1 /* GStreamer Navigation
2 * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
3 * Copyright (C) 2003 David A. Schleef <ds@schleef.org>
5 * navigation.h: navigation interface design
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
23 #ifndef __GST_NAVIGATION_H__
24 #define __GST_NAVIGATION_H__
30 #define GST_TYPE_NAVIGATION \
31 (gst_navigation_get_type ())
32 #define GST_NAVIGATION(obj) \
33 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_NAVIGATION, GstNavigation))
34 #define GST_IS_NAVIGATION(obj) \
35 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_NAVIGATION))
36 #define GST_NAVIGATION_GET_IFACE(obj) \
37 (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GST_TYPE_NAVIGATION, GstNavigationInterface))
39 typedef struct _GstNavigation GstNavigation;
40 typedef struct _GstNavigationInterface GstNavigationInterface;
42 struct _GstNavigationInterface {
43 GTypeInterface g_iface;
45 /* virtual functions */
46 void (*send_event) (GstNavigation *navigation, GstStructure *structure);
48 gpointer _gst_reserved[GST_PADDING];
51 GType gst_navigation_get_type (void);
53 /* Navigation commands */
56 * GstNavigationCommand:
57 * @GST_NAVIGATION_COMMAND_INVALID: An invalid command entry
58 * @GST_NAVIGATION_COMMAND_MENU1: Execute navigation menu command 1. For DVD,
59 * this enters the DVD root menu, or exits back to the title from the menu.
60 * @GST_NAVIGATION_COMMAND_MENU2: Execute navigation menu command 2. For DVD,
61 * this jumps to the DVD title menu.
62 * @GST_NAVIGATION_COMMAND_MENU3: Execute navigation menu command 3. For DVD,
63 * this jumps into the DVD root menu.
64 * @GST_NAVIGATION_COMMAND_MENU4: Execute navigation menu command 4. For DVD,
65 * this jumps to the Subpicture menu.
66 * @GST_NAVIGATION_COMMAND_MENU5: Execute navigation menu command 5. For DVD,
67 * the jumps to the audio menu.
68 * @GST_NAVIGATION_COMMAND_MENU6: Execute navigation menu command 6. For DVD,
69 * this jumps to the angles menu.
70 * @GST_NAVIGATION_COMMAND_MENU7: Execute navigation menu command 7. For DVD,
71 * this jumps to the chapter menu.
72 * @GST_NAVIGATION_COMMAND_LEFT: Select the next button to the left in a menu,
73 * if such a button exists.
74 * @GST_NAVIGATION_COMMAND_RIGHT: Select the next button to the right in a menu,
75 * if such a button exists.
76 * @GST_NAVIGATION_COMMAND_UP: Select the button above the current one in a
77 * menu, if such a button exists.
78 * @GST_NAVIGATION_COMMAND_DOWN: Select the button below the current one in a
79 * menu, if such a button exists.
80 * @GST_NAVIGATION_COMMAND_ACTIVATE: Activate (click) the currently selected
81 * button in a menu, if such a button exists.
82 * @GST_NAVIGATION_COMMAND_PREV_ANGLE: Switch to the previous angle in a
84 * @GST_NAVIGATION_COMMAND_NEXT_ANGLE: Switch to the next angle in a multiangle
87 * A set of commands that may be issued to an element providing the
88 * #GstNavigation interface. The available commands can be queried via
89 * the gst_navigation_query_new_commands() query.
91 * For convenience in handling DVD navigation, the MENU commands are aliased as:
92 * GST_NAVIGATION_COMMAND_DVD_MENU = @GST_NAVIGATION_COMMAND_MENU1
93 * GST_NAVIGATION_COMMAND_DVD_TITLE_MENU = @GST_NAVIGATION_COMMAND_MENU2
94 * GST_NAVIGATION_COMMAND_DVD_ROOT_MENU = @GST_NAVIGATION_COMMAND_MENU3
95 * GST_NAVIGATION_COMMAND_DVD_SUBPICTURE_MENU = @GST_NAVIGATION_COMMAND_MENU4
96 * GST_NAVIGATION_COMMAND_DVD_AUDIO_MENU = @GST_NAVIGATION_COMMAND_MENU5
97 * GST_NAVIGATION_COMMAND_DVD_ANGLE_MENU = @GST_NAVIGATION_COMMAND_MENU6
98 * GST_NAVIGATION_COMMAND_DVD_CHAPTER_MENU = @GST_NAVIGATION_COMMAND_MENU7
103 GST_NAVIGATION_COMMAND_INVALID = 0,
105 GST_NAVIGATION_COMMAND_MENU1 = 1,
106 GST_NAVIGATION_COMMAND_MENU2 = 2,
107 GST_NAVIGATION_COMMAND_MENU3 = 3,
108 GST_NAVIGATION_COMMAND_MENU4 = 4,
109 GST_NAVIGATION_COMMAND_MENU5 = 5,
110 GST_NAVIGATION_COMMAND_MENU6 = 6,
111 GST_NAVIGATION_COMMAND_MENU7 = 7,
113 GST_NAVIGATION_COMMAND_LEFT = 20,
114 GST_NAVIGATION_COMMAND_RIGHT = 21,
115 GST_NAVIGATION_COMMAND_UP = 22,
116 GST_NAVIGATION_COMMAND_DOWN = 23,
117 GST_NAVIGATION_COMMAND_ACTIVATE = 24,
119 GST_NAVIGATION_COMMAND_PREV_ANGLE = 30,
120 GST_NAVIGATION_COMMAND_NEXT_ANGLE = 31
121 } GstNavigationCommand;
123 /* Some aliases for the menu command types */
124 #define GST_NAVIGATION_COMMAND_DVD_MENU GST_NAVIGATION_COMMAND_MENU1
125 #define GST_NAVIGATION_COMMAND_DVD_TITLE_MENU GST_NAVIGATION_COMMAND_MENU2
126 #define GST_NAVIGATION_COMMAND_DVD_ROOT_MENU GST_NAVIGATION_COMMAND_MENU3
127 #define GST_NAVIGATION_COMMAND_DVD_SUBPICTURE_MENU GST_NAVIGATION_COMMAND_MENU4
128 #define GST_NAVIGATION_COMMAND_DVD_AUDIO_MENU GST_NAVIGATION_COMMAND_MENU5
129 #define GST_NAVIGATION_COMMAND_DVD_ANGLE_MENU GST_NAVIGATION_COMMAND_MENU6
130 #define GST_NAVIGATION_COMMAND_DVD_CHAPTER_MENU GST_NAVIGATION_COMMAND_MENU7
135 GST_NAVIGATION_QUERY_INVALID = 0,
136 GST_NAVIGATION_QUERY_COMMANDS = 1,
137 GST_NAVIGATION_QUERY_ANGLES = 2
138 } GstNavigationQueryType;
140 GstNavigationQueryType gst_navigation_query_get_type (GstQuery *query);
142 GstQuery *gst_navigation_query_new_commands (void);
143 void gst_navigation_query_set_commands (GstQuery *query, gint n_cmds, ...);
144 void gst_navigation_query_set_commandsv (GstQuery *query, gint n_cmds,
145 GstNavigationCommand *cmds);
146 gboolean gst_navigation_query_parse_commands_length (GstQuery *query,
148 gboolean gst_navigation_query_parse_commands_nth (GstQuery *query, guint nth,
149 GstNavigationCommand *cmd);
151 GstQuery *gst_navigation_query_new_angles (void);
152 void gst_navigation_query_set_angles (GstQuery *query, guint cur_angle,
154 gboolean gst_navigation_query_parse_angles (GstQuery *query, guint *cur_angle,
157 /* Element messages */
159 * GstNavigationMessageType:
160 * @GST_NAVIGATION_MESSAGE_INVALID: Returned from
161 * gst_navigation_message_get_type() when the passed message is not a
162 * navigation message.
163 * @GST_NAVIGATION_MESSAGE_MOUSE_OVER: Sent when the mouse moves over or leaves a
164 * clickable region of the output, such as a DVD menu button.
165 * @GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED: Sent when the set of available commands
166 * changes and should re-queried by interested applications.
167 * @GST_NAVIGATION_MESSAGE_ANGLES_CHANGED: Sent when display angles in a multi-angle
168 * feature (such as a multiangle DVD) change - either angles have appeared or
171 * A set of notifications that may be received on the bus when navigation
172 * related status changes.
177 GST_NAVIGATION_MESSAGE_INVALID,
178 GST_NAVIGATION_MESSAGE_MOUSE_OVER,
179 GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED,
180 GST_NAVIGATION_MESSAGE_ANGLES_CHANGED
181 } GstNavigationMessageType;
183 GstNavigationMessageType gst_navigation_message_get_type (GstMessage *message);
185 GstMessage *gst_navigation_message_new_mouse_over (GstObject *src,
187 gboolean gst_navigation_message_parse_mouse_over (GstMessage *message,
190 GstMessage *gst_navigation_message_new_commands_changed (GstObject *src);
192 GstMessage *gst_navigation_message_new_angles_changed (GstObject *src,
195 gboolean gst_navigation_message_parse_angles_changed (GstMessage *message,
199 /* event parsing functions */
201 * GstNavigationEventType:
202 * @GST_NAVIGATION_EVENT_INVALID: Returned from
203 * gst_navigation_event_get_type() when the passed event is not a navigation event.
204 * @GST_NAVIGATION_EVENT_KEY_PRESS: A key press event. Use
205 * gst_navigation_event_parse_key_event() to extract the details from the event.
206 * @GST_NAVIGATION_EVENT_KEY_RELEASE: A key release event. Use
207 * gst_navigation_event_parse_key_event() to extract the details from the event.
208 * @GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS: A mouse button press event. Use
209 * gst_navigation_event_parse_mouse_button_event() to extract the details from the
211 * @GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE: A mouse button release event. Use
212 * gst_navigation_event_parse_mouse_button_event() to extract the details from the
214 * @GST_NAVIGATION_EVENT_MOUSE_MOVE: A mouse movement event. Use
215 * gst_navigation_event_parse_mouse_move_event() to extract the details from the
217 * @GST_NAVIGATION_EVENT_COMMAND: A navigation command event. Use
218 * gst_navigation_event_parse_command() to extract the details from the event.
220 * Enum values for the various events that an element implementing the
221 * GstNavigation interface might send up the pipeline.
226 GST_NAVIGATION_EVENT_INVALID = 0,
227 GST_NAVIGATION_EVENT_KEY_PRESS = 1,
228 GST_NAVIGATION_EVENT_KEY_RELEASE = 2,
229 GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS = 3,
230 GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE = 4,
231 GST_NAVIGATION_EVENT_MOUSE_MOVE = 5,
232 GST_NAVIGATION_EVENT_COMMAND = 6
233 } GstNavigationEventType;
235 GstNavigationEventType gst_navigation_event_get_type (GstEvent *event);
236 gboolean gst_navigation_event_parse_key_event (GstEvent *event,
238 gboolean gst_navigation_event_parse_mouse_button_event (GstEvent *event,
239 gint *button, gdouble *x, gdouble *y);
240 gboolean gst_navigation_event_parse_mouse_move_event (GstEvent *event,
241 gdouble *x, gdouble *y);
242 gboolean gst_navigation_event_parse_command (GstEvent *event,
243 GstNavigationCommand *command);
245 /* interface virtual function wrappers */
246 void gst_navigation_send_event (GstNavigation *navigation,
247 GstStructure *structure);
248 void gst_navigation_send_key_event (GstNavigation *navigation,
249 const char *event, const char *key);
250 void gst_navigation_send_mouse_event (GstNavigation *navigation,
251 const char *event, int button, double x, double y);
252 void gst_navigation_send_command (GstNavigation *navigation,
253 GstNavigationCommand command);
257 #endif /* __GST_NAVIGATION_H__ */