2023-02-17：sdl 是跨平台的多媒体开发库，请问用 go 语言如何调用？

package main
import (  "fmt"  "io/ioutil"  "time"  "unsafe"
  sdl "github.com/moonfdd/sdl2-go/sdl2"  "github.com/moonfdd/sdl2-go/sdlcommon")
const REFRESH_EVENT = sdl.SDL_USEREVENT + 1 // 请求画面刷新事件const QUIT_EVENT = sdl.SDL_USEREVENT + 2    // 退出事件//定义分辨率// YUV像素分辨率const YUV_WIDTH = 320const YUV_HEIGHT = 240
//定义YUV格式const YUV_FORMAT = sdl.SDL_PIXELFORMAT_IYUV
var s_thread_exit = 0 // 退出标志 = 1则退出
func main() {  sdlcommon.SetSDL2Path("SDL2.0.16.dll")  sdl.SDL_Init(sdl.SDL_INIT_VIDEO)  pixformat := YUV_FORMAT  // 分辨率  // 1. YUV的分辨率  video_width := int32(YUV_WIDTH)  video_height := int32(YUV_HEIGHT)  // 2.显示窗口的分辨率  win_width := int32(YUV_WIDTH)  win_height := int32(YUV_WIDTH)
  y_frame_len := video_width * video_height  u_frame_len := video_width * video_height / 4  v_frame_len := video_width * video_height / 4  yuv_frame_len := y_frame_len + u_frame_len + v_frame_len
  window := sdl.SDL_CreateWindow("微信公众号：福大大架构师每日一题", sdl.SDL_WINDOWPOS_UNDEFINED, sdl.SDL_WINDOWPOS_UNDEFINED, video_width, video_height, sdl.SDL_WINDOW_OPENGL|sdl.SDL_WINDOW_RESIZABLE)  if window == nil {    fmt.Printf("Can't create window, err:%s", sdl.SDL_GetError())    return  }  renderer := window.SDL_CreateRenderer(-1, 0)  texture := renderer.SDL_CreateTexture(uint32(pixformat), sdl.SDL_TEXTUREACCESS_STREAMING, video_width, video_height)  var event sdl.SDL_Event  var rect sdl.SDL_Rect  fileData, err := ioutil.ReadFile("yuv420p_320x240.yuv")  if err != nil {    fmt.Println("读取文件失败", err)    return  }  //创建请求刷新线程  go func() {    for s_thread_exit == 0 {      var event sdl.SDL_Event      event.Type = REFRESH_EVENT      event.SDL_PushEvent()      time.Sleep(40 * time.Millisecond)    }    s_thread_exit = 0    var event sdl.SDL_Event    event.Type = QUIT_EVENT    event.SDL_PushEvent()  }()
  for {    // 收取SDL系统里面的事件    event.SDL_WaitEvent()    if event.Type == REFRESH_EVENT { // 画面刷新事件      if len(fileData) < int(yuv_frame_len) {        break      }      video_buf := fileData[0:yuv_frame_len]      for i := y_frame_len; i < yuv_frame_len; i++ {        video_buf[i] = 128 //彩色变黑白      }      fileData = fileData[yuv_frame_len:]      // 设置纹理的数据 video_width = 320， plane      texture.SDL_UpdateTexture(nil, uintptr(unsafe.Pointer(&video_buf[0])), video_width)      // 显示区域，可以通过修改w和h进行缩放      rect.X = 0      rect.Y = 0      //w_ratio := win_width * 1.0 / video_width      //h_ratio := win_height * 1.0 / video_height      //// 320x240 怎么保持原视频的宽高比例      //rect.W = video_width * w_ratio      //rect.H = video_height * h_ratio      rect.W = win_width      rect.H = win_height
      // 清除当前显示      renderer.SDL_RenderClear()      // 将纹理的数据拷贝给渲染器      renderer.SDL_RenderCopy(texture, nil, &rect)      // 显示      renderer.SDL_RenderPresent()
    } else if event.Type == sdl.SDL_WINDOWEVENT {      window.SDL_GetWindowSize(&win_width, &win_height)    } else if event.Type == sdl.SDL_QUIT {      s_thread_exit = 1    } else if event.Type == QUIT_EVENT {      break    }  }  texture.SDL_DestroyTexture()  renderer.SDL_DestroyRenderer()  window.SDL_DestroyWindow()  sdl.SDL_Quit()}