VoIP Development Kit (VDK) Reference Documentation

1.0.0

This is the reference documentation for the VDK

Introduction

VDK stands for VoIP Development Kit and is a programming library that has the following goals in mind

• Simplicity
• Reliability
• Flexibility

Combining these three characteristics allow programmers to create innovative MoIP applications with ease; it is possible to focus on the application logic and not to worry about the internals of a MoIP call.

Concepts

The basic concept behind VDK is to connect various devices. Within VDK there are two types of devices:

• Input Devices
• Output Devices

Each of those categories can be divided into three sub-categories

• File Devices (Local files containing audio)
• Network Devices (Incoming and outgoing media streams from/to remote parties)
• Audio Devices (Microphones, Speakers, USB Handsets)

The flexibility of the SDK consists in the ability to connect any input device to any number output device so for example you can connect:

• a microphone device to a speaker device to have a loopback application
• a microphone device to a file writer device to record your voice
• the above examples and listen to your voice while recording it!
• an incoming network media stream to speakers and to file to record an incoming call and listen to it as well.

As you can see, writing a MoIP application has never been so easy.

The VDK relies on a configuration file vdk.ini to setup some parameters it uses for connecting such as Local Network Configuration, SIP account names and passwords, etc. Please refer to this document for in depth description of the various config file options.

A simple tutorial on how to write your first application using the VDK and the Qt libraries can be found here

A simple tutorial on how to write your first application using the VDK without the Qt libraries can be found here