diff -r 000000000000 -r 6474c204b198 media/libvpx/vp9/decoder/vp9_dboolhuff.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/libvpx/vp9/decoder/vp9_dboolhuff.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,93 @@
+/*
+ *  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.
+ */
+
+#ifndef VP9_DECODER_VP9_DBOOLHUFF_H_
+#define VP9_DECODER_VP9_DBOOLHUFF_H_
+
+#include <stddef.h>
+#include <limits.h>
+
+#include "./vpx_config.h"
+#include "vpx_ports/mem.h"
+#include "vpx/vpx_integer.h"
+
+typedef size_t VP9_BD_VALUE;
+
+#define BD_VALUE_SIZE ((int)sizeof(VP9_BD_VALUE)*CHAR_BIT)
+
+typedef struct {
+  const uint8_t *buffer_end;
+  const uint8_t *buffer;
+  VP9_BD_VALUE value;
+  int count;
+  unsigned int range;
+} vp9_reader;
+
+DECLARE_ALIGNED(16, extern const uint8_t, vp9_norm[256]);
+
+int vp9_reader_init(vp9_reader *r, const uint8_t *buffer, size_t size);
+
+void vp9_reader_fill(vp9_reader *r);
+
+const uint8_t *vp9_reader_find_end(vp9_reader *r);
+
+static int vp9_read(vp9_reader *br, int probability) {
+  unsigned int bit = 0;
+  VP9_BD_VALUE value;
+  VP9_BD_VALUE bigsplit;
+  int count;
+  unsigned int range;
+  unsigned int split = ((br->range * probability) + (256 - probability)) >> 8;
+
+  if (br->count < 0)
+    vp9_reader_fill(br);
+
+  value = br->value;
+  count = br->count;
+
+  bigsplit = (VP9_BD_VALUE)split << (BD_VALUE_SIZE - 8);
+
+  range = split;
+
+  if (value >= bigsplit) {
+    range = br->range - split;
+    value = value - bigsplit;
+    bit = 1;
+  }
+
+  {
+    register unsigned int shift = vp9_norm[range];
+    range <<= shift;
+    value <<= shift;
+    count -= shift;
+  }
+  br->value = value;
+  br->count = count;
+  br->range = range;
+
+  return bit;
+}
+
+static int vp9_read_bit(vp9_reader *r) {
+  return vp9_read(r, 128);  // vp9_prob_half
+}
+
+static int vp9_read_literal(vp9_reader *br, int bits) {
+  int z = 0, bit;
+
+  for (bit = bits - 1; bit >= 0; bit--)
+    z |= vp9_read_bit(br) << bit;
+
+  return z;
+}
+
+int vp9_reader_has_error(vp9_reader *r);
+
+#endif  // VP9_DECODER_VP9_DBOOLHUFF_H_