FFmpeg
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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 #include "mpegvideo.h"
36 
37 static const uint8_t mv_scan[4] = {
38  MV_FWD_X0, MV_FWD_X1,
39  MV_FWD_X2, MV_FWD_X3
40 };
41 
42 static const uint8_t cbp_tab[64][2] = {
43  { 63, 0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, { 0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 },
44  { 7, 14 }, { 5, 11 }, { 10, 12 }, { 8, 5 }, { 12, 10 }, { 61, 7 }, { 4, 48 }, { 55, 3 },
45  { 1, 2 }, { 2, 8 }, { 59, 4 }, { 3, 1 }, { 62, 61 }, { 9, 55 }, { 6, 59 }, { 29, 62 },
46  { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53, 9 }, { 30, 6 },
47  { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 },
48  { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 },
49  { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 },
50  { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 }
51 };
52 
53 static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
54 
55 static const uint8_t dequant_shift[64] = {
56  14, 14, 14, 14, 14, 14, 14, 14,
57  13, 13, 13, 13, 13, 13, 13, 13,
58  13, 12, 12, 12, 12, 12, 12, 12,
59  11, 11, 11, 11, 11, 11, 11, 11,
60  11, 10, 10, 10, 10, 10, 10, 10,
61  10, 9, 9, 9, 9, 9, 9, 9,
62  9, 8, 8, 8, 8, 8, 8, 8,
63  7, 7, 7, 7, 7, 7, 7, 7
64 };
65 
66 static const uint16_t dequant_mul[64] = {
67  32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
68  32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
69  65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
70  32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
71  65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
72  65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
73  65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
74  32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
75 };
76 
77 #define EOB 0, 0, 0
78 
79 static const struct dec_2dvlc intra_dec[7] = {
80  {
81  { //level / run / table_inc
82  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
83  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
84  { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
85  { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 },
86  { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
87  { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 },
88  { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 },
89  { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 },
90  { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 },
91  { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB }
92  },
93  //level_add
94  { 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 },
95  2, //golomb_order
96  0, //inc_limit
97  23, //max_run
98  },
99  {
100  { //level / run
101  { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 },
102  { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
103  { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 },
104  { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 },
105  { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 },
106  { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 },
107  { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 },
108  { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 },
109  { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 },
110  { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 }
111  },
112  //level_add
113  { 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 },
114  2, //golomb_order
115  1, //inc_limit
116  15, //max_run
117  },
118  {
119  { //level / run
120  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 },
121  { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
122  { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
123  { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
124  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 },
125  { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
126  { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 },
127  { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 },
128  { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 },
129  { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 }
130  },
131  //level_add
132  { 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 },
133  2, //golomb_order
134  2, //inc_limit
135  10, //max_run
136  },
137  {
138  { //level / run
139  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
140  { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 },
141  { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 },
142  { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
143  { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
144  { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 },
145  { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 },
146  { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 },
147  { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 },
148  { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 }
149  },
150  //level_add
151  { 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 },
152  2, //golomb_order
153  4, //inc_limit
154  7, //max_run
155  },
156  {
157  { //level / run
158  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
159  { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
160  { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 },
161  { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 },
162  {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 },
163  {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 },
164  {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 },
165  { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 },
166  {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 },
167  { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 }
168  },
169  //level_add
170  { 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 },
171  2, //golomb_order
172  7, //inc_limit
173  5, //max_run
174  },
175  {
176  { //level / run
177  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
178  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
179  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
180  { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 },
181  {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 },
182  { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 },
183  { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 },
184  {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 },
185  { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 },
186  { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }
187  },
188  //level_add
189  { 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 },
190  2, //golomb_order
191  10, //inc_limit
192  3, //max_run
193  },
194  {
195  { //level / run
196  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
197  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
198  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
199  { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 },
200  {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 },
201  {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 },
202  {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 },
203  {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 },
204  {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 },
205  {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 }
206  },
207  //level_add
208  { 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 },
209  2, //golomb_order
210  INT_MAX, //inc_limit
211  2, //max_run
212  }
213 };
214 
215 static const struct dec_2dvlc inter_dec[7] = {
216  {
217  { //level / run
218  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
219  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
220  { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
221  { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 },
222  { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 },
223  { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 },
224  { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 },
225  { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 },
226  { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
227  { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB }
228  },
229  //level_add
230  { 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 },
231  3, //golomb_order
232  0, //inc_limit
233  26 //max_run
234  },
235  {
236  { //level / run
237  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 },
238  { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
239  { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 },
240  { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 },
241  { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 },
242  { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 },
243  { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 },
244  { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 },
245  { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 },
246  { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 }
247  },
248  //level_add
249  { 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 },
250  2, //golomb_order
251  1, //inc_limit
252  19 //max_run
253  },
254  {
255  { //level / run
256  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 },
257  { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 },
258  { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
259  { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 },
260  { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 },
261  { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 },
262  { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 },
263  { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 },
264  { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 },
265  { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 }
266  },
267  //level_add
268  { 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 },
269  2, //golomb_order
270  2, //inc_limit
271  14 //max_run
272  },
273  {
274  { //level / run
275  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
276  { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
277  { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 },
278  { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 },
279  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 },
280  { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
281  { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 },
282  { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 },
283  { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 },
284  { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 }
285  },
286  //level_add
287  { 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 },
288  2, //golomb_order
289  3, //inc_limit
290  10 //max_run
291  },
292  {
293  { //level / run
294  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
295  { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 },
296  { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 },
297  { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
298  { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
299  { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 },
300  { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 },
301  {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 },
302  { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 },
303  { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 }
304  },
305  //level_add
306  { 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 },
307  2, //golomb_order
308  6, //inc_limit
309  7 //max_run
310  },
311  {
312  { //level / run
313  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
314  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 },
315  { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 },
316  { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 },
317  { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 },
318  { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 },
319  { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 },
320  { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 },
321  { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 },
322  { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 }
323  },
324  //level_add
325  { 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 },
326  2, //golomb_order
327  9, //inc_limit
328  5 //max_run
329  },
330  {
331  { //level / run
332  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
333  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
334  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 },
335  { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
336  { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 },
337  { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 },
338  { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 },
339  { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 },
340  { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 },
341  { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 }
342  },
343  //level_add
344  { 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 },
345  2, //golomb_order
346  INT_MAX, //inc_limit
347  4 //max_run
348  }
349 };
350 
351 static const struct dec_2dvlc chroma_dec[5] = {
352  {
353  { //level / run
354  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
355  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
356  { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 },
357  { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 },
358  { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
359  { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 },
360  { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 },
361  { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 },
362  { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
363  { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB }
364  },
365  //level_add
366  { 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 },
367  2, //golomb_order
368  0, //inc_limit
369  25 //max_run
370  },
371  {
372  { //level / run
373  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 },
374  { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
375  { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 },
376  { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 },
377  { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 },
378  { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 },
379  { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 },
380  { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 },
381  { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 },
382  { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 }
383  },
384  //level_add
385  { 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 },
386  0, //golomb_order
387  1, //inc_limit
388  20 //max_run
389  },
390  {
391  { //level / run
392  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
393  { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 },
394  { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
395  { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
396  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 },
397  { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 },
398  { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 },
399  { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 },
400  { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 },
401  { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 },
402  },
403  //level_add
404  { 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 },
405  1, //golomb_order
406  2, //inc_limit
407  11 //max_run
408  },
409  {
410  { //level / run
411  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
412  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 },
413  { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 },
414  { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 },
415  { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 },
416  { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 },
417  {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 },
418  { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 },
419  {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 },
420  {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 },
421  },
422  //level_add
423  { 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 },
424  1, //golomb_order
425  4, //inc_limit
426  8 //max_run
427  },
428  {
429  { //level / run
430  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
431  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
432  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 },
433  { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
434  { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 },
435  { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 },
436  { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 },
437  { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 },
438  { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 },
439  { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 },
440  },
441  //level_add
442  { 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 },
443  0, //golomb_order
444  INT_MAX, //inc_limit
445  5, //max_run
446  }
447 };
448 
449 #undef EOB
450 
451 /*****************************************************************************
452  *
453  * motion vector prediction
454  *
455  ****************************************************************************/
456 
457 static inline void store_mvs(AVSContext *h)
458 {
459  h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0];
460  h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1];
461  h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2];
462  h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3];
463 }
464 
465 static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
466  cavs_vector *col_mv)
467 {
468  cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
469  int den = h->direct_den[col_mv->ref];
470  int m = FF_SIGNBIT(col_mv->x);
471 
472  pmv_fw->dist = h->dist[1];
473  pmv_bw->dist = h->dist[0];
474  pmv_fw->ref = 1;
475  pmv_bw->ref = 0;
476  /* scale the co-located motion vector according to its temporal span */
477  pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
478  pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
479  m = FF_SIGNBIT(col_mv->y);
480  pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
481  pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
482 }
483 
484 static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
485  enum cavs_block size)
486 {
487  cavs_vector *dst = src + MV_BWD_OFFS;
488 
489  /* backward mv is the scaled and negated forward mv */
490  dst->x = -((src->x * h->sym_factor + 256) >> 9);
491  dst->y = -((src->y * h->sym_factor + 256) >> 9);
492  dst->ref = 0;
493  dst->dist = h->dist[0];
494  set_mvs(dst, size);
495 }
496 
497 /*****************************************************************************
498  *
499  * residual data decoding
500  *
501  ****************************************************************************/
502 
503 /** kth-order exponential golomb code */
504 static inline int get_ue_code(GetBitContext *gb, int order)
505 {
506  unsigned ret = get_ue_golomb(gb);
507  if (ret >= ((1U<<31)>>order)) {
508  av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n");
509  return AVERROR_INVALIDDATA;
510  }
511  if (order) {
512  return (ret<<order) + get_bits(gb, order);
513  }
514  return ret;
515 }
516 
517 static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
518  int16_t *dst, int mul, int shift, int coeff_num)
519 {
520  int round = 1 << (shift - 1);
521  int pos = -1;
522  const uint8_t *scantab = h->scantable.permutated;
523 
524  /* inverse scan and dequantization */
525  while (--coeff_num >= 0) {
526  pos += run_buf[coeff_num];
527  if (pos > 63) {
528  av_log(h->avctx, AV_LOG_ERROR,
529  "position out of block bounds at pic %d MB(%d,%d)\n",
530  h->cur.poc, h->mbx, h->mby);
531  return AVERROR_INVALIDDATA;
532  }
533  dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift;
534  }
535  return 0;
536 }
537 
538 /**
539  * decode coefficients from one 8x8 block, dequantize, inverse transform
540  * and add them to sample block
541  * @param r pointer to 2D VLC table
542  * @param esc_golomb_order escape codes are k-golomb with this order k
543  * @param qp quantizer
544  * @param dst location of sample block
545  * @param stride line stride in frame buffer
546  */
547 static int decode_residual_block(AVSContext *h, GetBitContext *gb,
548  const struct dec_2dvlc *r, int esc_golomb_order,
549  int qp, uint8_t *dst, int stride)
550 {
551  int i, esc_code, level, mask, ret;
552  unsigned int level_code, run;
553  int16_t level_buf[65];
554  uint8_t run_buf[65];
555  int16_t *block = h->block;
556 
557  for (i = 0; i < 65; i++) {
558  level_code = get_ue_code(gb, r->golomb_order);
559  if (level_code >= ESCAPE_CODE) {
560  run = ((level_code - ESCAPE_CODE) >> 1) + 1;
561  if(run > 64) {
562  av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run);
563  return AVERROR_INVALIDDATA;
564  }
565  esc_code = get_ue_code(gb, esc_golomb_order);
566  if (esc_code < 0 || esc_code > 32767) {
567  av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n");
568  return AVERROR_INVALIDDATA;
569  }
570 
571  level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
572  while (level > r->inc_limit)
573  r++;
574  mask = -(level_code & 1);
575  level = (level ^ mask) - mask;
576  } else {
577  level = r->rltab[level_code][0];
578  if (!level) //end of block signal
579  break;
580  run = r->rltab[level_code][1];
581  r += r->rltab[level_code][2];
582  }
583  level_buf[i] = level;
584  run_buf[i] = run;
585  }
586  if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp],
587  dequant_shift[qp], i)) < 0)
588  return ret;
589  h->cdsp.cavs_idct8_add(dst, block, stride);
590  h->bdsp.clear_block(block);
591  return 0;
592 }
593 
594 
595 static inline void decode_residual_chroma(AVSContext *h)
596 {
597  if (h->cbp & (1 << 4))
598  decode_residual_block(h, &h->gb, chroma_dec, 0,
599  ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride);
600  if (h->cbp & (1 << 5))
601  decode_residual_block(h, &h->gb, chroma_dec, 0,
602  ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride);
603 }
604 
605 static inline int decode_residual_inter(AVSContext *h)
606 {
607  int block;
608 
609  /* get coded block pattern */
610  int cbp = get_ue_golomb(&h->gb);
611  if (cbp > 63U) {
612  av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
613  return AVERROR_INVALIDDATA;
614  }
615  h->cbp = cbp_tab[cbp][1];
616 
617  /* get quantizer */
618  if (h->cbp && !h->qp_fixed)
619  h->qp = (h->qp + get_se_golomb(&h->gb)) & 63;
620  for (block = 0; block < 4; block++)
621  if (h->cbp & (1 << block))
622  decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
623  h->cy + h->luma_scan[block], h->l_stride);
624  decode_residual_chroma(h);
625 
626  return 0;
627 }
628 
629 /*****************************************************************************
630  *
631  * macroblock level
632  *
633  ****************************************************************************/
634 
635 static inline void set_mv_intra(AVSContext *h)
636 {
637  h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
638  set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
639  h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
640  set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
641  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B)
642  h->col_type_base[h->mbidx] = I_8X8;
643 }
644 
645 static int decode_mb_i(AVSContext *h, int cbp_code)
646 {
647  GetBitContext *gb = &h->gb;
648  unsigned pred_mode_uv;
649  int block;
650  uint8_t top[18];
651  uint8_t *left = NULL;
652  uint8_t *d;
653 
654  ff_cavs_init_mb(h);
655 
656  /* get intra prediction modes from stream */
657  for (block = 0; block < 4; block++) {
658  int nA, nB, predpred;
659  int pos = scan3x3[block];
660 
661  nA = h->pred_mode_Y[pos - 1];
662  nB = h->pred_mode_Y[pos - 3];
663  predpred = FFMIN(nA, nB);
664  if (predpred == NOT_AVAIL) // if either is not available
665  predpred = INTRA_L_LP;
666  if (!get_bits1(gb)) {
667  int rem_mode = get_bits(gb, 2);
668  predpred = rem_mode + (rem_mode >= predpred);
669  }
670  h->pred_mode_Y[pos] = predpred;
671  }
672  pred_mode_uv = get_ue_golomb(gb);
673  if (pred_mode_uv > 6) {
674  av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
675  return AVERROR_INVALIDDATA;
676  }
677  ff_cavs_modify_mb_i(h, &pred_mode_uv);
678 
679  /* get coded block pattern */
680  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
681  cbp_code = get_ue_golomb(gb);
682  if (cbp_code > 63U) {
683  av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
684  return AVERROR_INVALIDDATA;
685  }
686  h->cbp = cbp_tab[cbp_code][0];
687  if (h->cbp && !h->qp_fixed)
688  h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
689 
690  /* luma intra prediction interleaved with residual decode/transform/add */
691  for (block = 0; block < 4; block++) {
692  d = h->cy + h->luma_scan[block];
693  ff_cavs_load_intra_pred_luma(h, top, &left, block);
694  h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
695  (d, top, left, h->l_stride);
696  if (h->cbp & (1<<block))
697  decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
698  }
699 
700  /* chroma intra prediction */
701  ff_cavs_load_intra_pred_chroma(h);
702  h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
703  h->left_border_u, h->c_stride);
704  h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
705  h->left_border_v, h->c_stride);
706 
707  decode_residual_chroma(h);
708  ff_cavs_filter(h, I_8X8);
709  set_mv_intra(h);
710  return 0;
711 }
712 
713 static inline void set_intra_mode_default(AVSContext *h)
714 {
715  if (h->stream_revision > 0) {
716  h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
717  h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
718  } else {
719  h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
720  h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
721  }
722 }
723 
724 static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
725 {
726  GetBitContext *gb = &h->gb;
727  int ref[4];
728 
729  ff_cavs_init_mb(h);
730  switch (mb_type) {
731  case P_SKIP:
732  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
733  break;
734  case P_16X16:
735  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
736  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
737  break;
738  case P_16X8:
739  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
740  ref[2] = h->ref_flag ? 0 : get_bits1(gb);
741  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
742  ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
743  break;
744  case P_8X16:
745  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
746  ref[1] = h->ref_flag ? 0 : get_bits1(gb);
747  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
748  ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
749  break;
750  case P_8X8:
751  ref[0] = h->ref_flag ? 0 : get_bits1(gb);
752  ref[1] = h->ref_flag ? 0 : get_bits1(gb);
753  ref[2] = h->ref_flag ? 0 : get_bits1(gb);
754  ref[3] = h->ref_flag ? 0 : get_bits1(gb);
755  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
756  ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
757  ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
758  ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
759  }
760  ff_cavs_inter(h, mb_type);
761  set_intra_mode_default(h);
762  store_mvs(h);
763  if (mb_type != P_SKIP)
764  decode_residual_inter(h);
765  ff_cavs_filter(h, mb_type);
766  h->col_type_base[h->mbidx] = mb_type;
767 }
768 
769 static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
770 {
771  int block;
772  enum cavs_sub_mb sub_type[4];
773  int flags;
774 
775  ff_cavs_init_mb(h);
776 
777  /* reset all MVs */
778  h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
779  set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
780  h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
781  set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
782  switch (mb_type) {
783  case B_SKIP:
784  case B_DIRECT:
785  if (!h->col_type_base[h->mbidx]) {
786  /* intra MB at co-location, do in-plane prediction */
787  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
788  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
789  } else
790  /* direct prediction from co-located P MB, block-wise */
791  for (block = 0; block < 4; block++)
792  mv_pred_direct(h, &h->mv[mv_scan[block]],
793  &h->col_mv[h->mbidx * 4 + block]);
794  break;
795  case B_FWD_16X16:
796  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
797  break;
798  case B_SYM_16X16:
799  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
800  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
801  break;
802  case B_BWD_16X16:
803  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
804  break;
805  case B_8X8:
806 #define TMP_UNUSED_INX 7
807  flags = 0;
808  for (block = 0; block < 4; block++)
809  sub_type[block] = get_bits(&h->gb, 2);
810  for (block = 0; block < 4; block++) {
811  switch (sub_type[block]) {
812  case B_SUB_DIRECT:
813  if (!h->col_type_base[h->mbidx]) {
814  /* intra MB at co-location, do in-plane prediction */
815  if(flags==0) {
816  // if col-MB is a Intra MB, current Block size is 16x16.
817  // AVS standard section 9.9.1
818  if(block>0){
819  h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ];
820  h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
821  }
822  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2,
823  MV_PRED_BSKIP, BLK_8X8, 1);
824  ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS,
825  MV_FWD_C2+MV_BWD_OFFS,
826  MV_PRED_BSKIP, BLK_8X8, 0);
827  if(block>0) {
828  flags = mv_scan[block];
829  h->mv[flags ] = h->mv[MV_FWD_X0 ];
830  h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
831  h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ];
832  h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS];
833  } else
834  flags = MV_FWD_X0;
835  } else {
836  h->mv[mv_scan[block] ] = h->mv[flags ];
837  h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS];
838  }
839  } else
840  mv_pred_direct(h, &h->mv[mv_scan[block]],
841  &h->col_mv[h->mbidx * 4 + block]);
842  break;
843  case B_SUB_FWD:
844  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
845  MV_PRED_MEDIAN, BLK_8X8, 1);
846  break;
847  case B_SUB_SYM:
848  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
849  MV_PRED_MEDIAN, BLK_8X8, 1);
850  mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
851  break;
852  }
853  }
854 #undef TMP_UNUSED_INX
855  for (block = 0; block < 4; block++) {
856  if (sub_type[block] == B_SUB_BWD)
857  ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
858  mv_scan[block] + MV_BWD_OFFS - 3,
859  MV_PRED_MEDIAN, BLK_8X8, 0);
860  }
861  break;
862  default:
863  if (mb_type <= B_SYM_16X16) {
864  av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
865  return AVERROR_INVALIDDATA;
866  }
867  av_assert2(mb_type < B_8X8);
868  flags = ff_cavs_partition_flags[mb_type];
869  if (mb_type & 1) { /* 16x8 macroblock types */
870  if (flags & FWD0)
871  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
872  if (flags & SYM0)
873  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
874  if (flags & FWD1)
875  ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
876  if (flags & SYM1)
877  mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
878  if (flags & BWD0)
879  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
880  if (flags & BWD1)
881  ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
882  } else { /* 8x16 macroblock types */
883  if (flags & FWD0)
884  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
885  if (flags & SYM0)
886  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
887  if (flags & FWD1)
888  ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
889  if (flags & SYM1)
890  mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
891  if (flags & BWD0)
892  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
893  if (flags & BWD1)
894  ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
895  }
896  }
897  ff_cavs_inter(h, mb_type);
898  set_intra_mode_default(h);
899  if (mb_type != B_SKIP)
900  decode_residual_inter(h);
901  ff_cavs_filter(h, mb_type);
902 
903  return 0;
904 }
905 
906 /*****************************************************************************
907  *
908  * slice level
909  *
910  ****************************************************************************/
911 
912 static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
913 {
914  if (h->stc > 0xAF)
915  av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
916 
917  if (h->stc >= h->mb_height) {
918  av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc);
919  return AVERROR_INVALIDDATA;
920  }
921 
922  h->mby = h->stc;
923  h->mbidx = h->mby * h->mb_width;
924 
925  /* mark top macroblocks as unavailable */
926  h->flags &= ~(B_AVAIL | C_AVAIL);
927  if (!h->pic_qp_fixed) {
928  h->qp_fixed = get_bits1(gb);
929  h->qp = get_bits(gb, 6);
930  }
931  /* inter frame or second slice can have weighting params */
932  if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
933  (!h->pic_structure && h->mby >= h->mb_width / 2))
934  if (get_bits1(gb)) { //slice_weighting_flag
935  av_log(h->avctx, AV_LOG_ERROR,
936  "weighted prediction not yet supported\n");
937  }
938  return 0;
939 }
940 
941 static inline int check_for_slice(AVSContext *h)
942 {
943  GetBitContext *gb = &h->gb;
944  int align;
945 
946  if (h->mbx)
947  return 0;
948  align = (-get_bits_count(gb)) & 7;
949  /* check for stuffing byte */
950  if (!align && (show_bits(gb, 8) == 0x80))
951  align = 8;
952  if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
953  skip_bits_long(gb, 24 + align);
954  h->stc = get_bits(gb, 8);
955  if (h->stc >= h->mb_height)
956  return 0;
957  decode_slice_header(h, gb);
958  return 1;
959  }
960  return 0;
961 }
962 
963 /*****************************************************************************
964  *
965  * frame level
966  *
967  ****************************************************************************/
968 
969 static int decode_pic(AVSContext *h)
970 {
971  int ret;
972  int skip_count = -1;
973  enum cavs_mb mb_type;
974 
975  if (!h->top_qp) {
976  av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n");
977  return AVERROR_INVALIDDATA;
978  }
979 
980  av_frame_unref(h->cur.f);
981 
982  skip_bits(&h->gb, 16);//bbv_dwlay
983  if (h->stc == PIC_PB_START_CODE) {
984  h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
985  if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
986  av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
987  return AVERROR_INVALIDDATA;
988  }
989  /* make sure we have the reference frames we need */
990  if (!h->DPB[0].f->data[0] ||
991  (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
992  return AVERROR_INVALIDDATA;
993  } else {
994  h->cur.f->pict_type = AV_PICTURE_TYPE_I;
995  if (get_bits1(&h->gb))
996  skip_bits(&h->gb, 24);//time_code
997  /* old sample clips were all progressive and no low_delay,
998  bump stream revision if detected otherwise */
999  if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
1000  h->stream_revision = 1;
1001  /* similarly test top_field_first and repeat_first_field */
1002  else if (show_bits(&h->gb, 11) & 3)
1003  h->stream_revision = 1;
1004  if (h->stream_revision > 0)
1005  skip_bits(&h->gb, 1); //marker_bit
1006  }
1007 
1008  ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
1009  0 : AV_GET_BUFFER_FLAG_REF);
1010  if (ret < 0)
1011  return ret;
1012 
1013  if (!h->edge_emu_buffer) {
1014  int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
1015  h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
1016  if (!h->edge_emu_buffer)
1017  return AVERROR(ENOMEM);
1018  }
1019 
1020  if ((ret = ff_cavs_init_pic(h)) < 0)
1021  return ret;
1022  h->cur.poc = get_bits(&h->gb, 8) * 2;
1023 
1024  /* get temporal distances and MV scaling factors */
1025  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1026  h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511;
1027  } else {
1028  h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511;
1029  }
1030  h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511;
1031  h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
1032  h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
1033  if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
1034  h->sym_factor = h->dist[0] * h->scale_den[1];
1035  } else {
1036  h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
1037  h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
1038  }
1039 
1040  if (h->low_delay)
1041  get_ue_golomb(&h->gb); //bbv_check_times
1042  h->progressive = get_bits1(&h->gb);
1043  h->pic_structure = 1;
1044  if (!h->progressive)
1045  h->pic_structure = get_bits1(&h->gb);
1046  if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
1047  skip_bits1(&h->gb); //advanced_pred_mode_disable
1048  skip_bits1(&h->gb); //top_field_first
1049  skip_bits1(&h->gb); //repeat_first_field
1050  h->pic_qp_fixed =
1051  h->qp_fixed = get_bits1(&h->gb);
1052  h->qp = get_bits(&h->gb, 6);
1053  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1054  if (!h->progressive && !h->pic_structure)
1055  skip_bits1(&h->gb);//what is this?
1056  skip_bits(&h->gb, 4); //reserved bits
1057  } else {
1058  if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
1059  h->ref_flag = get_bits1(&h->gb);
1060  skip_bits(&h->gb, 4); //reserved bits
1061  h->skip_mode_flag = get_bits1(&h->gb);
1062  }
1063  h->loop_filter_disable = get_bits1(&h->gb);
1064  if (!h->loop_filter_disable && get_bits1(&h->gb)) {
1065  h->alpha_offset = get_se_golomb(&h->gb);
1066  h->beta_offset = get_se_golomb(&h->gb);
1067  } else {
1068  h->alpha_offset = h->beta_offset = 0;
1069  }
1070  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1071  do {
1072  check_for_slice(h);
1073  decode_mb_i(h, 0);
1074  } while (ff_cavs_next_mb(h));
1075  } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
1076  do {
1077  if (check_for_slice(h))
1078  skip_count = -1;
1079  if (h->skip_mode_flag && (skip_count < 0))
1080  skip_count = get_ue_golomb(&h->gb);
1081  if (h->skip_mode_flag && skip_count--) {
1082  decode_mb_p(h, P_SKIP);
1083  } else {
1084  mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
1085  if (mb_type > P_8X8)
1086  decode_mb_i(h, mb_type - P_8X8 - 1);
1087  else
1088  decode_mb_p(h, mb_type);
1089  }
1090  } while (ff_cavs_next_mb(h));
1091  } else { /* AV_PICTURE_TYPE_B */
1092  do {
1093  if (check_for_slice(h))
1094  skip_count = -1;
1095  if (h->skip_mode_flag && (skip_count < 0))
1096  skip_count = get_ue_golomb(&h->gb);
1097  if (h->skip_mode_flag && skip_count--) {
1098  decode_mb_b(h, B_SKIP);
1099  } else {
1100  mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
1101  if (mb_type > B_8X8)
1102  decode_mb_i(h, mb_type - B_8X8 - 1);
1103  else
1104  decode_mb_b(h, mb_type);
1105  }
1106  } while (ff_cavs_next_mb(h));
1107  }
1108  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1109  av_frame_unref(h->DPB[1].f);
1110  FFSWAP(AVSFrame, h->cur, h->DPB[1]);
1111  FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
1112  }
1113  return 0;
1114 }
1115 
1116 /*****************************************************************************
1117  *
1118  * headers and interface
1119  *
1120  ****************************************************************************/
1121 
1122 static int decode_seq_header(AVSContext *h)
1123 {
1124  int frame_rate_code;
1125  int width, height;
1126  int ret;
1127 
1128  h->profile = get_bits(&h->gb, 8);
1129  h->level = get_bits(&h->gb, 8);
1130  skip_bits1(&h->gb); //progressive sequence
1131 
1132  width = get_bits(&h->gb, 14);
1133  height = get_bits(&h->gb, 14);
1134  if ((h->width || h->height) && (h->width != width || h->height != height)) {
1135  avpriv_report_missing_feature(h->avctx,
1136  "Width/height changing in CAVS");
1137  return AVERROR_PATCHWELCOME;
1138  }
1139  if (width <= 0 || height <= 0) {
1140  av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
1141  return AVERROR_INVALIDDATA;
1142  }
1143  skip_bits(&h->gb, 2); //chroma format
1144  skip_bits(&h->gb, 3); //sample_precision
1145  h->aspect_ratio = get_bits(&h->gb, 4);
1146  frame_rate_code = get_bits(&h->gb, 4);
1147  if (frame_rate_code == 0 || frame_rate_code > 13) {
1148  av_log(h->avctx, AV_LOG_WARNING,
1149  "frame_rate_code %d is invalid\n", frame_rate_code);
1150  frame_rate_code = 1;
1151  }
1152 
1153  skip_bits(&h->gb, 18); //bit_rate_lower
1154  skip_bits1(&h->gb); //marker_bit
1155  skip_bits(&h->gb, 12); //bit_rate_upper
1156  h->low_delay = get_bits1(&h->gb);
1157 
1158  ret = ff_set_dimensions(h->avctx, width, height);
1159  if (ret < 0)
1160  return ret;
1161 
1162  h->width = width;
1163  h->height = height;
1164  h->mb_width = (h->width + 15) >> 4;
1165  h->mb_height = (h->height + 15) >> 4;
1166  h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
1167  if (!h->top_qp)
1168  return ff_cavs_init_top_lines(h);
1169  return 0;
1170 }
1171 
1172 static void cavs_flush(AVCodecContext * avctx)
1173 {
1174  AVSContext *h = avctx->priv_data;
1175  h->got_keyframe = 0;
1176 }
1177 
1178 static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1179  AVPacket *avpkt)
1180 {
1181  AVSContext *h = avctx->priv_data;
1182  const uint8_t *buf = avpkt->data;
1183  int buf_size = avpkt->size;
1184  uint32_t stc = -1;
1185  int input_size, ret;
1186  const uint8_t *buf_end;
1187  const uint8_t *buf_ptr;
1188 
1189  if (buf_size == 0) {
1190  if (!h->low_delay && h->DPB[0].f->data[0]) {
1191  *got_frame = 1;
1192  av_frame_move_ref(data, h->DPB[0].f);
1193  }
1194  return 0;
1195  }
1196 
1197  h->stc = 0;
1198 
1199  buf_ptr = buf;
1200  buf_end = buf + buf_size;
1201  for(;;) {
1202  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
1203  if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) {
1204  if (!h->stc)
1205  av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n");
1206  return FFMAX(0, buf_ptr - buf);
1207  }
1208  input_size = (buf_end - buf_ptr) * 8;
1209  switch (stc) {
1210  case CAVS_START_CODE:
1211  init_get_bits(&h->gb, buf_ptr, input_size);
1212  decode_seq_header(h);
1213  break;
1214  case PIC_I_START_CODE:
1215  if (!h->got_keyframe) {
1216  av_frame_unref(h->DPB[0].f);
1217  av_frame_unref(h->DPB[1].f);
1218  h->got_keyframe = 1;
1219  }
1220  case PIC_PB_START_CODE:
1221  *got_frame = 0;
1222  if (!h->got_keyframe)
1223  break;
1224  init_get_bits(&h->gb, buf_ptr, input_size);
1225  h->stc = stc;
1226  if (decode_pic(h))
1227  break;
1228  *got_frame = 1;
1229  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1230  if (h->DPB[!h->low_delay].f->data[0]) {
1231  if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0)
1232  return ret;
1233  } else {
1234  *got_frame = 0;
1235  }
1236  } else {
1237  av_frame_move_ref(data, h->cur.f);
1238  }
1239  break;
1240  case EXT_START_CODE:
1241  //mpeg_decode_extension(avctx, buf_ptr, input_size);
1242  break;
1243  case USER_START_CODE:
1244  //mpeg_decode_user_data(avctx, buf_ptr, input_size);
1245  break;
1246  default:
1247  if (stc <= SLICE_MAX_START_CODE) {
1248  init_get_bits(&h->gb, buf_ptr, input_size);
1249  decode_slice_header(h, &h->gb);
1250  }
1251  break;
1252  }
1253  }
1254 }
1255 
1256 AVCodec ff_cavs_decoder = {
1257  .name = "cavs",
1258  .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
1259  .type = AVMEDIA_TYPE_VIDEO,
1260  .id = AV_CODEC_ID_CAVS,
1261  .priv_data_size = sizeof(AVSContext),
1262  .init = ff_cavs_init,
1263  .close = ff_cavs_end,
1264  .decode = cavs_decode_frame,
1265  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
1266  .flush = cavs_flush,
1267 };
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:383
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:3023
chroma_dec
static const struct dec_2dvlc chroma_dec[5]
Definition: cavsdec.c:351
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
B_8X8
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
dec_2dvlc::inc_limit
int inc_limit
Definition: cavs.h:154
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static int shift(int a, int b)
Definition: sonic.c:82
AVSContext::edge_emu_buffer
uint8_t * edge_emu_buffer
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
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
AVSContext::cbp
int cbp
Definition: cavs.h:220
get_se_golomb
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:183
BlockDSPContext::clear_block
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
get_bits
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
ff_set_dimensions
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:229
skip_bits_long
static void skip_bits_long(GetBitContext *s, int n)
Definition: get_bits.h:217
cavs_vector::x
int16_t x
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:55
ff_cavs_end
av_cold int ff_cavs_end(AVCodecContext *avctx)
Definition: cavs.c:835
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int mbidx
macroblock coordinates
Definition: cavs.h:186
BWD1
#define BWD1
Definition: cavs.h:52
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static const uint8_t scan3x3[4]
Definition: cavsdec.c:53
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const uint8_t ff_cavs_chroma_qp[64]
Definition: cavsdata.c:57
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cavs_vector * col_mv
Definition: cavs.h:207
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int poc
Definition: cavs.h:160
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Definition: cavs.h:69
SYM1
#define SYM1
Definition: cavs.h:54
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int size
Definition: avcodec.h:1163
ff_cavs_init_mb
void ff_cavs_init_mb(AVSContext *h)
initialise predictors for motion vectors and intra prediction
Definition: cavs.c:632
av_frame_move_ref
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:479
mpegvideo.h
mpegvideo header.
P_8X16
Definition: cavs.h:66
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int qp
Definition: cavs.h:217
ScanTable::permutated
uint8_t permutated[64]
Definition: idctdsp.h:31
run
uint8_t run
Definition: svq3.c:149
AVSContext::loop_filter_disable
int loop_filter_disable
Definition: cavs.h:183
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AVCodec.
Definition: avcodec.h:3181
FFALIGN
#define FFALIGN(x, a)
Definition: common.h:71
decode_seq_header
static int decode_seq_header(AVSContext *h)
Definition: cavsdec.c:1122
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cavs_mb
Definition: cavs.h:61
MV_BWD_OFFS
#define MV_BWD_OFFS
Definition: cavs.h:58
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:517
AVSContext::scantable
ScanTable scantable
Definition: cavs.h:221
FWD1
#define FWD1
Definition: cavs.h:50
set_mv_intra
static void set_mv_intra(AVSContext *h)
Definition: cavsdec.c:635
uint8_t
uint8_t
Definition: audio_convert.c:194
AVSContext::ref_flag
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
AVSContext::top_qp
uint8_t * top_qp
Definition: cavs.h:191
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int8_t rltab[59][3]
Definition: cavs.h:151
av_frame_ref
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:363
mv_scan
static const uint8_t mv_scan[4]
Definition: cavsdec.c:37
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
CODEC_CAP_DR1
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:789
PIC_I_START_CODE
#define PIC_I_START_CODE
Definition: cavs.h:36
AVPacket::data
uint8_t * data
Definition: avcodec.h:1162
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:212
dec_2dvlc::golomb_order
int8_t golomb_order
Definition: cavs.h:153
get_bits.h
bitstream reader API header.
cavs_flush
static void cavs_flush(AVCodecContext *avctx)
Definition: cavsdec.c:1172
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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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ptrdiff_t size
Definition: opengl_enc.c:101
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int dist[2]
temporal distances from current frame to ref frames
Definition: cavs.h:173
AVSContext::mby
int mby
Definition: cavs.h:186
AVSContext::gb
GetBitContext gb
Definition: cavs.h:170
AVSContext::cy
uint8_t * cy
Definition: cavs.h:189
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
avpriv_find_start_code
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
AVSContext::cu
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
get_ue_golomb
static int get_ue_golomb(GetBitContext *gb)
read unsigned exp golomb code.
Definition: golomb.h:53
decode_pic
static int decode_pic(AVSContext *h)
Definition: cavsdec.c:969
AVSContext::progressive
int progressive
Definition: cavs.h:180
AVSContext::cur
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
CODEC_CAP_DELAY
#define 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:824
FF_SIGNBIT
#define FF_SIGNBIT(x)
Definition: internal.h:66
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
AVSContext::cdsp
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:175
r
const char * r
Definition: vf_curves.c:107
decode_slice_header
static int decode_slice_header(AVSContext *h, GetBitContext *gb)
Definition: cavsdec.c:912
decode_mb_p
static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
Definition: cavsdec.c:724
cbp_tab
static const uint8_t cbp_tab[64][2]
Definition: cavsdec.c:42
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:3188
round
static av_always_inline av_const double round(double x)
Definition: libm.h:162
FFMAX
#define FFMAX(a, b)
Definition: common.h:64
avcodec.h
Libavcodec external API header.
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:77
dequant_mul
static const uint16_t dequant_mul[64]
Definition: cavsdec.c:66
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:941
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:267
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
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:66
ff_cavs_decoder
AVCodec ff_cavs_decoder
Definition: cavsdec.c:1256
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
ret
ret
Definition: avfilter.c:974
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:287
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)
Definition: common.h:61
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
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
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec.c:514
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:595
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:465
src
AVS_Value src
Definition: avisynth_c.h:482
cavs_vector
Definition: cavs.h:143
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:769
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
AVCodecContext
main external API structure.
Definition: avcodec.h:1241
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:1035
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:304
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:329
cavs_decode_frame
static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: cavsdec.c:1178
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:297
CAVS_START_CODE
#define CAVS_START_CODE
Definition: cavs.h:35
intra_dec
static const struct dec_2dvlc intra_dec[7]
Definition: cavsdec.c:79
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:410
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:457
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:462
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:195
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
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:522
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:484
AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:269
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:504
AVSContext::mb_height
int mb_height
Definition: cavs.h:177
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1283
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:215
decode_mb_i
static int decode_mb_i(AVSContext *h, int cbp_code)
Definition: cavsdec.c:645
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:547
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:194
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:605
FFSWAP
#define FFSWAP(type, a, b)
Definition: common.h:69
set_intra_mode_default
static void set_intra_mode_default(AVSContext *h)
Definition: cavsdec.c:713
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:1139
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:969
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:250
AVSContext::mb_width
int mb_width
Definition: cavs.h:177
AVSFrame::f
AVFrame * f
Definition: cavs.h:159
AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:268
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:110
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