misc hacking

Add introspect API
Move private things to private.h
Use custom main-context for the context, and ensure everything is called
from the custom main-context. does not work well with glib proxy signals
yet.
Work with custom mainloop in the gstreamer element.

src/client/pv-private.h

@@ -0,0 +1,48 @@
+/* Pulsevideo
+ * Copyright (C) 2015 Wim Taymans <wim.taymans@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+struct _PvContextPrivate
+{
+  GMainContext *context;
+
+  gchar *name;
+  GVariant *properties;
+
+  guint id;
+  GDBusConnection *connection;
+
+  PvContextFlags flags;
+  PvContextState state;
+
+  PvDaemon1 *daemon;
+
+  PvClient1 *client;
+
+  PvSubscriptionFlags subscription_mask;
+  PvSubscribe *subscribe;
+
+  GList *sources;
+
+  GDBusObjectManagerServer *server_manager;
+
+  GError *error;
+};
+
+GDBusProxy *      pv_context_find_source           (PvContext *context, const gchar *name, GVariant *props);
+