
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glib_wrapper! {
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pub struct Pad(Object<ffi::GstPad, ffi::GstPadClass>): Object;
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pub struct Pad(Object<ffi::GstPad, ffi::GstPadClass, PadClass>): Object;
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match fn {
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get_type => || ffi::gst_pad_get_type(),
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@ -184,6 +184,7 @@ mod gobject;
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mod iterator;
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mod object;
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mod pad;
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pub use pad::PadClass;
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mod parse_context;
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mod proxy_pad;
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mod tag_setter;
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@ -26,6 +26,7 @@ use StaticPadTemplate;
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use std::cell::RefCell;
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use std::mem;
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use std::mem::transmute;
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use std::ops;
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use std::ptr;
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use glib;
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@ -34,7 +35,7 @@ use glib::translate::{
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ToGlibPtr,
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};
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use glib::Object;
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use glib::{IsA, StaticType};
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use glib::{IsA, IsClassFor, StaticType};
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use glib_ffi;
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use glib_ffi::gpointer;
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@ -912,6 +913,30 @@ impl<O: IsA<Pad>> PadExtManual for O {
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}
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}
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#[repr(C)]
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pub struct PadClass(ffi::GstPadClass);
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unsafe impl IsClassFor for PadClass {
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type Instance = Pad;
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}
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unsafe impl Send for PadClass {}
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unsafe impl Sync for PadClass {}
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impl ops::Deref for PadClass {
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type Target = glib::ObjectClass;
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fn deref(&self) -> &Self::Target {
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self.upcast_ref()
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}
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}
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impl ops::DerefMut for PadClass {
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fn deref_mut(&mut self) -> &mut Self::Target {
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self.upcast_ref_mut()
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}
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}
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unsafe extern "C" fn trampoline_pad_probe(
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pad: *mut ffi::GstPad,
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info: *mut ffi::GstPadProbeInfo,
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@ -16,6 +16,7 @@ pub mod plugin;
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pub mod bin;
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pub mod child_proxy;
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pub mod element;
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pub mod pad;
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pub mod pipeline;
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pub mod uri_handler;
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@ -23,6 +24,7 @@ pub mod prelude {
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pub use super::bin::BinImpl;
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pub use super::child_proxy::ChildProxyImpl;
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pub use super::element::{ElementClassSubclassExt, ElementImpl, ElementImplExt};
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pub use super::pad::PadImpl;
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pub use super::pipeline::PipelineImpl;
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pub use super::uri_handler::URIHandlerImpl;
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pub use super::PanicPoison;
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87
gstreamer/src/subclass/pad.rs
Normal file
87
gstreamer/src/subclass/pad.rs
Normal file
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@ -0,0 +1,87 @@
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// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use ffi;
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use glib;
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use glib::translate::*;
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use glib::subclass::prelude::*;
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use Pad;
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use PadClass;
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pub trait PadImpl: ObjectImpl + Send + Sync + 'static {
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fn linked(&self, pad: &Pad, peer: &Pad) {
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self.parent_linked(pad, peer)
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}
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fn unlinked(&self, pad: &Pad, peer: &Pad) {
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self.parent_unlinked(pad, peer)
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}
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fn parent_linked(&self, pad: &Pad, peer: &Pad) {
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unsafe {
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let data = self.get_type_data();
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let parent_class = data.as_ref().get_parent_class() as *mut ffi::GstPadClass;
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(*parent_class)
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.linked
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.map(|f| f(pad.to_glib_none().0, peer.to_glib_none().0))
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.unwrap_or(())
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}
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}
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fn parent_unlinked(&self, pad: &Pad, peer: &Pad) {
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unsafe {
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let data = self.get_type_data();
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let parent_class = data.as_ref().get_parent_class() as *mut ffi::GstPadClass;
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(*parent_class)
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.unlinked
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.map(|f| f(pad.to_glib_none().0, peer.to_glib_none().0))
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.unwrap_or(())
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}
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}
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}
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unsafe impl<T: ObjectSubclass + PadImpl> IsSubclassable<T> for PadClass {
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fn override_vfuncs(&mut self) {
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<glib::ObjectClass as IsSubclassable<T>>::override_vfuncs(self);
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unsafe {
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let klass = &mut *(self as *const Self as *mut ffi::GstPadClass);
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klass.linked = Some(pad_linked::<T>);
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klass.unlinked = Some(pad_unlinked::<T>);
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}
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}
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}
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unsafe extern "C" fn pad_linked<T: ObjectSubclass>(ptr: *mut ffi::GstPad, peer: *mut ffi::GstPad)
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where
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T: PadImpl,
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{
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glib_floating_reference_guard!(ptr);
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let instance = &*(ptr as *mut T::Instance);
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let imp = instance.get_impl();
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let wrap: Pad = from_glib_borrow(ptr);
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imp.linked(&wrap, &from_glib_borrow(peer))
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}
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unsafe extern "C" fn pad_unlinked<T: ObjectSubclass>(ptr: *mut ffi::GstPad, peer: *mut ffi::GstPad)
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where
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T: PadImpl,
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{
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glib_floating_reference_guard!(ptr);
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let instance = &*(ptr as *mut T::Instance);
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let imp = instance.get_impl();
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let wrap: Pad = from_glib_borrow(ptr);
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imp.unlinked(&wrap, &from_glib_borrow(peer))
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}
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