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/*
* 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 VP9_COMMON_VP9_ENTROPYMV_H_
#define VP9_COMMON_VP9_ENTROPYMV_H_
#include "./vpx_config.h"
#include "vp9/common/vp9_mv.h"
#include "vp9/common/vp9_prob.h"
#ifdef __cplusplus
extern "C" {
#endif
struct VP9Common;
void vp9_init_mv_probs(struct VP9Common *cm);
void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);
int vp9_use_mv_hp(const MV *ref);
#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 vp9_tree_index vp9_mv_joint_tree[];
extern const vp9_tree_index vp9_mv_class_tree[];
extern const vp9_tree_index vp9_mv_class0_tree[];
extern const vp9_tree_index vp9_mv_fp_tree[];
typedef struct {
vp9_prob sign;
vp9_prob classes[MV_CLASSES - 1];
vp9_prob class0[CLASS0_SIZE - 1];
vp9_prob bits[MV_OFFSET_BITS];
vp9_prob class0_fp[CLASS0_SIZE][MV_FP_SIZE - 1];
vp9_prob fp[MV_FP_SIZE - 1];
vp9_prob class0_hp;
vp9_prob hp;
} nmv_component;
typedef struct {
vp9_prob joints[MV_JOINTS - 1];
nmv_component comps[2];
} nmv_context;
static INLINE MV_JOINT_TYPE vp9_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 vp9_get_mv_class(int z, int *offset);
int vp9_get_mv_mag(MV_CLASS_TYPE c, 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 vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VP9_COMMON_VP9_ENTROPYMV_H_
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