Hello, I want to introduce some example code for what I personally miss in every actually flight simulator: realtime radio.
First let me introduce myself: I am a network technician working for a provider. I used flight simulators from time to time (my first one was FS2 on the Amiga and before Boing711 on a VIC-20). My job specialization is Voice over IP. I have no pilot license but I am very interested in flying around with simulators :-) I used flightgear some times and I tried FS2004. The ATC-feature of FS2004 is nice but not really good. My dream is to have an ATC-Applikation and something like a radio with different frequencies connected to other sim-flyers. My idea is to use already functionally VoIP implemenations for a radio. Why to reinvent the wheel and built proprietary protocols when we have very good software around? I have used Asterisk (http://www.asterisk.org) and configured this especially for "radio use". In VoIP you do not need necessarily a number for your destination. You can also use a string, like 119.650 (the frq of EGNX Approach). On the client side I used the libiaxclient. With this library you can build with not much effort a VoIP client which uses the IAX protocol. IAX has the advantage that you can use it very good behind NAT-Firewalls. With this small (example) client you can actaull reach 4 demonstration targets. For example: $ ./fg_com1 119.650 With this command you get a connection to the hard coded testing asterisk "ATC" server. Behind this frq there is an echo application. You hear what you say. You have to press the <blank> key for speaking. Otherwise the mic is muted. You can exit the program with the key "q". (Ok the sources are a quick hack for demonstration!) Building of the client should also be quite simple. You need the libiaxclient and libspeex. Look with ldd "inside" the binary and you can see which libraries are used or contact me. There are four frq configured: ; EDDT Tower 124.525 - Conference Room. All flyers on this frq can talk to each other ; EDDF ATIS 118.025 - A MP3 (ATIS) is played ; KLAX ATIS 133.800 - A MP3 (ATIS) is played ; EGNX Approach 119.650 - Simple echo box demo PLEASE NOTE: This is an example and I am not responsible for anything you destroy on YOUR machine! Contact me if you have problems with this code. You can find the binary and the sources of the client here: http://www.b.shuttle.de/midips/fg_com1-demo.tar.gz To my mind it is a simple and stable solution quite for larger radio networks based on asterisk. What is your opinion? Is there a chance to integrate the code into flightgear in combination with the COM1 on the screen? If there is a chance I will try to do this (with much help of the developers because I don't know the program hooks where to put the code). Possible that there is also a way to create an ATC application (as a "guest" flyer which can parse the multi user protocol). In combination with realtime radio this should be a great improvement of the multi player functions. Regards, Holger -- ##### #### ## ## Holger Wirtz Phone : (+49 30) 884299-40 ## ## ## ### ## DFN-Verein Fax : (+49 30) 884299-70 ## ## #### ###### Stresemannstr. 78 E-Mail: [EMAIL PROTECTED] ## ## ## ## ### 10963 Berlin ##### ## ## ## GERMANY WWW : http://www.dfn.de GPG-Fingerprint: ABFA 1F51 DD8D 503C 85DC 0C51 E961 79E2 6685 9BCF ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
