1 files changed, 136 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/common/vp9_entropymv.h b/media/libvpx/libvpx/vp9/common/vp9_entropymv.h
new file mode 100644
index 0000000000..ee9d37973f
--- /dev/null
+++ b/media/libvpx/libvpx/vp9/common/vp9_entropymv.h
@@ -0,0 +1,136 @@
+/*
+ *  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 VPX_VP9_COMMON_VP9_ENTROPYMV_H_
+#define VPX_VP9_COMMON_VP9_ENTROPYMV_H_
+
+#include "./vpx_config.h"
+
+#include "vpx_dsp/prob.h"
+
+#include "vp9/common/vp9_mv.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 allow_hp);
+
+static INLINE int use_mv_hp(const MV *ref) {
+  const int kMvRefThresh = 64;  // threshold for use of high-precision 1/8 mv
+  return abs(ref->row) < kMvRefThresh && abs(ref->col) < kMvRefThresh;
+}
+
+#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 vpx_tree_index vp9_mv_joint_tree[];
+extern const vpx_tree_index vp9_mv_class_tree[];
+extern const vpx_tree_index vp9_mv_class0_tree[];
+extern const vpx_tree_index vp9_mv_fp_tree[];
+
+typedef struct {
+  vpx_prob sign;
+  vpx_prob classes[MV_CLASSES - 1];
+  vpx_prob class0[CLASS0_SIZE - 1];
+  vpx_prob bits[MV_OFFSET_BITS];
+  vpx_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
+  vpx_prob fp[MV_FP_SIZE - 1];
+  vpx_prob class0_hp;
+  vpx_prob hp;
+} nmv_component;
+
+typedef struct {
+  vpx_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);
+
+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 *counts);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VPX_VP9_COMMON_VP9_ENTROPYMV_H_