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265 lines
12 KiB
C
265 lines
12 KiB
C
/* GStreamer Navigation
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* Copyright (C) 2003 David A. Schleef <ds@schleef.org>
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*
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* navigation.h: navigation interface design
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_NAVIGATION_H__
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#define __GST_NAVIGATION_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_NAVIGATION \
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(gst_navigation_get_type ())
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#define GST_NAVIGATION(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_NAVIGATION, GstNavigation))
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#define GST_IS_NAVIGATION(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_NAVIGATION))
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#define GST_NAVIGATION_GET_INTERFACE(obj) \
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(G_TYPE_INSTANCE_GET_INTERFACE ((obj), GST_TYPE_NAVIGATION, GstNavigationInterface))
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typedef struct _GstNavigation GstNavigation;
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typedef struct _GstNavigationInterface GstNavigationInterface;
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/**
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* GstNavigationInterface:
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* @iface: the parent interface
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* @send_event: sending a navigation event
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*
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* Navigation interface.
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*/
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struct _GstNavigationInterface {
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GTypeInterface iface;
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/* virtual functions */
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void (*send_event) (GstNavigation *navigation, GstStructure *structure);
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};
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GType gst_navigation_get_type (void);
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/* Navigation commands */
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/**
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* GstNavigationCommand:
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* @GST_NAVIGATION_COMMAND_INVALID: An invalid command entry
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* @GST_NAVIGATION_COMMAND_MENU1: Execute navigation menu command 1. For DVD,
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* this enters the DVD root menu, or exits back to the title from the menu.
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* @GST_NAVIGATION_COMMAND_MENU2: Execute navigation menu command 2. For DVD,
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* this jumps to the DVD title menu.
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* @GST_NAVIGATION_COMMAND_MENU3: Execute navigation menu command 3. For DVD,
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* this jumps into the DVD root menu.
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* @GST_NAVIGATION_COMMAND_MENU4: Execute navigation menu command 4. For DVD,
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* this jumps to the Subpicture menu.
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* @GST_NAVIGATION_COMMAND_MENU5: Execute navigation menu command 5. For DVD,
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* the jumps to the audio menu.
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* @GST_NAVIGATION_COMMAND_MENU6: Execute navigation menu command 6. For DVD,
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* this jumps to the angles menu.
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* @GST_NAVIGATION_COMMAND_MENU7: Execute navigation menu command 7. For DVD,
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* this jumps to the chapter menu.
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* @GST_NAVIGATION_COMMAND_LEFT: Select the next button to the left in a menu,
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* if such a button exists.
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* @GST_NAVIGATION_COMMAND_RIGHT: Select the next button to the right in a menu,
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* if such a button exists.
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* @GST_NAVIGATION_COMMAND_UP: Select the button above the current one in a
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* menu, if such a button exists.
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* @GST_NAVIGATION_COMMAND_DOWN: Select the button below the current one in a
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* menu, if such a button exists.
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* @GST_NAVIGATION_COMMAND_ACTIVATE: Activate (click) the currently selected
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* button in a menu, if such a button exists.
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* @GST_NAVIGATION_COMMAND_PREV_ANGLE: Switch to the previous angle in a
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* multiangle feature.
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* @GST_NAVIGATION_COMMAND_NEXT_ANGLE: Switch to the next angle in a multiangle
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* feature.
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*
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* A set of commands that may be issued to an element providing the
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* #GstNavigation interface. The available commands can be queried via
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* the gst_navigation_query_new_commands() query.
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*
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* For convenience in handling DVD navigation, the MENU commands are aliased as:
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* GST_NAVIGATION_COMMAND_DVD_MENU = @GST_NAVIGATION_COMMAND_MENU1
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* GST_NAVIGATION_COMMAND_DVD_TITLE_MENU = @GST_NAVIGATION_COMMAND_MENU2
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* GST_NAVIGATION_COMMAND_DVD_ROOT_MENU = @GST_NAVIGATION_COMMAND_MENU3
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* GST_NAVIGATION_COMMAND_DVD_SUBPICTURE_MENU = @GST_NAVIGATION_COMMAND_MENU4
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* GST_NAVIGATION_COMMAND_DVD_AUDIO_MENU = @GST_NAVIGATION_COMMAND_MENU5
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* GST_NAVIGATION_COMMAND_DVD_ANGLE_MENU = @GST_NAVIGATION_COMMAND_MENU6
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* GST_NAVIGATION_COMMAND_DVD_CHAPTER_MENU = @GST_NAVIGATION_COMMAND_MENU7
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*/
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typedef enum {
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GST_NAVIGATION_COMMAND_INVALID = 0,
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GST_NAVIGATION_COMMAND_MENU1 = 1,
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GST_NAVIGATION_COMMAND_MENU2 = 2,
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GST_NAVIGATION_COMMAND_MENU3 = 3,
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GST_NAVIGATION_COMMAND_MENU4 = 4,
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GST_NAVIGATION_COMMAND_MENU5 = 5,
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GST_NAVIGATION_COMMAND_MENU6 = 6,
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GST_NAVIGATION_COMMAND_MENU7 = 7,
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GST_NAVIGATION_COMMAND_LEFT = 20,
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GST_NAVIGATION_COMMAND_RIGHT = 21,
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GST_NAVIGATION_COMMAND_UP = 22,
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GST_NAVIGATION_COMMAND_DOWN = 23,
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GST_NAVIGATION_COMMAND_ACTIVATE = 24,
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GST_NAVIGATION_COMMAND_PREV_ANGLE = 30,
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GST_NAVIGATION_COMMAND_NEXT_ANGLE = 31
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} GstNavigationCommand;
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/* Some aliases for the menu command types */
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#define GST_NAVIGATION_COMMAND_DVD_MENU GST_NAVIGATION_COMMAND_MENU1
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#define GST_NAVIGATION_COMMAND_DVD_TITLE_MENU GST_NAVIGATION_COMMAND_MENU2
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#define GST_NAVIGATION_COMMAND_DVD_ROOT_MENU GST_NAVIGATION_COMMAND_MENU3
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#define GST_NAVIGATION_COMMAND_DVD_SUBPICTURE_MENU GST_NAVIGATION_COMMAND_MENU4
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#define GST_NAVIGATION_COMMAND_DVD_AUDIO_MENU GST_NAVIGATION_COMMAND_MENU5
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#define GST_NAVIGATION_COMMAND_DVD_ANGLE_MENU GST_NAVIGATION_COMMAND_MENU6
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#define GST_NAVIGATION_COMMAND_DVD_CHAPTER_MENU GST_NAVIGATION_COMMAND_MENU7
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/* Queries */
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/**
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* GstNavigationQueryType:
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* @GST_NAVIGATION_QUERY_INVALID: invalid query
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* @GST_NAVIGATION_QUERY_COMMANDS: command query
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* @GST_NAVIGATION_QUERY_ANGLES: viewing angle query
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*
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* Tyoes of navigation interface queries.
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*/
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typedef enum
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{
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GST_NAVIGATION_QUERY_INVALID = 0,
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GST_NAVIGATION_QUERY_COMMANDS = 1,
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GST_NAVIGATION_QUERY_ANGLES = 2
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} GstNavigationQueryType;
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GstNavigationQueryType gst_navigation_query_get_type (GstQuery *query);
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GstQuery * gst_navigation_query_new_commands (void);
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void gst_navigation_query_set_commands (GstQuery *query, gint n_cmds, ...);
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void gst_navigation_query_set_commandsv (GstQuery *query, gint n_cmds,
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GstNavigationCommand *cmds);
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gboolean gst_navigation_query_parse_commands_length (GstQuery *query,
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guint *n_cmds);
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gboolean gst_navigation_query_parse_commands_nth (GstQuery *query, guint nth,
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GstNavigationCommand *cmd);
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GstQuery * gst_navigation_query_new_angles (void);
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void gst_navigation_query_set_angles (GstQuery *query, guint cur_angle,
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guint n_angles);
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gboolean gst_navigation_query_parse_angles (GstQuery *query, guint *cur_angle,
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guint *n_angles);
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/* Element messages */
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/**
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* GstNavigationMessageType:
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* @GST_NAVIGATION_MESSAGE_INVALID: Returned from
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* gst_navigation_message_get_type() when the passed message is not a
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* navigation message.
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* @GST_NAVIGATION_MESSAGE_MOUSE_OVER: Sent when the mouse moves over or leaves a
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* clickable region of the output, such as a DVD menu button.
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* @GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED: Sent when the set of available commands
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* changes and should re-queried by interested applications.
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* @GST_NAVIGATION_MESSAGE_ANGLES_CHANGED: Sent when display angles in a multi-angle
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* feature (such as a multiangle DVD) change - either angles have appeared or
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* disappeared.
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*
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* A set of notifications that may be received on the bus when navigation
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* related status changes.
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*/
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typedef enum {
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GST_NAVIGATION_MESSAGE_INVALID,
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GST_NAVIGATION_MESSAGE_MOUSE_OVER,
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GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED,
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GST_NAVIGATION_MESSAGE_ANGLES_CHANGED
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} GstNavigationMessageType;
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GstNavigationMessageType gst_navigation_message_get_type (GstMessage *message);
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GstMessage * gst_navigation_message_new_mouse_over (GstObject *src,
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gboolean active);
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gboolean gst_navigation_message_parse_mouse_over (GstMessage *message,
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gboolean *active);
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GstMessage * gst_navigation_message_new_commands_changed (GstObject *src);
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GstMessage * gst_navigation_message_new_angles_changed (GstObject *src,
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guint cur_angle,
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guint n_angles);
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gboolean gst_navigation_message_parse_angles_changed (GstMessage *message,
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guint *cur_angle,
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guint *n_angles);
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/* event parsing functions */
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/**
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* GstNavigationEventType:
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* @GST_NAVIGATION_EVENT_INVALID: Returned from
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* gst_navigation_event_get_type() when the passed event is not a navigation event.
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* @GST_NAVIGATION_EVENT_KEY_PRESS: A key press event. Use
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* gst_navigation_event_parse_key_event() to extract the details from the event.
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* @GST_NAVIGATION_EVENT_KEY_RELEASE: A key release event. Use
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* gst_navigation_event_parse_key_event() to extract the details from the event.
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* @GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS: A mouse button press event. Use
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* gst_navigation_event_parse_mouse_button_event() to extract the details from the
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* event.
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* @GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE: A mouse button release event. Use
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* gst_navigation_event_parse_mouse_button_event() to extract the details from the
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* event.
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* @GST_NAVIGATION_EVENT_MOUSE_MOVE: A mouse movement event. Use
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* gst_navigation_event_parse_mouse_move_event() to extract the details from the
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* event.
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* @GST_NAVIGATION_EVENT_COMMAND: A navigation command event. Use
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* gst_navigation_event_parse_command() to extract the details from the event.
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*
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* Enum values for the various events that an element implementing the
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* GstNavigation interface might send up the pipeline.
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*/
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typedef enum {
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GST_NAVIGATION_EVENT_INVALID = 0,
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GST_NAVIGATION_EVENT_KEY_PRESS = 1,
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GST_NAVIGATION_EVENT_KEY_RELEASE = 2,
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GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS = 3,
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GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE = 4,
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GST_NAVIGATION_EVENT_MOUSE_MOVE = 5,
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GST_NAVIGATION_EVENT_COMMAND = 6
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} GstNavigationEventType;
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GstNavigationEventType gst_navigation_event_get_type (GstEvent *event);
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gboolean gst_navigation_event_parse_key_event (GstEvent *event,
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const gchar **key);
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gboolean gst_navigation_event_parse_mouse_button_event (GstEvent *event,
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gint *button, gdouble *x, gdouble *y);
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gboolean gst_navigation_event_parse_mouse_move_event (GstEvent *event,
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gdouble *x, gdouble *y);
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gboolean gst_navigation_event_parse_command (GstEvent *event,
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GstNavigationCommand *command);
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/* interface virtual function wrappers */
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void gst_navigation_send_event (GstNavigation *navigation,
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GstStructure *structure);
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void gst_navigation_send_key_event (GstNavigation *navigation,
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const char *event, const char *key);
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void gst_navigation_send_mouse_event (GstNavigation *navigation,
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const char *event, int button, double x, double y);
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void gst_navigation_send_command (GstNavigation *navigation,
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GstNavigationCommand command);
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G_END_DECLS
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#endif /* __GST_NAVIGATION_H__ */
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