michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef VP9_COMMON_VP9_ENTROPYMV_H_
michael@0: #define VP9_COMMON_VP9_ENTROPYMV_H_
michael@0: 
michael@0: #include "vp9/common/vp9_treecoder.h"
michael@0: #include "./vpx_config.h"
michael@0: #include "vp9/common/vp9_blockd.h"
michael@0: 
michael@0: struct VP9Common;
michael@0: 
michael@0: void vp9_entropy_mv_init();
michael@0: void vp9_init_mv_probs(struct VP9Common *cm);
michael@0: 
michael@0: void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);
michael@0: int vp9_use_mv_hp(const MV *ref);
michael@0: 
michael@0: #define NMV_UPDATE_PROB  252
michael@0: 
michael@0: /* Symbols for coding which components are zero jointly */
michael@0: #define MV_JOINTS     4
michael@0: typedef enum {
michael@0:   MV_JOINT_ZERO = 0,             /* Zero vector */
michael@0:   MV_JOINT_HNZVZ = 1,            /* Vert zero, hor nonzero */
michael@0:   MV_JOINT_HZVNZ = 2,            /* Hor zero, vert nonzero */
michael@0:   MV_JOINT_HNZVNZ = 3,           /* Both components nonzero */
michael@0: } MV_JOINT_TYPE;
michael@0: 
michael@0: static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {
michael@0:   return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;
michael@0: }
michael@0: 
michael@0: static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {
michael@0:   return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;
michael@0: }
michael@0: 
michael@0: /* Symbols for coding magnitude class of nonzero components */
michael@0: #define MV_CLASSES     11
michael@0: typedef enum {
michael@0:   MV_CLASS_0 = 0,      /* (0, 2]     integer pel */
michael@0:   MV_CLASS_1 = 1,      /* (2, 4]     integer pel */
michael@0:   MV_CLASS_2 = 2,      /* (4, 8]     integer pel */
michael@0:   MV_CLASS_3 = 3,      /* (8, 16]    integer pel */
michael@0:   MV_CLASS_4 = 4,      /* (16, 32]   integer pel */
michael@0:   MV_CLASS_5 = 5,      /* (32, 64]   integer pel */
michael@0:   MV_CLASS_6 = 6,      /* (64, 128]  integer pel */
michael@0:   MV_CLASS_7 = 7,      /* (128, 256] integer pel */
michael@0:   MV_CLASS_8 = 8,      /* (256, 512] integer pel */
michael@0:   MV_CLASS_9 = 9,      /* (512, 1024] integer pel */
michael@0:   MV_CLASS_10 = 10,    /* (1024,2048] integer pel */
michael@0: } MV_CLASS_TYPE;
michael@0: 
michael@0: #define CLASS0_BITS    1  /* bits at integer precision for class 0 */
michael@0: #define CLASS0_SIZE    (1 << CLASS0_BITS)
michael@0: #define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)
michael@0: 
michael@0: #define MV_MAX_BITS    (MV_CLASSES + CLASS0_BITS + 2)
michael@0: #define MV_MAX         ((1 << MV_MAX_BITS) - 1)
michael@0: #define MV_VALS        ((MV_MAX << 1) + 1)
michael@0: 
michael@0: #define MV_IN_USE_BITS 14
michael@0: #define MV_UPP   ((1 << MV_IN_USE_BITS) - 1)
michael@0: #define MV_LOW   (-(1 << MV_IN_USE_BITS))
michael@0: 
michael@0: extern const vp9_tree_index vp9_mv_joint_tree[TREE_SIZE(MV_JOINTS)];
michael@0: extern struct vp9_token vp9_mv_joint_encodings[MV_JOINTS];
michael@0: 
michael@0: extern const vp9_tree_index vp9_mv_class_tree[TREE_SIZE(MV_CLASSES)];
michael@0: extern struct vp9_token vp9_mv_class_encodings[MV_CLASSES];
michael@0: 
michael@0: extern const vp9_tree_index vp9_mv_class0_tree[TREE_SIZE(CLASS0_SIZE)];
michael@0: extern struct vp9_token vp9_mv_class0_encodings[CLASS0_SIZE];
michael@0: 
michael@0: extern const vp9_tree_index vp9_mv_fp_tree[TREE_SIZE(4)];
michael@0: extern struct vp9_token vp9_mv_fp_encodings[4];
michael@0: 
michael@0: typedef struct {
michael@0:   vp9_prob sign;
michael@0:   vp9_prob classes[MV_CLASSES - 1];
michael@0:   vp9_prob class0[CLASS0_SIZE - 1];
michael@0:   vp9_prob bits[MV_OFFSET_BITS];
michael@0:   vp9_prob class0_fp[CLASS0_SIZE][4 - 1];
michael@0:   vp9_prob fp[4 - 1];
michael@0:   vp9_prob class0_hp;
michael@0:   vp9_prob hp;
michael@0: } nmv_component;
michael@0: 
michael@0: typedef struct {
michael@0:   vp9_prob joints[MV_JOINTS - 1];
michael@0:   nmv_component comps[2];
michael@0: } nmv_context;
michael@0: 
michael@0: static INLINE MV_JOINT_TYPE vp9_get_mv_joint(const MV *mv) {
michael@0:   if (mv->row == 0) {
michael@0:     return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
michael@0:   } else {
michael@0:     return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
michael@0:   }
michael@0: }
michael@0: 
michael@0: MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset);
michael@0: int vp9_get_mv_mag(MV_CLASS_TYPE c, int offset);
michael@0: 
michael@0: 
michael@0: typedef struct {
michael@0:   unsigned int sign[2];
michael@0:   unsigned int classes[MV_CLASSES];
michael@0:   unsigned int class0[CLASS0_SIZE];
michael@0:   unsigned int bits[MV_OFFSET_BITS][2];
michael@0:   unsigned int class0_fp[CLASS0_SIZE][4];
michael@0:   unsigned int fp[4];
michael@0:   unsigned int class0_hp[2];
michael@0:   unsigned int hp[2];
michael@0: } nmv_component_counts;
michael@0: 
michael@0: typedef struct {
michael@0:   unsigned int joints[MV_JOINTS];
michael@0:   nmv_component_counts comps[2];
michael@0: } nmv_context_counts;
michael@0: 
michael@0: void vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx);
michael@0: 
michael@0: #endif  // VP9_COMMON_VP9_ENTROPYMV_H_