From d96999328ad80941fbdb51f64d46fa540463ca62 Mon Sep 17 00:00:00 2001
From: Alexey Chernov <4ernov@gmail.com>
Date: Tue, 21 Jan 2014 09:44:00 +0100
Subject: [PATCH] d3dvideosink: First destroy the window, then unregister the
 class

It's impossible to create another pipeline with d3dvideosink after disposing
the previous one due to some problem in d3dvideosink. The message is: "Unable
to register Direct3D hidden window class".

I've evaluated the problem and it's that UnregisterClass() in working thread is
called before DestroyWindow() and UnregisterClass() does nothing.

https://bugzilla.gnome.org/show_bug.cgi?id=722622
---
 sys/d3dvideosink/d3dhelpers.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sys/d3dvideosink/d3dhelpers.c b/sys/d3dvideosink/d3dhelpers.c
index e405b1c457..d778e3572d 100644
--- a/sys/d3dvideosink/d3dhelpers.c
+++ b/sys/d3dvideosink/d3dhelpers.c
@@ -684,7 +684,8 @@ fallback:
 }
 
 static void
-gst_d3dsurface_buffer_pool_release_buffer (GstBufferPool * bpool, GstBuffer * buffer)
+gst_d3dsurface_buffer_pool_release_buffer (GstBufferPool * bpool,
+    GstBuffer * buffer)
 {
   GstMemory *mem = NULL;
 
@@ -2590,12 +2591,12 @@ d3d_hidden_window_thread (GstD3DVideoSinkClass * klass)
 error:
   if (!ret)
     klass->d3d.error_exit = TRUE;
-  if (reged)
-    UnregisterClass (WndClass.lpszClassName, WndClass.hInstance);
   if (hWnd) {
     DestroyWindow (hWnd);
     klass->d3d.hidden_window = 0;
   }
+  if (reged)
+    UnregisterClass (WndClass.lpszClassName, WndClass.hInstance);
   d3d_class_display_device_destroy (klass);
 
   return ret;