From eda353933064e24b60888ad5e7c780a80f36bcad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Wed, 25 Sep 2019 16:11:54 +0300
Subject: [PATCH] gstreamer: Add support for implementing gst::Preset interface

---
 gstreamer/src/subclass/mod.rs    |  2 ++
 gstreamer/src/subclass/preset.rs | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 gstreamer/src/subclass/preset.rs

diff --git a/gstreamer/src/subclass/mod.rs b/gstreamer/src/subclass/mod.rs
index 4858f8cb1..15ad2b5fa 100644
--- a/gstreamer/src/subclass/mod.rs
+++ b/gstreamer/src/subclass/mod.rs
@@ -31,6 +31,7 @@ pub mod pipeline;
 pub mod device;
 pub mod device_provider;
 
+pub mod preset;
 pub mod uri_handler;
 
 pub mod prelude {
@@ -44,6 +45,7 @@ pub mod prelude {
     pub use super::ghost_pad::GhostPadImpl;
     pub use super::pad::{PadImpl, PadImplExt};
     pub use super::pipeline::PipelineImpl;
+    pub use super::preset::PresetImpl;
     pub use super::uri_handler::URIHandlerImpl;
     pub use super::PanicPoison;
     pub use glib::subclass::prelude::*;
diff --git a/gstreamer/src/subclass/preset.rs b/gstreamer/src/subclass/preset.rs
new file mode 100644
index 000000000..ba54aea3f
--- /dev/null
+++ b/gstreamer/src/subclass/preset.rs
@@ -0,0 +1,23 @@
+// Copyright (C) 2019 Sebastian Dröge <sebastian@centricular.com>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use glib_sys;
+
+use glib::subclass::prelude::*;
+
+use Preset;
+
+pub trait PresetImpl: super::element::ElementImpl + Send + Sync + 'static {}
+
+unsafe impl<T: ObjectSubclass + PresetImpl> IsImplementable<T> for Preset {
+    unsafe extern "C" fn interface_init(
+        _iface: glib_sys::gpointer,
+        _iface_data: glib_sys::gpointer,
+    ) {
+    }
+}