1. Using the svn to check out the code, 

svn co https://xavs.svn.sourceforge.net/svnroot/xavs/trunk xavs

2. Add you code on the latest version of XAVS

    If it is not the latest XAVS version, please use 

    svn update 

3. Test your code 

4. Generate your patch 

    svn diff > xxx.patch 

5. Check the format of your patch and resolve the errors 

    xavs/tools/patcheck  xxx.patch 
6. Submit the patch to XAVS-Devel mail list for checking and approval 

3. Where can we discuss the development related questions?

A. xavs-devel Mail List

     Please send mail to the mail list directly.
     xavs-develop@lists.sourceforge.net.
     If you want to subscribe to this mail list .
     General information about the mailing list is at:
     https://lists.sourceforge.net/lists/listinfo/xavs-develop

B. xavs-devel@freenode
#xavs-devel@freenode is a place to discuss questions about XAVS development.
Welcome everyone in this mail list to join this channel if you have any question.
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Instructions to Join xavs-devel channel at freenode
1. Download the xchat software
http://xchat.org/

2. Run the xchat software
    Set your nickname
    Select FreeNode
    Click Connect

3. At the bottom of the Input line, input
    /join #xavs-devel

We are there, and we can talk in this channel.
And you can also add #xavs-devel to the Favorite Channel by click the "Edit" button in Xchat Window
Then you will login in to the channel automatically for every login.
#ffmpeg-devel,#x264dev,#xavs-devel,#sourceforge