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cavsdec.c
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1 /*
2  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3  * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
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  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
25  * @author Stefan Gehrer <stefan.gehrer@gmx.de>
26  */
27 
28 #include "libavutil/avassert.h"
29 #include "avcodec.h"
30 #include "get_bits.h"
31 #include "golomb.h"
32 #include "cavs.h"
33 #include "internal.h"
34 #include "mpeg12data.h"
35 
36 static const uint8_t mv_scan[4] = {
37  MV_FWD_X0, MV_FWD_X1,
38  MV_FWD_X2, MV_FWD_X3
39 };
40 
41 static const uint8_t cbp_tab[64][2] = {
42  { 63, 0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, { 0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 },
43  { 7, 14 }, { 5, 11 }, { 10, 12 }, { 8, 5 }, { 12, 10 }, { 61, 7 }, { 4, 48 }, { 55, 3 },
44  { 1, 2 }, { 2, 8 }, { 59, 4 }, { 3, 1 }, { 62, 61 }, { 9, 55 }, { 6, 59 }, { 29, 62 },
45  { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53, 9 }, { 30, 6 },
46  { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 },
47  { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 },
48  { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 },
49  { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 }
50 };
51 
52 static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
53 
54 static const uint8_t dequant_shift[64] = {
55  14, 14, 14, 14, 14, 14, 14, 14,
56  13, 13, 13, 13, 13, 13, 13, 13,
57  13, 12, 12, 12, 12, 12, 12, 12,
58  11, 11, 11, 11, 11, 11, 11, 11,
59  11, 10, 10, 10, 10, 10, 10, 10,
60  10, 9, 9, 9, 9, 9, 9, 9,
61  9, 8, 8, 8, 8, 8, 8, 8,
62  7, 7, 7, 7, 7, 7, 7, 7
63 };
64 
65 static const uint16_t dequant_mul[64] = {
66  32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
67  32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
68  65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
69  32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
70  65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
71  65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
72  65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
73  32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
74 };
75 
76 #define EOB 0, 0, 0
77 
78 static const struct dec_2dvlc intra_dec[7] = {
79  {
80  { //level / run / table_inc
81  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
82  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
83  { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
84  { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 },
85  { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
86  { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 },
87  { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 },
88  { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 },
89  { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 },
90  { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB }
91  },
92  //level_add
93  { 0, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1 },
94  2, //golomb_order
95  0, //inc_limit
96  23, //max_run
97  },
98  {
99  { //level / run
100  { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 },
101  { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
102  { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 },
103  { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 },
104  { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 },
105  { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 },
106  { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 },
107  { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 },
108  { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 },
109  { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 }
110  },
111  //level_add
112  { 0, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
113  2, //golomb_order
114  1, //inc_limit
115  15, //max_run
116  },
117  {
118  { //level / run
119  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 },
120  { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
121  { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
122  { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
123  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 },
124  { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
125  { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 },
126  { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 },
127  { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 },
128  { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 }
129  },
130  //level_add
131  { 0, 10, 6, 4, 4, 3, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
132  2, //golomb_order
133  2, //inc_limit
134  10, //max_run
135  },
136  {
137  { //level / run
138  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
139  { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 },
140  { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 },
141  { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
142  { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
143  { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 },
144  { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 },
145  { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 },
146  { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 },
147  { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 }
148  },
149  //level_add
150  { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
151  2, //golomb_order
152  4, //inc_limit
153  7, //max_run
154  },
155  {
156  { //level / run
157  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
158  { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
159  { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 },
160  { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 },
161  {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 },
162  {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 },
163  {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 },
164  { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 },
165  {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 },
166  { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 }
167  },
168  //level_add
169  { 0,18, 8, 4, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
170  2, //golomb_order
171  7, //inc_limit
172  5, //max_run
173  },
174  {
175  { //level / run
176  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
177  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
178  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
179  { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 },
180  {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 },
181  { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 },
182  { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 },
183  {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 },
184  { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 },
185  { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }
186  },
187  //level_add
188  { 0, 22, 7, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
189  2, //golomb_order
190  10, //inc_limit
191  3, //max_run
192  },
193  {
194  { //level / run
195  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
196  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
197  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
198  { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 },
199  {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 },
200  {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 },
201  {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 },
202  {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 },
203  {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 },
204  {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 }
205  },
206  //level_add
207  { 0, 27, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
208  2, //golomb_order
209  INT_MAX, //inc_limit
210  2, //max_run
211  }
212 };
213 
214 static const struct dec_2dvlc inter_dec[7] = {
215  {
216  { //level / run
217  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
218  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
219  { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
220  { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 },
221  { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 },
222  { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 },
223  { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 },
224  { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 },
225  { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
226  { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB }
227  },
228  //level_add
229  { 0, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 },
230  3, //golomb_order
231  0, //inc_limit
232  26 //max_run
233  },
234  {
235  { //level / run
236  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 },
237  { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
238  { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 },
239  { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 },
240  { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 },
241  { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 },
242  { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 },
243  { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 },
244  { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 },
245  { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 }
246  },
247  //level_add
248  { 0, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1 },
249  2, //golomb_order
250  1, //inc_limit
251  19 //max_run
252  },
253  {
254  { //level / run
255  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 },
256  { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 },
257  { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
258  { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 },
259  { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 },
260  { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 },
261  { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 },
262  { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 },
263  { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 },
264  { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 }
265  },
266  //level_add
267  { 0, 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
268  2, //golomb_order
269  2, //inc_limit
270  14 //max_run
271  },
272  {
273  { //level / run
274  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
275  { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
276  { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 },
277  { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 },
278  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 },
279  { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
280  { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 },
281  { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 },
282  { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 },
283  { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 }
284  },
285  //level_add
286  { 0,10, 6, 5, 4, 3, 3, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
287  2, //golomb_order
288  3, //inc_limit
289  10 //max_run
290  },
291  {
292  { //level / run
293  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
294  { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 },
295  { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 },
296  { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
297  { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
298  { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 },
299  { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 },
300  {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 },
301  { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 },
302  { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 }
303  },
304  //level_add
305  { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
306  2, //golomb_order
307  6, //inc_limit
308  7 //max_run
309  },
310  {
311  { //level / run
312  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
313  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 },
314  { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 },
315  { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 },
316  { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 },
317  { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 },
318  { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 },
319  { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 },
320  { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 },
321  { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 }
322  },
323  //level_add
324  { 0, 17, 8, 4, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
325  2, //golomb_order
326  9, //inc_limit
327  5 //max_run
328  },
329  {
330  { //level / run
331  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
332  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
333  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 },
334  { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
335  { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 },
336  { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 },
337  { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 },
338  { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 },
339  { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 },
340  { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 }
341  },
342  //level_add
343  { 0, 22, 6, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
344  2, //golomb_order
345  INT_MAX, //inc_limit
346  4 //max_run
347  }
348 };
349 
350 static const struct dec_2dvlc chroma_dec[5] = {
351  {
352  { //level / run
353  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
354  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
355  { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 },
356  { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 },
357  { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
358  { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 },
359  { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 },
360  { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 },
361  { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
362  { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB }
363  },
364  //level_add
365  { 0, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1 },
366  2, //golomb_order
367  0, //inc_limit
368  25 //max_run
369  },
370  {
371  { //level / run
372  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 },
373  { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
374  { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 },
375  { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 },
376  { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 },
377  { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 },
378  { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 },
379  { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 },
380  { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 },
381  { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 }
382  },
383  //level_add
384  { 0, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1 },
385  0, //golomb_order
386  1, //inc_limit
387  20 //max_run
388  },
389  {
390  { //level / run
391  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
392  { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 },
393  { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
394  { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
395  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 },
396  { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 },
397  { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 },
398  { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 },
399  { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 },
400  { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 },
401  },
402  //level_add
403  { 0,10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
404  1, //golomb_order
405  2, //inc_limit
406  11 //max_run
407  },
408  {
409  { //level / run
410  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
411  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 },
412  { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 },
413  { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 },
414  { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 },
415  { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 },
416  {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 },
417  { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 },
418  {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 },
419  {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 },
420  },
421  //level_add
422  { 0, 14, 7, 4, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
423  1, //golomb_order
424  4, //inc_limit
425  8 //max_run
426  },
427  {
428  { //level / run
429  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
430  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
431  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 },
432  { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
433  { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 },
434  { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 },
435  { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 },
436  { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 },
437  { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 },
438  { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 },
439  },
440  //level_add
441  { 0, 20, 7, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
442  0, //golomb_order
443  INT_MAX, //inc_limit
444  5, //max_run
445  }
446 };
447 
448 #undef EOB
449 
450 /*****************************************************************************
451  *
452  * motion vector prediction
453  *
454  ****************************************************************************/
455 
456 static inline void store_mvs(AVSContext *h)
457 {
458  h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0];
459  h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1];
460  h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2];
461  h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3];
462 }
463 
464 static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
465  cavs_vector *col_mv)
466 {
467  cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
468  int den = h->direct_den[col_mv->ref];
469  int m = FF_SIGNBIT(col_mv->x);
470 
471  pmv_fw->dist = h->dist[1];
472  pmv_bw->dist = h->dist[0];
473  pmv_fw->ref = 1;
474  pmv_bw->ref = 0;
475  /* scale the co-located motion vector according to its temporal span */
476  pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
477  pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
478  m = FF_SIGNBIT(col_mv->y);
479  pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
480  pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
481 }
482 
483 static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
484  enum cavs_block size)
485 {
486  cavs_vector *dst = src + MV_BWD_OFFS;
487 
488  /* backward mv is the scaled and negated forward mv */
489  dst->x = -((src->x * h->sym_factor + 256) >> 9);
490  dst->y = -((src->y * h->sym_factor + 256) >> 9);
491  dst->ref = 0;
492  dst->dist = h->dist[0];
493  set_mvs(dst, size);
494 }
495 
496 /*****************************************************************************
497  *
498  * residual data decoding
499  *
500  ****************************************************************************/
501 
502 /** kth-order exponential golomb code */
503 static inline int get_ue_code(GetBitContext *gb, int order)
504 {
505  unsigned ret = get_ue_golomb(gb);
506  if (ret >= ((1U<<31)>>order)) {
507  av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n");
508  return AVERROR_INVALIDDATA;
509  }
510  if (order) {
511  return (ret<<order) + get_bits(gb, order);
512  }
513  return ret;
514 }
515 
516 static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
517  int16_t *dst, int mul, int shift, int coeff_num)
518 {
519  int round = 1 << (shift - 1);
520  int pos = -1;
521  const uint8_t *scantab = h->scantable.permutated;
522 
523  /* inverse scan and dequantization */
524  while (--coeff_num >= 0) {
525  pos += run_buf[coeff_num];
526  if (pos > 63) {
527  av_log(h->avctx, AV_LOG_ERROR,
528  "position out of block bounds at pic %d MB(%d,%d)\n",
529  h->cur.poc, h->mbx, h->mby);
530  return AVERROR_INVALIDDATA;
531  }
532  dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift;
533  }
534  return 0;
535 }
536 
537 /**
538  * decode coefficients from one 8x8 block, dequantize, inverse transform
539  * and add them to sample block
540  * @param r pointer to 2D VLC table
541  * @param esc_golomb_order escape codes are k-golomb with this order k
542  * @param qp quantizer
543  * @param dst location of sample block
544  * @param stride line stride in frame buffer
545  */
546 static int decode_residual_block(AVSContext *h, GetBitContext *gb,
547  const struct dec_2dvlc *r, int esc_golomb_order,
548  int qp, uint8_t *dst, int stride)
549 {
550  int i, esc_code, level, mask, ret;
551  unsigned int level_code, run;
552  int16_t level_buf[65];
553  uint8_t run_buf[65];
554  int16_t *block = h->block;
555 
556  for (i = 0; i < 65; i++) {
557  level_code = get_ue_code(gb, r->golomb_order);
558  if (level_code >= ESCAPE_CODE) {
559  run = ((level_code - ESCAPE_CODE) >> 1) + 1;
560  if(run > 64) {
561  av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run);
562  return AVERROR_INVALIDDATA;
563  }
564  esc_code = get_ue_code(gb, esc_golomb_order);
565  if (esc_code < 0 || esc_code > 32767) {
566  av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n");
567  return AVERROR_INVALIDDATA;
568  }
569 
570  level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
571  while (level > r->inc_limit)
572  r++;
573  mask = -(level_code & 1);
574  level = (level ^ mask) - mask;
575  } else {
576  level = r->rltab[level_code][0];
577  if (!level) //end of block signal
578  break;
579  run = r->rltab[level_code][1];
580  r += r->rltab[level_code][2];
581  }
582  level_buf[i] = level;
583  run_buf[i] = run;
584  }
585  if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp],
586  dequant_shift[qp], i)) < 0)
587  return ret;
588  h->cdsp.cavs_idct8_add(dst, block, stride);
589  h->bdsp.clear_block(block);
590  return 0;
591 }
592 
593 
594 static inline void decode_residual_chroma(AVSContext *h)
595 {
596  if (h->cbp & (1 << 4))
597  decode_residual_block(h, &h->gb, chroma_dec, 0,
598  ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride);
599  if (h->cbp & (1 << 5))
600  decode_residual_block(h, &h->gb, chroma_dec, 0,
601  ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride);
602 }
603 
604 static inline int decode_residual_inter(AVSContext *h)
605 {
606  int block;
607 
608  /* get coded block pattern */
609  int cbp = get_ue_golomb(&h->gb);
610  if (cbp > 63U) {
611  av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
612  return AVERROR_INVALIDDATA;
613  }
614  h->cbp = cbp_tab[cbp][1];
615 
616  /* get quantizer */
617  if (h->cbp && !h->qp_fixed)
618  h->qp = (h->qp + get_se_golomb(&h->gb)) & 63;
619  for (block = 0; block < 4; block++)
620  if (h->cbp & (1 << block))
621  decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
622  h->cy + h->luma_scan[block], h->l_stride);
623  decode_residual_chroma(h);
624 
625  return 0;
626 }
627 
628 /*****************************************************************************
629  *
630  * macroblock level
631  *
632  ****************************************************************************/
633 
634 static inline void set_mv_intra(AVSContext *h)
635 {
636  h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
637  set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
638  h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
639  set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
640  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B)
641  h->col_type_base[h->mbidx] = I_8X8;
642 }
643 
644 static int decode_mb_i(AVSContext *h, int cbp_code)
645 {
646  GetBitContext *gb = &h->gb;
647  unsigned pred_mode_uv;
648  int block;
649  uint8_t top[18];
650  uint8_t *left = NULL;
651  uint8_t *d;
652 
653  ff_cavs_init_mb(h);
654 
655  /* get intra prediction modes from stream */
656  for (block = 0; block < 4; block++) {
657  int nA, nB, predpred;
658  int pos = scan3x3[block];
659 
660  nA = h->pred_mode_Y[pos - 1];
661  nB = h->pred_mode_Y[pos - 3];
662  predpred = FFMIN(nA, nB);
663  if (predpred == NOT_AVAIL) // if either is not available
664  predpred = INTRA_L_LP;
665  if (!get_bits1(gb)) {
666  int rem_mode = get_bits(gb, 2);
667  predpred = rem_mode + (rem_mode >= predpred);
668  }
669  h->pred_mode_Y[pos] = predpred;
670  }
671  pred_mode_uv = get_ue_golomb(gb);
672  if (pred_mode_uv > 6) {
673  av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
674  return AVERROR_INVALIDDATA;
675  }
676  ff_cavs_modify_mb_i(h, &pred_mode_uv);
677 
678  /* get coded block pattern */
679  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
680  cbp_code = get_ue_golomb(gb);
681  if (cbp_code > 63U) {
682  av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
683  return AVERROR_INVALIDDATA;
684  }
685  h->cbp = cbp_tab[cbp_code][0];
686  if (h->cbp && !h->qp_fixed)
687  h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
688 
689  /* luma intra prediction interleaved with residual decode/transform/add */
690  for (block = 0; block < 4; block++) {
691  d = h->cy + h->luma_scan[block];
692  ff_cavs_load_intra_pred_luma(h, top, &left, block);
693  h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
694  (d, top, left, h->l_stride);
695  if (h->cbp & (1<<block))
696  decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
697  }
698 
699  /* chroma intra prediction */
700  ff_cavs_load_intra_pred_chroma(h);
701  h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
702  h->left_border_u, h->c_stride);
703  h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
704  h->left_border_v, h->c_stride);
705 
706  decode_residual_chroma(h);
707  ff_cavs_filter(h, I_8X8);
708  set_mv_intra(h);
709  return 0;
710 }
711 
712 static inline void set_intra_mode_default(AVSContext *h)
713 {
714  if (h->stream_revision > 0) {
715  h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
716  h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
717  } else {
718  h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
719  h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
720  }
721 }
722 
723 static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
724 {
725  GetBitContext *gb = &h->gb;
726  int ref[4];
727 
728  ff_cavs_init_mb(h);
729  switch (mb_type) {
730  case P_SKIP:
731  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
732  break;
733  case P_16X16:
734  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
735  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
736  break;
737  case P_16X8:
738  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
739  ref[2] = h->ref_flag ? 0 : get_bits1(gb);
740  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
741  ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
742  break;
743  case P_8X16:
744  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
745  ref[1] = h->ref_flag ? 0 : get_bits1(gb);
746  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
747  ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
748  break;
749  case P_8X8:
750  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
751  ref[1] = h->ref_flag ? 0 : get_bits1(gb);
752  ref[2] = h->ref_flag ? 0 : get_bits1(gb);
753  ref[3] = h->ref_flag ? 0 : get_bits1(gb);
754  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
755  ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
756  ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
757  ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
758  }
759  ff_cavs_inter(h, mb_type);
760  set_intra_mode_default(h);
761  store_mvs(h);
762  if (mb_type != P_SKIP)
763  decode_residual_inter(h);
764  ff_cavs_filter(h, mb_type);
765  h->col_type_base[h->mbidx] = mb_type;
766 }
767 
768 static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
769 {
770  int block;
771  enum cavs_sub_mb sub_type[4];
772  int flags;
773 
774  ff_cavs_init_mb(h);
775 
776  /* reset all MVs */
777  h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
778  set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
779  h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
780  set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
781  switch (mb_type) {
782  case B_SKIP:
783  case B_DIRECT:
784  if (!h->col_type_base[h->mbidx]) {
785  /* intra MB at co-location, do in-plane prediction */
786  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
787  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
788  } else
789  /* direct prediction from co-located P MB, block-wise */
790  for (block = 0; block < 4; block++)
791  mv_pred_direct(h, &h->mv[mv_scan[block]],
792  &h->col_mv[h->mbidx * 4 + block]);
793  break;
794  case B_FWD_16X16:
795  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
796  break;
797  case B_SYM_16X16:
798  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
799  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
800  break;
801  case B_BWD_16X16:
802  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
803  break;
804  case B_8X8:
805 #define TMP_UNUSED_INX 7
806  flags = 0;
807  for (block = 0; block < 4; block++)
808  sub_type[block] = get_bits(&h->gb, 2);
809  for (block = 0; block < 4; block++) {
810  switch (sub_type[block]) {
811  case B_SUB_DIRECT:
812  if (!h->col_type_base[h->mbidx]) {
813  /* intra MB at co-location, do in-plane prediction */
814  if(flags==0) {
815  // if col-MB is a Intra MB, current Block size is 16x16.
816  // AVS standard section 9.9.1
817  if(block>0){
818  h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ];
819  h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
820  }
821  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2,
822  MV_PRED_BSKIP, BLK_8X8, 1);
823  ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS,
824  MV_FWD_C2+MV_BWD_OFFS,
825  MV_PRED_BSKIP, BLK_8X8, 0);
826  if(block>0) {
827  flags = mv_scan[block];
828  h->mv[flags ] = h->mv[MV_FWD_X0 ];
829  h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
830  h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ];
831  h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS];
832  } else
833  flags = MV_FWD_X0;
834  } else {
835  h->mv[mv_scan[block] ] = h->mv[flags ];
836  h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS];
837  }
838  } else
839  mv_pred_direct(h, &h->mv[mv_scan[block]],
840  &h->col_mv[h->mbidx * 4 + block]);
841  break;
842  case B_SUB_FWD:
843  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
844  MV_PRED_MEDIAN, BLK_8X8, 1);
845  break;
846  case B_SUB_SYM:
847  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
848  MV_PRED_MEDIAN, BLK_8X8, 1);
849  mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
850  break;
851  }
852  }
853 #undef TMP_UNUSED_INX
854  for (block = 0; block < 4; block++) {
855  if (sub_type[block] == B_SUB_BWD)
856  ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
857  mv_scan[block] + MV_BWD_OFFS - 3,
858  MV_PRED_MEDIAN, BLK_8X8, 0);
859  }
860  break;
861  default:
862  if (mb_type <= B_SYM_16X16) {
863  av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
864  return AVERROR_INVALIDDATA;
865  }
866  av_assert2(mb_type < B_8X8);
867  flags = ff_cavs_partition_flags[mb_type];
868  if (mb_type & 1) { /* 16x8 macroblock types */
869  if (flags & FWD0)
870  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
871  if (flags & SYM0)
872  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
873  if (flags & FWD1)
874  ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
875  if (flags & SYM1)
876  mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
877  if (flags & BWD0)
878  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
879  if (flags & BWD1)
880  ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
881  } else { /* 8x16 macroblock types */
882  if (flags & FWD0)
883  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
884  if (flags & SYM0)
885  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
886  if (flags & FWD1)
887  ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
888  if (flags & SYM1)
889  mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
890  if (flags & BWD0)
891  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
892  if (flags & BWD1)
893  ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
894  }
895  }
896  ff_cavs_inter(h, mb_type);
897  set_intra_mode_default(h);
898  if (mb_type != B_SKIP)
899  decode_residual_inter(h);
900  ff_cavs_filter(h, mb_type);
901 
902  return 0;
903 }
904 
905 /*****************************************************************************
906  *
907  * slice level
908  *
909  ****************************************************************************/
910 
911 static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
912 {
913  if (h->stc > 0xAF)
914  av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
915 
916  if (h->stc >= h->mb_height) {
917  av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc);
918  return AVERROR_INVALIDDATA;
919  }
920 
921  h->mby = h->stc;
922  h->mbidx = h->mby * h->mb_width;
923 
924  /* mark top macroblocks as unavailable */
925  h->flags &= ~(B_AVAIL | C_AVAIL);
926  if (!h->pic_qp_fixed) {
927  h->qp_fixed = get_bits1(gb);
928  h->qp = get_bits(gb, 6);
929  }
930  /* inter frame or second slice can have weighting params */
931  if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
932  (!h->pic_structure && h->mby >= h->mb_width / 2))
933  if (get_bits1(gb)) { //slice_weighting_flag
934  av_log(h->avctx, AV_LOG_ERROR,
935  "weighted prediction not yet supported\n");
936  }
937  return 0;
938 }
939 
940 static inline int check_for_slice(AVSContext *h)
941 {
942  GetBitContext *gb = &h->gb;
943  int align;
944 
945  if (h->mbx)
946  return 0;
947  align = (-get_bits_count(gb)) & 7;
948  /* check for stuffing byte */
949  if (!align && (show_bits(gb, 8) == 0x80))
950  align = 8;
951  if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
952  skip_bits_long(gb, 24 + align);
953  h->stc = get_bits(gb, 8);
954  if (h->stc >= h->mb_height)
955  return 0;
956  decode_slice_header(h, gb);
957  return 1;
958  }
959  return 0;
960 }
961 
962 /*****************************************************************************
963  *
964  * frame level
965  *
966  ****************************************************************************/
967 
968 static int decode_pic(AVSContext *h)
969 {
970  int ret;
971  int skip_count = -1;
972  enum cavs_mb mb_type;
973 
974  if (!h->top_qp) {
975  av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n");
976  return AVERROR_INVALIDDATA;
977  }
978 
979  av_frame_unref(h->cur.f);
980 
981  skip_bits(&h->gb, 16);//bbv_dwlay
982  if (h->stc == PIC_PB_START_CODE) {
983  h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
984  if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
985  av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
986  return AVERROR_INVALIDDATA;
987  }
988  /* make sure we have the reference frames we need */
989  if (!h->DPB[0].f->data[0] ||
990  (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
991  return AVERROR_INVALIDDATA;
992  } else {
993  h->cur.f->pict_type = AV_PICTURE_TYPE_I;
994  if (get_bits1(&h->gb))
995  skip_bits(&h->gb, 24);//time_code
996  /* old sample clips were all progressive and no low_delay,
997  bump stream revision if detected otherwise */
998  if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
999  h->stream_revision = 1;
1000  /* similarly test top_field_first and repeat_first_field */
1001  else if (show_bits(&h->gb, 11) & 3)
1002  h->stream_revision = 1;
1003  if (h->stream_revision > 0)
1004  skip_bits(&h->gb, 1); //marker_bit
1005  }
1006 
1007  ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
1008  0 : AV_GET_BUFFER_FLAG_REF);
1009  if (ret < 0)
1010  return ret;
1011 
1012  if (!h->edge_emu_buffer) {
1013  int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
1014  h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
1015  if (!h->edge_emu_buffer)
1016  return AVERROR(ENOMEM);
1017  }
1018 
1019  if ((ret = ff_cavs_init_pic(h)) < 0)
1020  return ret;
1021  h->cur.poc = get_bits(&h->gb, 8) * 2;
1022 
1023  /* get temporal distances and MV scaling factors */
1024  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1025  h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511;
1026  } else {
1027  h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511;
1028  }
1029  h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511;
1030  h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
1031  h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
1032  if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
1033  h->sym_factor = h->dist[0] * h->scale_den[1];
1034  } else {
1035  h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
1036  h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
1037  }
1038 
1039  if (h->low_delay)
1040  get_ue_golomb(&h->gb); //bbv_check_times
1041  h->progressive = get_bits1(&h->gb);
1042  h->pic_structure = 1;
1043  if (!h->progressive)
1044  h->pic_structure = get_bits1(&h->gb);
1045  if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
1046  skip_bits1(&h->gb); //advanced_pred_mode_disable
1047  skip_bits1(&h->gb); //top_field_first
1048  skip_bits1(&h->gb); //repeat_first_field
1049  h->pic_qp_fixed =
1050  h->qp_fixed = get_bits1(&h->gb);
1051  h->qp = get_bits(&h->gb, 6);
1052  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1053  if (!h->progressive && !h->pic_structure)
1054  skip_bits1(&h->gb);//what is this?
1055  skip_bits(&h->gb, 4); //reserved bits
1056  } else {
1057  if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
1058  h->ref_flag = get_bits1(&h->gb);
1059  skip_bits(&h->gb, 4); //reserved bits
1060  h->skip_mode_flag = get_bits1(&h->gb);
1061  }
1062  h->loop_filter_disable = get_bits1(&h->gb);
1063  if (!h->loop_filter_disable && get_bits1(&h->gb)) {
1064  h->alpha_offset = get_se_golomb(&h->gb);
1065  h->beta_offset = get_se_golomb(&h->gb);
1066  } else {
1067  h->alpha_offset = h->beta_offset = 0;
1068  }
1069  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1070  do {
1071  check_for_slice(h);
1072  decode_mb_i(h, 0);
1073  } while (ff_cavs_next_mb(h));
1074  } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
1075  do {
1076  if (check_for_slice(h))
1077  skip_count = -1;
1078  if (h->skip_mode_flag && (skip_count < 0))
1079  skip_count = get_ue_golomb(&h->gb);
1080  if (h->skip_mode_flag && skip_count--) {
1081  decode_mb_p(h, P_SKIP);
1082  } else {
1083  mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
1084  if (mb_type > P_8X8)
1085  decode_mb_i(h, mb_type - P_8X8 - 1);
1086  else
1087  decode_mb_p(h, mb_type);
1088  }
1089  } while (ff_cavs_next_mb(h));
1090  } else { /* AV_PICTURE_TYPE_B */
1091  do {
1092  if (check_for_slice(h))
1093  skip_count = -1;
1094  if (h->skip_mode_flag && (skip_count < 0))
1095  skip_count = get_ue_golomb(&h->gb);
1096  if (h->skip_mode_flag && skip_count--) {
1097  decode_mb_b(h, B_SKIP);
1098  } else {
1099  mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
1100  if (mb_type > B_8X8)
1101  decode_mb_i(h, mb_type - B_8X8 - 1);
1102  else
1103  decode_mb_b(h, mb_type);
1104  }
1105  } while (ff_cavs_next_mb(h));
1106  }
1107  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1108  av_frame_unref(h->DPB[1].f);
1109  FFSWAP(AVSFrame, h->cur, h->DPB[1]);
1110  FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
1111  }
1112  return 0;
1113 }
1114 
1115 /*****************************************************************************
1116  *
1117  * headers and interface
1118  *
1119  ****************************************************************************/
1120 
1121 static int decode_seq_header(AVSContext *h)
1122 {
1123  int frame_rate_code;
1124  int width, height;
1125  int ret;
1126 
1127  h->profile = get_bits(&h->gb, 8);
1128  h->level = get_bits(&h->gb, 8);
1129  skip_bits1(&h->gb); //progressive sequence
1130 
1131  width = get_bits(&h->gb, 14);
1132  height = get_bits(&h->gb, 14);
1133  if ((h->width || h->height) && (h->width != width || h->height != height)) {
1134  avpriv_report_missing_feature(h->avctx,
1135  "Width/height changing in CAVS");
1136  return AVERROR_PATCHWELCOME;
1137  }
1138  if (width <= 0 || height <= 0) {
1139  av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
1140  return AVERROR_INVALIDDATA;
1141  }
1142  skip_bits(&h->gb, 2); //chroma format
1143  skip_bits(&h->gb, 3); //sample_precision
1144  h->aspect_ratio = get_bits(&h->gb, 4);
1145  frame_rate_code = get_bits(&h->gb, 4);
1146  if (frame_rate_code == 0 || frame_rate_code > 13) {
1147  av_log(h->avctx, AV_LOG_WARNING,
1148  "frame_rate_code %d is invalid\n", frame_rate_code);
1149  frame_rate_code = 1;
1150  }
1151 
1152  skip_bits(&h->gb, 18); //bit_rate_lower
1153  skip_bits1(&h->gb); //marker_bit
1154  skip_bits(&h->gb, 12); //bit_rate_upper
1155  h->low_delay = get_bits1(&h->gb);
1156 
1157  ret = ff_set_dimensions(h->avctx, width, height);
1158  if (ret < 0)
1159  return ret;
1160 
1161  h->width = width;
1162  h->height = height;
1163  h->mb_width = (h->width + 15) >> 4;
1164  h->mb_height = (h->height + 15) >> 4;
1165  h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
1166  if (!h->top_qp)
1167  return ff_cavs_init_top_lines(h);
1168  return 0;
1169 }
1170 
1171 static void cavs_flush(AVCodecContext * avctx)
1172 {
1173  AVSContext *h = avctx->priv_data;
1174  h->got_keyframe = 0;
1175 }
1176 
1177 static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1178  AVPacket *avpkt)
1179 {
1180  AVSContext *h = avctx->priv_data;
1181  const uint8_t *buf = avpkt->data;
1182  int buf_size = avpkt->size;
1183  uint32_t stc = -1;
1184  int input_size, ret;
1185  const uint8_t *buf_end;
1186  const uint8_t *buf_ptr;
1187 
1188  if (buf_size == 0) {
1189  if (!h->low_delay && h->DPB[0].f->data[0]) {
1190  *got_frame = 1;
1191  av_frame_move_ref(data, h->DPB[0].f);
1192  }
1193  return 0;
1194  }
1195 
1196  h->stc = 0;
1197 
1198  buf_ptr = buf;
1199  buf_end = buf + buf_size;
1200  for(;;) {
1201  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
1202  if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) {
1203  if (!h->stc)
1204  av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n");
1205  return FFMAX(0, buf_ptr - buf);
1206  }
1207  input_size = (buf_end - buf_ptr) * 8;
1208  switch (stc) {
1209  case CAVS_START_CODE:
1210  init_get_bits(&h->gb, buf_ptr, input_size);
1211  decode_seq_header(h);
1212  break;
1213  case PIC_I_START_CODE:
1214  if (!h->got_keyframe) {
1215  av_frame_unref(h->DPB[0].f);
1216  av_frame_unref(h->DPB[1].f);
1217  h->got_keyframe = 1;
1218  }
1219  case PIC_PB_START_CODE:
1220  *got_frame = 0;
1221  if (!h->got_keyframe)
1222  break;
1223  init_get_bits(&h->gb, buf_ptr, input_size);
1224  h->stc = stc;
1225  if (decode_pic(h))
1226  break;
1227  *got_frame = 1;
1228  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1229  if (h->DPB[!h->low_delay].f->data[0]) {
1230  if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0)
1231  return ret;
1232  } else {
1233  *got_frame = 0;
1234  }
1235  } else {
1236  av_frame_move_ref(data, h->cur.f);
1237  }
1238  break;
1239  case EXT_START_CODE:
1240  //mpeg_decode_extension(avctx, buf_ptr, input_size);
1241  break;
1242  case USER_START_CODE:
1243  //mpeg_decode_user_data(avctx, buf_ptr, input_size);
1244  break;
1245  default:
1246  if (stc <= SLICE_MAX_START_CODE) {
1247  init_get_bits(&h->gb, buf_ptr, input_size);
1248  decode_slice_header(h, &h->gb);
1249  }
1250  break;
1251  }
1252  }
1253 }
1254 
1255 AVCodec ff_cavs_decoder = {
1256  .name = "cavs",
1257  .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
1258  .type = AVMEDIA_TYPE_VIDEO,
1259  .id = AV_CODEC_ID_CAVS,
1260  .priv_data_size = sizeof(AVSContext),
1261  .init = ff_cavs_init,
1262  .close = ff_cavs_end,
1263  .decode = cavs_decode_frame,
1264  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1265  .flush = cavs_flush,
1266 };
AVSContext::intra_pred_c
void(* intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.h:231
AVSContext::top_border_v
uint8_t * top_border_v
Definition: cavs.h:225
show_bits_long
static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
Definition: get_bits.h:391
AVSContext::pic_structure
int pic_structure
Definition: cavs.h:181
AVSContext::top_border_u
uint8_t * top_border_u
Definition: cavs.h:225
ff_cavs_modify_mb_i
void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
Definition: cavs.c:364
NULL
#define NULL
Definition: coverity.c:32
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:3212
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static const struct dec_2dvlc chroma_dec[5]
Definition: cavsdec.c:350
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
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Definition: cavs.h:73
SLICE_MAX_START_CODE
#define SLICE_MAX_START_CODE
Definition: cavs.h:32
AVSContext::got_keyframe
int got_keyframe
Definition: cavs.h:241
AVSContext::avctx
AVCodecContext * avctx
Definition: cavs.h:164
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int inc_limit
Definition: cavs.h:154
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static int shift(int a, int b)
Definition: sonic.c:82
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Definition: cavs.h:239
h
h
Definition: vp9dsp_template.c:2093
AVSContext::direct_den
int direct_den[2]
for scaling in direct B block
Definition: cavs.h:236
CAVSDSPContext::cavs_idct8_add
void(* cavs_idct8_add)(uint8_t *dst, int16_t *block, int stride)
Definition: cavsdsp.h:37
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ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
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static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:496
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int cbp
Definition: cavs.h:220
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static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:183
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void(* clear_block)(int16_t *block)
Definition: blockdsp.h:35
ff_cavs_intra_mv
const cavs_vector ff_cavs_intra_mv
mark block as using intra prediction
Definition: cavsdata.c:69
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static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
I_8X8
Definition: cavs.h:62
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int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:209
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static void skip_bits_long(GetBitContext *s, int n)
Definition: get_bits.h:217
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Definition: cavs.h:144
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static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
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static const uint8_t dequant_shift[64]
Definition: cavsdec.c:54
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av_cold int ff_cavs_end(AVCodecContext *avctx)
Definition: cavs.c:835
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int mbidx
macroblock coordinates
Definition: cavs.h:186
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#define BWD1
Definition: cavs.h:52
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static const uint8_t scan3x3[4]
Definition: cavsdec.c:52
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const uint8_t ff_cavs_chroma_qp[64]
Definition: cavsdata.c:57
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Definition: cavs.h:207
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Definition: cavs.h:160
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Definition: cavs.h:69
SYM1
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Definition: cavs.h:54
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Definition: avcodec.h:1468
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initialise predictors for motion vectors and intra prediction
Definition: cavs.c:632
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void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:496
P_8X16
Definition: cavs.h:66
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int qp
Definition: cavs.h:217
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Definition: idctdsp.h:31
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Definition: svq3.c:149
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int loop_filter_disable
Definition: cavs.h:183
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Definition: avcodec.h:3392
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static int decode_seq_header(AVSContext *h)
Definition: cavsdec.c:1121
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Definition: cavs.h:61
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Definition: cavs.h:58
AV_CODEC_CAP_DELAY
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:881
AVSContext::mbx
int mbx
Definition: cavs.h:186
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static int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf, int16_t *dst, int mul, int shift, int coeff_num)
Definition: cavsdec.c:516
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Definition: cavs.h:221
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Definition: cavs.h:50
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Definition: cavsdec.c:634
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Definition: audio_convert.c:194
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int ref_flag
Definition: cavs.h:185
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#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
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uint8_t * top_qp
Definition: cavs.h:191
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int8_t rltab[59][3]
Definition: cavs.h:151
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int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:375
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static const uint8_t mv_scan[4]
Definition: cavsdec.c:36
AVSContext::mv
cavs_vector mv[2 *4 *3]
mv motion vector cache 0: D3 B2 B3 C2 4: A1 X0 X1 - 8: A3 X2 X3 -
Definition: cavs.h:205
AVSContext::width
int width
Definition: cavs.h:178
PIC_I_START_CODE
#define PIC_I_START_CODE
Definition: cavs.h:36
AVPacket::data
uint8_t * data
Definition: avcodec.h:1467
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static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:212
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int8_t golomb_order
Definition: cavs.h:153
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bitstream reader API header.
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static void cavs_flush(AVCodecContext *avctx)
Definition: cavsdec.c:1171
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void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
in-loop deblocking filter for a single macroblock
Definition: cavs.c:110
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Definition: opengl_enc.c:101
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int dist[2]
temporal distances from current frame to ref frames
Definition: cavs.h:173
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int mby
Definition: cavs.h:186
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Definition: cavs.h:170
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:48
AVSContext::cy
uint8_t * cy
Definition: cavs.h:189
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Definition: tableprint_vlc.h:28
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const uint8_t * avpriv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state)
m
unsigned m
Definition: audioconvert.c:187
U
#define U(x)
Definition: vp56_arith.h:37
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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uint8_t * cu
Definition: cavs.h:189
P_8X8
Definition: cavs.h:67
AVSContext::scale_den
int scale_den[2]
for scaling neighbouring MVs
Definition: cavs.h:237
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static int get_ue_golomb(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to 8190.
Definition: golomb.h:53
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static int decode_pic(AVSContext *h)
Definition: cavsdec.c:968
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int progressive
Definition: cavs.h:180
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AVSFrame cur
currently decoded frame
Definition: cavs.h:171
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static const uint16_t mask[17]
Definition: lzw.c:38
ff_cavs_next_mb
int ff_cavs_next_mb(AVSContext *h)
save predictors for later macroblocks and increase macroblock address
Definition: cavs.c:673
FF_SIGNBIT
#define FF_SIGNBIT(x)
Definition: internal.h:75
B_SUB_FWD
Definition: cavs.h:78
AVERROR
#define AVERROR(e)
Definition: error.h:43
ff_cavs_inter
void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
Definition: cavs.c:495
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CAVSDSPContext cdsp
Definition: cavs.h:169
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
r
const char * r
Definition: vf_curves.c:107
decode_slice_header
static int decode_slice_header(AVSContext *h, GetBitContext *gb)
Definition: cavsdec.c:911
decode_mb_p
static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
Definition: cavsdec.c:723
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static const uint8_t cbp_tab[64][2]
Definition: cavsdec.c:41
C_AVAIL
#define C_AVAIL
Definition: cavs.h:41
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
ff_cavs_load_intra_pred_luma
void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left, int block)
Definition: cavs.c:186
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3399
round
static av_always_inline av_const double round(double x)
Definition: libm.h:444
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
P_16X8
Definition: cavs.h:65
AVSContext::skip_mode_flag
int skip_mode_flag
select between skip_count or one skip_flag per MB
Definition: cavs.h:182
AVSContext::DPB
AVSFrame DPB[2]
reference frames
Definition: cavs.h:172
B_AVAIL
#define B_AVAIL
Definition: cavs.h:40
EOB
#define EOB
Definition: cavsdec.c:76
dequant_mul
static const uint16_t dequant_mul[64]
Definition: cavsdec.c:65
SYM0
#define SYM0
Definition: cavs.h:53
AVSContext::cv
uint8_t * cv
current MB sample pointers
Definition: cavs.h:189
ff_cavs_load_intra_pred_chroma
void ff_cavs_load_intra_pred_chroma(AVSContext *h)
Definition: cavs.c:237
check_for_slice
static int check_for_slice(AVSContext *h)
Definition: cavsdec.c:940
AVSContext::stream_revision
int stream_revision
0 for samples from 2006, 1 for rm52j encoder
Definition: cavs.h:179
AVSContext::pic_qp_fixed
int pic_qp_fixed
Definition: cavs.h:219
BLK_8X16
Definition: cavs.h:116
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:266
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:252
NOT_AVAIL
#define NOT_AVAIL
Definition: cavs.h:43
ff_cavs_init
av_cold int ff_cavs_init(AVCodecContext *avctx)
Definition: cavs.c:789
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
ff_cavs_decoder
AVCodec ff_cavs_decoder
Definition: cavsdec.c:1255
cavs_sub_mb
cavs_sub_mb
Definition: cavs.h:76
cavs_vector::dist
int16_t dist
Definition: cavs.h:146
AVSContext::left_border_u
uint8_t left_border_u[10]
Definition: cavs.h:226
ff_cavs_partition_flags
const uint8_t ff_cavs_partition_flags[30]
Definition: cavsdata.c:24
AVSContext::block
int16_t * block
Definition: cavs.h:242
ESCAPE_CODE
#define ESCAPE_CODE
Definition: cavs.h:47
AVSContext::intra_pred_l
void(* intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.h:230
show_bits
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:295
ff_cavs_init_top_lines
int ff_cavs_init_top_lines(AVSContext *h)
some predictions require data from the top-neighbouring macroblock.
Definition: cavs.c:754
ff_cavs_dir_mv
const cavs_vector ff_cavs_dir_mv
mark block as "no prediction from this direction" e.g.
Definition: cavsdata.c:66
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
EXT_START_CODE
#define EXT_START_CODE
Definition: cavs.h:33
B_SUB_SYM
Definition: cavs.h:80
AVSContext::left_border_v
uint8_t left_border_v[10]
Definition: cavs.h:226
AVSContext::level
int level
Definition: cavs.h:175
src
#define src
Definition: vp9dsp.c:530
ff_cavs_mv
void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, enum cavs_mv_pred mode, enum cavs_block size, int ref)
Definition: cavs.c:577
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
decode_residual_chroma
static void decode_residual_chroma(AVSContext *h)
Definition: cavsdec.c:594
align
const AVS_VideoInfo int align
Definition: avisynth_c.h:658
TMP_UNUSED_INX
#define TMP_UNUSED_INX
BLK_16X8
Definition: cavs.h:115
dec_2dvlc::max_run
int8_t max_run
Definition: cavs.h:155
mv_pred_direct
static void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw, cavs_vector *col_mv)
Definition: cavsdec.c:464
cavs_vector
Definition: cavs.h:143
avcodec.h
Libavcodec external API header.
BWD0
#define BWD0
Definition: cavs.h:51
decode_mb_b
static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
Definition: cavsdec.c:768
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
AVCodecContext
main external API structure.
Definition: avcodec.h:1532
AVSContext::sym_factor
int sym_factor
for scaling in symmetrical B block
Definition: cavs.h:235
USER_START_CODE
#define USER_START_CODE
Definition: cavs.h:34
AVSContext::pred_mode_Y
int pred_mode_Y[3 *3]
luma pred mode cache 0: – B2 B3 3: A1 X0 X1 6: A3 X2 X3
Definition: cavs.h:213
mpeg12data.h
MPEG1/2 tables.
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:894
cavs_block
cavs_block
Definition: cavs.h:113
B_SUB_BWD
Definition: cavs.h:79
buf
void * buf
Definition: avisynth_c.h:553
AVSContext::top_pred_Y
int * top_pred_Y
Definition: cavs.h:214
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:312
height
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
skip_bits1
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:337
cavs_decode_frame
static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: cavsdec.c:1177
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:305
CAVS_START_CODE
#define CAVS_START_CODE
Definition: cavs.h:35
intra_dec
static const struct dec_2dvlc intra_dec[7]
Definition: cavsdec.c:78
cavs_vector::ref
int16_t ref
Definition: cavs.h:147
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418
dec_2dvlc::level_add
int8_t level_add[27]
Definition: cavs.h:152
AVSContext::height
int height
Definition: cavs.h:178
AVSContext::alpha_offset
int alpha_offset
Definition: cavs.h:184
P_16X16
Definition: cavs.h:64
store_mvs
static void store_mvs(AVSContext *h)
Definition: cavsdec.c:456
AVSContext::profile
int profile
Definition: cavs.h:175
AVSContext::c_stride
ptrdiff_t c_stride
Definition: cavs.h:215
PIC_PB_START_CODE
#define PIC_PB_START_CODE
Definition: cavs.h:37
AVSContext::stc
int stc
last start code
Definition: cavs.h:188
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:474
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
AVSContext::bdsp
BlockDSPContext bdsp
Definition: cavs.h:165
flags
static int flags
Definition: cpu.c:47
AV_CODEC_ID_CAVS
Definition: avcodec.h:194
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
level
uint8_t level
Definition: svq3.c:150
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:572
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
internal.h
common internal api header.
AVSContext::qp_fixed
int qp_fixed
Definition: cavs.h:218
AVSFrame
Definition: cavs.h:158
mv_pred_sym
static void mv_pred_sym(AVSContext *h, cavs_vector *src, enum cavs_block size)
Definition: cavsdec.c:483
AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:268
AVSContext::flags
int flags
availability flags of neighbouring macroblocks
Definition: cavs.h:187
AVSContext::l_stride
ptrdiff_t l_stride
Definition: cavs.h:215
P_SKIP
Definition: cavs.h:63
AVSContext::luma_scan
int luma_scan[4]
Definition: cavs.h:216
get_ue_code
static int get_ue_code(GetBitContext *gb, int order)
kth-order exponential golomb code
Definition: cavsdec.c:503
AVSContext::mb_height
int mb_height
Definition: cavs.h:177
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1574
AVSContext::beta_offset
int beta_offset
Definition: cavs.h:184
ff_cavs_init_pic
int ff_cavs_init_pic(AVSContext *h)
Definition: cavs.c:718
inter_dec
static const struct dec_2dvlc inter_dec[7]
Definition: cavsdec.c:214
decode_mb_i
static int decode_mb_i(AVSContext *h, int cbp_code)
Definition: cavsdec.c:644
decode_residual_block
static int decode_residual_block(AVSContext *h, GetBitContext *gb, const struct dec_2dvlc *r, int esc_golomb_order, int qp, uint8_t *dst, int stride)
decode coefficients from one 8x8 block, dequantize, inverse transform and add them to sample block ...
Definition: cavsdec.c:546
BLK_8X8
Definition: cavs.h:117
dec_2dvlc
Definition: cavs.h:150
FWD0
#define FWD0
Definition: cavs.h:49
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
set_mvs
static void set_mvs(cavs_vector *mv, enum cavs_block size)
Definition: cavs.h:250
B_SKIP
Definition: cavs.h:68
AVSContext::aspect_ratio
int aspect_ratio
Definition: cavs.h:176
decode_residual_inter
static int decode_residual_inter(AVSContext *h)
Definition: cavsdec.c:604
FFSWAP
#define FFSWAP(type, a, b)
Definition: common.h:99
set_intra_mode_default
static void set_intra_mode_default(AVSContext *h)
Definition: cavsdec.c:712
cavs_vector::y
int16_t y
Definition: cavs.h:145
golomb.h
exp golomb vlc stuff
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1444
AV_GET_BUFFER_FLAG_REF
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1241
ff_mpeg12_frame_rate_tab
const AVRational ff_mpeg12_frame_rate_tab[16]
Definition: mpeg12data.c:308
av_mallocz
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
AVSContext::mb_width
int mb_width
Definition: cavs.h:177
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:856
AVSFrame::f
AVFrame * f
Definition: cavs.h:159
AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:267
AVSContext::low_delay
int low_delay
Definition: cavs.h:174
AVSContext::col_type_base
uint8_t * col_type_base
Definition: cavs.h:232
width
static int width
Definition: demuxing_decoding.c:39
block
static int16_t block[64]
Definition: dct-test.c:112
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