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, 139 insertions, 0 deletions

diff --git a/third_party/aom/aom_scale/mips/dspr2/yv12extend_dspr2.c b/third_party/aom/aom_scale/mips/dspr2/yv12extend_dspr2.c
new file mode 100644
index 000000000..51192f7b9
--- /dev/null
+++ b/third_party/aom/aom_scale/mips/dspr2/yv12extend_dspr2.c
@@ -0,0 +1,139 @@
+/*
+ * 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 "./aom_config.h"
+#include "aom_scale/yv12config.h"
+#include "aom_mem/aom_mem.h"
+#include "aom_scale/aom_scale.h"
+
+#if HAVE_DSPR2
+static void extend_plane(uint8_t *const src, int src_stride, int width,
+                         int height, int extend_top, int extend_left,
+                         int extend_bottom, int extend_right) {
+  int i, j;
+  uint8_t *left_src, *right_src;
+  uint8_t *left_dst_start, *right_dst_start;
+  uint8_t *left_dst, *right_dst;
+  uint8_t *top_src, *bot_src;
+  uint8_t *top_dst, *bot_dst;
+  uint32_t left_pix;
+  uint32_t right_pix;
+  uint32_t linesize;
+
+  /* copy the left and right most columns out */
+  left_src = src;
+  right_src = src + width - 1;
+  left_dst_start = src - extend_left;
+  right_dst_start = src + width;
+
+  for (i = height; i--;) {
+    left_dst = left_dst_start;
+    right_dst = right_dst_start;
+
+    __asm__ __volatile__(
+        "lb        %[left_pix],     0(%[left_src])      \n\t"
+        "lb        %[right_pix],    0(%[right_src])     \n\t"
+        "replv.qb  %[left_pix],     %[left_pix]         \n\t"
+        "replv.qb  %[right_pix],    %[right_pix]        \n\t"
+
+        : [left_pix] "=&r"(left_pix), [right_pix] "=&r"(right_pix)
+        : [left_src] "r"(left_src), [right_src] "r"(right_src));
+
+    for (j = extend_left / 4; j--;) {
+      __asm__ __volatile__(
+          "sw     %[left_pix],    0(%[left_dst])     \n\t"
+          "sw     %[right_pix],   0(%[right_dst])    \n\t"
+
+          :
+          : [left_dst] "r"(left_dst), [left_pix] "r"(left_pix),
+            [right_dst] "r"(right_dst), [right_pix] "r"(right_pix));
+
+      left_dst += 4;
+      right_dst += 4;
+    }
+
+    for (j = extend_left % 4; j--;) {
+      __asm__ __volatile__(
+          "sb     %[left_pix],    0(%[left_dst])     \n\t"
+          "sb     %[right_pix],   0(%[right_dst])     \n\t"
+
+          :
+          : [left_dst] "r"(left_dst), [left_pix] "r"(left_pix),
+            [right_dst] "r"(right_dst), [right_pix] "r"(right_pix));
+
+      left_dst += 1;
+      right_dst += 1;
+    }
+
+    left_src += src_stride;
+    right_src += src_stride;
+    left_dst_start += src_stride;
+    right_dst_start += src_stride;
+  }
+
+  /* Now copy the top and bottom lines into each line of the respective
+   * borders
+   */
+  top_src = src - extend_left;
+  bot_src = src + src_stride * (height - 1) - extend_left;
+  top_dst = src + src_stride * (-extend_top) - extend_left;
+  bot_dst = src + src_stride * (height)-extend_left;
+  linesize = extend_left + extend_right + width;
+
+  for (i = 0; i < extend_top; i++) {
+    memcpy(top_dst, top_src, linesize);
+    top_dst += src_stride;
+  }
+
+  for (i = 0; i < extend_bottom; i++) {
+    memcpy(bot_dst, bot_src, linesize);
+    bot_dst += src_stride;
+  }
+}
+
+static void extend_frame(YV12_BUFFER_CONFIG *const ybf, int ext_size) {
+  const int c_w = ybf->uv_crop_width;
+  const int c_h = ybf->uv_crop_height;
+  const int ss_x = ybf->uv_width < ybf->y_width;
+  const int ss_y = ybf->uv_height < ybf->y_height;
+  const int c_et = ext_size >> ss_y;
+  const int c_el = ext_size >> ss_x;
+  const int c_eb = c_et + ybf->uv_height - ybf->uv_crop_height;
+  const int c_er = c_el + ybf->uv_width - ybf->uv_crop_width;
+
+  assert(ybf->y_height - ybf->y_crop_height < 16);
+  assert(ybf->y_width - ybf->y_crop_width < 16);
+  assert(ybf->y_height - ybf->y_crop_height >= 0);
+  assert(ybf->y_width - ybf->y_crop_width >= 0);
+
+  extend_plane(ybf->y_buffer, ybf->y_stride, ybf->y_crop_width,
+               ybf->y_crop_height, ext_size, ext_size,
+               ext_size + ybf->y_height - ybf->y_crop_height,
+               ext_size + ybf->y_width - ybf->y_crop_width);
+
+  extend_plane(ybf->u_buffer, ybf->uv_stride, c_w, c_h, c_et, c_el, c_eb, c_er);
+
+  extend_plane(ybf->v_buffer, ybf->uv_stride, c_w, c_h, c_et, c_el, c_eb, c_er);
+}
+
+void aom_extend_frame_borders_dspr2(YV12_BUFFER_CONFIG *ybf) {
+  extend_frame(ybf, ybf->border);
+}
+
+void aom_extend_frame_inner_borders_dspr2(YV12_BUFFER_CONFIG *ybf) {
+  const int inner_bw = (ybf->border > AOMINNERBORDERINPIXELS)
+                           ? AOMINNERBORDERINPIXELS
+                           : ybf->border;
+  extend_frame(ybf, inner_bw);
+}
+#endif