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, 390 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/od_dering_simd.h b/third_party/aom/av1/common/od_dering_simd.h
new file mode 100644
index 000000000..4074e7e50
--- /dev/null
+++ b/third_party/aom/av1/common/od_dering_simd.h
@@ -0,0 +1,390 @@
+/*
+ * 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 "./av1_rtcd.h"
+#include "./cdef_simd.h"
+#include "./od_dering.h"
+
+/* partial A is a 16-bit vector of the form:
+   [x8 x7 x6 x5 x4 x3 x2 x1] and partial B has the form:
+   [0  y1 y2 y3 y4 y5 y6 y7].
+   This function computes (x1^2+y1^2)*C1 + (x2^2+y2^2)*C2 + ...
+   (x7^2+y2^7)*C7 + (x8^2+0^2)*C8 where the C1..C8 constants are in const1
+   and const2. */
+static INLINE v128 fold_mul_and_sum(v128 partiala, v128 partialb, v128 const1,
+                                    v128 const2) {
+  v128 tmp;
+  /* Reverse partial B. */
+  partialb = v128_shuffle_8(
+      partialb, v128_from_32(0x0f0e0100, 0x03020504, 0x07060908, 0x0b0a0d0c));
+  /* Interleave the x and y values of identical indices and pair x8 with 0. */
+  tmp = partiala;
+  partiala = v128_ziplo_16(partialb, partiala);
+  partialb = v128_ziphi_16(partialb, tmp);
+  /* Square and add the corresponding x and y values. */
+  partiala = v128_madd_s16(partiala, partiala);
+  partialb = v128_madd_s16(partialb, partialb);
+  /* Multiply by constant. */
+  partiala = v128_mullo_s32(partiala, const1);
+  partialb = v128_mullo_s32(partialb, const2);
+  /* Sum all results. */
+  partiala = v128_add_32(partiala, partialb);
+  return partiala;
+}
+
+static INLINE v128 hsum4(v128 x0, v128 x1, v128 x2, v128 x3) {
+  v128 t0, t1, t2, t3;
+  t0 = v128_ziplo_32(x1, x0);
+  t1 = v128_ziplo_32(x3, x2);
+  t2 = v128_ziphi_32(x1, x0);
+  t3 = v128_ziphi_32(x3, x2);
+  x0 = v128_ziplo_64(t1, t0);
+  x1 = v128_ziphi_64(t1, t0);
+  x2 = v128_ziplo_64(t3, t2);
+  x3 = v128_ziphi_64(t3, t2);
+  return v128_add_32(v128_add_32(x0, x1), v128_add_32(x2, x3));
+}
+
+/* Computes cost for directions 0, 5, 6 and 7. We can call this function again
+   to compute the remaining directions. */
+static INLINE v128 compute_directions(v128 lines[8], int32_t tmp_cost1[4]) {
+  v128 partial4a, partial4b, partial5a, partial5b, partial7a, partial7b;
+  v128 partial6;
+  v128 tmp;
+  /* Partial sums for lines 0 and 1. */
+  partial4a = v128_shl_n_byte(lines[0], 14);
+  partial4b = v128_shr_n_byte(lines[0], 2);
+  partial4a = v128_add_16(partial4a, v128_shl_n_byte(lines[1], 12));
+  partial4b = v128_add_16(partial4b, v128_shr_n_byte(lines[1], 4));
+  tmp = v128_add_16(lines[0], lines[1]);
+  partial5a = v128_shl_n_byte(tmp, 10);
+  partial5b = v128_shr_n_byte(tmp, 6);
+  partial7a = v128_shl_n_byte(tmp, 4);
+  partial7b = v128_shr_n_byte(tmp, 12);
+  partial6 = tmp;
+
+  /* Partial sums for lines 2 and 3. */
+  partial4a = v128_add_16(partial4a, v128_shl_n_byte(lines[2], 10));
+  partial4b = v128_add_16(partial4b, v128_shr_n_byte(lines[2], 6));
+  partial4a = v128_add_16(partial4a, v128_shl_n_byte(lines[3], 8));
+  partial4b = v128_add_16(partial4b, v128_shr_n_byte(lines[3], 8));
+  tmp = v128_add_16(lines[2], lines[3]);
+  partial5a = v128_add_16(partial5a, v128_shl_n_byte(tmp, 8));
+  partial5b = v128_add_16(partial5b, v128_shr_n_byte(tmp, 8));
+  partial7a = v128_add_16(partial7a, v128_shl_n_byte(tmp, 6));
+  partial7b = v128_add_16(partial7b, v128_shr_n_byte(tmp, 10));
+  partial6 = v128_add_16(partial6, tmp);
+
+  /* Partial sums for lines 4 and 5. */
+  partial4a = v128_add_16(partial4a, v128_shl_n_byte(lines[4], 6));
+  partial4b = v128_add_16(partial4b, v128_shr_n_byte(lines[4], 10));
+  partial4a = v128_add_16(partial4a, v128_shl_n_byte(lines[5], 4));
+  partial4b = v128_add_16(partial4b, v128_shr_n_byte(lines[5], 12));
+  tmp = v128_add_16(lines[4], lines[5]);
+  partial5a = v128_add_16(partial5a, v128_shl_n_byte(tmp, 6));
+  partial5b = v128_add_16(partial5b, v128_shr_n_byte(tmp, 10));
+  partial7a = v128_add_16(partial7a, v128_shl_n_byte(tmp, 8));
+  partial7b = v128_add_16(partial7b, v128_shr_n_byte(tmp, 8));
+  partial6 = v128_add_16(partial6, tmp);
+
+  /* Partial sums for lines 6 and 7. */
+  partial4a = v128_add_16(partial4a, v128_shl_n_byte(lines[6], 2));
+  partial4b = v128_add_16(partial4b, v128_shr_n_byte(lines[6], 14));
+  partial4a = v128_add_16(partial4a, lines[7]);
+  tmp = v128_add_16(lines[6], lines[7]);
+  partial5a = v128_add_16(partial5a, v128_shl_n_byte(tmp, 4));
+  partial5b = v128_add_16(partial5b, v128_shr_n_byte(tmp, 12));
+  partial7a = v128_add_16(partial7a, v128_shl_n_byte(tmp, 10));
+  partial7b = v128_add_16(partial7b, v128_shr_n_byte(tmp, 6));
+  partial6 = v128_add_16(partial6, tmp);
+
+  /* Compute costs in terms of partial sums. */
+  partial4a =
+      fold_mul_and_sum(partial4a, partial4b, v128_from_32(210, 280, 420, 840),
+                       v128_from_32(105, 120, 140, 168));
+  partial7a =
+      fold_mul_and_sum(partial7a, partial7b, v128_from_32(210, 420, 0, 0),
+                       v128_from_32(105, 105, 105, 140));
+  partial5a =
+      fold_mul_and_sum(partial5a, partial5b, v128_from_32(210, 420, 0, 0),
+                       v128_from_32(105, 105, 105, 140));
+  partial6 = v128_madd_s16(partial6, partial6);
+  partial6 = v128_mullo_s32(partial6, v128_dup_32(105));
+
+  partial4a = hsum4(partial4a, partial5a, partial6, partial7a);
+  v128_store_unaligned(tmp_cost1, partial4a);
+  return partial4a;
+}
+
+/* transpose and reverse the order of the lines -- equivalent to a 90-degree
+   counter-clockwise rotation of the pixels. */
+static INLINE void array_reverse_transpose_8x8(v128 *in, v128 *res) {
+  const v128 tr0_0 = v128_ziplo_16(in[1], in[0]);
+  const v128 tr0_1 = v128_ziplo_16(in[3], in[2]);
+  const v128 tr0_2 = v128_ziphi_16(in[1], in[0]);
+  const v128 tr0_3 = v128_ziphi_16(in[3], in[2]);
+  const v128 tr0_4 = v128_ziplo_16(in[5], in[4]);
+  const v128 tr0_5 = v128_ziplo_16(in[7], in[6]);
+  const v128 tr0_6 = v128_ziphi_16(in[5], in[4]);
+  const v128 tr0_7 = v128_ziphi_16(in[7], in[6]);
+
+  const v128 tr1_0 = v128_ziplo_32(tr0_1, tr0_0);
+  const v128 tr1_1 = v128_ziplo_32(tr0_5, tr0_4);
+  const v128 tr1_2 = v128_ziphi_32(tr0_1, tr0_0);
+  const v128 tr1_3 = v128_ziphi_32(tr0_5, tr0_4);
+  const v128 tr1_4 = v128_ziplo_32(tr0_3, tr0_2);
+  const v128 tr1_5 = v128_ziplo_32(tr0_7, tr0_6);
+  const v128 tr1_6 = v128_ziphi_32(tr0_3, tr0_2);
+  const v128 tr1_7 = v128_ziphi_32(tr0_7, tr0_6);
+
+  res[7] = v128_ziplo_64(tr1_1, tr1_0);
+  res[6] = v128_ziphi_64(tr1_1, tr1_0);
+  res[5] = v128_ziplo_64(tr1_3, tr1_2);
+  res[4] = v128_ziphi_64(tr1_3, tr1_2);
+  res[3] = v128_ziplo_64(tr1_5, tr1_4);
+  res[2] = v128_ziphi_64(tr1_5, tr1_4);
+  res[1] = v128_ziplo_64(tr1_7, tr1_6);
+  res[0] = v128_ziphi_64(tr1_7, tr1_6);
+}
+
+int SIMD_FUNC(od_dir_find8)(const od_dering_in *img, int stride, int32_t *var,
+                            int coeff_shift) {
+  int i;
+  int32_t cost[8];
+  int32_t best_cost = 0;
+  int best_dir = 0;
+  v128 lines[8];
+  for (i = 0; i < 8; i++) {
+    lines[i] = v128_load_unaligned(&img[i * stride]);
+    lines[i] =
+        v128_sub_16(v128_shr_s16(lines[i], coeff_shift), v128_dup_16(128));
+  }
+
+#if defined(__SSE4_1__)
+  /* Compute "mostly vertical" directions. */
+  __m128i dir47 = compute_directions(lines, cost + 4);
+
+  array_reverse_transpose_8x8(lines, lines);
+
+  /* Compute "mostly horizontal" directions. */
+  __m128i dir03 = compute_directions(lines, cost);
+
+  __m128i max = _mm_max_epi32(dir03, dir47);
+  max = _mm_max_epi32(max, _mm_shuffle_epi32(max, _MM_SHUFFLE(1, 0, 3, 2)));
+  max = _mm_max_epi32(max, _mm_shuffle_epi32(max, _MM_SHUFFLE(2, 3, 0, 1)));
+  best_cost = _mm_cvtsi128_si32(max);
+  __m128i t =
+      _mm_packs_epi32(_mm_cmpeq_epi32(max, dir03), _mm_cmpeq_epi32(max, dir47));
+  best_dir = _mm_movemask_epi8(_mm_packs_epi16(t, t));
+  best_dir = get_msb(best_dir ^ (best_dir - 1));  // Count trailing zeros
+#else
+  /* Compute "mostly vertical" directions. */
+  compute_directions(lines, cost + 4);
+
+  array_reverse_transpose_8x8(lines, lines);
+
+  /* Compute "mostly horizontal" directions. */
+  compute_directions(lines, cost);
+
+  for (i = 0; i < 8; i++) {
+    if (cost[i] > best_cost) {
+      best_cost = cost[i];
+      best_dir = i;
+    }
+  }
+#endif
+
+  /* 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 SIMD_FUNC(od_filter_dering_direction_4x4)(uint16_t *y, int ystride,
+                                               const uint16_t *in,
+                                               int threshold, int dir,
+                                               int damping) {
+  int i;
+  v128 p0, p1, sum, row, res;
+  int o1 = OD_DIRECTION_OFFSETS_TABLE[dir][0];
+  int o2 = OD_DIRECTION_OFFSETS_TABLE[dir][1];
+
+  if (threshold) damping -= get_msb(threshold);
+  for (i = 0; i < 4; i += 2) {
+    sum = v128_zero();
+    row = v128_from_v64(v64_load_aligned(&in[i * OD_FILT_BSTRIDE]),
+                        v64_load_aligned(&in[(i + 1) * OD_FILT_BSTRIDE]));
+
+    // p0 = constrain16(in[i*OD_FILT_BSTRIDE + offset], row, threshold, damping)
+    p0 = v128_from_v64(v64_load_unaligned(&in[i * OD_FILT_BSTRIDE + o1]),
+                       v64_load_unaligned(&in[(i + 1) * OD_FILT_BSTRIDE + o1]));
+    p0 = constrain16(p0, row, threshold, damping);
+
+    // p1 = constrain16(in[i*OD_FILT_BSTRIDE - offset], row, threshold, damping)
+    p1 = v128_from_v64(v64_load_unaligned(&in[i * OD_FILT_BSTRIDE - o1]),
+                       v64_load_unaligned(&in[(i + 1) * OD_FILT_BSTRIDE - o1]));
+    p1 = constrain16(p1, row, threshold, damping);
+
+    // sum += 4 * (p0 + p1)
+    sum = v128_add_16(sum, v128_shl_n_16(v128_add_16(p0, p1), 2));
+
+    // p0 = constrain16(in[i*OD_FILT_BSTRIDE + offset], row, threshold, damping)
+    p0 = v128_from_v64(v64_load_unaligned(&in[i * OD_FILT_BSTRIDE + o2]),
+                       v64_load_unaligned(&in[(i + 1) * OD_FILT_BSTRIDE + o2]));
+    p0 = constrain16(p0, row, threshold, damping);
+
+    // p1 = constrain16(in[i*OD_FILT_BSTRIDE - offset], row, threshold, damping)
+    p1 = v128_from_v64(v64_load_unaligned(&in[i * OD_FILT_BSTRIDE - o2]),
+                       v64_load_unaligned(&in[(i + 1) * OD_FILT_BSTRIDE - o2]));
+    p1 = constrain16(p1, row, threshold, damping);
+
+    // sum += 1 * (p0 + p1)
+    sum = v128_add_16(sum, v128_add_16(p0, p1));
+
+    // res = row + ((sum + 8) >> 4)
+    res = v128_add_16(sum, v128_dup_16(8));
+    res = v128_shr_n_s16(res, 4);
+    res = v128_add_16(row, res);
+    v64_store_aligned(&y[i * ystride], v128_high_v64(res));
+    v64_store_aligned(&y[(i + 1) * ystride], v128_low_v64(res));
+  }
+}
+
+void SIMD_FUNC(od_filter_dering_direction_8x8)(uint16_t *y, int ystride,
+                                               const uint16_t *in,
+                                               int threshold, int dir,
+                                               int damping) {
+  int i;
+  v128 sum, p0, p1, row, res;
+  int o1 = OD_DIRECTION_OFFSETS_TABLE[dir][0];
+  int o2 = OD_DIRECTION_OFFSETS_TABLE[dir][1];
+  int o3 = OD_DIRECTION_OFFSETS_TABLE[dir][2];
+
+  if (threshold) damping -= get_msb(threshold);
+  for (i = 0; i < 8; i++) {
+    sum = v128_zero();
+    row = v128_load_aligned(&in[i * OD_FILT_BSTRIDE]);
+
+    // p0 = constrain16(in[i*OD_FILT_BSTRIDE + offset], row, threshold, damping)
+    p0 = v128_load_unaligned(&in[i * OD_FILT_BSTRIDE + o1]);
+    p0 = constrain16(p0, row, threshold, damping);
+
+    // p1 = constrain16(in[i*OD_FILT_BSTRIDE - offset], row, threshold, damping)
+    p1 = v128_load_unaligned(&in[i * OD_FILT_BSTRIDE - o1]);
+    p1 = constrain16(p1, row, threshold, damping);
+
+    // sum += 3 * (p0 + p1)
+    p0 = v128_add_16(p0, p1);
+    p0 = v128_add_16(p0, v128_shl_n_16(p0, 1));
+    sum = v128_add_16(sum, p0);
+
+    // p0 = constrain16(in[i*OD_FILT_BSTRIDE + offset], row, threshold, damping)
+    p0 = v128_load_unaligned(&in[i * OD_FILT_BSTRIDE + o2]);
+    p0 = constrain16(p0, row, threshold, damping);
+
+    // p1 = constrain16(in[i*OD_FILT_BSTRIDE - offset], row, threshold, damping)
+    p1 = v128_load_unaligned(&in[i * OD_FILT_BSTRIDE - o2]);
+    p1 = constrain16(p1, row, threshold, damping);
+
+    // sum += 2 * (p0 + p1)
+    p0 = v128_shl_n_16(v128_add_16(p0, p1), 1);
+    sum = v128_add_16(sum, p0);
+
+    // p0 = constrain16(in[i*OD_FILT_BSTRIDE + offset], row, threshold, damping)
+    p0 = v128_load_unaligned(&in[i * OD_FILT_BSTRIDE + o3]);
+    p0 = constrain16(p0, row, threshold, damping);
+
+    // p1 = constrain16(in[i*OD_FILT_BSTRIDE - offset], row, threshold, damping)
+    p1 = v128_load_unaligned(&in[i * OD_FILT_BSTRIDE - o3]);
+    p1 = constrain16(p1, row, threshold, damping);
+
+    // sum += (p0 + p1)
+    p0 = v128_add_16(p0, p1);
+    sum = v128_add_16(sum, p0);
+
+    // res = row + ((sum + 8) >> 4)
+    res = v128_add_16(sum, v128_dup_16(8));
+    res = v128_shr_n_s16(res, 4);
+    res = v128_add_16(row, res);
+    v128_store_unaligned(&y[i * ystride], res);
+  }
+}
+
+void SIMD_FUNC(copy_8x8_16bit_to_8bit)(uint8_t *dst, int dstride,
+                                       const uint16_t *src, int sstride) {
+  int i;
+  for (i = 0; i < 8; i++) {
+    v128 row = v128_load_unaligned(&src[i * sstride]);
+    row = v128_pack_s16_u8(row, row);
+    v64_store_unaligned(&dst[i * dstride], v128_low_v64(row));
+  }
+}
+
+void SIMD_FUNC(copy_4x4_16bit_to_8bit)(uint8_t *dst, int dstride,
+                                       const uint16_t *src, int sstride) {
+  int i;
+  for (i = 0; i < 4; i++) {
+    v128 row = v128_load_unaligned(&src[i * sstride]);
+    row = v128_pack_s16_u8(row, row);
+    u32_store_unaligned(&dst[i * dstride], v128_low_u32(row));
+  }
+}
+
+void SIMD_FUNC(copy_8x8_16bit_to_16bit)(uint16_t *dst, int dstride,
+                                        const uint16_t *src, int sstride) {
+  int i;
+  for (i = 0; i < 8; i++) {
+    v128 row = v128_load_unaligned(&src[i * sstride]);
+    v128_store_unaligned(&dst[i * dstride], row);
+  }
+}
+
+void SIMD_FUNC(copy_4x4_16bit_to_16bit)(uint16_t *dst, int dstride,
+                                        const uint16_t *src, int sstride) {
+  int i;
+  for (i = 0; i < 4; i++) {
+    v64 row = v64_load_unaligned(&src[i * sstride]);
+    v64_store_unaligned(&dst[i * dstride], row);
+  }
+}
+
+void SIMD_FUNC(copy_rect8_8bit_to_16bit)(uint16_t *dst, int dstride,
+                                         const uint8_t *src, int sstride, int v,
+                                         int h) {
+  int i, j;
+  for (i = 0; i < v; i++) {
+    for (j = 0; j < (h & ~0x7); j += 8) {
+      v64 row = v64_load_unaligned(&src[i * sstride + j]);
+      v128_store_unaligned(&dst[i * dstride + j], v128_unpack_u8_s16(row));
+    }
+    for (; j < h; j++) {
+      dst[i * dstride + j] = src[i * sstride + j];
+    }
+  }
+}
+
+void SIMD_FUNC(copy_rect8_16bit_to_16bit)(uint16_t *dst, int dstride,
+                                          const uint16_t *src, int sstride,
+                                          int v, int h) {
+  int i, j;
+  for (i = 0; i < v; i++) {
+    for (j = 0; j < (h & ~0x7); j += 8) {
+      v128 row = v128_load_unaligned(&src[i * sstride + j]);
+      v128_store_unaligned(&dst[i * dstride + j], row);
+    }
+    for (; j < h; j++) {
+      dst[i * dstride + j] = src[i * sstride + j];
+    }
+  }
+}