support track selection before playback

MediaBrowser.Model/Dto/BaseItemDto.cs

@@ -75,7 +75,8 @@ namespace MediaBrowser.Model.Dto
         public bool? CanDownload { get; set; }
 
         public bool? HasSubtitles { get; set; }
-        
+        public bool? SupportsMediaSourceSelection { get; set; }
+
         public string PreferredMetadataLanguage { get; set; }
         public string PreferredMetadataCountryCode { get; set; }
 

MediaBrowser.Model/Providers/SubtitleOptions.cs

@@ -13,6 +13,7 @@ namespace MediaBrowser.Model.Providers
         public bool IsOpenSubtitleVipAccount { get; set; }
 
         public bool RequirePerfectMatch { get; set; }
+        public bool SaveSubtitlesInMediaFolders { get; set; }
 
         public SubtitleOptions()
         {
@@ -20,6 +21,7 @@ namespace MediaBrowser.Model.Providers
 
             SkipIfAudioTrackMatches = true;
             RequirePerfectMatch = true;
+            SaveSubtitlesInMediaFolders = true;
         }
     }
 }

MediaBrowser.Model/Session/GeneralCommandType.cs

@@ -39,6 +39,7 @@
         ChannelDown = 31,
         SetMaxStreamingBitrate = 31,
         Guide = 32,
-        ToggleStats = 33
+        ToggleStats = 33,
+        PlayMediaSource = 34
     }
 }