libvpx: Pull from upstream

source/libvpx/vp9/common/vp9_subpelvar.h

Index: source/libvpx/vp9/common/vp9_subpelvar.h
===================================================================
--- source/libvpx/vp9/common/vp9_subpelvar.h	(revision 232232)
+++ source/libvpx/vp9/common/vp9_subpelvar.h	(working copy)
@@ -1,145 +0,0 @@
-/*
- *  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_COMMON_VP9_SUBPELVAR_H_
-#define VP9_COMMON_VP9_SUBPELVAR_H_
-
-#include "vp9/common/vp9_common.h"
-#include "vp9/common/vp9_convolve.h"
-
-static 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) {
-  int i, j;
-  int diff;
-
-  *sum = 0;
-  *sse = 0;
-
-  for (i = 0; i < h; i++) {
-    for (j = 0; j < w; j++) {
-      diff = src_ptr[j] - ref_ptr[j];
-      *sum += diff;
-      *sse += diff * diff;
-    }
-
-    src_ptr += source_stride;
-    ref_ptr += recon_stride;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : filter_block2d_bil_first_pass
- *
- *  INPUTS        : uint8_t  *src_ptr          : Pointer to source block.
- *                  uint32_t src_pixels_per_line : Stride of input block.
- *                  uint32_t pixel_step        : Offset between filter input samples (see notes).
- *                  uint32_t output_height     : Input block height.
- *                  uint32_t output_width      : Input block width.
- *                  int32_t  *vp9_filter          : Array of 2 bi-linear filter taps.
- *
- *  OUTPUTS       : int32_t *output_ptr        : Pointer to filtered block.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Applies a 1-D 2-tap bi-linear filter to the source block in
- *                  either horizontal or vertical direction to produce the
- *                  filtered output block. Used to implement first-pass
- *                  of 2-D separable filter.
- *
- *  SPECIAL NOTES : Produces int32_t output to retain precision for next pass.
- *                  Two filter taps should sum to VP9_FILTER_WEIGHT.
- *                  pixel_step defines whether the filter is applied
- *                  horizontally (pixel_step=1) or vertically (pixel_step=stride).
- *                  It defines the offset required to move from one input
- *                  to the next.
- *
- ****************************************************************************/
-static void var_filter_block2d_bil_first_pass(const uint8_t *src_ptr,
-                                              uint16_t *output_ptr,
-                                              unsigned int src_pixels_per_line,
-                                              int pixel_step,
-                                              unsigned int output_height,
-                                              unsigned int output_width,
-                                              const int16_t *vp9_filter) {
-  unsigned int i, j;
-
-  for (i = 0; i < output_height; i++) {
-    for (j = 0; j < output_width; j++) {
-      output_ptr[j] = ROUND_POWER_OF_TWO((int)src_ptr[0] * vp9_filter[0] +
-                          (int)src_ptr[pixel_step] * vp9_filter[1],
-                          FILTER_BITS);
-
-      src_ptr++;
-    }
-
-    // Next row...
-    src_ptr    += src_pixels_per_line - output_width;
-    output_ptr += output_width;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : filter_block2d_bil_second_pass
- *
- *  INPUTS        : int32_t  *src_ptr          : Pointer to source block.
- *                  uint32_t src_pixels_per_line : Stride of input block.
- *                  uint32_t pixel_step        : Offset between filter input samples (see notes).
- *                  uint32_t output_height     : Input block height.
- *                  uint32_t output_width      : Input block width.
- *                  int32_t  *vp9_filter          : Array of 2 bi-linear filter taps.
- *
- *  OUTPUTS       : uint16_t *output_ptr       : Pointer to filtered block.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Applies a 1-D 2-tap bi-linear filter to the source block in
- *                  either horizontal or vertical direction to produce the
- *                  filtered output block. Used to implement second-pass
- *                  of 2-D separable filter.
- *
- *  SPECIAL NOTES : Requires 32-bit input as produced by filter_block2d_bil_first_pass.
- *                  Two filter taps should sum to VP9_FILTER_WEIGHT.
- *                  pixel_step defines whether the filter is applied
- *                  horizontally (pixel_step=1) or vertically (pixel_step=stride).
- *                  It defines the offset required to move from one input
- *                  to the next.
- *
- ****************************************************************************/
-static void var_filter_block2d_bil_second_pass(const uint16_t *src_ptr,
-                                               uint8_t *output_ptr,
-                                               unsigned int src_pixels_per_line,
-                                               unsigned int pixel_step,
-                                               unsigned int output_height,
-                                               unsigned int output_width,
-                                               const int16_t *vp9_filter) {
-  unsigned int  i, j;
-
-  for (i = 0; i < output_height; i++) {
-    for (j = 0; j < output_width; j++) {
-      output_ptr[j] = ROUND_POWER_OF_TWO((int)src_ptr[0] * vp9_filter[0] +
-                          (int)src_ptr[pixel_step] * vp9_filter[1],
-                          FILTER_BITS);
-      src_ptr++;
-    }
-
-    src_ptr += src_pixels_per_line - output_width;
-    output_ptr += output_width;
-  }
-}
-
-#endif  // VP9_COMMON_VP9_SUBPELVAR_H_