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)
20 Lua scripts are tried in alphabetical order in the user's VLC config
21 directory lua/{playlist,meta,intf}/ subdirectory on Windows and Mac OS X or
22 in the user's local share directory (~/.local/share/vlc/lua/... on linux),
23 then in the global VLC lua/{playlist,meta,intf}/ directory.
25 3 - VLC specific Lua modules
26 ============================
28 All VLC specifc modules are in the "vlc" object. For example, if you want
29 to use the "info" function of the "msg" VLC specific Lua module:
30 vlc.msg.info( "This is an info message and will be displayed in the console" )
32 Note: availability of the different VLC specific Lua modules depends on
33 the type of VLC Lua script your are in.
37 local a = vlc.acl(true) -> new ACL with default set to allow
38 a:check("10.0.0.1") -> 0 == allow, 1 == deny, -1 == error
39 a("10.0.0.1") -> same as a:check("10.0.0.1")
40 a:duplicate() -> duplicate ACL object
41 a:add_host("10.0.0.1",true) -> allow 10.0.0.1
42 a:add_net("10.0.0.0",24,true) -> allow 10.0.0.0/24 (not sure)
43 a:load_file("/path/to/acl") -> load ACL from file
47 config.get( name ): Get the VLC configuration option "name"'s value.
48 config.set( name, value ): Set the VLC configuration option "name"'s value.
52 http( host, port, [cert, key, ca, crl]): create a new HTTP (SSL) daemon.
54 local h = vlc.httpd( "localhost", 8080 )
55 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.
56 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.
57 h:redirect( url_dst, url_src ): Redirect all connections from url_src to url_dst.
61 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.
62 input.is_playing(): Return true if input exists.
63 input.get_title(): Get the input's name.
64 input.stats(): Get statistics about the input. This is a table with the following fields:
81 msg.dbg( [str1, [str2, [...]]] ): Output debug messages (-vv).
82 msg.warn( [str1, [str2, [...]]] ): Output warning messages (-v).
83 msg.err( [str1, [str2, [...]]] ): Output error messages.
84 msg.info( [str1, [str2, [...]]] ): Output info messages.
88 misc.version(): Get the VLC version string.
89 misc.copyright(): Get the VLC copyright statement.
90 misc.license(): Get the VLC license.
92 misc.datadir(): Get the VLC data directory.
93 misc.userdatadir(): Get the user's VLC data directory.
94 misc.homedir(): Get the user's home directory.
95 misc.configdir(): Get the user's VLC config directory.
96 misc.cachedir(): Get the user's VLC cache directory.
98 misc.datadir_list( name ): FIXME: write description ... or ditch function
99 if it isn't usefull anymore, we have datadir and userdatadir :)
101 misc.mdate(): Get the current date (in milliseconds).
102 misc.mwait(): Wait for the given date (in milliseconds).
104 misc.lock_and_wait(): Lock our object thread and wait for a wake up signal.
106 misc.should_die(): Returns true if the interface should quit.
107 misc.quit(): Quit VLC.
111 net.url_parse( url, [option delimiter] ): Parse URL. Returns a table with
112 fields "protocol", "username", "password", "host", "port", path" and
114 net.listen_tcp( host, port ): Listen to TCP connections. This returns an
115 object with an accept method. This method takes an optional timeout
116 argument (in milliseconds). For example:
117 local l = vlc.net.listen_tcp( "localhost", 1234 )
119 local fd = l:accept( 500 )
121 net.send( fd, "blabla" )
125 net.close( fd ): Close file descriptor.
126 net.send( fd, string, [length] ): Send data on fd.
127 net.recv( fd, [max length] ): Receive data from fd.
128 net.select( nfds, fds_read, fds_write, timeout ): Monitor a bunch of file
129 descriptors. Returns number of fds to handle and the amount of time not
130 slept. See "man select".
131 net.fd_set_new(): Create a new fd_set.
132 local fds = vlc.net.fd_set_new()
133 fds:clr( fd ) -- remove fd from set
134 fds:isset( fd ) -- check if fd is set
135 fds:set( fd ) -- add fd to set
136 fds:zero() -- clear the set
137 net.fd_read( fd, [max length] ): Read data from fd.
138 net.fd_write( fd, string, [length] ): Write data to fd.
139 net.stat( path ): Stat a file. Returns a table with the following fields:
148 net.opendir( path ): List a directory's contents.
152 object.input(): Get the current input object.
153 object.playlist(): Get the playlist object.
154 object.libvlc(): Get the libvlc object.
156 object.find( object, type, mode ): Find an object of given type. mode can
157 be any of "parent", "child" and "anywhere". If set to "parent", it will
158 look in "object"'s parent objects. If set to "child" it will look in
159 "object"'s children. If set to "anywhere", it will look in all the
160 objects. If object is unset, the current module's object will be used.
161 Type can be: "libvlc", "playlist", "input", "decoder",
162 "vout", "aout", "packetizer", "generic".
163 This function is deprecated and slow and should be avoided.
164 object.find_name( object, name, mode ): Same as above except that it matches
165 on the object's name and not type. This function is also slow and should
166 be avoided if possible.
170 osd.icon( type, [id] ): Display an icon on the given OSD channel. Uses the
171 default channel is none is given. Icon types are: "pause", "play",
172 "speaker" and "mute".
173 osd.message( string, [id] ): Display text message on the given OSD channel.
174 osd.slider( position, type, [id] ): Display slider. Position is an integer
175 from 0 to 100. Type can be "horizontal" or "vertical".
176 osd.channel_register(): Register a new OSD channel. Returns the channel id.
177 osd.channel_clear( id ): Clear OSD channel.
178 osd.menu.show(): Show the OSD menu.
179 osd.menu.hide(): Hide the OSD menu.
180 osd.menu.prev(): Select previous/left item.
181 osd.menu.next(): Select next/right item.
182 osd.menu.up(): Move selection up.
183 osd.menu.down(): Move selection down.
184 osd.menu.activate(): Activate/validate current selection.
188 playlist.prev(): Play previous track.
189 playlist.next(): Play next track.
190 playlist.skip( n ): Skip n tracs.
191 playlist.play(): Play.
192 playlist.pause(): Pause.
193 playlist.stop(): Stop.
194 playlist.clear(): Clear the playlist.
195 playlist.repeat_( [status] ): Toggle item repeat or set to specified value.
196 playlist.loop( [status] ): Toggle playlist loop or set to specified value.
197 playlist.random( [status] ): Toggle playlsit random or set to specified value.
198 playlist.goto( id ): Go to specified track.
199 playlist.add( ... ): Add a bunch of items to the playlist.
200 The playlist is a table of playlist objects.
201 A playlist object has the following members:
202 .path: the item's full path / URL
203 .name: the item's name in playlist (OPTIONAL)
204 .title: the item's Title (OPTIONAL, meta data)
205 .artist: the item's Artist (OPTIONAL, meta data)
206 .genre: the item's Genre (OPTIONAL, meta data)
207 .copyright: the item's Copyright (OPTIONAL, meta data)
208 .album: the item's Album (OPTIONAL, meta data)
209 .tracknum: the item's Tracknum (OPTIONAL, meta data)
210 .description: the item's Description (OPTIONAL, meta data)
211 .rating: the item's Rating (OPTIONAL, meta data)
212 .date: the item's Date (OPTIONAL, meta data)
213 .setting: the item's Setting (OPTIONAL, meta data)
214 .url: the item's URL (OPTIONAL, meta data)
215 .language: the item's Language (OPTIONAL, meta data)
216 .nowplaying: the item's NowPlaying (OPTIONAL, meta data)
217 .publisher: the item's Publisher (OPTIONAL, meta data)
218 .encodedby: the item's EncodedBy (OPTIONAL, meta data)
219 .arturl: the item's ArtURL (OPTIONAL, meta data)
220 .trackid: the item's TrackID (OPTIONAL, meta data)
221 .options: a list of VLC options (OPTIONAL)
222 example: .options = { "fullscreen" }
223 .duration: stream duration in seconds (OPTIONAL)
224 .meta: custom meta data (OPTIONAL, meta data)
225 A .meta field is a table of custom meta categories which
226 each have custom meta properties.
227 example: .meta = { ["Google video"] = { ["docid"] = "-5784010886294950089"; ["GVP version"] = "1.1" }; ["misc"] = { "Hello" = "World!" } }
228 Invalid playlist items will be discarded by VLC.
229 playlist.enqueue( ... ): like playlist.add() except that track isn't played.
230 playlist.get( [what, [tree]] ): Get the playist.
231 If "what" is a number, then this will return the corresponding playlist
232 item's playlist hierarchy. If it is "normal" or "playlist", it will
233 return the normal playlist. If it is "ml" or "media library", it will
234 return the media library. If it is "root" it will return the full playlist.
235 If it is a service discovery module's name, it will return that service
236 discovery's playlist. If it is any other string, it won't return anything.
237 Else it will return the fullplaylist.
238 The second argument, "tree", is optional. If set to true or unset, the
239 playlist will be returned in a tree layout. If set to false, the playlist
240 will be returned using the flat layout.
241 Each playlist item returned will have the following members:
243 .flags: a table with the following members if the corresponing flag is
253 .duration: (-1 if unknown)
255 .children: A table of children playlist items.
257 FIXME: add methods to get an item's meta, options, es ...
261 sd.get_services_names(): Get a table of all available service discovery
262 modules. The module name is used as key, the long name is used as value.
263 sd.add( name ): Add service discovery.
264 sd.remove( name ): Remove service discovery.
265 sd.is_loaded( name ): Check if service discovery is loaded.
269 stream( url ): Instantiate a stream object for specific url.
271 s = vlc.stream( "http://www.videolan.org/" )
272 s:read( 128 ) -- read up to 128 characters. Return 0 if no more data is available (FIXME?).
273 s:readline() -- read a line. Return nil if EOF was reached.
274 s:addfilter() -- add a stream filter. If no argument was specified, try to add all automatic stream filters.
278 strings.decode_uri( [uri1, [uri2, [...]]] ): Decode a list of URIs. This
279 function returns as many variables as it had arguments.
280 strings.encode_uri_component( [uri1, [uri2, [...]]] ): Encode a list of URI
281 components. This function returns as many variables as it had arguments.
282 strings.resolve_xml_special_chars( [str1, [str2, [...]]] ): Resolve XML
283 special characters in a list of strings. This function returns as many
284 variables as it had arguments.
285 strings.convert_xml_special_chars( [str1, [str2, [...]]] ): Do the inverse
290 var.get( object, name ): Get the object's variable "name"'s value.
291 var.set( object, name, value ): Set the object's variable "name" to "value".
292 var.get_list( object, name ): Get the object's variable "name"'s value list.
293 1st return value is the value list, 2nd return value is the text list.
294 var.create( object, name, value ): Create and set the object's variable "name"
295 to "value". Created vars can be of type float, string or bool.
297 var.add_callback( object, name, function, data ): Add a callback to the
298 object's "name" variable. Callback functions take 4 arguments: the
299 variable name, the old value, the new value and data.
300 var.del_callback( object, name, function, data ): Delete a callback to
301 the object's "name" variable. "function" and "data" must be the same as
302 when add_callback() was called.
303 var.trigger_callback( object, name ): Trigger the callbacks associated with the
304 object's "name" variable.
306 var.command( object name, name, argument ): Issue "object name"'s "name"
307 command with argument "argument".
308 var.libvlc_command( name, arguement ): Issue libvlc's "name" command with
313 video.fullscreen( [status] ):
314 * toggle fullscreen if no arguments are given
315 * switch to fullscreen 1st argument is true
316 * disable fullscreen if 1st argument is false
320 vlm(): Instanciate a VLM object.
323 v:execute_command( "new test broadcast" ) -- execute given VLM command
325 Note: if the VLM object is deleted and you were the last person to hold
326 a reference to it, all VLM items will be deleted.
330 volume.set( level ): Set volume to an absolute level between 0 and 1024.
332 volume.get(): Get volume.
333 volume.up( [n] ): Increment volume by n steps of 32. n defaults to 1.
334 volume.down( [n] ): Decrement volume by n steps of 32. n defaults to 1.