You have to define a pointer to the callback object (as global variable) and you have to create a callback object (and assign this object to the global callback pointer) before usage. I think you should read some basics about using c-style callbacks in C++, e.g: http://www.newty.de/fpt/callback.html#example2 regards klaus Liusheng schrieb: > I have an compile error as follow, when I used klaus's class PjCallback. > > main.cpp:(.text+0x8a): undefined reference to `globalPjCallback' > main.cpp:(.text+0xa4): undefined reference to `PjCallback::PjCallback()' > main.cpp:(.text+0xbf): undefined reference to > `PjCallback::on_incoming_call_wrapper(int, int, pjsip_rx_data*)' > main.cpp:(.text+0xc9): undefined reference to > `PjCallback::on_call_media_state_wrapper(int)' > main.cpp:(.text+0xd3): undefined reference to > `PjCallback::on_call_state_wrapper(int, pjsip_event*)' > collect2: ld returned 1 exit status > make: *** [main.o] Error 1 > > > Actually, I have defined all this function in Pjcallback class, and call > them as follow: > /* Init pjsua */ > { > pjsua_config cfg; > pjsua_logging_config log_cfg; > PjCallback *pjCallback; > globalPjCallback = pjCallback = 0; > pjCallback = new PjCallback(); > > pjsua_config_default(&cfg); > cfg.cb.on_incoming_call = > PjCallback::on_incoming_call_wrapper; //&on_incoming_call; > cfg.cb.on_call_media_state > =PjCallback::on_call_media_state_wrapper; // &on_call_media_state; > cfg.cb.on_call_state = > PjCallback::on_call_state_wrapper; //&on_call_state; > > Can you help me? > > my make file as follow: > > #Modify this to point to the PJSIP location. > PJBASE=/home/ym/legacy_project_here/pjproject-0.9.0 > include $(PJBASE)/build.mak > CC = $(APP_CC) > CC = g++ > LDFLAGS = $(APP_LDFLAGS) > LDLIBS = $(APP_LDLIBS) > CFLAGS = $(APP_CFLAGS) > CPPFLAGS= ${CFLAGS} > > # this is the line you will need to build the binary. > all: PjSourcePort.o PjSinkPort.o PjCallback.o main.o > PjSourcePort.o: PjSourcePort.cpp > PjSinkPort.o: PjSinkPort.cpp > PjCallback.o: PjCallback.cpp > main.o: main.cpp > $(CC) -o $@ $< $(CPPFLAGS) $(LDFLAGS) $(LDLIBS) > clean: > rm -f PjSourcePort.o PjSinkPort.o PjCallback.o main.o sipgw > > > > Thanks very much > > > > > > Date: Fri, 25 Jul 2008 16:27:38 +0200 > > From: klaus.mailinglists@xxxxxxxxx > > To: pjsip at lists.pjsip.org > > Subject: Re: who have the sample souce code use C++ call PJSIP? > > > > > > You can take a look at QjSImple. It is Qt based (C++), thus you can get > > an idea how it works. (With C++ you need some kind of wrapper for the C > > callbacks, otherwise there is no difference if you program in C or C++) > > > > http://www.ipcom.at/index.php?id=560 > > > > regards > > klaus > > > > Liusheng schrieb: > > > Hi,ALL: > > > > > > I want to develop c++ class to call API of PJSIP, for example; > > > pjsua_call_make_call. > > > > > > Does someone have such example souce code? could you help me? > > > > > > Thanks > > > > > > > ------------------------------------------------------------------------ > > > ???Hotmail???????? Windows Live Mail? ????? > > > <http://get.live.com/wl/all> > > > > > > > > > > ------------------------------------------------------------------------ > > > > > > _______________________________________________ > > > Visit our blog: http://blog.pjsip.org > > > > > > pjsip mailing list > > > pjsip at lists.pjsip.org > > > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > > > _______________________________________________ > > Visit our blog: http://blog.pjsip.org > > > > pjsip mailing list > > pjsip at lists.pjsip.org > > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > > ------------------------------------------------------------------------ > MSN????????????? ??????? <http://im.live.cn/minigame> > > > ------------------------------------------------------------------------ > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
