Merge pull request #850 from trav90/add-av1-support

Add initial support for AV1 video.

1 files changed, 1162 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/reconinter.c b/third_party/aom/av1/common/reconinter.c
new file mode 100644
index 000000000..3203efce4
--- /dev/null
+++ b/third_party/aom/av1/common/reconinter.c
@@ -0,0 +1,1162 @@
+/*
+ * 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 <stdio.h>
+#include <limits.h>
+
+#include "config/aom_config.h"
+#include "config/aom_dsp_rtcd.h"
+#include "config/aom_scale_rtcd.h"
+
+#include "aom/aom_integer.h"
+#include "aom_dsp/blend.h"
+
+#include "av1/common/blockd.h"
+#include "av1/common/mvref_common.h"
+#include "av1/common/reconinter.h"
+#include "av1/common/reconintra.h"
+#include "av1/common/onyxc_int.h"
+#include "av1/common/obmc.h"
+
+#define USE_PRECOMPUTED_WEDGE_MASK 1
+#define USE_PRECOMPUTED_WEDGE_SIGN 1
+
+// This function will determine whether or not to create a warped
+// prediction.
+int av1_allow_warp(const MB_MODE_INFO *const mbmi,
+                   const WarpTypesAllowed *const warp_types,
+                   const WarpedMotionParams *const gm_params,
+                   int build_for_obmc, int x_scale, int y_scale,
+                   WarpedMotionParams *final_warp_params) {
+  if (x_scale != SCALE_SUBPEL_SHIFTS || y_scale != SCALE_SUBPEL_SHIFTS)
+    return 0;
+
+  if (final_warp_params != NULL) *final_warp_params = default_warp_params;
+
+  if (build_for_obmc) return 0;
+
+  if (warp_types->local_warp_allowed && !mbmi->wm_params.invalid) {
+    if (final_warp_params != NULL)
+      memcpy(final_warp_params, &mbmi->wm_params, sizeof(*final_warp_params));
+    return 1;
+  } else if (warp_types->global_warp_allowed && !gm_params->invalid) {
+    if (final_warp_params != NULL)
+      memcpy(final_warp_params, gm_params, sizeof(*final_warp_params));
+    return 1;
+  }
+
+  return 0;
+}
+
+void av1_make_inter_predictor(const uint8_t *src, int src_stride, uint8_t *dst,
+                              int dst_stride, const SubpelParams *subpel_params,
+                              const struct scale_factors *sf, int w, int h,
+                              ConvolveParams *conv_params,
+                              InterpFilters interp_filters,
+                              const WarpTypesAllowed *warp_types, int p_col,
+                              int p_row, int plane, int ref,
+                              const MB_MODE_INFO *mi, int build_for_obmc,
+                              const MACROBLOCKD *xd, int can_use_previous) {
+  // Make sure the selected motion mode is valid for this configuration
+  assert_motion_mode_valid(mi->motion_mode, xd->global_motion, xd, mi,
+                           can_use_previous);
+  assert(IMPLIES(conv_params->is_compound, conv_params->dst != NULL));
+
+  WarpedMotionParams final_warp_params;
+  const int do_warp =
+      (w >= 8 && h >= 8 &&
+       av1_allow_warp(mi, warp_types, &xd->global_motion[mi->ref_frame[ref]],
+                      build_for_obmc, subpel_params->xs, subpel_params->ys,
+                      &final_warp_params));
+  const int is_intrabc = mi->use_intrabc;
+  assert(IMPLIES(is_intrabc, !do_warp));
+
+  if (do_warp && xd->cur_frame_force_integer_mv == 0) {
+    const struct macroblockd_plane *const pd = &xd->plane[plane];
+    const struct buf_2d *const pre_buf = &pd->pre[ref];
+    av1_warp_plane(&final_warp_params,
+                   xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH, xd->bd,
+                   pre_buf->buf0, pre_buf->width, pre_buf->height,
+                   pre_buf->stride, dst, p_col, p_row, w, h, dst_stride,
+                   pd->subsampling_x, pd->subsampling_y, conv_params);
+  } else if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
+    highbd_inter_predictor(src, src_stride, dst, dst_stride, subpel_params, sf,
+                           w, h, conv_params, interp_filters, is_intrabc,
+                           xd->bd);
+  } else {
+    inter_predictor(src, src_stride, dst, dst_stride, subpel_params, sf, w, h,
+                    conv_params, interp_filters, is_intrabc);
+  }
+}
+
+#if USE_PRECOMPUTED_WEDGE_MASK
+static const uint8_t wedge_master_oblique_odd[MASK_MASTER_SIZE] = {
+  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  2,  6,  18,
+  37, 53, 60, 63, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+  64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+};
+static const uint8_t wedge_master_oblique_even[MASK_MASTER_SIZE] = {
+  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  4,  11, 27,
+  46, 58, 62, 63, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+  64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+};
+static const uint8_t wedge_master_vertical[MASK_MASTER_SIZE] = {
+  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  2,  7,  21,
+  43, 57, 62, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+  64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+};
+
+static void shift_copy(const uint8_t *src, uint8_t *dst, int shift, int width) {
+  if (shift >= 0) {
+    memcpy(dst + shift, src, width - shift);
+    memset(dst, src[0], shift);
+  } else {
+    shift = -shift;
+    memcpy(dst, src + shift, width - shift);
+    memset(dst + width - shift, src[width - 1], shift);
+  }
+}
+#endif  // USE_PRECOMPUTED_WEDGE_MASK
+
+#if USE_PRECOMPUTED_WEDGE_SIGN
+/* clang-format off */
+DECLARE_ALIGNED(16, static uint8_t,
+                wedge_signflip_lookup[BLOCK_SIZES_ALL][MAX_WEDGE_TYPES]) = {
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, },
+  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, },
+  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, },
+  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, },
+  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, },
+  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, },
+  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, },
+  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },  // not used
+};
+/* clang-format on */
+#else
+DECLARE_ALIGNED(16, static uint8_t,
+                wedge_signflip_lookup[BLOCK_SIZES_ALL][MAX_WEDGE_TYPES]);
+#endif  // USE_PRECOMPUTED_WEDGE_SIGN
+
+// [negative][direction]
+DECLARE_ALIGNED(
+    16, static uint8_t,
+    wedge_mask_obl[2][WEDGE_DIRECTIONS][MASK_MASTER_SIZE * MASK_MASTER_SIZE]);
+
+// 4 * MAX_WEDGE_SQUARE is an easy to compute and fairly tight upper bound
+// on the sum of all mask sizes up to an including MAX_WEDGE_SQUARE.
+DECLARE_ALIGNED(16, static uint8_t,
+                wedge_mask_buf[2 * MAX_WEDGE_TYPES * 4 * MAX_WEDGE_SQUARE]);
+
+static wedge_masks_type wedge_masks[BLOCK_SIZES_ALL][2];
+
+static const wedge_code_type wedge_codebook_16_hgtw[16] = {
+  { WEDGE_OBLIQUE27, 4, 4 },  { WEDGE_OBLIQUE63, 4, 4 },
+  { WEDGE_OBLIQUE117, 4, 4 }, { WEDGE_OBLIQUE153, 4, 4 },
+  { WEDGE_HORIZONTAL, 4, 2 }, { WEDGE_HORIZONTAL, 4, 4 },
+  { WEDGE_HORIZONTAL, 4, 6 }, { WEDGE_VERTICAL, 4, 4 },
+  { WEDGE_OBLIQUE27, 4, 2 },  { WEDGE_OBLIQUE27, 4, 6 },
+  { WEDGE_OBLIQUE153, 4, 2 }, { WEDGE_OBLIQUE153, 4, 6 },
+  { WEDGE_OBLIQUE63, 2, 4 },  { WEDGE_OBLIQUE63, 6, 4 },
+  { WEDGE_OBLIQUE117, 2, 4 }, { WEDGE_OBLIQUE117, 6, 4 },
+};
+
+static const wedge_code_type wedge_codebook_16_hltw[16] = {
+  { WEDGE_OBLIQUE27, 4, 4 },  { WEDGE_OBLIQUE63, 4, 4 },
+  { WEDGE_OBLIQUE117, 4, 4 }, { WEDGE_OBLIQUE153, 4, 4 },
+  { WEDGE_VERTICAL, 2, 4 },   { WEDGE_VERTICAL, 4, 4 },
+  { WEDGE_VERTICAL, 6, 4 },   { WEDGE_HORIZONTAL, 4, 4 },
+  { WEDGE_OBLIQUE27, 4, 2 },  { WEDGE_OBLIQUE27, 4, 6 },
+  { WEDGE_OBLIQUE153, 4, 2 }, { WEDGE_OBLIQUE153, 4, 6 },
+  { WEDGE_OBLIQUE63, 2, 4 },  { WEDGE_OBLIQUE63, 6, 4 },
+  { WEDGE_OBLIQUE117, 2, 4 }, { WEDGE_OBLIQUE117, 6, 4 },
+};
+
+static const wedge_code_type wedge_codebook_16_heqw[16] = {
+  { WEDGE_OBLIQUE27, 4, 4 },  { WEDGE_OBLIQUE63, 4, 4 },
+  { WEDGE_OBLIQUE117, 4, 4 }, { WEDGE_OBLIQUE153, 4, 4 },
+  { WEDGE_HORIZONTAL, 4, 2 }, { WEDGE_HORIZONTAL, 4, 6 },
+  { WEDGE_VERTICAL, 2, 4 },   { WEDGE_VERTICAL, 6, 4 },
+  { WEDGE_OBLIQUE27, 4, 2 },  { WEDGE_OBLIQUE27, 4, 6 },
+  { WEDGE_OBLIQUE153, 4, 2 }, { WEDGE_OBLIQUE153, 4, 6 },
+  { WEDGE_OBLIQUE63, 2, 4 },  { WEDGE_OBLIQUE63, 6, 4 },
+  { WEDGE_OBLIQUE117, 2, 4 }, { WEDGE_OBLIQUE117, 6, 4 },
+};
+
+const wedge_params_type wedge_params_lookup[BLOCK_SIZES_ALL] = {
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 4, wedge_codebook_16_heqw, wedge_signflip_lookup[BLOCK_8X8],
+    wedge_masks[BLOCK_8X8] },
+  { 4, wedge_codebook_16_hgtw, wedge_signflip_lookup[BLOCK_8X16],
+    wedge_masks[BLOCK_8X16] },
+  { 4, wedge_codebook_16_hltw, wedge_signflip_lookup[BLOCK_16X8],
+    wedge_masks[BLOCK_16X8] },
+  { 4, wedge_codebook_16_heqw, wedge_signflip_lookup[BLOCK_16X16],
+    wedge_masks[BLOCK_16X16] },
+  { 4, wedge_codebook_16_hgtw, wedge_signflip_lookup[BLOCK_16X32],
+    wedge_masks[BLOCK_16X32] },
+  { 4, wedge_codebook_16_hltw, wedge_signflip_lookup[BLOCK_32X16],
+    wedge_masks[BLOCK_32X16] },
+  { 4, wedge_codebook_16_heqw, wedge_signflip_lookup[BLOCK_32X32],
+    wedge_masks[BLOCK_32X32] },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+  { 4, wedge_codebook_16_hgtw, wedge_signflip_lookup[BLOCK_8X32],
+    wedge_masks[BLOCK_8X32] },
+  { 4, wedge_codebook_16_hltw, wedge_signflip_lookup[BLOCK_32X8],
+    wedge_masks[BLOCK_32X8] },
+  { 0, NULL, NULL, NULL },
+  { 0, NULL, NULL, NULL },
+};
+
+static const uint8_t *get_wedge_mask_inplace(int wedge_index, int neg,
+                                             BLOCK_SIZE sb_type) {
+  const uint8_t *master;
+  const int bh = block_size_high[sb_type];
+  const int bw = block_size_wide[sb_type];
+  const wedge_code_type *a =
+      wedge_params_lookup[sb_type].codebook + wedge_index;
+  int woff, hoff;
+  const uint8_t wsignflip = wedge_params_lookup[sb_type].signflip[wedge_index];
+
+  assert(wedge_index >= 0 &&
+         wedge_index < (1 << get_wedge_bits_lookup(sb_type)));
+  woff = (a->x_offset * bw) >> 3;
+  hoff = (a->y_offset * bh) >> 3;
+  master = wedge_mask_obl[neg ^ wsignflip][a->direction] +
+           MASK_MASTER_STRIDE * (MASK_MASTER_SIZE / 2 - hoff) +
+           MASK_MASTER_SIZE / 2 - woff;
+  return master;
+}
+
+const uint8_t *av1_get_compound_type_mask(
+    const INTERINTER_COMPOUND_DATA *const comp_data, BLOCK_SIZE sb_type) {
+  assert(is_masked_compound_type(comp_data->type));
+  (void)sb_type;
+  switch (comp_data->type) {
+    case COMPOUND_WEDGE:
+      return av1_get_contiguous_soft_mask(comp_data->wedge_index,
+                                          comp_data->wedge_sign, sb_type);
+    case COMPOUND_DIFFWTD: return comp_data->seg_mask;
+    default: assert(0); return NULL;
+  }
+}
+
+static void diffwtd_mask_d16(uint8_t *mask, int which_inverse, int mask_base,
+                             const CONV_BUF_TYPE *src0, int src0_stride,
+                             const CONV_BUF_TYPE *src1, int src1_stride, int h,
+                             int w, ConvolveParams *conv_params, int bd) {
+  int round =
+      2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1 + (bd - 8);
+  int i, j, m, diff;
+  for (i = 0; i < h; ++i) {
+    for (j = 0; j < w; ++j) {
+      diff = abs(src0[i * src0_stride + j] - src1[i * src1_stride + j]);
+      diff = ROUND_POWER_OF_TWO(diff, round);
+      m = clamp(mask_base + (diff / DIFF_FACTOR), 0, AOM_BLEND_A64_MAX_ALPHA);
+      mask[i * w + j] = which_inverse ? AOM_BLEND_A64_MAX_ALPHA - m : m;
+    }
+  }
+}
+
+void av1_build_compound_diffwtd_mask_d16_c(
+    uint8_t *mask, DIFFWTD_MASK_TYPE mask_type, const CONV_BUF_TYPE *src0,
+    int src0_stride, const CONV_BUF_TYPE *src1, int src1_stride, int h, int w,
+    ConvolveParams *conv_params, int bd) {
+  switch (mask_type) {
+    case DIFFWTD_38:
+      diffwtd_mask_d16(mask, 0, 38, src0, src0_stride, src1, src1_stride, h, w,
+                       conv_params, bd);
+      break;
+    case DIFFWTD_38_INV:
+      diffwtd_mask_d16(mask, 1, 38, src0, src0_stride, src1, src1_stride, h, w,
+                       conv_params, bd);
+      break;
+    default: assert(0);
+  }
+}
+
+static void diffwtd_mask(uint8_t *mask, int which_inverse, int mask_base,
+                         const uint8_t *src0, int src0_stride,
+                         const uint8_t *src1, int src1_stride, int h, int w) {
+  int i, j, m, diff;
+  for (i = 0; i < h; ++i) {
+    for (j = 0; j < w; ++j) {
+      diff =
+          abs((int)src0[i * src0_stride + j] - (int)src1[i * src1_stride + j]);
+      m = clamp(mask_base + (diff / DIFF_FACTOR), 0, AOM_BLEND_A64_MAX_ALPHA);
+      mask[i * w + j] = which_inverse ? AOM_BLEND_A64_MAX_ALPHA - m : m;
+    }
+  }
+}
+
+void av1_build_compound_diffwtd_mask_c(uint8_t *mask,
+                                       DIFFWTD_MASK_TYPE mask_type,
+                                       const uint8_t *src0, int src0_stride,
+                                       const uint8_t *src1, int src1_stride,
+                                       int h, int w) {
+  switch (mask_type) {
+    case DIFFWTD_38:
+      diffwtd_mask(mask, 0, 38, src0, src0_stride, src1, src1_stride, h, w);
+      break;
+    case DIFFWTD_38_INV:
+      diffwtd_mask(mask, 1, 38, src0, src0_stride, src1, src1_stride, h, w);
+      break;
+    default: assert(0);
+  }
+}
+
+static AOM_FORCE_INLINE void diffwtd_mask_highbd(
+    uint8_t *mask, int which_inverse, int mask_base, const uint16_t *src0,
+    int src0_stride, const uint16_t *src1, int src1_stride, int h, int w,
+    const unsigned int bd) {
+  assert(bd >= 8);
+  if (bd == 8) {
+    if (which_inverse) {
+      for (int i = 0; i < h; ++i) {
+        for (int j = 0; j < w; ++j) {
+          int diff = abs((int)src0[j] - (int)src1[j]) / DIFF_FACTOR;
+          unsigned int m = negative_to_zero(mask_base + diff);
+          m = AOMMIN(m, AOM_BLEND_A64_MAX_ALPHA);
+          mask[j] = AOM_BLEND_A64_MAX_ALPHA - m;
+        }
+        src0 += src0_stride;
+        src1 += src1_stride;
+        mask += w;
+      }
+    } else {
+      for (int i = 0; i < h; ++i) {
+        for (int j = 0; j < w; ++j) {
+          int diff = abs((int)src0[j] - (int)src1[j]) / DIFF_FACTOR;
+          unsigned int m = negative_to_zero(mask_base + diff);
+          m = AOMMIN(m, AOM_BLEND_A64_MAX_ALPHA);
+          mask[j] = m;
+        }
+        src0 += src0_stride;
+        src1 += src1_stride;
+        mask += w;
+      }
+    }
+  } else {
+    const unsigned int bd_shift = bd - 8;
+    if (which_inverse) {
+      for (int i = 0; i < h; ++i) {
+        for (int j = 0; j < w; ++j) {
+          int diff =
+              (abs((int)src0[j] - (int)src1[j]) >> bd_shift) / DIFF_FACTOR;
+          unsigned int m = negative_to_zero(mask_base + diff);
+          m = AOMMIN(m, AOM_BLEND_A64_MAX_ALPHA);
+          mask[j] = AOM_BLEND_A64_MAX_ALPHA - m;
+        }
+        src0 += src0_stride;
+        src1 += src1_stride;
+        mask += w;
+      }
+    } else {
+      for (int i = 0; i < h; ++i) {
+        for (int j = 0; j < w; ++j) {
+          int diff =
+              (abs((int)src0[j] - (int)src1[j]) >> bd_shift) / DIFF_FACTOR;
+          unsigned int m = negative_to_zero(mask_base + diff);
+          m = AOMMIN(m, AOM_BLEND_A64_MAX_ALPHA);
+          mask[j] = m;
+        }
+        src0 += src0_stride;
+        src1 += src1_stride;
+        mask += w;
+      }
+    }
+  }
+}
+
+void av1_build_compound_diffwtd_mask_highbd_c(
+    uint8_t *mask, DIFFWTD_MASK_TYPE mask_type, const uint8_t *src0,
+    int src0_stride, const uint8_t *src1, int src1_stride, int h, int w,
+    int bd) {
+  switch (mask_type) {
+    case DIFFWTD_38:
+      diffwtd_mask_highbd(mask, 0, 38, CONVERT_TO_SHORTPTR(src0), src0_stride,
+                          CONVERT_TO_SHORTPTR(src1), src1_stride, h, w, bd);
+      break;
+    case DIFFWTD_38_INV:
+      diffwtd_mask_highbd(mask, 1, 38, CONVERT_TO_SHORTPTR(src0), src0_stride,
+                          CONVERT_TO_SHORTPTR(src1), src1_stride, h, w, bd);
+      break;
+    default: assert(0);
+  }
+}
+
+static void init_wedge_master_masks() {
+  int i, j;
+  const int w = MASK_MASTER_SIZE;
+  const int h = MASK_MASTER_SIZE;
+  const int stride = MASK_MASTER_STRIDE;
+// Note: index [0] stores the masters, and [1] its complement.
+#if USE_PRECOMPUTED_WEDGE_MASK
+  // Generate prototype by shifting the masters
+  int shift = h / 4;
+  for (i = 0; i < h; i += 2) {
+    shift_copy(wedge_master_oblique_even,
+               &wedge_mask_obl[0][WEDGE_OBLIQUE63][i * stride], shift,
+               MASK_MASTER_SIZE);
+    shift--;
+    shift_copy(wedge_master_oblique_odd,
+               &wedge_mask_obl[0][WEDGE_OBLIQUE63][(i + 1) * stride], shift,
+               MASK_MASTER_SIZE);
+    memcpy(&wedge_mask_obl[0][WEDGE_VERTICAL][i * stride],
+           wedge_master_vertical,
+           MASK_MASTER_SIZE * sizeof(wedge_master_vertical[0]));
+    memcpy(&wedge_mask_obl[0][WEDGE_VERTICAL][(i + 1) * stride],
+           wedge_master_vertical,
+           MASK_MASTER_SIZE * sizeof(wedge_master_vertical[0]));
+  }
+#else
+  static const double smoother_param = 2.85;
+  const int a[2] = { 2, 1 };
+  const double asqrt = sqrt(a[0] * a[0] + a[1] * a[1]);
+  for (i = 0; i < h; i++) {
+    for (j = 0; j < w; ++j) {
+      int x = (2 * j + 1 - w);
+      int y = (2 * i + 1 - h);
+      double d = (a[0] * x + a[1] * y) / asqrt;
+      const int msk = (int)rint((1.0 + tanh(d / smoother_param)) * 32);
+      wedge_mask_obl[0][WEDGE_OBLIQUE63][i * stride + j] = msk;
+      const int mskx = (int)rint((1.0 + tanh(x / smoother_param)) * 32);
+      wedge_mask_obl[0][WEDGE_VERTICAL][i * stride + j] = mskx;
+    }
+  }
+#endif  // USE_PRECOMPUTED_WEDGE_MASK
+  for (i = 0; i < h; ++i) {
+    for (j = 0; j < w; ++j) {
+      const int msk = wedge_mask_obl[0][WEDGE_OBLIQUE63][i * stride + j];
+      wedge_mask_obl[0][WEDGE_OBLIQUE27][j * stride + i] = msk;
+      wedge_mask_obl[0][WEDGE_OBLIQUE117][i * stride + w - 1 - j] =
+          wedge_mask_obl[0][WEDGE_OBLIQUE153][(w - 1 - j) * stride + i] =
+              (1 << WEDGE_WEIGHT_BITS) - msk;
+      wedge_mask_obl[1][WEDGE_OBLIQUE63][i * stride + j] =
+          wedge_mask_obl[1][WEDGE_OBLIQUE27][j * stride + i] =
+              (1 << WEDGE_WEIGHT_BITS) - msk;
+      wedge_mask_obl[1][WEDGE_OBLIQUE117][i * stride + w - 1 - j] =
+          wedge_mask_obl[1][WEDGE_OBLIQUE153][(w - 1 - j) * stride + i] = msk;
+      const int mskx = wedge_mask_obl[0][WEDGE_VERTICAL][i * stride + j];
+      wedge_mask_obl[0][WEDGE_HORIZONTAL][j * stride + i] = mskx;
+      wedge_mask_obl[1][WEDGE_VERTICAL][i * stride + j] =
+          wedge_mask_obl[1][WEDGE_HORIZONTAL][j * stride + i] =
+              (1 << WEDGE_WEIGHT_BITS) - mskx;
+    }
+  }
+}
+
+#if !USE_PRECOMPUTED_WEDGE_SIGN
+// If the signs for the wedges for various blocksizes are
+// inconsistent flip the sign flag. Do it only once for every
+// wedge codebook.
+static void init_wedge_signs() {
+  BLOCK_SIZE sb_type;
+  memset(wedge_signflip_lookup, 0, sizeof(wedge_signflip_lookup));
+  for (sb_type = BLOCK_4X4; sb_type < BLOCK_SIZES_ALL; ++sb_type) {
+    const int bw = block_size_wide[sb_type];
+    const int bh = block_size_high[sb_type];
+    const wedge_params_type wedge_params = wedge_params_lookup[sb_type];
+    const int wbits = wedge_params.bits;
+    const int wtypes = 1 << wbits;
+    int i, w;
+    if (wbits) {
+      for (w = 0; w < wtypes; ++w) {
+        // Get the mask master, i.e. index [0]
+        const uint8_t *mask = get_wedge_mask_inplace(w, 0, sb_type);
+        int avg = 0;
+        for (i = 0; i < bw; ++i) avg += mask[i];
+        for (i = 1; i < bh; ++i) avg += mask[i * MASK_MASTER_STRIDE];
+        avg = (avg + (bw + bh - 1) / 2) / (bw + bh - 1);
+        // Default sign of this wedge is 1 if the average < 32, 0 otherwise.
+        // If default sign is 1:
+        //   If sign requested is 0, we need to flip the sign and return
+        //   the complement i.e. index [1] instead. If sign requested is 1
+        //   we need to flip the sign and return index [0] instead.
+        // If default sign is 0:
+        //   If sign requested is 0, we need to return index [0] the master
+        //   if sign requested is 1, we need to return the complement index [1]
+        //   instead.
+        wedge_params.signflip[w] = (avg < 32);
+      }
+    }
+  }
+}
+#endif  // !USE_PRECOMPUTED_WEDGE_SIGN
+
+static void init_wedge_masks() {
+  uint8_t *dst = wedge_mask_buf;
+  BLOCK_SIZE bsize;
+  memset(wedge_masks, 0, sizeof(wedge_masks));
+  for (bsize = BLOCK_4X4; bsize < BLOCK_SIZES_ALL; ++bsize) {
+    const uint8_t *mask;
+    const int bw = block_size_wide[bsize];
+    const int bh = block_size_high[bsize];
+    const wedge_params_type *wedge_params = &wedge_params_lookup[bsize];
+    const int wbits = wedge_params->bits;
+    const int wtypes = 1 << wbits;
+    int w;
+    if (wbits == 0) continue;
+    for (w = 0; w < wtypes; ++w) {
+      mask = get_wedge_mask_inplace(w, 0, bsize);
+      aom_convolve_copy(mask, MASK_MASTER_STRIDE, dst, bw, NULL, 0, NULL, 0, bw,
+                        bh);
+      wedge_params->masks[0][w] = dst;
+      dst += bw * bh;
+
+      mask = get_wedge_mask_inplace(w, 1, bsize);
+      aom_convolve_copy(mask, MASK_MASTER_STRIDE, dst, bw, NULL, 0, NULL, 0, bw,
+                        bh);
+      wedge_params->masks[1][w] = dst;
+      dst += bw * bh;
+    }
+    assert(sizeof(wedge_mask_buf) >= (size_t)(dst - wedge_mask_buf));
+  }
+}
+
+// Equation of line: f(x, y) = a[0]*(x - a[2]*w/8) + a[1]*(y - a[3]*h/8) = 0
+void av1_init_wedge_masks() {
+  init_wedge_master_masks();
+#if !USE_PRECOMPUTED_WEDGE_SIGN
+  init_wedge_signs();
+#endif  // !USE_PRECOMPUTED_WEDGE_SIGN
+  init_wedge_masks();
+}
+
+static void build_masked_compound_no_round(
+    uint8_t *dst, int dst_stride, const CONV_BUF_TYPE *src0, int src0_stride,
+    const CONV_BUF_TYPE *src1, int src1_stride,
+    const INTERINTER_COMPOUND_DATA *const comp_data, BLOCK_SIZE sb_type, int h,
+    int w, ConvolveParams *conv_params, MACROBLOCKD *xd) {
+  // Derive subsampling from h and w passed in. May be refactored to
+  // pass in subsampling factors directly.
+  const int subh = (2 << mi_size_high_log2[sb_type]) == h;
+  const int subw = (2 << mi_size_wide_log2[sb_type]) == w;
+  const uint8_t *mask = av1_get_compound_type_mask(comp_data, sb_type);
+  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)
+    aom_highbd_blend_a64_d16_mask(dst, dst_stride, src0, src0_stride, src1,
+                                  src1_stride, mask, block_size_wide[sb_type],
+                                  w, h, subw, subh, conv_params, xd->bd);
+  else
+    aom_lowbd_blend_a64_d16_mask(dst, dst_stride, src0, src0_stride, src1,
+                                 src1_stride, mask, block_size_wide[sb_type], w,
+                                 h, subw, subh, conv_params);
+}
+
+void av1_make_masked_inter_predictor(
+    const uint8_t *pre, int pre_stride, uint8_t *dst, int dst_stride,
+    const SubpelParams *subpel_params, const struct scale_factors *sf, int w,
+    int h, ConvolveParams *conv_params, InterpFilters interp_filters, int plane,
+    const WarpTypesAllowed *warp_types, int p_col, int p_row, int ref,
+    MACROBLOCKD *xd, int can_use_previous) {
+  MB_MODE_INFO *mi = xd->mi[0];
+  (void)dst;
+  (void)dst_stride;
+  mi->interinter_comp.seg_mask = xd->seg_mask;
+  const INTERINTER_COMPOUND_DATA *comp_data = &mi->interinter_comp;
+
+// We're going to call av1_make_inter_predictor to generate a prediction into
+// a temporary buffer, then will blend that temporary buffer with that from
+// the other reference.
+//
+#define INTER_PRED_BYTES_PER_PIXEL 2
+
+  DECLARE_ALIGNED(32, uint8_t,
+                  tmp_buf[INTER_PRED_BYTES_PER_PIXEL * MAX_SB_SQUARE]);
+#undef INTER_PRED_BYTES_PER_PIXEL
+
+  uint8_t *tmp_dst = get_buf_by_bd(xd, tmp_buf);
+
+  const int tmp_buf_stride = MAX_SB_SIZE;
+  CONV_BUF_TYPE *org_dst = conv_params->dst;
+  int org_dst_stride = conv_params->dst_stride;
+  CONV_BUF_TYPE *tmp_buf16 = (CONV_BUF_TYPE *)tmp_buf;
+  conv_params->dst = tmp_buf16;
+  conv_params->dst_stride = tmp_buf_stride;
+  assert(conv_params->do_average == 0);
+
+  // This will generate a prediction in tmp_buf for the second reference
+  av1_make_inter_predictor(pre, pre_stride, tmp_dst, MAX_SB_SIZE, subpel_params,
+                           sf, w, h, conv_params, interp_filters, warp_types,
+                           p_col, p_row, plane, ref, mi, 0, xd,
+                           can_use_previous);
+
+  if (!plane && comp_data->type == COMPOUND_DIFFWTD) {
+    av1_build_compound_diffwtd_mask_d16(
+        comp_data->seg_mask, comp_data->mask_type, org_dst, org_dst_stride,
+        tmp_buf16, tmp_buf_stride, h, w, conv_params, xd->bd);
+  }
+  build_masked_compound_no_round(dst, dst_stride, org_dst, org_dst_stride,
+                                 tmp_buf16, tmp_buf_stride, comp_data,
+                                 mi->sb_type, h, w, conv_params, xd);
+}
+
+void av1_jnt_comp_weight_assign(const AV1_COMMON *cm, const MB_MODE_INFO *mbmi,
+                                int order_idx, int *fwd_offset, int *bck_offset,
+                                int *use_jnt_comp_avg, int is_compound) {
+  assert(fwd_offset != NULL && bck_offset != NULL);
+  if (!is_compound || mbmi->compound_idx) {
+    *use_jnt_comp_avg = 0;
+    return;
+  }
+
+  *use_jnt_comp_avg = 1;
+  const int bck_idx = cm->frame_refs[mbmi->ref_frame[0] - LAST_FRAME].idx;
+  const int fwd_idx = cm->frame_refs[mbmi->ref_frame[1] - LAST_FRAME].idx;
+  const int cur_frame_index = cm->cur_frame->cur_frame_offset;
+  int bck_frame_index = 0, fwd_frame_index = 0;
+
+  if (bck_idx >= 0) {
+    bck_frame_index = cm->buffer_pool->frame_bufs[bck_idx].cur_frame_offset;
+  }
+
+  if (fwd_idx >= 0) {
+    fwd_frame_index = cm->buffer_pool->frame_bufs[fwd_idx].cur_frame_offset;
+  }
+
+  int d0 = clamp(abs(get_relative_dist(cm, fwd_frame_index, cur_frame_index)),
+                 0, MAX_FRAME_DISTANCE);
+  int d1 = clamp(abs(get_relative_dist(cm, cur_frame_index, bck_frame_index)),
+                 0, MAX_FRAME_DISTANCE);
+
+  const int order = d0 <= d1;
+
+  if (d0 == 0 || d1 == 0) {
+    *fwd_offset = quant_dist_lookup_table[order_idx][3][order];
+    *bck_offset = quant_dist_lookup_table[order_idx][3][1 - order];
+    return;
+  }
+
+  int i;
+  for (i = 0; i < 3; ++i) {
+    int c0 = quant_dist_weight[i][order];
+    int c1 = quant_dist_weight[i][!order];
+    int d0_c0 = d0 * c0;
+    int d1_c1 = d1 * c1;
+    if ((d0 > d1 && d0_c0 < d1_c1) || (d0 <= d1 && d0_c0 > d1_c1)) break;
+  }
+
+  *fwd_offset = quant_dist_lookup_table[order_idx][i][order];
+  *bck_offset = quant_dist_lookup_table[order_idx][i][1 - order];
+}
+
+void av1_setup_dst_planes(struct macroblockd_plane *planes, BLOCK_SIZE bsize,
+                          const YV12_BUFFER_CONFIG *src, int mi_row, int mi_col,
+                          const int plane_start, const int plane_end) {
+  // We use AOMMIN(num_planes, MAX_MB_PLANE) instead of num_planes to quiet
+  // the static analysis warnings.
+  for (int i = plane_start; i < AOMMIN(plane_end, MAX_MB_PLANE); ++i) {
+    struct macroblockd_plane *const pd = &planes[i];
+    const int is_uv = i > 0;
+    setup_pred_plane(&pd->dst, bsize, src->buffers[i], src->crop_widths[is_uv],
+                     src->crop_heights[is_uv], src->strides[is_uv], mi_row,
+                     mi_col, NULL, pd->subsampling_x, pd->subsampling_y);
+  }
+}
+
+void av1_setup_pre_planes(MACROBLOCKD *xd, int idx,
+                          const YV12_BUFFER_CONFIG *src, int mi_row, int mi_col,
+                          const struct scale_factors *sf,
+                          const int num_planes) {
+  if (src != NULL) {
+    // We use AOMMIN(num_planes, MAX_MB_PLANE) instead of num_planes to quiet
+    // the static analysis warnings.
+    for (int i = 0; i < AOMMIN(num_planes, MAX_MB_PLANE); ++i) {
+      struct macroblockd_plane *const pd = &xd->plane[i];
+      const int is_uv = i > 0;
+      setup_pred_plane(&pd->pre[idx], xd->mi[0]->sb_type, src->buffers[i],
+                       src->crop_widths[is_uv], src->crop_heights[is_uv],
+                       src->strides[is_uv], mi_row, mi_col, sf,
+                       pd->subsampling_x, pd->subsampling_y);
+    }
+  }
+}
+
+// obmc_mask_N[overlap_position]
+static const uint8_t obmc_mask_1[1] = { 64 };
+
+static const uint8_t obmc_mask_2[2] = { 45, 64 };
+
+static const uint8_t obmc_mask_4[4] = { 39, 50, 59, 64 };
+
+static const uint8_t obmc_mask_8[8] = { 36, 42, 48, 53, 57, 61, 64, 64 };
+
+static const uint8_t obmc_mask_16[16] = { 34, 37, 40, 43, 46, 49, 52, 54,
+                                          56, 58, 60, 61, 64, 64, 64, 64 };
+
+static const uint8_t obmc_mask_32[32] = { 33, 35, 36, 38, 40, 41, 43, 44,
+                                          45, 47, 48, 50, 51, 52, 53, 55,
+                                          56, 57, 58, 59, 60, 60, 61, 62,
+                                          64, 64, 64, 64, 64, 64, 64, 64 };
+
+static const uint8_t obmc_mask_64[64] = {
+  33, 34, 35, 35, 36, 37, 38, 39, 40, 40, 41, 42, 43, 44, 44, 44,
+  45, 46, 47, 47, 48, 49, 50, 51, 51, 51, 52, 52, 53, 54, 55, 56,
+  56, 56, 57, 57, 58, 58, 59, 60, 60, 60, 60, 60, 61, 62, 62, 62,
+  62, 62, 63, 63, 63, 63, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+};
+
+const uint8_t *av1_get_obmc_mask(int length) {
+  switch (length) {
+    case 1: return obmc_mask_1;
+    case 2: return obmc_mask_2;
+    case 4: return obmc_mask_4;
+    case 8: return obmc_mask_8;
+    case 16: return obmc_mask_16;
+    case 32: return obmc_mask_32;
+    case 64: return obmc_mask_64;
+    default: assert(0); return NULL;
+  }
+}
+
+static INLINE void increment_int_ptr(MACROBLOCKD *xd, int rel_mi_rc,
+                                     uint8_t mi_hw, MB_MODE_INFO *mi,
+                                     void *fun_ctxt, const int num_planes) {
+  (void)xd;
+  (void)rel_mi_rc;
+  (void)mi_hw;
+  (void)mi;
+  ++*(int *)fun_ctxt;
+  (void)num_planes;
+}
+
+void av1_count_overlappable_neighbors(const AV1_COMMON *cm, MACROBLOCKD *xd,
+                                      int mi_row, int mi_col) {
+  MB_MODE_INFO *mbmi = xd->mi[0];
+
+  mbmi->overlappable_neighbors[0] = 0;
+  mbmi->overlappable_neighbors[1] = 0;
+
+  if (!is_motion_variation_allowed_bsize(mbmi->sb_type)) return;
+
+  foreach_overlappable_nb_above(cm, xd, mi_col, INT_MAX, increment_int_ptr,
+                                &mbmi->overlappable_neighbors[0]);
+  foreach_overlappable_nb_left(cm, xd, mi_row, INT_MAX, increment_int_ptr,
+                               &mbmi->overlappable_neighbors[1]);
+}
+
+// HW does not support < 4x4 prediction. To limit the bandwidth requirement, if
+// block-size of current plane is smaller than 8x8, always only blend with the
+// left neighbor(s) (skip blending with the above side).
+#define DISABLE_CHROMA_U8X8_OBMC 0  // 0: one-sided obmc; 1: disable
+
+int av1_skip_u4x4_pred_in_obmc(BLOCK_SIZE bsize,
+                               const struct macroblockd_plane *pd, int dir) {
+  assert(is_motion_variation_allowed_bsize(bsize));
+
+  const BLOCK_SIZE bsize_plane =
+      get_plane_block_size(bsize, pd->subsampling_x, pd->subsampling_y);
+  switch (bsize_plane) {
+#if DISABLE_CHROMA_U8X8_OBMC
+    case BLOCK_4X4:
+    case BLOCK_8X4:
+    case BLOCK_4X8: return 1; break;
+#else
+    case BLOCK_4X4:
+    case BLOCK_8X4:
+    case BLOCK_4X8: return dir == 0; break;
+#endif
+    default: return 0;
+  }
+}
+
+void av1_modify_neighbor_predictor_for_obmc(MB_MODE_INFO *mbmi) {
+  mbmi->ref_frame[1] = NONE_FRAME;
+  mbmi->interinter_comp.type = COMPOUND_AVERAGE;
+
+  return;
+}
+
+struct obmc_inter_pred_ctxt {
+  uint8_t **adjacent;
+  int *adjacent_stride;
+};
+
+static INLINE void build_obmc_inter_pred_above(MACROBLOCKD *xd, int rel_mi_col,
+                                               uint8_t above_mi_width,
+                                               MB_MODE_INFO *above_mi,
+                                               void *fun_ctxt,
+                                               const int num_planes) {
+  (void)above_mi;
+  struct obmc_inter_pred_ctxt *ctxt = (struct obmc_inter_pred_ctxt *)fun_ctxt;
+  const BLOCK_SIZE bsize = xd->mi[0]->sb_type;
+  const int is_hbd = (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ? 1 : 0;
+  const int overlap =
+      AOMMIN(block_size_high[bsize], block_size_high[BLOCK_64X64]) >> 1;
+
+  for (int plane = 0; plane < num_planes; ++plane) {
+    const struct macroblockd_plane *pd = &xd->plane[plane];
+    const int bw = (above_mi_width * MI_SIZE) >> pd->subsampling_x;
+    const int bh = overlap >> pd->subsampling_y;
+    const int plane_col = (rel_mi_col * MI_SIZE) >> pd->subsampling_x;
+
+    if (av1_skip_u4x4_pred_in_obmc(bsize, pd, 0)) continue;
+
+    const int dst_stride = pd->dst.stride;
+    uint8_t *const dst = &pd->dst.buf[plane_col];
+    const int tmp_stride = ctxt->adjacent_stride[plane];
+    const uint8_t *const tmp = &ctxt->adjacent[plane][plane_col];
+    const uint8_t *const mask = av1_get_obmc_mask(bh);
+
+    if (is_hbd)
+      aom_highbd_blend_a64_vmask(dst, dst_stride, dst, dst_stride, tmp,
+                                 tmp_stride, mask, bw, bh, xd->bd);
+    else
+      aom_blend_a64_vmask(dst, dst_stride, dst, dst_stride, tmp, tmp_stride,
+                          mask, bw, bh);
+  }
+}
+
+static INLINE void build_obmc_inter_pred_left(MACROBLOCKD *xd, int rel_mi_row,
+                                              uint8_t left_mi_height,
+                                              MB_MODE_INFO *left_mi,
+                                              void *fun_ctxt,
+                                              const int num_planes) {
+  (void)left_mi;
+  struct obmc_inter_pred_ctxt *ctxt = (struct obmc_inter_pred_ctxt *)fun_ctxt;
+  const BLOCK_SIZE bsize = xd->mi[0]->sb_type;
+  const int overlap =
+      AOMMIN(block_size_wide[bsize], block_size_wide[BLOCK_64X64]) >> 1;
+  const int is_hbd = (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ? 1 : 0;
+
+  for (int plane = 0; plane < num_planes; ++plane) {
+    const struct macroblockd_plane *pd = &xd->plane[plane];
+    const int bw = overlap >> pd->subsampling_x;
+    const int bh = (left_mi_height * MI_SIZE) >> pd->subsampling_y;
+    const int plane_row = (rel_mi_row * MI_SIZE) >> pd->subsampling_y;
+
+    if (av1_skip_u4x4_pred_in_obmc(bsize, pd, 1)) continue;
+
+    const int dst_stride = pd->dst.stride;
+    uint8_t *const dst = &pd->dst.buf[plane_row * dst_stride];
+    const int tmp_stride = ctxt->adjacent_stride[plane];
+    const uint8_t *const tmp = &ctxt->adjacent[plane][plane_row * tmp_stride];
+    const uint8_t *const mask = av1_get_obmc_mask(bw);
+
+    if (is_hbd)
+      aom_highbd_blend_a64_hmask(dst, dst_stride, dst, dst_stride, tmp,
+                                 tmp_stride, mask, bw, bh, xd->bd);
+    else
+      aom_blend_a64_hmask(dst, dst_stride, dst, dst_stride, tmp, tmp_stride,
+                          mask, bw, bh);
+  }
+}
+
+// This function combines motion compensated predictions that are generated by
+// top/left neighboring blocks' inter predictors with the regular inter
+// prediction. We assume the original prediction (bmc) is stored in
+// xd->plane[].dst.buf
+void av1_build_obmc_inter_prediction(const AV1_COMMON *cm, MACROBLOCKD *xd,
+                                     int mi_row, int mi_col,
+                                     uint8_t *above[MAX_MB_PLANE],
+                                     int above_stride[MAX_MB_PLANE],
+                                     uint8_t *left[MAX_MB_PLANE],
+                                     int left_stride[MAX_MB_PLANE]) {
+  const BLOCK_SIZE bsize = xd->mi[0]->sb_type;
+
+  // handle above row
+  struct obmc_inter_pred_ctxt ctxt_above = { above, above_stride };
+  foreach_overlappable_nb_above(cm, xd, mi_col,
+                                max_neighbor_obmc[mi_size_wide_log2[bsize]],
+                                build_obmc_inter_pred_above, &ctxt_above);
+
+  // handle left column
+  struct obmc_inter_pred_ctxt ctxt_left = { left, left_stride };
+  foreach_overlappable_nb_left(cm, xd, mi_row,
+                               max_neighbor_obmc[mi_size_high_log2[bsize]],
+                               build_obmc_inter_pred_left, &ctxt_left);
+}
+
+void av1_setup_build_prediction_by_above_pred(
+    MACROBLOCKD *xd, int rel_mi_col, uint8_t above_mi_width,
+    MB_MODE_INFO *above_mbmi, struct build_prediction_ctxt *ctxt,
+    const int num_planes) {
+  const BLOCK_SIZE a_bsize = AOMMAX(BLOCK_8X8, above_mbmi->sb_type);
+  const int above_mi_col = ctxt->mi_col + rel_mi_col;
+
+  av1_modify_neighbor_predictor_for_obmc(above_mbmi);
+
+  for (int j = 0; j < num_planes; ++j) {
+    struct macroblockd_plane *const pd = &xd->plane[j];
+    setup_pred_plane(&pd->dst, a_bsize, ctxt->tmp_buf[j], ctxt->tmp_width[j],
+                     ctxt->tmp_height[j], ctxt->tmp_stride[j], 0, rel_mi_col,
+                     NULL, pd->subsampling_x, pd->subsampling_y);
+  }
+
+  const int num_refs = 1 + has_second_ref(above_mbmi);
+
+  for (int ref = 0; ref < num_refs; ++ref) {
+    const MV_REFERENCE_FRAME frame = above_mbmi->ref_frame[ref];
+
+    const RefBuffer *const ref_buf = &ctxt->cm->frame_refs[frame - LAST_FRAME];
+
+    xd->block_refs[ref] = ref_buf;
+    if ((!av1_is_valid_scale(&ref_buf->sf)))
+      aom_internal_error(xd->error_info, AOM_CODEC_UNSUP_BITSTREAM,
+                         "Reference frame has invalid dimensions");
+    av1_setup_pre_planes(xd, ref, ref_buf->buf, ctxt->mi_row, above_mi_col,
+                         &ref_buf->sf, num_planes);
+  }
+
+  xd->mb_to_left_edge = 8 * MI_SIZE * (-above_mi_col);
+  xd->mb_to_right_edge = ctxt->mb_to_far_edge +
+                         (xd->n4_w - rel_mi_col - above_mi_width) * MI_SIZE * 8;
+}
+
+void av1_setup_build_prediction_by_left_pred(MACROBLOCKD *xd, int rel_mi_row,
+                                             uint8_t left_mi_height,
+                                             MB_MODE_INFO *left_mbmi,
+                                             struct build_prediction_ctxt *ctxt,
+                                             const int num_planes) {
+  const BLOCK_SIZE l_bsize = AOMMAX(BLOCK_8X8, left_mbmi->sb_type);
+  const int left_mi_row = ctxt->mi_row + rel_mi_row;
+
+  av1_modify_neighbor_predictor_for_obmc(left_mbmi);
+
+  for (int j = 0; j < num_planes; ++j) {
+    struct macroblockd_plane *const pd = &xd->plane[j];
+    setup_pred_plane(&pd->dst, l_bsize, ctxt->tmp_buf[j], ctxt->tmp_width[j],
+                     ctxt->tmp_height[j], ctxt->tmp_stride[j], rel_mi_row, 0,
+                     NULL, pd->subsampling_x, pd->subsampling_y);
+  }
+
+  const int num_refs = 1 + has_second_ref(left_mbmi);
+
+  for (int ref = 0; ref < num_refs; ++ref) {
+    const MV_REFERENCE_FRAME frame = left_mbmi->ref_frame[ref];
+
+    const RefBuffer *const ref_buf = &ctxt->cm->frame_refs[frame - LAST_FRAME];
+
+    xd->block_refs[ref] = ref_buf;
+    if ((!av1_is_valid_scale(&ref_buf->sf)))
+      aom_internal_error(xd->error_info, AOM_CODEC_UNSUP_BITSTREAM,
+                         "Reference frame has invalid dimensions");
+    av1_setup_pre_planes(xd, ref, ref_buf->buf, left_mi_row, ctxt->mi_col,
+                         &ref_buf->sf, num_planes);
+  }
+
+  xd->mb_to_top_edge = 8 * MI_SIZE * (-left_mi_row);
+  xd->mb_to_bottom_edge =
+      ctxt->mb_to_far_edge +
+      (xd->n4_h - rel_mi_row - left_mi_height) * MI_SIZE * 8;
+}
+
+/* clang-format off */
+static const uint8_t ii_weights1d[MAX_SB_SIZE] = {
+  60, 58, 56, 54, 52, 50, 48, 47, 45, 44, 42, 41, 39, 38, 37, 35, 34, 33, 32,
+  31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 22, 21, 20, 19, 19, 18, 18, 17, 16,
+  16, 15, 15, 14, 14, 13, 13, 12, 12, 12, 11, 11, 10, 10, 10,  9,  9,  9,  8,
+  8,  8,  8,  7,  7,  7,  7,  6,  6,  6,  6,  6,  5,  5,  5,  5,  5,  4,  4,
+  4,  4,  4,  4,  4,  4,  3,  3,  3,  3,  3,  3,  3,  3,  3,  2,  2,  2,  2,
+  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  1,  1,  1,  1,  1,  1,  1,  1,
+  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1
+};
+static uint8_t ii_size_scales[BLOCK_SIZES_ALL] = {
+    32, 16, 16, 16, 8, 8, 8, 4,
+    4,  4,  2,  2,  2, 1, 1, 1,
+    8,  8,  4,  4,  2, 2
+};
+/* clang-format on */
+
+static void build_smooth_interintra_mask(uint8_t *mask, int stride,
+                                         BLOCK_SIZE plane_bsize,
+                                         INTERINTRA_MODE mode) {
+  int i, j;
+  const int bw = block_size_wide[plane_bsize];
+  const int bh = block_size_high[plane_bsize];
+  const int size_scale = ii_size_scales[plane_bsize];
+
+  switch (mode) {
+    case II_V_PRED:
+      for (i = 0; i < bh; ++i) {
+        memset(mask, ii_weights1d[i * size_scale], bw * sizeof(mask[0]));
+        mask += stride;
+      }
+      break;
+
+    case II_H_PRED:
+      for (i = 0; i < bh; ++i) {
+        for (j = 0; j < bw; ++j) mask[j] = ii_weights1d[j * size_scale];
+        mask += stride;
+      }
+      break;
+
+    case II_SMOOTH_PRED:
+      for (i = 0; i < bh; ++i) {
+        for (j = 0; j < bw; ++j)
+          mask[j] = ii_weights1d[(i < j ? i : j) * size_scale];
+        mask += stride;
+      }
+      break;
+
+    case II_DC_PRED:
+    default:
+      for (i = 0; i < bh; ++i) {
+        memset(mask, 32, bw * sizeof(mask[0]));
+        mask += stride;
+      }
+      break;
+  }
+}
+
+static void combine_interintra(INTERINTRA_MODE mode, int use_wedge_interintra,
+                               int wedge_index, int wedge_sign,
+                               BLOCK_SIZE bsize, BLOCK_SIZE plane_bsize,
+                               uint8_t *comppred, int compstride,
+                               const uint8_t *interpred, int interstride,
+                               const uint8_t *intrapred, int intrastride) {
+  const int bw = block_size_wide[plane_bsize];
+  const int bh = block_size_high[plane_bsize];
+
+  if (use_wedge_interintra) {
+    if (is_interintra_wedge_used(bsize)) {
+      const uint8_t *mask =
+          av1_get_contiguous_soft_mask(wedge_index, wedge_sign, bsize);
+      const int subw = 2 * mi_size_wide[bsize] == bw;
+      const int subh = 2 * mi_size_high[bsize] == bh;
+      aom_blend_a64_mask(comppred, compstride, intrapred, intrastride,
+                         interpred, interstride, mask, block_size_wide[bsize],
+                         bw, bh, subw, subh);
+    }
+    return;
+  }
+
+  uint8_t mask[MAX_SB_SQUARE];
+  build_smooth_interintra_mask(mask, bw, plane_bsize, mode);
+  aom_blend_a64_mask(comppred, compstride, intrapred, intrastride, interpred,
+                     interstride, mask, bw, bw, bh, 0, 0);
+}
+
+static void combine_interintra_highbd(
+    INTERINTRA_MODE mode, int use_wedge_interintra, int wedge_index,
+    int wedge_sign, BLOCK_SIZE bsize, BLOCK_SIZE plane_bsize,
+    uint8_t *comppred8, int compstride, const uint8_t *interpred8,
+    int interstride, const uint8_t *intrapred8, int intrastride, int bd) {
+  const int bw = block_size_wide[plane_bsize];
+  const int bh = block_size_high[plane_bsize];
+
+  if (use_wedge_interintra) {
+    if (is_interintra_wedge_used(bsize)) {
+      const uint8_t *mask =
+          av1_get_contiguous_soft_mask(wedge_index, wedge_sign, bsize);
+      const int subh = 2 * mi_size_high[bsize] == bh;
+      const int subw = 2 * mi_size_wide[bsize] == bw;
+      aom_highbd_blend_a64_mask(comppred8, compstride, intrapred8, intrastride,
+                                interpred8, interstride, mask,
+                                block_size_wide[bsize], bw, bh, subw, subh, bd);
+    }
+    return;
+  }
+
+  uint8_t mask[MAX_SB_SQUARE];
+  build_smooth_interintra_mask(mask, bw, plane_bsize, mode);
+  aom_highbd_blend_a64_mask(comppred8, compstride, intrapred8, intrastride,
+                            interpred8, interstride, mask, bw, bw, bh, 0, 0,
+                            bd);
+}
+
+void av1_build_intra_predictors_for_interintra(const AV1_COMMON *cm,
+                                               MACROBLOCKD *xd,
+                                               BLOCK_SIZE bsize, int plane,
+                                               BUFFER_SET *ctx, uint8_t *dst,
+                                               int dst_stride) {
+  struct macroblockd_plane *const pd = &xd->plane[plane];
+  const int ssx = xd->plane[plane].subsampling_x;
+  const int ssy = xd->plane[plane].subsampling_y;
+  BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, ssx, ssy);
+  PREDICTION_MODE mode = interintra_to_intra_mode[xd->mi[0]->interintra_mode];
+  assert(xd->mi[0]->angle_delta[PLANE_TYPE_Y] == 0);
+  assert(xd->mi[0]->angle_delta[PLANE_TYPE_UV] == 0);
+  assert(xd->mi[0]->filter_intra_mode_info.use_filter_intra == 0);
+  assert(xd->mi[0]->use_intrabc == 0);
+
+  av1_predict_intra_block(cm, xd, pd->width, pd->height,
+                          max_txsize_rect_lookup[plane_bsize], mode, 0, 0,
+                          FILTER_INTRA_MODES, ctx->plane[plane],
+                          ctx->stride[plane], dst, dst_stride, 0, 0, plane);
+}
+
+void av1_combine_interintra(MACROBLOCKD *xd, BLOCK_SIZE bsize, int plane,
+                            const uint8_t *inter_pred, int inter_stride,
+                            const uint8_t *intra_pred, int intra_stride) {
+  const int ssx = xd->plane[plane].subsampling_x;
+  const int ssy = xd->plane[plane].subsampling_y;
+  const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, ssx, ssy);
+  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
+    combine_interintra_highbd(
+        xd->mi[0]->interintra_mode, xd->mi[0]->use_wedge_interintra,
+        xd->mi[0]->interintra_wedge_index, xd->mi[0]->interintra_wedge_sign,
+        bsize, plane_bsize, xd->plane[plane].dst.buf,
+        xd->plane[plane].dst.stride, inter_pred, inter_stride, intra_pred,
+        intra_stride, xd->bd);
+    return;
+  }
+  combine_interintra(
+      xd->mi[0]->interintra_mode, xd->mi[0]->use_wedge_interintra,
+      xd->mi[0]->interintra_wedge_index, xd->mi[0]->interintra_wedge_sign,
+      bsize, plane_bsize, xd->plane[plane].dst.buf, xd->plane[plane].dst.stride,
+      inter_pred, inter_stride, intra_pred, intra_stride);
+}
+
+// build interintra_predictors for one plane
+void av1_build_interintra_predictors_sbp(const AV1_COMMON *cm, MACROBLOCKD *xd,
+                                         uint8_t *pred, int stride,
+                                         BUFFER_SET *ctx, int plane,
+                                         BLOCK_SIZE bsize) {
+  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
+    DECLARE_ALIGNED(16, uint16_t, intrapredictor[MAX_SB_SQUARE]);
+    av1_build_intra_predictors_for_interintra(
+        cm, xd, bsize, plane, ctx, CONVERT_TO_BYTEPTR(intrapredictor),
+        MAX_SB_SIZE);
+    av1_combine_interintra(xd, bsize, plane, pred, stride,
+                           CONVERT_TO_BYTEPTR(intrapredictor), MAX_SB_SIZE);
+  } else {
+    DECLARE_ALIGNED(16, uint8_t, intrapredictor[MAX_SB_SQUARE]);
+    av1_build_intra_predictors_for_interintra(cm, xd, bsize, plane, ctx,
+                                              intrapredictor, MAX_SB_SIZE);
+    av1_combine_interintra(xd, bsize, plane, pred, stride, intrapredictor,
+                           MAX_SB_SIZE);
+  }
+}
+
+void av1_build_interintra_predictors_sbuv(const AV1_COMMON *cm, MACROBLOCKD *xd,
+                                          uint8_t *upred, uint8_t *vpred,
+                                          int ustride, int vstride,
+                                          BUFFER_SET *ctx, BLOCK_SIZE bsize) {
+  av1_build_interintra_predictors_sbp(cm, xd, upred, ustride, ctx, 1, bsize);
+  av1_build_interintra_predictors_sbp(cm, xd, vpred, vstride, ctx, 2, bsize);
+}