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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 "config/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);
#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_BITS_CONTEXTS 6
#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)
#define MV_LOW (-(1 << MV_IN_USE_BITS))
typedef struct {
aom_cdf_prob classes_cdf[CDF_SIZE(MV_CLASSES)];
aom_cdf_prob class0_fp_cdf[CLASS0_SIZE][CDF_SIZE(MV_FP_SIZE)];
aom_cdf_prob fp_cdf[CDF_SIZE(MV_FP_SIZE)];
aom_cdf_prob sign_cdf[CDF_SIZE(2)];
aom_cdf_prob class0_hp_cdf[CDF_SIZE(2)];
aom_cdf_prob hp_cdf[CDF_SIZE(2)];
aom_cdf_prob class0_cdf[CDF_SIZE(CLASS0_SIZE)];
aom_cdf_prob bits_cdf[MV_OFFSET_BITS][CDF_SIZE(2)];
} nmv_component;
typedef struct {
aom_cdf_prob joints_cdf[CDF_SIZE(MV_JOINTS)];
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 enum {
MV_SUBPEL_NONE = -1,
MV_SUBPEL_LOW_PRECISION = 0,
MV_SUBPEL_HIGH_PRECISION,
} MvSubpelPrecision;
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AV1_COMMON_ENTROPYMV_H_
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