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diff --git a/lib/libdvben50221/en50221_app_ai.h b/lib/libdvben50221/en50221_app_ai.h
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+/*
+    en50221 encoder An implementation for libdvb
+    an implementation for the en50221 transport layer
+
+    Copyright (C) 2004, 2005 Manu Abraham <abraham.manu@gmail.com>
+    Copyright (C) 2005 Julian Scheel (julian at jusst dot de)
+    Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net)
+
+    This library is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as
+    published by the Free Software Foundation; either version 2.1 of
+    the License, or (at your option) any later version.
+
+    This program 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+*/
+
+#ifndef __EN50221_APPLICATION_AI_H__
+#define __EN50221_APPLICATION_AI_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <libdvben50221/en50221_app_utils.h>
+
+#define EN50221_APP_AI_RESOURCEID MKRID(2,1,1)
+
+#define APPLICATION_TYPE_CA 0x01
+#define APPLICATION_TYPE_EPG 0x02
+
+/**
+ * Type definition for application callback function - called when we receive
+ * an application info object.
+ *
+ * @param arg Private argument.
+ * @param slot_id Slot id concerned.
+ * @param session_number Resource id concerned.
+ * @param application_type Type of application.
+ * @param application_manufacturer Manufacturer of application.
+ * @param manufacturer_code Manufacturer specific code.
+ * @param menu_string_length Length of menu string.
+ * @param menu_string The menu string itself.
+ * @return 0 on success, -1 on failure.
+ */
+typedef int (*en50221_app_ai_callback) (void *arg,
+					uint8_t slot_id,
+					uint16_t session_number,
+					uint8_t application_type,
+					uint16_t application_manufacturer,
+					uint16_t manufacturer_code,
+					uint8_t menu_string_length,
+					uint8_t * menu_string);
+
+/**
+ * Opaque type representing an application information resource.
+ */
+struct en50221_app_ai;
+
+/**
+ * Create an instance of an application information resource.
+ *
+ * @param funcs Send functions to use.
+ * @return Instance, or NULL on failure.
+ */
+extern struct en50221_app_ai *en50221_app_ai_create(struct en50221_app_send_functions *funcs);
+
+/**
+ * Destroy an instance of an application information resource.
+ *
+ * @param ai Instance to destroy.
+ */
+extern void en50221_app_ai_destroy(struct en50221_app_ai *ai);
+
+/**
+ * Register a callback for reception of application_info objects.
+ *
+ * @param ai Application information instance.
+ * @param callback Callback function.
+ * @param arg Private argument passed during calls to the callback.
+ */
+extern void en50221_app_ai_register_callback(struct en50221_app_ai *ai,
+					     en50221_app_ai_callback,
+					     void *arg);
+
+/**
+ * send a enquiry for the app_info provided by a module
+ *
+ * @param ai Application information instance.
+ * @param session_number Session to send on.
+ * @return 0 on success, -1 on failure.
+ */
+extern int en50221_app_ai_enquiry(struct en50221_app_ai *ai,
+				  uint16_t session_number);
+
+/**
+ * send a enter_menu tag, this will make the application
+ * open a new MMI session to provide a Menu, or so.
+ *
+ * @param ai Application information instance.
+ * @param session_number Session to send on.
+ * @return 0 on success, -1 on failure.
+ */
+extern int en50221_app_ai_entermenu(struct en50221_app_ai *ai,
+				    uint16_t session_number);
+
+/**
+ * Pass data received for this resource into it for parsing.
+ *
+ * @param ai Application information instance.
+ * @param slot_id Slot ID concerned.
+ * @param session_number Session number concerned.
+ * @param resource_id Resource ID concerned.
+ * @param data The data.
+ * @param data_length Length of data in bytes.
+ * @return 0 on success, -1 on failure.
+ */
+extern int en50221_app_ai_message(struct en50221_app_ai *ai,
+				  uint8_t slot_id,
+				  uint16_t session_number,
+				  uint32_t resource_id,
+				  uint8_t *data,
+				  uint32_t data_length);
+
+#ifdef __cplusplus
+}
+#endif
+#endif