RGB565ToYuv(int Width,int Hight,unsigned char* rgb565_dat,unsigned char* yuv422_data)
{
int i,j;
int Index;
int flag = 0;
unsigned char r_dat,g_dat,b_dat;
// unsigned short* image16
unsigned char y_dat,uv_dat;
unsigned short rgb_dat;
for(i=0;i<Hight;i++)
{
  for(j=0;j<Width;j++)
  {
     Index=i*Width+j;
    
     rgb_dat = rgb565_dat[2*Index];
     rgb_dat |= rgb565_dat[2*Index+1]<<8;
    
           b_dat = ((rgb_dat & 0x001F)<<3)&0xff;
           g_dat = ((rgb_dat& 0x07E0)>>3)&0xff;
           r_dat = ((rgb_dat& 0xf800)>>8)&0xff;
           if(flag == 0)
           {  
       y_dat=(unsigned char)((299*r_dat+587*g_dat+114*b_dat)/1000);
       uv_dat=(unsigned char)(((-169)*r_dat+(-331)*g_dat+500*b_dat+128000)/1000);
           }
           else
           {
             y_dat=(unsigned char)((299*r_dat+587*g_dat+114*b_dat)/1000);
          uv_dat=(unsigned char)((500*r_dat+(-419)*g_dat+(-82)*b_dat+128000)/1000);
           }
           yuv422_data[2*Index] = y_dat;
        yuv422_data[2*Index+1] = uv_dat;
           flag = ~flag;
      
  }
}
}