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, 192 insertions, 0 deletions

diff --git a/third_party/aom/aom_dsp/x86/variance_avx2.c b/third_party/aom/aom_dsp/x86/variance_avx2.c
new file mode 100644
index 000000000..18a70dffe
--- /dev/null
+++ b/third_party/aom/aom_dsp/x86/variance_avx2.c
@@ -0,0 +1,192 @@
+/*
+ * 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 <immintrin.h>
+#include "./aom_dsp_rtcd.h"
+
+typedef void (*get_var_avx2)(const uint8_t *src, int src_stride,
+                             const uint8_t *ref, int ref_stride,
+                             unsigned int *sse, int *sum);
+
+void aom_get32x32var_avx2(const uint8_t *src, int src_stride,
+                          const uint8_t *ref, int ref_stride, unsigned int *sse,
+                          int *sum);
+
+static void variance_avx2(const uint8_t *src, int src_stride,
+                          const uint8_t *ref, int ref_stride, int w, int h,
+                          unsigned int *sse, int *sum, get_var_avx2 var_fn,
+                          int block_size) {
+  int i, j;
+
+  *sse = 0;
+  *sum = 0;
+
+  for (i = 0; i < h; i += 16) {
+    for (j = 0; j < w; j += block_size) {
+      unsigned int sse0;
+      int sum0;
+      var_fn(&src[src_stride * i + j], src_stride, &ref[ref_stride * i + j],
+             ref_stride, &sse0, &sum0);
+      *sse += sse0;
+      *sum += sum0;
+    }
+  }
+}
+
+unsigned int aom_variance16x16_avx2(const uint8_t *src, int src_stride,
+                                    const uint8_t *ref, int ref_stride,
+                                    unsigned int *sse) {
+  int sum;
+  unsigned int variance;
+  variance_avx2(src, src_stride, ref, ref_stride, 16, 16, sse, &sum,
+                aom_get16x16var_avx2, 16);
+
+  variance = *sse - (((uint32_t)((int64_t)sum * sum)) >> 8);
+  _mm256_zeroupper();
+  return variance;
+}
+
+unsigned int aom_mse16x16_avx2(const uint8_t *src, int src_stride,
+                               const uint8_t *ref, int ref_stride,
+                               unsigned int *sse) {
+  int sum;
+  aom_get16x16var_avx2(src, src_stride, ref, ref_stride, sse, &sum);
+  _mm256_zeroupper();
+  return *sse;
+}
+
+unsigned int aom_variance32x16_avx2(const uint8_t *src, int src_stride,
+                                    const uint8_t *ref, int ref_stride,
+                                    unsigned int *sse) {
+  int sum;
+  unsigned int variance;
+  variance_avx2(src, src_stride, ref, ref_stride, 32, 16, sse, &sum,
+                aom_get32x32var_avx2, 32);
+
+  variance = *sse - (uint32_t)(((int64_t)sum * sum) >> 9);
+  _mm256_zeroupper();
+  return variance;
+}
+
+unsigned int aom_variance32x32_avx2(const uint8_t *src, int src_stride,
+                                    const uint8_t *ref, int ref_stride,
+                                    unsigned int *sse) {
+  int sum;
+  unsigned int variance;
+  variance_avx2(src, src_stride, ref, ref_stride, 32, 32, sse, &sum,
+                aom_get32x32var_avx2, 32);
+
+  variance = *sse - (uint32_t)(((int64_t)sum * sum) >> 10);
+  _mm256_zeroupper();
+  return variance;
+}
+
+unsigned int aom_variance64x64_avx2(const uint8_t *src, int src_stride,
+                                    const uint8_t *ref, int ref_stride,
+                                    unsigned int *sse) {
+  int sum;
+  unsigned int variance;
+  variance_avx2(src, src_stride, ref, ref_stride, 64, 64, sse, &sum,
+                aom_get32x32var_avx2, 32);
+
+  variance = *sse - (uint32_t)(((int64_t)sum * sum) >> 12);
+  _mm256_zeroupper();
+  return variance;
+}
+
+unsigned int aom_variance64x32_avx2(const uint8_t *src, int src_stride,
+                                    const uint8_t *ref, int ref_stride,
+                                    unsigned int *sse) {
+  int sum;
+  unsigned int variance;
+  variance_avx2(src, src_stride, ref, ref_stride, 64, 32, sse, &sum,
+                aom_get32x32var_avx2, 32);
+
+  variance = *sse - (uint32_t)(((int64_t)sum * sum) >> 11);
+  _mm256_zeroupper();
+  return variance;
+}
+
+unsigned int aom_sub_pixel_variance32xh_avx2(const uint8_t *src, int src_stride,
+                                             int x_offset, int y_offset,
+                                             const uint8_t *dst, int dst_stride,
+                                             int height, unsigned int *sse);
+
+unsigned int aom_sub_pixel_avg_variance32xh_avx2(
+    const uint8_t *src, int src_stride, int x_offset, int y_offset,
+    const uint8_t *dst, int dst_stride, const uint8_t *sec, int sec_stride,
+    int height, unsigned int *sseptr);
+
+unsigned int aom_sub_pixel_variance64x64_avx2(const uint8_t *src,
+                                              int src_stride, int x_offset,
+                                              int y_offset, const uint8_t *dst,
+                                              int dst_stride,
+                                              unsigned int *sse) {
+  unsigned int sse1;
+  const int se1 = aom_sub_pixel_variance32xh_avx2(
+      src, src_stride, x_offset, y_offset, dst, dst_stride, 64, &sse1);
+  unsigned int sse2;
+  const int se2 =
+      aom_sub_pixel_variance32xh_avx2(src + 32, src_stride, x_offset, y_offset,
+                                      dst + 32, dst_stride, 64, &sse2);
+  const int se = se1 + se2;
+  unsigned int variance;
+  *sse = sse1 + sse2;
+
+  variance = *sse - (uint32_t)(((int64_t)se * se) >> 12);
+  _mm256_zeroupper();
+  return variance;
+}
+
+unsigned int aom_sub_pixel_variance32x32_avx2(const uint8_t *src,
+                                              int src_stride, int x_offset,
+                                              int y_offset, const uint8_t *dst,
+                                              int dst_stride,
+                                              unsigned int *sse) {
+  const int se = aom_sub_pixel_variance32xh_avx2(
+      src, src_stride, x_offset, y_offset, dst, dst_stride, 32, sse);
+
+  const unsigned int variance = *sse - (uint32_t)(((int64_t)se * se) >> 10);
+  _mm256_zeroupper();
+  return variance;
+}
+
+unsigned int aom_sub_pixel_avg_variance64x64_avx2(
+    const uint8_t *src, int src_stride, int x_offset, int y_offset,
+    const uint8_t *dst, int dst_stride, unsigned int *sse, const uint8_t *sec) {
+  unsigned int sse1;
+  const int se1 = aom_sub_pixel_avg_variance32xh_avx2(
+      src, src_stride, x_offset, y_offset, dst, dst_stride, sec, 64, 64, &sse1);
+  unsigned int sse2;
+  const int se2 = aom_sub_pixel_avg_variance32xh_avx2(
+      src + 32, src_stride, x_offset, y_offset, dst + 32, dst_stride, sec + 32,
+      64, 64, &sse2);
+  const int se = se1 + se2;
+  unsigned int variance;
+
+  *sse = sse1 + sse2;
+
+  variance = *sse - (uint32_t)(((int64_t)se * se) >> 12);
+  _mm256_zeroupper();
+  return variance;
+}
+
+unsigned int aom_sub_pixel_avg_variance32x32_avx2(
+    const uint8_t *src, int src_stride, int x_offset, int y_offset,
+    const uint8_t *dst, int dst_stride, unsigned int *sse, const uint8_t *sec) {
+  // Process 32 elements in parallel.
+  const int se = aom_sub_pixel_avg_variance32xh_avx2(
+      src, src_stride, x_offset, y_offset, dst, dst_stride, sec, 32, 32, sse);
+
+  const unsigned int variance = *sse - (uint32_t)(((int64_t)se * se) >> 10);
+  _mm256_zeroupper();
+  return variance;
+}