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 *****************************************************************************/
41 * This file defines SPU subpicture and OSD functions and object types.
44 /**********************************************************************
46 **********************************************************************/
48 * \defgroup spu Subpicture Unit
49 * This module describes the programming interface for the subpicture unit.
50 * It includes functions allowing to create/destroy an spu, create/destroy
51 * subpictures and render them.
57 typedef struct spu_private_t spu_private_t;
59 /* Default subpicture channel ID */
60 #define DEFAULT_CHAN 1
63 * Subpicture unit descriptor
69 int (*pf_control)( spu_t *, int, va_list );
76 SPU_CHANNEL_REGISTER, /* arg1= int * res= */
77 SPU_CHANNEL_CLEAR /* arg1= int res= */
80 static inline int spu_vaControl( spu_t *p_spu, int i_query, va_list args )
82 if( p_spu->pf_control )
83 return p_spu->pf_control( p_spu, i_query, args );
88 static inline int spu_Control( spu_t *p_spu, int i_query, ... )
93 va_start( args, i_query );
94 i_result = spu_vaControl( p_spu, i_query, args );
99 #define spu_Create(a) __spu_Create(VLC_OBJECT(a))
100 VLC_EXPORT( spu_t *, __spu_Create, ( vlc_object_t * ) );
101 VLC_EXPORT( int, spu_Init, ( spu_t * ) );
102 VLC_EXPORT( void, spu_Destroy, ( spu_t * ) );
103 void spu_Attach( spu_t *, vlc_object_t *, bool );
106 * This function sends a subpicture to the spu_t core.
108 * You cannot use the provided subpicture anymore. The spu_t core
109 * will destroy it at its convenience.
111 VLC_EXPORT( void, spu_DisplaySubpicture, ( spu_t *, subpicture_t * ) );
114 * This function asks the spu_t core a list of subpictures to display.
116 * The returned list can only be used by spu_RenderSubpictures.
118 VLC_EXPORT( subpicture_t *, spu_SortSubpictures, ( spu_t *, mtime_t render_subtitle_date, bool b_subtitle_only ) );
121 * This function renders a list of subpicture_t on the provided picture.
123 * \param p_fmt_dst is the format of the destination picture.
124 * \param p_fmt_src is the format of the original(source) video.
126 VLC_EXPORT( void, spu_RenderSubpictures, ( spu_t *, picture_t *, const video_format_t *p_fmt_dst, subpicture_t *p_list, const video_format_t *p_fmt_src, mtime_t render_subtitle_date ) );
130 /**********************************************************************
132 **********************************************************************/
134 * \defgroup osdmenu OSD Menu
135 * The OSD menu core creates the OSD menu structure in memory. It parses a
136 * configuration file that defines all elements that are part of the menu. The
137 * core also handles all actions and menu structure updates on behalf of video
138 * subpicture filters.
140 * The file modules/video_filters/osdmenu.c implements a subpicture filter that
141 * specifies the final information on positioning of the current state image.
142 * A subpicture filter is called each time a video picture has to be rendered,
143 * it also gives a start and end date to the subpicture. The subpicture can be
144 * streamed if used inside a transcoding command. For example:
146 * vlc dvdsimple:///dev/dvd --extraintf rc
147 * --sout='#transcode{osd}:std{access=udp,mux=ts,dst=dest_ipaddr}'
148 * --osdmenu-file=share/osdmenu/dvd.cfg
150 * An example for local usage of the OSD menu is:
152 * vlc dvdsimple:///dev/dvd --extraintf rc
153 * --sub-filter osdmenu
154 * --osdmenu-file=share/osdmenu/dvd.cfg
156 * Each OSD menu element, called "action", defines a hotkey action. Each action
157 * can have several states (unselect, select, pressed). Each state has an image
158 * that represents the state visually. The commands "menu right", "menu left",
159 * "menu up" and "menu down" are used to navigate through the OSD menu structure.
160 * The commands "menu on" or "menu show" and "menu off" or "menu hide" respectively
161 * show and hide the OSD menu subpictures.
163 * There is one special element called "range". A range is an arbritary range
164 * of state images that can be browsed using "menu up" and "menu down" commands
165 * on the rc interface.
167 * The OSD menu configuration file uses a very simple syntax and basic parser.
168 * A configuration file has the ".cfg".
169 * An example is "share/osdmenu/dvd256.cfg".
174 * \brief The OSD Menu configuration file format.
176 * The configuration file syntax is very basic and so is its parser. See the
177 * BNF formal representation below:
179 * The keywords FILENAME and PATHNAME represent the filename and pathname
180 * specification that is valid for the Operating System VLC is compiled for.
182 * The hotkey actions that are supported by VLC are documented in the file
183 * src/libvlc. The file include/vlc_keys.h defines some hotkey internals.
185 * CONFIG_FILE = FILENAME '.cfg'
186 * WS = [ ' ' | '\t' ]+
187 * OSDMENU_PATH = PATHNAME
188 * DIR = 'dir' WS OSDMENU_PATH '\n'
189 * STYLE = 'style' [ 'default' | 'concat' ] '\n'
190 * STATE = [ 'unselect' | 'select' | 'pressed' ]
191 * HOTKEY_ACTION = 'key-' [ 'a' .. 'z', 'A' .. 'Z', '-' ]+
193 * ACTION_TYPE = 'type' 'volume' '\n'
194 * ACTION_BLOCK_START = 'action' WS HOTKEY_ACTION WS '('POS','POS')' '\n'
195 * ACTION_BLOCK_END = 'end' '\n'
196 * ACTION_STATE = STATE WS FILENAME '\n'
197 * ACTION_RANGE_START = 'range' WS HOTKEY_ACTION WS DEFAULT_INDEX '\n'
198 * ACTION_RANGE_END = 'end' '\n'
199 * ACTION_RANGE_STATE = FILENAME '\n'
201 * ACTION_BLOCK_RANGE = ACTION_RANGE_START [WS ACTION_RANGE_STATE]+ WS ACTION_RANGE_END
202 * ACTION_BLOCK = ACTION_BLOCK_START [WS ACTION_TYPE*] [ [WS ACTION_STATE]+3 | [WS ACTION_BLOCK_RANGE]+1 ] ACTION_BLOCK_END
203 * CONFIG_FILE_CONTENTS = DIR [ACTION_BLOCK]+
208 * OSD menu position and picture type defines
211 #define OSD_ALIGN_LEFT 0x1
212 #define OSD_ALIGN_RIGHT 0x2
213 #define OSD_ALIGN_TOP 0x4
214 #define OSD_ALIGN_BOTTOM 0x8
216 #define OSD_HOR_SLIDER 1
217 #define OSD_VERT_SLIDER 2
219 #define OSD_PLAY_ICON 1
220 #define OSD_PAUSE_ICON 2
221 #define OSD_SPEAKER_ICON 3
222 #define OSD_MUTE_ICON 4
227 * A text style is used to specify the formatting of text.
228 * A font renderer can use the supplied information to render the
233 char * psz_fontname; /**< The name of the font */
234 int i_font_size; /**< The font size in pixels */
235 int i_font_color; /**< The color of the text 0xRRGGBB
236 (native endianness) */
237 int i_font_alpha; /**< The transparency of the text.
238 0x00 is fully opaque,
239 0xFF fully transparent */
240 int i_style_flags; /**< Formatting style flags */
241 int i_outline_color; /**< The color of the outline 0xRRGGBB */
242 int i_outline_alpha; /**< The transparency of the outline.
243 0x00 is fully opaque,
244 0xFF fully transparent */
245 int i_shadow_color; /**< The color of the shadow 0xRRGGBB */
246 int i_shadow_alpha; /**< The transparency of the shadow.
247 0x00 is fully opaque,
248 0xFF fully transparent */
249 int i_background_color;/**< The color of the background 0xRRGGBB */
250 int i_background_alpha;/**< The transparency of the background.
251 0x00 is fully opaque,
252 0xFF fully transparent */
253 int i_karaoke_background_color;/**< Background color for karaoke 0xRRGGBB */
254 int i_karaoke_background_alpha;/**< The transparency of the karaoke bg.
255 0x00 is fully opaque,
256 0xFF fully transparent */
257 int i_outline_width; /**< The width of the outline in pixels */
258 int i_shadow_width; /**< The width of the shadow in pixels */
259 int i_spacing; /**< The spaceing between glyphs in pixels */
262 /* Style flags for \ref text_style_t */
264 #define STYLE_ITALIC 2
265 #define STYLE_OUTLINE 4
266 #define STYLE_SHADOW 8
267 #define STYLE_BACKGROUND 16
268 #define STYLE_UNDERLINE 32
269 #define STYLE_STRIKEOUT 64
272 * Create a default text style
274 VLC_EXPORT( text_style_t *, text_style_New, ( void ) );
277 * Copy a text style into another
279 VLC_EXPORT( text_style_t *, text_style_Copy, ( text_style_t *, const text_style_t * ) );
282 * Duplicate a text style
284 VLC_EXPORT( text_style_t *, text_style_Duplicate, ( const text_style_t * ) );
287 * Delete a text style created by text_style_New or text_style_Duplicate
289 VLC_EXPORT( void, text_style_Delete, ( text_style_t * ) );
292 * OSD menu button states
294 * Every button has three states, either it is unselected, selected or pressed.
295 * An OSD menu skin can associate images with each state.
297 * OSD_BUTTON_UNSELECT 0
298 * OSD_BUTTON_SELECT 1
299 * OSD_BUTTON_PRESSED 2
301 #define OSD_BUTTON_UNSELECT 0
302 #define OSD_BUTTON_SELECT 1
303 #define OSD_BUTTON_PRESSED 2
308 * The OSD state object holds the state and associated images for a
309 * particular state on the screen. The picture is displayed when this
310 * state is the active state.
314 osd_state_t *p_next; /*< pointer to next state */
315 osd_state_t *p_prev; /*< pointer to previous state */
316 picture_t *p_pic; /*< picture of state */
318 char *psz_state; /*< state name */
319 int i_state; /*< state index */
321 int i_x; /*< x-position of button state image */
322 int i_y; /*< y-position of button state image */
323 int i_width; /*< width of button state image */
324 int i_height; /*< height of button state image */
330 * An OSD Button has different states. Each state has an image for display.
334 osd_button_t *p_next; /*< pointer to next button */
335 osd_button_t *p_prev; /*< pointer to previous button */
336 osd_button_t *p_up; /*< pointer to up button */
337 osd_button_t *p_down; /*< pointer to down button */
339 osd_state_t *p_current_state; /*< pointer to current state image */
340 osd_state_t *p_states; /*< doubly linked list of states */
341 picture_t *p_feedback; /*< feedback picture */
343 char *psz_name; /*< name of button */
345 /* These member should probably be a struct hotkey */
346 char *psz_action; /*< hotkey action name on button*/
347 char *psz_action_down; /*< hotkey action name on range buttons
348 for command "menu down" */
349 /* end of hotkey specifics */
351 int i_x; /*< x-position of button visible state image */
352 int i_y; /*< y-position of button visible state image */
353 int i_width; /*< width of button visible state image */
354 int i_height; /*< height of button visible state image */
356 /* range style button */
357 bool b_range; /*< button should be interpreted as range */
358 int i_ranges; /*< number of states */
364 * The images that make up an OSD menu can be created in such away that
365 * they contain all buttons in the same picture, with the selected one
366 * highlighted or being a concatenation of all the seperate images. The
367 * first case is the default.
369 * To change the default style the keyword 'style' should be set to 'concat'.
372 #define OSD_MENU_STYLE_SIMPLE 0x0
373 #define OSD_MENU_STYLE_CONCAT 0x1
376 * OSD Menu State object
378 * Represents the current state as displayed.
380 /* Represent the menu state */
381 struct osd_menu_state_t
383 int i_x; /*< x position of spu region */
384 int i_y; /*< y position of spu region */
385 int i_width; /*< width of spu region */
386 int i_height; /*< height of spu region */
388 picture_t *p_pic; /*< pointer to picture to display */
389 osd_button_t *p_visible; /*< shortcut to visible button */
391 bool b_menu_visible; /*< menu currently visible? */
392 bool b_update; /*< update OSD Menu when true */
394 /* quick hack to volume state. */
395 osd_button_t *p_volume; /*< pointer to volume range object. */
401 * The main OSD Menu object, which holds a linked list to all buttons
402 * and images that defines the menu. The p_state variable represents the
403 * current state of the OSD Menu.
409 int i_x; /*< x-position of OSD Menu on the video screen */
410 int i_y; /*< y-position of OSD Menu on the video screen */
411 int i_width; /*< width of OSD Menu on the video screen */
412 int i_height; /*< height of OSD Menu on the video screen */
413 int i_style; /*< style of spu region generation */
414 int i_position; /*< display position */
416 char *psz_path; /*< directory where OSD menu images are stored */
417 osd_button_t *p_button; /*< doubly linked list of buttons */
418 osd_menu_state_t *p_state; /*< current state of OSD menu */
420 /* quick link in the linked list. */
421 osd_button_t *p_last_button; /*< pointer to last button in the list */
424 module_t *p_parser; /*< pointer to parser module */
425 char *psz_file; /*< Config file name */
426 image_handler_t *p_image; /*< handler to image loading and conversion libraries */
430 * Initialize an osd_menu_t object
432 * This functions has to be called before any call to other osd_menu_t*
433 * functions. It creates the osd_menu object and holds a pointer to it
434 * during its lifetime.
436 VLC_EXPORT( osd_menu_t *, __osd_MenuCreate, ( vlc_object_t *, const char * ) );
439 * Delete the osd_menu_t object
441 * This functions has to be called to release the associated module and
442 * memory for the osdmenu. After return of this function the pointer to
443 * osd_menu_t* is invalid.
445 VLC_EXPORT( void, __osd_MenuDelete, ( vlc_object_t *, osd_menu_t * ) );
447 #define osd_MenuCreate(object,file) __osd_MenuCreate( VLC_OBJECT(object), file )
448 #define osd_MenuDelete(object,osd) __osd_MenuDelete( VLC_OBJECT(object), osd )
451 * Find OSD Menu button at position x,y
453 VLC_EXPORT( osd_button_t *, __osd_ButtonFind, ( vlc_object_t *p_this,
454 int, int, int, int, int, int ) );
456 #define osd_ButtonFind(object,x,y,h,w,sh,sw) __osd_ButtonFind(object,x,y,h,w,sh,sw)
459 * Select the button provided as the new active button
461 VLC_EXPORT( void, __osd_ButtonSelect, ( vlc_object_t *, osd_button_t *) );
463 #define osd_ButtonSelect(object,button) __osd_ButtonSelect(object,button)
468 * Show the OSD menu on the video output or mux it into the stream.
469 * Every change to the OSD menu will now be visible in the output. An output
470 * can be a video output window or a stream (\see stream output)
472 VLC_EXPORT( void, __osd_MenuShow, ( vlc_object_t * ) );
477 * Stop showing the OSD menu on the video output or mux it into the stream.
479 VLC_EXPORT( void, __osd_MenuHide, ( vlc_object_t * ) );
482 * Activate the action of this OSD menu item.
484 * The rc interface command "menu select" triggers the sending of an
485 * hotkey action to the hotkey interface. The hotkey that belongs to
486 * the current highlighted OSD menu item will be used.
488 VLC_EXPORT( void, __osd_MenuActivate, ( vlc_object_t * ) );
490 #define osd_MenuShow(object) __osd_MenuShow( VLC_OBJECT(object) )
491 #define osd_MenuHide(object) __osd_MenuHide( VLC_OBJECT(object) )
492 #define osd_MenuActivate(object) __osd_MenuActivate( VLC_OBJECT(object) )
497 * Select the next OSD menu item to be highlighted.
498 * Note: The actual position on screen of the menu item is determined by
499 * the OSD menu configuration file.
501 VLC_EXPORT( void, __osd_MenuNext, ( vlc_object_t * ) );
504 * Previous OSD menu item
506 * Select the previous OSD menu item to be highlighted.
507 * Note: The actual position on screen of the menu item is determined by
508 * the OSD menu configuration file.
510 VLC_EXPORT( void, __osd_MenuPrev, ( vlc_object_t * ) );
513 * OSD menu item above
515 * Select the OSD menu item above the current item to be highlighted.
516 * Note: The actual position on screen of the menu item is determined by
517 * the OSD menu configuration file.
519 VLC_EXPORT( void, __osd_MenuUp, ( vlc_object_t * ) );
522 * OSD menu item below
524 * Select the next OSD menu item below the current item to be highlighted.
525 * Note: The actual position on screen of the menu item is determined by
526 * the OSD menu configuration file.
528 VLC_EXPORT( void, __osd_MenuDown, ( vlc_object_t * ) );
530 #define osd_MenuNext(object) __osd_MenuNext( VLC_OBJECT(object) )
531 #define osd_MenuPrev(object) __osd_MenuPrev( VLC_OBJECT(object) )
532 #define osd_MenuUp(object) __osd_MenuUp( VLC_OBJECT(object) )
533 #define osd_MenuDown(object) __osd_MenuDown( VLC_OBJECT(object) )
536 * Display the audio volume bitmap.
538 * Display the correct audio volume bitmap that corresponds to the
539 * current Audio Volume setting.
541 VLC_EXPORT( void, __osd_Volume, ( vlc_object_t * ) );
543 #define osd_Volume(object) __osd_Volume( VLC_OBJECT(object) )
546 * Retrieve a non modifyable pointer to the OSD Menu state
549 static inline const osd_menu_state_t *osd_GetMenuState( osd_menu_t *p_osd )
551 return( p_osd->p_state );
555 * Get the last key press received by the OSD Menu
557 * Returns 0 when no key has been pressed or the value of the key pressed.
559 static inline bool osd_GetKeyPressed( osd_menu_t *p_osd )
561 return( p_osd->p_state->b_update );
565 * Set the key pressed to a value.
567 * Assign a new key value to the last key pressed on the OSD Menu.
569 static inline void osd_SetKeyPressed( vlc_object_t *p_this, int i_value )
574 var_Set( p_this, "key-pressed", val );
578 * Update the OSD Menu visibility flag.
580 * true means OSD Menu should be shown. false means OSD Menu
581 * should not be shown.
583 static inline void osd_SetMenuVisible( osd_menu_t *p_osd, bool b_value )
587 val.b_bool = p_osd->p_state->b_menu_visible = b_value;
588 var_Set( p_osd, "osd-menu-visible", val );
592 * Update the OSD Menu update flag
594 * If the OSD Menu should be updated then set the update flag to
595 * true, else to false.
597 static inline void osd_SetMenuUpdate( osd_menu_t *p_osd, bool b_value )
601 val.b_bool = p_osd->p_state->b_update = b_value;
602 var_Set( p_osd, "osd-menu-update", val );
608 * Functions that provide the textual feedback on the OSD. They are shown
609 * on hotkey commands. The feedback is also part of the osd_button_t
610 * object. The types are declared in the include file include/vlc_osd.h
613 VLC_EXPORT( int, osd_ShowTextRelative, ( spu_t *, int, const char *, const text_style_t *, int, int, int, mtime_t ) );
614 VLC_EXPORT( int, osd_ShowTextAbsolute, ( spu_t *, int, const char *, const text_style_t *, int, int, int, mtime_t, mtime_t ) );
615 VLC_EXPORT( void, osd_Message, ( spu_t *, int, char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
618 * Default feedback images
620 * Functions that provide the default OSD feedback images on hotkey
621 * commands. These feedback images are also part of the osd_button_t
622 * object. The types are declared in the include file include/vlc_osd.h
625 VLC_EXPORT( int, osd_Slider, ( vlc_object_t *, spu_t *, int, int, int, int, int, int, short ) );
626 VLC_EXPORT( int, osd_Icon, ( vlc_object_t *, spu_t *, int, int, int, int, int, short ) );
630 /**********************************************************************
631 * Vout text and widget overlays
632 **********************************************************************/
634 VLC_EXPORT( int, vout_ShowTextRelative, ( vout_thread_t *, int, char *, const text_style_t *, int, int, int, mtime_t ) );
636 VLC_EXPORT( int, vout_ShowTextAbsolute, ( vout_thread_t *, int, const char *, const text_style_t *, int, int, int, mtime_t, mtime_t ) );
639 * Write an informative message at the default location,
640 * for the default duration and only if the OSD option is enabled.
641 * \param p_caller The object that called the function.
642 * \param i_channel Subpicture channel
643 * \param psz_format printf style formatting
645 VLC_EXPORT( void, __vout_OSDMessage, ( vlc_object_t *, int, const char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
648 * Same as __vlc_OSDMessage() but with automatic casting
650 #define vout_OSDMessage( obj, chan, ...) \
651 __vout_OSDMessage( VLC_OBJECT(obj), chan, __VA_ARGS__ )
654 * Display a slider on the video output.
655 * \param p_this The object that called the function.
656 * \param i_channel Subpicture channel
657 * \param i_postion Current position in the slider
658 * \param i_type Types are: OSD_HOR_SLIDER and OSD_VERT_SLIDER.
661 VLC_EXPORT( void, vout_OSDSlider, ( vlc_object_t *, int, int , short ) );
664 * Display an Icon on the video output.
665 * \param p_this The object that called the function.
666 * \param i_channel Subpicture channel
667 * \param i_type Types are: OSD_PLAY_ICON, OSD_PAUSE_ICON, OSD_SPEAKER_ICON, OSD_MUTE_ICON
670 VLC_EXPORT( void, vout_OSDIcon, ( vlc_object_t *, int, short ) );
676 #endif /* _VLC_OSD_H */