Allowed PlayMedia from APIs and Plugin Resolves

Add Plugin resolution to PlayMedia to allow plugins to resolve to
Smart Playlists, Internet playlist streams, Last FM etc.
Modified application messenger to check attempt to play single items,
and routed them through PlayMedia instead. This allows JSON API and others
to play the item types on available through the PlayMedia function

xbmc/Application.cpp

@@ -3334,6 +3334,14 @@ void CApplication::Stop(int exitCode)
 
 bool CApplication::PlayMedia(const CFileItem& item, int iPlaylist)
 {
+  //If item is a plugin, expand out now and run ourselves again
+  if (item.IsPlugin())
+  {
+    CFileItem item_new(item);
+    if (XFILE::CPluginDirectory::GetPluginResult(item.GetPath(), item_new))
+      return PlayMedia(item_new, iPlaylist);
+    return false;
+  }
   if (item.IsLastFM())
   {
     g_partyModeManager.Disable();

xbmc/ApplicationMessenger.cpp

@@ -314,10 +314,17 @@ case TMSG_POWERDOWN:
               }
             }
 
-            g_playlistPlayer.ClearPlaylist(playlist);
-            g_playlistPlayer.Add(playlist, (*list));
-            g_playlistPlayer.SetCurrentPlaylist(playlist);
-            g_playlistPlayer.Play(pMsg->dwParam1);
+            //For single item lists try PlayMedia. This covers some more cases where a playlist is not appropriate
+            //It will fall through to PlayFile
+            if (list->Size() == 1 && !(*list)[0]->IsPlayList())
+              g_application.PlayMedia(*((*list)[0]), playlist);
+            else
+            {
+              g_playlistPlayer.ClearPlaylist(playlist);
+              g_playlistPlayer.Add(playlist, (*list));
+              g_playlistPlayer.SetCurrentPlaylist(playlist);
+              g_playlistPlayer.Play(pMsg->dwParam1);
+            }
           }
 
           delete list;