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mobileapk02 · 6 years ago

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Build a Mobile Video Chat Framework With Nex Gen Media Server (NGMS) API

Release Nex Gen Media Server is best known as a multi-purpose music streaming server to deliver live and stored video with a variety of devices. The same media server can be embedded to a mobile application to facilitate real time video communication. Here we will use the NGMS API to facilitate building a video conversation client for Android devices using the Android Software Builder Kit (SDK) and Google Android Native Developer Kit (NDK). We will use NGMS to provide all of the network transport RTP services, video frame compression and decompression. NGMS will run as a natively compiled shared object used by all of our Android app. We will use a Java Native Interface (JNI) bridging layer to invoke native methods from Java application code. Pre-requisistes This article assumes that you have a basic comprehension and at least an intermediate level of experience building Android apps. I will not go over the details of setting up and Android project in an iDE such as Eclipse. If you have recently created Android apps, or at least went through some example videos you should be able to utilize this tutorial to create a real-time video internet client. If you haven't already done so , you will need to acquire the Google Android SDK (Software Developer Kit). In this case in point I used Revision 15 on a Linux 32bit appliance. The java application layer is used to create the actual Google android app. The app code will interface with a JNI layer to invoke the NGMS API routines. Know more free grammarly premium Besides you will need to download the Google Android NDK (Native Developer Kit). In this example I used Revision 6b on a Linux 32bit machine. The NDK will be used for creating the local interface layer which serves as the glue between the ancient code and Java application code. You should also have a essential understand of the C programming language.

You should first start by creating a skeleton Android application using an IDE such as Ausencia. In this example, the application will be called ngmsclient. The Espresso package name will be called com. example. ngmsclient all of which will target Android OS 2 . 3 or higher. The root undertaking directory should contain a folder called "jni" which will offer the native sources used to interface with the Java application computer. The example below assumes that you have a skeleton Android os app working and will show you how to integrate an ExampleChat class into your Android project. The Native Layer Often the NGMS core embedded library is written in T and is packaged as a shared object file. Since the Android mobile phone OS is based on Linux, the NGMS core library will certainly run natively within your Android application space. You will need to receive the NGMS core library for Android OS from the ngmsvid. com website. The essential components are the library files libngms. so , libxcode. so , and the header file ngmslib. they would. The ngms bundled. so files will be packaged with the ngmsclient. apk to provide video chat services. The JNI Layer We will build a shared library called ngmsglue. consequently which will serve as the glue between the ngms API as well as our Java application code. The structure of the Coffee Native Interface (JNI) directory within your ngmsclient project listing should look like this.

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