1/* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 12#ifndef VP9_COMMON_VP9_ENTROPYMV_H_ 13#define VP9_COMMON_VP9_ENTROPYMV_H_ 14 15#include "./vpx_config.h" 16#include "vp9/common/vp9_blockd.h" 17 18#ifdef __cplusplus 19extern "C" { 20#endif 21 22struct VP9Common; 23 24void vp9_init_mv_probs(struct VP9Common *cm); 25 26void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp); 27int vp9_use_mv_hp(const MV *ref); 28 29#define MV_UPDATE_PROB 252 30 31/* Symbols for coding which components are zero jointly */ 32#define MV_JOINTS 4 33typedef enum { 34 MV_JOINT_ZERO = 0, /* Zero vector */ 35 MV_JOINT_HNZVZ = 1, /* Vert zero, hor nonzero */ 36 MV_JOINT_HZVNZ = 2, /* Hor zero, vert nonzero */ 37 MV_JOINT_HNZVNZ = 3, /* Both components nonzero */ 38} MV_JOINT_TYPE; 39 40static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) { 41 return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ; 42} 43 44static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) { 45 return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ; 46} 47 48/* Symbols for coding magnitude class of nonzero components */ 49#define MV_CLASSES 11 50typedef enum { 51 MV_CLASS_0 = 0, /* (0, 2] integer pel */ 52 MV_CLASS_1 = 1, /* (2, 4] integer pel */ 53 MV_CLASS_2 = 2, /* (4, 8] integer pel */ 54 MV_CLASS_3 = 3, /* (8, 16] integer pel */ 55 MV_CLASS_4 = 4, /* (16, 32] integer pel */ 56 MV_CLASS_5 = 5, /* (32, 64] integer pel */ 57 MV_CLASS_6 = 6, /* (64, 128] integer pel */ 58 MV_CLASS_7 = 7, /* (128, 256] integer pel */ 59 MV_CLASS_8 = 8, /* (256, 512] integer pel */ 60 MV_CLASS_9 = 9, /* (512, 1024] integer pel */ 61 MV_CLASS_10 = 10, /* (1024,2048] integer pel */ 62} MV_CLASS_TYPE; 63 64#define CLASS0_BITS 1 /* bits at integer precision for class 0 */ 65#define CLASS0_SIZE (1 << CLASS0_BITS) 66#define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2) 67#define MV_FP_SIZE 4 68 69#define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2) 70#define MV_MAX ((1 << MV_MAX_BITS) - 1) 71#define MV_VALS ((MV_MAX << 1) + 1) 72 73#define MV_IN_USE_BITS 14 74#define MV_UPP ((1 << MV_IN_USE_BITS) - 1) 75#define MV_LOW (-(1 << MV_IN_USE_BITS)) 76 77extern const vp9_tree_index vp9_mv_joint_tree[]; 78extern const vp9_tree_index vp9_mv_class_tree[]; 79extern const vp9_tree_index vp9_mv_class0_tree[]; 80extern const vp9_tree_index vp9_mv_fp_tree[]; 81 82typedef struct { 83 vp9_prob sign; 84 vp9_prob classes[MV_CLASSES - 1]; 85 vp9_prob class0[CLASS0_SIZE - 1]; 86 vp9_prob bits[MV_OFFSET_BITS]; 87 vp9_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1]; 88 vp9_prob fp[MV_FP_SIZE - 1]; 89 vp9_prob class0_hp; 90 vp9_prob hp; 91} nmv_component; 92 93typedef struct { 94 vp9_prob joints[MV_JOINTS - 1]; 95 nmv_component comps[2]; 96} nmv_context; 97 98static INLINE MV_JOINT_TYPE vp9_get_mv_joint(const MV *mv) { 99 if (mv->row == 0) { 100 return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ; 101 } else { 102 return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ; 103 } 104} 105 106MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset); 107int vp9_get_mv_mag(MV_CLASS_TYPE c, int offset); 108 109 110typedef struct { 111 unsigned int sign[2]; 112 unsigned int classes[MV_CLASSES]; 113 unsigned int class0[CLASS0_SIZE]; 114 unsigned int bits[MV_OFFSET_BITS][2]; 115 unsigned int class0_fp[CLASS0_SIZE][MV_FP_SIZE]; 116 unsigned int fp[MV_FP_SIZE]; 117 unsigned int class0_hp[2]; 118 unsigned int hp[2]; 119} nmv_component_counts; 120 121typedef struct { 122 unsigned int joints[MV_JOINTS]; 123 nmv_component_counts comps[2]; 124} nmv_context_counts; 125 126void vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx); 127 128#ifdef __cplusplus 129} // extern "C" 130#endif 131 132#endif // VP9_COMMON_VP9_ENTROPYMV_H_ 133