--- /dev/null
+Instructions to code your own VLC Lua scripts.
+$Id$
+
+1 - About Lua
+=============
+
+Lua documenation is available on http://www.lua.org . The reference manual
+is very usefull: http://www.lua.org/manual/5.1/ .
+VLC uses Lua 5.1
+All the Lua standard libraries are available.
+
+2 - Lua in VLC
+==============
+
+3 types of VLC Lua scripts can currently be coded:
+ * Playlist (see playlist/README.txt)
+ * Art fetcher (see meta/README.txt)
+ * Interface (see intf/README.txt)
+
+Lua scripts are tried in alphabetical order in the user's VLC config (FIXME)
+directory lua/{playlist,meta,intf}/ subdirectory, then in the global VLC
+lua/{playlist,meta,intf}/ directory.
+
+3 - VLC specific Lua modules
+============================
+
+All VLC specifc modules are in the "vlc" object. For example, if you want
+to use the "info" function of the "msg" VLC specific Lua module:
+vlc.msg.info( "This is an info message and will be displayed in the console" )
+
+Note: availability of the different VLC specific Lua modules depends on
+the type of VLC Lua script your are in.
+
+Access lists
+------------
+local a = vlc.acl(true) -> new ACL with default set to allow
+a:check("10.0.0.1") -> 0 == allow, 1 == deny, -1 == error
+a("10.0.0.1") -> same as a:check("10.0.0.1")
+a:duplicate() -> duplicate ACL object
+a:add_host("10.0.0.1",true) -> allow 10.0.0.1
+a:add_net("10.0.0.0",24,true) -> allow 10.0.0.0/24 (not sure)
+a:load_file("/path/to/acl") -> load ACL from file
+
+Configuration
+-------------
+config.get( name ): Get the VLC configuration option "name"'s value.
+config.set( name, value ): Set the VLC configuration option "name"'s value.
+
+HTTPd
+-----
+http( host, port, [cert, key, ca, crl]): create a new HTTP (SSL) daemon.
+
+local h = vlc.httpd( "localhost", 8080 )
+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.
+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.
+h:redirect( url_dst, url_src ): Redirect all connections from url_src to url_dst.
+
+Input
+-----
+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.
+input.is_playing(): Return true if input exists.
+input.get_title(): Get the input's name.
+input.stats(): Get statistics about the input. This is a table with the following fields:
+ .read_bytes
+ .input_bitrate
+ .demux_read_bytes
+ .demux_bitrate
+ .decoded_video
+ .displayed_pictures
+ .lost_pictures
+ .decoded_audio
+ .played_abuffers
+ .lost_abuffers
+ .sent_packets
+ .sent_bytes
+ .send_bitrate
+
+Messages
+--------
+msg.dbg( [str1, [str2, [...]]] ): Output debug messages (-vv).
+msg.warn( [str1, [str2, [...]]] ): Output warning messages (-v).
+msg.err( [str1, [str2, [...]]] ): Output error messages.
+msg.info( [str1, [str2, [...]]] ): Output info messages.
+
+Misc
+----
+misc.version(): Get the VLC version string.
+misc.copyright(): Get the VLC copyright statement.
+misc.license(): Get the VLC license.
+
+misc.datadir(): Get the VLC data directory.
+misc.userdatadir(): Get the user's VLC data directory.
+misc.homedir(): Get the user's home directory.
+misc.configdir(): Get the user's VLC config directory.
+misc.cachedir(): Get the user's VLC cache directory.
+
+misc.datadir_list( name ): FIXME: write description ... or ditch function if it isn't usefull anymore, we have datadir and userdatadir :)
+
+misc.mdate(): Get the current date (in miliseconds).
+
+misc.lock_and_wait(): Lock our object thread and wait for a wake up signal.
+misc.signal(): Wake up our object thread.
+
+misc.should_die(): Returns true if the interface should quit.
+misc.quit(): Quit VLC.
+
+Net
+---
+net.url_parse( url, [option delimiter] ): Parse URL. Returns a table with
+ fields "protocol", "username", "password", "host", "port", path" and
+ "option".
+net.listen_tcp( host, port ): Listen to TCP connections. This returns an
+ object with an accept method. This method takes an optional timeout
+ argument (in miliseconds). For example:
+local l = vlc.net.listen_tcp( "localhost", 1234 )
+while true do
+ local fd = l:accept( 500 )
+ if fd >= 0 do
+ net.send( fd, "blabla" )
+ net.close( fd )
+ end
+end
+net.close( fd ): Close file descriptor.
+net.send( fd, string, [length] ): Send data on fd.
+net.recv( fd, [max length] ): Receive data from fd.
+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".
+net.fd_set_new(): Create a new fd_set.
+local fds = vlc.net.fd_set_new()
+fds:clr( fd ) -- remove fd from set
+fds:isset( fd ) -- check if fd is set
+fds:set( fd ) -- add fd to set
+fds:zero() -- clear the set
+net.fd_read( fd, [max length] ): Read data from fd.
+net.fd_write( fd, string, [length] ): Write data to fd.
+net.stat( path ): Stat a file. Returns a table with the following fields:
+ .type
+ .mode
+ .uid
+ .gid
+ .size
+ .access_time
+ .modification_time
+ .creation_time
+net.opendir( path ): List a directory's contents.
+
+Objects
+-------
+object.input(): Get the current input object.
+object.playlist(): Get the playlist object.
+object.libvlc(): Get the libvlc object.
+
+object.find( object, type, mode ): Find an object of given type. mode can
+ be any of "parent", "child" and "anywhere". If set to "parent", it will
+ look in "object"'s parent objects. If set to "child" it will look in
+ "object"'s children. If set to "anywhere", it will look in all the
+ objects. If object is unset, the current module's object will be used.
+ Type can be: "libvlc", "module", "intf", "playlist", "input", "decoder",
+ "vout", "aout", "packetizer", "encoder", "dialogs", "announce", "demux",
+ "access", "stream", "opengl", "filter", "osdmenu", "httpd_host",
+ "interaction", "generic". This function is slow and should be avoided.
+object.find_name( object, name, mode ): Same as above except that it matches
+ on the object's name and not type. This function is also slow and should
+ be avoided if possible.
+
+OSD
+---
+osd.icon( type, [id] ): Display an icon on the given OSD channel. Uses the
+ default channel is none is given. Icon types are: "pause", "play",
+ "speaker" and "mute".
+osd.message( string, [id] ): Display text message on the given OSD channel.
+osd.slider( position, type, [id] ): Display slider. Position is an integer
+ from 0 to 100. Type can be "horizontal" or "vertical".
+osd.channel_register(): Register a new OSD channel. Returns the channel id.
+osd.channel_clear( id ): Clear OSD channel.
+
+Playlist
+--------
+playlist.prev(): Play previous track.
+playlist.next(): Play next track.
+playlist.skip( n ): Skip n tracs.
+playlist.play(): Play.
+playlist.pause(): Pause.
+playlist.stop(): Stop.
+playlist.clear(): Clear the playlist.
+playlist.repeat( [status] ): Toggle item repeat or set to specified value.
+playlist.loop( [status] ): Toggle playlist loop or set to specified value.
+playlist.random( [status] ): Toggle playlsit random or set to specified value.
+playlist.goto( id ): Go to specified track.
+playlist.add( ... ): Add a bunch of items to the playlist.
+ The playlist is a table of playlist objects.
+ A playlist object has the following members:
+ .path: the item's full path / URL
+ .name: the item's name in playlist (OPTIONAL)
+ .title: the item's Title (OPTIONAL, meta data)
+ .artist: the item's Artist (OPTIONAL, meta data)
+ .genre: the item's Genre (OPTIONAL, meta data)
+ .copyright: the item's Copyright (OPTIONAL, meta data)
+ .album: the item's Album (OPTIONAL, meta data)
+ .tracknum: the item's Tracknum (OPTIONAL, meta data)
+ .description: the item's Description (OPTIONAL, meta data)
+ .rating: the item's Rating (OPTIONAL, meta data)
+ .date: the item's Date (OPTIONAL, meta data)
+ .setting: the item's Setting (OPTIONAL, meta data)
+ .url: the item's URL (OPTIONAL, meta data)
+ .language: the item's Language (OPTIONAL, meta data)
+ .nowplaying: the item's NowPlaying (OPTIONAL, meta data)
+ .publisher: the item's Publisher (OPTIONAL, meta data)
+ .encodedby: the item's EncodedBy (OPTIONAL, meta data)
+ .arturl: the item's ArtURL (OPTIONAL, meta data)
+ .trackid: the item's TrackID (OPTIONAL, meta data)
+ .options: a list of VLC options (OPTIONAL)
+ example: .options = { "fullscreen" }
+ .duration: stream duration in seconds (OPTIONAL)
+ .meta: custom meta data (OPTIONAL, meta data)
+ A .meta field is a table of custom meta categories which
+ each have custom meta properties.
+ example: .meta = { ["Google video"] = { ["docid"] = "-5784010886294950089"; ["GVP version"] = "1.1" }; ["misc"] = { "Hello" = "World!" } }
+ Invalid playlist items will be discarded by VLC.
+playlist.enqueue( ... ): like playlist.add() except that track isn't played.
+playlist.get( [what, [tree]] ): Get the playist.
+ If "what" is a number, then this will return the corresponding playlist
+ item's playlist hierarchy. If it is "normal" or "playlist", it will
+ return the normal playlist. If it is "ml" or "media library", it will
+ return the media library. If it is "root" it will return the full playlist.
+ If it is a service discovery module's name, it will return that service
+ discovery's playlist. If it is any other string, it won't return anything.
+ Else it will return the fullplaylist.
+ The second argument, "tree", is optional. If set to true or unset, the
+ playlist will be returned in a tree layout. If set to false, the playlist
+ will be returned using the flat layout.
+ Each playlist item returned will have the following members:
+ .id: The item's id.
+ .flags: a table with the following members if the corresponing flag is
+ set:
+ .save
+ .skip
+ .disabled
+ .ro
+ .remove
+ .expanded
+ .name:
+ .path:
+ .duration: (-1 if unknown)
+ .nb_played:
+ .children: A table of children playlist items.
+
+FIXME: add methods to get an item's meta, options, es ...
+
+SD
+--
+sd.get_services_names(): Get a table of all available service discovery
+ modules. The module name is used as key, the long name is used as value.
+sd.add( name ): Add service discovery.
+sd.remove( name ): Remove service discovery.
+sd.is_loaded( name ): Check if service discovery is loaded.
+
+Stream
+------
+stream( url ): Instantiate a stream object for specific url.
+
+s = vlc.stream( "http://www.videolan.org/" )
+s:read( 128 ) -- read up to 128 characters. Return 0 if no more data is available (FIXME?).
+s:readline() -- read a line. Return nil if EOF was reached.
+
+Strings
+-------
+strings.decode_uri( [uri1, [uri2, [...]]] ): Decode a list of URIs. This
+ function returns as many variables as it had arguments.
+strings.resolve_xml_special_chars( [str1, [str2, [...]]] ): Resolve XML
+ special characters in a list of strings. This function returns as many
+ variables as it had arguments.
+strings.convert_xml_special_chars( [str1, [str2, [...]]] ): Do the inverse
+ operation.
+
+Variables
+---------
+var.get( object, name ): Get the object's variable "name"'s value.
+var.set( object, name, value ): Set the object's variable "name" to "value".
+var.get_list( object, name ): Get the object's variable "name"'s value list.
+ 1st return value is the value list, 2nd return value is the text list.
+
+var.add_callback( object, name, function, data ): Add a callback to the
+ object's "name" variable. Callback functions take 4 arguments: the
+ variable name, the old value, the new value and data.
+var.del_callback( object, name, function, data ): Delete a callback to
+ the object's "name" variable. "function" and "data" must be the same as
+ when add_callback() was called.
+
+var.command( object name, name, argument ): Issue "object name"'s "name"
+ command with argument "argument".
+var.libvlc_command( name, arguement ): Issue libvlc's "name" command with
+ argument "argument".
+
+Video
+-----
+video.fullscreen( [status] ):
+ * toggle fullscreen if no arguments are given
+ * switch to fullscreen 1st argument is true
+ * disable fullscreen if 1st argument is false
+
+VLM
+---
+vlm(): Instanciate a VLM object.
+
+v = vlc.vlm()
+v:execute_command( "new test broadcast" ) -- execute given VLM command
+
+Note: if the VLM object is deleted and you were the last person to hold
+a reference to it, all VLM items will be deleted.
+
+Volume
+------
+volume.set( level ): Set volume to an absolute level between 0 and 1024.
+volume.get(): Get volume.
+volume.up( [n] ): Increment volume by n steps of 32. n defaults to 1.
+volume.down( [n] ): Decrement volume by n steps of 32. n defaults to 1.
+
Instructions to code your own VLC Lua meta script.
$Id$
+See lua/README.txt for generic documentation about Lua usage in VLC.
+
Examples: See googleimage.lua .
VLC Lua meta modules should define one of the following functions:
* fetch_art(): returns a path to an artwork for the given item
- * fetch_meta(): returns a table with the following items:
- .path: the item's full path / URL
- .name: the item's name in playlist (OPTIONAL)
- .title: the item's Title (OPTIONAL, meta data)
- .artist: the item's Artist (OPTIONAL, meta data)
- .genre: the item's Genre (OPTIONAL, meta data)
- .copyright: the item's Copyright (OPTIONAL, meta data)
- .album: the item's Album (OPTIONAL, meta data)
- .tracknum: the item's Tracknum (OPTIONAL, meta data)
- .description: the item's Description (OPTIONAL, meta data)
- .rating: the item's Rating (OPTIONAL, meta data)
- .date: the item's Date (OPTIONAL, meta data)
- .setting: the item's Setting (OPTIONAL, meta data)
- .url: the item's URL (OPTIONAL, meta data)
- .language: the item's Language (OPTIONAL, meta data)
- .nowplaying: the item's NowPlaying (OPTIONAL, meta data)
- .publisher: the item's Publisher (OPTIONAL, meta data)
- .encodedby: the item's EncodedBy (OPTIONAL, meta data)
- .arturl: the item's ArtURL (OPTIONAL, meta data)
- .trackid: the item's TrackID (OPTIONAL, meta data)
- .options: a list of VLC options (OPTIONAL)
- example: .options = { "fullscreen" }
- .duration: stream duration in seconds (OPTIONAL)
- .meta: custom meta data (OPTIONAL, meta data)
- A .meta field is a table of custom meta categories which
- each have custom meta properties.
- example: .meta = { ["Google video"] = { ["docid"] = "-5784010886294950089"; ["GVP version"] = "1.1" }; ["misc"] = { "Hello" = "World!" } }
- Invalid playlist items will be discarded by VLC.
-
-VLC defines a global vlc object with the following members:
- * vlc.stream_new
- * vlc.stream_delete
- * vlc.stream_readline
- * vlc.stream_read
- * vlc.decode_uri( <string> ): decode %xy characters in a string.
- * vlc.resolve_xml_special_chars( <string> ): decode &abc; characters in a
- string.
- * vlc.msg_dbg( <string> ): print a debug message.
- * vlc.msg_warn( <string> ): print a warning message.
- * vlc.msg_err( <string> ): print an error message.
- * vlc.msg_info( <string> ): print an info message.
-
-Lua scripts are tried in alphabetical order in the user's VLC config
-director lua/meta/ subdirectory, then in the global VLC lua/meta/
-directory.
-Lua documentation is available on http://www.lua.org .
-VLC uses Lua 5.1
-All the Lua standard libraries are available.
+Available VLC specific Lua modules: msg, stream and strings. See lua/README.txt
Instructions to code your own VLC Lua playlist script.
$Id$
+See lua/README.txt for generic documentation about Lua usage in VLC.
+
Examples: See dailymotion.lua, googlevideo.lua, metacafe.lua, youbtube.lua
and youtube_homepage.lua .
VLC Lua playlist modules should define two functions:
* probe(): returns true if we want to handle the playlist in this script
* parse(): read the incoming data and return playlist item(s)
- The playlist is a table of playlist objects.
- A playlist object has the following members:
- .path: the item's full path / URL
- .name: the item's name in playlist (OPTIONAL)
- .title: the item's Title (OPTIONAL, meta data)
- .artist: the item's Artist (OPTIONAL, meta data)
- .genre: the item's Genre (OPTIONAL, meta data)
- .copyright: the item's Copyright (OPTIONAL, meta data)
- .album: the item's Album (OPTIONAL, meta data)
- .tracknum: the item's Tracknum (OPTIONAL, meta data)
- .description: the item's Description (OPTIONAL, meta data)
- .rating: the item's Rating (OPTIONAL, meta data)
- .date: the item's Date (OPTIONAL, meta data)
- .setting: the item's Setting (OPTIONAL, meta data)
- .url: the item's URL (OPTIONAL, meta data)
- .language: the item's Language (OPTIONAL, meta data)
- .nowplaying: the item's NowPlaying (OPTIONAL, meta data)
- .publisher: the item's Publisher (OPTIONAL, meta data)
- .encodedby: the item's EncodedBy (OPTIONAL, meta data)
- .arturl: the item's ArtURL (OPTIONAL, meta data)
- .trackid: the item's TrackID (OPTIONAL, meta data)
- .options: a list of VLC options (OPTIONAL)
- example: .options = { "fullscreen" }
- .duration: stream duration in seconds (OPTIONAL)
- .meta: custom meta data (OPTIONAL, meta data)
- A .meta field is a table of custom meta categories which
- each have custom meta properties.
- example: .meta = { ["Google video"] = { ["docid"] = "-5784010886294950089"; ["GVP version"] = "1.1" }; ["misc"] = { "Hello" = "World!" } }
- Invalid playlist items will be discarded by VLC.
+ Playlist items use the same format as that expected in the
+ playlist.add() function (see general lua/README.txt)
VLC defines a global vlc object with the following members:
* vlc.path: the URL string (without the leading http:// or file:// element)
THIS FUNCTION CANNOT BE USED IN peek().
* vlc.readline(): return a new line of playlist data on each call.
THIS FUNCTION CANNOT BE USED IN peek().
- * vlc.decode_uri( <string> ): decode %xy characters in a string.
- * vlc.resolve_xml_special_chars( <string> ): decode &abc; characters in a
- string.
- * vlc.msg_dbg( <string> ): print a debug message.
- * vlc.msg_warn( <string> ): print a warning message.
- * vlc.msg_err( <string> ): print an error message.
- * vlc.msg_info( <string> ): print an info message.
-
-Lua scripts are tried in alphabetical order in the user's VLC config
-director lua/playlist/ subdirectory, then in the global VLC lua/playlist/
-directory.
-Lua documentation is available on http://www.lua.org .
-VLC uses Lua 5.1
-All the Lua standard libraries are available.
+Available VLC specific Lua modules: msg and strings. See lua/README.txt.
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