Improve loop callbacks

Pass just one data item to the callbacks.
Add properties to port.
Add user data to link
Handle autolink with multiple ports
More work on jack support

src/modules/module-jack/jack-node.h

@@ -0,0 +1,73 @@
+/* PipeWire
+ * 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.
+ */
+
+#ifndef __PIPEWIRE_JACK_NODE_H__
+#define __PIPEWIRE_JACK_NODE_H__
+
+#include <pipewire/node.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** \class pw_jack_node
+ *
+ * PipeWire jack node interface
+ */
+struct pw_jack_node;
+
+struct pw_jack_node_events {
+#define PW_VERSION_JACK_NODE_EVENTS 0
+        uint32_t version;
+
+        void (*destroy) (void *data);
+
+        void (*process) (void *data);
+};
+
+
+struct pw_jack_node *
+pw_jack_node_new(struct pw_core *core,
+		 struct pw_global *parent,
+		 struct jack_server *server,
+		 int ref_num,
+		 struct pw_properties *properties);
+
+void
+pw_jack_node_destroy(struct pw_jack_node *node);
+
+struct pw_node *pw_jack_node_get_node(struct pw_jack_node *node);
+
+void pw_jack_node_add_listener(struct pw_jack_node *node,
+			       struct spa_hook *listener,
+			       const struct pw_jack_node_events *events,
+			       void *data);
+
+struct pw_port *pw_jack_node_add_port(struct pw_jack_node *node,
+				      enum pw_direction direction,
+				      jack_port_id_t port_id);
+
+struct pw_port *pw_jack_node_find_port(struct pw_jack_node *node,
+				       enum pw_direction direction, jack_port_id_t port_id);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __PIPEWIRE_JACK_NODE_H__ */