/* GStreamer Navigation * Copyright (C) 2003 Ronald Bultje * Copyright (C) 2003 David A. Schleef * * navigation.h: navigation interface design * * 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 __GST_NAVIGATION_H__ #define __GST_NAVIGATION_H__ #include G_BEGIN_DECLS #define GST_TYPE_NAVIGATION \ (gst_navigation_get_type ()) #define GST_NAVIGATION(obj) \ (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_NAVIGATION, GstNavigation)) #define GST_IS_NAVIGATION(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_NAVIGATION)) #define GST_NAVIGATION_GET_INTERFACE(obj) \ (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GST_TYPE_NAVIGATION, GstNavigationInterface)) typedef struct _GstNavigation GstNavigation; typedef struct _GstNavigationInterface GstNavigationInterface; /** * GstNavigationInterface: * @iface: the parent interface * @send_event: sending a navigation event * * Navigation interface. */ struct _GstNavigationInterface { GTypeInterface iface; /* virtual functions */ void (*send_event) (GstNavigation *navigation, GstStructure *structure); }; GType gst_navigation_get_type (void); /* Navigation commands */ /** * GstNavigationCommand: * @GST_NAVIGATION_COMMAND_INVALID: An invalid command entry * @GST_NAVIGATION_COMMAND_MENU1: Execute navigation menu command 1. For DVD, * this enters the DVD root menu, or exits back to the title from the menu. * @GST_NAVIGATION_COMMAND_MENU2: Execute navigation menu command 2. For DVD, * this jumps to the DVD title menu. * @GST_NAVIGATION_COMMAND_MENU3: Execute navigation menu command 3. For DVD, * this jumps into the DVD root menu. * @GST_NAVIGATION_COMMAND_MENU4: Execute navigation menu command 4. For DVD, * this jumps to the Subpicture menu. * @GST_NAVIGATION_COMMAND_MENU5: Execute navigation menu command 5. For DVD, * the jumps to the audio menu. * @GST_NAVIGATION_COMMAND_MENU6: Execute navigation menu command 6. For DVD, * this jumps to the angles menu. * @GST_NAVIGATION_COMMAND_MENU7: Execute navigation menu command 7. For DVD, * this jumps to the chapter menu. * @GST_NAVIGATION_COMMAND_LEFT: Select the next button to the left in a menu, * if such a button exists. * @GST_NAVIGATION_COMMAND_RIGHT: Select the next button to the right in a menu, * if such a button exists. * @GST_NAVIGATION_COMMAND_UP: Select the button above the current one in a * menu, if such a button exists. * @GST_NAVIGATION_COMMAND_DOWN: Select the button below the current one in a * menu, if such a button exists. * @GST_NAVIGATION_COMMAND_ACTIVATE: Activate (click) the currently selected * button in a menu, if such a button exists. * @GST_NAVIGATION_COMMAND_PREV_ANGLE: Switch to the previous angle in a * multiangle feature. * @GST_NAVIGATION_COMMAND_NEXT_ANGLE: Switch to the next angle in a multiangle * feature. * * A set of commands that may be issued to an element providing the * #GstNavigation interface. The available commands can be queried via * the gst_navigation_query_new_commands() query. * * For convenience in handling DVD navigation, the MENU commands are aliased as: * GST_NAVIGATION_COMMAND_DVD_MENU = @GST_NAVIGATION_COMMAND_MENU1 * GST_NAVIGATION_COMMAND_DVD_TITLE_MENU = @GST_NAVIGATION_COMMAND_MENU2 * GST_NAVIGATION_COMMAND_DVD_ROOT_MENU = @GST_NAVIGATION_COMMAND_MENU3 * GST_NAVIGATION_COMMAND_DVD_SUBPICTURE_MENU = @GST_NAVIGATION_COMMAND_MENU4 * GST_NAVIGATION_COMMAND_DVD_AUDIO_MENU = @GST_NAVIGATION_COMMAND_MENU5 * GST_NAVIGATION_COMMAND_DVD_ANGLE_MENU = @GST_NAVIGATION_COMMAND_MENU6 * GST_NAVIGATION_COMMAND_DVD_CHAPTER_MENU = @GST_NAVIGATION_COMMAND_MENU7 */ typedef enum { GST_NAVIGATION_COMMAND_INVALID = 0, GST_NAVIGATION_COMMAND_MENU1 = 1, GST_NAVIGATION_COMMAND_MENU2 = 2, GST_NAVIGATION_COMMAND_MENU3 = 3, GST_NAVIGATION_COMMAND_MENU4 = 4, GST_NAVIGATION_COMMAND_MENU5 = 5, GST_NAVIGATION_COMMAND_MENU6 = 6, GST_NAVIGATION_COMMAND_MENU7 = 7, GST_NAVIGATION_COMMAND_LEFT = 20, GST_NAVIGATION_COMMAND_RIGHT = 21, GST_NAVIGATION_COMMAND_UP = 22, GST_NAVIGATION_COMMAND_DOWN = 23, GST_NAVIGATION_COMMAND_ACTIVATE = 24, GST_NAVIGATION_COMMAND_PREV_ANGLE = 30, GST_NAVIGATION_COMMAND_NEXT_ANGLE = 31 } GstNavigationCommand; /* Some aliases for the menu command types */ #define GST_NAVIGATION_COMMAND_DVD_MENU GST_NAVIGATION_COMMAND_MENU1 #define GST_NAVIGATION_COMMAND_DVD_TITLE_MENU GST_NAVIGATION_COMMAND_MENU2 #define GST_NAVIGATION_COMMAND_DVD_ROOT_MENU GST_NAVIGATION_COMMAND_MENU3 #define GST_NAVIGATION_COMMAND_DVD_SUBPICTURE_MENU GST_NAVIGATION_COMMAND_MENU4 #define GST_NAVIGATION_COMMAND_DVD_AUDIO_MENU GST_NAVIGATION_COMMAND_MENU5 #define GST_NAVIGATION_COMMAND_DVD_ANGLE_MENU GST_NAVIGATION_COMMAND_MENU6 #define GST_NAVIGATION_COMMAND_DVD_CHAPTER_MENU GST_NAVIGATION_COMMAND_MENU7 /* Queries */ /** * GstNavigationQueryType: * @GST_NAVIGATION_QUERY_INVALID: invalid query * @GST_NAVIGATION_QUERY_COMMANDS: command query * @GST_NAVIGATION_QUERY_ANGLES: viewing angle query * * Tyoes of navigation interface queries. */ typedef enum { GST_NAVIGATION_QUERY_INVALID = 0, GST_NAVIGATION_QUERY_COMMANDS = 1, GST_NAVIGATION_QUERY_ANGLES = 2 } GstNavigationQueryType; GstNavigationQueryType gst_navigation_query_get_type (GstQuery *query); GstQuery * gst_navigation_query_new_commands (void); void gst_navigation_query_set_commands (GstQuery *query, gint n_cmds, ...); void gst_navigation_query_set_commandsv (GstQuery *query, gint n_cmds, GstNavigationCommand *cmds); gboolean gst_navigation_query_parse_commands_length (GstQuery *query, guint *n_cmds); gboolean gst_navigation_query_parse_commands_nth (GstQuery *query, guint nth, GstNavigationCommand *cmd); GstQuery * gst_navigation_query_new_angles (void); void gst_navigation_query_set_angles (GstQuery *query, guint cur_angle, guint n_angles); gboolean gst_navigation_query_parse_angles (GstQuery *query, guint *cur_angle, guint *n_angles); /* Element messages */ /** * GstNavigationMessageType: * @GST_NAVIGATION_MESSAGE_INVALID: Returned from * gst_navigation_message_get_type() when the passed message is not a * navigation message. * @GST_NAVIGATION_MESSAGE_MOUSE_OVER: Sent when the mouse moves over or leaves a * clickable region of the output, such as a DVD menu button. * @GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED: Sent when the set of available commands * changes and should re-queried by interested applications. * @GST_NAVIGATION_MESSAGE_ANGLES_CHANGED: Sent when display angles in a multi-angle * feature (such as a multiangle DVD) change - either angles have appeared or * disappeared. * * A set of notifications that may be received on the bus when navigation * related status changes. */ typedef enum { GST_NAVIGATION_MESSAGE_INVALID, GST_NAVIGATION_MESSAGE_MOUSE_OVER, GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED, GST_NAVIGATION_MESSAGE_ANGLES_CHANGED } GstNavigationMessageType; GstNavigationMessageType gst_navigation_message_get_type (GstMessage *message); GstMessage * gst_navigation_message_new_mouse_over (GstObject *src, gboolean active); gboolean gst_navigation_message_parse_mouse_over (GstMessage *message, gboolean *active); GstMessage * gst_navigation_message_new_commands_changed (GstObject *src); GstMessage * gst_navigation_message_new_angles_changed (GstObject *src, guint cur_angle, guint n_angles); gboolean gst_navigation_message_parse_angles_changed (GstMessage *message, guint *cur_angle, guint *n_angles); /* event parsing functions */ /** * GstNavigationEventType: * @GST_NAVIGATION_EVENT_INVALID: Returned from * gst_navigation_event_get_type() when the passed event is not a navigation event. * @GST_NAVIGATION_EVENT_KEY_PRESS: A key press event. Use * gst_navigation_event_parse_key_event() to extract the details from the event. * @GST_NAVIGATION_EVENT_KEY_RELEASE: A key release event. Use * gst_navigation_event_parse_key_event() to extract the details from the event. * @GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS: A mouse button press event. Use * gst_navigation_event_parse_mouse_button_event() to extract the details from the * event. * @GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE: A mouse button release event. Use * gst_navigation_event_parse_mouse_button_event() to extract the details from the * event. * @GST_NAVIGATION_EVENT_MOUSE_MOVE: A mouse movement event. Use * gst_navigation_event_parse_mouse_move_event() to extract the details from the * event. * @GST_NAVIGATION_EVENT_COMMAND: A navigation command event. Use * gst_navigation_event_parse_command() to extract the details from the event. * * Enum values for the various events that an element implementing the * GstNavigation interface might send up the pipeline. */ typedef enum { GST_NAVIGATION_EVENT_INVALID = 0, GST_NAVIGATION_EVENT_KEY_PRESS = 1, GST_NAVIGATION_EVENT_KEY_RELEASE = 2, GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS = 3, GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE = 4, GST_NAVIGATION_EVENT_MOUSE_MOVE = 5, GST_NAVIGATION_EVENT_COMMAND = 6 } GstNavigationEventType; GstNavigationEventType gst_navigation_event_get_type (GstEvent *event); gboolean gst_navigation_event_parse_key_event (GstEvent *event, const gchar **key); gboolean gst_navigation_event_parse_mouse_button_event (GstEvent *event, gint *button, gdouble *x, gdouble *y); gboolean gst_navigation_event_parse_mouse_move_event (GstEvent *event, gdouble *x, gdouble *y); gboolean gst_navigation_event_parse_command (GstEvent *event, GstNavigationCommand *command); /* interface virtual function wrappers */ void gst_navigation_send_event (GstNavigation *navigation, GstStructure *structure); void gst_navigation_send_key_event (GstNavigation *navigation, const char *event, const char *key); void gst_navigation_send_mouse_event (GstNavigation *navigation, const char *event, int button, double x, double y); void gst_navigation_send_command (GstNavigation *navigation, GstNavigationCommand command); G_END_DECLS #endif /* __GST_NAVIGATION_H__ */