Hi all,

i am new here – so please be nice if I am asking a dumb question…

I am trying to wrap the iaxclient library to be useable with java. There is already an implementation – but quit old – and with the iaxclient v1 – not v2…

You can find the iaxclient.h here:
http://iaxclient.sourceforge.net/doc/html/iaxclient_8h.html

I have it already working to get loaded – and it does already registers with my server – but I am not able at time to handle all events correctly. I do have already done the function to install a callback for the events – the callback does also gets called – and does already get the event as it should – but the event structure is the following c code

00538 typedef struct iaxc_event_struct { 00543 struct iaxc_event_struct *next; 00544 00549 int type; 00550 00554 union { 00556 struct iaxc_ev_levels levels; 00558 struct iaxc_ev_text text; 00560 struct iaxc_ev_call_state call; 00562 struct iaxc_ev_netstats netstats; 00564 struct iaxc_ev_video_stats videostats; 00566 struct iaxc_ev_url url; 00568 struct iaxc_ev_video video; 00570 struct iaxc_ev_audio audio; 00572 struct iaxc_ev_registration reg; 00573 } ev; 00574 } iaxc_event;

With iaxc_ev_registriation 00513 struct iaxc_ev_registration { 00519 int id; 00520 00527 int reply; 00528 00532 int msgcount; 00533 };

And iaxc_ev_levels 00183 struct iaxc_ev_levels { 00187 float input; 00188 00192 float output; 00193 };

I have mapped it to

public static class iaxc_ev_registration extends Structure { public int id; public int reply; public int msgcount; }

public static class iaxc_ev_levels extends Structure { public float input; public float output; }

public static class iaxc_event_struct extends Structure { public static class ByValue extends iaxc_event_struct implements Structure.ByValue { } public Pointer next; public int type; public static class iaxc_event_union extends Union { public iaxc_ev_registration registration; public iaxc_ev_levels levels; } public iaxc_event_union ev; }

In the callback i will get the iaxc_event_struct passed correctly – I can distinguish between the event types – but then when I try to access a specific event type structure – the structure is not initialized (nulled). When i for example directly add iaxc_ev_registration instead of the union – then I will have an initialized structure in the event handler for the registration event – but can’t analyze all other events. I have read about using setType and read function to initialize the union – but it does not work.

Here is the callback function IAXClient.INSTANCE.iaxc_set_event_callback(new IAXClient.FUNCTION() { @Override public int invoke(iaxc_event_struct.ByValue event) { if (event==null) { return 0; } switch(event.type) { case IAXClient.IAXC_EVENT_REGISTRATION: System.out.println("Event Raw: " + event.ev.toString());

event.ev.setType(IAXClient.iaxc_ev_registration.class); event.ev.read(); IAXClient.iaxc_ev_registration reg = (iaxc_ev_registration) event.ev.getTypedValue(IAXClient.iaxc_ev_registration.class); System.out.println("Event Reg: " + reg.reply); break; case IAXClient.IAXC_EVENT_LEVELS: IAXClient.iaxc_ev_levels levels = (iaxc_ev_levels) event.ev.getTypedValue(IAXClient.iaxc_ev_levels.class); System.out.println("Event LEvel: " + levels.input); break; default: break; } return 0; } });

I think it will be something trivial – but I don’t get it working by myself…

Can someone here enlighten me ?

Best regards, Wolfgang