1 files changed, 134 insertions, 0 deletions
diff --git a/media/libvpx/vp9/common/vp9_entropymv.h b/media/libvpx/vp9/common/vp9_entropymv.h
new file mode 100644
index 0000000000..75e6861f4d
--- /dev/null
+++ b/media/libvpx/vp9/common/vp9_entropymv.h
@@ -0,0 +1,134 @@
+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+
+#ifndef VP9_COMMON_VP9_ENTROPYMV_H_
+#define VP9_COMMON_VP9_ENTROPYMV_H_
+
+#include "./vpx_config.h"
+
+#include "vp9/common/vp9_mv.h"
+#include "vp9/common/vp9_prob.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct VP9Common;
+
+void vp9_init_mv_probs(struct VP9Common *cm);
+
+void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);
+int vp9_use_mv_hp(const MV *ref);
+
+#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 vp9_tree_index vp9_mv_joint_tree[];
+extern const vp9_tree_index vp9_mv_class_tree[];
+extern const vp9_tree_index vp9_mv_class0_tree[];
+extern const vp9_tree_index vp9_mv_fp_tree[];
+
+typedef struct {
+  vp9_prob sign;
+  vp9_prob classes[MV_CLASSES - 1];
+  vp9_prob class0[CLASS0_SIZE - 1];
+  vp9_prob bits[MV_OFFSET_BITS];
+  vp9_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
+  vp9_prob fp[MV_FP_SIZE - 1];
+  vp9_prob class0_hp;
+  vp9_prob hp;
+} nmv_component;
+
+typedef struct {
+  vp9_prob joints[MV_JOINTS - 1];
+  nmv_component comps[2];
+} nmv_context;
+
+static INLINE MV_JOINT_TYPE vp9_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 vp9_get_mv_class(int z, int *offset);
+int vp9_get_mv_mag(MV_CLASS_TYPE c, 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 vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VP9_COMMON_VP9_ENTROPYMV_H_