The Tor Browser: media/libvpx/vp9/common/vp9

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.

     3  *

     4  *  Use of this source code is governed by a BSD-style license

     5  *  that can be found in the LICENSE file in the root of the source

     6  *  tree. An additional intellectual property rights grant can be found

     7  *  in the file PATENTS.  All contributing project authors may

     8  *  be found in the AUTHORS file in the root of the source tree.

     9  */

    12 #ifndef VP9_COMMON_VP9_ENTROPYMV_H_

    13 #define VP9_COMMON_VP9_ENTROPYMV_H_

    15 #include "vp9/common/vp9_treecoder.h"

    16 #include "./vpx_config.h"

    17 #include "vp9/common/vp9_blockd.h"

    19 struct VP9Common;

    21 void vp9_entropy_mv_init();

    22 void vp9_init_mv_probs(struct VP9Common *cm);

    24 void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);

    25 int vp9_use_mv_hp(const MV *ref);

    27 #define NMV_UPDATE_PROB  252

    29 /* Symbols for coding which components are zero jointly */

    30 #define MV_JOINTS     4

    31 typedef enum {

    32   MV_JOINT_ZERO = 0,             /* Zero vector */

    33   MV_JOINT_HNZVZ = 1,            /* Vert zero, hor nonzero */

    34   MV_JOINT_HZVNZ = 2,            /* Hor zero, vert nonzero */

    35   MV_JOINT_HNZVNZ = 3,           /* Both components nonzero */

    36 } MV_JOINT_TYPE;

    38 static INLINE int mv_joint_vertical(MV_JOINT_TYPE type) {

    39   return type == MV_JOINT_HZVNZ || type == MV_JOINT_HNZVNZ;

    40 }

    42 static INLINE int mv_joint_horizontal(MV_JOINT_TYPE type) {

    43   return type == MV_JOINT_HNZVZ || type == MV_JOINT_HNZVNZ;

    44 }

    46 /* Symbols for coding magnitude class of nonzero components */

    47 #define MV_CLASSES     11

    48 typedef enum {

    49   MV_CLASS_0 = 0,      /* (0, 2]     integer pel */

    50   MV_CLASS_1 = 1,      /* (2, 4]     integer pel */

    51   MV_CLASS_2 = 2,      /* (4, 8]     integer pel */

    52   MV_CLASS_3 = 3,      /* (8, 16]    integer pel */

    53   MV_CLASS_4 = 4,      /* (16, 32]   integer pel */

    54   MV_CLASS_5 = 5,      /* (32, 64]   integer pel */

    55   MV_CLASS_6 = 6,      /* (64, 128]  integer pel */

    56   MV_CLASS_7 = 7,      /* (128, 256] integer pel */

    57   MV_CLASS_8 = 8,      /* (256, 512] integer pel */

    58   MV_CLASS_9 = 9,      /* (512, 1024] integer pel */

    59   MV_CLASS_10 = 10,    /* (1024,2048] integer pel */

    60 } MV_CLASS_TYPE;

    62 #define CLASS0_BITS    1  /* bits at integer precision for class 0 */

    63 #define CLASS0_SIZE    (1 << CLASS0_BITS)

    64 #define MV_OFFSET_BITS (MV_CLASSES + CLASS0_BITS - 2)

    66 #define MV_MAX_BITS    (MV_CLASSES + CLASS0_BITS + 2)

    67 #define MV_MAX         ((1 << MV_MAX_BITS) - 1)

    68 #define MV_VALS        ((MV_MAX << 1) + 1)

    70 #define MV_IN_USE_BITS 14

    71 #define MV_UPP   ((1 << MV_IN_USE_BITS) - 1)

    72 #define MV_LOW   (-(1 << MV_IN_USE_BITS))

    74 extern const vp9_tree_index vp9_mv_joint_tree[TREE_SIZE(MV_JOINTS)];

    75 extern struct vp9_token vp9_mv_joint_encodings[MV_JOINTS];

    77 extern const vp9_tree_index vp9_mv_class_tree[TREE_SIZE(MV_CLASSES)];

    78 extern struct vp9_token vp9_mv_class_encodings[MV_CLASSES];

    80 extern const vp9_tree_index vp9_mv_class0_tree[TREE_SIZE(CLASS0_SIZE)];

    81 extern struct vp9_token vp9_mv_class0_encodings[CLASS0_SIZE];

    83 extern const vp9_tree_index vp9_mv_fp_tree[TREE_SIZE(4)];

    84 extern struct vp9_token vp9_mv_fp_encodings[4];

    86 typedef struct {

    87   vp9_prob sign;

    88   vp9_prob classes[MV_CLASSES - 1];

    89   vp9_prob class0[CLASS0_SIZE - 1];

    90   vp9_prob bits[MV_OFFSET_BITS];

    91   vp9_prob class0_fp[CLASS0_SIZE][4 - 1];

    92   vp9_prob fp[4 - 1];

    93   vp9_prob class0_hp;

    94   vp9_prob hp;

    95 } nmv_component;

    97 typedef struct {

    98   vp9_prob joints[MV_JOINTS - 1];

    99   nmv_component comps[2];

   100 } nmv_context;

   102 static INLINE MV_JOINT_TYPE vp9_get_mv_joint(const MV *mv) {

   103   if (mv->row == 0) {

   104     return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;

   105   } else {

   106     return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;

   107   }

   108 }

   110 MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset);

   111 int vp9_get_mv_mag(MV_CLASS_TYPE c, int offset);

   114 typedef struct {

   115   unsigned int sign[2];

   116   unsigned int classes[MV_CLASSES];

   117   unsigned int class0[CLASS0_SIZE];

   118   unsigned int bits[MV_OFFSET_BITS][2];

   119   unsigned int class0_fp[CLASS0_SIZE][4];

   120   unsigned int fp[4];

   121   unsigned int class0_hp[2];

   122   unsigned int hp[2];

   123 } nmv_component_counts;

   125 typedef struct {

   126   unsigned int joints[MV_JOINTS];

   127   nmv_component_counts comps[2];

   128 } nmv_context_counts;

   130 void vp9_inc_mv(const MV *mv, nmv_context_counts *mvctx);

   132 #endif  // VP9_COMMON_VP9_ENTROPYMV_H_

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