Chunk upload using blueimp jquery plugin

Chunk upload using blueimp jquery plugin

I want to upload big files (2GB+) to my WebServer using blueimp jQuery Fileupload Plugin. I handle uploads serverside with a C# UploadHandler and the Handler works correctly with chunks. My question is, if i can get the total chunks and the index of the current chunk, which is being uploaded so i can determine when the handler should start merging the temp files. I could not find anything like this in the documentation of the plugin.