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, 149 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/entropymv.h b/third_party/aom/av1/common/entropymv.h
new file mode 100644
index 000000000..2c79d447a
--- /dev/null
+++ b/third_party/aom/av1/common/entropymv.h
@@ -0,0 +1,149 @@
+/*
+ * 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.
+ */
+
+#ifndef AV1_COMMON_ENTROPYMV_H_
+#define AV1_COMMON_ENTROPYMV_H_
+
+#include "./aom_config.h"
+
+#include "aom_dsp/prob.h"
+
+#include "av1/common/mv.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct AV1Common;
+
+void av1_init_mv_probs(struct AV1Common *cm);
+
+void av1_adapt_mv_probs(struct AV1Common *cm, int usehp);
+
+#define MV_UPDATE_PROB 252
+
+/* Symbols for coding which components are zero jointly */
+#define MV_JOINTS 4
+typedef enum {
+  MV_JOINT_ZERO = 0,   /* Zero vector */
+  MV_JOINT_HNZVZ = 1,  /* Vert zero, hor nonzero */
+  MV_JOINT_HZVNZ = 2,  /* Hor zero, vert nonzero */
+  MV_JOINT_HNZVNZ = 3, /* Both components nonzero */
+} MV_JOINT_TYPE;
+
+static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
+  return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
+}
+
+static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
+  return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
+}
+
+/* Symbols for coding magnitude class of nonzero components */
+#define MV_CLASSES 11
+typedef enum {
+  MV_CLASS_0 = 0,   /* (0, 2]     integer pel */
+  MV_CLASS_1 = 1,   /* (2, 4]     integer pel */
+  MV_CLASS_2 = 2,   /* (4, 8]     integer pel */
+  MV_CLASS_3 = 3,   /* (8, 16]    integer pel */
+  MV_CLASS_4 = 4,   /* (16, 32]   integer pel */
+  MV_CLASS_5 = 5,   /* (32, 64]   integer pel */
+  MV_CLASS_6 = 6,   /* (64, 128]  integer pel */
+  MV_CLASS_7 = 7,   /* (128, 256] integer pel */
+  MV_CLASS_8 = 8,   /* (256, 512] integer pel */
+  MV_CLASS_9 = 9,   /* (512, 1024] integer pel */
+  MV_CLASS_10 = 10, /* (1024,2048] integer pel */
+} MV_CLASS_TYPE;
+
+#define CLASS0_BITS 1 /* bits at integer precision for class 0 */
+#define CLASS0_SIZE (1 << CLASS0_BITS)
+#define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
+#define MV_FP_SIZE 4
+
+#define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
+#define MV_MAX ((1 << MV_MAX_BITS) - 1)
+#define MV_VALS ((MV_MAX << 1) + 1)
+
+#define MV_IN_USE_BITS 14
+#define MV_UPP ((1 << MV_IN_USE_BITS) - 1)
+#define MV_LOW (-(1 << MV_IN_USE_BITS))
+
+extern const aom_tree_index av1_mv_joint_tree[];
+extern const aom_tree_index av1_mv_class_tree[];
+extern const aom_tree_index av1_mv_class0_tree[];
+extern const aom_tree_index av1_mv_fp_tree[];
+
+typedef struct {
+  aom_prob sign;
+  aom_prob classes[MV_CLASSES - 1];
+#if CONFIG_EC_MULTISYMBOL
+  aom_cdf_prob class_cdf[CDF_SIZE(MV_CLASSES)];
+#endif
+  aom_prob class0[CLASS0_SIZE - 1];
+  aom_prob bits[MV_OFFSET_BITS];
+  aom_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
+  aom_prob fp[MV_FP_SIZE - 1];
+#if CONFIG_EC_MULTISYMBOL
+  aom_cdf_prob class0_fp_cdf[CLASS0_SIZE][CDF_SIZE(MV_FP_SIZE)];
+  aom_cdf_prob fp_cdf[CDF_SIZE(MV_FP_SIZE)];
+#endif
+  aom_prob class0_hp;
+  aom_prob hp;
+} nmv_component;
+
+typedef struct {
+  aom_prob joints[MV_JOINTS - 1];
+#if CONFIG_EC_MULTISYMBOL
+  aom_cdf_prob joint_cdf[CDF_SIZE(MV_JOINTS)];
+#endif
+  nmv_component comps[2];
+} nmv_context;
+
+static INLINE MV_JOINT_TYPE av1_get_mv_joint(const MV *mv) {
+  if (mv->row == 0) {
+    return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
+  } else {
+    return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
+  }
+}
+
+MV_CLASS_TYPE av1_get_mv_class(int z, int *offset);
+
+typedef struct {
+  unsigned int sign[2];
+  unsigned int classes[MV_CLASSES];
+  unsigned int class0[CLASS0_SIZE];
+  unsigned int bits[MV_OFFSET_BITS][2];
+  unsigned int class0_fp[CLASS0_SIZE][MV_FP_SIZE];
+  unsigned int fp[MV_FP_SIZE];
+  unsigned int class0_hp[2];
+  unsigned int hp[2];
+} nmv_component_counts;
+
+typedef struct {
+  unsigned int joints[MV_JOINTS];
+  nmv_component_counts comps[2];
+} nmv_context_counts;
+
+void av1_inc_mv(const MV *mv, nmv_context_counts *mvctx, const int usehp);
+#if CONFIG_GLOBAL_MOTION
+extern const aom_tree_index
+    av1_global_motion_types_tree[TREE_SIZE(GLOBAL_TRANS_TYPES)];
+#endif  // CONFIG_GLOBAL_MOTION
+#if CONFIG_EC_MULTISYMBOL
+void av1_set_mv_cdfs(nmv_context *ctx);
+#endif
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AV1_COMMON_ENTROPYMV_H_