134 строки
3.9 KiB
C
134 строки
3.9 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AV1_COMMON_ENTROPYMV_H_
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#define AV1_COMMON_ENTROPYMV_H_
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#include "./aom_config.h"
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#include "aom_dsp/prob.h"
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#include "av1/common/mv.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct AV1Common;
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void av1_init_mv_probs(struct AV1Common *cm);
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void av1_adapt_mv_probs(struct AV1Common *cm, int usehp);
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int av1_use_mv_hp(const MV *ref);
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#define MV_UPDATE_PROB 252
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/* Symbols for coding which components are zero jointly */
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#define MV_JOINTS 4
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typedef enum {
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MV_JOINT_ZERO = 0, /* Zero vector */
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MV_JOINT_HNZVZ = 1, /* Vert zero, hor nonzero */
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MV_JOINT_HZVNZ = 2, /* Hor zero, vert nonzero */
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MV_JOINT_HNZVNZ = 3, /* Both components nonzero */
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} MV_JOINT_TYPE;
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static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
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return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
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}
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static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
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return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
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}
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/* Symbols for coding magnitude class of nonzero components */
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#define MV_CLASSES 11
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typedef enum {
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MV_CLASS_0 = 0, /* (0, 2] integer pel */
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MV_CLASS_1 = 1, /* (2, 4] integer pel */
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MV_CLASS_2 = 2, /* (4, 8] integer pel */
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MV_CLASS_3 = 3, /* (8, 16] integer pel */
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MV_CLASS_4 = 4, /* (16, 32] integer pel */
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MV_CLASS_5 = 5, /* (32, 64] integer pel */
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MV_CLASS_6 = 6, /* (64, 128] integer pel */
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MV_CLASS_7 = 7, /* (128, 256] integer pel */
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MV_CLASS_8 = 8, /* (256, 512] integer pel */
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MV_CLASS_9 = 9, /* (512, 1024] integer pel */
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MV_CLASS_10 = 10, /* (1024,2048] integer pel */
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} MV_CLASS_TYPE;
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#define CLASS0_BITS 1 /* bits at integer precision for class 0 */
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#define CLASS0_SIZE (1 << CLASS0_BITS)
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#define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
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#define MV_FP_SIZE 4
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#define MV_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
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#define MV_MAX ((1 << MV_MAX_BITS) - 1)
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#define MV_VALS ((MV_MAX << 1) + 1)
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#define MV_IN_USE_BITS 14
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#define MV_UPP ((1 << MV_IN_USE_BITS) - 1)
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#define MV_LOW (-(1 << MV_IN_USE_BITS))
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extern const aom_tree_index av1_mv_joint_tree[];
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extern const aom_tree_index av1_mv_class_tree[];
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extern const aom_tree_index av1_mv_class0_tree[];
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extern const aom_tree_index av1_mv_fp_tree[];
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typedef struct {
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aom_prob sign;
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aom_prob classes[MV_CLASSES - 1];
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aom_prob class0[CLASS0_SIZE - 1];
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aom_prob bits[MV_OFFSET_BITS];
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aom_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
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aom_prob fp[MV_FP_SIZE - 1];
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aom_prob class0_hp;
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aom_prob hp;
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} nmv_component;
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typedef struct {
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aom_prob joints[MV_JOINTS - 1];
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nmv_component comps[2];
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} nmv_context;
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static INLINE MV_JOINT_TYPE av1_get_mv_joint(const MV *mv) {
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if (mv->row == 0) {
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return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
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} else {
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return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
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}
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}
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MV_CLASS_TYPE av1_get_mv_class(int z, int *offset);
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typedef struct {
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unsigned int sign[2];
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unsigned int classes[MV_CLASSES];
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unsigned int class0[CLASS0_SIZE];
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unsigned int bits[MV_OFFSET_BITS][2];
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unsigned int class0_fp[CLASS0_SIZE][MV_FP_SIZE];
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unsigned int fp[MV_FP_SIZE];
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unsigned int class0_hp[2];
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unsigned int hp[2];
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} nmv_component_counts;
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typedef struct {
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unsigned int joints[MV_JOINTS];
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nmv_component_counts comps[2];
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} nmv_context_counts;
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void av1_inc_mv(const MV *mv, nmv_context_counts *mvctx, const int usehp);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AV1_COMMON_ENTROPYMV_H_
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