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 if it isn't usefull anymore, we have datadir and userdatadir :)
100 misc.mdate(): Get the current date (in milliseconds).
101 misc.mwait(): Wait for the given date (in milliseconds).
103 misc.lock_and_wait(): Lock our object thread and wait for a wake up signal.
105 misc.should_die(): Returns true if the interface should quit.
106 misc.quit(): Quit VLC.
110 net.url_parse( url, [option delimiter] ): Parse URL. Returns a table with
111 fields "protocol", "username", "password", "host", "port", path" and
113 net.listen_tcp( host, port ): Listen to TCP connections. This returns an
114 object with an accept method. This method takes an optional timeout
115 argument (in milliseconds). For example:
116 local l = vlc.net.listen_tcp( "localhost", 1234 )
118 local fd = l:accept( 500 )
120 net.send( fd, "blabla" )
124 net.close( fd ): Close file descriptor.
125 net.send( fd, string, [length] ): Send data on fd.
126 net.recv( fd, [max length] ): Receive data from fd.
127 net.select( nfds, fds_read, fds_write, timeout ): Monitor a bunch of file descriptors. Returns number of fds to handle and the amount of time not slept. See "man select".
128 net.fd_set_new(): Create a new fd_set.
129 local fds = vlc.net.fd_set_new()
130 fds:clr( fd ) -- remove fd from set
131 fds:isset( fd ) -- check if fd is set
132 fds:set( fd ) -- add fd to set
133 fds:zero() -- clear the set
134 net.fd_read( fd, [max length] ): Read data from fd.
135 net.fd_write( fd, string, [length] ): Write data to fd.
136 net.stat( path ): Stat a file. Returns a table with the following fields:
145 net.opendir( path ): List a directory's contents.
149 object.input(): Get the current input object.
150 object.playlist(): Get the playlist object.
151 object.libvlc(): Get the libvlc object.
153 object.find( object, type, mode ): Find an object of given type. mode can
154 be any of "parent", "child" and "anywhere". If set to "parent", it will
155 look in "object"'s parent objects. If set to "child" it will look in
156 "object"'s children. If set to "anywhere", it will look in all the
157 objects. If object is unset, the current module's object will be used.
158 Type can be: "libvlc", "playlist", "input", "decoder",
159 "vout", "aout", "packetizer", "generic".
160 This function is deprecated and slow and should be avoided.
161 object.find_name( object, name, mode ): Same as above except that it matches
162 on the object's name and not type. This function is also slow and should
163 be avoided if possible.
167 osd.icon( type, [id] ): Display an icon on the given OSD channel. Uses the
168 default channel is none is given. Icon types are: "pause", "play",
169 "speaker" and "mute".
170 osd.message( string, [id] ): Display text message on the given OSD channel.
171 osd.slider( position, type, [id] ): Display slider. Position is an integer
172 from 0 to 100. Type can be "horizontal" or "vertical".
173 osd.channel_register(): Register a new OSD channel. Returns the channel id.
174 osd.channel_clear( id ): Clear OSD channel.
178 playlist.prev(): Play previous track.
179 playlist.next(): Play next track.
180 playlist.skip( n ): Skip n tracs.
181 playlist.play(): Play.
182 playlist.pause(): Pause.
183 playlist.stop(): Stop.
184 playlist.clear(): Clear the playlist.
185 playlist.repeat( [status] ): Toggle item repeat or set to specified value.
186 playlist.loop( [status] ): Toggle playlist loop or set to specified value.
187 playlist.random( [status] ): Toggle playlsit random or set to specified value.
188 playlist.goto( id ): Go to specified track.
189 playlist.add( ... ): Add a bunch of items to the playlist.
190 The playlist is a table of playlist objects.
191 A playlist object has the following members:
192 .path: the item's full path / URL
193 .name: the item's name in playlist (OPTIONAL)
194 .title: the item's Title (OPTIONAL, meta data)
195 .artist: the item's Artist (OPTIONAL, meta data)
196 .genre: the item's Genre (OPTIONAL, meta data)
197 .copyright: the item's Copyright (OPTIONAL, meta data)
198 .album: the item's Album (OPTIONAL, meta data)
199 .tracknum: the item's Tracknum (OPTIONAL, meta data)
200 .description: the item's Description (OPTIONAL, meta data)
201 .rating: the item's Rating (OPTIONAL, meta data)
202 .date: the item's Date (OPTIONAL, meta data)
203 .setting: the item's Setting (OPTIONAL, meta data)
204 .url: the item's URL (OPTIONAL, meta data)
205 .language: the item's Language (OPTIONAL, meta data)
206 .nowplaying: the item's NowPlaying (OPTIONAL, meta data)
207 .publisher: the item's Publisher (OPTIONAL, meta data)
208 .encodedby: the item's EncodedBy (OPTIONAL, meta data)
209 .arturl: the item's ArtURL (OPTIONAL, meta data)
210 .trackid: the item's TrackID (OPTIONAL, meta data)
211 .options: a list of VLC options (OPTIONAL)
212 example: .options = { "fullscreen" }
213 .duration: stream duration in seconds (OPTIONAL)
214 .meta: custom meta data (OPTIONAL, meta data)
215 A .meta field is a table of custom meta categories which
216 each have custom meta properties.
217 example: .meta = { ["Google video"] = { ["docid"] = "-5784010886294950089"; ["GVP version"] = "1.1" }; ["misc"] = { "Hello" = "World!" } }
218 Invalid playlist items will be discarded by VLC.
219 playlist.enqueue( ... ): like playlist.add() except that track isn't played.
220 playlist.get( [what, [tree]] ): Get the playist.
221 If "what" is a number, then this will return the corresponding playlist
222 item's playlist hierarchy. If it is "normal" or "playlist", it will
223 return the normal playlist. If it is "ml" or "media library", it will
224 return the media library. If it is "root" it will return the full playlist.
225 If it is a service discovery module's name, it will return that service
226 discovery's playlist. If it is any other string, it won't return anything.
227 Else it will return the fullplaylist.
228 The second argument, "tree", is optional. If set to true or unset, the
229 playlist will be returned in a tree layout. If set to false, the playlist
230 will be returned using the flat layout.
231 Each playlist item returned will have the following members:
233 .flags: a table with the following members if the corresponing flag is
243 .duration: (-1 if unknown)
245 .children: A table of children playlist items.
247 FIXME: add methods to get an item's meta, options, es ...
251 sd.get_services_names(): Get a table of all available service discovery
252 modules. The module name is used as key, the long name is used as value.
253 sd.add( name ): Add service discovery.
254 sd.remove( name ): Remove service discovery.
255 sd.is_loaded( name ): Check if service discovery is loaded.
259 stream( url ): Instantiate a stream object for specific url.
261 s = vlc.stream( "http://www.videolan.org/" )
262 s:read( 128 ) -- read up to 128 characters. Return 0 if no more data is available (FIXME?).
263 s:readline() -- read a line. Return nil if EOF was reached.
267 strings.decode_uri( [uri1, [uri2, [...]]] ): Decode a list of URIs. This
268 function returns as many variables as it had arguments.
269 strings.encode_uri_component( [uri1, [uri2, [...]]] ): Encode a list of URI
270 components. This function returns as many variables as it had arguments.
271 strings.resolve_xml_special_chars( [str1, [str2, [...]]] ): Resolve XML
272 special characters in a list of strings. This function returns as many
273 variables as it had arguments.
274 strings.convert_xml_special_chars( [str1, [str2, [...]]] ): Do the inverse
279 var.get( object, name ): Get the object's variable "name"'s value.
280 var.set( object, name, value ): Set the object's variable "name" to "value".
281 var.get_list( object, name ): Get the object's variable "name"'s value list.
282 1st return value is the value list, 2nd return value is the text list.
283 var.create( object, name, value ): Create and set the object's variable "name"
284 to "value". Created vars can be of type float, string or bool.
286 var.add_callback( object, name, function, data ): Add a callback to the
287 object's "name" variable. Callback functions take 4 arguments: the
288 variable name, the old value, the new value and data.
289 var.del_callback( object, name, function, data ): Delete a callback to
290 the object's "name" variable. "function" and "data" must be the same as
291 when add_callback() was called.
293 var.command( object name, name, argument ): Issue "object name"'s "name"
294 command with argument "argument".
295 var.libvlc_command( name, arguement ): Issue libvlc's "name" command with
300 video.fullscreen( [status] ):
301 * toggle fullscreen if no arguments are given
302 * switch to fullscreen 1st argument is true
303 * disable fullscreen if 1st argument is false
307 vlm(): Instanciate a VLM object.
310 v:execute_command( "new test broadcast" ) -- execute given VLM command
312 Note: if the VLM object is deleted and you were the last person to hold
313 a reference to it, all VLM items will be deleted.
317 volume.set( level ): Set volume to an absolute level between 0 and 1024.
318 volume.get(): Get volume.
319 volume.up( [n] ): Increment volume by n steps of 32. n defaults to 1.
320 volume.down( [n] ): Decrement volume by n steps of 32. n defaults to 1.