1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vp9/common/vp9_entropymv.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,132 @@
1.4 +/*
1.5 + * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +
1.15 +#ifndef VP9_COMMON_VP9_ENTROPYMV_H_
1.16 +#define VP9_COMMON_VP9_ENTROPYMV_H_
1.17 +
1.18 +#include "vp9/common/vp9_treecoder.h"
1.19 +#include "./vpx_config.h"
1.20 +#include "vp9/common/vp9_blockd.h"
1.21 +
1.22 +struct VP9Common;
1.23 +
1.24 +void vp9_entropy_mv_init();
1.25 +void vp9_init_mv_probs(struct VP9Common *cm);
1.26 +
1.27 +void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);
1.28 +int vp9_use_mv_hp(const MV *ref);
1.29 +
1.30 +#define NMV_UPDATE_PROB 252
1.31 +
1.32 +/* Symbols for coding which components are zero jointly */
1.33 +#define MV_JOINTS 4
1.34 +typedef enum {
1.35 + MV_JOINT_ZERO = 0, /* Zero vector */
1.36 + MV_JOINT_HNZVZ = 1, /* Vert zero, hor nonzero */
1.37 + MV_JOINT_HZVNZ = 2, /* Hor zero, vert nonzero */
1.38 + MV_JOINT_HNZVNZ = 3, /* Both components nonzero */
1.39 +} MV_JOINT_TYPE;
1.40 +
1.41 +static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
1.42 + return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
1.43 +}
1.44 +
1.45 +static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
1.46 + return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
1.47 +}
1.48 +
1.49 +/* Symbols for coding magnitude class of nonzero components */
1.50 +#define MV_CLASSES 11
1.51 +typedef enum {
1.52 + MV_CLASS_0 = 0, /* (0, 2] integer pel */
1.53 + MV_CLASS_1 = 1, /* (2, 4] integer pel */
1.54 + MV_CLASS_2 = 2, /* (4, 8] integer pel */
1.55 + MV_CLASS_3 = 3, /* (8, 16] integer pel */
1.56 + MV_CLASS_4 = 4, /* (16, 32] integer pel */
1.57 + MV_CLASS_5 = 5, /* (32, 64] integer pel */
1.58 + MV_CLASS_6 = 6, /* (64, 128] integer pel */
1.59 + MV_CLASS_7 = 7, /* (128, 256] integer pel */
1.60 + MV_CLASS_8 = 8, /* (256, 512] integer pel */
1.61 + MV_CLASS_9 = 9, /* (512, 1024] integer pel */
1.62 + MV_CLASS_10 = 10, /* (1024,2048] integer pel */
1.63 +} MV_CLASS_TYPE;
1.64 +
1.65 +#define CLASS0_BITS 1 /* bits at integer precision for class 0 */
1.66 +#define CLASS0_SIZE (1 << CLASS0_BITS)
1.67 +#define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
1.68 +
1.69 +#define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
1.70 +#define MV_MAX ((1 << MV_MAX_BITS) - 1)
1.71 +#define MV_VALS ((MV_MAX << 1) + 1)
1.72 +
1.73 +#define MV_IN_USE_BITS 14
1.74 +#define MV_UPP ((1 << MV_IN_USE_BITS) - 1)
1.75 +#define MV_LOW (-(1 << MV_IN_USE_BITS))
1.76 +
1.77 +extern const vp9_tree_index vp9_mv_joint_tree[TREE_SIZE(MV_JOINTS)];
1.78 +extern struct vp9_token vp9_mv_joint_encodings[MV_JOINTS];
1.79 +
1.80 +extern const vp9_tree_index vp9_mv_class_tree[TREE_SIZE(MV_CLASSES)];
1.81 +extern struct vp9_token vp9_mv_class_encodings[MV_CLASSES];
1.82 +
1.83 +extern const vp9_tree_index vp9_mv_class0_tree[TREE_SIZE(CLASS0_SIZE)];
1.84 +extern struct vp9_token vp9_mv_class0_encodings[CLASS0_SIZE];
1.85 +
1.86 +extern const vp9_tree_index vp9_mv_fp_tree[TREE_SIZE(4)];
1.87 +extern struct vp9_token vp9_mv_fp_encodings[4];
1.88 +
1.89 +typedef struct {
1.90 + vp9_prob sign;
1.91 + vp9_prob classes[MV_CLASSES - 1];
1.92 + vp9_prob class0[CLASS0_SIZE - 1];
1.93 + vp9_prob bits[MV_OFFSET_BITS];
1.94 + vp9_prob class0_fp[CLASS0_SIZE][4 - 1];
1.95 + vp9_prob fp[4 - 1];
1.96 + vp9_prob class0_hp;
1.97 + vp9_prob hp;
1.98 +} nmv_component;
1.99 +
1.100 +typedef struct {
1.101 + vp9_prob joints[MV_JOINTS - 1];
1.102 + nmv_component comps[2];
1.103 +} nmv_context;
1.104 +
1.105 +static INLINE MV_JOINT_TYPE vp9_get_mv_joint(const MV *mv) {
1.106 + if (mv->row == 0) {
1.107 + return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
1.108 + } else {
1.109 + return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
1.110 + }
1.111 +}
1.112 +
1.113 +MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset);
1.114 +int vp9_get_mv_mag(MV_CLASS_TYPE c, int offset);
1.115 +
1.116 +
1.117 +typedef struct {
1.118 + unsigned int sign[2];
1.119 + unsigned int classes[MV_CLASSES];
1.120 + unsigned int class0[CLASS0_SIZE];
1.121 + unsigned int bits[MV_OFFSET_BITS][2];
1.122 + unsigned int class0_fp[CLASS0_SIZE][4];
1.123 + unsigned int fp[4];
1.124 + unsigned int class0_hp[2];
1.125 + unsigned int hp[2];
1.126 +} nmv_component_counts;
1.127 +
1.128 +typedef struct {
1.129 + unsigned int joints[MV_JOINTS];
1.130 + nmv_component_counts comps[2];
1.131 +} nmv_context_counts;
1.132 +
1.133 +void vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx);
1.134 +
1.135 +#endif // VP9_COMMON_VP9_ENTROPYMV_H_
