Import aom library

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

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 775 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/convolve.c b/third_party/aom/av1/common/convolve.c
new file mode 100644
index 000000000..eab6fe7a3
--- /dev/null
+++ b/third_party/aom/av1/common/convolve.c
@@ -0,0 +1,775 @@
+/*
+ * 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 <string.h>
+
+#include "./aom_dsp_rtcd.h"
+#include "./av1_rtcd.h"
+#include "av1/common/convolve.h"
+#include "av1/common/filter.h"
+#include "av1/common/onyxc_int.h"
+#include "aom_dsp/aom_dsp_common.h"
+#include "aom_ports/mem.h"
+
+#define MAX_BLOCK_WIDTH (MAX_SB_SIZE)
+#define MAX_BLOCK_HEIGHT (MAX_SB_SIZE)
+#define MAX_STEP (32)
+
+void av1_convolve_horiz_c(const uint8_t *src, int src_stride, uint8_t *dst,
+                          int dst_stride, int w, int h,
+                          const InterpFilterParams filter_params,
+                          const int subpel_x_q4, int x_step_q4,
+                          ConvolveParams *conv_params) {
+  int x, y;
+  int filter_size = filter_params.taps;
+  assert(conv_params->round == CONVOLVE_OPT_ROUND);
+  src -= filter_size / 2 - 1;
+  for (y = 0; y < h; ++y) {
+    int x_q4 = subpel_x_q4;
+    for (x = 0; x < w; ++x) {
+      const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS];
+      const int16_t *x_filter = av1_get_interp_filter_subpel_kernel(
+          filter_params, x_q4 & SUBPEL_MASK);
+      int k, sum = 0;
+      for (k = 0; k < filter_size; ++k) sum += src_x[k] * x_filter[k];
+
+      sum = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
+      if (conv_params->ref)
+        dst[x] = ROUND_POWER_OF_TWO(dst[x] + sum, 1);
+      else
+        dst[x] = sum;
+
+      x_q4 += x_step_q4;
+    }
+    src += src_stride;
+    dst += dst_stride;
+  }
+}
+
+void av1_convolve_vert_c(const uint8_t *src, int src_stride, uint8_t *dst,
+                         int dst_stride, int w, int h,
+                         const InterpFilterParams filter_params,
+                         const int subpel_y_q4, int y_step_q4,
+                         ConvolveParams *conv_params) {
+  int x, y;
+  int filter_size = filter_params.taps;
+  assert(conv_params->round == CONVOLVE_OPT_ROUND);
+  src -= src_stride * (filter_size / 2 - 1);
+  for (x = 0; x < w; ++x) {
+    int y_q4 = subpel_y_q4;
+    for (y = 0; y < h; ++y) {
+      const uint8_t *const src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride];
+      const int16_t *y_filter = av1_get_interp_filter_subpel_kernel(
+          filter_params, y_q4 & SUBPEL_MASK);
+      int k, sum = 0;
+      for (k = 0; k < filter_size; ++k)
+        sum += src_y[k * src_stride] * y_filter[k];
+
+      sum = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
+      if (conv_params->ref)
+        dst[y * dst_stride] = ROUND_POWER_OF_TWO(dst[y * dst_stride] + sum, 1);
+      else
+        dst[y * dst_stride] = sum;
+
+      y_q4 += y_step_q4;
+    }
+    ++src;
+    ++dst;
+  }
+}
+
+static void convolve_copy(const uint8_t *src, int src_stride, uint8_t *dst,
+                          int dst_stride, int w, int h,
+                          ConvolveParams *conv_params) {
+  assert(conv_params->round == CONVOLVE_OPT_ROUND);
+  if (conv_params->ref == 0) {
+    int r;
+    for (r = 0; r < h; ++r) {
+      memcpy(dst, src, w);
+      src += src_stride;
+      dst += dst_stride;
+    }
+  } else {
+    int r, c;
+    for (r = 0; r < h; ++r) {
+      for (c = 0; c < w; ++c) {
+        dst[c] = clip_pixel(ROUND_POWER_OF_TWO(dst[c] + src[c], 1));
+      }
+      src += src_stride;
+      dst += dst_stride;
+    }
+  }
+}
+
+void av1_convolve_horiz_facade(const uint8_t *src, int src_stride, uint8_t *dst,
+                               int dst_stride, int w, int h,
+                               const InterpFilterParams filter_params,
+                               const int subpel_x_q4, int x_step_q4,
+                               ConvolveParams *conv_params) {
+  assert(conv_params->round == CONVOLVE_OPT_ROUND);
+  if (filter_params.taps == SUBPEL_TAPS) {
+    const int16_t *filter_x =
+        av1_get_interp_filter_subpel_kernel(filter_params, subpel_x_q4);
+    if (conv_params->ref == 0)
+      aom_convolve8_horiz(src, src_stride, dst, dst_stride, filter_x, x_step_q4,
+                          NULL, -1, w, h);
+    else
+      aom_convolve8_avg_horiz(src, src_stride, dst, dst_stride, filter_x,
+                              x_step_q4, NULL, -1, w, h);
+  } else {
+    av1_convolve_horiz(src, src_stride, dst, dst_stride, w, h, filter_params,
+                       subpel_x_q4, x_step_q4, conv_params);
+  }
+}
+
+void av1_convolve_horiz_facade_c(const uint8_t *src, int src_stride,
+                                 uint8_t *dst, int dst_stride, int w, int h,
+                                 const InterpFilterParams filter_params,
+                                 const int subpel_x_q4, int x_step_q4,
+                                 ConvolveParams *conv_params) {
+  assert(conv_params->round == CONVOLVE_OPT_ROUND);
+  if (filter_params.taps == SUBPEL_TAPS) {
+    const int16_t *filter_x =
+        av1_get_interp_filter_subpel_kernel(filter_params, subpel_x_q4);
+    if (conv_params->ref == 0)
+      aom_convolve8_horiz_c(src, src_stride, dst, dst_stride, filter_x,
+                            x_step_q4, NULL, -1, w, h);
+    else
+      aom_convolve8_avg_horiz_c(src, src_stride, dst, dst_stride, filter_x,
+                                x_step_q4, NULL, -1, w, h);
+  } else {
+    av1_convolve_horiz_c(src, src_stride, dst, dst_stride, w, h, filter_params,
+                         subpel_x_q4, x_step_q4, conv_params);
+  }
+}
+
+void av1_convolve_vert_facade(const uint8_t *src, int src_stride, uint8_t *dst,
+                              int dst_stride, int w, int h,
+                              const InterpFilterParams filter_params,
+                              const int subpel_y_q4, int y_step_q4,
+                              ConvolveParams *conv_params) {
+  assert(conv_params->round == CONVOLVE_OPT_ROUND);
+  if (filter_params.taps == SUBPEL_TAPS) {
+    const int16_t *filter_y =
+        av1_get_interp_filter_subpel_kernel(filter_params, subpel_y_q4);
+    if (conv_params->ref == 0) {
+      aom_convolve8_vert(src, src_stride, dst, dst_stride, NULL, -1, filter_y,
+                         y_step_q4, w, h);
+    } else {
+      aom_convolve8_avg_vert(src, src_stride, dst, dst_stride, NULL, -1,
+                             filter_y, y_step_q4, w, h);
+    }
+  } else {
+    av1_convolve_vert(src, src_stride, dst, dst_stride, w, h, filter_params,
+                      subpel_y_q4, y_step_q4, conv_params);
+  }
+}
+
+void av1_convolve_vert_facade_c(const uint8_t *src, int src_stride,
+                                uint8_t *dst, int dst_stride, int w, int h,
+                                const InterpFilterParams filter_params,
+                                const int subpel_y_q4, int y_step_q4,
+                                ConvolveParams *conv_params) {
+  assert(conv_params->round == CONVOLVE_OPT_ROUND);
+  if (filter_params.taps == SUBPEL_TAPS) {
+    const int16_t *filter_y =
+        av1_get_interp_filter_subpel_kernel(filter_params, subpel_y_q4);
+    if (conv_params->ref == 0) {
+      aom_convolve8_vert_c(src, src_stride, dst, dst_stride, NULL, -1, filter_y,
+                           y_step_q4, w, h);
+    } else {
+      aom_convolve8_avg_vert_c(src, src_stride, dst, dst_stride, NULL, -1,
+                               filter_y, y_step_q4, w, h);
+    }
+  } else {
+    av1_convolve_vert_c(src, src_stride, dst, dst_stride, w, h, filter_params,
+                        subpel_y_q4, y_step_q4, conv_params);
+  }
+}
+
+#if CONFIG_CONVOLVE_ROUND
+void av1_convolve_rounding(const int32_t *src, int src_stride, uint8_t *dst,
+                           int dst_stride, int w, int h, int bits) {
+  int r, c;
+  for (r = 0; r < h; ++r) {
+    for (c = 0; c < w; ++c) {
+      dst[r * dst_stride + c] =
+          clip_pixel(ROUND_POWER_OF_TWO_SIGNED(src[r * src_stride + c], bits));
+    }
+  }
+}
+
+void av1_convolve_2d(const uint8_t *src, int src_stride, CONV_BUF_TYPE *dst,
+                     int dst_stride, int w, int h,
+                     InterpFilterParams *filter_params_x,
+                     InterpFilterParams *filter_params_y, const int subpel_x_q4,
+                     const int subpel_y_q4, ConvolveParams *conv_params) {
+  int x, y, k;
+  CONV_BUF_TYPE im_block[(MAX_SB_SIZE + MAX_FILTER_TAP - 1) * MAX_SB_SIZE];
+  int im_h = h + filter_params_y->taps - 1;
+  int im_stride = w;
+  const int fo_vert = filter_params_y->taps / 2 - 1;
+  const int fo_horiz = filter_params_x->taps / 2 - 1;
+  (void)conv_params;
+  // horizontal filter
+  const uint8_t *src_horiz = src - fo_vert * src_stride;
+  const int16_t *x_filter = av1_get_interp_filter_subpel_kernel(
+      *filter_params_x, subpel_x_q4 & SUBPEL_MASK);
+  for (y = 0; y < im_h; ++y) {
+    for (x = 0; x < w; ++x) {
+      CONV_BUF_TYPE sum = 0;
+      for (k = 0; k < filter_params_x->taps; ++k) {
+        sum += x_filter[k] * src_horiz[y * src_stride + x - fo_horiz + k];
+      }
+#if CONFIG_COMPOUND_ROUND
+      im_block[y * im_stride + x] =
+          clip_pixel(ROUND_POWER_OF_TWO_SIGNED(sum, conv_params->round_0));
+#else
+      im_block[y * im_stride + x] =
+          ROUND_POWER_OF_TWO_SIGNED(sum, conv_params->round_0);
+#endif
+    }
+  }
+
+  // vertical filter
+  CONV_BUF_TYPE *src_vert = im_block + fo_vert * im_stride;
+  const int16_t *y_filter = av1_get_interp_filter_subpel_kernel(
+      *filter_params_y, subpel_y_q4 & SUBPEL_MASK);
+  for (y = 0; y < h; ++y) {
+    for (x = 0; x < w; ++x) {
+      CONV_BUF_TYPE sum = 0;
+      for (k = 0; k < filter_params_y->taps; ++k) {
+        sum += y_filter[k] * src_vert[(y - fo_vert + k) * im_stride + x];
+      }
+      dst[y * dst_stride + x] +=
+          ROUND_POWER_OF_TWO_SIGNED(sum, conv_params->round_1);
+    }
+  }
+}
+
+static INLINE void transpose_uint8(uint8_t *dst, int dst_stride,
+                                   const uint8_t *src, int src_stride, int w,
+                                   int h) {
+  int r, c;
+  for (r = 0; r < h; ++r)
+    for (c = 0; c < w; ++c)
+      dst[c * (dst_stride) + r] = src[r * (src_stride) + c];
+}
+
+static INLINE void transpose_int32(int32_t *dst, int dst_stride,
+                                   const int32_t *src, int src_stride, int w,
+                                   int h) {
+  int r, c;
+  for (r = 0; r < h; ++r)
+    for (c = 0; c < w; ++c)
+      dst[c * (dst_stride) + r] = src[r * (src_stride) + c];
+}
+
+void av1_convolve_2d_facade(const uint8_t *src, int src_stride, uint8_t *dst,
+                            int dst_stride, int w, int h,
+                            const InterpFilter *interp_filter,
+                            const int subpel_x_q4, int x_step_q4,
+                            const int subpel_y_q4, int y_step_q4,
+                            ConvolveParams *conv_params) {
+  (void)x_step_q4;
+  (void)y_step_q4;
+  (void)dst;
+  (void)dst_stride;
+#if CONFIG_DUAL_FILTER
+  InterpFilterParams filter_params_x =
+      av1_get_interp_filter_params(interp_filter[1 + 2 * conv_params->ref]);
+  InterpFilterParams filter_params_y =
+      av1_get_interp_filter_params(interp_filter[0 + 2 * conv_params->ref]);
+
+  if (filter_params_x.interp_filter == MULTITAP_SHARP &&
+      filter_params_y.interp_filter == MULTITAP_SHARP) {
+    // Avoid two directions both using 12-tap filter.
+    // This will reduce hardware implementation cost.
+    filter_params_y = av1_get_interp_filter_params(EIGHTTAP_SHARP);
+  }
+#else
+  InterpFilterParams filter_params_x =
+      av1_get_interp_filter_params(*interp_filter);
+  InterpFilterParams filter_params_y =
+      av1_get_interp_filter_params(*interp_filter);
+#endif
+
+  if (filter_params_y.taps < filter_params_x.taps) {
+    uint8_t tr_src[(MAX_SB_SIZE + MAX_FILTER_TAP - 1) *
+                   (MAX_SB_SIZE + MAX_FILTER_TAP - 1)];
+    int tr_src_stride = MAX_SB_SIZE + MAX_FILTER_TAP - 1;
+    CONV_BUF_TYPE tr_dst[MAX_SB_SIZE * MAX_SB_SIZE];
+    int tr_dst_stride = MAX_SB_SIZE;
+    int fo_vert = filter_params_y.taps / 2 - 1;
+    int fo_horiz = filter_params_x.taps / 2 - 1;
+
+    transpose_uint8(tr_src, tr_src_stride,
+                    src - fo_vert * src_stride - fo_horiz, src_stride,
+                    w + filter_params_x.taps - 1, h + filter_params_y.taps - 1);
+    transpose_int32(tr_dst, tr_dst_stride, conv_params->dst,
+                    conv_params->dst_stride, w, h);
+
+    // horizontal and vertical parameters are swapped because of the transpose
+    av1_convolve_2d(tr_src + fo_horiz * tr_src_stride + fo_vert, tr_src_stride,
+                    tr_dst, tr_dst_stride, h, w, &filter_params_y,
+                    &filter_params_x, subpel_y_q4, subpel_x_q4, conv_params);
+    transpose_int32(conv_params->dst, conv_params->dst_stride, tr_dst,
+                    tr_dst_stride, h, w);
+  } else {
+    av1_convolve_2d(src, src_stride, conv_params->dst, conv_params->dst_stride,
+                    w, h, &filter_params_x, &filter_params_y, subpel_x_q4,
+                    subpel_y_q4, conv_params);
+  }
+}
+
+#endif  // CONFIG_CONVOLVE_ROUND
+
+typedef void (*ConvolveFunc)(const uint8_t *src, int src_stride, uint8_t *dst,
+                             int dst_stride, int w, int h,
+                             const InterpFilterParams filter_params,
+                             const int subpel_q4, int step_q4,
+                             ConvolveParams *conv_params);
+
+static void convolve_helper(const uint8_t *src, int src_stride, uint8_t *dst,
+                            int dst_stride, int w, int h,
+#if CONFIG_DUAL_FILTER
+                            const InterpFilter *interp_filter,
+#else
+                            const InterpFilter interp_filter,
+#endif
+                            const int subpel_x_q4, int x_step_q4,
+                            const int subpel_y_q4, int y_step_q4,
+                            ConvolveParams *conv_params,
+                            ConvolveFunc convolve_horiz,
+                            ConvolveFunc convolve_vert) {
+  int ignore_horiz = x_step_q4 == 16 && subpel_x_q4 == 0;
+  int ignore_vert = y_step_q4 == 16 && subpel_y_q4 == 0;
+#if CONFIG_DUAL_FILTER
+  InterpFilterParams filter_params_x =
+      av1_get_interp_filter_params(interp_filter[1 + 2 * conv_params->ref]);
+  InterpFilterParams filter_params_y =
+      av1_get_interp_filter_params(interp_filter[0 + 2 * conv_params->ref]);
+  InterpFilterParams filter_params;
+#else
+  InterpFilterParams filter_params =
+      av1_get_interp_filter_params(interp_filter);
+#endif
+  assert(conv_params->round == CONVOLVE_OPT_ROUND);
+
+  assert(w <= MAX_BLOCK_WIDTH);
+  assert(h <= MAX_BLOCK_HEIGHT);
+  assert(y_step_q4 <= MAX_STEP);
+  assert(x_step_q4 <= MAX_STEP);
+
+  if (ignore_horiz && ignore_vert) {
+    convolve_copy(src, src_stride, dst, dst_stride, w, h, conv_params);
+  } else if (ignore_vert) {
+#if CONFIG_DUAL_FILTER
+    filter_params = filter_params_x;
+#endif
+    assert(filter_params.taps <= MAX_FILTER_TAP);
+    convolve_horiz(src, src_stride, dst, dst_stride, w, h, filter_params,
+                   subpel_x_q4, x_step_q4, conv_params);
+  } else if (ignore_horiz) {
+#if CONFIG_DUAL_FILTER
+    filter_params = filter_params_y;
+#endif
+    assert(filter_params.taps <= MAX_FILTER_TAP);
+    convolve_vert(src, src_stride, dst, dst_stride, w, h, filter_params,
+                  subpel_y_q4, y_step_q4, conv_params);
+  } else {
+    // temp's size is set to a 256 aligned value to facilitate SIMD
+    // implementation. The value is greater than (maximum possible intermediate
+    // height or width) * MAX_SB_SIZE
+    DECLARE_ALIGNED(16, uint8_t,
+                    temp[((MAX_SB_SIZE * 2 + 16) + 16) * MAX_SB_SIZE]);
+    int max_intermediate_size = ((MAX_SB_SIZE * 2 + 16) + 16);
+    int filter_size;
+#if CONFIG_DUAL_FILTER
+    if (interp_filter[0 + 2 * conv_params->ref] == MULTITAP_SHARP &&
+        interp_filter[1 + 2 * conv_params->ref] == MULTITAP_SHARP) {
+      // Avoid two directions both using 12-tap filter.
+      // This will reduce hardware implementation cost.
+      filter_params_y = av1_get_interp_filter_params(EIGHTTAP_SHARP);
+    }
+
+    // we do filter with fewer taps first to reduce hardware implementation
+    // complexity
+    if (filter_params_y.taps < filter_params_x.taps) {
+      int intermediate_width;
+      int temp_stride = max_intermediate_size;
+      ConvolveParams temp_conv_params;
+      temp_conv_params.ref = 0;
+      temp_conv_params.round = CONVOLVE_OPT_ROUND;
+      filter_params = filter_params_y;
+      filter_size = filter_params_x.taps;
+      intermediate_width =
+          (((w - 1) * x_step_q4 + subpel_x_q4) >> SUBPEL_BITS) + filter_size;
+      assert(intermediate_width <= max_intermediate_size);
+
+      assert(filter_params.taps <= MAX_FILTER_TAP);
+
+      convolve_vert(src - (filter_size / 2 - 1), src_stride, temp, temp_stride,
+                    intermediate_width, h, filter_params, subpel_y_q4,
+                    y_step_q4, &temp_conv_params);
+
+      filter_params = filter_params_x;
+      assert(filter_params.taps <= MAX_FILTER_TAP);
+      convolve_horiz(temp + (filter_size / 2 - 1), temp_stride, dst, dst_stride,
+                     w, h, filter_params, subpel_x_q4, x_step_q4, conv_params);
+    } else
+#endif  // CONFIG_DUAL_FILTER
+    {
+      int intermediate_height;
+      int temp_stride = MAX_SB_SIZE;
+      ConvolveParams temp_conv_params;
+      temp_conv_params.ref = 0;
+      temp_conv_params.round = CONVOLVE_OPT_ROUND;
+#if CONFIG_DUAL_FILTER
+      filter_params = filter_params_x;
+      filter_size = filter_params_y.taps;
+#else
+      filter_size = filter_params.taps;
+#endif
+      intermediate_height =
+          (((h - 1) * y_step_q4 + subpel_y_q4) >> SUBPEL_BITS) + filter_size;
+      assert(intermediate_height <= max_intermediate_size);
+      (void)max_intermediate_size;
+
+      assert(filter_params.taps <= MAX_FILTER_TAP);
+
+      convolve_horiz(src - src_stride * (filter_size / 2 - 1), src_stride, temp,
+                     temp_stride, w, intermediate_height, filter_params,
+                     subpel_x_q4, x_step_q4, &temp_conv_params);
+
+#if CONFIG_DUAL_FILTER
+      filter_params = filter_params_y;
+#endif
+      assert(filter_params.taps <= MAX_FILTER_TAP);
+
+      convolve_vert(temp + temp_stride * (filter_size / 2 - 1), temp_stride,
+                    dst, dst_stride, w, h, filter_params, subpel_y_q4,
+                    y_step_q4, conv_params);
+    }
+  }
+}
+
+void av1_convolve(const uint8_t *src, int src_stride, uint8_t *dst,
+                  int dst_stride, int w, int h,
+#if CONFIG_DUAL_FILTER
+                  const InterpFilter *interp_filter,
+#else
+                  const InterpFilter interp_filter,
+#endif
+                  const int subpel_x_q4, int x_step_q4, const int subpel_y_q4,
+                  int y_step_q4, ConvolveParams *conv_params) {
+  convolve_helper(src, src_stride, dst, dst_stride, w, h, interp_filter,
+                  subpel_x_q4, x_step_q4, subpel_y_q4, y_step_q4, conv_params,
+                  av1_convolve_horiz_facade, av1_convolve_vert_facade);
+}
+
+void av1_convolve_c(const uint8_t *src, int src_stride, uint8_t *dst,
+                    int dst_stride, int w, int h,
+#if CONFIG_DUAL_FILTER
+                    const InterpFilter *interp_filter,
+#else
+                    const InterpFilter interp_filter,
+#endif
+                    const int subpel_x_q4, int x_step_q4, const int subpel_y_q4,
+                    int y_step_q4, ConvolveParams *conv_params) {
+  convolve_helper(src, src_stride, dst, dst_stride, w, h, interp_filter,
+                  subpel_x_q4, x_step_q4, subpel_y_q4, y_step_q4, conv_params,
+                  av1_convolve_horiz_facade_c, av1_convolve_vert_facade_c);
+}
+
+void av1_lowbd_convolve_init_c(void) {
+  // A placeholder for SIMD initialization
+  return;
+}
+
+void av1_highbd_convolve_init_c(void) {
+  // A placeholder for SIMD initialization
+  return;
+}
+
+void av1_convolve_init(AV1_COMMON *cm) {
+#if CONFIG_HIGHBITDEPTH
+  if (cm->use_highbitdepth)
+    av1_highbd_convolve_init();
+  else
+    av1_lowbd_convolve_init();
+#else
+  (void)cm;
+  av1_lowbd_convolve_init();
+#endif
+  return;
+}
+
+#if CONFIG_HIGHBITDEPTH
+void av1_highbd_convolve_horiz_c(const uint16_t *src, int src_stride,
+                                 uint16_t *dst, int dst_stride, int w, int h,
+                                 const InterpFilterParams filter_params,
+                                 const int subpel_x_q4, int x_step_q4, int avg,
+                                 int bd) {
+  int x, y;
+  int filter_size = filter_params.taps;
+  src -= filter_size / 2 - 1;
+  for (y = 0; y < h; ++y) {
+    int x_q4 = subpel_x_q4;
+    for (x = 0; x < w; ++x) {
+      const uint16_t *const src_x = &src[x_q4 >> SUBPEL_BITS];
+      const int16_t *x_filter = av1_get_interp_filter_subpel_kernel(
+          filter_params, x_q4 & SUBPEL_MASK);
+      int k, sum = 0;
+      for (k = 0; k < filter_size; ++k) sum += src_x[k] * x_filter[k];
+      if (avg)
+        dst[x] = ROUND_POWER_OF_TWO(
+            dst[x] +
+                clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd),
+            1);
+      else
+        dst[x] = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd);
+      x_q4 += x_step_q4;
+    }
+    src += src_stride;
+    dst += dst_stride;
+  }
+}
+
+void av1_highbd_convolve_vert_c(const uint16_t *src, int src_stride,
+                                uint16_t *dst, int dst_stride, int w, int h,
+                                const InterpFilterParams filter_params,
+                                const int subpel_y_q4, int y_step_q4, int avg,
+                                int bd) {
+  int x, y;
+  int filter_size = filter_params.taps;
+  src -= src_stride * (filter_size / 2 - 1);
+
+  for (x = 0; x < w; ++x) {
+    int y_q4 = subpel_y_q4;
+    for (y = 0; y < h; ++y) {
+      const uint16_t *const src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride];
+      const int16_t *y_filter = av1_get_interp_filter_subpel_kernel(
+          filter_params, y_q4 & SUBPEL_MASK);
+      int k, sum = 0;
+      for (k = 0; k < filter_size; ++k)
+        sum += src_y[k * src_stride] * y_filter[k];
+      if (avg) {
+        dst[y * dst_stride] = ROUND_POWER_OF_TWO(
+            dst[y * dst_stride] +
+                clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd),
+            1);
+      } else {
+        dst[y * dst_stride] =
+            clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd);
+      }
+      y_q4 += y_step_q4;
+    }
+    ++src;
+    ++dst;
+  }
+}
+
+static void highbd_convolve_copy(const uint16_t *src, int src_stride,
+                                 uint16_t *dst, int dst_stride, int w, int h,
+                                 int avg, int bd) {
+  if (avg == 0) {
+    int r;
+    for (r = 0; r < h; ++r) {
+      memcpy(dst, src, w * sizeof(*src));
+      src += src_stride;
+      dst += dst_stride;
+    }
+  } else {
+    int r, c;
+    for (r = 0; r < h; ++r) {
+      for (c = 0; c < w; ++c) {
+        dst[c] = clip_pixel_highbd(ROUND_POWER_OF_TWO(dst[c] + src[c], 1), bd);
+      }
+      src += src_stride;
+      dst += dst_stride;
+    }
+  }
+}
+
+void av1_highbd_convolve_horiz_facade(const uint8_t *src8, int src_stride,
+                                      uint8_t *dst8, int dst_stride, int w,
+                                      int h,
+                                      const InterpFilterParams filter_params,
+                                      const int subpel_x_q4, int x_step_q4,
+                                      int avg, int bd) {
+  uint16_t *src = CONVERT_TO_SHORTPTR(src8);
+  uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
+  if (filter_params.taps == SUBPEL_TAPS) {
+    const int16_t *filter_x =
+        av1_get_interp_filter_subpel_kernel(filter_params, subpel_x_q4);
+    if (avg == 0)
+      aom_highbd_convolve8_horiz(src8, src_stride, dst8, dst_stride, filter_x,
+                                 x_step_q4, NULL, -1, w, h, bd);
+    else
+      aom_highbd_convolve8_avg_horiz(src8, src_stride, dst8, dst_stride,
+                                     filter_x, x_step_q4, NULL, -1, w, h, bd);
+  } else {
+    av1_highbd_convolve_horiz(src, src_stride, dst, dst_stride, w, h,
+                              filter_params, subpel_x_q4, x_step_q4, avg, bd);
+  }
+}
+
+void av1_highbd_convolve_vert_facade(const uint8_t *src8, int src_stride,
+                                     uint8_t *dst8, int dst_stride, int w,
+                                     int h,
+                                     const InterpFilterParams filter_params,
+                                     const int subpel_y_q4, int y_step_q4,
+                                     int avg, int bd) {
+  uint16_t *src = CONVERT_TO_SHORTPTR(src8);
+  uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
+
+  if (filter_params.taps == SUBPEL_TAPS) {
+    const int16_t *filter_y =
+        av1_get_interp_filter_subpel_kernel(filter_params, subpel_y_q4);
+    if (avg == 0) {
+      aom_highbd_convolve8_vert(src8, src_stride, dst8, dst_stride, NULL, -1,
+                                filter_y, y_step_q4, w, h, bd);
+    } else {
+      aom_highbd_convolve8_avg_vert(src8, src_stride, dst8, dst_stride, NULL,
+                                    -1, filter_y, y_step_q4, w, h, bd);
+    }
+  } else {
+    av1_highbd_convolve_vert(src, src_stride, dst, dst_stride, w, h,
+                             filter_params, subpel_y_q4, y_step_q4, avg, bd);
+  }
+}
+
+void av1_highbd_convolve(const uint8_t *src8, int src_stride, uint8_t *dst8,
+                         int dst_stride, int w, int h,
+#if CONFIG_DUAL_FILTER
+                         const InterpFilter *interp_filter,
+#else
+                         const InterpFilter interp_filter,
+#endif
+                         const int subpel_x_q4, int x_step_q4,
+                         const int subpel_y_q4, int y_step_q4, int ref_idx,
+                         int bd) {
+  uint16_t *src = CONVERT_TO_SHORTPTR(src8);
+  uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
+  int ignore_horiz = x_step_q4 == 16 && subpel_x_q4 == 0;
+  int ignore_vert = y_step_q4 == 16 && subpel_y_q4 == 0;
+
+  assert(w <= MAX_BLOCK_WIDTH);
+  assert(h <= MAX_BLOCK_HEIGHT);
+  assert(y_step_q4 <= MAX_STEP);
+  assert(x_step_q4 <= MAX_STEP);
+
+  if (ignore_horiz && ignore_vert) {
+    highbd_convolve_copy(src, src_stride, dst, dst_stride, w, h, ref_idx, bd);
+  } else if (ignore_vert) {
+#if CONFIG_DUAL_FILTER
+    InterpFilterParams filter_params =
+        av1_get_interp_filter_params(interp_filter[1 + 2 * ref_idx]);
+#else
+    InterpFilterParams filter_params =
+        av1_get_interp_filter_params(interp_filter);
+#endif
+    av1_highbd_convolve_horiz_facade(src8, src_stride, dst8, dst_stride, w, h,
+                                     filter_params, subpel_x_q4, x_step_q4,
+                                     ref_idx, bd);
+  } else if (ignore_horiz) {
+#if CONFIG_DUAL_FILTER
+    InterpFilterParams filter_params =
+        av1_get_interp_filter_params(interp_filter[0 + 2 * ref_idx]);
+#else
+    InterpFilterParams filter_params =
+        av1_get_interp_filter_params(interp_filter);
+#endif
+    av1_highbd_convolve_vert_facade(src8, src_stride, dst8, dst_stride, w, h,
+                                    filter_params, subpel_y_q4, y_step_q4,
+                                    ref_idx, bd);
+  } else {
+    // temp's size is set to a 256 aligned value to facilitate SIMD
+    // implementation. The value is greater than (maximum possible intermediate
+    // height or width) * MAX_SB_SIZE
+    DECLARE_ALIGNED(16, uint16_t,
+                    temp[((MAX_SB_SIZE * 2 + 16) + 16) * MAX_SB_SIZE]);
+    uint8_t *temp8 = CONVERT_TO_BYTEPTR(temp);
+    int max_intermediate_size = ((MAX_SB_SIZE * 2 + 16) + 16);
+    int filter_size;
+    InterpFilterParams filter_params;
+#if CONFIG_DUAL_FILTER
+    InterpFilterParams filter_params_x =
+        av1_get_interp_filter_params(interp_filter[1 + 2 * ref_idx]);
+    InterpFilterParams filter_params_y =
+        av1_get_interp_filter_params(interp_filter[0 + 2 * ref_idx]);
+    if (interp_filter[0 + 2 * ref_idx] == MULTITAP_SHARP &&
+        interp_filter[1 + 2 * ref_idx] == MULTITAP_SHARP) {
+      // Avoid two directions both using 12-tap filter.
+      // This will reduce hardware implementation cost.
+      filter_params_y = av1_get_interp_filter_params(EIGHTTAP_SHARP);
+    }
+#endif
+
+#if CONFIG_DUAL_FILTER
+    if (filter_params_y.taps < filter_params_x.taps) {
+      int intermediate_width;
+      int temp_stride = max_intermediate_size;
+      filter_params = filter_params_y;
+      filter_size = filter_params_x.taps;
+      intermediate_width =
+          (((w - 1) * x_step_q4 + subpel_x_q4) >> SUBPEL_BITS) + filter_size;
+      assert(intermediate_width <= max_intermediate_size);
+
+      assert(filter_params.taps <= MAX_FILTER_TAP);
+
+      av1_highbd_convolve_vert_facade(
+          src8 - (filter_size / 2 - 1), src_stride, temp8, temp_stride,
+          intermediate_width, h, filter_params, subpel_y_q4, y_step_q4, 0, bd);
+
+      filter_params = filter_params_x;
+      assert(filter_params.taps <= MAX_FILTER_TAP);
+
+      av1_highbd_convolve_horiz_facade(
+          temp8 + (filter_size / 2 - 1), temp_stride, dst8, dst_stride, w, h,
+          filter_params, subpel_x_q4, x_step_q4, ref_idx, bd);
+    } else
+#endif  // CONFIG_DUAL_FILTER
+    {
+      int intermediate_height;
+      int temp_stride = MAX_SB_SIZE;
+#if CONFIG_DUAL_FILTER
+      filter_params = filter_params_x;
+      filter_size = filter_params_y.taps;
+#else
+      filter_params = av1_get_interp_filter_params(interp_filter);
+      filter_size = filter_params.taps;
+#endif
+      intermediate_height =
+          (((h - 1) * y_step_q4 + subpel_y_q4) >> SUBPEL_BITS) + filter_size;
+      assert(intermediate_height <= max_intermediate_size);
+      (void)max_intermediate_size;
+
+      av1_highbd_convolve_horiz_facade(
+          src8 - src_stride * (filter_size / 2 - 1), src_stride, temp8,
+          temp_stride, w, intermediate_height, filter_params, subpel_x_q4,
+          x_step_q4, 0, bd);
+
+#if CONFIG_DUAL_FILTER
+      filter_params = filter_params_y;
+#endif
+      filter_size = filter_params.taps;
+      assert(filter_params.taps <= MAX_FILTER_TAP);
+
+      av1_highbd_convolve_vert_facade(
+          temp8 + temp_stride * (filter_size / 2 - 1), temp_stride, dst8,
+          dst_stride, w, h, filter_params, subpel_y_q4, y_step_q4, ref_idx, bd);
+    }
+  }
+}
+#endif  // CONFIG_HIGHBITDEPTH