nv21镜像

java 代码，可能不对

  

   

    

     

    
    

     

      //NV21: YYYY VUVU
     
    
   

    

     

    
    

     
 byte[] NV21_mirror(byte[] nv21_data, int width, int height) {
     
    
   

    

     

    
    

     
 int i;
     
    
   

    

     

    
    

     
 int left, right;
     
    
   

    

     

    
    

     
 byte temp;
     
    
   

    

     

    
    

     
 int startPos = 0;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 // mirror Y
     
    
   

    

     

    
    

     
 for (i = 0; i < height; i++) {
     
    
   

    

     

    
    

     

       left = startPos;
     
    
   

    

     

    
    

     

       right = startPos + width - 1;
     
    
   

    

     

    
    

     
 while (left < right) {
     
    
   

    

     

    
    

     

       temp = nv21_data[left];
     
    
   

    

     

    
    

     

       nv21_data[left] = nv21_data[right];
     
    
   

    

     

    
    

     

       nv21_data[right] = temp;
     
    
   

    

     

    
    

     

       left++;
     
    
   

    

     

    
    

     

       right--;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       startPos += width;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 // mirror U and V
     
    
   

    

     

    
    

     
 int offset = width * height;
     
    
   

    

     

    
    

     

       startPos = 0;
     
    
   

    

     

    
    

     
 for (i = 0; i < height / 2; i++) {
     
    
   

    

     

    
    

     

       left = offset + startPos;
     
    
   

    

     

    
    

     

       right = offset + startPos + width - 2;
     
    
   

    

     

    
    

     
 while (left < right) {
     
    
   

    

     

    
    

     

       temp = nv21_data[left];
     
    
   

    

     

    
    

     

       nv21_data[left] = nv21_data[right];
     
    
   

    

     

    
    

     

       nv21_data[right] = temp;
     
    
   

    

     

    
    

     

       left++;
     
    
   

    

     

    
    

     

       right--;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       temp = nv21_data[left];
     
    
   

    

     

    
    

     

       nv21_data[left] = nv21_data[right];
     
    
   

    

     

    
    

     

       nv21_data[right] = temp;
     
    
   

    

     

    
    

     

       left++;
     
    
   

    

     

    
    

     

       right--;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       startPos += width;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 return nv21_data;
     
    
   

    

     

    
    

     

       }
     
    
  
 

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/103313307