gb28181打电话sip代码

以下是使用PJSIP库实现基于GB28181协议的SIP电话示例代码：

#include <pjsua-lib/pjsua.h>

const char *gb28181_server_uri = "sip:192.168.1.100:5060";

int main()
{
    pj_status_t status;
    pjsua_acc_id acc_id;
    pj_bool_t is_registered;

    // 初始化PJSUA库
    status = pjsua_create();
    if (status != PJ_SUCCESS) {
        PJ_LOG(1, ("Error initializing PJSUA: %d", status));
        return 1;
    }

    // 配置日志级别
    pjsua_config cfg;
    pjsua_config_default(&cfg);
    cfg.log_level = 5;

    // 初始化PJSUA库
    status = pjsua_init(&cfg, NULL, NULL);
    if (status != PJ_SUCCESS) {
        PJ_LOG(1, ("Error initializing PJSUA: %d", status));
        return 1;
    }

    // 添加SIP UDP传输层
    pjsua_transport_config transport_cfg;
    pjsua_transport_config_default(&transport_cfg);
    transport_cfg.port = 5060;
    status = pjsua_transport_create(PJSIP_TRANSPORT_UDP, &transport_cfg, NULL);
    if (status != PJ_SUCCESS) {
        PJ_LOG(1, ("Error creating transport: %d", status));
        return 1;
    }

    // 添加SIP账号
    pjsua_acc_config acc_cfg;
    pjsua_acc_config_default(&acc_cfg);
    acc_cfg.id = pj_str("sip:100@192.168.1.100:5060");
    acc_cfg.reg_uri = pj_str(gb28181_server_uri);
    acc_cfg.proxy[0] = pj_str(gb28181_server_uri);
    acc_cfg.transport_id = 0;
    acc_cfg.reg_retry_interval = 0;
    status = pjsua_acc_add(&acc_cfg, PJ_TRUE, &acc_id);
    if (status != PJ_SUCCESS) {
        PJ_LOG(1, ("Error adding account: %d", status));
        return 1;
    }

    // 注册SIP账号
    pjsua_acc_set_registration(acc_id, PJ_TRUE);

    // 等待注册完成
    do {
        pjsua_acc_is_registered(acc_id, &is_registered);
        pj_thread_sleep(100);
    } while (!is_registered);

    // 拨打电话
    pj_str_t dst_uri = pj_str("sip:101@192.168.1.100:5060");
    pjsua_call_id call_id;
    status = pjsua_call_make_call(acc_id, &dst_uri, NULL, NULL, NULL, &call_id);
    if (status != PJ_SUCCESS) {
        PJ_LOG(1, ("Error making call: %d", status));
        return 1;
    }

    // 等待电话结束
    do {
        pj_thread_sleep(100);
    } while (pjsua_call_is_active(call_id));

    // 销毁PJSUA库
    pjsua_destroy();

    return 0;
}

在上述示例代码中，我们通过PJSIP库实现了一个基于GB28181协议的SIP电话。代码中首先初始化了PJSUA库，然后添加了SIP UDP传输层和SIP账号，并注册了SIP账号。最后，我们通过 `pjsua_call_make_call` 函数拨打了一通电话，并等待电话结束。