include/vlc_osd.h

   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
   6  * $Id$
   7  *
   8  * Authors: Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
   9  *          Gildas Bazin <gbazin@videolan.org>
  10  *
  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>
  14  *
  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.
  19  *
  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.
  24  *
  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  *****************************************************************************/
  29
  30 #if !defined( __LIBVLC__ )
  31   #error You are not libvlc or one of its plugins. You cannot include this file
  32 #endif
  33
  34 #ifndef _VLC_OSD_H
  35 #define _VLC_OSD_H 1
  36
  37 #include "vlc_vout.h"
  38
  39 # ifdef __cplusplus
  40 extern "C" {
  41 # endif
  42
  43 /**********************************************************************
  44  * Base SPU structures
  45  **********************************************************************/
  46 /**
  47  * \defgroup spu Subpicture Unit
  48  * This module describes the programming interface for the subpicture unit.
  49  * It includes functions allowing to create/destroy an spu, create/destroy
  50  * subpictures and render them.
  51  * @{
  52  */
  53
  54 #include <vlc_vout.h>
  55
  56 /**
  57  * Subpicture unit descriptor
  58  */
  59 struct spu_t
  60 {
  61     VLC_COMMON_MEMBERS
  62
  63     vlc_mutex_t  subpicture_lock;                  /**< subpicture heap lock */
  64     subpicture_t p_subpicture[VOUT_MAX_SUBPICTURES];        /**< subpictures */
  65     int i_channel;             /**< number of subpicture channels registered */
  66
  67     filter_t *p_blend;                            /**< alpha blending module */
  68     filter_t *p_text;                              /**< text renderer module */
  69     filter_t *p_scale;                                   /**< scaling module */
  70     bool b_force_crop;               /**< force cropping of subpicture */
  71     int i_crop_x, i_crop_y, i_crop_width, i_crop_height;       /**< cropping */
  72
  73     int i_margin;                        /**< force position of a subpicture */
  74     bool b_force_palette;             /**< force palette of subpicture */
  75     uint8_t palette[4][4];                               /**< forced palette */
  76
  77     int ( *pf_control ) ( spu_t *, int, va_list );
  78
  79     /* Supciture filters */
  80     filter_t *pp_filter[10];
  81     int      i_filter;
  82 };
  83
  84 static inline int spu_vaControl( spu_t *p_spu, int i_query, va_list args )
  85 {
  86     if( p_spu->pf_control )
  87         return p_spu->pf_control( p_spu, i_query, args );
  88     else
  89         return VLC_EGENERIC;
  90 }
  91
  92 static inline int spu_Control( spu_t *p_spu, int i_query, ... )
  93 {
  94     va_list args;
  95     int i_result;
  96
  97     va_start( args, i_query );
  98     i_result = spu_vaControl( p_spu, i_query, args );
  99     va_end( args );
 100     return i_result;
 101 }
 102
 103 enum spu_query_e
 104 {
 105     SPU_CHANNEL_REGISTER,         /* arg1= int *   res=    */
 106     SPU_CHANNEL_CLEAR             /* arg1= int     res=    */
 107 };
 108
 109 #define spu_Create(a) __spu_Create(VLC_OBJECT(a))
 110 VLC_EXPORT( spu_t *, __spu_Create, ( vlc_object_t * ) );
 111 VLC_EXPORT( int, spu_Init, ( spu_t * ) );
 112 VLC_EXPORT( void, spu_Destroy, ( spu_t * ) );
 113 void spu_Attach( spu_t *, vlc_object_t *, bool );
 114
 115 VLC_EXPORT( subpicture_t *, spu_CreateSubpicture, ( spu_t * ) );
 116 VLC_EXPORT( void, spu_DestroySubpicture, ( spu_t *, subpicture_t * ) );
 117 VLC_EXPORT( void, spu_DisplaySubpicture, ( spu_t *, subpicture_t * ) );
 118
 119 #define spu_CreateRegion(a,b) __spu_CreateRegion(VLC_OBJECT(a),b)
 120 VLC_EXPORT( subpicture_region_t *,__spu_CreateRegion, ( vlc_object_t *, video_format_t * ) );
 121 #define spu_MakeRegion(a,b,c) __spu_MakeRegion(VLC_OBJECT(a),b,c)
 122 VLC_EXPORT( subpicture_region_t *,__spu_MakeRegion, ( vlc_object_t *, video_format_t *, picture_t * ) );
 123 #define spu_DestroyRegion(a,b) __spu_DestroyRegion(VLC_OBJECT(a),b)
 124 VLC_EXPORT( void, __spu_DestroyRegion, ( vlc_object_t *, subpicture_region_t * ) );
 125 VLC_EXPORT( subpicture_t *, spu_SortSubpictures, ( spu_t *, mtime_t, bool ) );
 126 VLC_EXPORT( void, spu_RenderSubpictures, ( spu_t *,  video_format_t *, picture_t *, picture_t *, subpicture_t *, int, int ) );
 127
 128 /** @}*/
 129
 130 /**********************************************************************
 131  * OSD Menu
 132  **********************************************************************/
 133 /**
 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.
 139  *
 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:
 145  *
 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
 149  *
 150  * An example for local usage of the OSD menu is:
 151  *
 152  *  vlc dvdsimple:///dev/dvd --extraintf rc
 153  *  --sub-filter osdmenu
 154  *  --osdmenu-file=share/osdmenu/dvd.cfg
 155  *
 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.
 162  *
 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.
 166  *
 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".
 170  * @{
 171  */
 172
 173 /**
 174  * \brief The OSD Menu configuration file format.
 175  *
 176  * The configuration file syntax is very basic and so is its parser. See the
 177  * BNF formal representation below:
 178  *
 179  * The keywords FILENAME and PATHNAME represent the filename and pathname
 180  * specification that is valid for the Operating System VLC is compiled for.
 181  *
 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.
 184  *
 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', '-' ]+
 192  *
 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'
 200  *
 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]+
 204  *
 205  */
 206
 207 /**
 208  * OSD menu position and picture type defines
 209  */
 210
 211 #define OSD_ALIGN_LEFT 0x1
 212 #define OSD_ALIGN_RIGHT 0x2
 213 #define OSD_ALIGN_TOP 0x4
 214 #define OSD_ALIGN_BOTTOM 0x8
 215
 216 #define OSD_HOR_SLIDER 1
 217 #define OSD_VERT_SLIDER 2
 218
 219 #define OSD_PLAY_ICON 1
 220 #define OSD_PAUSE_ICON 2
 221 #define OSD_SPEAKER_ICON 3
 222 #define OSD_MUTE_ICON 4
 223
 224 /**
 225  * Text style
 226  *
 227  * A text style is used to specify the formatting of text.
 228  * A font renderer can use the supplied information to render the
 229  * text specified.
 230  */
 231 struct text_style_t
 232 {
 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 */
 260 };
 261
 262 /* Style flags for \ref text_style_t */
 263 #define STYLE_BOLD        1
 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
 270
 271 static const text_style_t default_text_style = { NULL, 22, 0xffffff, 0xff, STYLE_OUTLINE,
 272                 0x000000, 0xff, 0x000000, 0xff, 0xffffff, 0x80, 0xffffff, 0xff, 1, 0, -1 };
 273
 274 /**
 275  * OSD menu button states
 276  *
 277  * Every button has three states, either it is unselected, selected or pressed.
 278  * An OSD menu skin can associate images with each state.
 279  *
 280  *  OSD_BUTTON_UNSELECT 0
 281  *  OSD_BUTTON_SELECT   1
 282  *  OSD_BUTTON_PRESSED  2
 283  */
 284 #define OSD_BUTTON_UNSELECT 0
 285 #define OSD_BUTTON_SELECT   1
 286 #define OSD_BUTTON_PRESSED  2
 287
 288 /**
 289  * OSD State object
 290  *
 291  * The OSD state object holds the state and associated images for a
 292  * particular state on the screen. The picture is displayed when this
 293  * state is the active state.
 294  */
 295 struct osd_state_t
 296 {
 297     osd_state_t *p_next;    /*< pointer to next state */
 298     osd_state_t *p_prev;    /*< pointer to previous state */
 299     picture_t   *p_pic;     /*< picture of state */
 300
 301     char        *psz_state; /*< state name */
 302     int          i_state;   /*< state index */
 303
 304     int     i_x;            /*< x-position of button state image */
 305     int     i_y;            /*< y-position of button state image */
 306     int     i_width;        /*< width of button state image */
 307     int     i_height;       /*< height of button state image */
 308 };
 309
 310 /**
 311  * OSD Button object
 312  *
 313  * An OSD Button has different states. Each state has an image for display.
 314  */
 315 struct osd_button_t
 316 {
 317     osd_button_t *p_next;   /*< pointer to next button */
 318     osd_button_t *p_prev;   /*< pointer to previous button */
 319     osd_button_t *p_up;     /*< pointer to up button */
 320     osd_button_t *p_down;   /*< pointer to down button */
 321
 322     osd_state_t *p_current_state; /*< pointer to current state image */
 323     osd_state_t *p_states; /*< doubly linked list of states */
 324     picture_t   *p_feedback; /*< feedback picture */
 325
 326     char    *psz_name;     /*< name of button */
 327
 328     /* These member should probably be a struct hotkey */
 329     char    *psz_action;      /*< hotkey action name on button*/
 330     char    *psz_action_down; /*< hotkey action name on range buttons
 331                                   for command "menu down" */
 332     /* end of hotkey specifics */
 333
 334     int     i_x;            /*< x-position of button visible state image */
 335     int     i_y;            /*< y-position of button visible state image */
 336     int     i_width;        /*< width of button visible state image */
 337     int     i_height;       /*< height of button visible state image */
 338
 339     /* range style button */
 340     bool   b_range;    /*< button should be interpreted as range */
 341     int          i_ranges;   /*< number of states */
 342 };
 343
 344 /**
 345  * OSD Menu Style
 346  *
 347  * The images that make up an OSD menu can be created in such away that
 348  * they contain all buttons in the same picture, with the selected one
 349  * highlighted or being a concatenation of all the seperate images. The
 350  * first case is the default.
 351  *
 352  * To change the default style the keyword 'style' should be set to 'concat'.
 353  */
 354
 355 #define OSD_MENU_STYLE_SIMPLE 0x0
 356 #define OSD_MENU_STYLE_CONCAT 0x1
 357
 358 /**
 359  * OSD Menu State object
 360  *
 361  * Represents the current state as displayed.
 362  */
 363 /* Represent the menu state */
 364 struct osd_menu_state_t
 365 {
 366     int     i_x;        /*< x position of spu region */
 367     int     i_y;        /*< y position of spu region */
 368     int     i_width;    /*< width of spu region */
 369     int     i_height;   /*< height of spu region */
 370
 371     picture_t    *p_pic;  /*< pointer to picture to display */
 372     osd_button_t *p_visible; /*< shortcut to visible button */
 373
 374     bool b_menu_visible; /*< menu currently visible? */
 375     bool b_update;       /*< update OSD Menu when true */
 376
 377     /* quick hack to volume state. */
 378     osd_button_t *p_volume; /*< pointer to volume range object. */
 379 };
 380
 381 /**
 382  * OSD Menu object
 383  *
 384  * The main OSD Menu object, which holds a linked list to all buttons
 385  * and images that defines the menu. The p_state variable represents the
 386  * current state of the OSD Menu.
 387  */
 388 struct osd_menu_t
 389 {
 390     VLC_COMMON_MEMBERS
 391
 392     int     i_x;        /*< x-position of OSD Menu on the video screen */
 393     int     i_y;        /*< y-position of OSD Menu on the video screen */
 394     int     i_width;    /*< width of OSD Menu on the video screen */
 395     int     i_height;   /*< height of OSD Menu on the video screen */
 396     int     i_style;    /*< style of spu region generation */
 397     int     i_position; /*< display position */
 398
 399     char             *psz_path;  /*< directory where OSD menu images are stored */
 400     osd_button_t     *p_button;  /*< doubly linked list of buttons */
 401     osd_menu_state_t *p_state;   /*< current state of OSD menu */
 402
 403     /* quick link in the linked list. */
 404     osd_button_t  *p_last_button; /*< pointer to last button in the list */
 405
 406     /* misc parser */
 407     module_t        *p_parser;  /*< pointer to parser module */
 408     char            *psz_file;  /*< Config file name */
 409     image_handler_t *p_image;   /*< handler to image loading and conversion libraries */
 410 };
 411
 412 /**
 413  * Initialize an osd_menu_t object
 414  *
 415  * This functions has to be called before any call to other osd_menu_t*
 416  * functions. It creates the osd_menu object and holds a pointer to it
 417  * during its lifetime.
 418  */
 419 VLC_EXPORT( osd_menu_t *, __osd_MenuCreate, ( vlc_object_t *, const char * ) );
 420
 421 /**
 422  * Delete the osd_menu_t object
 423  *
 424  * This functions has to be called to release the associated module and
 425  * memory for the osdmenu. After return of this function the pointer to
 426  * osd_menu_t* is invalid.
 427  */
 428 VLC_EXPORT( void, __osd_MenuDelete, ( vlc_object_t *, osd_menu_t * ) );
 429
 430 #define osd_MenuCreate(object,file) __osd_MenuCreate( VLC_OBJECT(object), file )
 431 #define osd_MenuDelete(object,osd)  __osd_MenuDelete( VLC_OBJECT(object), osd )
 432
 433 /**
 434  * Find OSD Menu button at position x,y
 435  */
 436 VLC_EXPORT( osd_button_t *, __osd_ButtonFind, ( vlc_object_t *p_this,
 437      int, int, int, int, int, int ) );
 438
 439 #define osd_ButtonFind(object,x,y,h,w,sh,sw)  __osd_ButtonFind(object,x,y,h,w,sh,sw)
 440
 441 /**
 442  * Select the button provided as the new active button
 443  */
 444 VLC_EXPORT( void, __osd_ButtonSelect, ( vlc_object_t *, osd_button_t *) );
 445
 446 #define osd_ButtonSelect(object,button) __osd_ButtonSelect(object,button)
 447
 448 /**
 449  * Show the OSD menu.
 450  *
 451  * Show the OSD menu on the video output or mux it into the stream.
 452  * Every change to the OSD menu will now be visible in the output. An output
 453  * can be a video output window or a stream (\see stream output)
 454  */
 455 VLC_EXPORT( void, __osd_MenuShow, ( vlc_object_t * ) );
 456
 457 /**
 458  * Hide the OSD menu.
 459  *
 460  * Stop showing the OSD menu on the video output or mux it into the stream.
 461  */
 462 VLC_EXPORT( void, __osd_MenuHide, ( vlc_object_t * ) );
 463
 464 /**
 465  * Activate the action of this OSD menu item.
 466  *
 467  * The rc interface command "menu select" triggers the sending of an
 468  * hotkey action to the hotkey interface. The hotkey that belongs to
 469  * the current highlighted OSD menu item will be used.
 470  */
 471 VLC_EXPORT( void, __osd_MenuActivate,   ( vlc_object_t * ) );
 472
 473 #define osd_MenuShow(object) __osd_MenuShow( VLC_OBJECT(object) )
 474 #define osd_MenuHide(object) __osd_MenuHide( VLC_OBJECT(object) )
 475 #define osd_MenuActivate(object)   __osd_MenuActivate( VLC_OBJECT(object) )
 476
 477 /**
 478  * Next OSD menu item
 479  *
 480  * Select the next OSD menu item to be highlighted.
 481  * Note: The actual position on screen of the menu item is determined by
 482  * the OSD menu configuration file.
 483  */
 484 VLC_EXPORT( void, __osd_MenuNext, ( vlc_object_t * ) );
 485
 486 /**
 487  * Previous OSD menu item
 488  *
 489  * Select the previous OSD menu item to be highlighted.
 490  * Note: The actual position on screen of the menu item is determined by
 491  * the OSD menu configuration file.
 492  */
 493 VLC_EXPORT( void, __osd_MenuPrev, ( vlc_object_t * ) );
 494
 495 /**
 496  * OSD menu item above
 497  *
 498  * Select the OSD menu item above the current item to be highlighted.
 499  * Note: The actual position on screen of the menu item is determined by
 500  * the OSD menu configuration file.
 501  */
 502 VLC_EXPORT( void, __osd_MenuUp,   ( vlc_object_t * ) );
 503
 504 /**
 505  * OSD menu item below
 506  *
 507  * Select the next OSD menu item below the current item to be highlighted.
 508  * Note: The actual position on screen of the menu item is determined by
 509  * the OSD menu configuration file.
 510  */
 511 VLC_EXPORT( void, __osd_MenuDown, ( vlc_object_t * ) );
 512
 513 #define osd_MenuNext(object) __osd_MenuNext( VLC_OBJECT(object) )
 514 #define osd_MenuPrev(object) __osd_MenuPrev( VLC_OBJECT(object) )
 515 #define osd_MenuUp(object)   __osd_MenuUp( VLC_OBJECT(object) )
 516 #define osd_MenuDown(object) __osd_MenuDown( VLC_OBJECT(object) )
 517
 518 /**
 519  * Display the audio volume bitmap.
 520  *
 521  * Display the correct audio volume bitmap that corresponds to the
 522  * current Audio Volume setting.
 523  */
 524 VLC_EXPORT( void, __osd_Volume, ( vlc_object_t * ) );
 525
 526 #define osd_Volume(object)     __osd_Volume( VLC_OBJECT(object) )
 527
 528 /**
 529  * Retrieve a non modifyable pointer to the OSD Menu state
 530  *
 531  */
 532 static inline const osd_menu_state_t *osd_GetMenuState( osd_menu_t *p_osd )
 533 {
 534     return( p_osd->p_state );
 535 }
 536
 537 /**
 538  * Get the last key press received by the OSD Menu
 539  *
 540  * Returns 0 when no key has been pressed or the value of the key pressed.
 541  */
 542 static inline bool osd_GetKeyPressed( osd_menu_t *p_osd )
 543 {
 544     return( p_osd->p_state->b_update );
 545 }
 546
 547 /**
 548  * Set the key pressed to a value.
 549  *
 550  * Assign a new key value to the last key pressed on the OSD Menu.
 551  */
 552 static inline void osd_SetKeyPressed( vlc_object_t *p_this, int i_value )
 553 {
 554     vlc_value_t val;
 555
 556     val.i_int = i_value;
 557     var_Set( p_this, "key-pressed", val );
 558 }
 559
 560 /**
 561  * Update the OSD Menu visibility flag.
 562  *
 563  * true means OSD Menu should be shown. false means OSD Menu
 564  * should not be shown.
 565  */
 566 static inline void osd_SetMenuVisible( osd_menu_t *p_osd, bool b_value )
 567 {
 568     vlc_value_t val;
 569
 570     val.b_bool = p_osd->p_state->b_menu_visible = b_value;
 571     var_Set( p_osd, "osd-menu-visible", val );
 572 }
 573
 574 /**
 575  * Update the OSD Menu update flag
 576  *
 577  * If the OSD Menu should be updated then set the update flag to
 578  * true, else to false.
 579  */
 580 static inline void osd_SetMenuUpdate( osd_menu_t *p_osd, bool b_value )
 581 {
 582     vlc_value_t val;
 583
 584     val.b_bool = p_osd->p_state->b_update = b_value;
 585     var_Set( p_osd, "osd-menu-update", val );
 586 }
 587
 588 /**
 589  * Textual feedback
 590  *
 591  * Functions that provide the textual feedback on the OSD. They are shown
 592  * on hotkey commands. The feedback is also part of the osd_button_t
 593  * object. The types are declared in the include file include/vlc_osd.h
 594  * @see vlc_osd.h
 595  */
 596 VLC_EXPORT( int, osd_ShowTextRelative, ( spu_t *, int, char *, text_style_t *, int, int, int, mtime_t ) );
 597 VLC_EXPORT( int, osd_ShowTextAbsolute, ( spu_t *, int, char *, text_style_t *, int, int, int, mtime_t, mtime_t ) );
 598 VLC_EXPORT( void,osd_Message, ( spu_t *, int, char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
 599
 600 /**
 601  * Default feedback images
 602  *
 603  * Functions that provide the default OSD feedback images on hotkey
 604  * commands. These feedback images are also part of the osd_button_t
 605  * object. The types are declared in the include file include/vlc_osd.h
 606  * @see vlc_osd.h
 607  */
 608 VLC_EXPORT( int, osd_Slider, ( vlc_object_t *, spu_t *, int, int, int, int, int, int, short ) );
 609 VLC_EXPORT( int, osd_Icon, ( vlc_object_t *, spu_t *, int, int, int, int, int, short ) );
 610
 611 /** @} */
 612
 613 /**********************************************************************
 614  * Vout text and widget overlays
 615  **********************************************************************/
 616
 617 /**
 618  * Show text on the video for some time
 619  * \param p_vout pointer to the vout the text is to be showed on
 620  * \param i_channel Subpicture channel
 621  * \param psz_string The text to be shown
 622  * \param p_style Pointer to a struct with text style info
 623  * \param i_flags flags for alignment and such
 624  * \param i_hmargin horizontal margin in pixels
 625  * \param i_vmargin vertical margin in pixels
 626  * \param i_duration Amount of time the text is to be shown.
 627  */
 628 VLC_EXPORT( int, vout_ShowTextRelative, ( vout_thread_t *, int, char *, text_style_t *, int, int, int, mtime_t ) );
 629
 630 /**
 631  * Show text on the video from a given start date to a given end date
 632  * \param p_vout pointer to the vout the text is to be showed on
 633  * \param i_channel Subpicture channel
 634  * \param psz_string The text to be shown
 635  * \param p_style Pointer to a struct with text style info
 636  * \param i_flags flags for alignment and such
 637  * \param i_hmargin horizontal margin in pixels
 638  * \param i_vmargin vertical margin in pixels
 639  * \param i_start the time when this string is to appear on the video
 640  * \param i_stop the time when this string should stop to be displayed
 641  *               if this is 0 the string will be shown untill the next string
 642  *               is about to be shown
 643  */
 644 VLC_EXPORT( int, vout_ShowTextAbsolute, ( vout_thread_t *, int, const char *, text_style_t *, int, int, int, mtime_t, mtime_t ) );
 645
 646 /**
 647  * Write an informative message at the default location,
 648  * for the default duration and only if the OSD option is enabled.
 649  * \param p_caller The object that called the function.
 650  * \param i_channel Subpicture channel
 651  * \param psz_format printf style formatting
 652  **/
 653 VLC_EXPORT( void,  __vout_OSDMessage, ( vlc_object_t *, int, const char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
 654
 655 /**
 656  * Same as __vlc_OSDMessage() but with automatic casting
 657  */
 658 #define vout_OSDMessage( obj, chan, ...) \
 659       __vout_OSDMessage( VLC_OBJECT(obj), chan, __VA_ARGS__ )
 660
 661 /**
 662  * Display a slider on the video output.
 663  * \param p_this    The object that called the function.
 664  * \param i_channel Subpicture channel
 665  * \param i_postion Current position in the slider
 666  * \param i_type    Types are: OSD_HOR_SLIDER and OSD_VERT_SLIDER.
 667  * @see vlc_osd.h
 668  */
 669 VLC_EXPORT( void, vout_OSDSlider, ( vlc_object_t *, int, int , short ) );
 670
 671 /**
 672  * Display an Icon on the video output.
 673  * \param p_this    The object that called the function.
 674  * \param i_channel Subpicture channel
 675  * \param i_type    Types are: OSD_PLAY_ICON, OSD_PAUSE_ICON, OSD_SPEAKER_ICON, OSD_MUTE_ICON
 676  * @see vlc_osd.h
 677  */
 678 VLC_EXPORT( void, vout_OSDIcon, ( vlc_object_t *, int, short ) );
 679
 680 # ifdef __cplusplus
 681 }
 682 # endif
 683
 684 #endif /* _VLC_OSD_H */