1 /* 2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AV1_COMMON_ENTROPYMV_H_ 13 #define AOM_AV1_COMMON_ENTROPYMV_H_ 14 15 #include "config/aom_config.h" 16 17 #include "aom_dsp/prob.h" 18 19 #include "av1/common/mv.h" 20 21 #ifdef __cplusplus 22 extern "C" { 23 #endif 24 25 struct AV1Common; 26 27 void av1_init_mv_probs(struct AV1Common *cm); 28 29 #define MV_UPDATE_PROB 252 30 31 /* Symbols for coding which components are zero jointly */ 32 #define MV_JOINTS 4 33 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 } UENUM1BYTE(MV_JOINT_TYPE); 39 40 static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) { 41 return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ; 42 } 43 44 static 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 50 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 } UENUM1BYTE(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_BITS_CONTEXTS 6 68 #define MV_FP_SIZE 4 69 70 #define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2) 71 #define MV_MAX ((1 << MV_MAX_BITS) - 1) 72 #define MV_VALS ((MV_MAX << 1) + 1) 73 74 #define MV_IN_USE_BITS 14 75 #define MV_UPP (1 << MV_IN_USE_BITS) 76 #define MV_LOW (-(1 << MV_IN_USE_BITS)) 77 78 typedef struct { 79 aom_cdf_prob classes_cdf[CDF_SIZE(MV_CLASSES)]; 80 aom_cdf_prob class0_fp_cdf[CLASS0_SIZE][CDF_SIZE(MV_FP_SIZE)]; 81 aom_cdf_prob fp_cdf[CDF_SIZE(MV_FP_SIZE)]; 82 aom_cdf_prob sign_cdf[CDF_SIZE(2)]; 83 aom_cdf_prob class0_hp_cdf[CDF_SIZE(2)]; 84 aom_cdf_prob hp_cdf[CDF_SIZE(2)]; 85 aom_cdf_prob class0_cdf[CDF_SIZE(CLASS0_SIZE)]; 86 aom_cdf_prob bits_cdf[MV_OFFSET_BITS][CDF_SIZE(2)]; 87 } nmv_component; 88 89 typedef struct { 90 aom_cdf_prob joints_cdf[CDF_SIZE(MV_JOINTS)]; 91 nmv_component comps[2]; 92 } nmv_context; 93 94 enum { 95 MV_SUBPEL_NONE = -1, 96 MV_SUBPEL_LOW_PRECISION = 0, 97 MV_SUBPEL_HIGH_PRECISION, 98 } SENUM1BYTE(MvSubpelPrecision); 99 100 #ifdef __cplusplus 101 } // extern "C" 102 #endif 103 104 #endif // AOM_AV1_COMMON_ENTROPYMV_H_ 105
