osxvideosink: Disable hack for NSApp iteration with a special #define

The hack causes deadlocks and other interesting problems and it really
can only be fixed properly inside GLib. We will include a patch for
GLib in our builds for now that handles this, and hopefully at some
point GLib will also merge a proper solution.

A proper solution would first require to refactor the polling in
GMainContext to only provide a single fd, e.g. via epoll/kqueue
or a thread like the one added by our patch. Then this single
fd could be retrieved from the GMainContext and directly integrated
into a NSRunLoop.

https://bugzilla.gnome.org/show_bug.cgi?id=741450
https://bugzilla.gnome.org/show_bug.cgi?id=704374

sys/osxvideo/cocoawindow.h

@@ -70,7 +70,9 @@ struct _GstOSXImage;
 - (void) addToSuperview: (NSView *)superview;
 - (void) removeFromSuperview: (id)unused;
 - (void) setNavigation: (GstNavigation *) nav;
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
 - (void) setMainThread: (NSThread *) thread;
+#endif
 
 @end
 

sys/osxvideo/cocoawindow.m

@@ -648,9 +648,11 @@ const gchar* gst_keycode_to_keyname(gint16 keycode)
   [self reshape];
 }
 
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
 - (void) setMainThread: (NSThread *) thread {
   mainThread = thread;
 }
+#endif
 
 - (void) haveSuperviewReal:(NSMutableArray *)closure {
 	BOOL haveSuperview = [self superview] != nil;

sys/osxvideo/osxvideosink.h

@@ -130,8 +130,10 @@ GType gst_osx_video_sink_get_type(void);
 -(void) showFrame: (GstBufferObject*) buf;
 -(void) setView: (NSView*) view;
 + (BOOL) isMainThread;
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
 -(void) nsAppThread;
 -(void) checkMainRunLoop;
+#endif
 @end
 
 G_END_DECLS

sys/osxvideo/osxvideosink.m

@@ -43,11 +43,11 @@
 GST_DEBUG_CATEGORY (gst_debug_osx_video_sink);
 #define GST_CAT_DEFAULT gst_debug_osx_video_sink
 
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
 #include <pthread.h>
 extern void _CFRunLoopSetCurrent (CFRunLoopRef rl);
 extern pthread_t _CFMainPThread;
-
-
+#endif
 
 static GstStaticPadTemplate gst_osx_video_sink_sink_template_factory =
 GST_STATIC_PAD_TEMPLATE ("sink",
@@ -72,9 +72,13 @@ enum
 };
 
 static void gst_osx_video_sink_osxwindow_destroy (GstOSXVideoSink * osxvideosink);
+
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
 static GMutex _run_loop_check_mutex;
 static GMutex _run_loop_mutex;
 static GCond _run_loop_cond;
+#endif
+
 static GstOSXVideoSinkClass *sink_class = NULL;
 static GstVideoSinkClass *parent_class = NULL;
 
@@ -98,6 +102,7 @@ gst_osx_video_sink_call_from_main_thread(GstOSXVideoSink *osxvideosink,
   [pool release];
 }
 
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
 /* Poll for cocoa events */
 static void
 run_ns_app_loop (void) {
@@ -215,6 +220,7 @@ static void
 gst_osx_video_sink_stop_cocoa_loop (GstOSXVideoSink * osxvideosink)
 {
 }
+#endif
 
 /* This function handles osx window creation */
 static gboolean
@@ -245,9 +251,10 @@ gst_osx_video_sink_osxwindow_create (GstOSXVideoSink * osxvideosink, gint width,
   rect.size.height = (float) osxwindow->height;
   osxwindow->gstview =[[GstGLView alloc] initWithFrame:rect];
 
-
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
   gst_osx_video_sink_run_cocoa_loop (osxvideosink);
   [osxwindow->gstview setMainThread:sink_class->ns_app_thread];
+#endif
 
   if (osxvideosink->superview == NULL) {
     GST_INFO_OBJECT (osxvideosink, "emitting prepare-xwindow-id");
@@ -290,7 +297,9 @@ gst_osx_video_sink_osxwindow_destroy (GstOSXVideoSink * osxvideosink)
       osxvideosink->osxvideosinkobject,
       @selector(destroy), (id) nil, YES);
   GST_OBJECT_UNLOCK (osxvideosink);
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
   gst_osx_video_sink_stop_cocoa_loop (osxvideosink);
+#endif
   [pool release];
 }
 
@@ -764,6 +773,8 @@ gst_osx_video_sink_get_type (void)
   NSRect rect;
   unsigned int mask;
 
+  [NSApplication sharedApplication];
+
   osxwindow->internal = TRUE;
 
   mask =  NSTitledWindowMask             |
@@ -929,6 +940,7 @@ no_texture_buffer:
   [pool release];
 }
 
+#ifndef GSTREAMER_GLIB_COCOA_NSAPPLICATION
 -(void) nsAppThread
 {
   NSAutoreleasePool *pool;
@@ -965,6 +977,7 @@ no_texture_buffer:
   g_cond_signal (&_run_loop_cond);
   g_mutex_unlock (&_run_loop_mutex);
 }
+#endif
 
 @end