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 409 matching lines @@
               8);
           vp8_post_proc_down_and_across_mb_row(
               source->v_buffer + 8 * mbr * source->uv_stride,
               source->v_buffer + 8 * mbr * source->uv_stride,
               source->uv_stride, source->uv_stride, source->uv_width, limits,
               8);
         }
     }
 }
 
-double vp8_gaussian(double sigma, double mu, double x)
+static double gaussian(double sigma, double mu, double x)
 {
     return 1 / (sigma * sqrt(2.0 * 3.14159265)) *
            (exp(-(x - mu) * (x - mu) / (2 * sigma * sigma)));
 }
 
 static void fillrd(struct postproc_state *state, int q, int a)
 {
     char char_dist[300];
 
     double sigma;
     int i;
 
     vp8_clear_system_state();
 
 
     sigma = a + .5 + .6 * (63 - q) / 63.0;
 
     /* set up a lookup table of 256 entries that matches
      * a gaussian distribution with sigma determined by q.
      */
     {
         int next, j;
 
         next = 0;
 
         for (i = -32; i < 32; i++)
         {
-            const int v = (int)(.5 + 256 * vp8_gaussian(sigma, 0, i));
+            const int v = (int)(.5 + 256 * gaussian(sigma, 0, i));
 
             if (v)
             {
                 for (j = 0; j < v; j++)
                 {
                     char_dist[next+j] = (char) i;
                 }
 
                 next = next + j;
             }
@@ skipping 728 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