1 files changed, 81 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/arm/subpel_variance_media.c b/third_party/aom/aom_dsp/arm/subpel_variance_media.c
new file mode 100644
index 000000000..46ec028d3
--- /dev/null
+++ b/third_party/aom/aom_dsp/arm/subpel_variance_media.c
@@ -0,0 +1,81 @@
+/*
+ * 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 "./aom_config.h"
+#include "./aom_dsp_rtcd.h"
+#include "aom/aom_integer.h"
+#include "aom_ports/mem.h"
+
+#if HAVE_MEDIA
+static const int16_t bilinear_filters_media[8][2] = { { 128, 0 }, { 112, 16 },
+                                                      { 96, 32 }, { 80, 48 },
+                                                      { 64, 64 }, { 48, 80 },
+                                                      { 32, 96 }, { 16, 112 } };
+
+extern void aom_filter_block2d_bil_first_pass_media(
+    const uint8_t *src_ptr, uint16_t *dst_ptr, uint32_t src_pitch,
+    uint32_t height, uint32_t width, const int16_t *filter);
+
+extern void aom_filter_block2d_bil_second_pass_media(
+    const uint16_t *src_ptr, uint8_t *dst_ptr, int32_t src_pitch,
+    uint32_t height, uint32_t width, const int16_t *filter);
+
+unsigned int aom_sub_pixel_variance8x8_media(
+    const uint8_t *src_ptr, int src_pixels_per_line, int xoffset, int yoffset,
+    const uint8_t *dst_ptr, int dst_pixels_per_line, unsigned int *sse) {
+  uint16_t first_pass[10 * 8];
+  uint8_t second_pass[8 * 8];
+  const int16_t *HFilter, *VFilter;
+
+  HFilter = bilinear_filters_media[xoffset];
+  VFilter = bilinear_filters_media[yoffset];
+
+  aom_filter_block2d_bil_first_pass_media(src_ptr, first_pass,
+                                          src_pixels_per_line, 9, 8, HFilter);
+  aom_filter_block2d_bil_second_pass_media(first_pass, second_pass, 8, 8, 8,
+                                           VFilter);
+
+  return aom_variance8x8_media(second_pass, 8, dst_ptr, dst_pixels_per_line,
+                               sse);
+}
+
+unsigned int aom_sub_pixel_variance16x16_media(
+    const uint8_t *src_ptr, int src_pixels_per_line, int xoffset, int yoffset,
+    const uint8_t *dst_ptr, int dst_pixels_per_line, unsigned int *sse) {
+  uint16_t first_pass[36 * 16];
+  uint8_t second_pass[20 * 16];
+  const int16_t *HFilter, *VFilter;
+  unsigned int var;
+
+  if (xoffset == 4 && yoffset == 0) {
+    var = aom_variance_halfpixvar16x16_h_media(
+        src_ptr, src_pixels_per_line, dst_ptr, dst_pixels_per_line, sse);
+  } else if (xoffset == 0 && yoffset == 4) {
+    var = aom_variance_halfpixvar16x16_v_media(
+        src_ptr, src_pixels_per_line, dst_ptr, dst_pixels_per_line, sse);
+  } else if (xoffset == 4 && yoffset == 4) {
+    var = aom_variance_halfpixvar16x16_hv_media(
+        src_ptr, src_pixels_per_line, dst_ptr, dst_pixels_per_line, sse);
+  } else {
+    HFilter = bilinear_filters_media[xoffset];
+    VFilter = bilinear_filters_media[yoffset];
+
+    aom_filter_block2d_bil_first_pass_media(
+        src_ptr, first_pass, src_pixels_per_line, 17, 16, HFilter);
+    aom_filter_block2d_bil_second_pass_media(first_pass, second_pass, 16, 16,
+                                             16, VFilter);
+
+    var = aom_variance16x16_media(second_pass, 16, dst_ptr, dst_pixels_per_line,
+                                  sse);
+  }
+  return var;
+}
+#endif  // HAVE_MEDIA