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ffmpeg / libavcodec / h264_cabac.c @ 2a1f431d

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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 FFmpeg.
6
 *
7
 * FFmpeg 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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 * FFmpeg 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 FFmpeg; 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

    
1053
    /* cat: 0-> DC 16x16  n = 0
1054
     *      1-> AC 16x16  n = luma4x4idx
1055
     *      2-> Luma4x4   n = luma4x4idx
1056
     *      3-> DC Chroma n = iCbCr
1057
     *      4-> AC Chroma n = 16 + 4 * iCbCr + chroma4x4idx
1058
     *      5-> Luma8x8   n = 4 * luma8x8idx
1059
     */
1060

    
1061
    /* read coded block flag */
1062
    if( is_dc || cat != 5 ) {
1063
        if( get_cabac( CC, &h->cabac_state[85 + get_cabac_cbf_ctx( h, cat, n, is_dc ) ] ) == 0 ) {
1064
            h->non_zero_count_cache[scan8[n]] = 0;
1065

    
1066
#ifdef CABAC_ON_STACK
1067
            h->cabac.range     = cc.range     ;
1068
            h->cabac.low       = cc.low       ;
1069
            h->cabac.bytestream= cc.bytestream;
1070
#endif
1071
            return;
1072
        }
1073
    }
1074

    
1075
    significant_coeff_ctx_base = h->cabac_state
1076
        + significant_coeff_flag_offset[MB_FIELD][cat];
1077
    last_coeff_ctx_base = h->cabac_state
1078
        + last_coeff_flag_offset[MB_FIELD][cat];
1079
    abs_level_m1_ctx_base = h->cabac_state
1080
        + coeff_abs_level_m1_offset[cat];
1081

    
1082
    if( !is_dc && cat == 5 ) {
1083
#define DECODE_SIGNIFICANCE( coefs, sig_off, last_off ) \
1084
        for(last= 0; last < coefs; last++) { \
1085
            uint8_t *sig_ctx = significant_coeff_ctx_base + sig_off; \
1086
            if( get_cabac( CC, sig_ctx )) { \
1087
                uint8_t *last_ctx = last_coeff_ctx_base + last_off; \
1088
                index[coeff_count++] = last; \
1089
                if( get_cabac( CC, last_ctx ) ) { \
1090
                    last= max_coeff; \
1091
                    break; \
1092
                } \
1093
            } \
1094
        }\
1095
        if( last == max_coeff -1 ) {\
1096
            index[coeff_count++] = last;\
1097
        }
1098
        const uint8_t *sig_off = significant_coeff_flag_offset_8x8[MB_FIELD];
1099
#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
1100
        coeff_count= decode_significance_8x8_x86(CC, significant_coeff_ctx_base, index, sig_off);
1101
    } else {
1102
        coeff_count= decode_significance_x86(CC, max_coeff, significant_coeff_ctx_base, index);
1103
#else
1104
        DECODE_SIGNIFICANCE( 63, sig_off[last], last_coeff_flag_offset_8x8[last] );
1105
    } else {
1106
        DECODE_SIGNIFICANCE( max_coeff - 1, last, last );
1107
#endif
1108
    }
1109
    assert(coeff_count > 0);
1110

    
1111
    if( is_dc ) {
1112
        if( cat == 0 )
1113
            h->cbp_table[h->mb_xy] |= 0x100;
1114
        else
1115
            h->cbp_table[h->mb_xy] |= 0x40 << (n - CHROMA_DC_BLOCK_INDEX);
1116
        h->non_zero_count_cache[scan8[n]] = coeff_count;
1117
    } else {
1118
        if( cat == 5 )
1119
            fill_rectangle(&h->non_zero_count_cache[scan8[n]], 2, 2, 8, coeff_count, 1);
1120
        else {
1121
            assert( cat == 1 || cat == 2 || cat == 4 );
1122
            h->non_zero_count_cache[scan8[n]] = coeff_count;
1123
        }
1124
    }
1125

    
1126
    do {
1127
        uint8_t *ctx = coeff_abs_level1_ctx[node_ctx] + abs_level_m1_ctx_base;
1128

    
1129
        int j= scantable[index[--coeff_count]];
1130

    
1131
        if( get_cabac( CC, ctx ) == 0 ) {
1132
            node_ctx = coeff_abs_level_transition[0][node_ctx];
1133
            if( is_dc ) {
1134
                block[j] = get_cabac_bypass_sign( CC, -1);
1135
            }else{
1136
                block[j] = (get_cabac_bypass_sign( CC, -qmul[j]) + 32) >> 6;
1137
            }
1138
        } else {
1139
            int coeff_abs = 2;
1140
            ctx = coeff_abs_levelgt1_ctx[node_ctx] + abs_level_m1_ctx_base;
1141
            node_ctx = coeff_abs_level_transition[1][node_ctx];
1142

    
1143
            while( coeff_abs < 15 && get_cabac( CC, ctx ) ) {
1144
                coeff_abs++;
1145
            }
1146

    
1147
            if( coeff_abs >= 15 ) {
1148
                int j = 0;
1149
                while( get_cabac_bypass( CC ) ) {
1150
                    j++;
1151
                }
1152

    
1153
                coeff_abs=1;
1154
                while( j-- ) {
1155
                    coeff_abs += coeff_abs + get_cabac_bypass( CC );
1156
                }
1157
                coeff_abs+= 14;
1158
            }
1159

    
1160
            if( is_dc ) {
1161
                block[j] = get_cabac_bypass_sign( CC, -coeff_abs );
1162
            }else{
1163
                block[j] = (get_cabac_bypass_sign( CC, -coeff_abs ) * qmul[j] + 32) >> 6;
1164
            }
1165
        }
1166
    } while( coeff_count );
1167
#ifdef CABAC_ON_STACK
1168
            h->cabac.range     = cc.range     ;
1169
            h->cabac.low       = cc.low       ;
1170
            h->cabac.bytestream= cc.bytestream;
1171
#endif
1172

    
1173
}
1174

    
1175
static void decode_cabac_residual_dc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, int max_coeff ) {
1176
    decode_cabac_residual_internal(h, block, cat, n, scantable, NULL, max_coeff, 1);
1177
}
1178

    
1179
static void decode_cabac_residual_nondc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
1180
    decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, 0);
1181
}
1182

    
1183
/**
1184
 * decodes a macroblock
1185
 * @return 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
1186
 */
1187
int ff_h264_decode_mb_cabac(H264Context *h) {
1188
    MpegEncContext * const s = &h->s;
1189
    int mb_xy;
1190
    int mb_type, partition_count, cbp = 0;
1191
    int dct8x8_allowed= h->pps.transform_8x8_mode;
1192

    
1193
    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
1194

    
1195
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
1196
    if( h->slice_type_nos != FF_I_TYPE ) {
1197
        int skip;
1198
        /* a skipped mb needs the aff flag from the following mb */
1199
        if( FRAME_MBAFF && (s->mb_y&1)==1 && h->prev_mb_skipped )
1200
            skip = h->next_mb_skipped;
1201
        else
1202
            skip = decode_cabac_mb_skip( h, s->mb_x, s->mb_y );
1203
        /* read skip flags */
1204
        if( skip ) {
1205
            if( FRAME_MBAFF && (s->mb_y&1)==0 ){
1206
                s->current_picture.mb_type[mb_xy] = MB_TYPE_SKIP;
1207
                h->next_mb_skipped = decode_cabac_mb_skip( h, s->mb_x, s->mb_y+1 );
1208
                if(!h->next_mb_skipped)
1209
                    h->mb_mbaff = h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
1210
            }
1211

    
1212
            decode_mb_skip(h);
1213

    
1214
            h->cbp_table[mb_xy] = 0;
1215
            h->chroma_pred_mode_table[mb_xy] = 0;
1216
            h->last_qscale_diff = 0;
1217

    
1218
            return 0;
1219

    
1220
        }
1221
    }
1222
    if(FRAME_MBAFF){
1223
        if( (s->mb_y&1) == 0 )
1224
            h->mb_mbaff =
1225
            h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
1226
    }
1227

    
1228
    h->prev_mb_skipped = 0;
1229

    
1230
    fill_decode_neighbors(h, -(MB_FIELD));
1231

    
1232
    if( h->slice_type_nos == FF_B_TYPE ) {
1233
        int ctx = 0;
1234
        assert(h->slice_type_nos == FF_B_TYPE);
1235

    
1236
        if( !IS_DIRECT( h->left_type[0]-1 ) )
1237
            ctx++;
1238
        if( !IS_DIRECT( h->top_type-1 ) )
1239
            ctx++;
1240

    
1241
        if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+ctx] ) ){
1242
            mb_type= 0; /* B_Direct_16x16 */
1243
        }else if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+3] ) ) {
1244
            mb_type= 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ); /* B_L[01]_16x16 */
1245
        }else{
1246
            int bits;
1247
            bits = get_cabac_noinline( &h->cabac, &h->cabac_state[27+4] ) << 3;
1248
            bits+= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 2;
1249
            bits+= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 1;
1250
            bits+= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
1251
            if( bits < 8 ){
1252
                mb_type= bits + 3; /* B_Bi_16x16 through B_L1_L0_16x8 */
1253
            }else if( bits == 13 ){
1254
                mb_type= decode_cabac_intra_mb_type(h, 32, 0);
1255
                goto decode_intra_mb;
1256
            }else if( bits == 14 ){
1257
                mb_type= 11; /* B_L1_L0_8x16 */
1258
            }else if( bits == 15 ){
1259
                mb_type= 22; /* B_8x8 */
1260
            }else{
1261
                bits= ( bits<<1 ) + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
1262
                mb_type= bits - 4; /* B_L0_Bi_* through B_Bi_Bi_* */
1263
            }
1264
        }
1265
            partition_count= b_mb_type_info[mb_type].partition_count;
1266
            mb_type=         b_mb_type_info[mb_type].type;
1267
    } else if( h->slice_type_nos == FF_P_TYPE ) {
1268
        if( get_cabac_noinline( &h->cabac, &h->cabac_state[14] ) == 0 ) {
1269
            /* P-type */
1270
            if( get_cabac_noinline( &h->cabac, &h->cabac_state[15] ) == 0 ) {
1271
                /* P_L0_D16x16, P_8x8 */
1272
                mb_type= 3 * get_cabac_noinline( &h->cabac, &h->cabac_state[16] );
1273
            } else {
1274
                /* P_L0_D8x16, P_L0_D16x8 */
1275
                mb_type= 2 - get_cabac_noinline( &h->cabac, &h->cabac_state[17] );
1276
            }
1277
            partition_count= p_mb_type_info[mb_type].partition_count;
1278
            mb_type=         p_mb_type_info[mb_type].type;
1279
        } else {
1280
            mb_type= decode_cabac_intra_mb_type(h, 17, 0);
1281
            goto decode_intra_mb;
1282
        }
1283
    } else {
1284
        mb_type= decode_cabac_intra_mb_type(h, 3, 1);
1285
        if(h->slice_type == FF_SI_TYPE && mb_type)
1286
            mb_type--;
1287
        assert(h->slice_type_nos == FF_I_TYPE);
1288
decode_intra_mb:
1289
        partition_count = 0;
1290
        cbp= i_mb_type_info[mb_type].cbp;
1291
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
1292
        mb_type= i_mb_type_info[mb_type].type;
1293
    }
1294
    if(MB_FIELD)
1295
        mb_type |= MB_TYPE_INTERLACED;
1296

    
1297
    h->slice_table[ mb_xy ]= h->slice_num;
1298

    
1299
    if(IS_INTRA_PCM(mb_type)) {
1300
        const uint8_t *ptr;
1301

    
1302
        // We assume these blocks are very rare so we do not optimize it.
1303
        // FIXME The two following lines get the bitstream position in the cabac
1304
        // decode, I think it should be done by a function in cabac.h (or cabac.c).
1305
        ptr= h->cabac.bytestream;
1306
        if(h->cabac.low&0x1) ptr--;
1307
        if(CABAC_BITS==16){
1308
            if(h->cabac.low&0x1FF) ptr--;
1309
        }
1310

    
1311
        // The pixels are stored in the same order as levels in h->mb array.
1312
        memcpy(h->mb, ptr, 256); ptr+=256;
1313
        if(CHROMA){
1314
            memcpy(h->mb+128, ptr, 128); ptr+=128;
1315
        }
1316

    
1317
        ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);
1318

    
1319
        // All blocks are present
1320
        h->cbp_table[mb_xy] = 0x1ef;
1321
        h->chroma_pred_mode_table[mb_xy] = 0;
1322
        // In deblocking, the quantizer is 0
1323
        s->current_picture.qscale_table[mb_xy]= 0;
1324
        // All coeffs are present
1325
        memset(h->non_zero_count[mb_xy], 16, 32);
1326
        s->current_picture.mb_type[mb_xy]= mb_type;
1327
        h->last_qscale_diff = 0;
1328
        return 0;
1329
    }
1330

    
1331
    if(MB_MBAFF){
1332
        h->ref_count[0] <<= 1;
1333
        h->ref_count[1] <<= 1;
1334
    }
1335

    
1336
    fill_decode_caches(h, mb_type);
1337

    
1338
    if( IS_INTRA( mb_type ) ) {
1339
        int i, pred_mode;
1340
        if( IS_INTRA4x4( mb_type ) ) {
1341
            if( dct8x8_allowed && get_cabac_noinline( &h->cabac, &h->cabac_state[399 + h->neighbor_transform_size] ) ) {
1342
                mb_type |= MB_TYPE_8x8DCT;
1343
                for( i = 0; i < 16; i+=4 ) {
1344
                    int pred = pred_intra_mode( h, i );
1345
                    int mode = decode_cabac_mb_intra4x4_pred_mode( h, pred );
1346
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
1347
                }
1348
            } else {
1349
                for( i = 0; i < 16; i++ ) {
1350
                    int pred = pred_intra_mode( h, i );
1351
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = decode_cabac_mb_intra4x4_pred_mode( h, pred );
1352

    
1353
                //av_log( s->avctx, AV_LOG_ERROR, "i4x4 pred=%d mode=%d\n", pred, h->intra4x4_pred_mode_cache[ scan8[i] ] );
1354
                }
1355
            }
1356
            ff_h264_write_back_intra_pred_mode(h);
1357
            if( ff_h264_check_intra4x4_pred_mode(h) < 0 ) return -1;
1358
        } else {
1359
            h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode( h, h->intra16x16_pred_mode );
1360
            if( h->intra16x16_pred_mode < 0 ) return -1;
1361
        }
1362
        if(CHROMA){
1363
            h->chroma_pred_mode_table[mb_xy] =
1364
            pred_mode                        = decode_cabac_mb_chroma_pre_mode( h );
1365

    
1366
            pred_mode= ff_h264_check_intra_pred_mode( h, pred_mode );
1367
            if( pred_mode < 0 ) return -1;
1368
            h->chroma_pred_mode= pred_mode;
1369
        }
1370
    } else if( partition_count == 4 ) {
1371
        int i, j, sub_partition_count[4], list, ref[2][4];
1372

    
1373
        if( h->slice_type_nos == FF_B_TYPE ) {
1374
            for( i = 0; i < 4; i++ ) {
1375
                h->sub_mb_type[i] = decode_cabac_b_mb_sub_type( h );
1376
                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
1377
                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
1378
            }
1379
            if( IS_DIRECT(h->sub_mb_type[0] | h->sub_mb_type[1] |
1380
                          h->sub_mb_type[2] | h->sub_mb_type[3]) ) {
1381
                ff_h264_pred_direct_motion(h, &mb_type);
1382
                h->ref_cache[0][scan8[4]] =
1383
                h->ref_cache[1][scan8[4]] =
1384
                h->ref_cache[0][scan8[12]] =
1385
                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
1386
                    for( i = 0; i < 4; i++ )
1387
                        fill_rectangle( &h->direct_cache[scan8[4*i]], 2, 2, 8, (h->sub_mb_type[i]>>1)&0xFF, 1 );
1388
            }
1389
        } else {
1390
            for( i = 0; i < 4; i++ ) {
1391
                h->sub_mb_type[i] = decode_cabac_p_mb_sub_type( h );
1392
                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
1393
                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
1394
            }
1395
        }
1396

    
1397
        for( list = 0; list < h->list_count; list++ ) {
1398
                for( i = 0; i < 4; i++ ) {
1399
                    if(IS_DIRECT(h->sub_mb_type[i])) continue;
1400
                    if(IS_DIR(h->sub_mb_type[i], 0, list)){
1401
                        if( h->ref_count[list] > 1 ){
1402
                            ref[list][i] = decode_cabac_mb_ref( h, list, 4*i );
1403
                            if(ref[list][i] >= (unsigned)h->ref_count[list]){
1404
                                av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref[list][i], h->ref_count[list]);
1405
                                return -1;
1406
                            }
1407
                        }else
1408
                            ref[list][i] = 0;
1409
                    } else {
1410
                        ref[list][i] = -1;
1411
                    }
1412
                                                       h->ref_cache[list][ scan8[4*i]+1 ]=
1413
                    h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
1414
                }
1415
        }
1416

    
1417
        if(dct8x8_allowed)
1418
            dct8x8_allowed = get_dct8x8_allowed(h);
1419

    
1420
        for(list=0; list<h->list_count; list++){
1421
            for(i=0; i<4; i++){
1422
                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ];
1423
                if(IS_DIRECT(h->sub_mb_type[i])){
1424
                    fill_rectangle(h->mvd_cache[list][scan8[4*i]], 2, 2, 8, 0, 2);
1425
                    continue;
1426
                }
1427

    
1428
                if(IS_DIR(h->sub_mb_type[i], 0, list) && !IS_DIRECT(h->sub_mb_type[i])){
1429
                    const int sub_mb_type= h->sub_mb_type[i];
1430
                    const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
1431
                    for(j=0; j<sub_partition_count[i]; j++){
1432
                        int mpx, mpy;
1433
                        int mx, my;
1434
                        const int index= 4*i + block_width*j;
1435
                        int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
1436
                        uint8_t (* mvd_cache)[2]= &h->mvd_cache[list][ scan8[index] ];
1437
                        pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my);
1438
                        DECODE_CABAC_MB_MVD( h, list, index)
1439
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1440

    
1441
                        if(IS_SUB_8X8(sub_mb_type)){
1442
                            mv_cache[ 1 ][0]=
1443
                            mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
1444
                            mv_cache[ 1 ][1]=
1445
                            mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
1446

    
1447
                            mvd_cache[ 1 ][0]=
1448
                            mvd_cache[ 8 ][0]= mvd_cache[ 9 ][0]= mpx;
1449
                            mvd_cache[ 1 ][1]=
1450
                            mvd_cache[ 8 ][1]= mvd_cache[ 9 ][1]= mpy;
1451
                        }else if(IS_SUB_8X4(sub_mb_type)){
1452
                            mv_cache[ 1 ][0]= mx;
1453
                            mv_cache[ 1 ][1]= my;
1454

    
1455
                            mvd_cache[ 1 ][0]=  mpx;
1456
                            mvd_cache[ 1 ][1]= mpy;
1457
                        }else if(IS_SUB_4X8(sub_mb_type)){
1458
                            mv_cache[ 8 ][0]= mx;
1459
                            mv_cache[ 8 ][1]= my;
1460

    
1461
                            mvd_cache[ 8 ][0]= mpx;
1462
                            mvd_cache[ 8 ][1]= mpy;
1463
                        }
1464
                        mv_cache[ 0 ][0]= mx;
1465
                        mv_cache[ 0 ][1]= my;
1466

    
1467
                        mvd_cache[ 0 ][0]= mpx;
1468
                        mvd_cache[ 0 ][1]= mpy;
1469
                    }
1470
                }else{
1471
                    fill_rectangle(h->mv_cache [list][ scan8[4*i] ], 2, 2, 8, 0, 4);
1472
                    fill_rectangle(h->mvd_cache[list][ scan8[4*i] ], 2, 2, 8, 0, 2);
1473
                }
1474
            }
1475
        }
1476
    } else if( IS_DIRECT(mb_type) ) {
1477
        ff_h264_pred_direct_motion(h, &mb_type);
1478
        fill_rectangle(h->mvd_cache[0][scan8[0]], 4, 4, 8, 0, 2);
1479
        fill_rectangle(h->mvd_cache[1][scan8[0]], 4, 4, 8, 0, 2);
1480
        dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
1481
    } else {
1482
        int list, i;
1483
        if(IS_16X16(mb_type)){
1484
            for(list=0; list<h->list_count; list++){
1485
                if(IS_DIR(mb_type, 0, list)){
1486
                    int ref;
1487
                    if(h->ref_count[list] > 1){
1488
                        ref= decode_cabac_mb_ref(h, list, 0);
1489
                        if(ref >= (unsigned)h->ref_count[list]){
1490
                            av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
1491
                            return -1;
1492
                        }
1493
                    }else
1494
                        ref=0;
1495
                        fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, ref, 1);
1496
                }
1497
            }
1498
            for(list=0; list<h->list_count; list++){
1499
                if(IS_DIR(mb_type, 0, list)){
1500
                    int mx,my,mpx,mpy;
1501
                    pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my);
1502
                    DECODE_CABAC_MB_MVD( h, list, 0)
1503
                    tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1504

    
1505
                    fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack8to16(mpx,mpy), 2);
1506
                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
1507
                }
1508
            }
1509
        }
1510
        else if(IS_16X8(mb_type)){
1511
            for(list=0; list<h->list_count; list++){
1512
                    for(i=0; i<2; i++){
1513
                        if(IS_DIR(mb_type, i, list)){
1514
                            int ref;
1515
                            if(h->ref_count[list] > 1){
1516
                                ref= decode_cabac_mb_ref( h, list, 8*i );
1517
                                if(ref >= (unsigned)h->ref_count[list]){
1518
                                    av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
1519
                                    return -1;
1520
                                }
1521
                            }else
1522
                                ref=0;
1523
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, ref, 1);
1524
                        }else
1525
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, (LIST_NOT_USED&0xFF), 1);
1526
                    }
1527
            }
1528
            for(list=0; list<h->list_count; list++){
1529
                for(i=0; i<2; i++){
1530
                    if(IS_DIR(mb_type, i, list)){
1531
                        int mx,my,mpx,mpy;
1532
                        pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my);
1533
                        DECODE_CABAC_MB_MVD( h, list, 8*i)
1534
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1535

    
1536
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack8to16(mpx,mpy), 2);
1537
                        fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx,my), 4);
1538
                    }else{
1539
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 2);
1540
                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
1541
                    }
1542
                }
1543
            }
1544
        }else{
1545
            assert(IS_8X16(mb_type));
1546
            for(list=0; list<h->list_count; list++){
1547
                    for(i=0; i<2; i++){
1548
                        if(IS_DIR(mb_type, i, list)){ //FIXME optimize
1549
                            int ref;
1550
                            if(h->ref_count[list] > 1){
1551
                                ref= decode_cabac_mb_ref( h, list, 4*i );
1552
                                if(ref >= (unsigned)h->ref_count[list]){
1553
                                    av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
1554
                                    return -1;
1555
                                }
1556
                            }else
1557
                                ref=0;
1558
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, ref, 1);
1559
                        }else
1560
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, (LIST_NOT_USED&0xFF), 1);
1561
                    }
1562
            }
1563
            for(list=0; list<h->list_count; list++){
1564
                for(i=0; i<2; i++){
1565
                    if(IS_DIR(mb_type, i, list)){
1566
                        int mx,my,mpx,mpy;
1567
                        pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
1568
                        DECODE_CABAC_MB_MVD( h, list, 4*i)
1569

    
1570
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1571
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack8to16(mpx,mpy), 2);
1572
                        fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx,my), 4);
1573
                    }else{
1574
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 2);
1575
                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);
1576
                    }
1577
                }
1578
            }
1579
        }
1580
    }
1581

    
1582
   if( IS_INTER( mb_type ) ) {
1583
        h->chroma_pred_mode_table[mb_xy] = 0;
1584
        write_back_motion( h, mb_type );
1585
   }
1586

    
1587
    if( !IS_INTRA16x16( mb_type ) ) {
1588
        cbp  = decode_cabac_mb_cbp_luma( h );
1589
        if(CHROMA)
1590
            cbp |= decode_cabac_mb_cbp_chroma( h ) << 4;
1591
    }
1592

    
1593
    h->cbp_table[mb_xy] = h->cbp = cbp;
1594

    
1595
    if( dct8x8_allowed && (cbp&15) && !IS_INTRA( mb_type ) ) {
1596
        mb_type |= MB_TYPE_8x8DCT * get_cabac_noinline( &h->cabac, &h->cabac_state[399 + h->neighbor_transform_size] );
1597
    }
1598
    s->current_picture.mb_type[mb_xy]= mb_type;
1599

    
1600
    if( cbp || IS_INTRA16x16( mb_type ) ) {
1601
        const uint8_t *scan, *scan8x8;
1602
        const uint32_t *qmul;
1603

    
1604
        if(IS_INTERLACED(mb_type)){
1605
            scan8x8= s->qscale ? h->field_scan8x8 : h->field_scan8x8_q0;
1606
            scan= s->qscale ? h->field_scan : h->field_scan_q0;
1607
        }else{
1608
            scan8x8= s->qscale ? h->zigzag_scan8x8 : h->zigzag_scan8x8_q0;
1609
            scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
1610
        }
1611

    
1612
        // decode_cabac_mb_dqp
1613
        if(get_cabac_noinline( &h->cabac, &h->cabac_state[60 + (h->last_qscale_diff != 0)])){
1614
            int val = 1;
1615
            int ctx= 2;
1616

    
1617
            while( get_cabac_noinline( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
1618
                ctx= 3;
1619
                val++;
1620
                if(val > 102){ //prevent infinite loop
1621
                    av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\n", s->mb_x, s->mb_y);
1622
                    return -1;
1623
                }
1624
            }
1625

    
1626
            if( val&0x01 )
1627
                val=   (val + 1)>>1 ;
1628
            else
1629
                val= -((val + 1)>>1);
1630
            h->last_qscale_diff = val;
1631
            s->qscale += val;
1632
            if(((unsigned)s->qscale) > 51){
1633
                if(s->qscale<0) s->qscale+= 52;
1634
                else            s->qscale-= 52;
1635
            }
1636
            h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
1637
            h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
1638
        }else
1639
            h->last_qscale_diff=0;
1640

    
1641
        if( IS_INTRA16x16( mb_type ) ) {
1642
            int i;
1643
            //av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 DC\n" );
1644
            AV_ZERO128(h->mb_luma_dc+0);
1645
            AV_ZERO128(h->mb_luma_dc+8);
1646
            decode_cabac_residual_dc( h, h->mb_luma_dc, 0, LUMA_DC_BLOCK_INDEX, scan, 16);
1647

    
1648
            if( cbp&15 ) {
1649
                qmul = h->dequant4_coeff[0][s->qscale];
1650
                for( i = 0; i < 16; i++ ) {
1651
                    //av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 AC:%d\n", i );
1652
                    decode_cabac_residual_nondc(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);
1653
                }
1654
            } else {
1655
                fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
1656
            }
1657
        } else {
1658
            int i8x8, i4x4;
1659
            for( i8x8 = 0; i8x8 < 4; i8x8++ ) {
1660
                if( cbp & (1<<i8x8) ) {
1661
                    if( IS_8x8DCT(mb_type) ) {
1662
                        decode_cabac_residual_nondc(h, h->mb + 64*i8x8, 5, 4*i8x8,
1663
                            scan8x8, h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 64);
1664
                    } else {
1665
                        qmul = h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale];
1666
                        for( i4x4 = 0; i4x4 < 4; i4x4++ ) {
1667
                            const int index = 4*i8x8 + i4x4;
1668
                            //av_log( s->avctx, AV_LOG_ERROR, "Luma4x4: %d\n", index );
1669
//START_TIMER
1670
                            decode_cabac_residual_nondc(h, h->mb + 16*index, 2, index, scan, qmul, 16);
1671
//STOP_TIMER("decode_residual")
1672
                        }
1673
                    }
1674
                } else {
1675
                    uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
1676
                    nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
1677
                }
1678
            }
1679
        }
1680

    
1681
        if( cbp&0x30 ){
1682
            int c;
1683
            AV_ZERO128(h->mb_chroma_dc);
1684
            for( c = 0; c < 2; c++ ) {
1685
                //av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-DC\n",c );
1686
                decode_cabac_residual_dc(h, h->mb_chroma_dc[c], 3, CHROMA_DC_BLOCK_INDEX+c, chroma_dc_scan, 4);
1687
            }
1688
        }
1689

    
1690
        if( cbp&0x20 ) {
1691
            int c, i;
1692
            for( c = 0; c < 2; c++ ) {
1693
                qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[c]];
1694
                for( i = 0; i < 4; i++ ) {
1695
                    const int index = 16 + 4 * c + i;
1696
                    //av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-AC %d\n",c, index - 16 );
1697
                    decode_cabac_residual_nondc(h, h->mb + 16*index, 4, index, scan + 1, qmul, 15);
1698
                }
1699
            }
1700
        } else {
1701
            uint8_t * const nnz= &h->non_zero_count_cache[0];
1702
            nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
1703
            nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
1704
        }
1705
    } else {
1706
        uint8_t * const nnz= &h->non_zero_count_cache[0];
1707
        fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
1708
        nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
1709
        nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
1710
        h->last_qscale_diff = 0;
1711
    }
1712

    
1713
    s->current_picture.qscale_table[mb_xy]= s->qscale;
1714
    write_back_non_zero_count(h);
1715

    
1716
    if(MB_MBAFF){
1717
        h->ref_count[0] >>= 1;
1718
        h->ref_count[1] >>= 1;
1719
    }
1720

    
1721
    return 0;
1722
}