ortp代码简析

/**
 *    Initialize the oRTP library. You should call this function first before using
 *    oRTP API.
**/
void ortp_init()
{
    if (ortp_initialized++) return;　　//全局初始化标志

#ifdef _WIN32
    win32_init_sockets();　　　//初始化socket
#endif

    av_profile_init(&av_profile);　　　　//注册所需的payload类型
    ortp_global_stats_reset();　　　　
    init_random_number_generator();

    ortp_message("oRTP-" ORTP_VERSION " initialized.");
}

/**
 * Gracefully uninitialize the library, including shutdowning the scheduler if it was started.
 *
**/
void ortp_exit()
{
    if (ortp_initialized==0) {
        ortp_warning("ortp_exit() called without prior call to ortp_init(), ignored.");
        return;
    }
    ortp_initialized--;
    if (ortp_initialized==0){
        if (__ortp_scheduler!=NULL)
        {
            rtp_scheduler_destroy(__ortp_scheduler);
            __ortp_scheduler=NULL;
        }
    }
}

int init_rtpservice()
{
    ortp_set_log_level_mask(ORTP_MESSAGE|ORTP_WARNING|ORTP_ERROR|ORTP_FATAL);
    ortp_set_log_handler(__logv_out);        //orpt LOG, 设置orpt日志
    ortp_init();
    return RESULT_SUCCESS;
}

int uninit_rtpservice()
{
    rtp_profile_clear_all(p_RtpProfile);
    rtp_profile_destroy(p_RtpProfile);
    ortp_exit();
    return RESULT_SUCCESS;
}