你能帮我回答下一个问题吗。我正在尝试通过C API（Windows）使用Linphone进行注册和拨打电话。使用本教程，我可以单独成功注册本地SIP服务器基本注册，但我不知道如何使用本教程的基本呼叫在注册后拨打电话。问题是，基本注册代码包含在应用程序运行时执行的永恒循环：
while (running){
linphone_core_iterate(lc); /* first iterate initiates registration */
ms_usleep(50000);
}
基本调用代码还包含在应用程序运行时执行的永恒循环：
while(running){
linphone_core_iterate(lc);
ms_usleep(50000);
}
若要将基本调用代码放入第一个循环，程序将尝试一次又一次地进行调用。如何进行注册，然后拨打电话？你能帮我吗？谢谢
我的无效代码：
#ifdef IN_LINPHONE
#include "linphonecore.h"
#else
#include "linphone/linphonecore.h"
#endif
#include <signal.h>
static bool_t running = TRUE;
static void stop(int signum){
running = FALSE;
}
/*
* Call state notification callback
*/
static void call_state_changed(LinphoneCore *lc, LinphoneCall *call, LinphoneCallState cstate, const char *msg){
switch (cstate){
case LinphoneCallOutgoingRinging:
printf("It is now ringing remotely !n");
break;
case LinphoneCallOutgoingEarlyMedia:
printf("Receiving some early median");
break;
case LinphoneCallConnected:
printf("We are connected !n");
break;
case LinphoneCallStreamsRunning:
printf("Media streams established !n");
break;
case LinphoneCallEnd:
printf("Call is terminated.n");
break;
case LinphoneCallError:
printf("Call failure !");
break;
default:
printf("Unhandled notification %in", cstate);
}
}
static void registration_state_changed(struct _LinphoneCore *lc, LinphoneProxyConfig *cfg, LinphoneRegistrationState cstate, const char *message){
printf("New registration state %s for user id [%s] at proxy [%s]n"
, linphone_registration_state_to_string(cstate)
, linphone_proxy_config_get_identity(cfg)
, linphone_proxy_config_get_addr(cfg));
}
LinphoneCore *lc;
int main(int argc, char *argv[]){
LinphoneCoreVTable vtable = { 0 };
LinphoneCore *lc;
LinphoneCall *call = NULL;
const char *dest = "sip:sip2@officesip.local";
LinphoneProxyConfig* proxy_cfg;
LinphoneAddress *from;
LinphoneAuthInfo *info;
char* identity = "sip:sip@officesip.local";
char* password = "sip";
const char* server_addr;
/* takes sip uri identity from the command line arguments */
/*if (argc>1){
identity = argv[1];
}
/* takes password from the command line arguments */
/*if (argc>2){
password = argv[2];
}
*/
//signal(SIGINT, stop);
#ifdef DEBUG
linphone_core_enable_logs(NULL); /*enable liblinphone logs.*/
#endif
/*
Fill the LinphoneCoreVTable with application callbacks.
All are optional. Here we only use the registration_state_changed callbacks
in order to get notifications about the progress of the registration.
*/
vtable.registration_state_changed = registration_state_changed;
vtable.call_state_changed = call_state_changed;
/*
Instanciate a LinphoneCore object given the LinphoneCoreVTable
*/
lc = linphone_core_new(&vtable, NULL, NULL, NULL);
/*create proxy config*/
proxy_cfg = linphone_proxy_config_new();
/*parse identity*/
from = linphone_address_new(identity);
if (from == NULL){
printf("%s not a valid sip uri, must be like sip:toto@sip.linphone.org n", identity);
goto end;
}
if (password != NULL){
info = linphone_auth_info_new(linphone_address_get_username(from), NULL, password, NULL, NULL, NULL); /*create authentication structure from identity*/
linphone_core_add_auth_info(lc, info); /*add authentication info to LinphoneCore*/
}
// configure proxy entries
linphone_proxy_config_set_identity(proxy_cfg, identity); /*set identity with user name and domain*/
server_addr = linphone_address_get_domain(from); /*extract domain address from identity*/
//linphone_proxy_config_set_server_addr(proxy_cfg, server_addr); /* we assume domain = proxy server address*/
linphone_proxy_config_set_server_addr(proxy_cfg, "localhost");
linphone_proxy_config_enable_register(proxy_cfg, TRUE); /*activate registration for this proxy config*/
linphone_address_destroy(from); /*release resource*/
linphone_core_add_proxy_config(lc, proxy_cfg); /*add proxy config to linphone core*/
linphone_core_set_default_proxy(lc, proxy_cfg); /*set to default proxy*/
/* main loop for receiving notifications and doing background linphonecore work: */
while (running){
linphone_core_iterate(lc); /* first iterate initiates registration */
ms_usleep(50000);
//------------------------------------------------------------------------------------------------------
//HERE I'M TRYING TO PLACE A CALL INSIDE LOOP
//------------------------------------------------------------------------------------------------------
if (dest){
/*
Place an outgoing call
*/
call = linphone_core_invite(lc, dest);
if (call == NULL){
printf("Could not place call to %sn", dest);
goto end;
}
else printf("Call to %s is in progress...", dest);
linphone_call_ref(call);
}
//------------------------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------------------------
}
linphone_core_get_default_proxy(lc, &proxy_cfg); /* get default proxy config*/
linphone_proxy_config_edit(proxy_cfg); /*start editing proxy configuration*/
linphone_proxy_config_enable_register(proxy_cfg, FALSE); /*de-activate registration for this proxy config*/
linphone_proxy_config_done(proxy_cfg); /*initiate REGISTER with expire = 0*/
while (linphone_proxy_config_get_state(proxy_cfg) != LinphoneRegistrationCleared){
linphone_core_iterate(lc); /*to make sure we receive call backs before shutting down*/
ms_usleep(50000);
}
end:
printf("Shutting down...n");
linphone_core_destroy(lc);
printf("Exitedn");
return 0;
}
以下是本例的解决方案，使用：
/* Loop until registration is OK */
do {
linphone_core_iterate(lc); /* first iterate initiates registration */
ms_usleep(100000);
} while (running && linphone_proxy_config_get_state(proxy_cfg) == LinphoneRegistrationProgress);
而不是：
while (running){
linphone_core_iterate(lc); /* first iterate initiates registration */
ms_usleep(50000);
}
之后，我可以打电话和收发短信。