1 /*****************************************************************************
2 * vlc_osd.h - OSD menu and subpictures definitions and function prototypes
3 *****************************************************************************
4 * Copyright (C) 1999-2006 the VideoLAN team
5 * Copyright (C) 2004-2005 M2X
8 * Authors: Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
9 * Gildas Bazin <gbazin@videolan.org>
11 * Added code from include/osd.h written by:
12 * Copyright (C) 2003-2005 the VideoLAN team
13 * Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
28 *****************************************************************************/
35 #include <vlc_vout_osd.h>
43 * This file defines SPU subpicture and OSD functions and object types.
46 /**********************************************************************
48 **********************************************************************/
50 * \defgroup osdmenu OSD Menu
51 * The OSD menu core creates the OSD menu structure in memory. It parses a
52 * configuration file that defines all elements that are part of the menu. The
53 * core also handles all actions and menu structure updates on behalf of video
56 * The file modules/video_filters/osdmenu.c implements a subpicture filter that
57 * specifies the final information on positioning of the current state image.
58 * A subpicture filter is called each time a video picture has to be rendered,
59 * it also gives a start and end date to the subpicture. The subpicture can be
60 * streamed if used inside a transcoding command. For example:
62 * vlc dvdsimple:///dev/dvd --extraintf rc
63 * --sout='#transcode{osd}:std{access=udp,mux=ts,dst=dest_ipaddr}'
64 * --osdmenu-file=share/osdmenu/dvd.cfg
66 * An example for local usage of the OSD menu is:
68 * vlc dvdsimple:///dev/dvd --extraintf rc
69 * --sub-filter osdmenu
70 * --osdmenu-file=share/osdmenu/dvd.cfg
72 * Each OSD menu element, called "action", defines a hotkey action. Each action
73 * can have several states (unselect, select, pressed). Each state has an image
74 * that represents the state visually. The commands "menu right", "menu left",
75 * "menu up" and "menu down" are used to navigate through the OSD menu structure.
76 * The commands "menu on" or "menu show" and "menu off" or "menu hide" respectively
77 * show and hide the OSD menu subpictures.
79 * There is one special element called "range". A range is an arbritary range
80 * of state images that can be browsed using "menu up" and "menu down" commands
81 * on the rc interface.
83 * The OSD menu configuration file uses a very simple syntax and basic parser.
84 * A configuration file has the ".cfg".
85 * An example is "share/osdmenu/dvd256.cfg".
90 * \brief The OSD Menu configuration file format.
92 * The configuration file syntax is very basic and so is its parser. See the
93 * BNF formal representation below:
95 * The keywords FILENAME and PATHNAME represent the filename and pathname
96 * specification that is valid for the Operating System VLC is compiled for.
98 * The hotkey actions that are supported by VLC are documented in the file
99 * src/libvlc. The file include/vlc_keys.h defines some hotkey internals.
101 * CONFIG_FILE = FILENAME '.cfg'
102 * WS = [ ' ' | '\t' ]+
103 * OSDMENU_PATH = PATHNAME
104 * DIR = 'dir' WS OSDMENU_PATH '\n'
105 * STYLE = 'style' [ 'default' | 'concat' ] '\n'
106 * STATE = [ 'unselect' | 'select' | 'pressed' ]
107 * HOTKEY_ACTION = 'key-' [ 'a' .. 'z', 'A' .. 'Z', '-' ]+
109 * ACTION_TYPE = 'type' 'volume' '\n'
110 * ACTION_BLOCK_START = 'action' WS HOTKEY_ACTION WS '('POS','POS')' '\n'
111 * ACTION_BLOCK_END = 'end' '\n'
112 * ACTION_STATE = STATE WS FILENAME '\n'
113 * ACTION_RANGE_START = 'range' WS HOTKEY_ACTION WS DEFAULT_INDEX '\n'
114 * ACTION_RANGE_END = 'end' '\n'
115 * ACTION_RANGE_STATE = FILENAME '\n'
117 * ACTION_BLOCK_RANGE = ACTION_RANGE_START [WS ACTION_RANGE_STATE]+ WS ACTION_RANGE_END
118 * ACTION_BLOCK = ACTION_BLOCK_START [WS ACTION_TYPE*] [ [WS ACTION_STATE]+3 | [WS ACTION_BLOCK_RANGE]+1 ] ACTION_BLOCK_END
119 * CONFIG_FILE_CONTENTS = DIR [ACTION_BLOCK]+
124 * OSD menu button states
126 * Every button has three states, either it is unselected, selected or pressed.
127 * An OSD menu skin can associate images with each state.
129 * OSD_BUTTON_UNSELECT 0
130 * OSD_BUTTON_SELECT 1
131 * OSD_BUTTON_PRESSED 2
133 #define OSD_BUTTON_UNSELECT 0
134 #define OSD_BUTTON_SELECT 1
135 #define OSD_BUTTON_PRESSED 2
140 * The OSD state object holds the state and associated images for a
141 * particular state on the screen. The picture is displayed when this
142 * state is the active state.
146 osd_state_t *p_next; /*< pointer to next state */
147 osd_state_t *p_prev; /*< pointer to previous state */
148 picture_t *p_pic; /*< picture of state */
150 char *psz_state; /*< state name */
151 int i_state; /*< state index */
153 int i_x; /*< x-position of button state image */
154 int i_y; /*< y-position of button state image */
155 int i_width; /*< width of button state image */
156 int i_height; /*< height of button state image */
162 * An OSD Button has different states. Each state has an image for display.
166 osd_button_t *p_next; /*< pointer to next button */
167 osd_button_t *p_prev; /*< pointer to previous button */
168 osd_button_t *p_up; /*< pointer to up button */
169 osd_button_t *p_down; /*< pointer to down button */
171 osd_state_t *p_current_state; /*< pointer to current state image */
172 osd_state_t *p_states; /*< doubly linked list of states */
173 picture_t *p_feedback; /*< feedback picture */
175 char *psz_name; /*< name of button */
177 /* These member should probably be a struct hotkey */
178 char *psz_action; /*< hotkey action name on button*/
179 char *psz_action_down; /*< hotkey action name on range buttons
180 for command "menu down" */
181 /* end of hotkey specifics */
183 int i_x; /*< x-position of button visible state image */
184 int i_y; /*< y-position of button visible state image */
185 int i_width; /*< width of button visible state image */
186 int i_height; /*< height of button visible state image */
188 /* range style button */
189 bool b_range; /*< button should be interpreted as range */
190 int i_ranges; /*< number of states */
196 * The images that make up an OSD menu can be created in such away that
197 * they contain all buttons in the same picture, with the selected one
198 * highlighted or being a concatenation of all the separate images. The
199 * first case is the default.
201 * To change the default style the keyword 'style' should be set to 'concat'.
204 #define OSD_MENU_STYLE_SIMPLE 0x0
205 #define OSD_MENU_STYLE_CONCAT 0x1
208 * OSD Menu State object
210 * Represents the current state as displayed.
212 /* Represent the menu state */
213 struct osd_menu_state_t
215 int i_x; /*< x position of spu region */
216 int i_y; /*< y position of spu region */
217 int i_width; /*< width of spu region */
218 int i_height; /*< height of spu region */
220 picture_t *p_pic; /*< pointer to picture to display */
221 osd_button_t *p_visible; /*< shortcut to visible button */
223 bool b_menu_visible; /*< menu currently visible? */
224 bool b_update; /*< update OSD Menu when true */
226 /* quick hack to volume state. */
227 osd_button_t *p_volume; /*< pointer to volume range object. */
233 * The main OSD Menu object, which holds a linked list to all buttons
234 * and images that defines the menu. The p_state variable represents the
235 * current state of the OSD Menu.
241 int i_x; /*< x-position of OSD Menu on the video screen */
242 int i_y; /*< y-position of OSD Menu on the video screen */
243 int i_width; /*< width of OSD Menu on the video screen */
244 int i_height; /*< height of OSD Menu on the video screen */
245 int i_style; /*< style of spu region generation */
246 int i_position; /*< display position */
248 char *psz_path; /*< directory where OSD menu images are stored */
249 osd_button_t *p_button; /*< doubly linked list of buttons */
250 osd_menu_state_t *p_state; /*< current state of OSD menu */
252 /* quick link in the linked list. */
253 osd_button_t *p_last_button; /*< pointer to last button in the list */
256 module_t *p_parser; /*< pointer to parser module */
257 char *psz_file; /*< Config file name */
258 image_handler_t *p_image; /*< handler to image loading and conversion libraries */
262 * Initialize an osd_menu_t object
264 * This functions has to be called before any call to other osd_menu_t*
265 * functions. It creates the osd_menu object and holds a pointer to it
266 * during its lifetime.
268 VLC_EXPORT( osd_menu_t *, osd_MenuCreate, ( vlc_object_t *, const char * ) LIBVLC_USED );
271 * Delete the osd_menu_t object
273 * This functions has to be called to release the associated module and
274 * memory for the osdmenu. After return of this function the pointer to
275 * osd_menu_t* is invalid.
277 VLC_EXPORT( void, osd_MenuDelete, ( vlc_object_t *, osd_menu_t * ) );
279 #define osd_MenuCreate(object,file) osd_MenuCreate( VLC_OBJECT(object), file )
280 #define osd_MenuDelete(object,osd) osd_MenuDelete( VLC_OBJECT(object), osd )
283 * Find OSD Menu button at position x,y
285 VLC_EXPORT( osd_button_t *, osd_ButtonFind, ( vlc_object_t *p_this,
286 int, int, int, int, int, int ) LIBVLC_USED );
288 #define osd_ButtonFind(object,x,y,h,w,sh,sw) osd_ButtonFind(object,x,y,h,w,sh,sw)
291 * Select the button provided as the new active button
293 VLC_EXPORT( void, osd_ButtonSelect, ( vlc_object_t *, osd_button_t *) );
295 #define osd_ButtonSelect(object,button) osd_ButtonSelect(object,button)
300 * Show the OSD menu on the video output or mux it into the stream.
301 * Every change to the OSD menu will now be visible in the output. An output
302 * can be a video output window or a stream (\see stream output)
304 VLC_EXPORT( void, osd_MenuShow, ( vlc_object_t * ) );
309 * Stop showing the OSD menu on the video output or mux it into the stream.
311 VLC_EXPORT( void, osd_MenuHide, ( vlc_object_t * ) );
314 * Activate the action of this OSD menu item.
316 * The rc interface command "menu select" triggers the sending of an
317 * hotkey action to the hotkey interface. The hotkey that belongs to
318 * the current highlighted OSD menu item will be used.
320 VLC_EXPORT( void, osd_MenuActivate, ( vlc_object_t * ) );
322 #define osd_MenuShow(object) osd_MenuShow( VLC_OBJECT(object) )
323 #define osd_MenuHide(object) osd_MenuHide( VLC_OBJECT(object) )
324 #define osd_MenuActivate(object) osd_MenuActivate( VLC_OBJECT(object) )
329 * Select the next OSD menu item to be highlighted.
330 * Note: The actual position on screen of the menu item is determined by
331 * the OSD menu configuration file.
333 VLC_EXPORT( void, osd_MenuNext, ( vlc_object_t * ) );
336 * Previous OSD menu item
338 * Select the previous OSD menu item to be highlighted.
339 * Note: The actual position on screen of the menu item is determined by
340 * the OSD menu configuration file.
342 VLC_EXPORT( void, osd_MenuPrev, ( vlc_object_t * ) );
345 * OSD menu item above
347 * Select the OSD menu item above the current item to be highlighted.
348 * Note: The actual position on screen of the menu item is determined by
349 * the OSD menu configuration file.
351 VLC_EXPORT( void, osd_MenuUp, ( vlc_object_t * ) );
354 * OSD menu item below
356 * Select the next OSD menu item below the current item to be highlighted.
357 * Note: The actual position on screen of the menu item is determined by
358 * the OSD menu configuration file.
360 VLC_EXPORT( void, osd_MenuDown, ( vlc_object_t * ) );
362 #define osd_MenuNext(object) osd_MenuNext( VLC_OBJECT(object) )
363 #define osd_MenuPrev(object) osd_MenuPrev( VLC_OBJECT(object) )
364 #define osd_MenuUp(object) osd_MenuUp( VLC_OBJECT(object) )
365 #define osd_MenuDown(object) osd_MenuDown( VLC_OBJECT(object) )
368 * Display the audio volume bitmap.
370 * Display the correct audio volume bitmap that corresponds to the
371 * current Audio Volume setting.
373 VLC_EXPORT( void, osd_Volume, ( vlc_object_t * ) );
375 #define osd_Volume(object) osd_Volume( VLC_OBJECT(object) )
378 * Retrieve a non modifyable pointer to the OSD Menu state
382 static inline const osd_menu_state_t *osd_GetMenuState( osd_menu_t *p_osd )
384 return( p_osd->p_state );
388 * Get the last key press received by the OSD Menu
390 * Returns 0 when no key has been pressed or the value of the key pressed.
393 static inline bool osd_GetKeyPressed( osd_menu_t *p_osd )
395 return( p_osd->p_state->b_update );
399 * Set the key pressed to a value.
401 * Assign a new key value to the last key pressed on the OSD Menu.
403 static inline void osd_SetKeyPressed( vlc_object_t *p_this, int i_value )
408 var_Set( p_this, "key-pressed", val );
412 * Update the OSD Menu visibility flag.
414 * true means OSD Menu should be shown. false means OSD Menu
415 * should not be shown.
417 static inline void osd_SetMenuVisible( osd_menu_t *p_osd, bool b_value )
421 val.b_bool = p_osd->p_state->b_menu_visible = b_value;
422 var_Set( p_osd, "osd-menu-visible", val );
426 * Update the OSD Menu update flag
428 * If the OSD Menu should be updated then set the update flag to
429 * true, else to false.
431 static inline void osd_SetMenuUpdate( osd_menu_t *p_osd, bool b_value )
435 val.b_bool = p_osd->p_state->b_update = b_value;
436 var_Set( p_osd, "osd-menu-update", val );
442 * Functions that provide the textual feedback on the OSD. They are shown
443 * on hotkey commands. The feedback is also part of the osd_button_t
444 * object. The types are declared in the include file include/vlc_osd.h
447 VLC_EXPORT( int, osd_ShowTextRelative, ( spu_t *, int, const char *, const text_style_t *, int, int, int, mtime_t ) );
448 VLC_EXPORT( int, osd_ShowTextAbsolute, ( spu_t *, int, const char *, const text_style_t *, int, int, int, mtime_t, mtime_t ) );
449 VLC_EXPORT( void, osd_Message, ( spu_t *, int, char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
457 #endif /* _VLC_OSD_H */