C++ voice/video conference P2P library

Hi, guys. We need a Audio/Video P2P Voice/Video conference library, this library will be used in our client software. And it must be: 1. Support 1 to 1 Voice/Video Conference 2. Support 1 to 20 Voice/Video Conference 3. The code will be vc2005 project, and running at windows xp platform. 4. This library must have API to set up the volume of sound and the quaintity of the camera 5. Must use P2P, not client/server 6. We need all source code and specification of your library API We will need this library to make voice/video chat in our client software, and we recommend you use libjingle and GIPS to do so. If you can do this, or if you have already done that before. You can just send us a little demo exe. We will test it before choose you as the winner. After we choose you as the winner, we will tell you the detail about this module. And we want the final source code and the API document for that, so we can use your library successfully. The payment will be good if you can meet our requirement, and hope that hear from you soon. Best Regards