Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

11 files changed, 1686 insertions, 0 deletions

diff --git a/third_party/aom/aom_scale/aom_scale.cmake b/third_party/aom/aom_scale/aom_scale.cmake
new file mode 100644
index 000000000..a6aa31afc
--- /dev/null
+++ b/third_party/aom/aom_scale/aom_scale.cmake
@@ -0,0 +1,34 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+set(AOM_SCALE_SOURCES
+    "${AOM_ROOT}/aom_scale/aom_scale.h"
+    "${AOM_ROOT}/aom_scale/generic/aom_scale.c"
+    "${AOM_ROOT}/aom_scale/generic/gen_scalers.c"
+    "${AOM_ROOT}/aom_scale/generic/yv12config.c"
+    "${AOM_ROOT}/aom_scale/generic/yv12extend.c"
+    "${AOM_ROOT}/aom_scale/yv12config.h")
+
+set(AOM_SCALE_INTRIN_DSPR2
+    "${AOM_ROOT}/aom_scale/mips/dspr2/yv12extend_dspr2.c")
+
+# Creates the aom_scale build target and makes libaom depend on it. The libaom
+# target must exist before this function is called.
+function (setup_aom_scale_targets)
+  add_library(aom_scale OBJECT ${AOM_SCALE_SOURCES})
+  target_sources(aom PUBLIC $<TARGET_OBJECTS:aom_scale>)
+
+  if (HAVE_DSPR2)
+    add_intrinsics_object_library("" "dspr2" "aom_scale"
+                                  "AOM_SCALE_INTRIN_DSPR2")
+  endif ()
+
+  set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} aom_scale PARENT_SCOPE)
+endfunction ()
diff --git a/third_party/aom/aom_scale/aom_scale.h b/third_party/aom/aom_scale/aom_scale.h
new file mode 100644
index 000000000..6e089f5aa
--- /dev/null
+++ b/third_party/aom/aom_scale/aom_scale.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_SCALE_AOM_SCALE_H_
+#define AOM_SCALE_AOM_SCALE_H_
+
+#include "aom_scale/yv12config.h"
+
+extern void aom_scale_frame(YV12_BUFFER_CONFIG *src, YV12_BUFFER_CONFIG *dst,
+                            unsigned char *temp_area, unsigned char temp_height,
+                            unsigned int hscale, unsigned int hratio,
+                            unsigned int vscale, unsigned int vratio,
+                            unsigned int interlaced);
+
+#endif  // AOM_SCALE_AOM_SCALE_H_
diff --git a/third_party/aom/aom_scale/aom_scale.mk b/third_party/aom/aom_scale/aom_scale.mk
new file mode 100644
index 000000000..e3a68cfcf
--- /dev/null
+++ b/third_party/aom/aom_scale/aom_scale.mk
@@ -0,0 +1,16 @@
+SCALE_SRCS-yes += aom_scale.mk
+SCALE_SRCS-yes += yv12config.h
+SCALE_SRCS-$(CONFIG_SPATIAL_RESAMPLING) += aom_scale.h
+SCALE_SRCS-$(CONFIG_SPATIAL_RESAMPLING) += generic/aom_scale.c
+SCALE_SRCS-yes += generic/yv12config.c
+SCALE_SRCS-yes += generic/yv12extend.c
+SCALE_SRCS-$(CONFIG_SPATIAL_RESAMPLING) += generic/gen_scalers.c
+SCALE_SRCS-yes += aom_scale_rtcd.c
+SCALE_SRCS-yes += aom_scale_rtcd.pl
+
+#mips(dspr2)
+SCALE_SRCS-$(HAVE_DSPR2)  += mips/dspr2/yv12extend_dspr2.c
+
+SCALE_SRCS-no += $(SCALE_SRCS_REMOVE-yes)
+
+$(eval $(call rtcd_h_template,aom_scale_rtcd,aom_scale/aom_scale_rtcd.pl))
diff --git a/third_party/aom/aom_scale/aom_scale_rtcd.c b/third_party/aom/aom_scale/aom_scale_rtcd.c
new file mode 100644
index 000000000..dec23735b
--- /dev/null
+++ b/third_party/aom/aom_scale/aom_scale_rtcd.c
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+#include "./aom_config.h"
+#define RTCD_C
+#include "./aom_scale_rtcd.h"
+#include "aom_ports/aom_once.h"
+
+void aom_scale_rtcd() { once(setup_rtcd_internal); }
diff --git a/third_party/aom/aom_scale/aom_scale_rtcd.pl b/third_party/aom/aom_scale/aom_scale_rtcd.pl
new file mode 100644
index 000000000..9d9a1a29a
--- /dev/null
+++ b/third_party/aom/aom_scale/aom_scale_rtcd.pl
@@ -0,0 +1,38 @@
+sub aom_scale_forward_decls() {
+print <<EOF
+struct yv12_buffer_config;
+EOF
+}
+forward_decls qw/aom_scale_forward_decls/;
+
+# Scaler functions
+if (aom_config("CONFIG_SPATIAL_RESAMPLING") eq "yes") {
+    add_proto qw/void aom_horizontal_line_5_4_scale/, "const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width";
+    add_proto qw/void aom_vertical_band_5_4_scale/, "unsigned char *source, int src_pitch, unsigned char *dest, int dest_pitch, unsigned int dest_width";
+    add_proto qw/void aom_horizontal_line_5_3_scale/, "const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width";
+    add_proto qw/void aom_vertical_band_5_3_scale/, "unsigned char *source, int src_pitch, unsigned char *dest, int dest_pitch, unsigned int dest_width";
+    add_proto qw/void aom_horizontal_line_2_1_scale/, "const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width";
+    add_proto qw/void aom_vertical_band_2_1_scale/, "unsigned char *source, int src_pitch, unsigned char *dest, int dest_pitch, unsigned int dest_width";
+    add_proto qw/void aom_vertical_band_2_1_scale_i/, "unsigned char *source, int src_pitch, unsigned char *dest, int dest_pitch, unsigned int dest_width";
+}
+
+add_proto qw/void aom_yv12_extend_frame_borders/, "struct yv12_buffer_config *ybf";
+
+add_proto qw/void aom_yv12_copy_frame/, "const struct yv12_buffer_config *src_bc, struct yv12_buffer_config *dst_bc";
+
+add_proto qw/void aom_yv12_copy_y/, "const struct yv12_buffer_config *src_ybc, struct yv12_buffer_config *dst_ybc";
+
+add_proto qw/void aom_yv12_copy_u/, "const struct yv12_buffer_config *src_bc, struct yv12_buffer_config *dst_bc";
+
+add_proto qw/void aom_yv12_copy_v/, "const struct yv12_buffer_config *src_bc, struct yv12_buffer_config *dst_bc";
+
+if (aom_config("CONFIG_AV1") eq "yes") {
+    add_proto qw/void aom_extend_frame_borders/, "struct yv12_buffer_config *ybf";
+    specialize qw/aom_extend_frame_borders dspr2/;
+
+    add_proto qw/void aom_extend_frame_inner_borders/, "struct yv12_buffer_config *ybf";
+    specialize qw/aom_extend_frame_inner_borders dspr2/;
+
+    add_proto qw/void aom_extend_frame_borders_y/, "struct yv12_buffer_config *ybf";
+}
+1;
diff --git a/third_party/aom/aom_scale/generic/aom_scale.c b/third_party/aom/aom_scale/generic/aom_scale.c
new file mode 100644
index 000000000..14f3ae0da
--- /dev/null
+++ b/third_party/aom/aom_scale/generic/aom_scale.c
@@ -0,0 +1,529 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+/****************************************************************************
+ *
+ *   Module Title :     scale.c
+ *
+ *   Description  :     Image scaling functions.
+ *
+ ***************************************************************************/
+
+/****************************************************************************
+*  Header Files
+****************************************************************************/
+#include "./aom_scale_rtcd.h"
+#include "aom_mem/aom_mem.h"
+#include "aom_scale/aom_scale.h"
+#include "aom_scale/yv12config.h"
+
+typedef struct {
+  int expanded_frame_width;
+  int expanded_frame_height;
+
+  int HScale;
+  int HRatio;
+  int VScale;
+  int VRatio;
+
+  YV12_BUFFER_CONFIG *src_yuv_config;
+  YV12_BUFFER_CONFIG *dst_yuv_config;
+
+} SCALE_VARS;
+
+/****************************************************************************
+ *
+ *  ROUTINE       : scale1d_2t1_i
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to data to be scaled.
+ *                  int source_step             : Number of pixels to step on
+ *                                                in source.
+ *                  unsigned int source_scale   : Scale for source (UNUSED).
+ *                  unsigned int source_length  : Length of source (UNUSED).
+ *                  unsigned char *dest         : Pointer to output data array.
+ *                  int dest_step               : Number of pixels to step on
+ *                                                in destination.
+ *                  unsigned int dest_scale     : Scale for destination
+ *                                                (UNUSED).
+ *                  unsigned int dest_length    : Length of destination.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs 2-to-1 interpolated scaling.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static void scale1d_2t1_i(const unsigned char *source, int source_step,
+                          unsigned int source_scale, unsigned int source_length,
+                          unsigned char *dest, int dest_step,
+                          unsigned int dest_scale, unsigned int dest_length) {
+  const unsigned char *const dest_end = dest + dest_length * dest_step;
+  (void)source_length;
+  (void)source_scale;
+  (void)dest_scale;
+
+  source_step *= 2;  // Every other row.
+
+  dest[0] = source[0];  // Special case: 1st pixel.
+  source += source_step;
+  dest += dest_step;
+
+  while (dest < dest_end) {
+    const unsigned int a = 3 * source[-source_step];
+    const unsigned int b = 10 * source[0];
+    const unsigned int c = 3 * source[source_step];
+    *dest = (unsigned char)((8 + a + b + c) >> 4);
+    source += source_step;
+    dest += dest_step;
+  }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : scale1d_2t1_ps
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to data to be scaled.
+ *                  int source_step             : Number of pixels to step on
+ *                                                in source.
+ *                  unsigned int source_scale   : Scale for source (UNUSED).
+ *                  unsigned int source_length  : Length of source (UNUSED).
+ *                  unsigned char *dest         : Pointer to output data array.
+ *                  int dest_step               : Number of pixels to step on
+ *                                                in destination.
+ *                  unsigned int dest_scale     : Scale for destination
+ *                                                (UNUSED).
+ *                  unsigned int dest_length    : Length of destination.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs 2-to-1 point subsampled scaling.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static void scale1d_2t1_ps(const unsigned char *source, int source_step,
+                           unsigned int source_scale,
+                           unsigned int source_length, unsigned char *dest,
+                           int dest_step, unsigned int dest_scale,
+                           unsigned int dest_length) {
+  const unsigned char *const dest_end = dest + dest_length * dest_step;
+  (void)source_length;
+  (void)source_scale;
+  (void)dest_scale;
+
+  source_step *= 2;  // Every other row.
+
+  while (dest < dest_end) {
+    *dest = *source;
+    source += source_step;
+    dest += dest_step;
+  }
+}
+/****************************************************************************
+ *
+ *  ROUTINE       : scale1d_c
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to data to be scaled.
+ *                  int source_step             : Number of pixels to step on
+ *                                                in source.
+ *                  unsigned int source_scale   : Scale for source.
+ *                  unsigned int source_length  : Length of source (UNUSED).
+ *                  unsigned char *dest         : Pointer to output data array.
+ *                  int dest_step               : Number of pixels to step on
+ *                                                in destination.
+ *                  unsigned int dest_scale     : Scale for destination.
+ *                  unsigned int dest_length    : Length of destination.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs linear interpolation in one dimension.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static void scale1d_c(const unsigned char *source, int source_step,
+                      unsigned int source_scale, unsigned int source_length,
+                      unsigned char *dest, int dest_step,
+                      unsigned int dest_scale, unsigned int dest_length) {
+  const unsigned char *const dest_end = dest + dest_length * dest_step;
+  const unsigned int round_value = dest_scale / 2;
+  unsigned int left_modifier = dest_scale;
+  unsigned int right_modifier = 0;
+  unsigned char left_pixel = source[0];
+  unsigned char right_pixel = source[source_step];
+
+  (void)source_length;
+
+  /* These asserts are needed if there are boundary issues... */
+  /* assert ( dest_scale > source_scale );*/
+  /* assert ( (source_length - 1) * dest_scale >= (dest_length - 1) *
+   * source_scale);*/
+
+  while (dest < dest_end) {
+    *dest = (unsigned char)((left_modifier * left_pixel +
+                             right_modifier * right_pixel + round_value) /
+                            dest_scale);
+
+    right_modifier += source_scale;
+
+    while (right_modifier > dest_scale) {
+      right_modifier -= dest_scale;
+      source += source_step;
+      left_pixel = source[0];
+      right_pixel = source[source_step];
+    }
+
+    left_modifier = dest_scale - right_modifier;
+  }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : Scale2D
+ *
+ *  INPUTS        : const unsigned char *source    : Pointer to data to be
+ *                                                   scaled.
+ *                  int source_pitch               : Stride of source image.
+ *                  unsigned int source_width      : Width of input image.
+ *                  unsigned int source_height     : Height of input image.
+ *                  unsigned char *dest            : Pointer to output data
+ *                                                   array.
+ *                  int dest_pitch                 : Stride of destination
+ *                                                   image.
+ *                  unsigned int dest_width        : Width of destination image.
+ *                  unsigned int dest_height       : Height of destination
+ *                                                   image.
+ *                  unsigned char *temp_area       : Pointer to temp work area.
+ *                  unsigned char temp_area_height : Height of temp work area.
+ *                  unsigned int hscale            : Horizontal scale factor
+ *                                                   numerator.
+ *                  unsigned int hratio            : Horizontal scale factor
+ *                                                   denominator.
+ *                  unsigned int vscale            : Vertical scale factor
+ *                                                   numerator.
+ *                  unsigned int vratio            : Vertical scale factor
+ *                                                   denominator.
+ *                  unsigned int interlaced        : Interlace flag.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs 2-tap linear interpolation in two dimensions.
+ *
+ *  SPECIAL NOTES : Expansion is performed one band at a time to help with
+ *                  caching.
+ *
+ ****************************************************************************/
+static void Scale2D(
+    /*const*/
+    unsigned char *source, int source_pitch, unsigned int source_width,
+    unsigned int source_height, unsigned char *dest, int dest_pitch,
+    unsigned int dest_width, unsigned int dest_height, unsigned char *temp_area,
+    unsigned char temp_area_height, unsigned int hscale, unsigned int hratio,
+    unsigned int vscale, unsigned int vratio, unsigned int interlaced) {
+  unsigned int i, j, k;
+  unsigned int bands;
+  unsigned int dest_band_height;
+  unsigned int source_band_height;
+
+  typedef void (*Scale1D)(const unsigned char *source, int source_step,
+                          unsigned int source_scale, unsigned int source_length,
+                          unsigned char *dest, int dest_step,
+                          unsigned int dest_scale, unsigned int dest_length);
+
+  Scale1D Scale1Dv = scale1d_c;
+  Scale1D Scale1Dh = scale1d_c;
+
+  void (*horiz_line_scale)(const unsigned char *, unsigned int, unsigned char *,
+                           unsigned int) = NULL;
+  void (*vert_band_scale)(unsigned char *, int, unsigned char *, int,
+                          unsigned int) = NULL;
+
+  int ratio_scalable = 1;
+  int interpolation = 0;
+
+  unsigned char *source_base;
+  unsigned char *line_src;
+
+  source_base = (unsigned char *)source;
+
+  if (source_pitch < 0) {
+    int offset;
+
+    offset = (source_height - 1);
+    offset *= source_pitch;
+
+    source_base += offset;
+  }
+
+  /* find out the ratio for each direction */
+  switch (hratio * 10 / hscale) {
+    case 8:
+      /* 4-5 Scale in Width direction */
+      horiz_line_scale = aom_horizontal_line_5_4_scale;
+      break;
+    case 6:
+      /* 3-5 Scale in Width direction */
+      horiz_line_scale = aom_horizontal_line_5_3_scale;
+      break;
+    case 5:
+      /* 1-2 Scale in Width direction */
+      horiz_line_scale = aom_horizontal_line_2_1_scale;
+      break;
+    default:
+      /* The ratio is not acceptable now */
+      /* throw("The ratio is not acceptable for now!"); */
+      ratio_scalable = 0;
+      break;
+  }
+
+  switch (vratio * 10 / vscale) {
+    case 8:
+      /* 4-5 Scale in vertical direction */
+      vert_band_scale = aom_vertical_band_5_4_scale;
+      source_band_height = 5;
+      dest_band_height = 4;
+      break;
+    case 6:
+      /* 3-5 Scale in vertical direction */
+      vert_band_scale = aom_vertical_band_5_3_scale;
+      source_band_height = 5;
+      dest_band_height = 3;
+      break;
+    case 5:
+      /* 1-2 Scale in vertical direction */
+
+      if (interlaced) {
+        /* if the content is interlaced, point sampling is used */
+        vert_band_scale = aom_vertical_band_2_1_scale;
+      } else {
+        interpolation = 1;
+        /* if the content is progressive, interplo */
+        vert_band_scale = aom_vertical_band_2_1_scale_i;
+      }
+
+      source_band_height = 2;
+      dest_band_height = 1;
+      break;
+    default:
+      /* The ratio is not acceptable now */
+      /* throw("The ratio is not acceptable for now!"); */
+      ratio_scalable = 0;
+      break;
+  }
+
+  if (ratio_scalable) {
+    if (source_height == dest_height) {
+      /* for each band of the image */
+      for (k = 0; k < dest_height; ++k) {
+        horiz_line_scale(source, source_width, dest, dest_width);
+        source += source_pitch;
+        dest += dest_pitch;
+      }
+
+      return;
+    }
+
+    if (interpolation) {
+      if (source < source_base) source = source_base;
+
+      horiz_line_scale(source, source_width, temp_area, dest_width);
+    }
+
+    for (k = 0; k < (dest_height + dest_band_height - 1) / dest_band_height;
+         ++k) {
+      /* scale one band horizontally */
+      for (i = 0; i < source_band_height; ++i) {
+        /* Trap case where we could read off the base of the source buffer */
+
+        line_src = source + i * source_pitch;
+
+        if (line_src < source_base) line_src = source_base;
+
+        horiz_line_scale(line_src, source_width,
+                         temp_area + (i + 1) * dest_pitch, dest_width);
+      }
+
+      /* Vertical scaling is in place */
+      vert_band_scale(temp_area + dest_pitch, dest_pitch, dest, dest_pitch,
+                      dest_width);
+
+      if (interpolation)
+        memcpy(temp_area, temp_area + source_band_height * dest_pitch,
+               dest_width);
+
+      /* Next band... */
+      source += (unsigned long)source_band_height * source_pitch;
+      dest += (unsigned long)dest_band_height * dest_pitch;
+    }
+
+    return;
+  }
+
+  if (hscale == 2 && hratio == 1) Scale1Dh = scale1d_2t1_ps;
+
+  if (vscale == 2 && vratio == 1) {
+    if (interlaced)
+      Scale1Dv = scale1d_2t1_ps;
+    else
+      Scale1Dv = scale1d_2t1_i;
+  }
+
+  if (source_height == dest_height) {
+    /* for each band of the image */
+    for (k = 0; k < dest_height; ++k) {
+      Scale1Dh(source, 1, hscale, source_width + 1, dest, 1, hratio,
+               dest_width);
+      source += source_pitch;
+      dest += dest_pitch;
+    }
+
+    return;
+  }
+
+  if (dest_height > source_height) {
+    dest_band_height = temp_area_height - 1;
+    source_band_height = dest_band_height * source_height / dest_height;
+  } else {
+    source_band_height = temp_area_height - 1;
+    dest_band_height = source_band_height * vratio / vscale;
+  }
+
+  /* first row needs to be done so that we can stay one row ahead for vertical
+   * zoom */
+  Scale1Dh(source, 1, hscale, source_width + 1, temp_area, 1, hratio,
+           dest_width);
+
+  /* for each band of the image */
+  bands = (dest_height + dest_band_height - 1) / dest_band_height;
+
+  for (k = 0; k < bands; ++k) {
+    /* scale one band horizontally */
+    for (i = 1; i < source_band_height + 1; ++i) {
+      if (k * source_band_height + i < source_height) {
+        Scale1Dh(source + i * source_pitch, 1, hscale, source_width + 1,
+                 temp_area + i * dest_pitch, 1, hratio, dest_width);
+      } else { /*  Duplicate the last row */
+        /* copy temp_area row 0 over from last row in the past */
+        memcpy(temp_area + i * dest_pitch, temp_area + (i - 1) * dest_pitch,
+               dest_pitch);
+      }
+    }
+
+    /* scale one band vertically */
+    for (j = 0; j < dest_width; ++j) {
+      Scale1Dv(&temp_area[j], dest_pitch, vscale, source_band_height + 1,
+               &dest[j], dest_pitch, vratio, dest_band_height);
+    }
+
+    /* copy temp_area row 0 over from last row in the past */
+    memcpy(temp_area, temp_area + source_band_height * dest_pitch, dest_pitch);
+
+    /* move to the next band */
+    source += source_band_height * source_pitch;
+    dest += dest_band_height * dest_pitch;
+  }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : aom_scale_frame
+ *
+ *  INPUTS        : YV12_BUFFER_CONFIG *src        : Pointer to frame to be
+ *                                                   scaled.
+ *                  YV12_BUFFER_CONFIG *dst        : Pointer to buffer to hold
+ *                                                   scaled frame.
+ *                  unsigned char *temp_area       : Pointer to temp work area.
+ *                  unsigned char temp_area_height : Height of temp work area.
+ *                  unsigned int hscale            : Horizontal scale factor
+ *                                                   numerator.
+ *                  unsigned int hratio            : Horizontal scale factor
+ *                                                   denominator.
+ *                  unsigned int vscale            : Vertical scale factor
+ *                                                   numerator.
+ *                  unsigned int vratio            : Vertical scale factor
+ *                                                   denominator.
+ *                  unsigned int interlaced        : Interlace flag.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs 2-tap linear interpolation in two dimensions.
+ *
+ *  SPECIAL NOTES : Expansion is performed one band at a time to help with
+ *                  caching.
+ *
+ ****************************************************************************/
+void aom_scale_frame(YV12_BUFFER_CONFIG *src, YV12_BUFFER_CONFIG *dst,
+                     unsigned char *temp_area, unsigned char temp_height,
+                     unsigned int hscale, unsigned int hratio,
+                     unsigned int vscale, unsigned int vratio,
+                     unsigned int interlaced) {
+  int i;
+  int dw = (hscale - 1 + src->y_width * hratio) / hscale;
+  int dh = (vscale - 1 + src->y_height * vratio) / vscale;
+
+  /* call our internal scaling routines!! */
+  Scale2D((unsigned char *)src->y_buffer, src->y_stride, src->y_width,
+          src->y_height, (unsigned char *)dst->y_buffer, dst->y_stride, dw, dh,
+          temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced);
+
+  if (dw < (int)dst->y_width)
+    for (i = 0; i < dh; ++i)
+      memset(dst->y_buffer + i * dst->y_stride + dw - 1,
+             dst->y_buffer[i * dst->y_stride + dw - 2], dst->y_width - dw + 1);
+
+  if (dh < (int)dst->y_height)
+    for (i = dh - 1; i < (int)dst->y_height; ++i)
+      memcpy(dst->y_buffer + i * dst->y_stride,
+             dst->y_buffer + (dh - 2) * dst->y_stride, dst->y_width + 1);
+
+  Scale2D((unsigned char *)src->u_buffer, src->uv_stride, src->uv_width,
+          src->uv_height, (unsigned char *)dst->u_buffer, dst->uv_stride,
+          dw / 2, dh / 2, temp_area, temp_height, hscale, hratio, vscale,
+          vratio, interlaced);
+
+  if (dw / 2 < (int)dst->uv_width)
+    for (i = 0; i < dst->uv_height; ++i)
+      memset(dst->u_buffer + i * dst->uv_stride + dw / 2 - 1,
+             dst->u_buffer[i * dst->uv_stride + dw / 2 - 2],
+             dst->uv_width - dw / 2 + 1);
+
+  if (dh / 2 < (int)dst->uv_height)
+    for (i = dh / 2 - 1; i < (int)dst->y_height / 2; ++i)
+      memcpy(dst->u_buffer + i * dst->uv_stride,
+             dst->u_buffer + (dh / 2 - 2) * dst->uv_stride, dst->uv_width);
+
+  Scale2D((unsigned char *)src->v_buffer, src->uv_stride, src->uv_width,
+          src->uv_height, (unsigned char *)dst->v_buffer, dst->uv_stride,
+          dw / 2, dh / 2, temp_area, temp_height, hscale, hratio, vscale,
+          vratio, interlaced);
+
+  if (dw / 2 < (int)dst->uv_width)
+    for (i = 0; i < dst->uv_height; ++i)
+      memset(dst->v_buffer + i * dst->uv_stride + dw / 2 - 1,
+             dst->v_buffer[i * dst->uv_stride + dw / 2 - 2],
+             dst->uv_width - dw / 2 + 1);
+
+  if (dh / 2 < (int)dst->uv_height)
+    for (i = dh / 2 - 1; i < (int)dst->y_height / 2; ++i)
+      memcpy(dst->v_buffer + i * dst->uv_stride,
+             dst->v_buffer + (dh / 2 - 2) * dst->uv_stride, dst->uv_width);
+}
diff --git a/third_party/aom/aom_scale/generic/gen_scalers.c b/third_party/aom/aom_scale/generic/gen_scalers.c
new file mode 100644
index 000000000..71fa82f30
--- /dev/null
+++ b/third_party/aom/aom_scale/generic/gen_scalers.c
@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include "./aom_scale_rtcd.h"
+#include "aom_scale/aom_scale.h"
+#include "aom_mem/aom_mem.h"
+/****************************************************************************
+*  Imports
+****************************************************************************/
+
+/****************************************************************************
+ *
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to source data.
+ *                  unsigned int source_width   : Stride of source.
+ *                  unsigned char *dest         : Pointer to destination data.
+ *                  unsigned int dest_width     : Stride of destination
+ *                                                (NOT USED).
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Copies horizontal line of pixels from source to
+ *                  destination scaling up by 4 to 5.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+void aom_horizontal_line_5_4_scale_c(const unsigned char *source,
+                                     unsigned int source_width,
+                                     unsigned char *dest,
+                                     unsigned int dest_width) {
+  const unsigned char *const source_end = source + source_width;
+  (void)dest_width;
+
+  while (source < source_end) {
+    const unsigned int a = source[0];
+    const unsigned int b = source[1];
+    const unsigned int c = source[2];
+    const unsigned int d = source[3];
+    const unsigned int e = source[4];
+
+    dest[0] = (unsigned char)a;
+    dest[1] = (unsigned char)((b * 192 + c * 64 + 128) >> 8);
+    dest[2] = (unsigned char)((c * 128 + d * 128 + 128) >> 8);
+    dest[3] = (unsigned char)((d * 64 + e * 192 + 128) >> 8);
+
+    source += 5;
+    dest += 4;
+  }
+}
+
+void aom_vertical_band_5_4_scale_c(unsigned char *source, int src_pitch,
+                                   unsigned char *dest, int dest_pitch,
+                                   unsigned int dest_width) {
+  const unsigned char *const dest_end = dest + dest_width;
+  while (dest < dest_end) {
+    const unsigned int a = source[0 * src_pitch];
+    const unsigned int b = source[1 * src_pitch];
+    const unsigned int c = source[2 * src_pitch];
+    const unsigned int d = source[3 * src_pitch];
+    const unsigned int e = source[4 * src_pitch];
+
+    dest[0 * dest_pitch] = (unsigned char)a;
+    dest[1 * dest_pitch] = (unsigned char)((b * 192 + c * 64 + 128) >> 8);
+    dest[2 * dest_pitch] = (unsigned char)((c * 128 + d * 128 + 128) >> 8);
+    dest[3 * dest_pitch] = (unsigned char)((d * 64 + e * 192 + 128) >> 8);
+
+    ++source;
+    ++dest;
+  }
+}
+
+/*7***************************************************************************
+ *
+ *  ROUTINE       : aom_horizontal_line_3_5_scale_c
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to source data.
+ *                  unsigned int source_width   : Stride of source.
+ *                  unsigned char *dest         : Pointer to destination data.
+ *                  unsigned int dest_width     : Stride of destination
+ *                                                (NOT USED).
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Copies horizontal line of pixels from source to
+ *                  destination scaling up by 3 to 5.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ *
+ ****************************************************************************/
+void aom_horizontal_line_5_3_scale_c(const unsigned char *source,
+                                     unsigned int source_width,
+                                     unsigned char *dest,
+                                     unsigned int dest_width) {
+  const unsigned char *const source_end = source + source_width;
+  (void)dest_width;
+  while (source < source_end) {
+    const unsigned int a = source[0];
+    const unsigned int b = source[1];
+    const unsigned int c = source[2];
+    const unsigned int d = source[3];
+    const unsigned int e = source[4];
+
+    dest[0] = (unsigned char)a;
+    dest[1] = (unsigned char)((b * 85 + c * 171 + 128) >> 8);
+    dest[2] = (unsigned char)((d * 171 + e * 85 + 128) >> 8);
+
+    source += 5;
+    dest += 3;
+  }
+}
+
+void aom_vertical_band_5_3_scale_c(unsigned char *source, int src_pitch,
+                                   unsigned char *dest, int dest_pitch,
+                                   unsigned int dest_width) {
+  const unsigned char *const dest_end = dest + dest_width;
+  while (dest < dest_end) {
+    const unsigned int a = source[0 * src_pitch];
+    const unsigned int b = source[1 * src_pitch];
+    const unsigned int c = source[2 * src_pitch];
+    const unsigned int d = source[3 * src_pitch];
+    const unsigned int e = source[4 * src_pitch];
+
+    dest[0 * dest_pitch] = (unsigned char)a;
+    dest[1 * dest_pitch] = (unsigned char)((b * 85 + c * 171 + 128) >> 8);
+    dest[2 * dest_pitch] = (unsigned char)((d * 171 + e * 85 + 128) >> 8);
+
+    ++source;
+    ++dest;
+  }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : aom_horizontal_line_1_2_scale_c
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to source data.
+ *                  unsigned int source_width   : Stride of source.
+ *                  unsigned char *dest         : Pointer to destination data.
+ *                  unsigned int dest_width     : Stride of destination
+ *                                                (NOT USED).
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Copies horizontal line of pixels from source to
+ *                  destination scaling up by 1 to 2.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+void aom_horizontal_line_2_1_scale_c(const unsigned char *source,
+                                     unsigned int source_width,
+                                     unsigned char *dest,
+                                     unsigned int dest_width) {
+  const unsigned char *const source_end = source + source_width;
+  (void)dest_width;
+  while (source < source_end) {
+    dest[0] = source[0];
+    source += 2;
+    ++dest;
+  }
+}
+
+void aom_vertical_band_2_1_scale_c(unsigned char *source, int src_pitch,
+                                   unsigned char *dest, int dest_pitch,
+                                   unsigned int dest_width) {
+  (void)dest_pitch;
+  (void)src_pitch;
+  memcpy(dest, source, dest_width);
+}
+
+void aom_vertical_band_2_1_scale_i_c(unsigned char *source, int src_pitch,
+                                     unsigned char *dest, int dest_pitch,
+                                     unsigned int dest_width) {
+  const unsigned char *const dest_end = dest + dest_width;
+  (void)dest_pitch;
+  while (dest < dest_end) {
+    const unsigned int a = source[-src_pitch] * 3;
+    const unsigned int b = source[0] * 10;
+    const unsigned int c = source[src_pitch] * 3;
+    dest[0] = (unsigned char)((8 + a + b + c) >> 4);
+    ++source;
+    ++dest;
+  }
+}
diff --git a/third_party/aom/aom_scale/generic/yv12config.c b/third_party/aom/aom_scale/generic/yv12config.c
new file mode 100644
index 000000000..ee15ae103
--- /dev/null
+++ b/third_party/aom/aom_scale/generic/yv12config.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <assert.h>
+
+#include "aom_scale/yv12config.h"
+#include "aom_mem/aom_mem.h"
+#include "aom_ports/mem.h"
+
+/****************************************************************************
+*  Exports
+****************************************************************************/
+
+/****************************************************************************
+ *
+ ****************************************************************************/
+#define yv12_align_addr(addr, align) \
+  (void *)(((size_t)(addr) + ((align)-1)) & (size_t) - (align))
+
+#if CONFIG_AV1
+// TODO(jkoleszar): Maybe replace this with struct aom_image
+
+int aom_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) {
+  if (ybf) {
+    if (ybf->buffer_alloc_sz > 0) {
+      aom_free(ybf->buffer_alloc);
+    }
+
+#if CONFIG_HIGHBITDEPTH && CONFIG_GLOBAL_MOTION
+    if (ybf->y_buffer_8bit) free(ybf->y_buffer_8bit);
+#endif
+
+    /* buffer_alloc isn't accessed by most functions.  Rather y_buffer,
+      u_buffer and v_buffer point to buffer_alloc and are used.  Clear out
+      all of this so that a freed pointer isn't inadvertently used */
+    memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG));
+  } else {
+    return -1;
+  }
+
+  return 0;
+}
+
+int aom_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
+                             int ss_x, int ss_y,
+#if CONFIG_HIGHBITDEPTH
+                             int use_highbitdepth,
+#endif
+                             int border, int byte_alignment,
+                             aom_codec_frame_buffer_t *fb,
+                             aom_get_frame_buffer_cb_fn_t cb, void *cb_priv) {
+  if (ybf) {
+    const int aom_byte_align = (byte_alignment == 0) ? 1 : byte_alignment;
+    const int aligned_width = (width + 7) & ~7;
+    const int aligned_height = (height + 7) & ~7;
+    const int y_stride = ((aligned_width + 2 * border) + 31) & ~31;
+    const uint64_t yplane_size =
+        (aligned_height + 2 * border) * (uint64_t)y_stride + byte_alignment;
+    const int uv_width = aligned_width >> ss_x;
+    const int uv_height = aligned_height >> ss_y;
+    const int uv_stride = y_stride >> ss_x;
+    const int uv_border_w = border >> ss_x;
+    const int uv_border_h = border >> ss_y;
+    const uint64_t uvplane_size =
+        (uv_height + 2 * uv_border_h) * (uint64_t)uv_stride + byte_alignment;
+
+#if CONFIG_HIGHBITDEPTH
+    const uint64_t frame_size =
+        (1 + use_highbitdepth) * (yplane_size + 2 * uvplane_size);
+#else
+    const uint64_t frame_size = yplane_size + 2 * uvplane_size;
+#endif  // CONFIG_HIGHBITDEPTH
+
+    uint8_t *buf = NULL;
+
+    if (cb != NULL) {
+      const int align_addr_extra_size = 31;
+      const uint64_t external_frame_size = frame_size + align_addr_extra_size;
+
+      assert(fb != NULL);
+
+      if (external_frame_size != (size_t)external_frame_size) return -1;
+
+      // Allocation to hold larger frame, or first allocation.
+      if (cb(cb_priv, (size_t)external_frame_size, fb) < 0) return -1;
+
+      if (fb->data == NULL || fb->size < external_frame_size) return -1;
+
+      ybf->buffer_alloc = (uint8_t *)yv12_align_addr(fb->data, 32);
+
+#if defined(__has_feature)
+#if __has_feature(memory_sanitizer)
+      // This memset is needed for fixing the issue of using uninitialized
+      // value in msan test. It will cause a perf loss, so only do this for
+      // msan test.
+      memset(ybf->buffer_alloc, 0, (int)frame_size);
+#endif
+#endif
+    } else if (frame_size > (size_t)ybf->buffer_alloc_sz) {
+      // Allocation to hold larger frame, or first allocation.
+      aom_free(ybf->buffer_alloc);
+      ybf->buffer_alloc = NULL;
+
+      if (frame_size != (size_t)frame_size) return -1;
+
+      ybf->buffer_alloc = (uint8_t *)aom_memalign(32, (size_t)frame_size);
+      if (!ybf->buffer_alloc) return -1;
+
+      ybf->buffer_alloc_sz = (size_t)frame_size;
+
+      // This memset is needed for fixing valgrind error from C loop filter
+      // due to access uninitialized memory in frame border. It could be
+      // removed if border is totally removed.
+      memset(ybf->buffer_alloc, 0, ybf->buffer_alloc_sz);
+    }
+
+    /* Only support allocating buffers that have a border that's a multiple
+     * of 32. The border restriction is required to get 16-byte alignment of
+     * the start of the chroma rows without introducing an arbitrary gap
+     * between planes, which would break the semantics of things like
+     * aom_img_set_rect(). */
+    if (border & 0x1f) return -3;
+
+    ybf->y_crop_width = width;
+    ybf->y_crop_height = height;
+    ybf->y_width = aligned_width;
+    ybf->y_height = aligned_height;
+    ybf->y_stride = y_stride;
+
+    ybf->uv_crop_width = (width + ss_x) >> ss_x;
+    ybf->uv_crop_height = (height + ss_y) >> ss_y;
+    ybf->uv_width = uv_width;
+    ybf->uv_height = uv_height;
+    ybf->uv_stride = uv_stride;
+
+    ybf->border = border;
+    ybf->frame_size = (size_t)frame_size;
+    ybf->subsampling_x = ss_x;
+    ybf->subsampling_y = ss_y;
+
+    buf = ybf->buffer_alloc;
+#if CONFIG_HIGHBITDEPTH
+    if (use_highbitdepth) {
+      // Store uint16 addresses when using 16bit framebuffers
+      buf = CONVERT_TO_BYTEPTR(ybf->buffer_alloc);
+      ybf->flags = YV12_FLAG_HIGHBITDEPTH;
+    } else {
+      ybf->flags = 0;
+    }
+#endif  // CONFIG_HIGHBITDEPTH
+
+    ybf->y_buffer = (uint8_t *)yv12_align_addr(
+        buf + (border * y_stride) + border, aom_byte_align);
+    ybf->u_buffer = (uint8_t *)yv12_align_addr(
+        buf + yplane_size + (uv_border_h * uv_stride) + uv_border_w,
+        aom_byte_align);
+    ybf->v_buffer =
+        (uint8_t *)yv12_align_addr(buf + yplane_size + uvplane_size +
+                                       (uv_border_h * uv_stride) + uv_border_w,
+                                   aom_byte_align);
+
+#if CONFIG_HIGHBITDEPTH && CONFIG_GLOBAL_MOTION
+    if (ybf->y_buffer_8bit) {
+      free(ybf->y_buffer_8bit);
+      ybf->y_buffer_8bit = NULL;
+    }
+#endif
+
+    ybf->corrupted = 0; /* assume not corrupted by errors */
+    return 0;
+  }
+  return -2;
+}
+
+int aom_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
+                           int ss_x, int ss_y,
+#if CONFIG_HIGHBITDEPTH
+                           int use_highbitdepth,
+#endif
+                           int border, int byte_alignment) {
+  if (ybf) {
+    aom_free_frame_buffer(ybf);
+    return aom_realloc_frame_buffer(ybf, width, height, ss_x, ss_y,
+#if CONFIG_HIGHBITDEPTH
+                                    use_highbitdepth,
+#endif
+                                    border, byte_alignment, NULL, NULL, NULL);
+  }
+  return -2;
+}
+#endif
diff --git a/third_party/aom/aom_scale/generic/yv12extend.c b/third_party/aom/aom_scale/generic/yv12extend.c
new file mode 100644
index 000000000..05e463362
--- /dev/null
+++ b/third_party/aom/aom_scale/generic/yv12extend.c
@@ -0,0 +1,382 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <assert.h>
+#include "./aom_config.h"
+#include "./aom_scale_rtcd.h"
+#include "aom/aom_integer.h"
+#include "aom_mem/aom_mem.h"
+#include "aom_ports/mem.h"
+#include "aom_scale/yv12config.h"
+
+static void extend_plane(uint8_t *const src, int src_stride, int width,
+                         int height, int extend_top, int extend_left,
+                         int extend_bottom, int extend_right) {
+  int i;
+  const int linesize = extend_left + extend_right + width;
+
+  /* copy the left and right most columns out */
+  uint8_t *src_ptr1 = src;
+  uint8_t *src_ptr2 = src + width - 1;
+  uint8_t *dst_ptr1 = src - extend_left;
+  uint8_t *dst_ptr2 = src + width;
+
+  for (i = 0; i < height; ++i) {
+    memset(dst_ptr1, src_ptr1[0], extend_left);
+    memset(dst_ptr2, src_ptr2[0], extend_right);
+    src_ptr1 += src_stride;
+    src_ptr2 += src_stride;
+    dst_ptr1 += src_stride;
+    dst_ptr2 += src_stride;
+  }
+
+  /* Now copy the top and bottom lines into each line of the respective
+   * borders
+   */
+  src_ptr1 = src - extend_left;
+  src_ptr2 = src + src_stride * (height - 1) - extend_left;
+  dst_ptr1 = src + src_stride * -extend_top - extend_left;
+  dst_ptr2 = src + src_stride * height - extend_left;
+
+  for (i = 0; i < extend_top; ++i) {
+    memcpy(dst_ptr1, src_ptr1, linesize);
+    dst_ptr1 += src_stride;
+  }
+
+  for (i = 0; i < extend_bottom; ++i) {
+    memcpy(dst_ptr2, src_ptr2, linesize);
+    dst_ptr2 += src_stride;
+  }
+}
+
+#if CONFIG_HIGHBITDEPTH
+static void extend_plane_high(uint8_t *const src8, int src_stride, int width,
+                              int height, int extend_top, int extend_left,
+                              int extend_bottom, int extend_right) {
+  int i;
+  const int linesize = extend_left + extend_right + width;
+  uint16_t *src = CONVERT_TO_SHORTPTR(src8);
+
+  /* copy the left and right most columns out */
+  uint16_t *src_ptr1 = src;
+  uint16_t *src_ptr2 = src + width - 1;
+  uint16_t *dst_ptr1 = src - extend_left;
+  uint16_t *dst_ptr2 = src + width;
+
+  for (i = 0; i < height; ++i) {
+    aom_memset16(dst_ptr1, src_ptr1[0], extend_left);
+    aom_memset16(dst_ptr2, src_ptr2[0], extend_right);
+    src_ptr1 += src_stride;
+    src_ptr2 += src_stride;
+    dst_ptr1 += src_stride;
+    dst_ptr2 += src_stride;
+  }
+
+  /* Now copy the top and bottom lines into each line of the respective
+   * borders
+   */
+  src_ptr1 = src - extend_left;
+  src_ptr2 = src + src_stride * (height - 1) - extend_left;
+  dst_ptr1 = src + src_stride * -extend_top - extend_left;
+  dst_ptr2 = src + src_stride * height - extend_left;
+
+  for (i = 0; i < extend_top; ++i) {
+    memcpy(dst_ptr1, src_ptr1, linesize * sizeof(uint16_t));
+    dst_ptr1 += src_stride;
+  }
+
+  for (i = 0; i < extend_bottom; ++i) {
+    memcpy(dst_ptr2, src_ptr2, linesize * sizeof(uint16_t));
+    dst_ptr2 += src_stride;
+  }
+}
+#endif
+
+void aom_yv12_extend_frame_borders_c(YV12_BUFFER_CONFIG *ybf) {
+  const int uv_border = ybf->border / 2;
+
+  assert(ybf->border % 2 == 0);
+  assert(ybf->y_height - ybf->y_crop_height < 16);
+  assert(ybf->y_width - ybf->y_crop_width < 16);
+  assert(ybf->y_height - ybf->y_crop_height >= 0);
+  assert(ybf->y_width - ybf->y_crop_width >= 0);
+
+#if CONFIG_HIGHBITDEPTH
+  if (ybf->flags & YV12_FLAG_HIGHBITDEPTH) {
+    extend_plane_high(ybf->y_buffer, ybf->y_stride, ybf->y_crop_width,
+                      ybf->y_crop_height, ybf->border, ybf->border,
+                      ybf->border + ybf->y_height - ybf->y_crop_height,
+                      ybf->border + ybf->y_width - ybf->y_crop_width);
+
+    extend_plane_high(ybf->u_buffer, ybf->uv_stride, ybf->uv_crop_width,
+                      ybf->uv_crop_height, uv_border, uv_border,
+                      uv_border + ybf->uv_height - ybf->uv_crop_height,
+                      uv_border + ybf->uv_width - ybf->uv_crop_width);
+
+    extend_plane_high(ybf->v_buffer, ybf->uv_stride, ybf->uv_crop_width,
+                      ybf->uv_crop_height, uv_border, uv_border,
+                      uv_border + ybf->uv_height - ybf->uv_crop_height,
+                      uv_border + ybf->uv_width - ybf->uv_crop_width);
+    return;
+  }
+#endif
+  extend_plane(ybf->y_buffer, ybf->y_stride, ybf->y_crop_width,
+               ybf->y_crop_height, ybf->border, ybf->border,
+               ybf->border + ybf->y_height - ybf->y_crop_height,
+               ybf->border + ybf->y_width - ybf->y_crop_width);
+
+  extend_plane(ybf->u_buffer, ybf->uv_stride, ybf->uv_crop_width,
+               ybf->uv_crop_height, uv_border, uv_border,
+               uv_border + ybf->uv_height - ybf->uv_crop_height,
+               uv_border + ybf->uv_width - ybf->uv_crop_width);
+
+  extend_plane(ybf->v_buffer, ybf->uv_stride, ybf->uv_crop_width,
+               ybf->uv_crop_height, uv_border, uv_border,
+               uv_border + ybf->uv_height - ybf->uv_crop_height,
+               uv_border + ybf->uv_width - ybf->uv_crop_width);
+}
+
+#if CONFIG_AV1
+static void extend_frame(YV12_BUFFER_CONFIG *const ybf, int ext_size) {
+  const int c_w = ybf->uv_crop_width;
+  const int c_h = ybf->uv_crop_height;
+  const int ss_x = ybf->uv_width < ybf->y_width;
+  const int ss_y = ybf->uv_height < ybf->y_height;
+  const int c_et = ext_size >> ss_y;
+  const int c_el = ext_size >> ss_x;
+  const int c_eb = c_et + ybf->uv_height - ybf->uv_crop_height;
+  const int c_er = c_el + ybf->uv_width - ybf->uv_crop_width;
+
+  assert(ybf->y_height - ybf->y_crop_height < 16);
+  assert(ybf->y_width - ybf->y_crop_width < 16);
+  assert(ybf->y_height - ybf->y_crop_height >= 0);
+  assert(ybf->y_width - ybf->y_crop_width >= 0);
+
+#if CONFIG_HIGHBITDEPTH
+  if (ybf->flags & YV12_FLAG_HIGHBITDEPTH) {
+    extend_plane_high(ybf->y_buffer, ybf->y_stride, ybf->y_crop_width,
+                      ybf->y_crop_height, ext_size, ext_size,
+                      ext_size + ybf->y_height - ybf->y_crop_height,
+                      ext_size + ybf->y_width - ybf->y_crop_width);
+    extend_plane_high(ybf->u_buffer, ybf->uv_stride, c_w, c_h, c_et, c_el, c_eb,
+                      c_er);
+    extend_plane_high(ybf->v_buffer, ybf->uv_stride, c_w, c_h, c_et, c_el, c_eb,
+                      c_er);
+    return;
+  }
+#endif
+  extend_plane(ybf->y_buffer, ybf->y_stride, ybf->y_crop_width,
+               ybf->y_crop_height, ext_size, ext_size,
+               ext_size + ybf->y_height - ybf->y_crop_height,
+               ext_size + ybf->y_width - ybf->y_crop_width);
+
+  extend_plane(ybf->u_buffer, ybf->uv_stride, c_w, c_h, c_et, c_el, c_eb, c_er);
+
+  extend_plane(ybf->v_buffer, ybf->uv_stride, c_w, c_h, c_et, c_el, c_eb, c_er);
+}
+
+void aom_extend_frame_borders_c(YV12_BUFFER_CONFIG *ybf) {
+  extend_frame(ybf, ybf->border);
+}
+
+void aom_extend_frame_inner_borders_c(YV12_BUFFER_CONFIG *ybf) {
+  const int inner_bw = (ybf->border > AOMINNERBORDERINPIXELS)
+                           ? AOMINNERBORDERINPIXELS
+                           : ybf->border;
+  extend_frame(ybf, inner_bw);
+}
+
+void aom_extend_frame_borders_y_c(YV12_BUFFER_CONFIG *ybf) {
+  int ext_size = ybf->border;
+  assert(ybf->y_height - ybf->y_crop_height < 16);
+  assert(ybf->y_width - ybf->y_crop_width < 16);
+  assert(ybf->y_height - ybf->y_crop_height >= 0);
+  assert(ybf->y_width - ybf->y_crop_width >= 0);
+
+#if CONFIG_HIGHBITDEPTH
+  if (ybf->flags & YV12_FLAG_HIGHBITDEPTH) {
+    extend_plane_high(ybf->y_buffer, ybf->y_stride, ybf->y_crop_width,
+                      ybf->y_crop_height, ext_size, ext_size,
+                      ext_size + ybf->y_height - ybf->y_crop_height,
+                      ext_size + ybf->y_width - ybf->y_crop_width);
+    return;
+  }
+#endif
+  extend_plane(ybf->y_buffer, ybf->y_stride, ybf->y_crop_width,
+               ybf->y_crop_height, ext_size, ext_size,
+               ext_size + ybf->y_height - ybf->y_crop_height,
+               ext_size + ybf->y_width - ybf->y_crop_width);
+}
+#endif  // CONFIG_AV1
+
+#if CONFIG_HIGHBITDEPTH
+static void memcpy_short_addr(uint8_t *dst8, const uint8_t *src8, int num) {
+  uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
+  uint16_t *src = CONVERT_TO_SHORTPTR(src8);
+  memcpy(dst, src, num * sizeof(uint16_t));
+}
+#endif  // CONFIG_HIGHBITDEPTH
+
+// Copies the source image into the destination image and updates the
+// destination's UMV borders.
+// Note: The frames are assumed to be identical in size.
+void aom_yv12_copy_frame_c(const YV12_BUFFER_CONFIG *src_bc,
+                           YV12_BUFFER_CONFIG *dst_bc) {
+  int row;
+  const uint8_t *src = src_bc->y_buffer;
+  uint8_t *dst = dst_bc->y_buffer;
+
+#if 0
+  /* These assertions are valid in the codec, but the libaom-tester uses
+   * this code slightly differently.
+   */
+  assert(src_bc->y_width == dst_bc->y_width);
+  assert(src_bc->y_height == dst_bc->y_height);
+#endif
+
+#if CONFIG_HIGHBITDEPTH
+  if (src_bc->flags & YV12_FLAG_HIGHBITDEPTH) {
+    assert(dst_bc->flags & YV12_FLAG_HIGHBITDEPTH);
+    for (row = 0; row < src_bc->y_height; ++row) {
+      memcpy_short_addr(dst, src, src_bc->y_width);
+      src += src_bc->y_stride;
+      dst += dst_bc->y_stride;
+    }
+
+    src = src_bc->u_buffer;
+    dst = dst_bc->u_buffer;
+
+    for (row = 0; row < src_bc->uv_height; ++row) {
+      memcpy_short_addr(dst, src, src_bc->uv_width);
+      src += src_bc->uv_stride;
+      dst += dst_bc->uv_stride;
+    }
+
+    src = src_bc->v_buffer;
+    dst = dst_bc->v_buffer;
+
+    for (row = 0; row < src_bc->uv_height; ++row) {
+      memcpy_short_addr(dst, src, src_bc->uv_width);
+      src += src_bc->uv_stride;
+      dst += dst_bc->uv_stride;
+    }
+
+    aom_yv12_extend_frame_borders_c(dst_bc);
+    return;
+  } else {
+    assert(!(dst_bc->flags & YV12_FLAG_HIGHBITDEPTH));
+  }
+#endif
+
+  for (row = 0; row < src_bc->y_height; ++row) {
+    memcpy(dst, src, src_bc->y_width);
+    src += src_bc->y_stride;
+    dst += dst_bc->y_stride;
+  }
+
+  src = src_bc->u_buffer;
+  dst = dst_bc->u_buffer;
+
+  for (row = 0; row < src_bc->uv_height; ++row) {
+    memcpy(dst, src, src_bc->uv_width);
+    src += src_bc->uv_stride;
+    dst += dst_bc->uv_stride;
+  }
+
+  src = src_bc->v_buffer;
+  dst = dst_bc->v_buffer;
+
+  for (row = 0; row < src_bc->uv_height; ++row) {
+    memcpy(dst, src, src_bc->uv_width);
+    src += src_bc->uv_stride;
+    dst += dst_bc->uv_stride;
+  }
+
+  aom_yv12_extend_frame_borders_c(dst_bc);
+}
+
+void aom_yv12_copy_y_c(const YV12_BUFFER_CONFIG *src_ybc,
+                       YV12_BUFFER_CONFIG *dst_ybc) {
+  int row;
+  const uint8_t *src = src_ybc->y_buffer;
+  uint8_t *dst = dst_ybc->y_buffer;
+
+#if CONFIG_HIGHBITDEPTH
+  if (src_ybc->flags & YV12_FLAG_HIGHBITDEPTH) {
+    const uint16_t *src16 = CONVERT_TO_SHORTPTR(src);
+    uint16_t *dst16 = CONVERT_TO_SHORTPTR(dst);
+    for (row = 0; row < src_ybc->y_height; ++row) {
+      memcpy(dst16, src16, src_ybc->y_width * sizeof(uint16_t));
+      src16 += src_ybc->y_stride;
+      dst16 += dst_ybc->y_stride;
+    }
+    return;
+  }
+#endif  // CONFIG_HIGHBITDEPTH
+
+  for (row = 0; row < src_ybc->y_height; ++row) {
+    memcpy(dst, src, src_ybc->y_width);
+    src += src_ybc->y_stride;
+    dst += dst_ybc->y_stride;
+  }
+}
+
+void aom_yv12_copy_u_c(const YV12_BUFFER_CONFIG *src_bc,
+                       YV12_BUFFER_CONFIG *dst_bc) {
+  int row;
+  const uint8_t *src = src_bc->u_buffer;
+  uint8_t *dst = dst_bc->u_buffer;
+
+#if CONFIG_HIGHBITDEPTH
+  if (src_bc->flags & YV12_FLAG_HIGHBITDEPTH) {
+    const uint16_t *src16 = CONVERT_TO_SHORTPTR(src);
+    uint16_t *dst16 = CONVERT_TO_SHORTPTR(dst);
+    for (row = 0; row < src_bc->uv_height; ++row) {
+      memcpy(dst16, src16, src_bc->uv_width * sizeof(uint16_t));
+      src16 += src_bc->uv_stride;
+      dst16 += dst_bc->uv_stride;
+    }
+    return;
+  }
+#endif  // CONFIG_HIGHBITDEPTH
+
+  for (row = 0; row < src_bc->uv_height; ++row) {
+    memcpy(dst, src, src_bc->uv_width);
+    src += src_bc->uv_stride;
+    dst += dst_bc->uv_stride;
+  }
+}
+
+void aom_yv12_copy_v_c(const YV12_BUFFER_CONFIG *src_bc,
+                       YV12_BUFFER_CONFIG *dst_bc) {
+  int row;
+  const uint8_t *src = src_bc->v_buffer;
+  uint8_t *dst = dst_bc->v_buffer;
+
+#if CONFIG_HIGHBITDEPTH
+  if (src_bc->flags & YV12_FLAG_HIGHBITDEPTH) {
+    const uint16_t *src16 = CONVERT_TO_SHORTPTR(src);
+    uint16_t *dst16 = CONVERT_TO_SHORTPTR(dst);
+    for (row = 0; row < src_bc->uv_height; ++row) {
+      memcpy(dst16, src16, src_bc->uv_width * sizeof(uint16_t));
+      src16 += src_bc->uv_stride;
+      dst16 += dst_bc->uv_stride;
+    }
+    return;
+  }
+#endif  // CONFIG_HIGHBITDEPTH
+
+  for (row = 0; row < src_bc->uv_height; ++row) {
+    memcpy(dst, src, src_bc->uv_width);
+    src += src_bc->uv_stride;
+    dst += dst_bc->uv_stride;
+  }
+}
diff --git a/third_party/aom/aom_scale/mips/dspr2/yv12extend_dspr2.c b/third_party/aom/aom_scale/mips/dspr2/yv12extend_dspr2.c
new file mode 100644
index 000000000..51192f7b9
--- /dev/null
+++ b/third_party/aom/aom_scale/mips/dspr2/yv12extend_dspr2.c
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <assert.h>
+
+#include "./aom_config.h"
+#include "aom_scale/yv12config.h"
+#include "aom_mem/aom_mem.h"
+#include "aom_scale/aom_scale.h"
+
+#if HAVE_DSPR2
+static void extend_plane(uint8_t *const src, int src_stride, int width,
+                         int height, int extend_top, int extend_left,
+                         int extend_bottom, int extend_right) {
+  int i, j;
+  uint8_t *left_src, *right_src;
+  uint8_t *left_dst_start, *right_dst_start;
+  uint8_t *left_dst, *right_dst;
+  uint8_t *top_src, *bot_src;
+  uint8_t *top_dst, *bot_dst;
+  uint32_t left_pix;
+  uint32_t right_pix;
+  uint32_t linesize;
+
+  /* copy the left and right most columns out */
+  left_src = src;
+  right_src = src + width - 1;
+  left_dst_start = src - extend_left;
+  right_dst_start = src + width;
+
+  for (i = height; i--;) {
+    left_dst = left_dst_start;
+    right_dst = right_dst_start;
+
+    __asm__ __volatile__(
+        "lb        %[left_pix],     0(%[left_src])      \n\t"
+        "lb        %[right_pix],    0(%[right_src])     \n\t"
+        "replv.qb  %[left_pix],     %[left_pix]         \n\t"
+        "replv.qb  %[right_pix],    %[right_pix]        \n\t"
+
+        : [left_pix] "=&r"(left_pix), [right_pix] "=&r"(right_pix)
+        : [left_src] "r"(left_src), [right_src] "r"(right_src));
+
+    for (j = extend_left / 4; j--;) {
+      __asm__ __volatile__(
+          "sw     %[left_pix],    0(%[left_dst])     \n\t"
+          "sw     %[right_pix],   0(%[right_dst])    \n\t"
+
+          :
+          : [left_dst] "r"(left_dst), [left_pix] "r"(left_pix),
+            [right_dst] "r"(right_dst), [right_pix] "r"(right_pix));
+
+      left_dst += 4;
+      right_dst += 4;
+    }
+
+    for (j = extend_left % 4; j--;) {
+      __asm__ __volatile__(
+          "sb     %[left_pix],    0(%[left_dst])     \n\t"
+          "sb     %[right_pix],   0(%[right_dst])     \n\t"
+
+          :
+          : [left_dst] "r"(left_dst), [left_pix] "r"(left_pix),
+            [right_dst] "r"(right_dst), [right_pix] "r"(right_pix));
+
+      left_dst += 1;
+      right_dst += 1;
+    }
+
+    left_src += src_stride;
+    right_src += src_stride;
+    left_dst_start += src_stride;
+    right_dst_start += src_stride;
+  }
+
+  /* Now copy the top and bottom lines into each line of the respective
+   * borders
+   */
+  top_src = src - extend_left;
+  bot_src = src + src_stride * (height - 1) - extend_left;
+  top_dst = src + src_stride * (-extend_top) - extend_left;
+  bot_dst = src + src_stride * (height)-extend_left;
+  linesize = extend_left + extend_right + width;
+
+  for (i = 0; i < extend_top; i++) {
+    memcpy(top_dst, top_src, linesize);
+    top_dst += src_stride;
+  }
+
+  for (i = 0; i < extend_bottom; i++) {
+    memcpy(bot_dst, bot_src, linesize);
+    bot_dst += src_stride;
+  }
+}
+
+static void extend_frame(YV12_BUFFER_CONFIG *const ybf, int ext_size) {
+  const int c_w = ybf->uv_crop_width;
+  const int c_h = ybf->uv_crop_height;
+  const int ss_x = ybf->uv_width < ybf->y_width;
+  const int ss_y = ybf->uv_height < ybf->y_height;
+  const int c_et = ext_size >> ss_y;
+  const int c_el = ext_size >> ss_x;
+  const int c_eb = c_et + ybf->uv_height - ybf->uv_crop_height;
+  const int c_er = c_el + ybf->uv_width - ybf->uv_crop_width;
+
+  assert(ybf->y_height - ybf->y_crop_height < 16);
+  assert(ybf->y_width - ybf->y_crop_width < 16);
+  assert(ybf->y_height - ybf->y_crop_height >= 0);
+  assert(ybf->y_width - ybf->y_crop_width >= 0);
+
+  extend_plane(ybf->y_buffer, ybf->y_stride, ybf->y_crop_width,
+               ybf->y_crop_height, ext_size, ext_size,
+               ext_size + ybf->y_height - ybf->y_crop_height,
+               ext_size + ybf->y_width - ybf->y_crop_width);
+
+  extend_plane(ybf->u_buffer, ybf->uv_stride, c_w, c_h, c_et, c_el, c_eb, c_er);
+
+  extend_plane(ybf->v_buffer, ybf->uv_stride, c_w, c_h, c_et, c_el, c_eb, c_er);
+}
+
+void aom_extend_frame_borders_dspr2(YV12_BUFFER_CONFIG *ybf) {
+  extend_frame(ybf, ybf->border);
+}
+
+void aom_extend_frame_inner_borders_dspr2(YV12_BUFFER_CONFIG *ybf) {
+  const int inner_bw = (ybf->border > AOMINNERBORDERINPIXELS)
+                           ? AOMINNERBORDERINPIXELS
+                           : ybf->border;
+  extend_frame(ybf, inner_bw);
+}
+#endif
diff --git a/third_party/aom/aom_scale/yv12config.h b/third_party/aom/aom_scale/yv12config.h
new file mode 100644
index 000000000..434dc7b4a
--- /dev/null
+++ b/third_party/aom/aom_scale/yv12config.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_SCALE_YV12CONFIG_H_
+#define AOM_SCALE_YV12CONFIG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "./aom_config.h"
+#include "aom/aom_codec.h"
+#include "aom/aom_frame_buffer.h"
+#include "aom/aom_integer.h"
+
+#if CONFIG_EXT_PARTITION
+#define AOMINNERBORDERINPIXELS 160
+#else
+#define AOMINNERBORDERINPIXELS 96
+#endif  // CONFIG_EXT_PARTITION
+#define AOM_INTERP_EXTEND 4
+
+// TODO(jingning): Use unified inter predictor for encoder and
+// decoder during the development process. Revisit the frame border
+// to improve the decoder performance.
+#define AOM_BORDER_IN_PIXELS 160
+
+typedef struct yv12_buffer_config {
+  int y_width;
+  int y_height;
+  int y_crop_width;
+  int y_crop_height;
+  int y_stride;
+
+  int uv_width;
+  int uv_height;
+  int uv_crop_width;
+  int uv_crop_height;
+  int uv_stride;
+
+  int alpha_width;
+  int alpha_height;
+  int alpha_stride;
+
+  uint8_t *y_buffer;
+  uint8_t *u_buffer;
+  uint8_t *v_buffer;
+  uint8_t *alpha_buffer;
+
+#if CONFIG_HIGHBITDEPTH && CONFIG_GLOBAL_MOTION
+  // If the frame is stored in a 16-bit buffer, this stores an 8-bit version
+  // for use in global motion detection. It is allocated on-demand.
+  uint8_t *y_buffer_8bit;
+#endif
+
+  uint8_t *buffer_alloc;
+  size_t buffer_alloc_sz;
+  int border;
+  size_t frame_size;
+  int subsampling_x;
+  int subsampling_y;
+  unsigned int bit_depth;
+  aom_color_space_t color_space;
+  aom_color_range_t color_range;
+  int render_width;
+  int render_height;
+
+  int corrupted;
+  int flags;
+} YV12_BUFFER_CONFIG;
+
+#define YV12_FLAG_HIGHBITDEPTH 8
+
+int aom_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
+                           int ss_x, int ss_y,
+#if CONFIG_HIGHBITDEPTH
+                           int use_highbitdepth,
+#endif
+                           int border, int byte_alignment);
+
+// Updates the yv12 buffer config with the frame buffer. |byte_alignment| must
+// be a power of 2, from 32 to 1024. 0 sets legacy alignment. If cb is not
+// NULL, then libaom is using the frame buffer callbacks to handle memory.
+// If cb is not NULL, libaom will call cb with minimum size in bytes needed
+// to decode the current frame. If cb is NULL, libaom will allocate memory
+// internally to decode the current frame. Returns 0 on success. Returns < 0
+// on failure.
+int aom_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
+                             int ss_x, int ss_y,
+#if CONFIG_HIGHBITDEPTH
+                             int use_highbitdepth,
+#endif
+                             int border, int byte_alignment,
+                             aom_codec_frame_buffer_t *fb,
+                             aom_get_frame_buffer_cb_fn_t cb, void *cb_priv);
+int aom_free_frame_buffer(YV12_BUFFER_CONFIG *ybf);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // AOM_SCALE_YV12CONFIG_H_