symbian Developer Network What's New for Developers in Symbian OS v9.4 Mark Shackman Published by the Symbian Developer Network Version:1,0-October 2007 1 INTRODUCTION. 2 ARCHITECTURAL ENHANCEMENTS... AND PAGING FOR INTERNAL FIXED STORAGE 2.2 RAM DEFRAGMENTATION. 2.3 FILE CACHING. 3 3 NEW AND EXTENDED APIS 3.1 AUDIO AND VIDEO CODEC INTERF ACE TP)OVER USB】 A 3.4 RAM DEFRAGMENTATION. 5 4 CONCLUSION 1 Introduction Symbian OS v9.4 is a major upgrade to Symbian OS,delivering a number of architectural enhancements and new or extended APIs that are of interest to developers.Key enhancements introduced since Symbian OS v9.3 include: Demand Paging for internal fixed storage-reduces RAM usage RAM Defragmentation-better memory usage and conservation of power File Caching-improved file system performance These are discussed in the following sectionsWhat's New for Developers in Symbian OS v9.4 Mark Shackman Published by the Symbian Developer Network Version: 1,0 – October 2007 1 INTRODUCTION................................................................................................................. 1 2 ARCHITECTURAL ENHANCEMENTS .............................................................................. 2 2.1 DEMAND PAGING FOR INTERNAL FIXED STORAGE.............................................................. 2 2.2 RAM DEFRAGMENTATION................................................................................................. 2 2.3 FILE CACHING .................................................................................................................. 3 3 NEW AND EXTENDED APIS ............................................................................................. 4 3.1 AUDIO AND VIDEO CODEC INTERFACE............................................................................... 4 3.2 MEDIA TRANSFER PROTOCOL (MTP) OVER USB............................................................... 4 3.3 URI WHITE/BLACK LIST SUPPORT..................................................................................... 4 3.4 RAM DEFRAGMENTATION................................................................................................. 5 4 CONCLUSION .................................................................................................................... 5 1 Introduction Symbian OS v9.4 is a major upgrade to Symbian OS, delivering a number of architectural enhancements and new or extended APIs that are of interest to developers. Key enhancements introduced since Symbian OS v9.3 include: • Demand Paging for internal fixed storage – reduces RAM usage • RAM Defragmentation – better memory usage and conservation of power • File Caching – improved file system performance These are discussed in the following sections