go 接收 ffmpeg avpacket

c++部分：

typedef int(*ByteFunc)(unsigned char*, int);

MYLIBDLL int byte_url(char* url, ByteFunc tcallback(unsigned char*, int size));

AVPacket packet;

tcallback((unsigned char*)&packet.data[0],packet.size);

这个也可以：

  

   

    

     

    
    

     

        p := (*byte)(unsafe.Pointer(r))
     
    
   

    

     

    
    

     
 // 定义一个[]byte切片，用来存储C返回的字符串
     
    
   

    

     

    
    

     

       data := make([]byte,size)
     
    
   

    

     

    
    

     
 //for *p != 0 {
     
    
   

    

     

    
    

     
 for a := 0; a < size; a++ {
     
    
   

    

     

    
    

     

       data[a] =  *p
     
    
   

    

     

    
    

     

       r+=1
     
    
   

    

     

    
    

     

       p = (*byte)(unsafe.Pointer(r))
     
    
   

    

     

    
    

     

       }
     
    
  
 

  

   

    

     

    
    

     

        dll := syscall.MustLoadDLL("hik_client.dll")
     
    
   

    

     

    
    

     

       callback := syscall.NewCallback(func(r uintptr, size int) (ret uintptr) {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 //var data = make([]byte, size)
     
    
   

    

     

    
    

     
 //
     
    
   

    

     

    
    

     
 //p := (unsafe.Pointer(r))
     
    
   

    

     

    
    

     
 //q := (*[4]byte)(p)
     
    
   

    

     

    
    

     
 //copy(data[0:], (*q)[0:])
     
    
   

    

     

    
    

     

       p := (*byte)(unsafe.Pointer(r))
     
    
   

    

     

    
    

     
 // 定义一个[]byte切片，用来存储C返回的字符串
     
    
   

    

     

    
    

     

       data := make([]byte, 0)
     
    
   

    

     

    
    

     
 var index int
     
    
   

    

     

    
    

     

       index=0
     
    
   

    

     

    
    

     
 for index<size {
     
    
   

    

     

    
    

     

       data = append(data, *p)  // 将得到的byte追加到末尾
     
    
   

    

     

    
    

     

       r += unsafe.Sizeof(byte(0))  // 移动指针w，指向下一个char
     
    
   

    

     

    
    

     

       p = (*byte)(unsafe.Pointer(r))  // 获取指针的值，此时指针已经指向下一个char
     
    
   

    

     

    
    

     

       index+=1
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 //fmt.Printf("start send %d\n",size,len(data))
     
    
   

    

     

    
    

     

       err := conn.ws.WriteMessage(2,  data)
     
    
   

    

     

    
    

     
 if err != nil {
     
    
   

    

     

    
    

     

       fmt.Printf("conn.WriteMessage ERROR!!!\n")
     
    
   

    

     

    
    

     

       }
     
    
  
 

文章来源: blog.csdn.net，作者：网奇，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/jacke121/article/details/88412253