FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
cavsdec.c
Go to the documentation of this file.
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] = {
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  unsigned 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) {
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  */
547  const struct dec_2dvlc *r, int esc_golomb_order,
548  int qp, uint8_t *dst, ptrdiff_t 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 
595 {
596  if (h->cbp & (1 << 4)) {
597  int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
598  ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride);
599  if (ret < 0)
600  return ret;
601  }
602  if (h->cbp & (1 << 5)) {
603  int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
604  ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride);
605  if (ret < 0)
606  return ret;
607  }
608  return 0;
609 }
610 
611 static inline int decode_residual_inter(AVSContext *h)
612 {
613  int block;
614 
615  /* get coded block pattern */
616  int cbp = get_ue_golomb(&h->gb);
617  if (cbp > 63U) {
618  av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
619  return AVERROR_INVALIDDATA;
620  }
621  h->cbp = cbp_tab[cbp][1];
622 
623  /* get quantizer */
624  if (h->cbp && !h->qp_fixed)
625  h->qp = (h->qp + (unsigned)get_se_golomb(&h->gb)) & 63;
626  for (block = 0; block < 4; block++)
627  if (h->cbp & (1 << block))
628  decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
629  h->cy + h->luma_scan[block], h->l_stride);
631 
632  return 0;
633 }
634 
635 /*****************************************************************************
636  *
637  * macroblock level
638  *
639  ****************************************************************************/
640 
641 static inline void set_mv_intra(AVSContext *h)
642 {
644  set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
646  set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
647  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B)
648  h->col_type_base[h->mbidx] = I_8X8;
649 }
650 
651 static int decode_mb_i(AVSContext *h, int cbp_code)
652 {
653  GetBitContext *gb = &h->gb;
654  unsigned pred_mode_uv;
655  int block;
656  uint8_t top[18];
657  uint8_t *left = NULL;
658  uint8_t *d;
659  int ret;
660 
661  ff_cavs_init_mb(h);
662 
663  /* get intra prediction modes from stream */
664  for (block = 0; block < 4; block++) {
665  int nA, nB, predpred;
666  int pos = scan3x3[block];
667 
668  nA = h->pred_mode_Y[pos - 1];
669  nB = h->pred_mode_Y[pos - 3];
670  predpred = FFMIN(nA, nB);
671  if (predpred == NOT_AVAIL) // if either is not available
672  predpred = INTRA_L_LP;
673  if (!get_bits1(gb)) {
674  int rem_mode = get_bits(gb, 2);
675  predpred = rem_mode + (rem_mode >= predpred);
676  }
677  h->pred_mode_Y[pos] = predpred;
678  }
679  pred_mode_uv = get_ue_golomb(gb);
680  if (pred_mode_uv > 6) {
681  av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
682  return AVERROR_INVALIDDATA;
683  }
684  ff_cavs_modify_mb_i(h, &pred_mode_uv);
685 
686  /* get coded block pattern */
687  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
688  cbp_code = get_ue_golomb(gb);
689  if (cbp_code > 63U) {
690  av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
691  return AVERROR_INVALIDDATA;
692  }
693  h->cbp = cbp_tab[cbp_code][0];
694  if (h->cbp && !h->qp_fixed)
695  h->qp = (h->qp + (unsigned)get_se_golomb(gb)) & 63; //qp_delta
696 
697  /* luma intra prediction interleaved with residual decode/transform/add */
698  for (block = 0; block < 4; block++) {
699  d = h->cy + h->luma_scan[block];
700  ff_cavs_load_intra_pred_luma(h, top, &left, block);
702  (d, top, left, h->l_stride);
703  if (h->cbp & (1<<block)) {
704  ret = decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
705  if (ret < 0)
706  return ret;
707  }
708  }
709 
710  /* chroma intra prediction */
712  h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
713  h->left_border_u, h->c_stride);
714  h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
715  h->left_border_v, h->c_stride);
716 
717  ret = decode_residual_chroma(h);
718  if (ret < 0)
719  return ret;
720  ff_cavs_filter(h, I_8X8);
721  set_mv_intra(h);
722  return 0;
723 }
724 
725 static inline void set_intra_mode_default(AVSContext *h)
726 {
727  if (h->stream_revision > 0) {
728  h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
729  h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
730  } else {
731  h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
732  h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
733  }
734 }
735 
736 static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
737 {
738  GetBitContext *gb = &h->gb;
739  int ref[4];
740 
741  ff_cavs_init_mb(h);
742  switch (mb_type) {
743  case P_SKIP:
745  break;
746  case P_16X16:
747  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
749  break;
750  case P_16X8:
751  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
752  ref[2] = h->ref_flag ? 0 : get_bits1(gb);
755  break;
756  case P_8X16:
757  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
758  ref[1] = h->ref_flag ? 0 : get_bits1(gb);
761  break;
762  case P_8X8:
763  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
764  ref[1] = h->ref_flag ? 0 : get_bits1(gb);
765  ref[2] = h->ref_flag ? 0 : get_bits1(gb);
766  ref[3] = h->ref_flag ? 0 : get_bits1(gb);
771  }
772  ff_cavs_inter(h, mb_type);
774  store_mvs(h);
775  if (mb_type != P_SKIP)
777  ff_cavs_filter(h, mb_type);
778  h->col_type_base[h->mbidx] = mb_type;
779 }
780 
781 static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
782 {
783  int block;
784  enum cavs_sub_mb sub_type[4];
785  int flags;
786 
787  ff_cavs_init_mb(h);
788 
789  /* reset all MVs */
791  set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
793  set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
794  switch (mb_type) {
795  case B_SKIP:
796  case B_DIRECT:
797  if (!h->col_type_base[h->mbidx]) {
798  /* intra MB at co-location, do in-plane prediction */
801  } else
802  /* direct prediction from co-located P MB, block-wise */
803  for (block = 0; block < 4; block++)
804  mv_pred_direct(h, &h->mv[mv_scan[block]],
805  &h->col_mv[h->mbidx * 4 + block]);
806  break;
807  case B_FWD_16X16:
809  break;
810  case B_SYM_16X16:
812  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
813  break;
814  case B_BWD_16X16:
816  break;
817  case B_8X8:
818 #define TMP_UNUSED_INX 7
819  flags = 0;
820  for (block = 0; block < 4; block++)
821  sub_type[block] = get_bits(&h->gb, 2);
822  for (block = 0; block < 4; block++) {
823  switch (sub_type[block]) {
824  case B_SUB_DIRECT:
825  if (!h->col_type_base[h->mbidx]) {
826  /* intra MB at co-location, do in-plane prediction */
827  if(flags==0) {
828  // if col-MB is a Intra MB, current Block size is 16x16.
829  // AVS standard section 9.9.1
830  if(block>0){
831  h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ];
833  }
835  MV_PRED_BSKIP, BLK_8X8, 1);
838  MV_PRED_BSKIP, BLK_8X8, 0);
839  if(block>0) {
840  flags = mv_scan[block];
841  h->mv[flags ] = h->mv[MV_FWD_X0 ];
842  h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
843  h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ];
845  } else
846  flags = MV_FWD_X0;
847  } else {
848  h->mv[mv_scan[block] ] = h->mv[flags ];
849  h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS];
850  }
851  } else
852  mv_pred_direct(h, &h->mv[mv_scan[block]],
853  &h->col_mv[h->mbidx * 4 + block]);
854  break;
855  case B_SUB_FWD:
856  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
857  MV_PRED_MEDIAN, BLK_8X8, 1);
858  break;
859  case B_SUB_SYM:
860  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
861  MV_PRED_MEDIAN, BLK_8X8, 1);
862  mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
863  break;
864  }
865  }
866 #undef TMP_UNUSED_INX
867  for (block = 0; block < 4; block++) {
868  if (sub_type[block] == B_SUB_BWD)
869  ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
870  mv_scan[block] + MV_BWD_OFFS - 3,
871  MV_PRED_MEDIAN, BLK_8X8, 0);
872  }
873  break;
874  default:
875  if (mb_type <= B_SYM_16X16) {
876  av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
877  return AVERROR_INVALIDDATA;
878  }
879  av_assert2(mb_type < B_8X8);
880  flags = ff_cavs_partition_flags[mb_type];
881  if (mb_type & 1) { /* 16x8 macroblock types */
882  if (flags & FWD0)
884  if (flags & SYM0)
885  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
886  if (flags & FWD1)
888  if (flags & SYM1)
889  mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
890  if (flags & BWD0)
892  if (flags & BWD1)
894  } else { /* 8x16 macroblock types */
895  if (flags & FWD0)
897  if (flags & SYM0)
898  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
899  if (flags & FWD1)
901  if (flags & SYM1)
902  mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
903  if (flags & BWD0)
905  if (flags & BWD1)
907  }
908  }
909  ff_cavs_inter(h, mb_type);
911  if (mb_type != B_SKIP)
913  ff_cavs_filter(h, mb_type);
914 
915  return 0;
916 }
917 
918 /*****************************************************************************
919  *
920  * slice level
921  *
922  ****************************************************************************/
923 
925 {
926  if (h->stc > 0xAF)
927  av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
928 
929  if (h->stc >= h->mb_height) {
930  av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc);
931  return AVERROR_INVALIDDATA;
932  }
933 
934  h->mby = h->stc;
935  h->mbidx = h->mby * h->mb_width;
936 
937  /* mark top macroblocks as unavailable */
938  h->flags &= ~(B_AVAIL | C_AVAIL);
939  if (!h->pic_qp_fixed) {
940  h->qp_fixed = get_bits1(gb);
941  h->qp = get_bits(gb, 6);
942  }
943  /* inter frame or second slice can have weighting params */
944  if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
945  (!h->pic_structure && h->mby >= h->mb_width / 2))
946  if (get_bits1(gb)) { //slice_weighting_flag
948  "weighted prediction not yet supported\n");
949  }
950  return 0;
951 }
952 
953 static inline int check_for_slice(AVSContext *h)
954 {
955  GetBitContext *gb = &h->gb;
956  int align;
957 
958  if (h->mbx)
959  return 0;
960  align = (-get_bits_count(gb)) & 7;
961  /* check for stuffing byte */
962  if (!align && (show_bits(gb, 8) == 0x80))
963  align = 8;
964  if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
965  skip_bits_long(gb, 24 + align);
966  h->stc = get_bits(gb, 8);
967  if (h->stc >= h->mb_height)
968  return 0;
969  decode_slice_header(h, gb);
970  return 1;
971  }
972  return 0;
973 }
974 
975 /*****************************************************************************
976  *
977  * frame level
978  *
979  ****************************************************************************/
980 
981 static int decode_pic(AVSContext *h)
982 {
983  int ret;
984  int skip_count = -1;
985  enum cavs_mb mb_type;
986 
987  if (!h->top_qp) {
988  av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n");
989  return AVERROR_INVALIDDATA;
990  }
991 
992  av_frame_unref(h->cur.f);
993 
994  skip_bits(&h->gb, 16);//bbv_dwlay
995  if (h->stc == PIC_PB_START_CODE) {
996  h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
997  if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
998  av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
999  return AVERROR_INVALIDDATA;
1000  }
1001  /* make sure we have the reference frames we need */
1002  if (!h->DPB[0].f->data[0] ||
1003  (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
1004  return AVERROR_INVALIDDATA;
1005  } else {
1007  if (get_bits1(&h->gb))
1008  skip_bits(&h->gb, 24);//time_code
1009  /* old sample clips were all progressive and no low_delay,
1010  bump stream revision if detected otherwise */
1011  if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
1012  h->stream_revision = 1;
1013  /* similarly test top_field_first and repeat_first_field */
1014  else if (show_bits(&h->gb, 11) & 3)
1015  h->stream_revision = 1;
1016  if (h->stream_revision > 0)
1017  skip_bits(&h->gb, 1); //marker_bit
1018  }
1019 
1020  ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
1022  if (ret < 0)
1023  return ret;
1024 
1025  if (!h->edge_emu_buffer) {
1026  int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
1027  h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
1028  if (!h->edge_emu_buffer)
1029  return AVERROR(ENOMEM);
1030  }
1031 
1032  if ((ret = ff_cavs_init_pic(h)) < 0)
1033  return ret;
1034  h->cur.poc = get_bits(&h->gb, 8) * 2;
1035 
1036  /* get temporal distances and MV scaling factors */
1037  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1038  h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511;
1039  } else {
1040  h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511;
1041  }
1042  h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511;
1043  h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
1044  h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
1045  if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
1046  h->sym_factor = h->dist[0] * h->scale_den[1];
1047  if (FFABS(h->sym_factor) > 32768) {
1048  av_log(h->avctx, AV_LOG_ERROR, "sym_factor %d too large\n", h->sym_factor);
1049  return AVERROR_INVALIDDATA;
1050  }
1051  } else {
1052  h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
1053  h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
1054  }
1055 
1056  if (h->low_delay)
1057  get_ue_golomb(&h->gb); //bbv_check_times
1058  h->progressive = get_bits1(&h->gb);
1059  h->pic_structure = 1;
1060  if (!h->progressive)
1061  h->pic_structure = get_bits1(&h->gb);
1062  if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
1063  skip_bits1(&h->gb); //advanced_pred_mode_disable
1064  skip_bits1(&h->gb); //top_field_first
1065  skip_bits1(&h->gb); //repeat_first_field
1066  h->pic_qp_fixed =
1067  h->qp_fixed = get_bits1(&h->gb);
1068  h->qp = get_bits(&h->gb, 6);
1069  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1070  if (!h->progressive && !h->pic_structure)
1071  skip_bits1(&h->gb);//what is this?
1072  skip_bits(&h->gb, 4); //reserved bits
1073  } else {
1074  if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
1075  h->ref_flag = get_bits1(&h->gb);
1076  skip_bits(&h->gb, 4); //reserved bits
1077  h->skip_mode_flag = get_bits1(&h->gb);
1078  }
1079  h->loop_filter_disable = get_bits1(&h->gb);
1080  if (!h->loop_filter_disable && get_bits1(&h->gb)) {
1081  h->alpha_offset = get_se_golomb(&h->gb);
1082  h->beta_offset = get_se_golomb(&h->gb);
1083  if ( h->alpha_offset < -64 || h->alpha_offset > 64
1084  || h-> beta_offset < -64 || h-> beta_offset > 64) {
1085  h->alpha_offset = h->beta_offset = 0;
1086  return AVERROR_INVALIDDATA;
1087  }
1088  } else {
1089  h->alpha_offset = h->beta_offset = 0;
1090  }
1091 
1092  ret = 0;
1093  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1094  do {
1095  check_for_slice(h);
1096  ret = decode_mb_i(h, 0);
1097  if (ret < 0)
1098  break;
1099  } while (ff_cavs_next_mb(h));
1100  } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
1101  do {
1102  if (check_for_slice(h))
1103  skip_count = -1;
1104  if (h->skip_mode_flag && (skip_count < 0))
1105  skip_count = get_ue_golomb(&h->gb);
1106  if (h->skip_mode_flag && skip_count--) {
1107  decode_mb_p(h, P_SKIP);
1108  } else {
1109  mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
1110  if (mb_type > P_8X8)
1111  ret = decode_mb_i(h, mb_type - P_8X8 - 1);
1112  else
1113  decode_mb_p(h, mb_type);
1114  }
1115  if (ret < 0)
1116  break;
1117  } while (ff_cavs_next_mb(h));
1118  } else { /* AV_PICTURE_TYPE_B */
1119  do {
1120  if (check_for_slice(h))
1121  skip_count = -1;
1122  if (h->skip_mode_flag && (skip_count < 0))
1123  skip_count = get_ue_golomb(&h->gb);
1124  if (h->skip_mode_flag && skip_count--) {
1125  ret = decode_mb_b(h, B_SKIP);
1126  } else {
1127  mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
1128  if (mb_type > B_8X8)
1129  ret = decode_mb_i(h, mb_type - B_8X8 - 1);
1130  else
1131  ret = decode_mb_b(h, mb_type);
1132  }
1133  if (ret < 0)
1134  break;
1135  } while (ff_cavs_next_mb(h));
1136  }
1137  emms_c();
1138  if (ret >= 0 && h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1139  av_frame_unref(h->DPB[1].f);
1140  FFSWAP(AVSFrame, h->cur, h->DPB[1]);
1141  FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
1142  }
1143  return ret;
1144 }
1145 
1146 /*****************************************************************************
1147  *
1148  * headers and interface
1149  *
1150  ****************************************************************************/
1151 
1153 {
1154  int frame_rate_code;
1155  int width, height;
1156  int ret;
1157 
1158  h->profile = get_bits(&h->gb, 8);
1159  h->level = get_bits(&h->gb, 8);
1160  skip_bits1(&h->gb); //progressive sequence
1161 
1162  width = get_bits(&h->gb, 14);
1163  height = get_bits(&h->gb, 14);
1164  if ((h->width || h->height) && (h->width != width || h->height != height)) {
1166  "Width/height changing in CAVS");
1167  return AVERROR_PATCHWELCOME;
1168  }
1169  if (width <= 0 || height <= 0) {
1170  av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
1171  return AVERROR_INVALIDDATA;
1172  }
1173  skip_bits(&h->gb, 2); //chroma format
1174  skip_bits(&h->gb, 3); //sample_precision
1175  h->aspect_ratio = get_bits(&h->gb, 4);
1176  frame_rate_code = get_bits(&h->gb, 4);
1177  if (frame_rate_code == 0 || frame_rate_code > 13) {
1179  "frame_rate_code %d is invalid\n", frame_rate_code);
1180  frame_rate_code = 1;
1181  }
1182 
1183  skip_bits(&h->gb, 18); //bit_rate_lower
1184  skip_bits1(&h->gb); //marker_bit
1185  skip_bits(&h->gb, 12); //bit_rate_upper
1186  h->low_delay = get_bits1(&h->gb);
1187 
1188  ret = ff_set_dimensions(h->avctx, width, height);
1189  if (ret < 0)
1190  return ret;
1191 
1192  h->width = width;
1193  h->height = height;
1194  h->mb_width = (h->width + 15) >> 4;
1195  h->mb_height = (h->height + 15) >> 4;
1196  h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
1197  if (!h->top_qp)
1198  return ff_cavs_init_top_lines(h);
1199  return 0;
1200 }
1201 
1202 static void cavs_flush(AVCodecContext * avctx)
1203 {
1204  AVSContext *h = avctx->priv_data;
1205  h->got_keyframe = 0;
1206 }
1207 
1208 static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1209  AVPacket *avpkt)
1210 {
1211  AVSContext *h = avctx->priv_data;
1212  const uint8_t *buf = avpkt->data;
1213  int buf_size = avpkt->size;
1214  uint32_t stc = -1;
1215  int input_size, ret;
1216  const uint8_t *buf_end;
1217  const uint8_t *buf_ptr;
1218 
1219  if (buf_size == 0) {
1220  if (!h->low_delay && h->DPB[0].f->data[0]) {
1221  *got_frame = 1;
1222  av_frame_move_ref(data, h->DPB[0].f);
1223  }
1224  return 0;
1225  }
1226 
1227  h->stc = 0;
1228 
1229  buf_ptr = buf;
1230  buf_end = buf + buf_size;
1231  for(;;) {
1232  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
1233  if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) {
1234  if (!h->stc)
1235  av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n");
1236  return FFMAX(0, buf_ptr - buf);
1237  }
1238  input_size = (buf_end - buf_ptr) * 8;
1239  switch (stc) {
1240  case CAVS_START_CODE:
1241  init_get_bits(&h->gb, buf_ptr, input_size);
1242  decode_seq_header(h);
1243  break;
1244  case PIC_I_START_CODE:
1245  if (!h->got_keyframe) {
1246  av_frame_unref(h->DPB[0].f);
1247  av_frame_unref(h->DPB[1].f);
1248  h->got_keyframe = 1;
1249  }
1250  case PIC_PB_START_CODE:
1251  if (*got_frame)
1252  av_frame_unref(data);
1253  *got_frame = 0;
1254  if (!h->got_keyframe)
1255  break;
1256  init_get_bits(&h->gb, buf_ptr, input_size);
1257  h->stc = stc;
1258  if (decode_pic(h))
1259  break;
1260  *got_frame = 1;
1261  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1262  if (h->DPB[!h->low_delay].f->data[0]) {
1263  if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0)
1264  return ret;
1265  } else {
1266  *got_frame = 0;
1267  }
1268  } else {
1269  av_frame_move_ref(data, h->cur.f);
1270  }
1271  break;
1272  case EXT_START_CODE:
1273  //mpeg_decode_extension(avctx, buf_ptr, input_size);
1274  break;
1275  case USER_START_CODE:
1276  //mpeg_decode_user_data(avctx, buf_ptr, input_size);
1277  break;
1278  default:
1279  if (stc <= SLICE_MAX_START_CODE) {
1280  init_get_bits(&h->gb, buf_ptr, input_size);
1281  decode_slice_header(h, &h->gb);
1282  }
1283  break;
1284  }
1285  }
1286 }
1287 
1289  .name = "cavs",
1290  .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
1291  .type = AVMEDIA_TYPE_VIDEO,
1292  .id = AV_CODEC_ID_CAVS,
1293  .priv_data_size = sizeof(AVSContext),
1294  .init = ff_cavs_init,
1295  .close = ff_cavs_end,
1297  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1298  .flush = cavs_flush,
1299 };
uint8_t * top_border_v
Definition: cavs.h:225
static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
Definition: get_bits.h:587
int pic_structure
Definition: cavs.h:181
uint8_t * top_border_u
Definition: cavs.h:225
void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
Definition: cavs.c:363
#define NULL
Definition: coverity.c:32
AVRational framerate
Definition: avcodec.h:3073
static const struct dec_2dvlc chroma_dec[5]
Definition: cavsdec.c:350
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
Definition: cavs.h:73
int got_keyframe
Definition: cavs.h:241
AVCodecContext * avctx
Definition: cavs.h:164
int inc_limit
Definition: cavs.h:154
static int shift(int a, int b)
Definition: sonic.c:82
uint8_t * edge_emu_buffer
Definition: cavs.h:239
int direct_den[2]
for scaling in direct B block
Definition: cavs.h:236
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static void flush(AVCodecContext *avctx)
int cbp
Definition: cavs.h:220
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:237
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:36
const cavs_vector ff_cavs_intra_mv
mark block as using intra prediction
Definition: cavsdata.c:69
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:381
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
Definition: cavs.h:62
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:104
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
Definition: get_bits.h:293
int16_t x
Definition: cavs.h:144
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static const uint8_t dequant_shift[64]
Definition: cavsdec.c:54
av_cold int ff_cavs_end(AVCodecContext *avctx)
Definition: cavs.c:840
int mbidx
macroblock coordinates
Definition: cavs.h:186
#define BWD1
Definition: cavs.h:52
static const uint8_t scan3x3[4]
Definition: cavsdec.c:52
const uint8_t ff_cavs_chroma_qp[64]
Definition: cavsdata.c:57
cavs_vector * col_mv
Definition: cavs.h:207
int poc
Definition: cavs.h:160
Definition: cavs.h:69
#define SYM1
Definition: cavs.h:54
int size
Definition: avcodec.h:1453
void ff_cavs_init_mb(AVSContext *h)
initialise predictors for motion vectors and intra prediction
Definition: cavs.c:637
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:582
Definition: cavs.h:66
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int qp
Definition: cavs.h:217
uint8_t permutated[64]
Definition: idctdsp.h:33
uint8_t run
Definition: svq3.c:206
int loop_filter_disable
Definition: cavs.h:183
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3441
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
static int decode_seq_header(AVSContext *h)
Definition: cavsdec.c:1152
cavs_mb
Definition: cavs.h:61
static int16_t block[64]
Definition: dct.c:115
#define MV_BWD_OFFS
Definition: cavs.h:58
#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:993
int mbx
Definition: cavs.h:186
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
ScanTable scantable
Definition: cavs.h:221
#define FWD1
Definition: cavs.h:50
static void set_mv_intra(AVSContext *h)
Definition: cavsdec.c:641
#define SLICE_MAX_START_CODE
Definition: avs2_parser.c:24
uint8_t
int ref_flag
Definition: cavs.h:185
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
static int decode_residual_block(AVSContext *h, GetBitContext *gb, const struct dec_2dvlc *r, int esc_golomb_order, int qp, uint8_t *dst, ptrdiff_t stride)
decode coefficients from one 8x8 block, dequantize, inverse transform and add them to sample block ...
Definition: cavsdec.c:546
uint8_t * top_qp
Definition: cavs.h:191
int8_t rltab[59][3]
Definition: cavs.h:151
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:443
static const uint8_t mv_scan[4]
Definition: cavsdec.c:36
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
int width
Definition: cavs.h:178
#define PIC_I_START_CODE
Definition: cavs.h:36
#define height
uint8_t * data
Definition: avcodec.h:1452
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
int8_t golomb_order
Definition: cavs.h:153
bitstream reader API header.
static void cavs_flush(AVCodecContext *avctx)
Definition: cavsdec.c:1202
void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
in-loop deblocking filter for a single macroblock
Definition: cavs.c:109
ptrdiff_t size
Definition: opengl_enc.c:101
int dist[2]
temporal distances from current frame to ref frames
Definition: cavs.h:173
int mby
Definition: cavs.h:186
static int decode_residual_chroma(AVSContext *h)
Definition: cavsdec.c:594
GetBitContext gb
Definition: cavs.h:170
#define FFALIGN(x, a)
Definition: macros.h:48
uint8_t * cy
Definition: cavs.h:189
#define av_log(a,...)
const uint8_t * avpriv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state)
#define U(x)
Definition: vp56_arith.h:37
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint8_t * cu
Definition: cavs.h:189
Definition: cavs.h:67
int scale_den[2]
for scaling neighbouring MVs
Definition: cavs.h:237
static int get_ue_golomb(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to 8190.
Definition: golomb.h:53
static int decode_pic(AVSContext *h)
Definition: cavsdec.c:981
int progressive
Definition: cavs.h:180
AVSFrame cur
currently decoded frame
Definition: cavs.h:171
static const uint16_t mask[17]
Definition: lzw.c:38
int ff_cavs_next_mb(AVSContext *h)
save predictors for later macroblocks and increase macroblock address
Definition: cavs.c:678
#define FF_SIGNBIT(x)
Definition: internal.h:88
Definition: cavs.h:78
#define AVERROR(e)
Definition: error.h:43
void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
Definition: cavs.c:494
CAVSDSPContext cdsp
Definition: cavs.h:169
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
const char * r
Definition: vf_curves.c:114
static int decode_slice_header(AVSContext *h, GetBitContext *gb)
Definition: cavsdec.c:924
static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
Definition: cavsdec.c:736
static const uint8_t cbp_tab[64][2]
Definition: cavsdec.c:41
#define C_AVAIL
Definition: cavs.h:41
simple assert() macros that are a bit more flexible than ISO C assert().
void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left, int block)
Definition: cavs.c:185
const char * name
Name of the codec implementation.
Definition: avcodec.h:3448
static av_always_inline av_const double round(double x)
Definition: libm.h:444
#define FFMAX(a, b)
Definition: common.h:94
Definition: cavs.h:65
int skip_mode_flag
select between skip_count or one skip_flag per MB
Definition: cavs.h:182
AVSFrame DPB[2]
reference frames
Definition: cavs.h:172
#define B_AVAIL
Definition: cavs.h:40
#define EOB
Definition: cavsdec.c:76
static const uint16_t dequant_mul[64]
Definition: cavsdec.c:65
#define SYM0
Definition: cavs.h:53
uint8_t * cv
current MB sample pointers
Definition: cavs.h:189
void ff_cavs_load_intra_pred_chroma(AVSContext *h)
Definition: cavs.c:236
static int check_for_slice(AVSContext *h)
Definition: cavsdec.c:953
int stream_revision
0 for samples from 2006, 1 for rm52j encoder
Definition: cavs.h:179
int pic_qp_fixed
Definition: cavs.h:219
Definition: cavs.h:116
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:309
#define NOT_AVAIL
Definition: cavs.h:43
av_cold int ff_cavs_init(AVCodecContext *avctx)
Definition: cavs.c:794
#define FFMIN(a, b)
Definition: common.h:96
AVCodec ff_cavs_decoder
Definition: cavsdec.c:1288
cavs_sub_mb
Definition: cavs.h:76
int16_t dist
Definition: cavs.h:146
uint8_t left_border_u[10]
Definition: cavs.h:226
void(* intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
Definition: cavs.h:231
#define width
const uint8_t ff_cavs_partition_flags[30]
Definition: cavsdata.c:24
int16_t * block
Definition: cavs.h:242
#define ESCAPE_CODE
Definition: cavs.h:47
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:443
int ff_cavs_init_top_lines(AVSContext *h)
some predictions require data from the top-neighbouring macroblock.
Definition: cavs.c:759
const cavs_vector ff_cavs_dir_mv
mark block as "no prediction from this direction" e.g.
Definition: cavsdata.c:66
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define EXT_START_CODE
Definition: cavs.h:33
Definition: cavs.h:80
uint8_t left_border_v[10]
Definition: cavs.h:226
int level
Definition: cavs.h:175
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:575
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
const AVS_VideoInfo int align
Definition: avisynth_c.h:795
#define TMP_UNUSED_INX
Definition: cavs.h:115
int8_t max_run
Definition: cavs.h:155
static void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw, cavs_vector *col_mv)
Definition: cavsdec.c:464
Libavcodec external API header.
#define BWD0
Definition: cavs.h:51
static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
Definition: cavsdec.c:781
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:257
main external API structure.
Definition: avcodec.h:1540
int sym_factor
for scaling in symmetrical B block
Definition: cavs.h:235
#define USER_START_CODE
Definition: cavs.h:34
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
MPEG-1/2 tables.
cavs_block
Definition: cavs.h:113
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1919
Definition: cavs.h:79
void * buf
Definition: avisynth_c.h:690
int * top_pred_Y
Definition: cavs.h:214
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:487
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:523
static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: cavsdec.c:1208
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:460
void(* cavs_idct8_add)(uint8_t *dst, int16_t *block, ptrdiff_t stride)
Definition: cavsdsp.h:37
#define CAVS_START_CODE
Definition: cavs.h:35
static const struct dec_2dvlc intra_dec[7]
Definition: cavsdec.c:78
int16_t ref
Definition: cavs.h:147
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:615
int8_t level_add[27]
Definition: cavs.h:152
int height
Definition: cavs.h:178
int alpha_offset
Definition: cavs.h:184
Definition: cavs.h:64
static void store_mvs(AVSContext *h)
Definition: cavsdec.c:456
int profile
Definition: cavs.h:175
ptrdiff_t c_stride
Definition: cavs.h:215
#define PIC_PB_START_CODE
Definition: cavs.h:37
int stc
last start code
Definition: cavs.h:188
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:553
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define flags(name, subs,...)
Definition: cbs_av1.c:584
BlockDSPContext bdsp
Definition: cavs.h:165
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:240
uint8_t level
Definition: svq3.c:207
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal api header.
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
int qp_fixed
Definition: cavs.h:218
Definition: cavs.h:158
static void mv_pred_sym(AVSContext *h, cavs_vector *src, enum cavs_block size)
Definition: cavsdec.c:483
Bi-dir predicted.
Definition: avutil.h:276
int flags
availability flags of neighbouring macroblocks
Definition: cavs.h:187
ptrdiff_t l_stride
Definition: cavs.h:215
Definition: cavs.h:63
int luma_scan[4]
Definition: cavs.h:216
static int get_ue_code(GetBitContext *gb, int order)
kth-order exponential golomb code
Definition: cavsdec.c:503
int mb_height
Definition: cavs.h:177
void * priv_data
Definition: avcodec.h:1567
int beta_offset
Definition: cavs.h:184
int ff_cavs_init_pic(AVSContext *h)
Definition: cavs.c:723
static const struct dec_2dvlc inter_dec[7]
Definition: cavsdec.c:214
static int decode_mb_i(AVSContext *h, int cbp_code)
Definition: cavsdec.c:651
Definition: cavs.h:117
#define FWD0
Definition: cavs.h:49
static void set_mvs(cavs_vector *mv, enum cavs_block size)
Definition: cavs.h:250
Definition: cavs.h:68
int aspect_ratio
Definition: cavs.h:176
static int decode_residual_inter(AVSContext *h)
Definition: cavsdec.c:611
#define FFSWAP(type, a, b)
Definition: common.h:99
static void set_intra_mode_default(AVSContext *h)
Definition: cavsdec.c:725
int16_t y
Definition: cavs.h:145
void(* intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
Definition: cavs.h:230
exp golomb vlc stuff
This structure stores compressed data.
Definition: avcodec.h:1429
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1151
int mb_width
Definition: cavs.h:177
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:968
AVFrame * f
Definition: cavs.h:159
Predicted.
Definition: avutil.h:275
int low_delay
Definition: cavs.h:174
uint8_t * col_type_base
Definition: cavs.h:232
const AVRational ff_mpeg12_frame_rate_tab[]