rework subscription

Rework subscription so that we can use it for client and server.

Move source and source-output to client to allow client provided
sources. Still needs some work but registration seems to work partly.

Rework DBUS API: move CreateSourceOutput to Client1 interface, remove
Add/RemoveProvider and Device1 interface. Rework SourceOutput1 to
allow for reconfigure.

Add a client to test v4l2 source.

src/tests/test-subscribe.c

@@ -46,9 +46,16 @@ on_state_notify (GObject    *gobject,
       g_main_loop_quit (loop);
       break;
     case PV_CONTEXT_STATE_READY:
-      g_object_set (c, "subscription-mask", PV_SUBSCRIPTION_FLAGS_ALL, NULL);
-      g_signal_connect (c, "subscription-event", (GCallback) subscription_cb, NULL);
+    {
+      PvSubscribe *subscribe;
+
+      subscribe = pv_subscribe_new ();
+      g_object_set (subscribe, "subscription-mask", PV_SUBSCRIPTION_FLAGS_ALL, NULL);
+      g_signal_connect (subscribe, "subscription-event", (GCallback) subscription_cb, NULL);
+      pv_context_set_subscribe (c, subscribe);
       break;
+    }
+
     default:
       break;
   }

src/tests/test-v4l2.c

@@ -0,0 +1,75 @@
+/* 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.
+ */
+
+#include <gst/gst.h>
+#include <gio/gio.h>
+
+#include <client/pulsevideo.h>
+
+#include <modules/v4l2/pv-v4l2-source.h>
+
+static GMainLoop *loop;
+
+static void
+on_state_notify (GObject    *gobject,
+                 GParamSpec *pspec,
+                 gpointer    user_data)
+{
+  PvContextState state;
+  PvContext *c = user_data;
+
+  g_object_get (gobject, "state", &state, NULL);
+  g_print ("got context state %d\n", state);
+
+  switch (state) {
+    case PV_CONTEXT_STATE_ERROR:
+      g_main_loop_quit (loop);
+      break;
+    case PV_CONTEXT_STATE_READY:
+    {
+      PvSource *source;
+
+      source = pv_v4l2_source_new ();
+      pv_context_register_source (c, source);
+      break;
+    }
+    default:
+      break;
+  }
+}
+
+gint
+main (gint argc, gchar *argv[])
+{
+  PvContext *c;
+
+  pv_init (&argc, &argv);
+
+  loop = g_main_loop_new (NULL, FALSE);
+
+  c = pv_context_new ("test-client", NULL);
+  g_signal_connect (c, "notify::state", (GCallback) on_state_notify, c);
+  pv_context_connect(c, PV_CONTEXT_FLAGS_NONE);
+
+  g_main_loop_run (loop);
+
+  g_object_unref (c);
+
+  return 0;
+}