CUE lua demuxer.

It does not work very well but it need src/input and/or demuxer (mp3) improvments.

share/lua/playlist/cue.lua

+--[[
+   Parse CUE files
+
+ $Id$
+ Copyright (C) 2009 Laurent Aimar
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+--]]
+
+-- Probe function.
+function probe()
+	if( not string.match( string.upper( vlc.path ), ".CUE$" ) ) then
+		return false
+	end
+	header = vlc.peek( 2048 )
+	return string.match( header, "FILE.*WAVE%s[\r\n]+" ) or
+	       string.match( header, "FILE.*AIFF%s[\r\n]+" ) or
+	       string.match( header, "FILE.*MP3%s[\r\n]+" )
+end
+
+-- Helpers
+function cue_string( src )
+	local sub = string.match( src, "^\"(.*)\".*$" );
+	if( sub ) then
+		return sub
+	end
+	return string.match( src, "^(%S+).*$" )
+end
+
+function cue_path( src )
+	if( string.match( src, "^/" ) or
+		string.match( src, "^\\" ) or
+		string.match( src, "^[%l%u]:\\" ) ) then
+		return src
+	end
+
+	local path = string.gsub( vlc.path, '\\', '/' )
+	local slash = string.find( string.reverse( path ), '/' )
+	if( path == nil ) then
+		return src
+	end
+	return string.sub( path, 1, -slash-1 ) .. '/' .. src
+end
+
+function cue_track( global, track )
+	if( track.index01 == nil ) then
+		return nil
+	end
+
+	t = {}
+	t.path = cue_path( track.file or global.file )
+	t.title = track.title
+	t.album = global.title
+	t.artist = track.performer or global.performer
+	t.genre = track.genre or global.genre
+	t.date = track.date or global.date
+	t.tracknum = track.num
+	t.options = { ":start-time=" .. math.floor(track.index01) }
+
+	return t
+end
+
+function cue_append( tracks, global, track )
+	local t = cue_track( global, track )
+	if( t ~= nil ) then
+		if( #tracks > 0 ) then
+			local prev = tracks[#tracks]
+			table.insert( prev.options, ":stop-time=" .. math.floor(track.index01) )
+		end
+		table.insert( tracks, t )
+	end
+end
+
+-- Parse function.
+function parse()
+    p = {}
+	global_data = nil
+	data = {}
+	file = nil
+
+    while true
+    do 
+        line = vlc.readline()
+        if not line then break end
+
+		cmd, arg = string.match( line, "^%s*(%S+)%s*(.*)$" )
+
+		if(  cmd == "REM" and arg ) then
+			subcmd, value = string.match( arg, "^(%S+)%s*(.*)$" )
+			if( subcmd == "GENRE" and value ) then
+				data.genre = cue_string( value )
+			elseif( subcmd == "DATE" and value ) then
+				data.date = cue_string( value )
+			end
+		elseif( cmd == "PERFORMER" and arg ) then
+			data.performer = cue_string( arg )
+		elseif( cmd == "TITLE" and arg ) then
+			data.title = cue_string( arg )
+		elseif( cmd == "FILE" ) then
+			file = cue_string( arg )
+		elseif( cmd == "TRACK" ) then
+			if( not global_data ) then
+				global_data = data
+			else
+				cue_append( p, global_data, data )
+			end
+			data =  { file = file, num = string.match( arg, "^(%d+)" ) }
+		elseif( cmd == "INDEX" ) then
+			local idx, m, s, f = string.match( arg, "(%d+)%s+(%d+):(%d+):(%d+)" )
+			if( idx == "01" and m ~= nil and s ~= nil and f ~= nil ) then
+				data.index01 = m * 60 + s + f / 75
+			end
+		end
+    end
+
+	cue_append( p, global_data, data )
+
+    return p
+end
+