From 2452f7f6a922f8fde4490d250eb195063e809067 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Thu, 10 Aug 2017 01:13:28 +0300
Subject: [PATCH] Allow usage of Structures in GValues

---
 gstreamer/src/structure.rs | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/gstreamer/src/structure.rs b/gstreamer/src/structure.rs
index 83612c7a9..8c6f3b502 100644
--- a/gstreamer/src/structure.rs
+++ b/gstreamer/src/structure.rs
@@ -18,10 +18,12 @@ use std::marker::PhantomData;
 use Fraction;
 
 use glib;
-use glib::translate::{from_glib, from_glib_full, FromGlibPtrFull, FromGlibPtrNone, Stash,
-                      StashMut, ToGlib, ToGlibPtr, ToGlibPtrMut};
+use glib::translate::{from_glib, from_glib_full, from_glib_none, FromGlibPtrFull, FromGlibPtrNone,
+                      GlibPtrDefault, Stash, StashMut, ToGlib, ToGlibPtr, ToGlibPtrMut};
 use glib::value::{FromValueOptional, ToValue, Value};
 use ffi;
+use glib_ffi::gpointer;
+use gobject_ffi;
 
 pub struct Structure(*mut StructureRef, PhantomData<StructureRef>);
 
@@ -225,6 +227,23 @@ impl FromGlibPtrFull<*mut ffi::GstStructure> for Structure {
     }
 }
 
+impl<'a> glib::value::FromValueOptional<'a> for Structure {
+    unsafe fn from_value_optional(v: &'a glib::Value) -> Option<Self> {
+        let ptr = gobject_ffi::g_value_get_boxed(v.to_glib_none().0);
+        from_glib_none(ptr as *const ffi::GstStructure)
+    }
+}
+
+impl glib::value::SetValue for Structure {
+    unsafe fn set_value(v: &mut glib::Value, s: &Self) {
+        gobject_ffi::g_value_set_boxed(v.to_glib_none_mut().0, s.0 as gpointer);
+    }
+}
+
+impl GlibPtrDefault for Structure {
+    type GlibType = *mut ffi::GstStructure;
+}
+
 #[repr(C)]
 pub struct StructureRef(ffi::GstStructure);