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diff --git a/third_party/aom/av1/common/cdef_block.c b/third_party/aom/av1/common/cdef_block.c
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+/*
+ * 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 <math.h>
+#include <stdlib.h>
+
+#include "config/aom_dsp_rtcd.h"
+#include "config/av1_rtcd.h"
+
+#include "av1/common/cdef.h"
+/*
+This is Cdef_Directions (section 7.15.3) with 2 padding entries at the
+beginning and end of the table. The cdef direction range is [0, 7] and the
+first index is offset +/-2. This removes the need to constrain the first
+index to the same range using e.g., & 7.
+*/
+DECLARE_ALIGNED(16, const int, cdef_directions_padded[12][2]) = {
+ /* Padding: cdef_directions[6] */
+ { 1 * CDEF_BSTRIDE + 0, 2 * CDEF_BSTRIDE + 0 },
+ /* Padding: cdef_directions[7] */
+ { 1 * CDEF_BSTRIDE + 0, 2 * CDEF_BSTRIDE - 1 },
+
+ /* Begin cdef_directions */
+ { -1 * CDEF_BSTRIDE + 1, -2 * CDEF_BSTRIDE + 2 },
+ { 0 * CDEF_BSTRIDE + 1, -1 * CDEF_BSTRIDE + 2 },
+ { 0 * CDEF_BSTRIDE + 1, 0 * CDEF_BSTRIDE + 2 },
+ { 0 * CDEF_BSTRIDE + 1, 1 * CDEF_BSTRIDE + 2 },
+ { 1 * CDEF_BSTRIDE + 1, 2 * CDEF_BSTRIDE + 2 },
+ { 1 * CDEF_BSTRIDE + 0, 2 * CDEF_BSTRIDE + 1 },
+ { 1 * CDEF_BSTRIDE + 0, 2 * CDEF_BSTRIDE + 0 },
+ { 1 * CDEF_BSTRIDE + 0, 2 * CDEF_BSTRIDE - 1 },
+ /* End cdef_directions */
+
+ /* Padding: cdef_directions[0] */
+ { -1 * CDEF_BSTRIDE + 1, -2 * CDEF_BSTRIDE + 2 },
+ /* Padding: cdef_directions[1] */
+ { 0 * CDEF_BSTRIDE + 1, -1 * CDEF_BSTRIDE + 2 },
+};
+
+const int (*const cdef_directions)[2] = cdef_directions_padded + 2;
+
+/* Detect direction. 0 means 45-degree up-right, 2 is horizontal, and so on.
+ The search minimizes the weighted variance along all the lines in a
+ particular direction, i.e. the squared error between the input and a
+ "predicted" block where each pixel is replaced by the average along a line
+ in a particular direction. Since each direction have the same sum(x^2) term,
+ that term is never computed. See Section 2, step 2, of:
+ http://jmvalin.ca/notes/intra_paint.pdf */
+int cdef_find_dir_c(const uint16_t *img, int stride, int32_t *var,
+ int coeff_shift) {
+ int i;
+ int32_t cost[8] = { 0 };
+ int partial[8][15] = { { 0 } };
+ int32_t best_cost = 0;
+ int best_dir = 0;
+ /* Instead of dividing by n between 2 and 8, we multiply by 3*5*7*8/n.
+ The output is then 840 times larger, but we don't care for finding
+ the max. */
+ static const int div_table[] = { 0, 840, 420, 280, 210, 168, 140, 120, 105 };
+ for (i = 0; i < 8; i++) {
+ int j;
+ for (j = 0; j < 8; j++) {
+ int x;
+ /* We subtract 128 here to reduce the maximum range of the squared
+ partial sums. */
+ x = (img[i * stride + j] >> coeff_shift) - 128;
+ partial[0][i + j] += x;
+ partial[1][i + j / 2] += x;
+ partial[2][i] += x;
+ partial[3][3 + i - j / 2] += x;
+ partial[4][7 + i - j] += x;
+ partial[5][3 - i / 2 + j] += x;
+ partial[6][j] += x;
+ partial[7][i / 2 + j] += x;
+ }
+ }
+ for (i = 0; i < 8; i++) {
+ cost[2] += partial[2][i] * partial[2][i];
+ cost[6] += partial[6][i] * partial[6][i];
+ }
+ cost[2] *= div_table[8];
+ cost[6] *= div_table[8];
+ for (i = 0; i < 7; i++) {
+ cost[0] += (partial[0][i] * partial[0][i] +
+ partial[0][14 - i] * partial[0][14 - i]) *
+ div_table[i + 1];
+ cost[4] += (partial[4][i] * partial[4][i] +
+ partial[4][14 - i] * partial[4][14 - i]) *
+ div_table[i + 1];
+ }
+ cost[0] += partial[0][7] * partial[0][7] * div_table[8];
+ cost[4] += partial[4][7] * partial[4][7] * div_table[8];
+ for (i = 1; i < 8; i += 2) {
+ int j;
+ for (j = 0; j < 4 + 1; j++) {
+ cost[i] += partial[i][3 + j] * partial[i][3 + j];
+ }
+ cost[i] *= div_table[8];
+ for (j = 0; j < 4 - 1; j++) {
+ cost[i] += (partial[i][j] * partial[i][j] +
+ partial[i][10 - j] * partial[i][10 - j]) *
+ div_table[2 * j + 2];
+ }
+ }
+ for (i = 0; i < 8; i++) {
+ if (cost[i] > best_cost) {
+ best_cost = cost[i];
+ best_dir = i;
+ }
+ }
+ /* Difference between the optimal variance and the variance along the
+ orthogonal direction. Again, the sum(x^2) terms cancel out. */
+ *var = best_cost - cost[(best_dir + 4) & 7];
+ /* We'd normally divide by 840, but dividing by 1024 is close enough
+ for what we're going to do with this. */
+ *var >>= 10;
+ return best_dir;
+}
+
+void cdef_find_dir_dual_c(const uint16_t *img1, const uint16_t *img2,
+ int stride, int32_t *var1, int32_t *var2,
+ int coeff_shift, int *out1, int *out2) {
+ *out1 = cdef_find_dir_c(img1, stride, var1, coeff_shift);
+ *out2 = cdef_find_dir_c(img2, stride, var2, coeff_shift);
+}
+
+const int cdef_pri_taps[2][2] = { { 4, 2 }, { 3, 3 } };
+const int cdef_sec_taps[2] = { 2, 1 };
+
+/* Smooth in the direction detected. */
+static void cdef_filter_block_internal(
+ uint8_t *dst8, uint16_t *dst16, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir, int pri_damping,
+ int sec_damping, int coeff_shift, int block_width, int block_height,
+ int enable_primary, int enable_secondary) {
+ const int clipping_required = (enable_primary && enable_secondary);
+ int i, j, k;
+ const int s = CDEF_BSTRIDE;
+ const int *pri_taps = cdef_pri_taps[(pri_strength >> coeff_shift) & 1];
+ const int *sec_taps = cdef_sec_taps;
+ for (i = 0; i < block_height; i++) {
+ for (j = 0; j < block_width; j++) {
+ int16_t sum = 0;
+ int16_t y;
+ int16_t x = in[i * s + j];
+ int max = x;
+ int min = x;
+ for (k = 0; k < 2; k++) {
+ if (enable_primary) {
+ int16_t p0 = in[i * s + j + cdef_directions[dir][k]];
+ int16_t p1 = in[i * s + j - cdef_directions[dir][k]];
+ sum += pri_taps[k] * constrain(p0 - x, pri_strength, pri_damping);
+ sum += pri_taps[k] * constrain(p1 - x, pri_strength, pri_damping);
+ if (clipping_required) {
+ if (p0 != CDEF_VERY_LARGE) max = AOMMAX(p0, max);
+ if (p1 != CDEF_VERY_LARGE) max = AOMMAX(p1, max);
+ min = AOMMIN(p0, min);
+ min = AOMMIN(p1, min);
+ }
+ }
+ if (enable_secondary) {
+ int16_t s0 = in[i * s + j + cdef_directions[dir + 2][k]];
+ int16_t s1 = in[i * s + j - cdef_directions[dir + 2][k]];
+ int16_t s2 = in[i * s + j + cdef_directions[dir - 2][k]];
+ int16_t s3 = in[i * s + j - cdef_directions[dir - 2][k]];
+ if (clipping_required) {
+ if (s0 != CDEF_VERY_LARGE) max = AOMMAX(s0, max);
+ if (s1 != CDEF_VERY_LARGE) max = AOMMAX(s1, max);
+ if (s2 != CDEF_VERY_LARGE) max = AOMMAX(s2, max);
+ if (s3 != CDEF_VERY_LARGE) max = AOMMAX(s3, max);
+ min = AOMMIN(s0, min);
+ min = AOMMIN(s1, min);
+ min = AOMMIN(s2, min);
+ min = AOMMIN(s3, min);
+ }
+ sum += sec_taps[k] * constrain(s0 - x, sec_strength, sec_damping);
+ sum += sec_taps[k] * constrain(s1 - x, sec_strength, sec_damping);
+ sum += sec_taps[k] * constrain(s2 - x, sec_strength, sec_damping);
+ sum += sec_taps[k] * constrain(s3 - x, sec_strength, sec_damping);
+ }
+ }
+ y = ((int16_t)x + ((8 + sum - (sum < 0)) >> 4));
+ if (clipping_required) {
+ y = clamp(y, min, max);
+ }
+
+ if (dst8)
+ dst8[i * dstride + j] = (uint8_t)y;
+ else
+ dst16[i * dstride + j] = (uint16_t)y;
+ }
+ }
+}
+
+void cdef_filter_8_0_c(void *dst8, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir,
+ int pri_damping, int sec_damping, int coeff_shift,
+ int block_width, int block_height) {
+ cdef_filter_block_internal((uint8_t *)dst8, NULL, dstride, in, pri_strength,
+ sec_strength, dir, pri_damping, sec_damping,
+ coeff_shift, block_width, block_height,
+ /*enable_primary=*/1, /*enable_secondary=*/1);
+}
+
+void cdef_filter_8_1_c(void *dst8, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir,
+ int pri_damping, int sec_damping, int coeff_shift,
+ int block_width, int block_height) {
+ cdef_filter_block_internal((uint8_t *)dst8, NULL, dstride, in, pri_strength,
+ sec_strength, dir, pri_damping, sec_damping,
+ coeff_shift, block_width, block_height,
+ /*enable_primary=*/1, /*enable_secondary=*/0);
+}
+
+void cdef_filter_8_2_c(void *dst8, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir,
+ int pri_damping, int sec_damping, int coeff_shift,
+ int block_width, int block_height) {
+ cdef_filter_block_internal((uint8_t *)dst8, NULL, dstride, in, pri_strength,
+ sec_strength, dir, pri_damping, sec_damping,
+ coeff_shift, block_width, block_height,
+ /*enable_primary=*/0, /*enable_secondary=*/1);
+}
+
+void cdef_filter_8_3_c(void *dst8, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir,
+ int pri_damping, int sec_damping, int coeff_shift,
+ int block_width, int block_height) {
+ cdef_filter_block_internal((uint8_t *)dst8, NULL, dstride, in, pri_strength,
+ sec_strength, dir, pri_damping, sec_damping,
+ coeff_shift, block_width, block_height,
+ /*enable_primary=*/0, /*enable_secondary=*/0);
+}
+
+void cdef_filter_16_0_c(void *dst16, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir,
+ int pri_damping, int sec_damping, int coeff_shift,
+ int block_width, int block_height) {
+ cdef_filter_block_internal(NULL, (uint16_t *)dst16, dstride, in, pri_strength,
+ sec_strength, dir, pri_damping, sec_damping,
+ coeff_shift, block_width, block_height,
+ /*enable_primary=*/1, /*enable_secondary=*/1);
+}
+
+void cdef_filter_16_1_c(void *dst16, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir,
+ int pri_damping, int sec_damping, int coeff_shift,
+ int block_width, int block_height) {
+ cdef_filter_block_internal(NULL, (uint16_t *)dst16, dstride, in, pri_strength,
+ sec_strength, dir, pri_damping, sec_damping,
+ coeff_shift, block_width, block_height,
+ /*enable_primary=*/1, /*enable_secondary=*/0);
+}
+
+void cdef_filter_16_2_c(void *dst16, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir,
+ int pri_damping, int sec_damping, int coeff_shift,
+ int block_width, int block_height) {
+ cdef_filter_block_internal(NULL, (uint16_t *)dst16, dstride, in, pri_strength,
+ sec_strength, dir, pri_damping, sec_damping,
+ coeff_shift, block_width, block_height,
+ /*enable_primary=*/0, /*enable_secondary=*/1);
+}
+
+void cdef_filter_16_3_c(void *dst16, int dstride, const uint16_t *in,
+ int pri_strength, int sec_strength, int dir,
+ int pri_damping, int sec_damping, int coeff_shift,
+ int block_width, int block_height) {
+ cdef_filter_block_internal(NULL, (uint16_t *)dst16, dstride, in, pri_strength,
+ sec_strength, dir, pri_damping, sec_damping,
+ coeff_shift, block_width, block_height,
+ /*enable_primary=*/0, /*enable_secondary=*/0);
+}
+
+/* Compute the primary filter strength for an 8x8 block based on the
+ directional variance difference. A high variance difference means
+ that we have a highly directional pattern (e.g. a high contrast
+ edge), so we can apply more deringing. A low variance means that we
+ either have a low contrast edge, or a non-directional texture, so
+ we want to be careful not to blur. */
+static INLINE int adjust_strength(int strength, int32_t var) {
+ const int i = var >> 6 ? AOMMIN(get_msb(var >> 6), 12) : 0;
+ /* We use the variance of 8x8 blocks to adjust the strength. */
+ return var ? (strength * (4 + i) + 8) >> 4 : 0;
+}
+
+static AOM_INLINE void aom_cdef_find_dir(const uint16_t *in, cdef_list *dlist,
+ int var[CDEF_NBLOCKS][CDEF_NBLOCKS],
+ int cdef_count, int coeff_shift,
+ int dir[CDEF_NBLOCKS][CDEF_NBLOCKS]) {
+ int bi;
+
+ // Find direction of two 8x8 blocks together.
+ for (bi = 0; bi < cdef_count - 1; bi += 2) {
+ const int by = dlist[bi].by;
+ const int bx = dlist[bi].bx;
+ const int by2 = dlist[bi + 1].by;
+ const int bx2 = dlist[bi + 1].bx;
+ const int pos1 = 8 * by * CDEF_BSTRIDE + 8 * bx;
+ const int pos2 = 8 * by2 * CDEF_BSTRIDE + 8 * bx2;
+ cdef_find_dir_dual(&in[pos1], &in[pos2], CDEF_BSTRIDE, &var[by][bx],
+ &var[by2][bx2], coeff_shift, &dir[by][bx],
+ &dir[by2][bx2]);
+ }
+
+ // Process remaining 8x8 blocks here. One 8x8 at a time.
+ if (cdef_count % 2) {
+ const int by = dlist[bi].by;
+ const int bx = dlist[bi].bx;
+ dir[by][bx] = cdef_find_dir(&in[8 * by * CDEF_BSTRIDE + 8 * bx],
+ CDEF_BSTRIDE, &var[by][bx], coeff_shift);
+ }
+}
+
+void av1_cdef_filter_fb(uint8_t *dst8, uint16_t *dst16, int dstride,
+ const uint16_t *in, int xdec, int ydec,
+ int dir[CDEF_NBLOCKS][CDEF_NBLOCKS], int *dirinit,
+ int var[CDEF_NBLOCKS][CDEF_NBLOCKS], int pli,
+ cdef_list *dlist, int cdef_count, int level,
+ int sec_strength, int damping, int coeff_shift) {
+ int bi;
+ int bx;
+ int by;
+ const int pri_strength = level << coeff_shift;
+ sec_strength <<= coeff_shift;
+ damping += coeff_shift - (pli != AOM_PLANE_Y);
+ const int bw_log2 = 3 - xdec;
+ const int bh_log2 = 3 - ydec;
+ if (dirinit && pri_strength == 0 && sec_strength == 0) {
+ // If we're here, both primary and secondary strengths are 0, and
+ // we still haven't written anything to y[] yet, so we just copy
+ // the input to y[]. This is necessary only for av1_cdef_search()
+ // and only av1_cdef_search() sets dirinit.
+ for (bi = 0; bi < cdef_count; bi++) {
+ by = dlist[bi].by;
+ bx = dlist[bi].bx;
+ // TODO(stemidts/jmvalin): SIMD optimisations
+ for (int iy = 0; iy < 1 << bh_log2; iy++) {
+ memcpy(&dst16[(bi << (bw_log2 + bh_log2)) + (iy << bw_log2)],
+ &in[((by << bh_log2) + iy) * CDEF_BSTRIDE + (bx << bw_log2)],
+ ((size_t)1 << bw_log2) * sizeof(*dst16));
+ }
+ }
+ return;
+ }
+
+ if (pli == 0) {
+ if (!dirinit || !*dirinit) {
+ aom_cdef_find_dir(in, dlist, var, cdef_count, coeff_shift, dir);
+ if (dirinit) *dirinit = 1;
+ }
+ }
+ if (pli == 1 && xdec != ydec) {
+ for (bi = 0; bi < cdef_count; bi++) {
+ static const int conv422[8] = { 7, 0, 2, 4, 5, 6, 6, 6 };
+ static const int conv440[8] = { 1, 2, 2, 2, 3, 4, 6, 0 };
+ by = dlist[bi].by;
+ bx = dlist[bi].bx;
+ dir[by][bx] = (xdec ? conv422 : conv440)[dir[by][bx]];
+ }
+ }
+
+ if (dst8) {
+ const int block_width = 8 >> xdec;
+ const int block_height = 8 >> ydec;
+ /*
+ * strength_index == 0 : enable_primary = 1, enable_secondary = 1
+ * strength_index == 1 : enable_primary = 1, enable_secondary = 0
+ * strength_index == 2 : enable_primary = 0, enable_secondary = 1
+ * strength_index == 3 : enable_primary = 0, enable_secondary = 0
+ */
+ const cdef_filter_block_func cdef_filter_fn[4] = {
+ cdef_filter_8_0, cdef_filter_8_1, cdef_filter_8_2, cdef_filter_8_3
+ };
+
+ for (bi = 0; bi < cdef_count; bi++) {
+ by = dlist[bi].by;
+ bx = dlist[bi].bx;
+ const int t =
+ (pli ? pri_strength : adjust_strength(pri_strength, var[by][bx]));
+ const int strength_index = (sec_strength == 0) | ((t == 0) << 1);
+
+ cdef_filter_fn[strength_index](
+ &dst8[(by << bh_log2) * dstride + (bx << bw_log2)], dstride,
+ &in[(by * CDEF_BSTRIDE << bh_log2) + (bx << bw_log2)], t,
+ sec_strength, pri_strength ? dir[by][bx] : 0, damping, damping,
+ coeff_shift, block_width, block_height);
+ }
+ } else {
+ const int block_width = 8 >> xdec;
+ const int block_height = 8 >> ydec;
+ /*
+ * strength_index == 0 : enable_primary = 1, enable_secondary = 1
+ * strength_index == 1 : enable_primary = 1, enable_secondary = 0
+ * strength_index == 2 : enable_primary = 0, enable_secondary = 1
+ * strength_index == 3 : enable_primary = 0, enable_secondary = 0
+ */
+ const cdef_filter_block_func cdef_filter_fn[4] = {
+ cdef_filter_16_0, cdef_filter_16_1, cdef_filter_16_2, cdef_filter_16_3
+ };
+
+ for (bi = 0; bi < cdef_count; bi++) {
+ by = dlist[bi].by;
+ bx = dlist[bi].bx;
+ const int t =
+ (pli ? pri_strength : adjust_strength(pri_strength, var[by][bx]));
+ const int strength_index = (sec_strength == 0) | ((t == 0) << 1);
+
+ cdef_filter_fn[strength_index](
+ &dst16[dirinit ? bi << (bw_log2 + bh_log2)
+ : (by << bh_log2) * dstride + (bx << bw_log2)],
+ dirinit ? 1 << bw_log2 : dstride,
+ &in[(by * CDEF_BSTRIDE << bh_log2) + (bx << bw_log2)], t,
+ sec_strength, pri_strength ? dir[by][bx] : 0, damping, damping,
+ coeff_shift, block_width, block_height);
+ }
+ }
+}
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