ref: 411f9e2b7f1cb93e6251421faf433b0b2f56e0b0
dir: /vp8/common/entropymv.h/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef __INC_ENTROPYMV_H
#define __INC_ENTROPYMV_H
#include "treecoder.h"
#include "vpx_config.h"
#include "blockd.h"
struct VP8Common;
void vp8_entropy_mv_init();
void vp8_init_mv_probs(struct VP8Common *cm);
void vp8_adapt_mv_probs(struct VP8Common *cm);
void vp8_adapt_nmv_probs(struct VP8Common *cm, int usehp);
void vp8_lower_mv_precision(MV *mv);
int vp8_use_nmv_hp(const MV *ref);
#define VP8_NMV_UPDATE_PROB 255
//#define MV_GROUP_UPDATE
#define LOW_PRECISION_MV_UPDATE /* Use 7 bit forward update */
/* 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;
extern const vp8_tree_index vp8_mv_joint_tree[2 * MV_JOINTS - 2];
extern struct vp8_token_struct vp8_mv_joint_encodings [MV_JOINTS];
/* Symbols for coding magnitude class of nonzero components */
#define MV_CLASSES 8
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_TYPE;
extern const vp8_tree_index vp8_mv_class_tree[2 * MV_CLASSES - 2];
extern struct vp8_token_struct vp8_mv_class_encodings [MV_CLASSES];
#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_MAX_BITS (MV_CLASSES + CLASS0_BITS + 2)
#define MV_MAX ((1 << MV_MAX_BITS) - 1)
#define MV_VALS ((MV_MAX << 1) + 1)
extern const vp8_tree_index vp8_mv_class0_tree[2 * CLASS0_SIZE - 2];
extern struct vp8_token_struct vp8_mv_class0_encodings[CLASS0_SIZE];
extern const vp8_tree_index vp8_mv_fp_tree[2 * 4 - 2];
extern struct vp8_token_struct vp8_mv_fp_encodings[4];
typedef struct {
vp8_prob sign;
vp8_prob classes[MV_CLASSES - 1];
vp8_prob class0[CLASS0_SIZE - 1];
vp8_prob bits[MV_OFFSET_BITS];
vp8_prob class0_fp[CLASS0_SIZE][4 - 1];
vp8_prob fp[4 - 1];
vp8_prob class0_hp;
vp8_prob hp;
} nmv_component;
typedef struct {
vp8_prob joints[MV_JOINTS - 1];
nmv_component comps[2];
} nmv_context;
MV_JOINT_TYPE vp8_get_mv_joint(MV mv);
MV_CLASS_TYPE vp8_get_mv_class(int z, int *offset);
int vp8_get_mv_mag(MV_CLASS_TYPE c, int offset);
typedef struct {
unsigned int mvcount[MV_VALS];
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][4];
unsigned int fp[4];
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 vp8_increment_nmv(const MV *mv, const MV *ref, nmv_context_counts *mvctx,
int usehp);
extern const nmv_context vp8_default_nmv_context;
void vp8_counts_to_nmv_context(
nmv_context_counts *NMVcount,
nmv_context *prob,
int usehp,
unsigned int (*branch_ct_joint)[2],
unsigned int (*branch_ct_sign)[2],
unsigned int (*branch_ct_classes)[MV_CLASSES - 1][2],
unsigned int (*branch_ct_class0)[CLASS0_SIZE - 1][2],
unsigned int (*branch_ct_bits)[MV_OFFSET_BITS][2],
unsigned int (*branch_ct_class0_fp)[CLASS0_SIZE][4 - 1][2],
unsigned int (*branch_ct_fp)[4 - 1][2],
unsigned int (*branch_ct_class0_hp)[2],
unsigned int (*branch_ct_hp)[2]);
#endif