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vlc/include/vlc_osd.h

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/*****************************************************************************
* vlc_osd.h - OSD menu definitions and function prototypes
*****************************************************************************
* Copyright (C) 2004-2005 M2X
* $Id$
*
* Authors: Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
*
* Added code from include/osd.h written by:
* Copyright (C) 2003-2005 the VideoLAN team
* Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/**
* \file
* The OSD menu core creates the OSD menu structure in memory. It parses a
* configuration file that defines all elements that are part of the menu. The
* core also handles all actions and menu structure updates on behalf of video
* subpicture filters.
*
* The file modules/video_filters/osdmenu.c implements a subpicture filter that
* specifies the final information on positioning of the current state image.
* A subpicture filter is called each time a video picture has to be rendered, it
* also gives a start and end date to the subpicture. The subpicture can be streamed
* if used inside a transcoding command. For example:
*
* vlc dvdsimple:///dev/dvd --extraintf rc
* --sout='#transcode{osd}:std{access=udp,mux=ts,dst=dest_ipaddr}'
* --osdmenu-file=share/osdmenu/dvd.cfg
*
* Each OSD menu element, called "action", defines a hotkey action. Each action
* can have several states (unselect, select, pressed). Each state has an image
* that represents the state visually. The commands "menu right", "menu left",
* "menu up" and "menu down" are used to navigate through the OSD menu structure.
* The commands "menu on" or "menu show" and "menu off" or "menu hide" respectively
* show and hide the OSD menu subpictures.
*
* There is one special element called "range". A range is an arbritary range
* of state images that can be browsed using "menu up" and "menu down" commands
* on the rc interface.
*
* The OSD menu configuration file uses a very simple syntax and basic parser.
* A configuration file has the ".cfg". An example is "share/osdmenu/dvd256.cfg".
*/
#ifndef _VLC_OSD_H
#define _VLC_OSD_H 1
#include "vlc_video.h"
# ifdef __cplusplus
extern "C" {
# endif
/**
* \brief The OSD Menu configuration file format.
*
* The configuration file syntax is very basic and so is its parser. See the
* BNF formal representation below:
*
* The keywords FILENAME and PATHNAME represent the filename and pathname
* specification that is valid for the Operating System VLC is compiled for.
*
* The hotkey actions that are supported by VLC are documented in the file
* src/libvlc. The file include/vlc_keys.h defines some hotkey internals.
*
* CONFIG_FILE = FILENAME '.cfg'
* WS = [ ' ' | '\t' ]+
* OSDMEN_PATH = PATHNAME
* DIR = 'dir' WS OSDMENU_PATH '\n'
* STATE = [ 'unselect' | 'select' | 'pressed' ]
* HOTKEY_ACTION = 'key-' [ 'a' .. 'z', 'A' .. 'Z', '-' ]+
*
* ACTION_TYPE = 'type' 'volume' '\n'
* ACTION_BLOCK_START = 'action' WS HOTKEY_ACTION WS '('POS','POS')' '\n'
* ACTION_BLOCK_END = 'end' '\n'
* ACTION_STATE = STATE WS FILENAME '\n'
* ACTION_RANGE_START = 'range' WS HOTKEY_ACTION WS DEFAULT_INDEX '\n'
* ACTION_RANGE_END = 'end' '\n'
* ACTION_RANGE_STATE = FILENAME '\n'
*
* ACTION_BLOCK_RANGE = ACTION_RANGE_START [WS ACTION_RANGE_STATE]+ WS ACTION_RANGE_END
* ACTION_BLOCK = ACTION_BLOCK_START [WS ACTION_TYPE*] [ [WS ACTION_STATE]+3 | [WS ACTION_BLOCK_RANGE]+1 ] ACTION_BLOCK_END
* CONFIG_FILE_CONTENTS = DIR [ACTION_BLOCK]+
*
*/
/**
* OSD menu position and picture type defines
*/
#define OSD_ALIGN_LEFT 0x1
#define OSD_ALIGN_RIGHT 0x2
#define OSD_ALIGN_TOP 0x4
#define OSD_ALIGN_BOTTOM 0x8
#define OSD_HOR_SLIDER 1
#define OSD_VERT_SLIDER 2
#define OSD_PLAY_ICON 1
#define OSD_PAUSE_ICON 2
#define OSD_SPEAKER_ICON 3
#define OSD_MUTE_ICON 4
/**
* Text style
*
* A text style is used to specify the formatting of text.
* A font renderer can use the supplied information to render the
* text specified.
*/
struct text_style_t
{
char * psz_fontname; /**< The name of the font */
int i_font_size; /**< The font size in pixels */
int i_font_color; /**< The color of the text 0xRRGGBB
(native endianness) */
int i_font_alpha; /**< The transparency of the text.
0x00 is fully opaque,
0xFF fully transparent */
int i_style_flags; /**< Formatting style flags */
int i_outline_color; /**< The color of the outline 0xRRGGBB */
int i_outline_alpha; /**< The transparency of the outline.
0x00 is fully opaque,
0xFF fully transparent */
int i_shadow_color; /**< The color of the shadow 0xRRGGBB */
int i_shadow_alpha; /**< The transparency of the shadow.
0x00 is fully opaque,
0xFF fully transparent */
int i_background_color;/**< The color of the background 0xRRGGBB */
int i_background_alpha;/**< The transparency of the background.
0x00 is fully opaque,
0xFF fully transparent */
int i_outline_width; /**< The width of the outline in pixels */
int i_shadow_width; /**< The width of the shadow in pixels */
int i_spacing; /**< The spaceing between glyphs in pixels */
int i_text_align; /**< An alignment hint for the text */
};
/* Style flags for \ref text_style_t */
#define STYLE_BOLD 1
#define STYLE_ITALIC 2
#define STYLE_OUTLINE 4
#define STYLE_SHADOW 8
#define STYLE_BACKGROUND 16
#define STYLE_UNDERLINE 32
#define STYLE_STRIKEOUT 64
static const text_style_t default_text_style = { NULL, 22, 0xffffff, 0xff, STYLE_OUTLINE,
0x000000, 0xff, 0x000000, 0xff, 0xffffff, 0x80, 1, 0, -1, 0 };
/**
* OSD menu button states
*
* Every button has three states, either it is unselected, selected or pressed.
* An OSD menu skin can associate images with each state.
*
* OSD_BUTTON_UNSELECT 0
* OSD_BUTTON_SELECT 1
* OSD_BUTTON_PRESSED 2
*/
#define OSD_BUTTON_UNSELECT 0
#define OSD_BUTTON_SELECT 1
#define OSD_BUTTON_PRESSED 2
/**
* OSD State object
*
* The OSD state object holds the state and associated images for a
* particular state on the screen. The picture is displayed when this
* state is the active state.
*/
struct osd_state_t
{
osd_state_t *p_next; /*< pointer to next state */
osd_state_t *p_prev; /*< pointer to previous state */
picture_t *p_pic; /*< picture of state */
char *psz_state; /*< state name */
int i_state; /*< state index */
};
/**
* OSD Button object
*
* An OSD Button has different states. Each state has an image for display.
*/
struct osd_button_t
{
osd_button_t *p_next; /*< pointer to next button */
osd_button_t *p_prev; /*< pointer to previous button */
osd_button_t *p_up; /*< pointer to up button */
osd_button_t *p_down; /*< pointer to down button */
osd_state_t *p_current_state; /*< pointer to current state image */
osd_state_t *p_states; /*< doubly linked list of states */
picture_t *p_feedback; /*< feedback picture */
char *psz_name; /*< name of button */
/* These member should probably be a struct hotkey */
char *psz_action; /*< hotkey action name on button*/
char *psz_action_down; /*< hotkey action name on range buttons
for command "menu down" */
/* end of hotkey specifics */
int i_x; /*< x-position of button visible state image */
int i_y; /*< y-position of button visible state image */
/* range style button */
vlc_bool_t b_range; /*< button should be interpreted as range */
int i_ranges; /*< number of states */
};
/**
* OSD Menu State object
*
* Represents the current state as displayed.
*/
/* Represent the menu state */
struct osd_menu_state_t
{
int i_x; /*< x position of spu region */
int i_y; /*< y position of spu region */
int i_width; /*< width of spu region */
int i_height; /*< height of spu region */
picture_t *p_pic; /*< pointer to picture to display */
osd_button_t *p_visible; /*< shortcut to visible button */
vlc_bool_t b_menu_visible; /*< menu currently visible? */
vlc_bool_t b_update; /*< update OSD Menu when VLC_TRUE */
/* quick hack to volume state. */
osd_button_t *p_volume; /*< pointer to volume range object. */
};
/**
* OSD Menu object
*
* The main OSD Menu object, which holds a linked list to all buttons
* and images that defines the menu. The p_state variable represents the
* current state of the OSD Menu.
*/
struct osd_menu_t
{
VLC_COMMON_MEMBERS
int i_x; /*< x-position of OSD Menu on the video screen */
int i_y; /*< y-position of OSD Menu on the video screen */
int i_width; /*< width of OSD Menu on the video screen */
int i_height; /*< height of OSD Menu on the video screen */
char *psz_path; /*< directory where OSD menu images are stored */
osd_button_t *p_button; /*< doubly linked list of buttons */
osd_menu_state_t *p_state; /*< current state of OSD menu */
/* quick link in the linked list. */
osd_button_t *p_last_button; /*< pointer to last button in the list */
};
/**
* Initialize an osd_menu_t object
*
* This functions has to be called before any call to other osd_menu_t*
* functions. It creates the osd_menu object and holds a pointer to it
* during its lifetime.
*/
VLC_EXPORT( osd_menu_t *, __osd_MenuCreate, ( vlc_object_t *, const char * ) );
/**
* Delete the osd_menu_t object
*
* This functions has to be called to release the associated module and
* memory for the osdmenu. After return of this function the pointer to
* osd_menu_t* is invalid.
*/
VLC_EXPORT( void, __osd_MenuDelete, ( vlc_object_t *, osd_menu_t * ) );
/**
* Change state on an osd_button_t.
*
* This function selects the specified state and returns a pointer to it. The
* following states are currently supported:
* \see OSD_BUTTON_UNSELECT
* \see OSD_BUTTON_SELECT
* \see OSD_BUTTON_PRESSED
*/
VLC_EXPORT( osd_state_t *, __osd_StateChange, ( osd_state_t *, const int ) );
#define osd_MenuCreate(object,file) __osd_MenuCreate( VLC_OBJECT(object), file )
#define osd_MenuDelete(object,osd) __osd_MenuDelete( VLC_OBJECT(object), osd )
#define osd_StateChange(object,value) __osd_StateChange( object, value )
/**
* Show the OSD menu.
*
* Show the OSD menu on the video output or mux it into the stream.
* Every change to the OSD menu will now be visible in the output. An output
* can be a video output window or a stream (\see stream output)
*/
VLC_EXPORT( void, __osd_MenuShow, ( vlc_object_t * ) );
/**
* Hide the OSD menu.
*
* Stop showing the OSD menu on the video output or mux it into the stream.
*/
VLC_EXPORT( void, __osd_MenuHide, ( vlc_object_t * ) );
/**
* Activate the action of this OSD menu item.
*
* The rc interface command "menu select" triggers the sending of an
* hotkey action to the hotkey interface. The hotkey that belongs to
* the current highlighted OSD menu item will be used.
*/
VLC_EXPORT( void, __osd_MenuActivate, ( vlc_object_t * ) );
#define osd_MenuShow(object) __osd_MenuShow( VLC_OBJECT(object) )
#define osd_MenuHide(object) __osd_MenuHide( VLC_OBJECT(object) )
#define osd_MenuActivate(object) __osd_MenuActivate( VLC_OBJECT(object) )
/**
* Next OSD menu item
*
* Select the next OSD menu item to be highlighted.
* Note: The actual position on screen of the menu item is determined by
* the OSD menu configuration file.
*/
VLC_EXPORT( void, __osd_MenuNext, ( vlc_object_t * ) );
/**
* Previous OSD menu item
*
* Select the previous OSD menu item to be highlighted.
* Note: The actual position on screen of the menu item is determined by
* the OSD menu configuration file.
*/
VLC_EXPORT( void, __osd_MenuPrev, ( vlc_object_t * ) );
/**
* OSD menu item above
*
* Select the OSD menu item above the current item to be highlighted.
* Note: The actual position on screen of the menu item is determined by
* the OSD menu configuration file.
*/
VLC_EXPORT( void, __osd_MenuUp, ( vlc_object_t * ) );
/**
* OSD menu item below
*
* Select the next OSD menu item below the current item to be highlighted.
* Note: The actual position on screen of the menu item is determined by
* the OSD menu configuration file.
*/
VLC_EXPORT( void, __osd_MenuDown, ( vlc_object_t * ) );
#define osd_MenuNext(object) __osd_MenuNext( VLC_OBJECT(object) )
#define osd_MenuPrev(object) __osd_MenuPrev( VLC_OBJECT(object) )
#define osd_MenuUp(object) __osd_MenuUp( VLC_OBJECT(object) )
#define osd_MenuDown(object) __osd_MenuDown( VLC_OBJECT(object) )
/**
* Display the audio volume bitmap.
*
* Display the correct audio volume bitmap that corresponds to the
* current Audio Volume setting.
*/
VLC_EXPORT( void, __osd_Volume, ( vlc_object_t * ) );
#define osd_Volume(object) __osd_Volume( VLC_OBJECT(object) )
/**
* Retrieve a non modifyable pointer to the OSD Menu state
*
*/
static inline const osd_menu_state_t *osd_GetMenuState( osd_menu_t *p_osd )
{
return( p_osd->p_state );
}
/**
* Get the last key press received by the OSD Menu
*
* Returns 0 when no key has been pressed or the value of the key pressed.
*/
static inline vlc_bool_t osd_GetKeyPressed( osd_menu_t *p_osd )
{
return( p_osd->p_state->b_update );
}
/**
* Set the key pressed to a value.
*
* Assign a new key value to the last key pressed on the OSD Menu.
*/
static inline void osd_SetKeyPressed( vlc_object_t *p_this, int i_value )
{
vlc_value_t val;
val.i_int = i_value;
var_Set( p_this, "key-pressed", val );
}
/**
* Update the OSD Menu visibility flag.
*
* VLC_TRUE means OSD Menu should be shown. VLC_FALSE means OSD Menu
* should not be shown.
*/
static inline void osd_SetMenuVisible( osd_menu_t *p_osd, vlc_bool_t b_value )
{
vlc_value_t val;
val.b_bool = p_osd->p_state->b_menu_visible = b_value;
var_Set( p_osd, "osd-menu-visible", val );
}
/**
* Update the OSD Menu update flag
*
* If the OSD Menu should be updated then set the update flag to
* VLC_TRUE, else to VLC_FALSE.
*/
static inline void osd_SetMenuUpdate( osd_menu_t *p_osd, vlc_bool_t b_value )
{
vlc_value_t val;
val.b_bool = p_osd->p_state->b_update = b_value;
var_Set( p_osd, "osd-menu-update", val );
}
/**
* Textual feedback
*
* Functions that provide the textual feedback on the OSD. They are shown
* on hotkey commands. The feedback is also part of the osd_button_t
* object. The types are declared in the include file include/vlc_osd.h
* @see vlc_osd.h
*/
VLC_EXPORT( int, osd_ShowTextRelative, ( spu_t *, int, char *, text_style_t *, int, int, int, mtime_t ) );
VLC_EXPORT( int, osd_ShowTextAbsolute, ( spu_t *, int, char *, text_style_t *, int, int, int, mtime_t, mtime_t ) );
VLC_EXPORT( void,osd_Message, ( spu_t *, int, char *, ... ) );
/**
* Default feedback images
*
* Functions that provide the default OSD feedback images on hotkey
* commands. These feedback images are also part of the osd_button_t
* object. The types are declared in the include file include/vlc_osd.h
* @see vlc_osd.h
*/
VLC_EXPORT( int, osd_Slider, ( vlc_object_t *, spu_t *, int, int, int, int, int, int, short ) );
VLC_EXPORT( int, osd_Icon, ( vlc_object_t *, spu_t *, int, int, int, int, int, short ) );
/**
* Loading and parse the OSD Configuration file
*
* These functions load/unload the OSD menu configuration file and
* create/destroy the themable OSD menu structure on the OSD object.
*/
VLC_EXPORT( int, osd_ConfigLoader, ( vlc_object_t *, const char *, osd_menu_t ** ) );
VLC_EXPORT( void, osd_ConfigUnload, ( vlc_object_t *, osd_menu_t ** ) );
# ifdef __cplusplus
}
# endif
#endif /* _VLC_OSD_H */
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