lua art: don't try too much to find some art

Move googleimage search first, and enable it again but don't use eg filename in search query.
Move musicbrainz after last.fm, and don't try more than one way to find art, also do query once in 2 sec

If you get bad hits from googleimage album-art, please report them to me.

share/Makefile.am

@@ -217,10 +217,10 @@ nobase_vlclib_DATA = \
 	lua/intf/modules/host.luac \
 	lua/intf/rc.luac \
 	lua/intf/telnet.luac \
-	lua/meta/art/01_musicbrainz.luac \
+	lua/meta/art/04_musicbrainz.luac \
 	lua/meta/art/02_frenchtv.luac \
 	lua/meta/art/03_lastfm.luac \
-	lua/meta/art/10_googleimage.luac \
+	lua/meta/art/01_googleimage.luac \
 	lua/meta/fetcher/tvrage.luac \
 	lua/meta/reader/filename.luac \
 	lua/modules/sandbox.luac \
@@ -280,10 +280,10 @@ EXTRA_DIST += \
 	lua/intf/rc.lua \
 	lua/intf/telnet.lua \
 	lua/meta/art/README.txt \
-	lua/meta/art/01_musicbrainz.lua \
+	lua/meta/art/04_musicbrainz.lua \
 	lua/meta/art/02_frenchtv.lua \
 	lua/meta/art/03_lastfm.lua \
-	lua/meta/art/10_googleimage.lua \
+	lua/meta/art/01_googleimage.lua \
 	lua/meta/fetcher/README.txt \
 	lua/meta/fetcher/tvrage.lua \
 	lua/meta/reader/README.txt \

share/lua/meta/art/10_googleimage.lua → share/lua/meta/art/01_googleimage.lua

@@ -19,40 +19,23 @@
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 --]]
 
--- Replace non alphanumeric char by +
-function get_query( title )
-    -- If we have a .EXT remove the extension.
-    str = string.gsub( title, "(.*)%....$", "%1" )
-    return string.gsub( str, "([^%w ])",
-         function (c) return string.format ("%%%02X", string.byte(c)) end)
-end
-
 -- Return the artwork
 function fetch_art()
-    -- This is disabled because we have too much false positive by the inherent nature of this script.
-    if true then vlc.msg.dbg("10_googleimage.lua is disabled") return nil end
-
-    if vlc.input == nil then return nil end
+    if vlc.item == nil then return nil end
 
-    local item = vlc.input.item()
-    local meta = item:metas()
+    local meta = vlc.item:metas()
     if meta["artist"] and meta["album"] then
         title = meta["artist"].." "..meta["album"]
     elseif meta["artist"] and meta["title"] then
         title = meta["artist"].." "..meta["title"]
-    elseif meta["title"] then
-        title = meta["title"]
-    elseif meta["filename"] then
-        title = meta["filename"]
     else
-        vlc.msg.err("No filename")
         return nil
     end
-    fd = vlc.stream( "http://images.google.com/images?q=" .. get_query( title ) )
+    fd = vlc.stream( "http://images.google.com/images?q="..vlc.strings.encode_uri_component( title.." cover" ) )
     if not fd then return nil end
 
     page = fd:read( 65653 )
     fd = nil
-    _, _, arturl = string.find( page, "imgurl=([^&]+)" )
+    _, _, arturl = string.find( page, "imgurl=([^&]*)" )
     return arturl
 end

share/lua/meta/art/01_musicbrainz.lua → share/lua/meta/art/04_musicbrainz.lua

@@ -23,9 +23,9 @@ function try_query(query)
     local l = vlc.object.libvlc()
     local t = vlc.var.get( l, "musicbrainz-previousdate" )
     if t ~= nil then
-        if t + 1000000. > vlc.misc.mdate() then
-            vlc.msg.warn( "We must wait 1 second between requests unless we want to be blacklisted from the musicbrainz server." )
-            vlc.misc.mwait( t + 1000000. )
+        if t + 2000000. > vlc.misc.mdate() then
+            vlc.msg.warn( "We must wait 2 second between requests unless we want to be blacklisted from the musicbrainz server." )
+            vlc.misc.mwait( t + 2000000. )
         end
         vlc.var.set( l, "musicbrainz-previousdate", vlc.misc.mdate() )
     else
@@ -55,7 +55,5 @@ function fetch_art()
     end
 
     local query1 = "http://musicbrainz.org/ws/1/release/?type=xml&artist="..vlc.strings.encode_uri_component(meta["artist"]).."&title=\""..vlc.strings.encode_uri_component(meta["album"].."\"")
-    local query2 = "http://musicbrainz.org/ws/1/release/?type=xml&query=\""..vlc.strings.encode_uri_component(meta["album"].."\" AND ".."artist:"..meta["artist"])
-    local query3 = "http://musicbrainz.org/ws/1/release/?type=xml&query=\""..vlc.strings.encode_uri_component(meta["album"].."\"~ AND ".."artist:"..meta["artist"].."~")
-    return try_query(query1) or try_query(query2) or try_query(query3)
+    return try_query(query1)
 end