16. The method according to claim 15 , wherein the step A specifically comprises: A1: parsing an original MMS data packet and acquiring all the files in the original MMS data packet; every time a file is acquired, determining a format of the file by checking a content-type field of the file and saving the file into a file body of a corresponding format; A2: acquiring all the non-SMIL files in the parsing result and counting the number of all the non-SMIL files as a first non-SMIL file number.
16. The method according to claim 15 , wherein the step A specifically comprises: A1: parsing an original MMS data packet and acquiring all the files in the original MMS data packet; every time a file is acquired, determining a format of the file by checking a content-type field of the file and saving the file into a file body of a corresponding format; A2: acquiring all the non-SMIL files in the parsing result and counting the number of all the non-SMIL files as a first non-SMIL file number. 23. The method according to claim 16 , wherein the data structure describing a playing layout of MMS is a slide sequence structure.