写一个deepstream c++版本推流代码

以下是一个使用DeepStream C SDK进行推流的示例代码：

#include <gst/gst.h>
#include <gst/rtsp-server/rtsp-server.h>
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

/* 定义GStreamer流管道的元素名 */
#define NVGSTDS_ELEM_DEWARPER "dewarper"
#define NVGSTDS_ELEM_SRC_CAPS_FILTER "src_caps_filter"
#define NVGSTDS_ELEM_ENCODER "encoder"
#define NVGSTDS_ELEM_MUXER "muxer"
#define NVGSTDS_ELEM_SINK "sink"

/* 定义RTSP服务器的监听端口 */
#define RTSP_SERVER_PORT 8554

/* 定义文件路径，用于将错误日志写入文件 */
#define LOG_FILE_PATH "/tmp/deepstream_push_rtsp.log"

/* 定义应用程序上下文，用于存储DeepStream元素和RTSP服务器 */
typedef struct _AppCtx {
    GstElement *pipeline;
    GstRTSPServer *server;
    GMainLoop *loop;
} AppCtx;

/* 定义用于处理RTSP客户端请求的回调函数 */
static void on_client_connected(GstRTSPServer *server, GstRTSPClient *client, gpointer user_data) {
    GstRTSPMediaFactory *factory;
    GstRTSPMediaMapping *mapping = gst_rtsp_server_get_media_mapping(server);
    factory = gst_rtsp_media_factory_new();

    /* 设置RTSP媒体工厂的元素 */
    gst_rtsp_media_factory_set_launch(factory, "(... DeepStream pipeline ...)");

    /* 将RTSP媒体工厂添加到RTSP媒体映射中 */
    gst_rtsp_media_mapping_add_factory(mapping, "/test", factory);

    /* 释放工厂和映射 */
    g_object_unref(mapping);
    g_object_unref(factory);
}

/* 定义用于处理DeepStream错误消息的回调函数 */
static void on_error(GstBus *bus, GstMessage *message, AppCtx *appCtx) {
    GError *err;
    gchar *debug_info;

    gst_message_parse_error(message, &err, &debug_info);
    g_printerr("Error received from element %s: %s\n", GST_OBJECT_NAME(message->src), err->message);
    g_printerr("Debugging information: %s\n", debug_info ? debug_info : "none");
    g_clear_error(&err);
    g_free(debug_info);

    /* 退出主循环 */
    g_main_loop_quit(appCtx->loop);
}

int main(int argc, char *argv[]) {
    GstElement *pipeline, *source, *decoder, *streammux, *dewarper, *cudadecoder, *nvvidconv, *nvh264enc, *rtph264pay, *queue, *capsfilter, *sink;
    GstBus *bus;
    GstMessage *msg;
    GstCaps *caps;
    GstRTSPServer *server;
    GstRTSPMountPoints *mounts;
    GstRTSPMediaFactory *factory;
    AppCtx appCtx;
    guint bus_watch_id;

    /* 初始化GStreamer库 */
    gst_init(&argc, &argv);

    /* 创建应用程序上下文 */
    appCtx.loop = g_main_loop_new(NULL, FALSE);
    appCtx.server = NULL;

    /* 创建GStreamer流管道 */
    pipeline = gst_pipeline_new(NULL);

    /* 创建GStreamer元素