OSD Menu

The OSD menu core creates the OSD menu structure in memory. More...

Data Structures

struct  text_style_t
 Text style. More...
struct  osd_state_t
 OSD State object. More...
struct  osd_button_t
 OSD Button object. More...
struct  osd_menu_state_t
 OSD Menu State object. More...
struct  osd_menu_t
 OSD Menu object. More...

Defines

#define OSD_ALIGN_LEFT   0x1
 The OSD Menu configuration file format.
#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
#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
#define OSD_BUTTON_UNSELECT   0
 OSD menu button states.
#define OSD_BUTTON_SELECT   1
#define OSD_BUTTON_PRESSED   2
#define OSD_MENU_STYLE_SIMPLE   0x0
 OSD Menu Style.
#define OSD_MENU_STYLE_CONCAT   0x1
#define osd_MenuCreate(object, file)   __osd_MenuCreate( VLC_OBJECT(object), file )
#define osd_MenuDelete(object, osd)   __osd_MenuDelete( VLC_OBJECT(object), osd )
#define osd_ButtonFind(object, x, y, h, w, sh, sw)   __osd_ButtonFind(object,x,y,h,w,sh,sw)
#define osd_ButtonSelect(object, button)   __osd_ButtonSelect(object,button)
#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) )
#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) )
#define osd_Volume(object)   __osd_Volume( VLC_OBJECT(object) )

Functions

text_style_ttext_style_New (void)
 Create a default text style.
text_style_ttext_style_Copy (text_style_t *, const text_style_t *)
 Copy a text style into another.
text_style_ttext_style_Duplicate (const text_style_t *)
 Duplicate a text style.
void text_style_Delete (text_style_t *)
 Delete a text style created by text_style_New or text_style_Duplicate.
osd_menu_t__osd_MenuCreate (vlc_object_t *, const char *)
 Initialize an osd_menu_t object.
void __osd_MenuDelete (vlc_object_t *, osd_menu_t *)
 Delete the osd_menu_t object.
osd_button_t__osd_ButtonFind (vlc_object_t *p_this, int, int, int, int, int, int)
 Find OSD Menu button at position x,y.
void __osd_ButtonSelect (vlc_object_t *, osd_button_t *)
 Select the button provided as the new active button.
void __osd_MenuShow (vlc_object_t *)
 Show the OSD menu.
void __osd_MenuHide (vlc_object_t *)
 Hide the OSD menu.
void __osd_MenuActivate (vlc_object_t *)
 Activate the action of this OSD menu item.
void __osd_MenuNext (vlc_object_t *)
 Next OSD menu item.
void __osd_MenuPrev (vlc_object_t *)
 Previous OSD menu item.
void __osd_MenuUp (vlc_object_t *)
 OSD menu item above.
void __osd_MenuDown (vlc_object_t *)
 OSD menu item below.
void __osd_Volume (vlc_object_t *)
 Display the audio volume bitmap.
static const osd_menu_state_tosd_GetMenuState (osd_menu_t *p_osd)
 Retrieve a non modifyable pointer to the OSD Menu state.
static bool osd_GetKeyPressed (osd_menu_t *p_osd)
 Get the last key press received by the OSD Menu.
static void osd_SetKeyPressed (vlc_object_t *p_this, int i_value)
 Set the key pressed to a value.
static void osd_SetMenuVisible (osd_menu_t *p_osd, bool b_value)
 Update the OSD Menu visibility flag.
static void osd_SetMenuUpdate (osd_menu_t *p_osd, bool b_value)
 Update the OSD Menu update flag.
int osd_ShowTextRelative (spu_t *, int, const char *, const text_style_t *, int, int, int, mtime_t)
 Textual feedback.
int osd_ShowTextAbsolute (spu_t *, int, const char *, const text_style_t *, int, int, int, mtime_t, mtime_t)
 Show text on the video from a given start date to a given end date.
void osd_Message (spu_t *, int, char *,...)
 Write an informative message at the default location, for the default duration and only if the OSD option is enabled.
int osd_Slider (vlc_object_t *, spu_t *, int, int, int, int, int, int, short)
 Default feedback images.
int osd_Icon (vlc_object_t *, spu_t *, int, int, int, int, int, short)

Detailed Description

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

An example for local usage of the OSD menu is:

vlc dvdsimple:///dev/dvd --extraintf rc --sub-filter osdmenu --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".


Define Documentation

#define OSD_ALIGN_BOTTOM   0x8

#define OSD_ALIGN_LEFT   0x1

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 = [ ' ' | '' ]+ OSDMENU_PATH = PATHNAME DIR = 'dir' WS OSDMENU_PATH '
' STYLE = 'style' [ 'default' | 'concat' ] '
' STATE = [ 'unselect' | 'select' | 'pressed' ] HOTKEY_ACTION = 'key-' [ 'a' .. 'z', 'A' .. 'Z', '-' ]+

ACTION_TYPE = 'type' 'volume' '
' ACTION_BLOCK_START = 'action' WS HOTKEY_ACTION WS '('POS','POS')' '
' ACTION_BLOCK_END = 'end' '
' ACTION_STATE = STATE WS FILENAME '
' ACTION_RANGE_START = 'range' WS HOTKEY_ACTION WS DEFAULT_INDEX '
' ACTION_RANGE_END = 'end' '
' ACTION_RANGE_STATE = FILENAME '
'

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

Referenced by Filter(), mediacontrol_display_text(), and RenderText().

#define OSD_ALIGN_RIGHT   0x2

#define OSD_ALIGN_TOP   0x4

#define OSD_BUTTON_PRESSED   2

Referenced by __osd_MenuActivate(), and osd_StateNew().

#define OSD_BUTTON_SELECT   1

#define OSD_BUTTON_UNSELECT   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

Referenced by __osd_ButtonSelect(), __osd_MenuNext(), __osd_MenuPrev(), __osd_MenuShow(), and osd_StateNew().

#define osd_ButtonFind ( object,
x,
y,
h,
w,
sh,
sw   )     __osd_ButtonFind(object,x,y,h,w,sh,sw)

Referenced by MouseEvent().

#define osd_ButtonSelect ( object,
button   )     __osd_ButtonSelect(object,button)

Referenced by MouseEvent().

#define OSD_HOR_SLIDER   1

#define OSD_MENU_STYLE_CONCAT   0x1

Referenced by Filter(), and osd_parser_simpleOpen().

#define OSD_MENU_STYLE_SIMPLE   0x0

OSD Menu Style.

The images that make up an OSD menu can be created in such away that they contain all buttons in the same picture, with the selected one highlighted or being a concatenation of all the seperate images. The first case is the default.

To change the default style the keyword 'style' should be set to 'concat'.

Referenced by osd_MenuNew(), and osd_parser_simpleOpen().

#define osd_MenuActivate ( object   )     __osd_MenuActivate( VLC_OBJECT(object) )

Referenced by Filter(), Menu(), Process(), and PutAction().

#define osd_MenuCreate ( object,
file   )     __osd_MenuCreate( VLC_OBJECT(object), file )

Referenced by CreateFilter().

#define osd_MenuDelete ( object,
osd   )     __osd_MenuDelete( VLC_OBJECT(object), osd )

Referenced by DestroyFilter().

#define osd_MenuDown ( object   )     __osd_MenuDown( VLC_OBJECT(object) )

Referenced by Menu(), Process(), and PutAction().

#define osd_MenuHide ( object   )     __osd_MenuHide( VLC_OBJECT(object) )

Referenced by Menu(), Process(), and PutAction().

#define osd_MenuNext ( object   )     __osd_MenuNext( VLC_OBJECT(object) )

Referenced by Menu(), Process(), and PutAction().

#define osd_MenuPrev ( object   )     __osd_MenuPrev( VLC_OBJECT(object) )

Referenced by Menu(), Process(), and PutAction().

#define osd_MenuShow ( object   )     __osd_MenuShow( VLC_OBJECT(object) )

Referenced by Menu(), Process(), and PutAction().

#define osd_MenuUp ( object   )     __osd_MenuUp( VLC_OBJECT(object) )

Referenced by Menu(), Process(), and PutAction().

#define OSD_MUTE_ICON   4

#define OSD_PAUSE_ICON   2

#define OSD_PLAY_ICON   1

#define OSD_SPEAKER_ICON   3

#define OSD_VERT_SLIDER   2

#define osd_Volume ( object   )     __osd_Volume( VLC_OBJECT(object) )

Referenced by Volume(), and VolumeMove().

#define STYLE_BACKGROUND   16

Referenced by ParseSSAHeader().

#define STYLE_BOLD   1

#define STYLE_ITALIC   2

#define STYLE_OUTLINE   4

Referenced by ParseSSAHeader(), and text_style_New().

#define STYLE_SHADOW   8

#define STYLE_STRIKEOUT   64

Referenced by ParseSSAHeader().

#define STYLE_UNDERLINE   32


Function Documentation

osd_button_t* __osd_ButtonFind ( vlc_object_t p_this,
int  ,
int  ,
int  ,
int  ,
int  ,
int   
)

void __osd_ButtonSelect ( vlc_object_t ,
osd_button_t  
)

void __osd_MenuActivate ( vlc_object_t  ) 

osd_menu_t* __osd_MenuCreate ( vlc_object_t ,
const char *   
)

void __osd_MenuDelete ( vlc_object_t ,
osd_menu_t  
)

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.

References i_refcount, osd_GetMutex(), osd_ParserUnload(), vlc_value_t::p_address, vlc_object_t::p_libvlc, var_Destroy, var_Set, vlc_internals, vlc_mutex_lock(), vlc_mutex_unlock(), VLC_OBJECT, and vlc_object_release.

Referenced by __osd_MenuCreate().

void __osd_MenuDown ( vlc_object_t  ) 

void __osd_MenuHide ( vlc_object_t  ) 

Hide the OSD menu.

Stop showing the OSD menu on the video output or mux it into the stream.

References osd_menu_state_t::i_x, osd_menu_state_t::i_y, msg_Dbg, msg_Err, osd_Find(), osd_GetMutex(), osd_SetMenuUpdate(), osd_UpdateState(), osd_menu_t::p_state, vlc_mutex_lock(), and vlc_mutex_unlock().

void __osd_MenuNext ( vlc_object_t  ) 

void __osd_MenuPrev ( vlc_object_t  ) 

void __osd_MenuShow ( vlc_object_t  ) 

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 also:
Stream output)

References osd_button_t::b_range, osd_state_t::i_height, osd_state_t::i_width, osd_button_t::i_x, osd_button_t::i_y, msg_Dbg, msg_Err, OSD_BUTTON_SELECT, OSD_BUTTON_UNSELECT, osd_Find(), osd_GetMutex(), osd_SetMenuUpdate(), osd_SetMenuVisible(), osd_StateChange(), osd_UpdateState(), osd_menu_t::p_button, osd_button_t::p_current_state, osd_state_t::p_pic, osd_menu_t::p_state, osd_menu_state_t::p_visible, vlc_mutex_lock(), and vlc_mutex_unlock().

void __osd_MenuUp ( vlc_object_t  ) 

void __osd_Volume ( vlc_object_t p_this  ) 

Display the audio volume bitmap.

Display the correct audio volume bitmap that corresponds to the current Audio Volume setting.

Display the audio volume bitmap.

The OSD Menu audio volume bar is updated to reflect the new audio volume. Call this function when the audio volume is updated outside the OSD menu command "menu up", "menu down" or "menu select".

References osd_button_t::b_range, config_GetInt, osd_state_t::i_height, osd_button_t::i_ranges, osd_state_t::i_width, osd_button_t::i_x, osd_button_t::i_y, msg_Err, osd_Find(), osd_GetMutex(), osd_SetMenuUpdate(), osd_SetMenuVisible(), osd_UpdateState(), osd_VolumeStateChange(), osd_VolumeStep(), osd_button_t::p_current_state, osd_state_t::p_pic, osd_menu_t::p_state, osd_button_t::p_states, osd_menu_state_t::p_visible, osd_menu_state_t::p_volume, vlc_mutex_lock(), and vlc_mutex_unlock().

static bool osd_GetKeyPressed ( osd_menu_t p_osd  )  [inline, static]

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.

References vlc_value_t::i_int.

static const osd_menu_state_t* osd_GetMenuState ( osd_menu_t p_osd  )  [inline, static]

Retrieve a non modifyable pointer to the OSD Menu state.

References osd_menu_state_t::b_update, and osd_menu_t::p_state.

int osd_Icon ( vlc_object_t ,
spu_t ,
int  ,
int  ,
int  ,
int  ,
int  ,
short   
)

void osd_Message ( spu_t p_spu,
int  i_channel,
char *  psz_format,
  ... 
)

Write an informative message at the default location, for the default duration and only if the OSD option is enabled.

Parameters:
p_caller The object that called the function.
i_channel Subpicture channel
psz_format printf style formatting

References OSD_ALIGN_RIGHT, OSD_ALIGN_TOP, osd_ShowTextRelative(), and vasprintf().

static void osd_SetKeyPressed ( vlc_object_t p_this,
int  i_value 
) [inline, static]

Set the key pressed to a value.

Assign a new key value to the last key pressed on the OSD Menu.

Referenced by __osd_MenuActivate(), __osd_MenuDown(), and __osd_MenuUp().

static void osd_SetMenuUpdate ( osd_menu_t p_osd,
bool  b_value 
) [inline, static]

Update the OSD Menu update flag.

If the OSD Menu should be updated then set the update flag to true, else to false.

Referenced by __osd_ButtonSelect(), __osd_MenuActivate(), __osd_MenuDown(), __osd_MenuHide(), __osd_MenuNext(), __osd_MenuPrev(), __osd_MenuShow(), __osd_MenuUp(), and __osd_Volume().

static void osd_SetMenuVisible ( osd_menu_t p_osd,
bool  b_value 
) [inline, static]

Update the OSD Menu visibility flag.

true means OSD Menu should be shown. false means OSD Menu should not be shown.

Referenced by __osd_MenuActivate(), __osd_MenuShow(), and __osd_Volume().

int osd_ShowTextAbsolute ( spu_t p_spu_channel,
int  i_channel,
const char *  psz_string,
const text_style_t p_style,
int  i_flags,
int  i_hmargin,
int  i_vmargin,
mtime_t  i_start,
mtime_t  i_stop 
)

Show text on the video from a given start date to a given end date.

Parameters:
p_spu pointer to the subpicture queue the text is to be showed on
i_channel Subpicture channel
psz_string The text to be shown
p_style Pointer to a struct with text style info (it is duplicated)
i_flags flags for alignment and such
i_hmargin horizontal margin in pixels
i_vmargin vertical margin in pixels
i_start the time when this string is to appear on the video
i_stop the time when this string should stop to be displayed if this is 0 the string will be shown untill the next string is about to be shown

References subpicture_t::b_absolute, subpicture_t::b_ephemer, subpicture_region_t::i_align, video_format_t::i_aspect, subpicture_t::i_channel, video_format_t::i_chroma, video_format_t::i_height, subpicture_t::i_start, subpicture_t::i_stop, video_format_t::i_width, subpicture_region_t::i_x, video_format_t::i_x_offset, subpicture_region_t::i_y, video_format_t::i_y_offset, msg_Err, subpicture_t::p_region, subpicture_region_t::psz_text, spu_DisplaySubpicture(), strdup(), SUBPICTURE_ALIGN_MASK, subpicture_Delete(), subpicture_New(), subpicture_region_New(), VLC_CODEC_TEXT, VLC_EGENERIC, and VLC_SUCCESS.

Referenced by mediacontrol_showtext(), and osd_ShowTextRelative().

int osd_ShowTextRelative ( spu_t p_spu,
int  i_channel,
const char *  psz_string,
const text_style_t p_style,
int  i_flags,
int  i_hmargin,
int  i_vmargin,
mtime_t  i_duration 
)

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 also:
vlc_osd.h
Textual feedback.

Parameters:
p_spu pointer to the subpicture queue the text is to be showed on
i_channel Subpicture channel
psz_string The text to be shown
p_style Pointer to a struct with text style info (it is duplicated)
i_flags flags for alignment and such
i_hmargin horizontal margin in pixels
i_vmargin vertical margin in pixels
i_duration Amount of time the text is to be shown.

References mdate(), and osd_ShowTextAbsolute().

Referenced by osd_Message().

int osd_Slider ( vlc_object_t ,
spu_t ,
int  ,
int  ,
int  ,
int  ,
int  ,
int  ,
short   
)

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 also:
vlc_osd.h

References CreatePicture(), DrawRect(), i_height, osd_CreateWidget(), OSD_HOR_SLIDER, OSD_VERT_SLIDER, spu_DisplaySubpicture(), STYLE_EMPTY, STYLE_FILLED, VLC_EGENERIC, and VLC_SUCCESS.

Referenced by vout_OSDSlider().

text_style_t* text_style_Copy ( text_style_t ,
const text_style_t  
)

Copy a text style into another.

References text_style_t::psz_fontname, and strdup().

Referenced by ParseUSFHeaderTags(), and text_style_Duplicate().

void text_style_Delete ( text_style_t  ) 

Delete a text style created by text_style_New or text_style_Duplicate.

References text_style_t::psz_fontname.

Referenced by Create(), CreateFilter(), Destroy(), DestroyFilter(), OverlayDestroy(), RenderClear(), and subpicture_region_Delete().

text_style_t* text_style_Duplicate ( const text_style_t  ) 

Duplicate a text style.

References p_dst, and text_style_Copy().

Referenced by CreateTextRegion(), Filter(), ParseSSAString(), RenderText(), and vout_ShowTextAbsolute().

text_style_t* text_style_New ( void   ) 


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