1 Instructions to code your own VLC Lua scripts.
7 Lua documenation is available on http://www.lua.org . The reference manual
8 is very usefull: http://www.lua.org/manual/5.1/ .
10 All the Lua standard libraries are available.
15 3 types of VLC Lua scripts can currently be coded:
16 * Playlist (see playlist/README.txt)
17 * Art fetcher (see meta/README.txt)
18 * Interface (see intf/README.txt)
19 * Extensions (see extensions/README.txt)
21 Lua scripts are tried in alphabetical order in the user's VLC config
22 directory lua/{playlist,meta,intf}/ subdirectory on Windows and Mac OS X or
23 in the user's local share directory (~/.local/share/vlc/lua/... on linux),
24 then in the global VLC lua/{playlist,meta,intf}/ directory.
26 3 - VLC specific Lua modules
27 ============================
29 All VLC specifc modules are in the "vlc" object. For example, if you want
30 to use the "info" function of the "msg" VLC specific Lua module:
31 vlc.msg.info( "This is an info message and will be displayed in the console" )
33 Note: availability of the different VLC specific Lua modules depends on
34 the type of VLC Lua script your are in.
38 local a = vlc.acl(true) -> new ACL with default set to allow
39 a:check("10.0.0.1") -> 0 == allow, 1 == deny, -1 == error
40 a("10.0.0.1") -> same as a:check("10.0.0.1")
41 a:duplicate() -> duplicate ACL object
42 a:add_host("10.0.0.1",true) -> allow 10.0.0.1
43 a:add_net("10.0.0.0",24,true) -> allow 10.0.0.0/24 (not sure)
44 a:load_file("/path/to/acl") -> load ACL from file
48 config.get( name ): Get the VLC configuration option "name"'s value.
49 config.set( name, value ): Set the VLC configuration option "name"'s value.
53 local d = vlc.dialog( "My VLC Extension" ): Create a new UI dialog, with a human-readble title: "My VLC Extension"
54 d:show(): Show this dialog.
55 d:hide(): Hide (but not close) this dialog.
56 d:close(): Close and delete this dialog.
57 d:del_widget( widget ): Delete 'widget'. It disappears from the dialog and repositionning may occur.
59 In the following functions, you can always add some optional parameters: col, row, col_span, row_span.
60 They define the position of a widget in the dialog:
61 - row, col are the absolute positions on a grid of widgets. First row, col are 1.
62 - row_span, col_span represent the relative size of a widget on the grid. A widget with col_span = 4 will be displayed as wide as 4 widgets of col_span = 1.
63 Example: w = d:add_label( "My Label", 2, 3, 4, 5 ) will create a label at row 3, col 2, with a relative width of 4, height of 5.
65 d:add_button( text, func, ... ): Create a button with caption "text" (string). When clicked, call function "func". func is a string.
66 d:add_label( text, ... ): Create a text label with caption "text" (string).
67 d:add_html( text, ... ): Create a rich text label with caption "text" (string), that supports basic HTML formatting (such as <i> or <h1> for instance).
68 d:add_text_input( text, ... ): Create an editable text field, in order to read user input.
69 d:add_password( text, ... ): Create an editable text field, in order to read user input. Text entered in this box will not be readable (replaced by asterisks).
70 d:add_check_box( text, ... ): Create a check box with a text. They have a boolean state (true/false).
71 d:add_dropdown( ... ): Create a drop-down widget. Only 1 element can be selected the same time.
72 d:add_list( ... ): Create a list widget. Allows multiple or empty selections.
73 d:add_image( path, ... ): Create an image label. path is a relative or absolute path to the image on the local computer.
75 Some functions can also be applied on widgets:
76 w:set_text( text ): Change text displayed by the widget. Applies to: button, label, html, text_input, password, check_box.
77 w:get_text(): Read text displayed by the widget. Returns a string. Applies to: button, label, html, text_input, password, check_box.
78 w:set_checked( bool ): Set check state of a check box. Applies to: check_box.
79 w:get_checked(): Read check state of a check box. Returns a boolean. Applies to: check_box.
80 w:add_value( text, id ): Add a value with identifier 'id' (integer) and text 'text'. It's always best to have unique identifiers. Applies to: drop_down.
81 w:get_value(): Return identifier of the selected item. Corresponds to the text value chosen by the user. Applies to: drop_down.
82 w:clear(): Clear a list or drop_down widget. After that, all values previously added are lost.
83 w:get_selection(): Retrieve a table representing the current selection. Keys are the ids, values are the texts associated. Applies to: list.
88 deactivate(): Deactivate current extension (after the end of the current function).
92 http( host, port, [cert, key, ca, crl]): create a new HTTP (SSL) daemon.
94 local h = vlc.httpd( "localhost", 8080 )
95 h:handler( url, user, password, acl, callback, data ) -- add a handler for given url. If user and password are non nil, they will be used to authenticate connecting clients. If acl is non nil, it will be used to restrict access. callback will be called to handle connections. The callback function takes 7 arguments: data, url, request, type, in, addr, host. It returns the reply as a string.
96 h:file( url, mime, user, password, acl, callback, data ) -- add a file for given url with given mime type. If user and password are non nil, they will be used to authenticate connecting clients. If acl is non nil, it will be used to restrict access. callback will be called to handle connections. The callback function takes 2 arguments: data and request. It returns the reply as a string.
97 h:redirect( url_dst, url_src ): Redirect all connections from url_src to url_dst.
101 input.info(): Get the current input's info. Return value is a table of tables. Keys of the top level table are info category labels.
102 input.is_playing(): Return true if input exists.
103 input.get_title(): Get the input's name.
104 input.stats(): Get statistics about the input. This is a table with the following fields:
121 msg.dbg( [str1, [str2, [...]]] ): Output debug messages (-vv).
122 msg.warn( [str1, [str2, [...]]] ): Output warning messages (-v).
123 msg.err( [str1, [str2, [...]]] ): Output error messages.
124 msg.info( [str1, [str2, [...]]] ): Output info messages.
128 misc.version(): Get the VLC version string.
129 misc.copyright(): Get the VLC copyright statement.
130 misc.license(): Get the VLC license.
132 misc.datadir(): Get the VLC data directory.
133 misc.userdatadir(): Get the user's VLC data directory.
134 misc.homedir(): Get the user's home directory.
135 misc.configdir(): Get the user's VLC config directory.
136 misc.cachedir(): Get the user's VLC cache directory.
138 misc.datadir_list( name ): FIXME: write description ... or ditch function
139 if it isn't usefull anymore, we have datadir and userdatadir :)
141 misc.mdate(): Get the current date (in milliseconds).
142 misc.mwait(): Wait for the given date (in milliseconds).
144 misc.lock_and_wait(): Lock our object thread and wait for a wake up signal.
146 misc.should_die(): Returns true if the interface should quit.
147 misc.quit(): Quit VLC.
151 net.url_parse( url, [option delimiter] ): Parse URL. Returns a table with
152 fields "protocol", "username", "password", "host", "port", path" and
154 net.listen_tcp( host, port ): Listen to TCP connections. This returns an
155 object with an accept and an fds method. accept is blocking (Poll on the
156 fds with the net.POLLIN flag if you want to be non blockin).
157 The fds method returns a list of fds you can call poll on before using
158 the accept method. For example:
159 local l = vlc.net.listen_tcp( "localhost", 1234 )
161 local fd = l:accept()
163 net.send( fd, "blabla" )
167 net.close( fd ): Close file descriptor.
168 net.send( fd, string, [length] ): Send data on fd.
169 net.recv( fd, [max length] ): Receive data from fd.
170 net.poll( { fd = events }, [timeout in seconds] ): Implement poll function.
171 Retruns the numbers of file descriptors with a non 0 revent. The function
172 modifies the input table to { fd = revents }. See "man poll".
173 net.POLLIN/POLLPRI/POLLOUT/POLLRDHUP/POLLERR/POLLHUP/POLLNVAL: poll event flags
174 net.fd_read( fd, [max length] ): Read data from fd.
175 net.fd_write( fd, string, [length] ): Write data to fd.
176 net.stat( path ): Stat a file. Returns a table with the following fields:
185 net.opendir( path ): List a directory's contents.
189 object.input(): Get the current input object.
190 object.playlist(): Get the playlist object.
191 object.libvlc(): Get the libvlc object.
193 object.find( object, type, mode ): Find an object of given type. mode can
194 be any of "parent", "child" and "anywhere". If set to "parent", it will
195 look in "object"'s parent objects. If set to "child" it will look in
196 "object"'s children. If set to "anywhere", it will look in all the
197 objects. If object is unset, the current module's object will be used.
198 Type can be: "libvlc", "playlist", "input", "decoder",
199 "vout", "aout", "packetizer", "generic".
200 This function is deprecated and slow and should be avoided.
201 object.find_name( object, name, mode ): Same as above except that it matches
202 on the object's name and not type. This function is also slow and should
203 be avoided if possible.
207 osd.icon( type, [id] ): Display an icon on the given OSD channel. Uses the
208 default channel is none is given. Icon types are: "pause", "play",
209 "speaker" and "mute".
210 osd.message( string, [id] ): Display text message on the given OSD channel.
211 osd.slider( position, type, [id] ): Display slider. Position is an integer
212 from 0 to 100. Type can be "horizontal" or "vertical".
213 osd.channel_register(): Register a new OSD channel. Returns the channel id.
214 osd.channel_clear( id ): Clear OSD channel.
215 osd.menu.show(): Show the OSD menu.
216 osd.menu.hide(): Hide the OSD menu.
217 osd.menu.prev(): Select previous/left item.
218 osd.menu.next(): Select next/right item.
219 osd.menu.up(): Move selection up.
220 osd.menu.down(): Move selection down.
221 osd.menu.activate(): Activate/validate current selection.
225 playlist.prev(): Play previous track.
226 playlist.next(): Play next track.
227 playlist.skip( n ): Skip n tracs.
228 playlist.play(): Play.
229 playlist.pause(): Pause.
230 playlist.stop(): Stop.
231 playlist.clear(): Clear the playlist.
232 playlist.repeat_( [status] ): Toggle item repeat or set to specified value.
233 playlist.loop( [status] ): Toggle playlist loop or set to specified value.
234 playlist.random( [status] ): Toggle playlsit random or set to specified value.
235 playlist.goto( id ): Go to specified track.
236 playlist.add( ... ): Add a bunch of items to the playlist.
237 The playlist is a table of playlist objects.
238 A playlist object has the following members:
239 .path: the item's full path / URL
240 .name: the item's name in playlist (OPTIONAL)
241 .title: the item's Title (OPTIONAL, meta data)
242 .artist: the item's Artist (OPTIONAL, meta data)
243 .genre: the item's Genre (OPTIONAL, meta data)
244 .copyright: the item's Copyright (OPTIONAL, meta data)
245 .album: the item's Album (OPTIONAL, meta data)
246 .tracknum: the item's Tracknum (OPTIONAL, meta data)
247 .description: the item's Description (OPTIONAL, meta data)
248 .rating: the item's Rating (OPTIONAL, meta data)
249 .date: the item's Date (OPTIONAL, meta data)
250 .setting: the item's Setting (OPTIONAL, meta data)
251 .url: the item's URL (OPTIONAL, meta data)
252 .language: the item's Language (OPTIONAL, meta data)
253 .nowplaying: the item's NowPlaying (OPTIONAL, meta data)
254 .publisher: the item's Publisher (OPTIONAL, meta data)
255 .encodedby: the item's EncodedBy (OPTIONAL, meta data)
256 .arturl: the item's ArtURL (OPTIONAL, meta data)
257 .trackid: the item's TrackID (OPTIONAL, meta data)
258 .options: a list of VLC options (OPTIONAL)
259 example: .options = { "fullscreen" }
260 .duration: stream duration in seconds (OPTIONAL)
261 .meta: custom meta data (OPTIONAL, meta data)
262 A .meta field is a table of custom meta categories which
263 each have custom meta properties.
264 example: .meta = { ["Google video"] = { ["docid"] = "-5784010886294950089"; ["GVP version"] = "1.1" }; ["misc"] = { "Hello" = "World!" } }
265 Invalid playlist items will be discarded by VLC.
266 playlist.enqueue( ... ): like playlist.add() except that track isn't played.
267 playlist.get( [what, [tree]] ): Get the playist.
268 If "what" is a number, then this will return the corresponding playlist
269 item's playlist hierarchy. If it is "normal" or "playlist", it will
270 return the normal playlist. If it is "ml" or "media library", it will
271 return the media library. If it is "root" it will return the full playlist.
272 If it is a service discovery module's name, it will return that service
273 discovery's playlist. If it is any other string, it won't return anything.
274 Else it will return the fullplaylist.
275 The second argument, "tree", is optional. If set to true or unset, the
276 playlist will be returned in a tree layout. If set to false, the playlist
277 will be returned using the flat layout.
278 Each playlist item returned will have the following members:
280 .flags: a table with the following members if the corresponing flag is
290 .duration: (-1 if unknown)
292 .children: A table of children playlist items.
294 FIXME: add methods to get an item's meta, options, es ...
298 sd.get_services_names(): Get a table of all available service discovery
299 modules. The module name is used as key, the long name is used as value.
300 sd.add( name ): Add service discovery.
301 sd.remove( name ): Remove service discovery.
302 sd.is_loaded( name ): Check if service discovery is loaded.
306 stream( url ): Instantiate a stream object for specific url.
308 s = vlc.stream( "http://www.videolan.org/" )
309 s:read( 128 ) -- read up to 128 characters. Return 0 if no more data is available (FIXME?).
310 s:readline() -- read a line. Return nil if EOF was reached.
311 s:addfilter() -- add a stream filter. If no argument was specified, try to add all automatic stream filters.
315 strings.decode_uri( [uri1, [uri2, [...]]] ): Decode a list of URIs. This
316 function returns as many variables as it had arguments.
317 strings.encode_uri_component( [uri1, [uri2, [...]]] ): Encode a list of URI
318 components. This function returns as many variables as it had arguments.
319 strings.resolve_xml_special_chars( [str1, [str2, [...]]] ): Resolve XML
320 special characters in a list of strings. This function returns as many
321 variables as it had arguments.
322 strings.convert_xml_special_chars( [str1, [str2, [...]]] ): Do the inverse
327 var.get( object, name ): Get the object's variable "name"'s value.
328 var.set( object, name, value ): Set the object's variable "name" to "value".
329 var.get_list( object, name ): Get the object's variable "name"'s value list.
330 1st return value is the value list, 2nd return value is the text list.
331 var.create( object, name, value ): Create and set the object's variable "name"
332 to "value". Created vars can be of type float, string or bool.
334 var.add_callback( object, name, function, data ): Add a callback to the
335 object's "name" variable. Callback functions take 4 arguments: the
336 variable name, the old value, the new value and data.
337 var.del_callback( object, name, function, data ): Delete a callback to
338 the object's "name" variable. "function" and "data" must be the same as
339 when add_callback() was called.
340 var.trigger_callback( object, name ): Trigger the callbacks associated with the
341 object's "name" variable.
343 var.command( object name, name, argument ): Issue "object name"'s "name"
344 command with argument "argument".
345 var.libvlc_command( name, arguement ): Issue libvlc's "name" command with
350 video.fullscreen( [status] ):
351 * toggle fullscreen if no arguments are given
352 * switch to fullscreen 1st argument is true
353 * disable fullscreen if 1st argument is false
357 vlm(): Instanciate a VLM object.
360 v:execute_command( "new test broadcast" ) -- execute given VLM command
362 Note: if the VLM object is deleted and you were the last person to hold
363 a reference to it, all VLM items will be deleted.
367 volume.set( level ): Set volume to an absolute level between 0 and 1024.
369 volume.get(): Get volume.
370 volume.up( [n] ): Increment volume by n steps of 32. n defaults to 1.
371 volume.down( [n] ): Decrement volume by n steps of 32. n defaults to 1.