Maximum size of upload file using Cross Domain Library

Hi All 

I need to know what is the maximum size of file that I can upload using Cross Domain Library from my Provider hosted app. I know that in msdn it is written that usign REST call we can upload upto 2GB but I have doubts if it is true with Cross domain library REST Calls. Please suggest.

 spExecutor.executeAsync(
                           {
                               url: fileCollectionEndpoint,
                               method: "POST",
                               contentType: "application/json;odata=verbose",
                               body: filedata,
                               binaryStringRequestBody: true,
                               headers: { "X-RequestDigest": $("#__REQUESTDIGEST").val(), "accept": "application/json;odata=verbose" ........

And Can I pass ArrayBuffer directly or I need to pass only binary string ?

Thanks in Advance