libvpx: Pull from upstream

source/libvpx/vp8/common/postproc.c

 /*
  *  Copyright (c) 2010 The WebM 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 657 matching lines @@
         for (j = 0; j < 2; j++)
         {
             u[j] = (u[j]*alpha + u1_const)>>16;
             v[j] = (v[j]*alpha + v1_const)>>16;
         }
         u += stride;
         v += stride;
     }
 }
 
+#if CONFIG_POSTPROC_VISUALIZER
 static void constrain_line (int x_0, int *x_1, int y_0, int *y_1, int width, int height)
 {
     int dx;
     int dy;
 
     if (*x_1 > width)
     {
         dx = *x_1 - x_0;
         dy = *y_1 - y_0;
 
@@ skipping 22 matching lines @@
     if (*y_1 < 0)
     {
         dx = *x_1 - x_0;
         dy = *y_1 - y_0;
 
         *y_1 = 0;
         if (dy)
             *x_1 = ((0-y_0)*dx)/dy + x_0;
     }
 }
+#endif  // CONFIG_POSTPROC_VISUALIZER
 
 #if CONFIG_POSTPROC
 int vp8_post_proc_frame(VP8_COMMON *oci, YV12_BUFFER_CONFIG *dest, vp8_ppflags_t *ppflags)
 {
     int q = oci->filter_level * 10 / 6;
     int flags = ppflags->post_proc_flag;
     int deblock_level = ppflags->deblocking_level;
     int noise_level = ppflags->noise_level;
 
     if (!oci->frame_to_show)
@@ skipping 467 matching lines @@
 
     *dest = oci->post_proc_buffer;
 
     /* handle problem with extending borders */
     dest->y_width = oci->Width;
     dest->y_height = oci->Height;
     dest->uv_height = dest->y_height / 2;
     return 0;
 }
 #endif