[banshee] GStreamerSharp: port to GTK3

[Andrés Aragoneses <aaragoneses src gnome org>]

commit ab940aacb3e2eb53513199dbf8c6052b39dc0413
Author: Stephan Sundermann <stephansundermann gmail com>
Date:   Tue Oct 29 18:33:59 2013 +0100

    GStreamerSharp: port to GTK3
    
    Even though GStreamerSharp backend doesn't strictly depend on GTK at
    compile time, it uses GDK at runtime to get the handle of a Window
    in order to tell GStreamer where to render a video. To do this,
    it uses a P/Invoke to an unmanaged library which was still pointing
    to GTKv2.0 instead of GTKv3.0. This was causing the following errors:
    
    (Nereid:16860): GLib-GObject-WARNING **: cannot register existing type `GdkWindow'
    
    (Nereid:16860): Gdk-WARNING **: /build/buildd/gtk+2.0-2.24.17/gdk/x11/gdkdrawable-x11.c:952 drawable is 
not a pixmap or window
    
    We leave a couple of FIXMEs for Windows/Mac platforms.
    
    Signed-off-by: Andrés G. Aragoneses <knocte gmail com>

 .../Banshee.GStreamerSharp/VideoManager.cs         |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/src/Backends/Banshee.GStreamerSharp/Banshee.GStreamerSharp/VideoManager.cs 
b/src/Backends/Banshee.GStreamerSharp/Banshee.GStreamerSharp/VideoManager.cs
index f9c2678..f0db326 100644
--- a/src/Backends/Banshee.GStreamerSharp/Banshee.GStreamerSharp/VideoManager.cs
+++ b/src/Backends/Banshee.GStreamerSharp/Banshee.GStreamerSharp/VideoManager.cs
@@ -251,7 +251,7 @@ namespace Banshee.GStreamerSharp
         {
             switch (System.Environment.OSVersion.Platform) {
                 case PlatformID.Unix:
-                    video_window_xid = (ulong)gdk_x11_drawable_get_xid (window);
+                    video_window_xid = (ulong)gdk_x11_window_get_xid (window);
                 break;
                 case PlatformID.Win32NT:
                 case PlatformID.Win32S:
@@ -262,8 +262,11 @@ namespace Banshee.GStreamerSharp
             }
         }
 
-        [DllImport ("libgdk-x11-2.0.so.0")]
-        private static extern IntPtr gdk_x11_drawable_get_xid (IntPtr drawable);
+        //FIXME: map this, to allow running in MacOS?
+        [DllImport ("libgdk-3.so.0") /* willfully unmapped */]
+        private static extern IntPtr gdk_x11_window_get_xid (IntPtr drawable);
+
+        //FIXME: find the new 3.0 GDK library name in Windows
         [DllImport ("libgdk-win32-2.0-0.dll")]
         private static extern IntPtr gdk_win32_drawable_get_handle (IntPtr drawable);