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;
60 * Subpicture unit descriptor
66 int (*pf_control)( spu_t *, int, va_list );
73 SPU_CHANNEL_REGISTER, /* arg1= int * res= */
74 SPU_CHANNEL_CLEAR /* arg1= int res= */
77 static inline int spu_vaControl( spu_t *p_spu, int i_query, va_list args )
79 if( p_spu->pf_control )
80 return p_spu->pf_control( p_spu, i_query, args );
85 static inline int spu_Control( spu_t *p_spu, int i_query, ... )
90 va_start( args, i_query );
91 i_result = spu_vaControl( p_spu, i_query, args );
96 #define spu_Create(a) __spu_Create(VLC_OBJECT(a))
97 VLC_EXPORT( spu_t *, __spu_Create, ( vlc_object_t * ) );
98 VLC_EXPORT( int, spu_Init, ( spu_t * ) );
99 VLC_EXPORT( void, spu_Destroy, ( spu_t * ) );
100 void spu_Attach( spu_t *, vlc_object_t *, bool );
102 VLC_EXPORT( subpicture_t *, spu_CreateSubpicture, ( spu_t * ) );
103 /* XXX you cannot call spu_DestroySubpicture on a displayed picture */
104 VLC_EXPORT( void, spu_DestroySubpicture, ( spu_t *, subpicture_t * ) );
105 VLC_EXPORT( void, spu_DisplaySubpicture, ( spu_t *, subpicture_t * ) );
107 VLC_EXPORT( subpicture_t *, spu_SortSubpictures, ( spu_t *, mtime_t display_date, bool b_paused, bool b_subtitle_only ) );
110 * This function renders a list of subpicture_t on the provided picture.
112 * \param p_fmt_dst is the format of the destination picture.
113 * \param p_fmt_src is the format of the original(source) video.
115 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 ) );
119 /**********************************************************************
121 **********************************************************************/
123 * \defgroup osdmenu OSD Menu
124 * The OSD menu core creates the OSD menu structure in memory. It parses a
125 * configuration file that defines all elements that are part of the menu. The
126 * core also handles all actions and menu structure updates on behalf of video
127 * subpicture filters.
129 * The file modules/video_filters/osdmenu.c implements a subpicture filter that
130 * specifies the final information on positioning of the current state image.
131 * A subpicture filter is called each time a video picture has to be rendered,
132 * it also gives a start and end date to the subpicture. The subpicture can be
133 * streamed if used inside a transcoding command. For example:
135 * vlc dvdsimple:///dev/dvd --extraintf rc
136 * --sout='#transcode{osd}:std{access=udp,mux=ts,dst=dest_ipaddr}'
137 * --osdmenu-file=share/osdmenu/dvd.cfg
139 * An example for local usage of the OSD menu is:
141 * vlc dvdsimple:///dev/dvd --extraintf rc
142 * --sub-filter osdmenu
143 * --osdmenu-file=share/osdmenu/dvd.cfg
145 * Each OSD menu element, called "action", defines a hotkey action. Each action
146 * can have several states (unselect, select, pressed). Each state has an image
147 * that represents the state visually. The commands "menu right", "menu left",
148 * "menu up" and "menu down" are used to navigate through the OSD menu structure.
149 * The commands "menu on" or "menu show" and "menu off" or "menu hide" respectively
150 * show and hide the OSD menu subpictures.
152 * There is one special element called "range". A range is an arbritary range
153 * of state images that can be browsed using "menu up" and "menu down" commands
154 * on the rc interface.
156 * The OSD menu configuration file uses a very simple syntax and basic parser.
157 * A configuration file has the ".cfg".
158 * An example is "share/osdmenu/dvd256.cfg".
163 * \brief The OSD Menu configuration file format.
165 * The configuration file syntax is very basic and so is its parser. See the
166 * BNF formal representation below:
168 * The keywords FILENAME and PATHNAME represent the filename and pathname
169 * specification that is valid for the Operating System VLC is compiled for.
171 * The hotkey actions that are supported by VLC are documented in the file
172 * src/libvlc. The file include/vlc_keys.h defines some hotkey internals.
174 * CONFIG_FILE = FILENAME '.cfg'
175 * WS = [ ' ' | '\t' ]+
176 * OSDMENU_PATH = PATHNAME
177 * DIR = 'dir' WS OSDMENU_PATH '\n'
178 * STYLE = 'style' [ 'default' | 'concat' ] '\n'
179 * STATE = [ 'unselect' | 'select' | 'pressed' ]
180 * HOTKEY_ACTION = 'key-' [ 'a' .. 'z', 'A' .. 'Z', '-' ]+
182 * ACTION_TYPE = 'type' 'volume' '\n'
183 * ACTION_BLOCK_START = 'action' WS HOTKEY_ACTION WS '('POS','POS')' '\n'
184 * ACTION_BLOCK_END = 'end' '\n'
185 * ACTION_STATE = STATE WS FILENAME '\n'
186 * ACTION_RANGE_START = 'range' WS HOTKEY_ACTION WS DEFAULT_INDEX '\n'
187 * ACTION_RANGE_END = 'end' '\n'
188 * ACTION_RANGE_STATE = FILENAME '\n'
190 * ACTION_BLOCK_RANGE = ACTION_RANGE_START [WS ACTION_RANGE_STATE]+ WS ACTION_RANGE_END
191 * ACTION_BLOCK = ACTION_BLOCK_START [WS ACTION_TYPE*] [ [WS ACTION_STATE]+3 | [WS ACTION_BLOCK_RANGE]+1 ] ACTION_BLOCK_END
192 * CONFIG_FILE_CONTENTS = DIR [ACTION_BLOCK]+
197 * OSD menu position and picture type defines
200 #define OSD_ALIGN_LEFT 0x1
201 #define OSD_ALIGN_RIGHT 0x2
202 #define OSD_ALIGN_TOP 0x4
203 #define OSD_ALIGN_BOTTOM 0x8
205 #define OSD_HOR_SLIDER 1
206 #define OSD_VERT_SLIDER 2
208 #define OSD_PLAY_ICON 1
209 #define OSD_PAUSE_ICON 2
210 #define OSD_SPEAKER_ICON 3
211 #define OSD_MUTE_ICON 4
216 * A text style is used to specify the formatting of text.
217 * A font renderer can use the supplied information to render the
222 char * psz_fontname; /**< The name of the font */
223 int i_font_size; /**< The font size in pixels */
224 int i_font_color; /**< The color of the text 0xRRGGBB
225 (native endianness) */
226 int i_font_alpha; /**< The transparency of the text.
227 0x00 is fully opaque,
228 0xFF fully transparent */
229 int i_style_flags; /**< Formatting style flags */
230 int i_outline_color; /**< The color of the outline 0xRRGGBB */
231 int i_outline_alpha; /**< The transparency of the outline.
232 0x00 is fully opaque,
233 0xFF fully transparent */
234 int i_shadow_color; /**< The color of the shadow 0xRRGGBB */
235 int i_shadow_alpha; /**< The transparency of the shadow.
236 0x00 is fully opaque,
237 0xFF fully transparent */
238 int i_background_color;/**< The color of the background 0xRRGGBB */
239 int i_background_alpha;/**< The transparency of the background.
240 0x00 is fully opaque,
241 0xFF fully transparent */
242 int i_karaoke_background_color;/**< Background color for karaoke 0xRRGGBB */
243 int i_karaoke_background_alpha;/**< The transparency of the karaoke bg.
244 0x00 is fully opaque,
245 0xFF fully transparent */
246 int i_outline_width; /**< The width of the outline in pixels */
247 int i_shadow_width; /**< The width of the shadow in pixels */
248 int i_spacing; /**< The spaceing between glyphs in pixels */
251 /* Style flags for \ref text_style_t */
253 #define STYLE_ITALIC 2
254 #define STYLE_OUTLINE 4
255 #define STYLE_SHADOW 8
256 #define STYLE_BACKGROUND 16
257 #define STYLE_UNDERLINE 32
258 #define STYLE_STRIKEOUT 64
260 static const text_style_t default_text_style = { NULL, 22, 0xffffff, 0xff, STYLE_OUTLINE,
261 0x000000, 0xff, 0x000000, 0xff, 0xffffff, 0x80, 0xffffff, 0xff, 1, 0, -1 };
264 * OSD menu button states
266 * Every button has three states, either it is unselected, selected or pressed.
267 * An OSD menu skin can associate images with each state.
269 * OSD_BUTTON_UNSELECT 0
270 * OSD_BUTTON_SELECT 1
271 * OSD_BUTTON_PRESSED 2
273 #define OSD_BUTTON_UNSELECT 0
274 #define OSD_BUTTON_SELECT 1
275 #define OSD_BUTTON_PRESSED 2
280 * The OSD state object holds the state and associated images for a
281 * particular state on the screen. The picture is displayed when this
282 * state is the active state.
286 osd_state_t *p_next; /*< pointer to next state */
287 osd_state_t *p_prev; /*< pointer to previous state */
288 picture_t *p_pic; /*< picture of state */
290 char *psz_state; /*< state name */
291 int i_state; /*< state index */
293 int i_x; /*< x-position of button state image */
294 int i_y; /*< y-position of button state image */
295 int i_width; /*< width of button state image */
296 int i_height; /*< height of button state image */
302 * An OSD Button has different states. Each state has an image for display.
306 osd_button_t *p_next; /*< pointer to next button */
307 osd_button_t *p_prev; /*< pointer to previous button */
308 osd_button_t *p_up; /*< pointer to up button */
309 osd_button_t *p_down; /*< pointer to down button */
311 osd_state_t *p_current_state; /*< pointer to current state image */
312 osd_state_t *p_states; /*< doubly linked list of states */
313 picture_t *p_feedback; /*< feedback picture */
315 char *psz_name; /*< name of button */
317 /* These member should probably be a struct hotkey */
318 char *psz_action; /*< hotkey action name on button*/
319 char *psz_action_down; /*< hotkey action name on range buttons
320 for command "menu down" */
321 /* end of hotkey specifics */
323 int i_x; /*< x-position of button visible state image */
324 int i_y; /*< y-position of button visible state image */
325 int i_width; /*< width of button visible state image */
326 int i_height; /*< height of button visible state image */
328 /* range style button */
329 bool b_range; /*< button should be interpreted as range */
330 int i_ranges; /*< number of states */
336 * The images that make up an OSD menu can be created in such away that
337 * they contain all buttons in the same picture, with the selected one
338 * highlighted or being a concatenation of all the seperate images. The
339 * first case is the default.
341 * To change the default style the keyword 'style' should be set to 'concat'.
344 #define OSD_MENU_STYLE_SIMPLE 0x0
345 #define OSD_MENU_STYLE_CONCAT 0x1
348 * OSD Menu State object
350 * Represents the current state as displayed.
352 /* Represent the menu state */
353 struct osd_menu_state_t
355 int i_x; /*< x position of spu region */
356 int i_y; /*< y position of spu region */
357 int i_width; /*< width of spu region */
358 int i_height; /*< height of spu region */
360 picture_t *p_pic; /*< pointer to picture to display */
361 osd_button_t *p_visible; /*< shortcut to visible button */
363 bool b_menu_visible; /*< menu currently visible? */
364 bool b_update; /*< update OSD Menu when true */
366 /* quick hack to volume state. */
367 osd_button_t *p_volume; /*< pointer to volume range object. */
373 * The main OSD Menu object, which holds a linked list to all buttons
374 * and images that defines the menu. The p_state variable represents the
375 * current state of the OSD Menu.
381 int i_x; /*< x-position of OSD Menu on the video screen */
382 int i_y; /*< y-position of OSD Menu on the video screen */
383 int i_width; /*< width of OSD Menu on the video screen */
384 int i_height; /*< height of OSD Menu on the video screen */
385 int i_style; /*< style of spu region generation */
386 int i_position; /*< display position */
388 char *psz_path; /*< directory where OSD menu images are stored */
389 osd_button_t *p_button; /*< doubly linked list of buttons */
390 osd_menu_state_t *p_state; /*< current state of OSD menu */
392 /* quick link in the linked list. */
393 osd_button_t *p_last_button; /*< pointer to last button in the list */
396 module_t *p_parser; /*< pointer to parser module */
397 char *psz_file; /*< Config file name */
398 image_handler_t *p_image; /*< handler to image loading and conversion libraries */
402 * Initialize an osd_menu_t object
404 * This functions has to be called before any call to other osd_menu_t*
405 * functions. It creates the osd_menu object and holds a pointer to it
406 * during its lifetime.
408 VLC_EXPORT( osd_menu_t *, __osd_MenuCreate, ( vlc_object_t *, const char * ) );
411 * Delete the osd_menu_t object
413 * This functions has to be called to release the associated module and
414 * memory for the osdmenu. After return of this function the pointer to
415 * osd_menu_t* is invalid.
417 VLC_EXPORT( void, __osd_MenuDelete, ( vlc_object_t *, osd_menu_t * ) );
419 #define osd_MenuCreate(object,file) __osd_MenuCreate( VLC_OBJECT(object), file )
420 #define osd_MenuDelete(object,osd) __osd_MenuDelete( VLC_OBJECT(object), osd )
423 * Find OSD Menu button at position x,y
425 VLC_EXPORT( osd_button_t *, __osd_ButtonFind, ( vlc_object_t *p_this,
426 int, int, int, int, int, int ) );
428 #define osd_ButtonFind(object,x,y,h,w,sh,sw) __osd_ButtonFind(object,x,y,h,w,sh,sw)
431 * Select the button provided as the new active button
433 VLC_EXPORT( void, __osd_ButtonSelect, ( vlc_object_t *, osd_button_t *) );
435 #define osd_ButtonSelect(object,button) __osd_ButtonSelect(object,button)
440 * Show the OSD menu on the video output or mux it into the stream.
441 * Every change to the OSD menu will now be visible in the output. An output
442 * can be a video output window or a stream (\see stream output)
444 VLC_EXPORT( void, __osd_MenuShow, ( vlc_object_t * ) );
449 * Stop showing the OSD menu on the video output or mux it into the stream.
451 VLC_EXPORT( void, __osd_MenuHide, ( vlc_object_t * ) );
454 * Activate the action of this OSD menu item.
456 * The rc interface command "menu select" triggers the sending of an
457 * hotkey action to the hotkey interface. The hotkey that belongs to
458 * the current highlighted OSD menu item will be used.
460 VLC_EXPORT( void, __osd_MenuActivate, ( vlc_object_t * ) );
462 #define osd_MenuShow(object) __osd_MenuShow( VLC_OBJECT(object) )
463 #define osd_MenuHide(object) __osd_MenuHide( VLC_OBJECT(object) )
464 #define osd_MenuActivate(object) __osd_MenuActivate( VLC_OBJECT(object) )
469 * Select the next OSD menu item to be highlighted.
470 * Note: The actual position on screen of the menu item is determined by
471 * the OSD menu configuration file.
473 VLC_EXPORT( void, __osd_MenuNext, ( vlc_object_t * ) );
476 * Previous OSD menu item
478 * Select the previous OSD menu item to be highlighted.
479 * Note: The actual position on screen of the menu item is determined by
480 * the OSD menu configuration file.
482 VLC_EXPORT( void, __osd_MenuPrev, ( vlc_object_t * ) );
485 * OSD menu item above
487 * Select the OSD menu item above the current item to be highlighted.
488 * Note: The actual position on screen of the menu item is determined by
489 * the OSD menu configuration file.
491 VLC_EXPORT( void, __osd_MenuUp, ( vlc_object_t * ) );
494 * OSD menu item below
496 * Select the next OSD menu item below the current item to be highlighted.
497 * Note: The actual position on screen of the menu item is determined by
498 * the OSD menu configuration file.
500 VLC_EXPORT( void, __osd_MenuDown, ( vlc_object_t * ) );
502 #define osd_MenuNext(object) __osd_MenuNext( VLC_OBJECT(object) )
503 #define osd_MenuPrev(object) __osd_MenuPrev( VLC_OBJECT(object) )
504 #define osd_MenuUp(object) __osd_MenuUp( VLC_OBJECT(object) )
505 #define osd_MenuDown(object) __osd_MenuDown( VLC_OBJECT(object) )
508 * Display the audio volume bitmap.
510 * Display the correct audio volume bitmap that corresponds to the
511 * current Audio Volume setting.
513 VLC_EXPORT( void, __osd_Volume, ( vlc_object_t * ) );
515 #define osd_Volume(object) __osd_Volume( VLC_OBJECT(object) )
518 * Retrieve a non modifyable pointer to the OSD Menu state
521 static inline const osd_menu_state_t *osd_GetMenuState( osd_menu_t *p_osd )
523 return( p_osd->p_state );
527 * Get the last key press received by the OSD Menu
529 * Returns 0 when no key has been pressed or the value of the key pressed.
531 static inline bool osd_GetKeyPressed( osd_menu_t *p_osd )
533 return( p_osd->p_state->b_update );
537 * Set the key pressed to a value.
539 * Assign a new key value to the last key pressed on the OSD Menu.
541 static inline void osd_SetKeyPressed( vlc_object_t *p_this, int i_value )
546 var_Set( p_this, "key-pressed", val );
550 * Update the OSD Menu visibility flag.
552 * true means OSD Menu should be shown. false means OSD Menu
553 * should not be shown.
555 static inline void osd_SetMenuVisible( osd_menu_t *p_osd, bool b_value )
559 val.b_bool = p_osd->p_state->b_menu_visible = b_value;
560 var_Set( p_osd, "osd-menu-visible", val );
564 * Update the OSD Menu update flag
566 * If the OSD Menu should be updated then set the update flag to
567 * true, else to false.
569 static inline void osd_SetMenuUpdate( osd_menu_t *p_osd, bool b_value )
573 val.b_bool = p_osd->p_state->b_update = b_value;
574 var_Set( p_osd, "osd-menu-update", val );
580 * Functions that provide the textual feedback on the OSD. They are shown
581 * on hotkey commands. The feedback is also part of the osd_button_t
582 * object. The types are declared in the include file include/vlc_osd.h
585 VLC_EXPORT( int, osd_ShowTextRelative, ( spu_t *, int, char *, text_style_t *, int, int, int, mtime_t ) );
586 VLC_EXPORT( int, osd_ShowTextAbsolute, ( spu_t *, int, char *, text_style_t *, int, int, int, mtime_t, mtime_t ) );
587 VLC_EXPORT( void,osd_Message, ( spu_t *, int, char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
590 * Default feedback images
592 * Functions that provide the default OSD feedback images on hotkey
593 * commands. These feedback images are also part of the osd_button_t
594 * object. The types are declared in the include file include/vlc_osd.h
597 VLC_EXPORT( int, osd_Slider, ( vlc_object_t *, spu_t *, int, int, int, int, int, int, short ) );
598 VLC_EXPORT( int, osd_Icon, ( vlc_object_t *, spu_t *, int, int, int, int, int, short ) );
602 /**********************************************************************
603 * Vout text and widget overlays
604 **********************************************************************/
607 * Show text on the video for some time
608 * \param p_vout pointer to the vout the text is to be showed on
609 * \param i_channel Subpicture channel
610 * \param psz_string The text to be shown
611 * \param p_style Pointer to a struct with text style info
612 * \param i_flags flags for alignment and such
613 * \param i_hmargin horizontal margin in pixels
614 * \param i_vmargin vertical margin in pixels
615 * \param i_duration Amount of time the text is to be shown.
617 VLC_EXPORT( int, vout_ShowTextRelative, ( vout_thread_t *, int, char *, text_style_t *, int, int, int, mtime_t ) );
620 * Show text on the video from a given start date to a given end date
621 * \param p_vout pointer to the vout the text is to be showed on
622 * \param i_channel Subpicture channel
623 * \param psz_string The text to be shown
624 * \param p_style Pointer to a struct with text style info
625 * \param i_flags flags for alignment and such
626 * \param i_hmargin horizontal margin in pixels
627 * \param i_vmargin vertical margin in pixels
628 * \param i_start the time when this string is to appear on the video
629 * \param i_stop the time when this string should stop to be displayed
630 * if this is 0 the string will be shown untill the next string
631 * is about to be shown
633 VLC_EXPORT( int, vout_ShowTextAbsolute, ( vout_thread_t *, int, const char *, text_style_t *, int, int, int, mtime_t, mtime_t ) );
636 * Write an informative message at the default location,
637 * for the default duration and only if the OSD option is enabled.
638 * \param p_caller The object that called the function.
639 * \param i_channel Subpicture channel
640 * \param psz_format printf style formatting
642 VLC_EXPORT( void, __vout_OSDMessage, ( vlc_object_t *, int, const char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
645 * Same as __vlc_OSDMessage() but with automatic casting
647 #define vout_OSDMessage( obj, chan, ...) \
648 __vout_OSDMessage( VLC_OBJECT(obj), chan, __VA_ARGS__ )
651 * Display a slider on the video output.
652 * \param p_this The object that called the function.
653 * \param i_channel Subpicture channel
654 * \param i_postion Current position in the slider
655 * \param i_type Types are: OSD_HOR_SLIDER and OSD_VERT_SLIDER.
658 VLC_EXPORT( void, vout_OSDSlider, ( vlc_object_t *, int, int , short ) );
661 * Display an Icon on the video output.
662 * \param p_this The object that called the function.
663 * \param i_channel Subpicture channel
664 * \param i_type Types are: OSD_PLAY_ICON, OSD_PAUSE_ICON, OSD_SPEAKER_ICON, OSD_MUTE_ICON
667 VLC_EXPORT( void, vout_OSDIcon, ( vlc_object_t *, int, short ) );
673 #endif /* _VLC_OSD_H */