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 #ifndef VLC_OSD_H
  31 #define VLC_OSD_H 1
  32
  33 #include "vlc_vout.h"
  34
  35 # ifdef __cplusplus
  36 extern "C" {
  37 # endif
  38
  39 /**
  40  * \file
  41  * This file defines SPU subpicture and OSD functions and object types.
  42  */
  43
  44 /**********************************************************************
  45  * Base SPU structures
  46  **********************************************************************/
  47 /**
  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.
  52  * @{
  53  */
  54
  55 #include <vlc_vout.h>
  56
  57 typedef struct spu_private_t spu_private_t;
  58
  59 /**
  60  * Subpicture unit descriptor
  61  */
  62 struct spu_t
  63 {
  64     VLC_COMMON_MEMBERS
  65
  66     int (*pf_control)( spu_t *, int, va_list );
  67
  68     spu_private_t *p;
  69 };
  70
  71 enum spu_query_e
  72 {
  73     SPU_CHANNEL_REGISTER,         /* arg1= int *   res=    */
  74     SPU_CHANNEL_CLEAR             /* arg1= int     res=    */
  75 };
  76
  77 static inline int spu_vaControl( spu_t *p_spu, int i_query, va_list args )
  78 {
  79     if( p_spu->pf_control )
  80         return p_spu->pf_control( p_spu, i_query, args );
  81     else
  82         return VLC_EGENERIC;
  83 }
  84
  85 static inline int spu_Control( spu_t *p_spu, int i_query, ... )
  86 {
  87     va_list args;
  88     int i_result;
  89
  90     va_start( args, i_query );
  91     i_result = spu_vaControl( p_spu, i_query, args );
  92     va_end( args );
  93     return i_result;
  94 }
  95
  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 );
 101
 102 /**
 103  * This function sends a subpicture to the spu_t core.
 104  *
 105  * You cannot use the provided subpicture anymore. The spu_t core
 106  * will destroy it at its convenience.
 107  */
 108 VLC_EXPORT( void, spu_DisplaySubpicture, ( spu_t *, subpicture_t * ) );
 109
 110 /**
 111  * This function asks the spu_t core a list of subpictures to display.
 112  *
 113  * The returned list can only be used by spu_RenderSubpictures.
 114  */
 115 VLC_EXPORT( subpicture_t *, spu_SortSubpictures, ( spu_t *, mtime_t display_date, bool b_paused, bool b_subtitle_only ) );
 116
 117 /**
 118  * This function renders a list of subpicture_t on the provided picture.
 119  *
 120  * \param p_fmt_dst is the format of the destination picture.
 121  * \param p_fmt_src is the format of the original(source) video.
 122  */
 123 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, bool b_paused ) );
 124
 125 /** @}*/
 126
 127 /**********************************************************************
 128  * OSD Menu
 129  **********************************************************************/
 130 /**
 131  * \defgroup osdmenu OSD Menu
 132  * The OSD menu core creates the OSD menu structure in memory. It parses a
 133  * configuration file that defines all elements that are part of the menu. The
 134  * core also handles all actions and menu structure updates on behalf of video
 135  * subpicture filters.
 136  *
 137  * The file modules/video_filters/osdmenu.c implements a subpicture filter that
 138  * specifies the final information on positioning of the current state image.
 139  * A subpicture filter is called each time a video picture has to be rendered,
 140  * it also gives a start and end date to the subpicture. The subpicture can be
 141  * streamed if used inside a transcoding command. For example:
 142  *
 143  *  vlc dvdsimple:///dev/dvd --extraintf rc
 144  *  --sout='#transcode{osd}:std{access=udp,mux=ts,dst=dest_ipaddr}'
 145  *  --osdmenu-file=share/osdmenu/dvd.cfg
 146  *
 147  * An example for local usage of the OSD menu is:
 148  *
 149  *  vlc dvdsimple:///dev/dvd --extraintf rc
 150  *  --sub-filter osdmenu
 151  *  --osdmenu-file=share/osdmenu/dvd.cfg
 152  *
 153  * Each OSD menu element, called "action", defines a hotkey action. Each action
 154  * can have several states (unselect, select, pressed). Each state has an image
 155  * that represents the state visually. The commands "menu right", "menu left",
 156  * "menu up" and "menu down" are used to navigate through the OSD menu structure.
 157  * The commands "menu on" or "menu show" and "menu off" or "menu hide" respectively
 158  * show and hide the OSD menu subpictures.
 159  *
 160  * There is one special element called "range". A range is an arbritary range
 161  * of state images that can be browsed using "menu up" and "menu down" commands
 162  * on the rc interface.
 163  *
 164  * The OSD menu configuration file uses a very simple syntax and basic parser.
 165  * A configuration file has the ".cfg".
 166  * An example is "share/osdmenu/dvd256.cfg".
 167  * @{
 168  */
 169
 170 /**
 171  * \brief The OSD Menu configuration file format.
 172  *
 173  * The configuration file syntax is very basic and so is its parser. See the
 174  * BNF formal representation below:
 175  *
 176  * The keywords FILENAME and PATHNAME represent the filename and pathname
 177  * specification that is valid for the Operating System VLC is compiled for.
 178  *
 179  * The hotkey actions that are supported by VLC are documented in the file
 180  * src/libvlc. The file include/vlc_keys.h defines some hotkey internals.
 181  *
 182  * CONFIG_FILE = FILENAME '.cfg'
 183  * WS = [ ' ' | '\t' ]+
 184  * OSDMENU_PATH = PATHNAME
 185  * DIR = 'dir' WS OSDMENU_PATH '\n'
 186  * STYLE = 'style' [ 'default' | 'concat' ] '\n'
 187  * STATE = [ 'unselect' | 'select' | 'pressed' ]
 188  * HOTKEY_ACTION = 'key-' [ 'a' .. 'z', 'A' .. 'Z', '-' ]+
 189  *
 190  * ACTION_TYPE        = 'type' 'volume' '\n'
 191  * ACTION_BLOCK_START = 'action' WS HOTKEY_ACTION WS '('POS','POS')' '\n'
 192  * ACTION_BLOCK_END   = 'end' '\n'
 193  * ACTION_STATE       = STATE WS FILENAME '\n'
 194  * ACTION_RANGE_START = 'range' WS HOTKEY_ACTION WS DEFAULT_INDEX '\n'
 195  * ACTION_RANGE_END   = 'end' '\n'
 196  * ACTION_RANGE_STATE = FILENAME '\n'
 197  *
 198  * ACTION_BLOCK_RANGE = ACTION_RANGE_START [WS ACTION_RANGE_STATE]+ WS ACTION_RANGE_END
 199  * ACTION_BLOCK = ACTION_BLOCK_START [WS ACTION_TYPE*] [ [WS ACTION_STATE]+3 | [WS ACTION_BLOCK_RANGE]+1 ] ACTION_BLOCK_END
 200  * CONFIG_FILE_CONTENTS = DIR [ACTION_BLOCK]+
 201  *
 202  */
 203
 204 /**
 205  * OSD menu position and picture type defines
 206  */
 207
 208 #define OSD_ALIGN_LEFT 0x1
 209 #define OSD_ALIGN_RIGHT 0x2
 210 #define OSD_ALIGN_TOP 0x4
 211 #define OSD_ALIGN_BOTTOM 0x8
 212
 213 #define OSD_HOR_SLIDER 1
 214 #define OSD_VERT_SLIDER 2
 215
 216 #define OSD_PLAY_ICON 1
 217 #define OSD_PAUSE_ICON 2
 218 #define OSD_SPEAKER_ICON 3
 219 #define OSD_MUTE_ICON 4
 220
 221 /**
 222  * Text style
 223  *
 224  * A text style is used to specify the formatting of text.
 225  * A font renderer can use the supplied information to render the
 226  * text specified.
 227  */
 228 struct text_style_t
 229 {
 230     char *     psz_fontname;      /**< The name of the font */
 231     int        i_font_size;       /**< The font size in pixels */
 232     int        i_font_color;      /**< The color of the text 0xRRGGBB
 233                                        (native endianness) */
 234     int        i_font_alpha;      /**< The transparency of the text.
 235                                        0x00 is fully opaque,
 236                                        0xFF fully transparent */
 237     int        i_style_flags;     /**< Formatting style flags */
 238     int        i_outline_color;   /**< The color of the outline 0xRRGGBB */
 239     int        i_outline_alpha;   /**< The transparency of the outline.
 240                                        0x00 is fully opaque,
 241                                        0xFF fully transparent */
 242     int        i_shadow_color;    /**< The color of the shadow 0xRRGGBB */
 243     int        i_shadow_alpha;    /**< The transparency of the shadow.
 244                                         0x00 is fully opaque,
 245                                         0xFF fully transparent */
 246     int        i_background_color;/**< The color of the background 0xRRGGBB */
 247     int        i_background_alpha;/**< The transparency of the background.
 248                                        0x00 is fully opaque,
 249                                        0xFF fully transparent */
 250     int        i_karaoke_background_color;/**< Background color for karaoke 0xRRGGBB */
 251     int        i_karaoke_background_alpha;/**< The transparency of the karaoke bg.
 252                                        0x00 is fully opaque,
 253                                        0xFF fully transparent */
 254     int        i_outline_width;   /**< The width of the outline in pixels */
 255     int        i_shadow_width;    /**< The width of the shadow in pixels */
 256     int        i_spacing;         /**< The spaceing between glyphs in pixels */
 257 };
 258
 259 /* Style flags for \ref text_style_t */
 260 #define STYLE_BOLD        1
 261 #define STYLE_ITALIC      2
 262 #define STYLE_OUTLINE     4
 263 #define STYLE_SHADOW      8
 264 #define STYLE_BACKGROUND  16
 265 #define STYLE_UNDERLINE   32
 266 #define STYLE_STRIKEOUT   64
 267
 268 static const text_style_t default_text_style = { NULL, 22, 0xffffff, 0xff, STYLE_OUTLINE,
 269                 0x000000, 0xff, 0x000000, 0xff, 0xffffff, 0x80, 0xffffff, 0xff, 1, 0, -1 };
 270
 271 /**
 272  * OSD menu button states
 273  *
 274  * Every button has three states, either it is unselected, selected or pressed.
 275  * An OSD menu skin can associate images with each state.
 276  *
 277  *  OSD_BUTTON_UNSELECT 0
 278  *  OSD_BUTTON_SELECT   1
 279  *  OSD_BUTTON_PRESSED  2
 280  */
 281 #define OSD_BUTTON_UNSELECT 0
 282 #define OSD_BUTTON_SELECT   1
 283 #define OSD_BUTTON_PRESSED  2
 284
 285 /**
 286  * OSD State object
 287  *
 288  * The OSD state object holds the state and associated images for a
 289  * particular state on the screen. The picture is displayed when this
 290  * state is the active state.
 291  */
 292 struct osd_state_t
 293 {
 294     osd_state_t *p_next;    /*< pointer to next state */
 295     osd_state_t *p_prev;    /*< pointer to previous state */
 296     picture_t   *p_pic;     /*< picture of state */
 297
 298     char        *psz_state; /*< state name */
 299     int          i_state;   /*< state index */
 300
 301     int     i_x;            /*< x-position of button state image */
 302     int     i_y;            /*< y-position of button state image */
 303     int     i_width;        /*< width of button state image */
 304     int     i_height;       /*< height of button state image */
 305 };
 306
 307 /**
 308  * OSD Button object
 309  *
 310  * An OSD Button has different states. Each state has an image for display.
 311  */
 312 struct osd_button_t
 313 {
 314     osd_button_t *p_next;   /*< pointer to next button */
 315     osd_button_t *p_prev;   /*< pointer to previous button */
 316     osd_button_t *p_up;     /*< pointer to up button */
 317     osd_button_t *p_down;   /*< pointer to down button */
 318
 319     osd_state_t *p_current_state; /*< pointer to current state image */
 320     osd_state_t *p_states; /*< doubly linked list of states */
 321     picture_t   *p_feedback; /*< feedback picture */
 322
 323     char    *psz_name;     /*< name of button */
 324
 325     /* These member should probably be a struct hotkey */
 326     char    *psz_action;      /*< hotkey action name on button*/
 327     char    *psz_action_down; /*< hotkey action name on range buttons
 328                                   for command "menu down" */
 329     /* end of hotkey specifics */
 330
 331     int     i_x;            /*< x-position of button visible state image */
 332     int     i_y;            /*< y-position of button visible state image */
 333     int     i_width;        /*< width of button visible state image */
 334     int     i_height;       /*< height of button visible state image */
 335
 336     /* range style button */
 337     bool   b_range;    /*< button should be interpreted as range */
 338     int          i_ranges;   /*< number of states */
 339 };
 340
 341 /**
 342  * OSD Menu Style
 343  *
 344  * The images that make up an OSD menu can be created in such away that
 345  * they contain all buttons in the same picture, with the selected one
 346  * highlighted or being a concatenation of all the seperate images. The
 347  * first case is the default.
 348  *
 349  * To change the default style the keyword 'style' should be set to 'concat'.
 350  */
 351
 352 #define OSD_MENU_STYLE_SIMPLE 0x0
 353 #define OSD_MENU_STYLE_CONCAT 0x1
 354
 355 /**
 356  * OSD Menu State object
 357  *
 358  * Represents the current state as displayed.
 359  */
 360 /* Represent the menu state */
 361 struct osd_menu_state_t
 362 {
 363     int     i_x;        /*< x position of spu region */
 364     int     i_y;        /*< y position of spu region */
 365     int     i_width;    /*< width of spu region */
 366     int     i_height;   /*< height of spu region */
 367
 368     picture_t    *p_pic;  /*< pointer to picture to display */
 369     osd_button_t *p_visible; /*< shortcut to visible button */
 370
 371     bool b_menu_visible; /*< menu currently visible? */
 372     bool b_update;       /*< update OSD Menu when true */
 373
 374     /* quick hack to volume state. */
 375     osd_button_t *p_volume; /*< pointer to volume range object. */
 376 };
 377
 378 /**
 379  * OSD Menu object
 380  *
 381  * The main OSD Menu object, which holds a linked list to all buttons
 382  * and images that defines the menu. The p_state variable represents the
 383  * current state of the OSD Menu.
 384  */
 385 struct osd_menu_t
 386 {
 387     VLC_COMMON_MEMBERS
 388
 389     int     i_x;        /*< x-position of OSD Menu on the video screen */
 390     int     i_y;        /*< y-position of OSD Menu on the video screen */
 391     int     i_width;    /*< width of OSD Menu on the video screen */
 392     int     i_height;   /*< height of OSD Menu on the video screen */
 393     int     i_style;    /*< style of spu region generation */
 394     int     i_position; /*< display position */
 395
 396     char             *psz_path;  /*< directory where OSD menu images are stored */
 397     osd_button_t     *p_button;  /*< doubly linked list of buttons */
 398     osd_menu_state_t *p_state;   /*< current state of OSD menu */
 399
 400     /* quick link in the linked list. */
 401     osd_button_t  *p_last_button; /*< pointer to last button in the list */
 402
 403     /* misc parser */
 404     module_t        *p_parser;  /*< pointer to parser module */
 405     char            *psz_file;  /*< Config file name */
 406     image_handler_t *p_image;   /*< handler to image loading and conversion libraries */
 407 };
 408
 409 /**
 410  * Initialize an osd_menu_t object
 411  *
 412  * This functions has to be called before any call to other osd_menu_t*
 413  * functions. It creates the osd_menu object and holds a pointer to it
 414  * during its lifetime.
 415  */
 416 VLC_EXPORT( osd_menu_t *, __osd_MenuCreate, ( vlc_object_t *, const char * ) );
 417
 418 /**
 419  * Delete the osd_menu_t object
 420  *
 421  * This functions has to be called to release the associated module and
 422  * memory for the osdmenu. After return of this function the pointer to
 423  * osd_menu_t* is invalid.
 424  */
 425 VLC_EXPORT( void, __osd_MenuDelete, ( vlc_object_t *, osd_menu_t * ) );
 426
 427 #define osd_MenuCreate(object,file) __osd_MenuCreate( VLC_OBJECT(object), file )
 428 #define osd_MenuDelete(object,osd)  __osd_MenuDelete( VLC_OBJECT(object), osd )
 429
 430 /**
 431  * Find OSD Menu button at position x,y
 432  */
 433 VLC_EXPORT( osd_button_t *, __osd_ButtonFind, ( vlc_object_t *p_this,
 434      int, int, int, int, int, int ) );
 435
 436 #define osd_ButtonFind(object,x,y,h,w,sh,sw)  __osd_ButtonFind(object,x,y,h,w,sh,sw)
 437
 438 /**
 439  * Select the button provided as the new active button
 440  */
 441 VLC_EXPORT( void, __osd_ButtonSelect, ( vlc_object_t *, osd_button_t *) );
 442
 443 #define osd_ButtonSelect(object,button) __osd_ButtonSelect(object,button)
 444
 445 /**
 446  * Show the OSD menu.
 447  *
 448  * Show the OSD menu on the video output or mux it into the stream.
 449  * Every change to the OSD menu will now be visible in the output. An output
 450  * can be a video output window or a stream (\see stream output)
 451  */
 452 VLC_EXPORT( void, __osd_MenuShow, ( vlc_object_t * ) );
 453
 454 /**
 455  * Hide the OSD menu.
 456  *
 457  * Stop showing the OSD menu on the video output or mux it into the stream.
 458  */
 459 VLC_EXPORT( void, __osd_MenuHide, ( vlc_object_t * ) );
 460
 461 /**
 462  * Activate the action of this OSD menu item.
 463  *
 464  * The rc interface command "menu select" triggers the sending of an
 465  * hotkey action to the hotkey interface. The hotkey that belongs to
 466  * the current highlighted OSD menu item will be used.
 467  */
 468 VLC_EXPORT( void, __osd_MenuActivate,   ( vlc_object_t * ) );
 469
 470 #define osd_MenuShow(object) __osd_MenuShow( VLC_OBJECT(object) )
 471 #define osd_MenuHide(object) __osd_MenuHide( VLC_OBJECT(object) )
 472 #define osd_MenuActivate(object)   __osd_MenuActivate( VLC_OBJECT(object) )
 473
 474 /**
 475  * Next OSD menu item
 476  *
 477  * Select the next OSD menu item to be highlighted.
 478  * Note: The actual position on screen of the menu item is determined by
 479  * the OSD menu configuration file.
 480  */
 481 VLC_EXPORT( void, __osd_MenuNext, ( vlc_object_t * ) );
 482
 483 /**
 484  * Previous OSD menu item
 485  *
 486  * Select the previous OSD menu item to be highlighted.
 487  * Note: The actual position on screen of the menu item is determined by
 488  * the OSD menu configuration file.
 489  */
 490 VLC_EXPORT( void, __osd_MenuPrev, ( vlc_object_t * ) );
 491
 492 /**
 493  * OSD menu item above
 494  *
 495  * Select the OSD menu item above the current item to be highlighted.
 496  * Note: The actual position on screen of the menu item is determined by
 497  * the OSD menu configuration file.
 498  */
 499 VLC_EXPORT( void, __osd_MenuUp,   ( vlc_object_t * ) );
 500
 501 /**
 502  * OSD menu item below
 503  *
 504  * Select the next OSD menu item below the current item to be highlighted.
 505  * Note: The actual position on screen of the menu item is determined by
 506  * the OSD menu configuration file.
 507  */
 508 VLC_EXPORT( void, __osd_MenuDown, ( vlc_object_t * ) );
 509
 510 #define osd_MenuNext(object) __osd_MenuNext( VLC_OBJECT(object) )
 511 #define osd_MenuPrev(object) __osd_MenuPrev( VLC_OBJECT(object) )
 512 #define osd_MenuUp(object)   __osd_MenuUp( VLC_OBJECT(object) )
 513 #define osd_MenuDown(object) __osd_MenuDown( VLC_OBJECT(object) )
 514
 515 /**
 516  * Display the audio volume bitmap.
 517  *
 518  * Display the correct audio volume bitmap that corresponds to the
 519  * current Audio Volume setting.
 520  */
 521 VLC_EXPORT( void, __osd_Volume, ( vlc_object_t * ) );
 522
 523 #define osd_Volume(object)     __osd_Volume( VLC_OBJECT(object) )
 524
 525 /**
 526  * Retrieve a non modifyable pointer to the OSD Menu state
 527  *
 528  */
 529 static inline const osd_menu_state_t *osd_GetMenuState( osd_menu_t *p_osd )
 530 {
 531     return( p_osd->p_state );
 532 }
 533
 534 /**
 535  * Get the last key press received by the OSD Menu
 536  *
 537  * Returns 0 when no key has been pressed or the value of the key pressed.
 538  */
 539 static inline bool osd_GetKeyPressed( osd_menu_t *p_osd )
 540 {
 541     return( p_osd->p_state->b_update );
 542 }
 543
 544 /**
 545  * Set the key pressed to a value.
 546  *
 547  * Assign a new key value to the last key pressed on the OSD Menu.
 548  */
 549 static inline void osd_SetKeyPressed( vlc_object_t *p_this, int i_value )
 550 {
 551     vlc_value_t val;
 552
 553     val.i_int = i_value;
 554     var_Set( p_this, "key-pressed", val );
 555 }
 556
 557 /**
 558  * Update the OSD Menu visibility flag.
 559  *
 560  * true means OSD Menu should be shown. false means OSD Menu
 561  * should not be shown.
 562  */
 563 static inline void osd_SetMenuVisible( osd_menu_t *p_osd, bool b_value )
 564 {
 565     vlc_value_t val;
 566
 567     val.b_bool = p_osd->p_state->b_menu_visible = b_value;
 568     var_Set( p_osd, "osd-menu-visible", val );
 569 }
 570
 571 /**
 572  * Update the OSD Menu update flag
 573  *
 574  * If the OSD Menu should be updated then set the update flag to
 575  * true, else to false.
 576  */
 577 static inline void osd_SetMenuUpdate( osd_menu_t *p_osd, bool b_value )
 578 {
 579     vlc_value_t val;
 580
 581     val.b_bool = p_osd->p_state->b_update = b_value;
 582     var_Set( p_osd, "osd-menu-update", val );
 583 }
 584
 585 /**
 586  * Textual feedback
 587  *
 588  * Functions that provide the textual feedback on the OSD. They are shown
 589  * on hotkey commands. The feedback is also part of the osd_button_t
 590  * object. The types are declared in the include file include/vlc_osd.h
 591  * @see vlc_osd.h
 592  */
 593 VLC_EXPORT( int, osd_ShowTextRelative, ( spu_t *, int, const char *, text_style_t *, int, int, int, mtime_t ) );
 594 VLC_EXPORT( int, osd_ShowTextAbsolute, ( spu_t *, int, const char *, text_style_t *, int, int, int, mtime_t, mtime_t ) );
 595 VLC_EXPORT( void, osd_Message, ( spu_t *, int, char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
 596
 597 /**
 598  * Default feedback images
 599  *
 600  * Functions that provide the default OSD feedback images on hotkey
 601  * commands. These feedback images are also part of the osd_button_t
 602  * object. The types are declared in the include file include/vlc_osd.h
 603  * @see vlc_osd.h
 604  */
 605 VLC_EXPORT( int, osd_Slider, ( vlc_object_t *, spu_t *, int, int, int, int, int, int, short ) );
 606 VLC_EXPORT( int, osd_Icon, ( vlc_object_t *, spu_t *, int, int, int, int, int, short ) );
 607
 608 /** @} */
 609
 610 /**********************************************************************
 611  * Vout text and widget overlays
 612  **********************************************************************/
 613
 614 /**
 615  * Show text on the video for some time
 616  * \param p_vout pointer to the vout the text is to be showed on
 617  * \param i_channel Subpicture channel
 618  * \param psz_string The text to be shown
 619  * \param p_style Pointer to a struct with text style info
 620  * \param i_flags flags for alignment and such
 621  * \param i_hmargin horizontal margin in pixels
 622  * \param i_vmargin vertical margin in pixels
 623  * \param i_duration Amount of time the text is to be shown.
 624  */
 625 VLC_EXPORT( int, vout_ShowTextRelative, ( vout_thread_t *, int, char *, text_style_t *, int, int, int, mtime_t ) );
 626
 627 /**
 628  * Show text on the video from a given start date to a given end date
 629  * \param p_vout pointer to the vout the text is to be showed on
 630  * \param i_channel Subpicture channel
 631  * \param psz_string The text to be shown
 632  * \param p_style Pointer to a struct with text style info
 633  * \param i_flags flags for alignment and such
 634  * \param i_hmargin horizontal margin in pixels
 635  * \param i_vmargin vertical margin in pixels
 636  * \param i_start the time when this string is to appear on the video
 637  * \param i_stop the time when this string should stop to be displayed
 638  *               if this is 0 the string will be shown untill the next string
 639  *               is about to be shown
 640  */
 641 VLC_EXPORT( int, vout_ShowTextAbsolute, ( vout_thread_t *, int, const char *, text_style_t *, int, int, int, mtime_t, mtime_t ) );
 642
 643 /**
 644  * Write an informative message at the default location,
 645  * for the default duration and only if the OSD option is enabled.
 646  * \param p_caller The object that called the function.
 647  * \param i_channel Subpicture channel
 648  * \param psz_format printf style formatting
 649  **/
 650 VLC_EXPORT( void,  __vout_OSDMessage, ( vlc_object_t *, int, const char *, ... ) LIBVLC_FORMAT( 3, 4 ) );
 651
 652 /**
 653  * Same as __vlc_OSDMessage() but with automatic casting
 654  */
 655 #define vout_OSDMessage( obj, chan, ...) \
 656       __vout_OSDMessage( VLC_OBJECT(obj), chan, __VA_ARGS__ )
 657
 658 /**
 659  * Display a slider on the video output.
 660  * \param p_this    The object that called the function.
 661  * \param i_channel Subpicture channel
 662  * \param i_postion Current position in the slider
 663  * \param i_type    Types are: OSD_HOR_SLIDER and OSD_VERT_SLIDER.
 664  * @see vlc_osd.h
 665  */
 666 VLC_EXPORT( void, vout_OSDSlider, ( vlc_object_t *, int, int , short ) );
 667
 668 /**
 669  * Display an Icon on the video output.
 670  * \param p_this    The object that called the function.
 671  * \param i_channel Subpicture channel
 672  * \param i_type    Types are: OSD_PLAY_ICON, OSD_PAUSE_ICON, OSD_SPEAKER_ICON, OSD_MUTE_ICON
 673  * @see vlc_osd.h
 674  */
 675 VLC_EXPORT( void, vout_OSDIcon, ( vlc_object_t *, int, short ) );
 676
 677 # ifdef __cplusplus
 678 }
 679 # endif
 680
 681 #endif /* _VLC_OSD_H */