......
int main_push(int argc, char* argv[])
{
    void* handle = dlopen("libbaidurtc.so", RTLD_LAZY);
    if (handle == NULL) {
        fprintf(stderr, "Could not open sdk: %s\n", dlerror());
        return 1;
    }
    f_createBaiduRtcRoomClient* createClient = (f_createBaiduRtcRoomClient *)dlsym(handle, "_ZN8baidurtc24createBaiduRtcRoomClientEv");
    if (createClient == NULL) {
        fprintf(stderr, "Could not find sdk_func: %s\n", dlerror());
        return 1;
    }
    f_getVersion *version = (f_getVersion*)dlsym(handle, "getBaiduRtcSdkVersion");

    printf("BRTC.Linux.SDK Version is: %s\n",version());

    printf("Calling API\n");

    RtcParameterSettings s;

    g_BrtcClient = createClient();
    setListener(g_BrtcClient, g_myListener);

    s.HasData = false;
    s.HasVideo = true;
    s.HasAudio = true;
    s.AudioINChannel = 1;
    s.AudioINFrequency = 16000;
    s.ImageINType = RTC_IMAGE_TYPE_JPEG;
    s.AsPublisher = true;
    s.AsListener = false;
    s.AutoPublish = true;

    g_BrtcClient->setParamSettings(&s,s.RTC_PARAM_SETTINGS_ALL);
    g_BrtcClient->setAppID("GET-FROM-BAIDU");
    g_BrtcClient->setMediaServerURL("wss://rtc.exp.bcelive.com:8989/janus");
    g_BrtcClient->setCER("../bin/a.cer");

    std::string uid = std::to_string(1234500000+random()/100000);
    g_BrtcClient->loginRoom("2131",uid.c_str(),"BRTC Linux SDK push demo","token");
......