Remove I411 support, update doc and switch to side by side test

source/convert_to_i420.cc

 /*
  *  Copyright 2011 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 52 matching lines @@
   }
 
   // One pass rotation is available for some formats. For the rest, convert
   // to I420 (with optional vertical flipping) into a temporary I420 buffer,
   // and then rotate the I420 to the final destination buffer.
   // For in-place conversion, if destination y is same as source sample,
   // also enable temporary buffer.
   if (need_buf) {
     int y_size = crop_width * abs_crop_height;
     int uv_size = ((crop_width + 1) / 2) * ((abs_crop_height + 1) / 2);
-    rotate_buffer = (uint8*)malloc(y_size + uv_size * 2);
+    rotate_buffer = (uint8*)malloc(y_size + uv_size * 2);  /* NOLINT */
     if (!rotate_buffer) {
       return 1;  // Out of memory runtime error.
     }
     y = rotate_buffer;
     u = y + y_size;
     v = u + uv_size;
     y_stride = crop_width;
     u_stride = v_stride = ((crop_width + 1) / 2);
   }
 
@@ skipping 195 matching lines @@
       }
       r = I444ToI420(src_y, src_width,
                      src_u, src_width,
                      src_v, src_width,
                      y, y_stride,
                      u, u_stride,
                      v, v_stride,
                      crop_width, inv_crop_height);
       break;
     }
-    case FOURCC_I411: {
-      int quarterwidth = (src_width + 3) / 4;
-      const uint8* src_y = sample + src_width * crop_y + crop_x;
-      const uint8* src_u = sample + src_width * abs_src_height +
-          quarterwidth * crop_y + crop_x / 4;
-      const uint8* src_v = sample + src_width * abs_src_height +
-          quarterwidth * (abs_src_height + crop_y) + crop_x / 4;
-      r = I411ToI420(src_y, src_width,
-                     src_u, quarterwidth,
-                     src_v, quarterwidth,
-                     y, y_stride,
-                     u, u_stride,
-                     v, v_stride,
-                     crop_width, inv_crop_height);
-      break;
-    }
 #ifdef HAVE_JPEG
     case FOURCC_MJPG:
       r = MJPGToI420(sample, sample_size,
                      y, y_stride,
                      u, u_stride,
                      v, v_stride,
                      src_width, abs_src_height, crop_width, inv_crop_height);
       break;
 #endif
     default:
@@ skipping 13 matching lines @@
     free(rotate_buffer);
   }
 
   return r;
 }
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif