libvpx: Pull from upstream

source/libvpx/y4minput.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.
  *
  *  Based on code from the OggTheora software codec source code,
@@ skipping 665 matching lines @@
     /*Now do the vertical filtering.*/
     y4m_422jpeg_420jpeg_helper(_dst, tmp, dst_c_w, c_h);
     _dst += dst_c_sz;
   }
 }
 
 /*The image is padded with empty chroma components at 4:2:0.*/
 static void y4m_convert_mono_420jpeg(y4m_input *_y4m, unsigned char *_dst,
                                      unsigned char *_aux) {
   int c_sz;
+  (void)_aux;
   _dst += _y4m->pic_w * _y4m->pic_h;
   c_sz = ((_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h) *
          ((_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v);
   memset(_dst, 128, c_sz * 2);
 }
 
 /*No conversion function needed.*/
 static void y4m_convert_null(y4m_input *_y4m, unsigned char *_dst,
                              unsigned char *_aux) {
+  (void)_y4m;
+  (void)_dst;
+  (void)_aux;
 }
 
 int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
                    int only_420) {
   char buffer[80];
   int  ret;
   int  i;
   /*Read until newline, or 80 cols, whichever happens first.*/
   for (i = 0; i < 79; i++) {
     if (_nskip > 0) {
@@ skipping 332 matching lines @@
   c_sz = c_w * c_h;
   _img->stride[PLANE_Y] = _img->stride[PLANE_ALPHA] =
       _y4m->pic_w * bytes_per_sample;
   _img->stride[PLANE_U] = _img->stride[PLANE_V] = c_w;
   _img->planes[PLANE_Y] = _y4m->dst_buf;
   _img->planes[PLANE_U] = _y4m->dst_buf + pic_sz;
   _img->planes[PLANE_V] = _y4m->dst_buf + pic_sz + c_sz;
   _img->planes[PLANE_ALPHA] = _y4m->dst_buf + pic_sz + 2 * c_sz;
   return 1;
 }