internal static extern MediaContentError ForeachMedia(string groupName, MediaInfoColumnKey group, FilterHandle filter, Common.ItemCallback callback, IntPtr userData = default(IntPtr));
internal static extern MediaContentError GetMediaCount(string groupName, MediaInfoColumnKey groupType, FilterHandle filter, out int count);
internal static extern MediaContentError ForeachGroup(FilterHandle filter, MediaInfoColumnKey group, MediaGroupCallback callback, IntPtr userData = default(IntPtr));
internal static extern MediaContentError GetGroupCount(FilterHandle filter, MediaInfoColumnKey group, out int count);