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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#ifndef AV1_COMMON_ENTROPYMV_H_
#define AV1_COMMON_ENTROPYMV_H_
#include "./aom_config.h"
#include "aom_dsp/prob.h"
#include "av1/common/mv.h"
#ifdef __cplusplus
extern "C" {
#endif
struct AV1Common;
void av1_init_mv_probs(struct AV1Common *cm);
void av1_adapt_mv_probs(struct AV1Common *cm, int usehp);
#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 aom_tree_index av1_mv_joint_tree[];
extern const aom_tree_index av1_mv_class_tree[];
extern const aom_tree_index av1_mv_class0_tree[];
extern const aom_tree_index av1_mv_fp_tree[];
typedef struct {
aom_prob sign;
aom_prob classes[MV_CLASSES - 1];
#if CONFIG_EC_MULTISYMBOL
aom_cdf_prob class_cdf[CDF_SIZE(MV_CLASSES)];
#endif
aom_prob class0[CLASS0_SIZE - 1];
aom_prob bits[MV_OFFSET_BITS];
aom_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
aom_prob fp[MV_FP_SIZE - 1];
#if CONFIG_EC_MULTISYMBOL
aom_cdf_prob class0_fp_cdf[CLASS0_SIZE][CDF_SIZE(MV_FP_SIZE)];
aom_cdf_prob fp_cdf[CDF_SIZE(MV_FP_SIZE)];
#endif
aom_prob class0_hp;
aom_prob hp;
} nmv_component;
typedef struct {
aom_prob joints[MV_JOINTS - 1];
#if CONFIG_EC_MULTISYMBOL
aom_cdf_prob joint_cdf[CDF_SIZE(MV_JOINTS)];
#endif
nmv_component comps[2];
} nmv_context;
static INLINE MV_JOINT_TYPE av1_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 av1_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 av1_inc_mv(const MV *mv, nmv_context_counts *mvctx, const int usehp);
#if CONFIG_GLOBAL_MOTION
extern const aom_tree_index
av1_global_motion_types_tree[TREE_SIZE(GLOBAL_TRANS_TYPES)];
#endif // CONFIG_GLOBAL_MOTION
#if CONFIG_EC_MULTISYMBOL
void av1_set_mv_cdfs(nmv_context *ctx);
#endif
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AV1_COMMON_ENTROPYMV_H_
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