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/*
* Copyright (c) 2021, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 3-Clause Clear License
* and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
* License was not distributed with this source code in the LICENSE file, you
* can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. 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
* aomedia.org/license/patent-license/.
*/
#ifndef AOM_AV1_COMMON_ENTROPYMV_H_
#define AOM_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
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 */
} UENUM1BYTE(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
enum {
/* Class specifies the integer pel range */
MV_CLASS_0 = 0, /* When AMVD is applied:(0, 1], {2}. Otherwise:(0, 2] */
MV_CLASS_1 = 1, /* When AMVD is applied:{4}. Otherwise:(2, 4] */
MV_CLASS_2 = 2, /* When AMVD is applied:{8}. Otherwise:(4, 8] */
MV_CLASS_3 = 3, /* When AMVD is applied:{16}. Otherwise:(8, 16] */
MV_CLASS_4 = 4, /* When AMVD is applied:{32}. Otherwise:(16, 32] */
MV_CLASS_5 = 5, /* When AMVD is applied:{64}. Otherwise:(32, 64] */
MV_CLASS_6 = 6, /* When AMVD is applied:{128}. Otherwise:(64, 128] */
MV_CLASS_7 = 7, /* When AMVD is applied:{256}. Otherwise:(128, 256] */
MV_CLASS_8 = 8, /* When AMVD is applied:{512}. Otherwise:(256, 512] */
MV_CLASS_9 = 9, /* When AMVD is applied:{1024}. Otherwise:(512, 1024] */
MV_CLASS_10 = 10, /* When AMVD is applied:{2048}. Otherwise:(1024,2048] */
} UENUM1BYTE(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
#if !CONFIG_FLEX_MVRES
#define MV_FP_SIZE 4
#endif
#define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
#define MV_MAX ((1 << MV_MAX_BITS) - 1)
#define MV_VALS ((MV_MAX << 1) + 1)
typedef struct {
#if CONFIG_FLEX_MVRES
aom_cdf_prob classes_cdf[NUM_MV_PRECISIONS][CDF_SIZE(MV_CLASSES)];
#if CONFIG_ADAPTIVE_MVD
aom_cdf_prob amvd_classes_cdf[CDF_SIZE(MV_CLASSES)];
#endif // CONFIG_ADAPTIVE_MVD
aom_cdf_prob class0_fp_cdf[CLASS0_SIZE][3][CDF_SIZE(2)];
aom_cdf_prob fp_cdf[3][CDF_SIZE(2)];
#else
aom_cdf_prob classes_cdf[CDF_SIZE(MV_CLASSES)];
#if CONFIG_ADAPTIVE_MVD
aom_cdf_prob amvd_classes_cdf[CDF_SIZE(MV_CLASSES)];
#endif // CONFIG_ADAPTIVE_MVD
aom_cdf_prob class0_fp_cdf[CLASS0_SIZE][CDF_SIZE(MV_FP_SIZE)];
aom_cdf_prob fp_cdf[CDF_SIZE(MV_FP_SIZE)];
#endif // CONFIG_FLEX_MVRES
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)];
#if CONFIG_ADAPTIVE_MVD
aom_cdf_prob amvd_joints_cdf[CDF_SIZE(MV_JOINTS)];
#endif // CONFIG_ADAPTIVE_MVD
nmv_component comps[2];
} nmv_context;
#if !CONFIG_FLEX_MVRES
enum {
MV_SUBPEL_NONE = -1,
MV_SUBPEL_LOW_PRECISION = 0,
MV_SUBPEL_HIGH_PRECISION,
} SENUM1BYTE(MvSubpelPrecision);
#endif
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_COMMON_ENTROPYMV_H_