diff -r 000000000000 -r 6474c204b198 media/libvpx/vp9/encoder/vp9_variance.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/libvpx/vp9/encoder/vp9_variance.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,115 @@
+/*
+ *  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_ENCODER_VP9_VARIANCE_H_
+#define VP9_ENCODER_VP9_VARIANCE_H_
+
+#include "vpx/vpx_integer.h"
+// #include "./vpx_config.h"
+
+void variance(const uint8_t *src_ptr,
+              int  source_stride,
+              const uint8_t *ref_ptr,
+              int  recon_stride,
+              int  w,
+              int  h,
+              unsigned int *sse,
+              int *sum);
+
+typedef unsigned int(*vp9_sad_fn_t)(const uint8_t *src_ptr,
+                                    int source_stride,
+                                    const uint8_t *ref_ptr,
+                                    int ref_stride,
+                                    unsigned int max_sad);
+
+typedef unsigned int(*vp9_sad_avg_fn_t)(const uint8_t *src_ptr,
+                                        int source_stride,
+                                        const uint8_t *ref_ptr,
+                                        int ref_stride,
+                                        const uint8_t *second_pred,
+                                        unsigned int max_sad);
+
+typedef void (*vp9_sad_multi_fn_t)(const uint8_t *src_ptr,
+                                   int source_stride,
+                                   const uint8_t *ref_ptr,
+                                   int  ref_stride,
+                                   unsigned int *sad_array);
+
+typedef void (*vp9_sad_multi1_fn_t)(const uint8_t *src_ptr,
+                                    int source_stride,
+                                    const uint8_t *ref_ptr,
+                                    int  ref_stride,
+                                    unsigned int *sad_array);
+
+typedef void (*vp9_sad_multi_d_fn_t)(const uint8_t *src_ptr,
+                                     int source_stride,
+                                     const uint8_t* const ref_ptr[],
+                                     int  ref_stride, unsigned int *sad_array);
+
+typedef unsigned int (*vp9_variance_fn_t)(const uint8_t *src_ptr,
+                                          int source_stride,
+                                          const uint8_t *ref_ptr,
+                                          int ref_stride,
+                                          unsigned int *sse);
+
+typedef unsigned int (*vp9_subpixvariance_fn_t)(const uint8_t *src_ptr,
+                                                int source_stride,
+                                                int xoffset,
+                                                int yoffset,
+                                                const uint8_t *ref_ptr,
+                                                int Refstride,
+                                                unsigned int *sse);
+
+typedef unsigned int (*vp9_subp_avg_variance_fn_t)(const uint8_t *src_ptr,
+                                                   int source_stride,
+                                                   int xoffset,
+                                                   int yoffset,
+                                                   const uint8_t *ref_ptr,
+                                                   int Refstride,
+                                                   unsigned int *sse,
+                                                   const uint8_t *second_pred);
+
+typedef unsigned int (*vp9_getmbss_fn_t)(const short *);
+
+typedef unsigned int (*vp9_get16x16prederror_fn_t)(const uint8_t *src_ptr,
+                                                   int source_stride,
+                                                   const uint8_t *ref_ptr,
+                                                   int  ref_stride);
+
+typedef struct vp9_variance_vtable {
+  vp9_sad_fn_t               sdf;
+  vp9_sad_avg_fn_t           sdaf;
+  vp9_variance_fn_t          vf;
+  vp9_subpixvariance_fn_t    svf;
+  vp9_subp_avg_variance_fn_t svaf;
+  vp9_variance_fn_t          svf_halfpix_h;
+  vp9_variance_fn_t          svf_halfpix_v;
+  vp9_variance_fn_t          svf_halfpix_hv;
+  vp9_sad_multi_fn_t         sdx3f;
+  vp9_sad_multi1_fn_t        sdx8f;
+  vp9_sad_multi_d_fn_t       sdx4df;
+} vp9_variance_fn_ptr_t;
+
+static void comp_avg_pred(uint8_t *comp_pred, const uint8_t *pred, int width,
+                          int height, const uint8_t *ref, int ref_stride) {
+  int i, j;
+
+  for (i = 0; i < height; i++) {
+    for (j = 0; j < width; j++) {
+      int tmp;
+      tmp = pred[j] + ref[j];
+      comp_pred[j] = (tmp + 1) >> 1;
+    }
+    comp_pred += width;
+    pred += width;
+    ref += ref_stride;
+  }
+}
+#endif  // VP9_ENCODER_VP9_VARIANCE_H_