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