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, 50 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/pvq_state.c b/third_party/aom/av1/common/pvq_state.c
new file mode 100644
index 000000000..197b9b3a8
--- /dev/null
+++ b/third_party/aom/av1/common/pvq_state.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2001-2016, 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/common/pvq_state.h"
+#include "av1/common/odintrin.h"
+
+void od_adapt_ctx_reset(od_adapt_ctx *adapt, int is_keyframe) {
+  int pli;
+  od_adapt_pvq_ctx_reset(&adapt->pvq, is_keyframe);
+  OD_CDFS_INIT_Q15(adapt->skip_cdf);
+  for (pli = 0; pli < OD_NPLANES_MAX; pli++) {
+    int i;
+    OD_CDFS_INIT_DYNAMIC(adapt->model_dc[pli].cdf);
+    for (i = 0; i < OD_TXSIZES; i++) {
+      int j;
+      adapt->ex_g[pli][i] = 8;
+      for (j = 0; j < 3; j++) {
+        adapt->ex_dc[pli][i][j] = pli > 0 ? 8 : 32768;
+      }
+    }
+  }
+}
+
+void od_init_skipped_coeffs(int16_t *d, int16_t *pred, int is_keyframe, int bo,
+                            int n, int w) {
+  int i;
+  int j;
+  if (is_keyframe) {
+    for (i = 0; i < n; i++) {
+      for (j = 0; j < n; j++) {
+        /* skip DC */
+        if (i || j) d[bo + i * w + j] = 0;
+      }
+    }
+  } else {
+    for (i = 0; i < n; i++) {
+      for (j = 0; j < n; j++) {
+        d[bo + i * w + j] = pred[i * n + j];
+      }
+    }
+  }
+}