media/libvpx/vp8/common/entropymode.c@ac0c01689b40
media/libvpx/vp8/common/entropymode.c
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
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 */
11 #define USE_PREBUILT_TABLES
13 #include "entropymode.h"
14 #include "entropy.h"
15 #include "vpx_mem/vpx_mem.h"
17 #include "vp8_entropymodedata.h"
19 int vp8_mv_cont(const int_mv *l, const int_mv *a)
20 {
21 int lez = (l->as_int == 0);
22 int aez = (a->as_int == 0);
23 int lea = (l->as_int == a->as_int);
25 if (lea && lez)
26 return SUBMVREF_LEFT_ABOVE_ZED;
28 if (lea)
29 return SUBMVREF_LEFT_ABOVE_SAME;
31 if (aez)
32 return SUBMVREF_ABOVE_ZED;
34 if (lez)
35 return SUBMVREF_LEFT_ZED;
37 return SUBMVREF_NORMAL;
38 }
40 static const vp8_prob sub_mv_ref_prob [VP8_SUBMVREFS-1] = { 180, 162, 25};
42 const vp8_prob vp8_sub_mv_ref_prob2 [SUBMVREF_COUNT][VP8_SUBMVREFS-1] =
43 {
44 { 147, 136, 18 },
45 { 106, 145, 1 },
46 { 179, 121, 1 },
47 { 223, 1 , 34 },
48 { 208, 1 , 1 }
49 };
53 const vp8_mbsplit vp8_mbsplits [VP8_NUMMBSPLITS] =
54 {
55 {
56 0, 0, 0, 0,
57 0, 0, 0, 0,
58 1, 1, 1, 1,
59 1, 1, 1, 1,
60 },
61 {
62 0, 0, 1, 1,
63 0, 0, 1, 1,
64 0, 0, 1, 1,
65 0, 0, 1, 1,
66 },
67 {
68 0, 0, 1, 1,
69 0, 0, 1, 1,
70 2, 2, 3, 3,
71 2, 2, 3, 3,
72 },
73 {
74 0, 1, 2, 3,
75 4, 5, 6, 7,
76 8, 9, 10, 11,
77 12, 13, 14, 15,
78 }
79 };
81 const int vp8_mbsplit_count [VP8_NUMMBSPLITS] = { 2, 2, 4, 16};
83 const vp8_prob vp8_mbsplit_probs [VP8_NUMMBSPLITS-1] = { 110, 111, 150};
86 /* Array indices are identical to previously-existing INTRAMODECONTEXTNODES. */
88 const vp8_tree_index vp8_bmode_tree[18] = /* INTRAMODECONTEXTNODE value */
89 {
90 -B_DC_PRED, 2, /* 0 = DC_NODE */
91 -B_TM_PRED, 4, /* 1 = TM_NODE */
92 -B_VE_PRED, 6, /* 2 = VE_NODE */
93 8, 12, /* 3 = COM_NODE */
94 -B_HE_PRED, 10, /* 4 = HE_NODE */
95 -B_RD_PRED, -B_VR_PRED, /* 5 = RD_NODE */
96 -B_LD_PRED, 14, /* 6 = LD_NODE */
97 -B_VL_PRED, 16, /* 7 = VL_NODE */
98 -B_HD_PRED, -B_HU_PRED /* 8 = HD_NODE */
99 };
101 /* Again, these trees use the same probability indices as their
102 explicitly-programmed predecessors. */
104 const vp8_tree_index vp8_ymode_tree[8] =
105 {
106 -DC_PRED, 2,
107 4, 6,
108 -V_PRED, -H_PRED,
109 -TM_PRED, -B_PRED
110 };
112 const vp8_tree_index vp8_kf_ymode_tree[8] =
113 {
114 -B_PRED, 2,
115 4, 6,
116 -DC_PRED, -V_PRED,
117 -H_PRED, -TM_PRED
118 };
120 const vp8_tree_index vp8_uv_mode_tree[6] =
121 {
122 -DC_PRED, 2,
123 -V_PRED, 4,
124 -H_PRED, -TM_PRED
125 };
127 const vp8_tree_index vp8_mbsplit_tree[6] =
128 {
129 -3, 2,
130 -2, 4,
131 -0, -1
132 };
134 const vp8_tree_index vp8_mv_ref_tree[8] =
135 {
136 -ZEROMV, 2,
137 -NEARESTMV, 4,
138 -NEARMV, 6,
139 -NEWMV, -SPLITMV
140 };
142 const vp8_tree_index vp8_sub_mv_ref_tree[6] =
143 {
144 -LEFT4X4, 2,
145 -ABOVE4X4, 4,
146 -ZERO4X4, -NEW4X4
147 };
149 const vp8_tree_index vp8_small_mvtree [14] =
150 {
151 2, 8,
152 4, 6,
153 -0, -1,
154 -2, -3,
155 10, 12,
156 -4, -5,
157 -6, -7
158 };
160 void vp8_init_mbmode_probs(VP8_COMMON *x)
161 {
162 vpx_memcpy(x->fc.ymode_prob, vp8_ymode_prob, sizeof(vp8_ymode_prob));
163 vpx_memcpy(x->fc.uv_mode_prob, vp8_uv_mode_prob, sizeof(vp8_uv_mode_prob));
164 vpx_memcpy(x->fc.sub_mv_ref_prob, sub_mv_ref_prob, sizeof(sub_mv_ref_prob));
165 }
167 void vp8_default_bmode_probs(vp8_prob p [VP8_BINTRAMODES-1])
168 {
169 vpx_memcpy(p, vp8_bmode_prob, sizeof(vp8_bmode_prob));
170 }
