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ffmpeg / libavcodec / h264_cabac.c @ 2912e87a

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1
/*
2
 * H.26L/H.264/AVC/JVT/14496-10/... cabac decoding
3
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4
 *
5
 * This file is part of Libav.
6
 *
7
 * Libav is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
/**
23
 * @file
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 * H.264 / AVC / MPEG4 part10 cabac decoding.
25
 * @author Michael Niedermayer <michaelni@gmx.at>
26
 */
27

    
28
#define CABAC 1
29

    
30
#include "internal.h"
31
#include "dsputil.h"
32
#include "avcodec.h"
33
#include "h264.h"
34
#include "h264data.h"
35
#include "h264_mvpred.h"
36
#include "golomb.h"
37

    
38
#include "cabac.h"
39
#if ARCH_X86
40
#include "x86/h264_i386.h"
41
#endif
42

    
43
//#undef NDEBUG
44
#include <assert.h>
45

    
46
/* Cabac pre state table */
47

    
48
static const int8_t cabac_context_init_I[460][2] =
49
{
50
    /* 0 - 10 */
51
    { 20, -15 }, {  2, 54 },  {  3,  74 }, { 20, -15 },
52
    {  2,  54 }, {  3, 74 },  { -28,127 }, { -23, 104 },
53
    { -6,  53 }, { -1, 54 },  {  7,  51 },
54

    
55
    /* 11 - 23 unsused for I */
56
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
57
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
58
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
59
    { 0, 0 },
60

    
61
    /* 24- 39 */
62
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
63
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
64
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
65
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
66

    
67
    /* 40 - 53 */
68
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
69
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
70
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
71
    { 0, 0 },    { 0, 0 },
72

    
73
    /* 54 - 59 */
74
    { 0, 0 },    { 0, 0 },    { 0, 0 },      { 0, 0 },
75
    { 0, 0 },    { 0, 0 },
76

    
77
    /* 60 - 69 */
78
    { 0, 41 },   { 0, 63 },   { 0, 63 },     { 0, 63 },
79
    { -9, 83 },  { 4, 86 },   { 0, 97 },     { -7, 72 },
80
    { 13, 41 },  { 3, 62 },
81

    
82
    /* 70 -> 87 */
83
    { 0, 11 },   { 1, 55 },   { 0, 69 },     { -17, 127 },
84
    { -13, 102 },{ 0, 82 },   { -7, 74 },    { -21, 107 },
85
    { -27, 127 },{ -31, 127 },{ -24, 127 },  { -18, 95 },
86
    { -27, 127 },{ -21, 114 },{ -30, 127 },  { -17, 123 },
87
    { -12, 115 },{ -16, 122 },
88

    
89
    /* 88 -> 104 */
90
    { -11, 115 },{ -12, 63 }, { -2, 68 },    { -15, 84 },
91
    { -13, 104 },{ -3, 70 },  { -8, 93 },    { -10, 90 },
92
    { -30, 127 },{ -1, 74 },  { -6, 97 },    { -7, 91 },
93
    { -20, 127 },{ -4, 56 },  { -5, 82 },    { -7, 76 },
94
    { -22, 125 },
95

    
96
    /* 105 -> 135 */
97
    { -7, 93 },  { -11, 87 }, { -3, 77 },    { -5, 71 },
98
    { -4, 63 },  { -4, 68 },  { -12, 84 },   { -7, 62 },
99
    { -7, 65 },  { 8, 61 },   { 5, 56 },     { -2, 66 },
100
    { 1, 64 },   { 0, 61 },   { -2, 78 },    { 1, 50 },
101
    { 7, 52 },   { 10, 35 },  { 0, 44 },     { 11, 38 },
102
    { 1, 45 },   { 0, 46 },   { 5, 44 },     { 31, 17 },
103
    { 1, 51 },   { 7, 50 },   { 28, 19 },    { 16, 33 },
104
    { 14, 62 },  { -13, 108 },{ -15, 100 },
105

    
106
    /* 136 -> 165 */
107
    { -13, 101 },{ -13, 91 }, { -12, 94 },   { -10, 88 },
108
    { -16, 84 }, { -10, 86 }, { -7, 83 },    { -13, 87 },
109
    { -19, 94 }, { 1, 70 },   { 0, 72 },     { -5, 74 },
110
    { 18, 59 },  { -8, 102 }, { -15, 100 },  { 0, 95 },
111
    { -4, 75 },  { 2, 72 },   { -11, 75 },   { -3, 71 },
112
    { 15, 46 },  { -13, 69 }, { 0, 62 },     { 0, 65 },
113
    { 21, 37 },  { -15, 72 }, { 9, 57 },     { 16, 54 },
114
    { 0, 62 },   { 12, 72 },
115

    
116
    /* 166 -> 196 */
117
    { 24, 0 },   { 15, 9 },   { 8, 25 },     { 13, 18 },
118
    { 15, 9 },   { 13, 19 },  { 10, 37 },    { 12, 18 },
119
    { 6, 29 },   { 20, 33 },  { 15, 30 },    { 4, 45 },
120
    { 1, 58 },   { 0, 62 },   { 7, 61 },     { 12, 38 },
121
    { 11, 45 },  { 15, 39 },  { 11, 42 },    { 13, 44 },
122
    { 16, 45 },  { 12, 41 },  { 10, 49 },    { 30, 34 },
123
    { 18, 42 },  { 10, 55 },  { 17, 51 },    { 17, 46 },
124
    { 0, 89 },   { 26, -19 }, { 22, -17 },
125

    
126
    /* 197 -> 226 */
127
    { 26, -17 }, { 30, -25 }, { 28, -20 },   { 33, -23 },
128
    { 37, -27 }, { 33, -23 }, { 40, -28 },   { 38, -17 },
129
    { 33, -11 }, { 40, -15 }, { 41, -6 },    { 38, 1 },
130
    { 41, 17 },  { 30, -6 },  { 27, 3 },     { 26, 22 },
131
    { 37, -16 }, { 35, -4 },  { 38, -8 },    { 38, -3 },
132
    { 37, 3 },   { 38, 5 },   { 42, 0 },     { 35, 16 },
133
    { 39, 22 },  { 14, 48 },  { 27, 37 },    { 21, 60 },
134
    { 12, 68 },  { 2, 97 },
135

    
136
    /* 227 -> 251 */
137
    { -3, 71 },  { -6, 42 },  { -5, 50 },    { -3, 54 },
138
    { -2, 62 },  { 0, 58 },   { 1, 63 },     { -2, 72 },
139
    { -1, 74 },  { -9, 91 },  { -5, 67 },    { -5, 27 },
140
    { -3, 39 },  { -2, 44 },  { 0, 46 },     { -16, 64 },
141
    { -8, 68 },  { -10, 78 }, { -6, 77 },    { -10, 86 },
142
    { -12, 92 }, { -15, 55 }, { -10, 60 },   { -6, 62 },
143
    { -4, 65 },
144

    
145
    /* 252 -> 275 */
146
    { -12, 73 }, { -8, 76 },  { -7, 80 },    { -9, 88 },
147
    { -17, 110 },{ -11, 97 }, { -20, 84 },   { -11, 79 },
148
    { -6, 73 },  { -4, 74 },  { -13, 86 },   { -13, 96 },
149
    { -11, 97 }, { -19, 117 },{ -8, 78 },    { -5, 33 },
150
    { -4, 48 },  { -2, 53 },  { -3, 62 },    { -13, 71 },
151
    { -10, 79 }, { -12, 86 }, { -13, 90 },   { -14, 97 },
152

    
153
    /* 276 a bit special (not used, bypass is used instead) */
154
    { 0, 0 },
155

    
156
    /* 277 -> 307 */
157
    { -6, 93 },  { -6, 84 },  { -8, 79 },    { 0, 66 },
158
    { -1, 71 },  { 0, 62 },   { -2, 60 },    { -2, 59 },
159
    { -5, 75 },  { -3, 62 },  { -4, 58 },    { -9, 66 },
160
    { -1, 79 },  { 0, 71 },   { 3, 68 },     { 10, 44 },
161
    { -7, 62 },  { 15, 36 },  { 14, 40 },    { 16, 27 },
162
    { 12, 29 },  { 1, 44 },   { 20, 36 },    { 18, 32 },
163
    { 5, 42 },   { 1, 48 },   { 10, 62 },    { 17, 46 },
164
    { 9, 64 },   { -12, 104 },{ -11, 97 },
165

    
166
    /* 308 -> 337 */
167
    { -16, 96 }, { -7, 88 },  { -8, 85 },    { -7, 85 },
168
    { -9, 85 },  { -13, 88 }, { 4, 66 },     { -3, 77 },
169
    { -3, 76 },  { -6, 76 },  { 10, 58 },    { -1, 76 },
170
    { -1, 83 },  { -7, 99 },  { -14, 95 },   { 2, 95 },
171
    { 0, 76 },   { -5, 74 },  { 0, 70 },     { -11, 75 },
172
    { 1, 68 },   { 0, 65 },   { -14, 73 },   { 3, 62 },
173
    { 4, 62 },   { -1, 68 },  { -13, 75 },   { 11, 55 },
174
    { 5, 64 },   { 12, 70 },
175

    
176
    /* 338 -> 368 */
177
    { 15, 6 },   { 6, 19 },   { 7, 16 },     { 12, 14 },
178
    { 18, 13 },  { 13, 11 },  { 13, 15 },    { 15, 16 },
179
    { 12, 23 },  { 13, 23 },  { 15, 20 },    { 14, 26 },
180
    { 14, 44 },  { 17, 40 },  { 17, 47 },    { 24, 17 },
181
    { 21, 21 },  { 25, 22 },  { 31, 27 },    { 22, 29 },
182
    { 19, 35 },  { 14, 50 },  { 10, 57 },    { 7, 63 },
183
    { -2, 77 },  { -4, 82 },  { -3, 94 },    { 9, 69 },
184
    { -12, 109 },{ 36, -35 }, { 36, -34 },
185

    
186
    /* 369 -> 398 */
187
    { 32, -26 }, { 37, -30 }, { 44, -32 },   { 34, -18 },
188
    { 34, -15 }, { 40, -15 }, { 33, -7 },    { 35, -5 },
189
    { 33, 0 },   { 38, 2 },   { 33, 13 },    { 23, 35 },
190
    { 13, 58 },  { 29, -3 },  { 26, 0 },     { 22, 30 },
191
    { 31, -7 },  { 35, -15 }, { 34, -3 },    { 34, 3 },
192
    { 36, -1 },  { 34, 5 },   { 32, 11 },    { 35, 5 },
193
    { 34, 12 },  { 39, 11 },  { 30, 29 },    { 34, 26 },
194
    { 29, 39 },  { 19, 66 },
195

    
196
    /* 399 -> 435 */
197
    {  31,  21 }, {  31,  31 }, {  25,  50 },
198
    { -17, 120 }, { -20, 112 }, { -18, 114 }, { -11,  85 },
199
    { -15,  92 }, { -14,  89 }, { -26,  71 }, { -15,  81 },
200
    { -14,  80 }, {   0,  68 }, { -14,  70 }, { -24,  56 },
201
    { -23,  68 }, { -24,  50 }, { -11,  74 }, {  23, -13 },
202
    {  26, -13 }, {  40, -15 }, {  49, -14 }, {  44,   3 },
203
    {  45,   6 }, {  44,  34 }, {  33,  54 }, {  19,  82 },
204
    {  -3,  75 }, {  -1,  23 }, {   1,  34 }, {   1,  43 },
205
    {   0,  54 }, {  -2,  55 }, {   0,  61 }, {   1,  64 },
206
    {   0,  68 }, {  -9,  92 },
207

    
208
    /* 436 -> 459 */
209
    { -14, 106 }, { -13,  97 }, { -15,  90 }, { -12,  90 },
210
    { -18,  88 }, { -10,  73 }, {  -9,  79 }, { -14,  86 },
211
    { -10,  73 }, { -10,  70 }, { -10,  69 }, {  -5,  66 },
212
    {  -9,  64 }, {  -5,  58 }, {   2,  59 }, {  21, -10 },
213
    {  24, -11 }, {  28,  -8 }, {  28,  -1 }, {  29,   3 },
214
    {  29,   9 }, {  35,  20 }, {  29,  36 }, {  14,  67 }
215
};
216

    
217
static const int8_t cabac_context_init_PB[3][460][2] =
218
{
219
    /* i_cabac_init_idc == 0 */
220
    {
221
        /* 0 - 10 */
222
        {  20, -15 }, {   2,  54 }, {   3,  74 }, {  20, -15 },
223
        {   2,  54 }, {   3,  74 }, { -28, 127 }, { -23, 104 },
224
        {  -6,  53 }, {  -1,  54 }, {   7,  51 },
225

    
226
        /* 11 - 23 */
227
        {  23,  33 }, {  23,   2 }, {  21,   0 }, {   1,   9 },
228
        {   0,  49 }, { -37, 118 }, {   5,  57 }, { -13,  78 },
229
        { -11,  65 }, {   1,  62 }, {  12,  49 }, {  -4,  73 },
230
        {  17,  50 },
231

    
232
        /* 24 - 39 */
233
        {  18,  64 }, {   9,  43 }, {  29,   0 }, {  26,  67 },
234
        {  16,  90 }, {   9, 104 }, { -46, 127 }, { -20, 104 },
235
        {   1,  67 }, { -13,  78 }, { -11,  65 }, {   1,  62 },
236
        {  -6,  86 }, { -17,  95 }, {  -6,  61 }, {   9,  45 },
237

    
238
        /* 40 - 53 */
239
        {  -3,  69 }, {  -6,  81 }, { -11,  96 }, {   6,  55 },
240
        {   7,  67 }, {  -5,  86 }, {   2,  88 }, {   0,  58 },
241
        {  -3,  76 }, { -10,  94 }, {   5,  54 }, {   4,  69 },
242
        {  -3,  81 }, {   0,  88 },
243

    
244
        /* 54 - 59 */
245
        {  -7,  67 }, {  -5,  74 }, {  -4,  74 }, {  -5,  80 },
246
        {  -7,  72 }, {   1,  58 },
247

    
248
        /* 60 - 69 */
249
        {   0,  41 }, {   0,  63 }, {   0,  63 }, { 0, 63 },
250
        {  -9,  83 }, {   4,  86 }, {   0,  97 }, { -7, 72 },
251
        {  13,  41 }, {   3,  62 },
252

    
253
        /* 70 - 87 */
254
        {   0,  45 }, {  -4,  78 }, {  -3,  96 }, { -27,  126 },
255
        { -28,  98 }, { -25, 101 }, { -23,  67 }, { -28,  82 },
256
        { -20,  94 }, { -16,  83 }, { -22, 110 }, { -21,  91 },
257
        { -18, 102 }, { -13,  93 }, { -29, 127 }, {  -7,  92 },
258
        {  -5,  89 }, {  -7,  96 }, { -13, 108 }, {  -3,  46 },
259
        {  -1,  65 }, {  -1,  57 }, {  -9,  93 }, {  -3,  74 },
260
        {  -9,  92 }, {  -8,  87 }, { -23, 126 }, {   5,  54 },
261
        {   6,  60 }, {   6,  59 }, {   6,  69 }, {  -1,  48 },
262
        {   0,  68 }, {  -4,  69 }, {  -8,  88 },
263

    
264
        /* 105 -> 165 */
265
        {  -2,  85 }, {  -6,  78 }, {  -1,  75 }, {  -7,  77 },
266
        {   2,  54 }, {   5,  50 }, {  -3,  68 }, {   1,  50 },
267
        {   6,  42 }, {  -4,  81 }, {   1,  63 }, {  -4,  70 },
268
        {   0,  67 }, {   2,  57 }, {  -2,  76 }, {  11,  35 },
269
        {   4,  64 }, {   1,  61 }, {  11,  35 }, {  18,  25 },
270
        {  12,  24 }, {  13,  29 }, {  13,  36 }, { -10,  93 },
271
        {  -7,  73 }, {  -2,  73 }, {  13,  46 }, {   9,  49 },
272
        {  -7, 100 }, {   9,  53 }, {   2,  53 }, {   5,  53 },
273
        {  -2,  61 }, {   0,  56 }, {   0,  56 }, { -13,  63 },
274
        {  -5,  60 }, {  -1,  62 }, {   4,  57 }, {  -6,  69 },
275
        {   4,  57 }, {  14,  39 }, {   4,  51 }, {  13,  68 },
276
        {   3,  64 }, {   1,  61 }, {   9,  63 }, {   7,  50 },
277
        {  16,  39 }, {   5,  44 }, {   4,  52 }, {  11,  48 },
278
        {  -5,  60 }, {  -1,  59 }, {   0,  59 }, {  22,  33 },
279
        {   5,  44 }, {  14,  43 }, {  -1,  78 }, {   0,  60 },
280
        {   9,  69 },
281

    
282
        /* 166 - 226 */
283
        {  11,  28 }, {   2,  40 }, {   3,  44 }, {   0,  49 },
284
        {   0,  46 }, {   2,  44 }, {   2,  51 }, {   0,  47 },
285
        {   4,  39 }, {   2,  62 }, {   6,  46 }, {   0,  54 },
286
        {   3,  54 }, {   2,  58 }, {   4,  63 }, {   6,  51 },
287
        {   6,  57 }, {   7,  53 }, {   6,  52 }, {   6,  55 },
288
        {  11,  45 }, {  14,  36 }, {   8,  53 }, {  -1,  82 },
289
        {   7,  55 }, {  -3,  78 }, {  15,  46 }, {  22,  31 },
290
        {  -1,  84 }, {  25,   7 }, {  30,  -7 }, {  28,   3 },
291
        {  28,   4 }, {  32,   0 }, {  34,  -1 }, {  30,   6 },
292
        {  30,   6 }, {  32,   9 }, {  31,  19 }, {  26,  27 },
293
        {  26,  30 }, {  37,  20 }, {  28,  34 }, {  17,  70 },
294
        {   1,  67 }, {   5,  59 }, {   9,  67 }, {  16,  30 },
295
        {  18,  32 }, {  18,  35 }, {  22,  29 }, {  24,  31 },
296
        {  23,  38 }, {  18,  43 }, {  20,  41 }, {  11,  63 },
297
        {   9,  59 }, {   9,  64 }, {  -1,  94 }, {  -2,  89 },
298
        {  -9, 108 },
299

    
300
        /* 227 - 275 */
301
        {  -6,  76 }, {  -2,  44 }, {   0,  45 }, {   0,  52 },
302
        {  -3,  64 }, {  -2,  59 }, {  -4,  70 }, {  -4,  75 },
303
        {  -8,  82 }, { -17, 102 }, {  -9,  77 }, {   3,  24 },
304
        {   0,  42 }, {   0,  48 }, {   0,  55 }, {  -6,  59 },
305
        {  -7,  71 }, { -12,  83 }, { -11,  87 }, { -30, 119 },
306
        {   1,  58 }, {  -3,  29 }, {  -1,  36 }, {   1,  38 },
307
        {   2,  43 }, {  -6,  55 }, {   0,  58 }, {   0,  64 },
308
        {  -3,  74 }, { -10,  90 }, {   0,  70 }, {  -4,  29 },
309
        {   5,  31 }, {   7,  42 }, {   1,  59 }, {  -2,  58 },
310
        {  -3,  72 }, {  -3,  81 }, { -11,  97 }, {   0,  58 },
311
        {   8,   5 }, {  10,  14 }, {  14,  18 }, {  13,  27 },
312
        {   2,  40 }, {   0,  58 }, {  -3,  70 }, {  -6,  79 },
313
        {  -8,  85 },
314

    
315
        /* 276 a bit special (not used, bypass is used instead) */
316
        { 0, 0 },
317

    
318
        /* 277 - 337 */
319
        { -13, 106 }, { -16, 106 }, { -10,  87 }, { -21, 114 },
320
        { -18, 110 }, { -14,  98 }, { -22, 110 }, { -21, 106 },
321
        { -18, 103 }, { -21, 107 }, { -23, 108 }, { -26, 112 },
322
        { -10,  96 }, { -12,  95 }, {  -5,  91 }, {  -9,  93 },
323
        { -22,  94 }, {  -5,  86 }, {   9,  67 }, {  -4,  80 },
324
        { -10,  85 }, {  -1,  70 }, {   7,  60 }, {   9,  58 },
325
        {   5,  61 }, {  12,  50 }, {  15,  50 }, {  18,  49 },
326
        {  17,  54 }, {  10,  41 }, {   7,  46 }, {  -1,  51 },
327
        {   7,  49 }, {   8,  52 }, {   9,  41 }, {   6,  47 },
328
        {   2,  55 }, {  13,  41 }, {  10,  44 }, {   6,  50 },
329
        {   5,  53 }, {  13,  49 }, {   4,  63 }, {   6,  64 },
330
        {  -2,  69 }, {  -2,  59 }, {   6,  70 }, {  10,  44 },
331
        {   9,  31 }, {  12,  43 }, {   3,  53 }, {  14,  34 },
332
        {  10,  38 }, {  -3,  52 }, {  13,  40 }, {  17,  32 },
333
        {   7,  44 }, {   7,  38 }, {  13,  50 }, {  10,  57 },
334
        {  26,  43 },
335

    
336
        /* 338 - 398 */
337
        {  14,  11 }, {  11,  14 }, {   9,  11 }, {  18,  11 },
338
        {  21,   9 }, {  23,  -2 }, {  32, -15 }, {  32, -15 },
339
        {  34, -21 }, {  39, -23 }, {  42, -33 }, {  41, -31 },
340
        {  46, -28 }, {  38, -12 }, {  21,  29 }, {  45, -24 },
341
        {  53, -45 }, {  48, -26 }, {  65, -43 }, {  43, -19 },
342
        {  39, -10 }, {  30,   9 }, {  18,  26 }, {  20,  27 },
343
        {   0,  57 }, { -14,  82 }, {  -5,  75 }, { -19,  97 },
344
        { -35, 125 }, {  27,   0 }, {  28,   0 }, {  31,  -4 },
345
        {  27,   6 }, {  34,   8 }, {  30,  10 }, {  24,  22 },
346
        {  33,  19 }, {  22,  32 }, {  26,  31 }, {  21,  41 },
347
        {  26,  44 }, {  23,  47 }, {  16,  65 }, {  14,  71 },
348
        {   8,  60 }, {   6,  63 }, {  17,  65 }, {  21,  24 },
349
        {  23,  20 }, {  26,  23 }, {  27,  32 }, {  28,  23 },
350
        {  28,  24 }, {  23,  40 }, {  24,  32 }, {  28,  29 },
351
        {  23,  42 }, {  19,  57 }, {  22,  53 }, {  22,  61 },
352
        {  11,  86 },
353

    
354
        /* 399 - 435 */
355
        {  12,  40 }, {  11,  51 }, {  14,  59 },
356
        {  -4,  79 }, {  -7,  71 }, {  -5,  69 }, {  -9,  70 },
357
        {  -8,  66 }, { -10,  68 }, { -19,  73 }, { -12,  69 },
358
        { -16,  70 }, { -15,  67 }, { -20,  62 }, { -19,  70 },
359
        { -16,  66 }, { -22,  65 }, { -20,  63 }, {   9,  -2 },
360
        {  26,  -9 }, {  33,  -9 }, {  39,  -7 }, {  41,  -2 },
361
        {  45,   3 }, {  49,   9 }, {  45,  27 }, {  36,  59 },
362
        {  -6,  66 }, {  -7,  35 }, {  -7,  42 }, {  -8,  45 },
363
        {  -5,  48 }, { -12,  56 }, {  -6,  60 }, {  -5,  62 },
364
        {  -8,  66 }, {  -8,  76 },
365

    
366
        /* 436 - 459 */
367
        {  -5,  85 }, {  -6,  81 }, { -10,  77 }, {  -7,  81 },
368
        { -17,  80 }, { -18,  73 }, {  -4,  74 }, { -10,  83 },
369
        {  -9,  71 }, {  -9,  67 }, {  -1,  61 }, {  -8,  66 },
370
        { -14,  66 }, {   0,  59 }, {   2,  59 }, {  21, -13 },
371
        {  33, -14 }, {  39,  -7 }, {  46,  -2 }, {  51,   2 },
372
        {  60,   6 }, {  61,  17 }, {  55,  34 }, {  42,  62 },
373
    },
374

    
375
    /* i_cabac_init_idc == 1 */
376
    {
377
        /* 0 - 10 */
378
        {  20, -15 }, {   2,  54 }, {   3,  74 }, {  20, -15 },
379
        {   2,  54 }, {   3,  74 }, { -28, 127 }, { -23, 104 },
380
        {  -6,  53 }, {  -1,  54 }, {   7,  51 },
381

    
382
        /* 11 - 23 */
383
        {  22,  25 }, {  34,   0 }, {  16,   0 }, {  -2,   9 },
384
        {   4,  41 }, { -29, 118 }, {   2,  65 }, {  -6,  71 },
385
        { -13,  79 }, {   5,  52 }, {   9,  50 }, {  -3,  70 },
386
        {  10,  54 },
387

    
388
        /* 24 - 39 */
389
        {  26,  34 }, {  19,  22 }, {  40,   0 }, {  57,   2 },
390
        {  41,  36 }, {  26,  69 }, { -45, 127 }, { -15, 101 },
391
        {  -4,  76 }, {  -6,  71 }, { -13,  79 }, {   5,  52 },
392
        {   6,  69 }, { -13,  90 }, {   0,  52 }, {   8,  43 },
393

    
394
        /* 40 - 53 */
395
        {  -2,  69 },{  -5,  82 },{ -10,  96 },{   2,  59 },
396
        {   2,  75 },{  -3,  87 },{  -3,  100 },{   1,  56 },
397
        {  -3,  74 },{  -6,  85 },{   0,  59 },{  -3,  81 },
398
        {  -7,  86 },{  -5,  95 },
399

    
400
        /* 54 - 59 */
401
        {  -1,  66 },{  -1,  77 },{   1,  70 },{  -2,  86 },
402
        {  -5,  72 },{   0,  61 },
403

    
404
        /* 60 - 69 */
405
        { 0, 41 },   { 0, 63 },   { 0, 63 },     { 0, 63 },
406
        { -9, 83 },  { 4, 86 },   { 0, 97 },     { -7, 72 },
407
        { 13, 41 },  { 3, 62 },
408

    
409
        /* 70 - 104 */
410
        {  13,  15 }, {   7,  51 }, {   2,  80 }, { -39, 127 },
411
        { -18,  91 }, { -17,  96 }, { -26,  81 }, { -35,  98 },
412
        { -24, 102 }, { -23,  97 }, { -27, 119 }, { -24,  99 },
413
        { -21, 110 }, { -18, 102 }, { -36, 127 }, {   0,  80 },
414
        {  -5,  89 }, {  -7,  94 }, {  -4,  92 }, {   0,  39 },
415
        {   0,  65 }, { -15,  84 }, { -35, 127 }, {  -2,  73 },
416
        { -12, 104 }, {  -9,  91 }, { -31, 127 }, {   3,  55 },
417
        {   7,  56 }, {   7,  55 }, {   8,  61 }, {  -3,  53 },
418
        {   0,  68 }, {  -7,  74 }, {  -9,  88 },
419

    
420
        /* 105 -> 165 */
421
        { -13, 103 }, { -13,  91 }, {  -9,  89 }, { -14,  92 },
422
        {  -8,  76 }, { -12,  87 }, { -23, 110 }, { -24, 105 },
423
        { -10,  78 }, { -20, 112 }, { -17,  99 }, { -78, 127 },
424
        { -70, 127 }, { -50, 127 }, { -46, 127 }, {  -4,  66 },
425
        {  -5,  78 }, {  -4,  71 }, {  -8,  72 }, {   2,  59 },
426
        {  -1,  55 }, {  -7,  70 }, {  -6,  75 }, {  -8,  89 },
427
        { -34, 119 }, {  -3,  75 }, {  32,  20 }, {  30,  22 },
428
        { -44, 127 }, {   0,  54 }, {  -5,  61 }, {   0,  58 },
429
        {  -1,  60 }, {  -3,  61 }, {  -8,  67 }, { -25,  84 },
430
        { -14,  74 }, {  -5,  65 }, {   5,  52 }, {   2,  57 },
431
        {   0,  61 }, {  -9,  69 }, { -11,  70 }, {  18,  55 },
432
        {  -4,  71 }, {   0,  58 }, {   7,  61 }, {   9,  41 },
433
        {  18,  25 }, {   9,  32 }, {   5,  43 }, {   9,  47 },
434
        {   0,  44 }, {   0,  51 }, {   2,  46 }, {  19,  38 },
435
        {  -4,  66 }, {  15,  38 }, {  12,  42 }, {   9,  34 },
436
        {   0,  89 },
437

    
438
        /* 166 - 226 */
439
        {   4,  45 }, {  10,  28 }, {  10,  31 }, {  33, -11 },
440
        {  52, -43 }, {  18,  15 }, {  28,   0 }, {  35, -22 },
441
        {  38, -25 }, {  34,   0 }, {  39, -18 }, {  32, -12 },
442
        { 102, -94 }, {   0,   0 }, {  56, -15 }, {  33,  -4 },
443
        {  29,  10 }, {  37,  -5 }, {  51, -29 }, {  39,  -9 },
444
        {  52, -34 }, {  69, -58 }, {  67, -63 }, {  44,  -5 },
445
        {  32,   7 }, {  55, -29 }, {  32,   1 }, {   0,   0 },
446
        {  27,  36 }, {  33, -25 }, {  34, -30 }, {  36, -28 },
447
        {  38, -28 }, {  38, -27 }, {  34, -18 }, {  35, -16 },
448
        {  34, -14 }, {  32,  -8 }, {  37,  -6 }, {  35,   0 },
449
        {  30,  10 }, {  28,  18 }, {  26,  25 }, {  29,  41 },
450
        {   0,  75 }, {   2,  72 }, {   8,  77 }, {  14,  35 },
451
        {  18,  31 }, {  17,  35 }, {  21,  30 }, {  17,  45 },
452
        {  20,  42 }, {  18,  45 }, {  27,  26 }, {  16,  54 },
453
        {   7,  66 }, {  16,  56 }, {  11,  73 }, {  10,  67 },
454
        { -10, 116 },
455

    
456
        /* 227 - 275 */
457
        { -23, 112 }, { -15,  71 }, {  -7,  61 }, {   0,  53 },
458
        {  -5,  66 }, { -11,  77 }, {  -9,  80 }, {  -9,  84 },
459
        { -10,  87 }, { -34, 127 }, { -21, 101 }, {  -3,  39 },
460
        {  -5,  53 }, {  -7,  61 }, { -11,  75 }, { -15,  77 },
461
        { -17,  91 }, { -25, 107 }, { -25, 111 }, { -28, 122 },
462
        { -11,  76 }, { -10,  44 }, { -10,  52 }, { -10,  57 },
463
        {  -9,  58 }, { -16,  72 }, {  -7,  69 }, {  -4,  69 },
464
        {  -5,  74 }, {  -9,  86 }, {   2,  66 }, {  -9,  34 },
465
        {   1,  32 }, {  11,  31 }, {   5,  52 }, {  -2,  55 },
466
        {  -2,  67 }, {   0,  73 }, {  -8,  89 }, {   3,  52 },
467
        {   7,   4 }, {  10,   8 }, {  17,   8 }, {  16,  19 },
468
        {   3,  37 }, {  -1,  61 }, {  -5,  73 }, {  -1,  70 },
469
        {  -4,  78 },
470

    
471
        /* 276 a bit special (not used, bypass is used instead) */
472
        { 0, 0 },
473

    
474
        /* 277 - 337 */
475
        { -21, 126 }, { -23, 124 }, { -20, 110 }, { -26, 126 },
476
        { -25, 124 }, { -17, 105 }, { -27, 121 }, { -27, 117 },
477
        { -17, 102 }, { -26, 117 }, { -27, 116 }, { -33, 122 },
478
        { -10,  95 }, { -14, 100 }, {  -8,  95 }, { -17, 111 },
479
        { -28, 114 }, {  -6,  89 }, {  -2,  80 }, {  -4,  82 },
480
        {  -9,  85 }, {  -8,  81 }, {  -1,  72 }, {   5,  64 },
481
        {   1,  67 }, {   9,  56 }, {   0,  69 }, {   1,  69 },
482
        {   7,  69 }, {  -7,  69 }, {  -6,  67 }, { -16,  77 },
483
        {  -2,  64 }, {   2,  61 }, {  -6,  67 }, {  -3,  64 },
484
        {   2,  57 }, {  -3,  65 }, {  -3,  66 }, {   0,  62 },
485
        {   9,  51 }, {  -1,  66 }, {  -2,  71 }, {  -2,  75 },
486
        {  -1,  70 }, {  -9,  72 }, {  14,  60 }, {  16,  37 },
487
        {   0,  47 }, {  18,  35 }, {  11,  37 }, {  12,  41 },
488
        {  10,  41 }, {   2,  48 }, {  12,  41 }, {  13,  41 },
489
        {   0,  59 }, {   3,  50 }, {  19,  40 }, {   3,  66 },
490
        {  18,  50 },
491

    
492
        /* 338 - 398 */
493
        {  19,  -6 }, {  18,  -6 }, {  14,   0 }, {  26, -12 },
494
        {  31, -16 }, {  33, -25 }, {  33, -22 }, {  37, -28 },
495
        {  39, -30 }, {  42, -30 }, {  47, -42 }, {  45, -36 },
496
        {  49, -34 }, {  41, -17 }, {  32,   9 }, {  69, -71 },
497
        {  63, -63 }, {  66, -64 }, {  77, -74 }, {  54, -39 },
498
        {  52, -35 }, {  41, -10 }, {  36,   0 }, {  40,  -1 },
499
        {  30,  14 }, {  28,  26 }, {  23,  37 }, {  12,  55 },
500
        {  11,  65 }, {  37, -33 }, {  39, -36 }, {  40, -37 },
501
        {  38, -30 }, {  46, -33 }, {  42, -30 }, {  40, -24 },
502
        {  49, -29 }, {  38, -12 }, {  40, -10 }, {  38,  -3 },
503
        {  46,  -5 }, {  31,  20 }, {  29,  30 }, {  25,  44 },
504
        {  12,  48 }, {  11,  49 }, {  26,  45 }, {  22,  22 },
505
        {  23,  22 }, {  27,  21 }, {  33,  20 }, {  26,  28 },
506
        {  30,  24 }, {  27,  34 }, {  18,  42 }, {  25,  39 },
507
        {  18,  50 }, {  12,  70 }, {  21,  54 }, {  14,  71 },
508
        {  11,  83 },
509

    
510
        /* 399 - 435 */
511
        {  25,  32 }, {  21,  49 }, {  21,  54 },
512
        {  -5,  85 }, {  -6,  81 }, { -10,  77 }, {  -7,  81 },
513
        { -17,  80 }, { -18,  73 }, {  -4,  74 }, { -10,  83 },
514
        {  -9,  71 }, {  -9,  67 }, {  -1,  61 }, {  -8,  66 },
515
        { -14,  66 }, {   0,  59 }, {   2,  59 }, {  17, -10 },
516
        {  32, -13 }, {  42,  -9 }, {  49,  -5 }, {  53,   0 },
517
        {  64,   3 }, {  68,  10 }, {  66,  27 }, {  47,  57 },
518
        {  -5,  71 }, {   0,  24 }, {  -1,  36 }, {  -2,  42 },
519
        {  -2,  52 }, {  -9,  57 }, {  -6,  63 }, {  -4,  65 },
520
        {  -4,  67 }, {  -7,  82 },
521

    
522
        /* 436 - 459 */
523
        {  -3,  81 }, {  -3,  76 }, {  -7,  72 }, {  -6,  78 },
524
        { -12,  72 }, { -14,  68 }, {  -3,  70 }, {  -6,  76 },
525
        {  -5,  66 }, {  -5,  62 }, {   0,  57 }, {  -4,  61 },
526
        {  -9,  60 }, {   1,  54 }, {   2,  58 }, {  17, -10 },
527
        {  32, -13 }, {  42,  -9 }, {  49,  -5 }, {  53,   0 },
528
        {  64,   3 }, {  68,  10 }, {  66,  27 }, {  47,  57 },
529
    },
530

    
531
    /* i_cabac_init_idc == 2 */
532
    {
533
        /* 0 - 10 */
534
        {  20, -15 }, {   2,  54 }, {   3,  74 }, {  20, -15 },
535
        {   2,  54 }, {   3,  74 }, { -28, 127 }, { -23, 104 },
536
        {  -6,  53 }, {  -1,  54 }, {   7,  51 },
537

    
538
        /* 11 - 23 */
539
        {  29,  16 }, {  25,   0 }, {  14,   0 }, { -10,  51 },
540
        {  -3,  62 }, { -27,  99 }, {  26,  16 }, {  -4,  85 },
541
        { -24, 102 }, {   5,  57 }, {   6,  57 }, { -17,  73 },
542
        {  14,  57 },
543

    
544
        /* 24 - 39 */
545
        {  20,  40 }, {  20,  10 }, {  29,   0 }, {  54,   0 },
546
        {  37,  42 }, {  12,  97 }, { -32, 127 }, { -22, 117 },
547
        {  -2,  74 }, {  -4,  85 }, { -24, 102 }, {   5,  57 },
548
        {  -6,  93 }, { -14,  88 }, {  -6,  44 }, {   4,  55 },
549

    
550
        /* 40 - 53 */
551
        { -11,  89 },{ -15,  103 },{ -21,  116 },{  19,  57 },
552
        {  20,  58 },{   4,  84 },{   6,  96 },{   1,  63 },
553
        {  -5,  85 },{ -13,  106 },{   5,  63 },{   6,  75 },
554
        {  -3,  90 },{  -1,  101 },
555

    
556
        /* 54 - 59 */
557
        {   3,  55 },{  -4,  79 },{  -2,  75 },{ -12,  97 },
558
        {  -7,  50 },{   1,  60 },
559

    
560
        /* 60 - 69 */
561
        { 0, 41 },   { 0, 63 },   { 0, 63 },     { 0, 63 },
562
        { -9, 83 },  { 4, 86 },   { 0, 97 },     { -7, 72 },
563
        { 13, 41 },  { 3, 62 },
564

    
565
        /* 70 - 104 */
566
        {   7,  34 }, {  -9,  88 }, { -20, 127 }, { -36, 127 },
567
        { -17,  91 }, { -14,  95 }, { -25,  84 }, { -25,  86 },
568
        { -12,  89 }, { -17,  91 }, { -31, 127 }, { -14,  76 },
569
        { -18, 103 }, { -13,  90 }, { -37, 127 }, {  11,  80 },
570
        {   5,  76 }, {   2,  84 }, {   5,  78 }, {  -6,  55 },
571
        {   4,  61 }, { -14,  83 }, { -37, 127 }, {  -5,  79 },
572
        { -11, 104 }, { -11,  91 }, { -30, 127 }, {   0,  65 },
573
        {  -2,  79 }, {   0,  72 }, {  -4,  92 }, {  -6,  56 },
574
        {   3,  68 }, {  -8,  71 }, { -13,  98 },
575

    
576
        /* 105 -> 165 */
577
        {  -4,  86 }, { -12,  88 }, {  -5,  82 }, {  -3,  72 },
578
        {  -4,  67 }, {  -8,  72 }, { -16,  89 }, {  -9,  69 },
579
        {  -1,  59 }, {   5,  66 }, {   4,  57 }, {  -4,  71 },
580
        {  -2,  71 }, {   2,  58 }, {  -1,  74 }, {  -4,  44 },
581
        {  -1,  69 }, {   0,  62 }, {  -7,  51 }, {  -4,  47 },
582
        {  -6,  42 }, {  -3,  41 }, {  -6,  53 }, {   8,  76 },
583
        {  -9,  78 }, { -11,  83 }, {   9,  52 }, {   0,  67 },
584
        {  -5,  90 }, {   1,  67 }, { -15,  72 }, {  -5,  75 },
585
        {  -8,  80 }, { -21,  83 }, { -21,  64 }, { -13,  31 },
586
        { -25,  64 }, { -29,  94 }, {   9,  75 }, {  17,  63 },
587
        {  -8,  74 }, {  -5,  35 }, {  -2,  27 }, {  13,  91 },
588
        {   3,  65 }, {  -7,  69 }, {   8,  77 }, { -10,  66 },
589
        {   3,  62 }, {  -3,  68 }, { -20,  81 }, {   0,  30 },
590
        {   1,   7 }, {  -3,  23 }, { -21,  74 }, {  16,  66 },
591
        { -23, 124 }, {  17,  37 }, {  44, -18 }, {  50, -34 },
592
        { -22, 127 },
593

    
594
        /* 166 - 226 */
595
        {   4,  39 }, {   0,  42 }, {   7,  34 }, {  11,  29 },
596
        {   8,  31 }, {   6,  37 }, {   7,  42 }, {   3,  40 },
597
        {   8,  33 }, {  13,  43 }, {  13,  36 }, {   4,  47 },
598
        {   3,  55 }, {   2,  58 }, {   6,  60 }, {   8,  44 },
599
        {  11,  44 }, {  14,  42 }, {   7,  48 }, {   4,  56 },
600
        {   4,  52 }, {  13,  37 }, {   9,  49 }, {  19,  58 },
601
        {  10,  48 }, {  12,  45 }, {   0,  69 }, {  20,  33 },
602
        {   8,  63 }, {  35, -18 }, {  33, -25 }, {  28,  -3 },
603
        {  24,  10 }, {  27,   0 }, {  34, -14 }, {  52, -44 },
604
        {  39, -24 }, {  19,  17 }, {  31,  25 }, {  36,  29 },
605
        {  24,  33 }, {  34,  15 }, {  30,  20 }, {  22,  73 },
606
        {  20,  34 }, {  19,  31 }, {  27,  44 }, {  19,  16 },
607
        {  15,  36 }, {  15,  36 }, {  21,  28 }, {  25,  21 },
608
        {  30,  20 }, {  31,  12 }, {  27,  16 }, {  24,  42 },
609
        {   0,  93 }, {  14,  56 }, {  15,  57 }, {  26,  38 },
610
        { -24, 127 },
611

    
612
        /* 227 - 275 */
613
        { -24, 115 }, { -22,  82 }, {  -9,  62 }, {   0,  53 },
614
        {   0,  59 }, { -14,  85 }, { -13,  89 }, { -13,  94 },
615
        { -11,  92 }, { -29, 127 }, { -21, 100 }, { -14,  57 },
616
        { -12,  67 }, { -11,  71 }, { -10,  77 }, { -21,  85 },
617
        { -16,  88 }, { -23, 104 }, { -15,  98 }, { -37, 127 },
618
        { -10,  82 }, {  -8,  48 }, {  -8,  61 }, {  -8,  66 },
619
        {  -7,  70 }, { -14,  75 }, { -10,  79 }, {  -9,  83 },
620
        { -12,  92 }, { -18, 108 }, {  -4,  79 }, { -22,  69 },
621
        { -16,  75 }, {  -2,  58 }, {   1,  58 }, { -13,  78 },
622
        {  -9,  83 }, {  -4,  81 }, { -13,  99 }, { -13,  81 },
623
        {  -6,  38 }, { -13,  62 }, {  -6,  58 }, {  -2,  59 },
624
        { -16,  73 }, { -10,  76 }, { -13,  86 }, {  -9,  83 },
625
        { -10,  87 },
626

    
627
        /* 276 a bit special (not used, bypass is used instead) */
628
        { 0, 0 },
629

    
630
        /* 277 - 337 */
631
        { -22, 127 }, { -25, 127 }, { -25, 120 }, { -27, 127 },
632
        { -19, 114 }, { -23, 117 }, { -25, 118 }, { -26, 117 },
633
        { -24, 113 }, { -28, 118 }, { -31, 120 }, { -37, 124 },
634
        { -10,  94 }, { -15, 102 }, { -10,  99 }, { -13, 106 },
635
        { -50, 127 }, {  -5,  92 }, {  17,  57 }, {  -5,  86 },
636
        { -13,  94 }, { -12,  91 }, {  -2,  77 }, {   0,  71 },
637
        {  -1,  73 }, {   4,  64 }, {  -7,  81 }, {   5,  64 },
638
        {  15,  57 }, {   1,  67 }, {   0,  68 }, { -10,  67 },
639
        {   1,  68 }, {   0,  77 }, {   2,  64 }, {   0,  68 },
640
        {  -5,  78 }, {   7,  55 }, {   5,  59 }, {   2,  65 },
641
        {  14,  54 }, {  15,  44 }, {   5,  60 }, {   2,  70 },
642
        {  -2,  76 }, { -18,  86 }, {  12,  70 }, {   5,  64 },
643
        { -12,  70 }, {  11,  55 }, {   5,  56 }, {   0,  69 },
644
        {   2,  65 }, {  -6,  74 }, {   5,  54 }, {   7,  54 },
645
        {  -6,  76 }, { -11,  82 }, {  -2,  77 }, {  -2,  77 },
646
        {  25,  42 },
647

    
648
        /* 338 - 398 */
649
        {  17, -13 }, {  16,  -9 }, {  17, -12 }, {  27, -21 },
650
        {  37, -30 }, {  41, -40 }, {  42, -41 }, {  48, -47 },
651
        {  39, -32 }, {  46, -40 }, {  52, -51 }, {  46, -41 },
652
        {  52, -39 }, {  43, -19 }, {  32,  11 }, {  61, -55 },
653
        {  56, -46 }, {  62, -50 }, {  81, -67 }, {  45, -20 },
654
        {  35,  -2 }, {  28,  15 }, {  34,   1 }, {  39,   1 },
655
        {  30,  17 }, {  20,  38 }, {  18,  45 }, {  15,  54 },
656
        {   0,  79 }, {  36, -16 }, {  37, -14 }, {  37, -17 },
657
        {  32,   1 }, {  34,  15 }, {  29,  15 }, {  24,  25 },
658
        {  34,  22 }, {  31,  16 }, {  35,  18 }, {  31,  28 },
659
        {  33,  41 }, {  36,  28 }, {  27,  47 }, {  21,  62 },
660
        {  18,  31 }, {  19,  26 }, {  36,  24 }, {  24,  23 },
661
        {  27,  16 }, {  24,  30 }, {  31,  29 }, {  22,  41 },
662
        {  22,  42 }, {  16,  60 }, {  15,  52 }, {  14,  60 },
663
        {   3,  78 }, { -16, 123 }, {  21,  53 }, {  22,  56 },
664
        {  25,  61 },
665

    
666
        /* 399 - 435 */
667
        {  21,  33 }, {  19,  50 }, {  17,  61 },
668
        {  -3,  78 }, {  -8,  74 }, {  -9,  72 }, { -10,  72 },
669
        { -18,  75 }, { -12,  71 }, { -11,  63 }, {  -5,  70 },
670
        { -17,  75 }, { -14,  72 }, { -16,  67 }, {  -8,  53 },
671
        { -14,  59 }, {  -9,  52 }, { -11,  68 }, {   9,  -2 },
672
        {  30, -10 }, {  31,  -4 }, {  33,  -1 }, {  33,   7 },
673
        {  31,  12 }, {  37,  23 }, {  31,  38 }, {  20,  64 },
674
        {  -9,  71 }, {  -7,  37 }, {  -8,  44 }, { -11,  49 },
675
        { -10,  56 }, { -12,  59 }, {  -8,  63 }, {  -9,  67 },
676
        {  -6,  68 }, { -10,  79 },
677

    
678
        /* 436 - 459 */
679
        {  -3,  78 }, {  -8,  74 }, {  -9,  72 }, { -10,  72 },
680
        { -18,  75 }, { -12,  71 }, { -11,  63 }, {  -5,  70 },
681
        { -17,  75 }, { -14,  72 }, { -16,  67 }, {  -8,  53 },
682
        { -14,  59 }, {  -9,  52 }, { -11,  68 }, {   9,  -2 },
683
        {  30, -10 }, {  31,  -4 }, {  33,  -1 }, {  33,   7 },
684
        {  31,  12 }, {  37,  23 }, {  31,  38 }, {  20,  64 },
685
    }
686
};
687

    
688
void ff_h264_init_cabac_states(H264Context *h) {
689
    MpegEncContext * const s = &h->s;
690
    int i;
691
    const int8_t (*tab)[2];
692

    
693
    if( h->slice_type_nos == FF_I_TYPE ) tab = cabac_context_init_I;
694
    else                                 tab = cabac_context_init_PB[h->cabac_init_idc];
695

    
696
    /* calculate pre-state */
697
    for( i= 0; i < 460; i++ ) {
698
        int pre = 2*(((tab[i][0] * s->qscale) >>4 ) + tab[i][1]) - 127;
699

    
700
        pre^= pre>>31;
701
        if(pre > 124)
702
            pre= 124 + (pre&1);
703

    
704
        h->cabac_state[i] =  pre;
705
    }
706
}
707

    
708
static int decode_cabac_field_decoding_flag(H264Context *h) {
709
    MpegEncContext * const s = &h->s;
710
    const long mbb_xy = h->mb_xy - 2L*s->mb_stride;
711

    
712
    unsigned long ctx = 0;
713

    
714
    ctx += h->mb_field_decoding_flag & !!s->mb_x; //for FMO:(s->current_picture.mb_type[mba_xy]>>7)&(h->slice_table[mba_xy] == h->slice_num);
715
    ctx += (s->current_picture.mb_type[mbb_xy]>>7)&(h->slice_table[mbb_xy] == h->slice_num);
716

    
717
    return get_cabac_noinline( &h->cabac, &(h->cabac_state+70)[ctx] );
718
}
719

    
720
static int decode_cabac_intra_mb_type(H264Context *h, int ctx_base, int intra_slice) {
721
    uint8_t *state= &h->cabac_state[ctx_base];
722
    int mb_type;
723

    
724
    if(intra_slice){
725
        int ctx=0;
726
        if( h->left_type[0] & (MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM))
727
            ctx++;
728
        if( h->top_type     & (MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM))
729
            ctx++;
730
        if( get_cabac_noinline( &h->cabac, &state[ctx] ) == 0 )
731
            return 0;   /* I4x4 */
732
        state += 2;
733
    }else{
734
        if( get_cabac_noinline( &h->cabac, state ) == 0 )
735
            return 0;   /* I4x4 */
736
    }
737

    
738
    if( get_cabac_terminate( &h->cabac ) )
739
        return 25;  /* PCM */
740

    
741
    mb_type = 1; /* I16x16 */
742
    mb_type += 12 * get_cabac_noinline( &h->cabac, &state[1] ); /* cbp_luma != 0 */
743
    if( get_cabac_noinline( &h->cabac, &state[2] ) ) /* cbp_chroma */
744
        mb_type += 4 + 4 * get_cabac_noinline( &h->cabac, &state[2+intra_slice] );
745
    mb_type += 2 * get_cabac_noinline( &h->cabac, &state[3+intra_slice] );
746
    mb_type += 1 * get_cabac_noinline( &h->cabac, &state[3+2*intra_slice] );
747
    return mb_type;
748
}
749

    
750
static int decode_cabac_mb_skip( H264Context *h, int mb_x, int mb_y ) {
751
    MpegEncContext * const s = &h->s;
752
    int mba_xy, mbb_xy;
753
    int ctx = 0;
754

    
755
    if(FRAME_MBAFF){ //FIXME merge with the stuff in fill_caches?
756
        int mb_xy = mb_x + (mb_y&~1)*s->mb_stride;
757
        mba_xy = mb_xy - 1;
758
        if( (mb_y&1)
759
            && h->slice_table[mba_xy] == h->slice_num
760
            && MB_FIELD == !!IS_INTERLACED( s->current_picture.mb_type[mba_xy] ) )
761
            mba_xy += s->mb_stride;
762
        if( MB_FIELD ){
763
            mbb_xy = mb_xy - s->mb_stride;
764
            if( !(mb_y&1)
765
                && h->slice_table[mbb_xy] == h->slice_num
766
                && IS_INTERLACED( s->current_picture.mb_type[mbb_xy] ) )
767
                mbb_xy -= s->mb_stride;
768
        }else
769
            mbb_xy = mb_x + (mb_y-1)*s->mb_stride;
770
    }else{
771
        int mb_xy = h->mb_xy;
772
        mba_xy = mb_xy - 1;
773
        mbb_xy = mb_xy - (s->mb_stride << FIELD_PICTURE);
774
    }
775

    
776
    if( h->slice_table[mba_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mba_xy] ))
777
        ctx++;
778
    if( h->slice_table[mbb_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mbb_xy] ))
779
        ctx++;
780

    
781
    if( h->slice_type_nos == FF_B_TYPE )
782
        ctx += 13;
783
    return get_cabac_noinline( &h->cabac, &h->cabac_state[11+ctx] );
784
}
785

    
786
static int decode_cabac_mb_intra4x4_pred_mode( H264Context *h, int pred_mode ) {
787
    int mode = 0;
788

    
789
    if( get_cabac( &h->cabac, &h->cabac_state[68] ) )
790
        return pred_mode;
791

    
792
    mode += 1 * get_cabac( &h->cabac, &h->cabac_state[69] );
793
    mode += 2 * get_cabac( &h->cabac, &h->cabac_state[69] );
794
    mode += 4 * get_cabac( &h->cabac, &h->cabac_state[69] );
795

    
796
    return mode + ( mode >= pred_mode );
797
}
798

    
799
static int decode_cabac_mb_chroma_pre_mode( H264Context *h) {
800
    const int mba_xy = h->left_mb_xy[0];
801
    const int mbb_xy = h->top_mb_xy;
802

    
803
    int ctx = 0;
804

    
805
    /* No need to test for IS_INTRA4x4 and IS_INTRA16x16, as we set chroma_pred_mode_table to 0 */
806
    if( h->left_type[0] && h->chroma_pred_mode_table[mba_xy] != 0 )
807
        ctx++;
808

    
809
    if( h->top_type     && h->chroma_pred_mode_table[mbb_xy] != 0 )
810
        ctx++;
811

    
812
    if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+ctx] ) == 0 )
813
        return 0;
814

    
815
    if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
816
        return 1;
817
    if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
818
        return 2;
819
    else
820
        return 3;
821
}
822

    
823
static int decode_cabac_mb_cbp_luma( H264Context *h) {
824
    int cbp_b, cbp_a, ctx, cbp = 0;
825

    
826
    cbp_a = h->left_cbp;
827
    cbp_b = h->top_cbp;
828

    
829
    ctx = !(cbp_a & 0x02) + 2 * !(cbp_b & 0x04);
830
    cbp += get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]);
831
    ctx = !(cbp   & 0x01) + 2 * !(cbp_b & 0x08);
832
    cbp += get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 1;
833
    ctx = !(cbp_a & 0x08) + 2 * !(cbp   & 0x01);
834
    cbp += get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 2;
835
    ctx = !(cbp   & 0x04) + 2 * !(cbp   & 0x02);
836
    cbp += get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 3;
837
    return cbp;
838
}
839
static int decode_cabac_mb_cbp_chroma( H264Context *h) {
840
    int ctx;
841
    int cbp_a, cbp_b;
842

    
843
    cbp_a = (h->left_cbp>>4)&0x03;
844
    cbp_b = (h-> top_cbp>>4)&0x03;
845

    
846
    ctx = 0;
847
    if( cbp_a > 0 ) ctx++;
848
    if( cbp_b > 0 ) ctx += 2;
849
    if( get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] ) == 0 )
850
        return 0;
851

    
852
    ctx = 4;
853
    if( cbp_a == 2 ) ctx++;
854
    if( cbp_b == 2 ) ctx += 2;
855
    return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] );
856
}
857

    
858
static int decode_cabac_p_mb_sub_type( H264Context *h ) {
859
    if( get_cabac( &h->cabac, &h->cabac_state[21] ) )
860
        return 0;   /* 8x8 */
861
    if( !get_cabac( &h->cabac, &h->cabac_state[22] ) )
862
        return 1;   /* 8x4 */
863
    if( get_cabac( &h->cabac, &h->cabac_state[23] ) )
864
        return 2;   /* 4x8 */
865
    return 3;       /* 4x4 */
866
}
867
static int decode_cabac_b_mb_sub_type( H264Context *h ) {
868
    int type;
869
    if( !get_cabac( &h->cabac, &h->cabac_state[36] ) )
870
        return 0;   /* B_Direct_8x8 */
871
    if( !get_cabac( &h->cabac, &h->cabac_state[37] ) )
872
        return 1 + get_cabac( &h->cabac, &h->cabac_state[39] ); /* B_L0_8x8, B_L1_8x8 */
873
    type = 3;
874
    if( get_cabac( &h->cabac, &h->cabac_state[38] ) ) {
875
        if( get_cabac( &h->cabac, &h->cabac_state[39] ) )
876
            return 11 + get_cabac( &h->cabac, &h->cabac_state[39] ); /* B_L1_4x4, B_Bi_4x4 */
877
        type += 4;
878
    }
879
    type += 2*get_cabac( &h->cabac, &h->cabac_state[39] );
880
    type +=   get_cabac( &h->cabac, &h->cabac_state[39] );
881
    return type;
882
}
883

    
884
static int decode_cabac_mb_ref( H264Context *h, int list, int n ) {
885
    int refa = h->ref_cache[list][scan8[n] - 1];
886
    int refb = h->ref_cache[list][scan8[n] - 8];
887
    int ref  = 0;
888
    int ctx  = 0;
889

    
890
    if( h->slice_type_nos == FF_B_TYPE) {
891
        if( refa > 0 && !(h->direct_cache[scan8[n] - 1]&(MB_TYPE_DIRECT2>>1)) )
892
            ctx++;
893
        if( refb > 0 && !(h->direct_cache[scan8[n] - 8]&(MB_TYPE_DIRECT2>>1)) )
894
            ctx += 2;
895
    } else {
896
        if( refa > 0 )
897
            ctx++;
898
        if( refb > 0 )
899
            ctx += 2;
900
    }
901

    
902
    while( get_cabac( &h->cabac, &h->cabac_state[54+ctx] ) ) {
903
        ref++;
904
        ctx = (ctx>>2)+4;
905
        if(ref >= 32 /*h->ref_list[list]*/){
906
            return -1;
907
        }
908
    }
909
    return ref;
910
}
911

    
912
static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd, int *mvda) {
913
    int mvd;
914

    
915
    if(!get_cabac(&h->cabac, &h->cabac_state[ctxbase+((amvd-3)>>(INT_BIT-1))+((amvd-33)>>(INT_BIT-1))+2])){
916
//    if(!get_cabac(&h->cabac, &h->cabac_state[ctxbase+(amvd>2)+(amvd>32)])){
917
        *mvda= 0;
918
        return 0;
919
    }
920

    
921
    mvd= 1;
922
    ctxbase+= 3;
923
    while( mvd < 9 && get_cabac( &h->cabac, &h->cabac_state[ctxbase] ) ) {
924
        if( mvd < 4 )
925
            ctxbase++;
926
        mvd++;
927
    }
928

    
929
    if( mvd >= 9 ) {
930
        int k = 3;
931
        while( get_cabac_bypass( &h->cabac ) ) {
932
            mvd += 1 << k;
933
            k++;
934
            if(k>24){
935
                av_log(h->s.avctx, AV_LOG_ERROR, "overflow in decode_cabac_mb_mvd\n");
936
                return INT_MIN;
937
            }
938
        }
939
        while( k-- ) {
940
            mvd += get_cabac_bypass( &h->cabac )<<k;
941
        }
942
        *mvda=mvd < 70 ? mvd : 70;
943
    }else
944
        *mvda=mvd;
945
    return get_cabac_bypass_sign( &h->cabac, -mvd );
946
}
947

    
948
#define DECODE_CABAC_MB_MVD( h,  list,  n )\
949
{\
950
    int amvd0 = h->mvd_cache[list][scan8[n] - 1][0] +\
951
                h->mvd_cache[list][scan8[n] - 8][0];\
952
    int amvd1 = h->mvd_cache[list][scan8[n] - 1][1] +\
953
                h->mvd_cache[list][scan8[n] - 8][1];\
954
\
955
    mx += decode_cabac_mb_mvd( h, 40, amvd0, &mpx );\
956
    my += decode_cabac_mb_mvd( h, 47, amvd1, &mpy );\
957
}
958

    
959
static av_always_inline int get_cabac_cbf_ctx( H264Context *h, int cat, int idx, int is_dc ) {
960
    int nza, nzb;
961
    int ctx = 0;
962

    
963
    if( is_dc ) {
964
        if( cat == 0 ) {
965
            nza = h->left_cbp&0x100;
966
            nzb = h-> top_cbp&0x100;
967
        } else {
968
            idx -= CHROMA_DC_BLOCK_INDEX;
969
            nza = (h->left_cbp>>(6+idx))&0x01;
970
            nzb = (h-> top_cbp>>(6+idx))&0x01;
971
        }
972
    } else {
973
        assert(cat == 1 || cat == 2 || cat == 4);
974
        nza = h->non_zero_count_cache[scan8[idx] - 1];
975
        nzb = h->non_zero_count_cache[scan8[idx] - 8];
976
    }
977

    
978
    if( nza > 0 )
979
        ctx++;
980

    
981
    if( nzb > 0 )
982
        ctx += 2;
983

    
984
    return ctx + 4 * cat;
985
}
986

    
987
DECLARE_ASM_CONST(1, uint8_t, last_coeff_flag_offset_8x8)[63] = {
988
    0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
989
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
990
    3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
991
    5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8
992
};
993

    
994
static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff, int is_dc ) {
995
    static const int significant_coeff_flag_offset[2][6] = {
996
      { 105+0, 105+15, 105+29, 105+44, 105+47, 402 },
997
      { 277+0, 277+15, 277+29, 277+44, 277+47, 436 }
998
    };
999
    static const int last_coeff_flag_offset[2][6] = {
1000
      { 166+0, 166+15, 166+29, 166+44, 166+47, 417 },
1001
      { 338+0, 338+15, 338+29, 338+44, 338+47, 451 }
1002
    };
1003
    static const int coeff_abs_level_m1_offset[6] = {
1004
        227+0, 227+10, 227+20, 227+30, 227+39, 426
1005
    };
1006
    static const uint8_t significant_coeff_flag_offset_8x8[2][63] = {
1007
      { 0, 1, 2, 3, 4, 5, 5, 4, 4, 3, 3, 4, 4, 4, 5, 5,
1008
        4, 4, 4, 4, 3, 3, 6, 7, 7, 7, 8, 9,10, 9, 8, 7,
1009
        7, 6,11,12,13,11, 6, 7, 8, 9,14,10, 9, 8, 6,11,
1010
       12,13,11, 6, 9,14,10, 9,11,12,13,11,14,10,12 },
1011
      { 0, 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 7, 7, 8, 4, 5,
1012
        6, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,11,12,11,
1013
        9, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,13,13, 9,
1014
        9,10,10, 8,13,13, 9, 9,10,10,14,14,14,14,14 }
1015
    };
1016
    /* node ctx: 0..3: abslevel1 (with abslevelgt1 == 0).
1017
     * 4..7: abslevelgt1 + 3 (and abslevel1 doesn't matter).
1018
     * map node ctx => cabac ctx for level=1 */
1019
    static const uint8_t coeff_abs_level1_ctx[8] = { 1, 2, 3, 4, 0, 0, 0, 0 };
1020
    /* map node ctx => cabac ctx for level>1 */
1021
    static const uint8_t coeff_abs_levelgt1_ctx[8] = { 5, 5, 5, 5, 6, 7, 8, 9 };
1022
    static const uint8_t coeff_abs_level_transition[2][8] = {
1023
    /* update node ctx after decoding a level=1 */
1024
        { 1, 2, 3, 3, 4, 5, 6, 7 },
1025
    /* update node ctx after decoding a level>1 */
1026
        { 4, 4, 4, 4, 5, 6, 7, 7 }
1027
    };
1028

    
1029
    int index[64];
1030

    
1031
    int av_unused last;
1032
    int coeff_count = 0;
1033
    int node_ctx = 0;
1034

    
1035
    uint8_t *significant_coeff_ctx_base;
1036
    uint8_t *last_coeff_ctx_base;
1037
    uint8_t *abs_level_m1_ctx_base;
1038

    
1039
#if !ARCH_X86
1040
#define CABAC_ON_STACK
1041
#endif
1042
#ifdef CABAC_ON_STACK
1043
#define CC &cc
1044
    CABACContext cc;
1045
    cc.range     = h->cabac.range;
1046
    cc.low       = h->cabac.low;
1047
    cc.bytestream= h->cabac.bytestream;
1048
#else
1049
#define CC &h->cabac
1050
#endif
1051

    
1052
    significant_coeff_ctx_base = h->cabac_state
1053
        + significant_coeff_flag_offset[MB_FIELD][cat];
1054
    last_coeff_ctx_base = h->cabac_state
1055
        + last_coeff_flag_offset[MB_FIELD][cat];
1056
    abs_level_m1_ctx_base = h->cabac_state
1057
        + coeff_abs_level_m1_offset[cat];
1058

    
1059
    if( !is_dc && cat == 5 ) {
1060
#define DECODE_SIGNIFICANCE( coefs, sig_off, last_off ) \
1061
        for(last= 0; last < coefs; last++) { \
1062
            uint8_t *sig_ctx = significant_coeff_ctx_base + sig_off; \
1063
            if( get_cabac( CC, sig_ctx )) { \
1064
                uint8_t *last_ctx = last_coeff_ctx_base + last_off; \
1065
                index[coeff_count++] = last; \
1066
                if( get_cabac( CC, last_ctx ) ) { \
1067
                    last= max_coeff; \
1068
                    break; \
1069
                } \
1070
            } \
1071
        }\
1072
        if( last == max_coeff -1 ) {\
1073
            index[coeff_count++] = last;\
1074
        }
1075
        const uint8_t *sig_off = significant_coeff_flag_offset_8x8[MB_FIELD];
1076
#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
1077
        coeff_count= decode_significance_8x8_x86(CC, significant_coeff_ctx_base, index, sig_off);
1078
    } else {
1079
        coeff_count= decode_significance_x86(CC, max_coeff, significant_coeff_ctx_base, index);
1080
#else
1081
        DECODE_SIGNIFICANCE( 63, sig_off[last], last_coeff_flag_offset_8x8[last] );
1082
    } else {
1083
        DECODE_SIGNIFICANCE( max_coeff - 1, last, last );
1084
#endif
1085
    }
1086
    assert(coeff_count > 0);
1087

    
1088
    if( is_dc ) {
1089
        if( cat == 0 )
1090
            h->cbp_table[h->mb_xy] |= 0x100;
1091
        else
1092
            h->cbp_table[h->mb_xy] |= 0x40 << (n - CHROMA_DC_BLOCK_INDEX);
1093
        h->non_zero_count_cache[scan8[n]] = coeff_count;
1094
    } else {
1095
        if( cat == 5 )
1096
            fill_rectangle(&h->non_zero_count_cache[scan8[n]], 2, 2, 8, coeff_count, 1);
1097
        else {
1098
            assert( cat == 1 || cat == 2 || cat == 4 );
1099
            h->non_zero_count_cache[scan8[n]] = coeff_count;
1100
        }
1101
    }
1102

    
1103
    do {
1104
        uint8_t *ctx = coeff_abs_level1_ctx[node_ctx] + abs_level_m1_ctx_base;
1105

    
1106
        int j= scantable[index[--coeff_count]];
1107

    
1108
        if( get_cabac( CC, ctx ) == 0 ) {
1109
            node_ctx = coeff_abs_level_transition[0][node_ctx];
1110
            if( is_dc ) {
1111
                block[j] = get_cabac_bypass_sign( CC, -1);
1112
            }else{
1113
                block[j] = (get_cabac_bypass_sign( CC, -qmul[j]) + 32) >> 6;
1114
            }
1115
        } else {
1116
            int coeff_abs = 2;
1117
            ctx = coeff_abs_levelgt1_ctx[node_ctx] + abs_level_m1_ctx_base;
1118
            node_ctx = coeff_abs_level_transition[1][node_ctx];
1119

    
1120
            while( coeff_abs < 15 && get_cabac( CC, ctx ) ) {
1121
                coeff_abs++;
1122
            }
1123

    
1124
            if( coeff_abs >= 15 ) {
1125
                int j = 0;
1126
                while( get_cabac_bypass( CC ) ) {
1127
                    j++;
1128
                }
1129

    
1130
                coeff_abs=1;
1131
                while( j-- ) {
1132
                    coeff_abs += coeff_abs + get_cabac_bypass( CC );
1133
                }
1134
                coeff_abs+= 14;
1135
            }
1136

    
1137
            if( is_dc ) {
1138
                block[j] = get_cabac_bypass_sign( CC, -coeff_abs );
1139
            }else{
1140
                block[j] = (get_cabac_bypass_sign( CC, -coeff_abs ) * qmul[j] + 32) >> 6;
1141
            }
1142
        }
1143
    } while( coeff_count );
1144
#ifdef CABAC_ON_STACK
1145
            h->cabac.range     = cc.range     ;
1146
            h->cabac.low       = cc.low       ;
1147
            h->cabac.bytestream= cc.bytestream;
1148
#endif
1149

    
1150
}
1151

    
1152
static void decode_cabac_residual_dc_internal( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, int max_coeff ) {
1153
    decode_cabac_residual_internal(h, block, cat, n, scantable, NULL, max_coeff, 1);
1154
}
1155

    
1156
static void decode_cabac_residual_nondc_internal( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
1157
    decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, 0);
1158
}
1159

    
1160
/* cat: 0-> DC 16x16  n = 0
1161
 *      1-> AC 16x16  n = luma4x4idx
1162
 *      2-> Luma4x4   n = luma4x4idx
1163
 *      3-> DC Chroma n = iCbCr
1164
 *      4-> AC Chroma n = 16 + 4 * iCbCr + chroma4x4idx
1165
 *      5-> Luma8x8   n = 4 * luma8x8idx */
1166

    
1167
/* Partially inline the CABAC residual decode: inline the coded block flag.
1168
 * This has very little impact on binary size and improves performance
1169
 * because it allows improved constant propagation into get_cabac_cbf_ctx,
1170
 * as well as because most blocks have zero CBFs. */
1171

    
1172
static av_always_inline void decode_cabac_residual_dc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, int max_coeff ) {
1173
    /* read coded block flag */
1174
    if( get_cabac( &h->cabac, &h->cabac_state[85 + get_cabac_cbf_ctx( h, cat, n, 1 ) ] ) == 0 ) {
1175
        h->non_zero_count_cache[scan8[n]] = 0;
1176
        return;
1177
    }
1178
    decode_cabac_residual_dc_internal( h, block, cat, n, scantable, max_coeff );
1179
}
1180

    
1181
static av_always_inline void decode_cabac_residual_nondc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
1182
    /* read coded block flag */
1183
    if( cat != 5 && get_cabac( &h->cabac, &h->cabac_state[85 + get_cabac_cbf_ctx( h, cat, n, 0 ) ] ) == 0 ) {
1184
        h->non_zero_count_cache[scan8[n]] = 0;
1185
        return;
1186
    }
1187
    decode_cabac_residual_nondc_internal( h, block, cat, n, scantable, qmul, max_coeff );
1188
}
1189

    
1190
/**
1191
 * decodes a macroblock
1192
 * @return 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
1193
 */
1194
int ff_h264_decode_mb_cabac(H264Context *h) {
1195
    MpegEncContext * const s = &h->s;
1196
    int mb_xy;
1197
    int mb_type, partition_count, cbp = 0;
1198
    int dct8x8_allowed= h->pps.transform_8x8_mode;
1199

    
1200
    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
1201

    
1202
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
1203
    if( h->slice_type_nos != FF_I_TYPE ) {
1204
        int skip;
1205
        /* a skipped mb needs the aff flag from the following mb */
1206
        if( FRAME_MBAFF && (s->mb_y&1)==1 && h->prev_mb_skipped )
1207
            skip = h->next_mb_skipped;
1208
        else
1209
            skip = decode_cabac_mb_skip( h, s->mb_x, s->mb_y );
1210
        /* read skip flags */
1211
        if( skip ) {
1212
            if( FRAME_MBAFF && (s->mb_y&1)==0 ){
1213
                s->current_picture.mb_type[mb_xy] = MB_TYPE_SKIP;
1214
                h->next_mb_skipped = decode_cabac_mb_skip( h, s->mb_x, s->mb_y+1 );
1215
                if(!h->next_mb_skipped)
1216
                    h->mb_mbaff = h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
1217
            }
1218

    
1219
            decode_mb_skip(h);
1220

    
1221
            h->cbp_table[mb_xy] = 0;
1222
            h->chroma_pred_mode_table[mb_xy] = 0;
1223
            h->last_qscale_diff = 0;
1224

    
1225
            return 0;
1226

    
1227
        }
1228
    }
1229
    if(FRAME_MBAFF){
1230
        if( (s->mb_y&1) == 0 )
1231
            h->mb_mbaff =
1232
            h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
1233
    }
1234

    
1235
    h->prev_mb_skipped = 0;
1236

    
1237
    fill_decode_neighbors(h, -(MB_FIELD));
1238

    
1239
    if( h->slice_type_nos == FF_B_TYPE ) {
1240
        int ctx = 0;
1241
        assert(h->slice_type_nos == FF_B_TYPE);
1242

    
1243
        if( !IS_DIRECT( h->left_type[0]-1 ) )
1244
            ctx++;
1245
        if( !IS_DIRECT( h->top_type-1 ) )
1246
            ctx++;
1247

    
1248
        if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+ctx] ) ){
1249
            mb_type= 0; /* B_Direct_16x16 */
1250
        }else if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+3] ) ) {
1251
            mb_type= 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ); /* B_L[01]_16x16 */
1252
        }else{
1253
            int bits;
1254
            bits = get_cabac_noinline( &h->cabac, &h->cabac_state[27+4] ) << 3;
1255
            bits+= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 2;
1256
            bits+= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 1;
1257
            bits+= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
1258
            if( bits < 8 ){
1259
                mb_type= bits + 3; /* B_Bi_16x16 through B_L1_L0_16x8 */
1260
            }else if( bits == 13 ){
1261
                mb_type= decode_cabac_intra_mb_type(h, 32, 0);
1262
                goto decode_intra_mb;
1263
            }else if( bits == 14 ){
1264
                mb_type= 11; /* B_L1_L0_8x16 */
1265
            }else if( bits == 15 ){
1266
                mb_type= 22; /* B_8x8 */
1267
            }else{
1268
                bits= ( bits<<1 ) + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
1269
                mb_type= bits - 4; /* B_L0_Bi_* through B_Bi_Bi_* */
1270
            }
1271
        }
1272
            partition_count= b_mb_type_info[mb_type].partition_count;
1273
            mb_type=         b_mb_type_info[mb_type].type;
1274
    } else if( h->slice_type_nos == FF_P_TYPE ) {
1275
        if( get_cabac_noinline( &h->cabac, &h->cabac_state[14] ) == 0 ) {
1276
            /* P-type */
1277
            if( get_cabac_noinline( &h->cabac, &h->cabac_state[15] ) == 0 ) {
1278
                /* P_L0_D16x16, P_8x8 */
1279
                mb_type= 3 * get_cabac_noinline( &h->cabac, &h->cabac_state[16] );
1280
            } else {
1281
                /* P_L0_D8x16, P_L0_D16x8 */
1282
                mb_type= 2 - get_cabac_noinline( &h->cabac, &h->cabac_state[17] );
1283
            }
1284
            partition_count= p_mb_type_info[mb_type].partition_count;
1285
            mb_type=         p_mb_type_info[mb_type].type;
1286
        } else {
1287
            mb_type= decode_cabac_intra_mb_type(h, 17, 0);
1288
            goto decode_intra_mb;
1289
        }
1290
    } else {
1291
        mb_type= decode_cabac_intra_mb_type(h, 3, 1);
1292
        if(h->slice_type == FF_SI_TYPE && mb_type)
1293
            mb_type--;
1294
        assert(h->slice_type_nos == FF_I_TYPE);
1295
decode_intra_mb:
1296
        partition_count = 0;
1297
        cbp= i_mb_type_info[mb_type].cbp;
1298
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
1299
        mb_type= i_mb_type_info[mb_type].type;
1300
    }
1301
    if(MB_FIELD)
1302
        mb_type |= MB_TYPE_INTERLACED;
1303

    
1304
    h->slice_table[ mb_xy ]= h->slice_num;
1305

    
1306
    if(IS_INTRA_PCM(mb_type)) {
1307
        const uint8_t *ptr;
1308

    
1309
        // We assume these blocks are very rare so we do not optimize it.
1310
        // FIXME The two following lines get the bitstream position in the cabac
1311
        // decode, I think it should be done by a function in cabac.h (or cabac.c).
1312
        ptr= h->cabac.bytestream;
1313
        if(h->cabac.low&0x1) ptr--;
1314
        if(CABAC_BITS==16){
1315
            if(h->cabac.low&0x1FF) ptr--;
1316
        }
1317

    
1318
        // The pixels are stored in the same order as levels in h->mb array.
1319
        memcpy(h->mb, ptr, 256); ptr+=256;
1320
        if(CHROMA){
1321
            memcpy(h->mb+128, ptr, 128); ptr+=128;
1322
        }
1323

    
1324
        ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);
1325

    
1326
        // All blocks are present
1327
        h->cbp_table[mb_xy] = 0x1ef;
1328
        h->chroma_pred_mode_table[mb_xy] = 0;
1329
        // In deblocking, the quantizer is 0
1330
        s->current_picture.qscale_table[mb_xy]= 0;
1331
        // All coeffs are present
1332
        memset(h->non_zero_count[mb_xy], 16, 32);
1333
        s->current_picture.mb_type[mb_xy]= mb_type;
1334
        h->last_qscale_diff = 0;
1335
        return 0;
1336
    }
1337

    
1338
    if(MB_MBAFF){
1339
        h->ref_count[0] <<= 1;
1340
        h->ref_count[1] <<= 1;
1341
    }
1342

    
1343
    fill_decode_caches(h, mb_type);
1344

    
1345
    if( IS_INTRA( mb_type ) ) {
1346
        int i, pred_mode;
1347
        if( IS_INTRA4x4( mb_type ) ) {
1348
            if( dct8x8_allowed && get_cabac_noinline( &h->cabac, &h->cabac_state[399 + h->neighbor_transform_size] ) ) {
1349
                mb_type |= MB_TYPE_8x8DCT;
1350
                for( i = 0; i < 16; i+=4 ) {
1351
                    int pred = pred_intra_mode( h, i );
1352
                    int mode = decode_cabac_mb_intra4x4_pred_mode( h, pred );
1353
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
1354
                }
1355
            } else {
1356
                for( i = 0; i < 16; i++ ) {
1357
                    int pred = pred_intra_mode( h, i );
1358
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = decode_cabac_mb_intra4x4_pred_mode( h, pred );
1359

    
1360
                //av_log( s->avctx, AV_LOG_ERROR, "i4x4 pred=%d mode=%d\n", pred, h->intra4x4_pred_mode_cache[ scan8[i] ] );
1361
                }
1362
            }
1363
            ff_h264_write_back_intra_pred_mode(h);
1364
            if( ff_h264_check_intra4x4_pred_mode(h) < 0 ) return -1;
1365
        } else {
1366
            h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode( h, h->intra16x16_pred_mode );
1367
            if( h->intra16x16_pred_mode < 0 ) return -1;
1368
        }
1369
        if(CHROMA){
1370
            h->chroma_pred_mode_table[mb_xy] =
1371
            pred_mode                        = decode_cabac_mb_chroma_pre_mode( h );
1372

    
1373
            pred_mode= ff_h264_check_intra_pred_mode( h, pred_mode );
1374
            if( pred_mode < 0 ) return -1;
1375
            h->chroma_pred_mode= pred_mode;
1376
        } else {
1377
            h->chroma_pred_mode= DC_128_PRED8x8;
1378
        }
1379
    } else if( partition_count == 4 ) {
1380
        int i, j, sub_partition_count[4], list, ref[2][4];
1381

    
1382
        if( h->slice_type_nos == FF_B_TYPE ) {
1383
            for( i = 0; i < 4; i++ ) {
1384
                h->sub_mb_type[i] = decode_cabac_b_mb_sub_type( h );
1385
                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
1386
                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
1387
            }
1388
            if( IS_DIRECT(h->sub_mb_type[0] | h->sub_mb_type[1] |
1389
                          h->sub_mb_type[2] | h->sub_mb_type[3]) ) {
1390
                ff_h264_pred_direct_motion(h, &mb_type);
1391
                h->ref_cache[0][scan8[4]] =
1392
                h->ref_cache[1][scan8[4]] =
1393
                h->ref_cache[0][scan8[12]] =
1394
                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
1395
                    for( i = 0; i < 4; i++ )
1396
                        fill_rectangle( &h->direct_cache[scan8[4*i]], 2, 2, 8, (h->sub_mb_type[i]>>1)&0xFF, 1 );
1397
            }
1398
        } else {
1399
            for( i = 0; i < 4; i++ ) {
1400
                h->sub_mb_type[i] = decode_cabac_p_mb_sub_type( h );
1401
                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
1402
                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
1403
            }
1404
        }
1405

    
1406
        for( list = 0; list < h->list_count; list++ ) {
1407
                for( i = 0; i < 4; i++ ) {
1408
                    if(IS_DIRECT(h->sub_mb_type[i])) continue;
1409
                    if(IS_DIR(h->sub_mb_type[i], 0, list)){
1410
                        if( h->ref_count[list] > 1 ){
1411
                            ref[list][i] = decode_cabac_mb_ref( h, list, 4*i );
1412
                            if(ref[list][i] >= (unsigned)h->ref_count[list]){
1413
                                av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref[list][i], h->ref_count[list]);
1414
                                return -1;
1415
                            }
1416
                        }else
1417
                            ref[list][i] = 0;
1418
                    } else {
1419
                        ref[list][i] = -1;
1420
                    }
1421
                                                       h->ref_cache[list][ scan8[4*i]+1 ]=
1422
                    h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
1423
                }
1424
        }
1425

    
1426
        if(dct8x8_allowed)
1427
            dct8x8_allowed = get_dct8x8_allowed(h);
1428

    
1429
        for(list=0; list<h->list_count; list++){
1430
            for(i=0; i<4; i++){
1431
                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ];
1432
                if(IS_DIRECT(h->sub_mb_type[i])){
1433
                    fill_rectangle(h->mvd_cache[list][scan8[4*i]], 2, 2, 8, 0, 2);
1434
                    continue;
1435
                }
1436

    
1437
                if(IS_DIR(h->sub_mb_type[i], 0, list) && !IS_DIRECT(h->sub_mb_type[i])){
1438
                    const int sub_mb_type= h->sub_mb_type[i];
1439
                    const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
1440
                    for(j=0; j<sub_partition_count[i]; j++){
1441
                        int mpx, mpy;
1442
                        int mx, my;
1443
                        const int index= 4*i + block_width*j;
1444
                        int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
1445
                        uint8_t (* mvd_cache)[2]= &h->mvd_cache[list][ scan8[index] ];
1446
                        pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my);
1447
                        DECODE_CABAC_MB_MVD( h, list, index)
1448
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1449

    
1450
                        if(IS_SUB_8X8(sub_mb_type)){
1451
                            mv_cache[ 1 ][0]=
1452
                            mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
1453
                            mv_cache[ 1 ][1]=
1454
                            mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
1455

    
1456
                            mvd_cache[ 1 ][0]=
1457
                            mvd_cache[ 8 ][0]= mvd_cache[ 9 ][0]= mpx;
1458
                            mvd_cache[ 1 ][1]=
1459
                            mvd_cache[ 8 ][1]= mvd_cache[ 9 ][1]= mpy;
1460
                        }else if(IS_SUB_8X4(sub_mb_type)){
1461
                            mv_cache[ 1 ][0]= mx;
1462
                            mv_cache[ 1 ][1]= my;
1463

    
1464
                            mvd_cache[ 1 ][0]=  mpx;
1465
                            mvd_cache[ 1 ][1]= mpy;
1466
                        }else if(IS_SUB_4X8(sub_mb_type)){
1467
                            mv_cache[ 8 ][0]= mx;
1468
                            mv_cache[ 8 ][1]= my;
1469

    
1470
                            mvd_cache[ 8 ][0]= mpx;
1471
                            mvd_cache[ 8 ][1]= mpy;
1472
                        }
1473
                        mv_cache[ 0 ][0]= mx;
1474
                        mv_cache[ 0 ][1]= my;
1475

    
1476
                        mvd_cache[ 0 ][0]= mpx;
1477
                        mvd_cache[ 0 ][1]= mpy;
1478
                    }
1479
                }else{
1480
                    fill_rectangle(h->mv_cache [list][ scan8[4*i] ], 2, 2, 8, 0, 4);
1481
                    fill_rectangle(h->mvd_cache[list][ scan8[4*i] ], 2, 2, 8, 0, 2);
1482
                }
1483
            }
1484
        }
1485
    } else if( IS_DIRECT(mb_type) ) {
1486
        ff_h264_pred_direct_motion(h, &mb_type);
1487
        fill_rectangle(h->mvd_cache[0][scan8[0]], 4, 4, 8, 0, 2);
1488
        fill_rectangle(h->mvd_cache[1][scan8[0]], 4, 4, 8, 0, 2);
1489
        dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
1490
    } else {
1491
        int list, i;
1492
        if(IS_16X16(mb_type)){
1493
            for(list=0; list<h->list_count; list++){
1494
                if(IS_DIR(mb_type, 0, list)){
1495
                    int ref;
1496
                    if(h->ref_count[list] > 1){
1497
                        ref= decode_cabac_mb_ref(h, list, 0);
1498
                        if(ref >= (unsigned)h->ref_count[list]){
1499
                            av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
1500
                            return -1;
1501
                        }
1502
                    }else
1503
                        ref=0;
1504
                        fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, ref, 1);
1505
                }
1506
            }
1507
            for(list=0; list<h->list_count; list++){
1508
                if(IS_DIR(mb_type, 0, list)){
1509
                    int mx,my,mpx,mpy;
1510
                    pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my);
1511
                    DECODE_CABAC_MB_MVD( h, list, 0)
1512
                    tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1513

    
1514
                    fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack8to16(mpx,mpy), 2);
1515
                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
1516
                }
1517
            }
1518
        }
1519
        else if(IS_16X8(mb_type)){
1520
            for(list=0; list<h->list_count; list++){
1521
                    for(i=0; i<2; i++){
1522
                        if(IS_DIR(mb_type, i, list)){
1523
                            int ref;
1524
                            if(h->ref_count[list] > 1){
1525
                                ref= decode_cabac_mb_ref( h, list, 8*i );
1526
                                if(ref >= (unsigned)h->ref_count[list]){
1527
                                    av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
1528
                                    return -1;
1529
                                }
1530
                            }else
1531
                                ref=0;
1532
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, ref, 1);
1533
                        }else
1534
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, (LIST_NOT_USED&0xFF), 1);
1535
                    }
1536
            }
1537
            for(list=0; list<h->list_count; list++){
1538
                for(i=0; i<2; i++){
1539
                    if(IS_DIR(mb_type, i, list)){
1540
                        int mx,my,mpx,mpy;
1541
                        pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my);
1542
                        DECODE_CABAC_MB_MVD( h, list, 8*i)
1543
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1544

    
1545
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack8to16(mpx,mpy), 2);
1546
                        fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx,my), 4);
1547
                    }else{
1548
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 2);
1549
                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
1550
                    }
1551
                }
1552
            }
1553
        }else{
1554
            assert(IS_8X16(mb_type));
1555
            for(list=0; list<h->list_count; list++){
1556
                    for(i=0; i<2; i++){
1557
                        if(IS_DIR(mb_type, i, list)){ //FIXME optimize
1558
                            int ref;
1559
                            if(h->ref_count[list] > 1){
1560
                                ref= decode_cabac_mb_ref( h, list, 4*i );
1561
                                if(ref >= (unsigned)h->ref_count[list]){
1562
                                    av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
1563
                                    return -1;
1564
                                }
1565
                            }else
1566
                                ref=0;
1567
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, ref, 1);
1568
                        }else
1569
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, (LIST_NOT_USED&0xFF), 1);
1570
                    }
1571
            }
1572
            for(list=0; list<h->list_count; list++){
1573
                for(i=0; i<2; i++){
1574
                    if(IS_DIR(mb_type, i, list)){
1575
                        int mx,my,mpx,mpy;
1576
                        pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
1577
                        DECODE_CABAC_MB_MVD( h, list, 4*i)
1578

    
1579
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1580
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack8to16(mpx,mpy), 2);
1581
                        fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx,my), 4);
1582
                    }else{
1583
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 2);
1584
                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);
1585
                    }
1586
                }
1587
            }
1588
        }
1589
    }
1590

    
1591
   if( IS_INTER( mb_type ) ) {
1592
        h->chroma_pred_mode_table[mb_xy] = 0;
1593
        write_back_motion( h, mb_type );
1594
   }
1595

    
1596
    if( !IS_INTRA16x16( mb_type ) ) {
1597
        cbp  = decode_cabac_mb_cbp_luma( h );
1598
        if(CHROMA)
1599
            cbp |= decode_cabac_mb_cbp_chroma( h ) << 4;
1600
    }
1601

    
1602
    h->cbp_table[mb_xy] = h->cbp = cbp;
1603

    
1604
    if( dct8x8_allowed && (cbp&15) && !IS_INTRA( mb_type ) ) {
1605
        mb_type |= MB_TYPE_8x8DCT * get_cabac_noinline( &h->cabac, &h->cabac_state[399 + h->neighbor_transform_size] );
1606
    }
1607
    s->current_picture.mb_type[mb_xy]= mb_type;
1608

    
1609
    if( cbp || IS_INTRA16x16( mb_type ) ) {
1610
        const uint8_t *scan, *scan8x8;
1611
        const uint32_t *qmul;
1612

    
1613
        if(IS_INTERLACED(mb_type)){
1614
            scan8x8= s->qscale ? h->field_scan8x8 : h->field_scan8x8_q0;
1615
            scan= s->qscale ? h->field_scan : h->field_scan_q0;
1616
        }else{
1617
            scan8x8= s->qscale ? h->zigzag_scan8x8 : h->zigzag_scan8x8_q0;
1618
            scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
1619
        }
1620

    
1621
        // decode_cabac_mb_dqp
1622
        if(get_cabac_noinline( &h->cabac, &h->cabac_state[60 + (h->last_qscale_diff != 0)])){
1623
            int val = 1;
1624
            int ctx= 2;
1625

    
1626
            while( get_cabac_noinline( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
1627
                ctx= 3;
1628
                val++;
1629
                if(val > 102){ //prevent infinite loop
1630
                    av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\n", s->mb_x, s->mb_y);
1631
                    return -1;
1632
                }
1633
            }
1634

    
1635
            if( val&0x01 )
1636
                val=   (val + 1)>>1 ;
1637
            else
1638
                val= -((val + 1)>>1);
1639
            h->last_qscale_diff = val;
1640
            s->qscale += val;
1641
            if(((unsigned)s->qscale) > 51){
1642
                if(s->qscale<0) s->qscale+= 52;
1643
                else            s->qscale-= 52;
1644
            }
1645
            h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
1646
            h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
1647
        }else
1648
            h->last_qscale_diff=0;
1649

    
1650
        if( IS_INTRA16x16( mb_type ) ) {
1651
            int i;
1652
            //av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 DC\n" );
1653
            AV_ZERO128(h->mb_luma_dc+0);
1654
            AV_ZERO128(h->mb_luma_dc+8);
1655
            decode_cabac_residual_dc( h, h->mb_luma_dc, 0, LUMA_DC_BLOCK_INDEX, scan, 16);
1656

    
1657
            if( cbp&15 ) {
1658
                qmul = h->dequant4_coeff[0][s->qscale];
1659
                for( i = 0; i < 16; i++ ) {
1660
                    //av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 AC:%d\n", i );
1661
                    decode_cabac_residual_nondc(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);
1662
                }
1663
            } else {
1664
                fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
1665
            }
1666
        } else {
1667
            int i8x8, i4x4;
1668
            for( i8x8 = 0; i8x8 < 4; i8x8++ ) {
1669
                if( cbp & (1<<i8x8) ) {
1670
                    if( IS_8x8DCT(mb_type) ) {
1671
                        decode_cabac_residual_nondc(h, h->mb + 64*i8x8, 5, 4*i8x8,
1672
                            scan8x8, h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 64);
1673
                    } else {
1674
                        qmul = h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale];
1675
                        for( i4x4 = 0; i4x4 < 4; i4x4++ ) {
1676
                            const int index = 4*i8x8 + i4x4;
1677
                            //av_log( s->avctx, AV_LOG_ERROR, "Luma4x4: %d\n", index );
1678
//START_TIMER
1679
                            decode_cabac_residual_nondc(h, h->mb + 16*index, 2, index, scan, qmul, 16);
1680
//STOP_TIMER("decode_residual")
1681
                        }
1682
                    }
1683
                } else {
1684
                    uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
1685
                    nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
1686
                }
1687
            }
1688
        }
1689

    
1690
        if( cbp&0x30 ){
1691
            int c;
1692
            for( c = 0; c < 2; c++ ) {
1693
                //av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-DC\n",c );
1694
                decode_cabac_residual_dc(h, h->mb + 256 + 16*4*c, 3, CHROMA_DC_BLOCK_INDEX+c, chroma_dc_scan, 4);
1695
            }
1696
        }
1697

    
1698
        if( cbp&0x20 ) {
1699
            int c, i;
1700
            for( c = 0; c < 2; c++ ) {
1701
                qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[c]];
1702
                for( i = 0; i < 4; i++ ) {
1703
                    const int index = 16 + 4 * c + i;
1704
                    //av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-AC %d\n",c, index - 16 );
1705
                    decode_cabac_residual_nondc(h, h->mb + 16*index, 4, index, scan + 1, qmul, 15);
1706
                }
1707
            }
1708
        } else {
1709
            uint8_t * const nnz= &h->non_zero_count_cache[0];
1710
            nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
1711
            nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
1712
        }
1713
    } else {
1714
        uint8_t * const nnz= &h->non_zero_count_cache[0];
1715
        fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
1716
        nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
1717
        nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
1718
        h->last_qscale_diff = 0;
1719
    }
1720

    
1721
    s->current_picture.qscale_table[mb_xy]= s->qscale;
1722
    write_back_non_zero_count(h);
1723

    
1724
    if(MB_MBAFF){
1725
        h->ref_count[0] >>= 1;
1726
        h->ref_count[1] >>= 1;
1727
    }
1728

    
1729
    return 0;
1730
}