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 cavs_chroma_qp[64] = {
56  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
57  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
58  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 42, 43, 43, 44, 44,
59  45, 45, 46, 46, 47, 47, 48, 48, 48, 49, 49, 49, 50, 50, 50, 51
60 };
61 
62 static const uint8_t dequant_shift[64] = {
63  14, 14, 14, 14, 14, 14, 14, 14,
64  13, 13, 13, 13, 13, 13, 13, 13,
65  13, 12, 12, 12, 12, 12, 12, 12,
66  11, 11, 11, 11, 11, 11, 11, 11,
67  11, 10, 10, 10, 10, 10, 10, 10,
68  10, 9, 9, 9, 9, 9, 9, 9,
69  9, 8, 8, 8, 8, 8, 8, 8,
70  7, 7, 7, 7, 7, 7, 7, 7
71 };
72 
73 static const uint16_t dequant_mul[64] = {
74  32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
75  32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
76  65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
77  32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
78  65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
79  65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
80  65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
81  32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
82 };
83 
84 #define EOB 0, 0, 0
85 
86 static const struct dec_2dvlc intra_dec[7] = {
87  {
88  { //level / run / table_inc
89  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
90  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
91  { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
92  { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 },
93  { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
94  { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 },
95  { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 },
96  { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 },
97  { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 },
98  { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB }
99  },
100  //level_add
101  { 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 },
102  2, //golomb_order
103  0, //inc_limit
104  23, //max_run
105  },
106  {
107  { //level / run
108  { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 },
109  { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
110  { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 },
111  { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 },
112  { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 },
113  { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 },
114  { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 },
115  { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 },
116  { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 },
117  { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 }
118  },
119  //level_add
120  { 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 },
121  2, //golomb_order
122  1, //inc_limit
123  15, //max_run
124  },
125  {
126  { //level / run
127  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 },
128  { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
129  { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
130  { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
131  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 },
132  { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
133  { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 },
134  { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 },
135  { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 },
136  { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 }
137  },
138  //level_add
139  { 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 },
140  2, //golomb_order
141  2, //inc_limit
142  10, //max_run
143  },
144  {
145  { //level / run
146  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
147  { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 },
148  { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 },
149  { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
150  { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
151  { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 },
152  { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 },
153  { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 },
154  { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 },
155  { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 }
156  },
157  //level_add
158  { 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 },
159  2, //golomb_order
160  4, //inc_limit
161  7, //max_run
162  },
163  {
164  { //level / run
165  { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
166  { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
167  { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 },
168  { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 },
169  {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 },
170  {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 },
171  {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 },
172  { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 },
173  {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 },
174  { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 }
175  },
176  //level_add
177  { 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 },
178  2, //golomb_order
179  7, //inc_limit
180  5, //max_run
181  },
182  {
183  { //level / run
184  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
185  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
186  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
187  { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 },
188  {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 },
189  { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 },
190  { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 },
191  {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 },
192  { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 },
193  { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }
194  },
195  //level_add
196  { 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 },
197  2, //golomb_order
198  10, //inc_limit
199  3, //max_run
200  },
201  {
202  { //level / run
203  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
204  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
205  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
206  { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 },
207  {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 },
208  {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 },
209  {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 },
210  {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 },
211  {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 },
212  {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 }
213  },
214  //level_add
215  { 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 },
216  2, //golomb_order
217  INT_MAX, //inc_limit
218  2, //max_run
219  }
220 };
221 
222 static const struct dec_2dvlc inter_dec[7] = {
223  {
224  { //level / run
225  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
226  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
227  { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
228  { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 },
229  { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 },
230  { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 },
231  { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 },
232  { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 },
233  { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
234  { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB }
235  },
236  //level_add
237  { 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 },
238  3, //golomb_order
239  0, //inc_limit
240  26 //max_run
241  },
242  {
243  { //level / run
244  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 },
245  { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
246  { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 },
247  { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 },
248  { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 },
249  { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 },
250  { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 },
251  { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 },
252  { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 },
253  { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 }
254  },
255  //level_add
256  { 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 },
257  2, //golomb_order
258  1, //inc_limit
259  19 //max_run
260  },
261  {
262  { //level / run
263  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 },
264  { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 },
265  { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
266  { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 },
267  { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 },
268  { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 },
269  { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 },
270  { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 },
271  { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 },
272  { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 }
273  },
274  //level_add
275  { 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 },
276  2, //golomb_order
277  2, //inc_limit
278  14 //max_run
279  },
280  {
281  { //level / run
282  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
283  { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
284  { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 },
285  { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 },
286  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 },
287  { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
288  { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 },
289  { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 },
290  { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 },
291  { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 }
292  },
293  //level_add
294  { 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 },
295  2, //golomb_order
296  3, //inc_limit
297  10 //max_run
298  },
299  {
300  { //level / run
301  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
302  { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 },
303  { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 },
304  { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
305  { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
306  { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 },
307  { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 },
308  {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 },
309  { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 },
310  { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 }
311  },
312  //level_add
313  { 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 },
314  2, //golomb_order
315  6, //inc_limit
316  7 //max_run
317  },
318  {
319  { //level / run
320  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
321  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 },
322  { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 },
323  { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 },
324  { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 },
325  { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 },
326  { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 },
327  { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 },
328  { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 },
329  { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 }
330  },
331  //level_add
332  { 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 },
333  2, //golomb_order
334  9, //inc_limit
335  5 //max_run
336  },
337  {
338  { //level / run
339  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
340  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
341  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 },
342  { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
343  { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 },
344  { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 },
345  { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 },
346  { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 },
347  { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 },
348  { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 }
349  },
350  //level_add
351  { 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 },
352  2, //golomb_order
353  INT_MAX, //inc_limit
354  4 //max_run
355  }
356 };
357 
358 static const struct dec_2dvlc chroma_dec[5] = {
359  {
360  { //level / run
361  { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
362  { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
363  { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 },
364  { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 },
365  { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
366  { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 },
367  { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 },
368  { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 },
369  { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
370  { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB }
371  },
372  //level_add
373  { 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 },
374  2, //golomb_order
375  0, //inc_limit
376  25 //max_run
377  },
378  {
379  { //level / run
380  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 },
381  { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
382  { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 },
383  { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 },
384  { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 },
385  { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 },
386  { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 },
387  { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 },
388  { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 },
389  { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 }
390  },
391  //level_add
392  { 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 },
393  0, //golomb_order
394  1, //inc_limit
395  20 //max_run
396  },
397  {
398  { //level / run
399  { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
400  { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 },
401  { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
402  { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
403  { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 },
404  { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 },
405  { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 },
406  { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 },
407  { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 },
408  { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 },
409  },
410  //level_add
411  { 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 },
412  1, //golomb_order
413  2, //inc_limit
414  11 //max_run
415  },
416  {
417  { //level / run
418  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
419  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 },
420  { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 },
421  { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 },
422  { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 },
423  { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 },
424  {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 },
425  { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 },
426  {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 },
427  {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 },
428  },
429  //level_add
430  { 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 },
431  1, //golomb_order
432  4, //inc_limit
433  8 //max_run
434  },
435  {
436  { //level / run
437  { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
438  { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
439  { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 },
440  { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
441  { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 },
442  { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 },
443  { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 },
444  { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 },
445  { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 },
446  { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 },
447  },
448  //level_add
449  { 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 },
450  0, //golomb_order
451  INT_MAX, //inc_limit
452  5, //max_run
453  }
454 };
455 
456 #undef EOB
457 
458 /*****************************************************************************
459  *
460  * motion vector prediction
461  *
462  ****************************************************************************/
463 
464 static inline void store_mvs(AVSContext *h)
465 {
466  h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0];
467  h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1];
468  h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2];
469  h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3];
470 }
471 
472 static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
473  cavs_vector *col_mv)
474 {
475  cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
476  int den = h->direct_den[col_mv->ref];
477  int m = col_mv->x >> 31;
478 
479  pmv_fw->dist = h->dist[1];
480  pmv_bw->dist = h->dist[0];
481  pmv_fw->ref = 1;
482  pmv_bw->ref = 0;
483  /* scale the co-located motion vector according to its temporal span */
484  pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
485  pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
486  m = col_mv->y >> 31;
487  pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
488  pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
489 }
490 
491 static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
492  enum cavs_block size)
493 {
494  cavs_vector *dst = src + MV_BWD_OFFS;
495 
496  /* backward mv is the scaled and negated forward mv */
497  dst->x = -((src->x * h->sym_factor + 256) >> 9);
498  dst->y = -((src->y * h->sym_factor + 256) >> 9);
499  dst->ref = 0;
500  dst->dist = h->dist[0];
501  set_mvs(dst, size);
502 }
503 
504 /*****************************************************************************
505  *
506  * residual data decoding
507  *
508  ****************************************************************************/
509 
510 /** kth-order exponential golomb code */
511 static inline int get_ue_code(GetBitContext *gb, int order)
512 {
513  unsigned ret = get_ue_golomb(gb);
514  if (ret >= ((1U<<31)>>order)) {
515  av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n");
516  return AVERROR_INVALIDDATA;
517  }
518  if (order) {
519  return (ret<<order) + get_bits(gb, order);
520  }
521  return ret;
522 }
523 
524 static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
525  int16_t *dst, int mul, int shift, int coeff_num)
526 {
527  int round = 1 << (shift - 1);
528  int pos = -1;
529  const uint8_t *scantab = h->scantable.permutated;
530 
531  /* inverse scan and dequantization */
532  while (--coeff_num >= 0) {
533  pos += run_buf[coeff_num];
534  if (pos > 63) {
535  av_log(h->avctx, AV_LOG_ERROR,
536  "position out of block bounds at pic %d MB(%d,%d)\n",
537  h->cur.poc, h->mbx, h->mby);
538  return -1;
539  }
540  dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift;
541  }
542  return 0;
543 }
544 
545 /**
546  * decode coefficients from one 8x8 block, dequantize, inverse transform
547  * and add them to sample block
548  * @param r pointer to 2D VLC table
549  * @param esc_golomb_order escape codes are k-golomb with this order k
550  * @param qp quantizer
551  * @param dst location of sample block
552  * @param stride line stride in frame buffer
553  */
554 static int decode_residual_block(AVSContext *h, GetBitContext *gb,
555  const struct dec_2dvlc *r, int esc_golomb_order,
556  int qp, uint8_t *dst, int stride)
557 {
558  int i, esc_code, level, mask;
559  unsigned int level_code, run;
560  int16_t level_buf[65];
561  uint8_t run_buf[65];
562  int16_t *block = h->block;
563 
564  for (i = 0; i < 65; i++) {
565  level_code = get_ue_code(gb, r->golomb_order);
566  if (level_code >= ESCAPE_CODE) {
567  run = ((level_code - ESCAPE_CODE) >> 1) + 1;
568  if(run > 64)
569  return -1;
570  esc_code = get_ue_code(gb, esc_golomb_order);
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 (dequant(h, level_buf, run_buf, block, dequant_mul[qp],
587  dequant_shift[qp], i))
588  return -1;
589  h->cdsp.cavs_idct8_add(dst, block, stride);
590  h->dsp.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  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  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\n");
613  return -1;
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 -1;
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 -1;
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  for (block = 0; block < 4; block++)
807  sub_type[block] = get_bits(&h->gb, 2);
808  for (block = 0; block < 4; block++) {
809  switch (sub_type[block]) {
810  case B_SUB_DIRECT:
811  if (!h->col_type_base[h->mbidx]) {
812  /* intra MB at co-location, do in-plane prediction */
813  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
814  MV_PRED_BSKIP, BLK_8X8, 1);
815  ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
816  mv_scan[block] - 3 + MV_BWD_OFFS,
817  MV_PRED_BSKIP, BLK_8X8, 0);
818  } else
819  mv_pred_direct(h, &h->mv[mv_scan[block]],
820  &h->col_mv[h->mbidx * 4 + block]);
821  break;
822  case B_SUB_FWD:
823  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
824  MV_PRED_MEDIAN, BLK_8X8, 1);
825  break;
826  case B_SUB_SYM:
827  ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
828  MV_PRED_MEDIAN, BLK_8X8, 1);
829  mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
830  break;
831  }
832  }
833  for (block = 0; block < 4; block++) {
834  if (sub_type[block] == B_SUB_BWD)
835  ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
836  mv_scan[block] + MV_BWD_OFFS - 3,
837  MV_PRED_MEDIAN, BLK_8X8, 0);
838  }
839  break;
840  default:
841  if (mb_type <= B_SYM_16X16) {
842  av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
843  return AVERROR_INVALIDDATA;
844  }
845  av_assert2(mb_type < B_8X8);
846  flags = ff_cavs_partition_flags[mb_type];
847  if (mb_type & 1) { /* 16x8 macroblock types */
848  if (flags & FWD0)
849  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
850  if (flags & SYM0)
851  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
852  if (flags & FWD1)
853  ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
854  if (flags & SYM1)
855  mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
856  if (flags & BWD0)
857  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
858  if (flags & BWD1)
859  ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
860  } else { /* 8x16 macroblock types */
861  if (flags & FWD0)
862  ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
863  if (flags & SYM0)
864  mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
865  if (flags & FWD1)
866  ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
867  if (flags & SYM1)
868  mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
869  if (flags & BWD0)
870  ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
871  if (flags & BWD1)
872  ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
873  }
874  }
875  ff_cavs_inter(h, mb_type);
876  set_intra_mode_default(h);
877  if (mb_type != B_SKIP)
878  decode_residual_inter(h);
879  ff_cavs_filter(h, mb_type);
880 
881  return 0;
882 }
883 
884 /*****************************************************************************
885  *
886  * slice level
887  *
888  ****************************************************************************/
889 
890 static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
891 {
892  if (h->stc > 0xAF)
893  av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
894 
895  if (h->stc >= h->mb_height)
896  return -1;
897 
898  h->mby = h->stc;
899  h->mbidx = h->mby * h->mb_width;
900 
901  /* mark top macroblocks as unavailable */
902  h->flags &= ~(B_AVAIL | C_AVAIL);
903  if ((h->mby == 0) && (!h->qp_fixed)) {
904  h->qp_fixed = get_bits1(gb);
905  h->qp = get_bits(gb, 6);
906  }
907  /* inter frame or second slice can have weighting params */
908  if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
909  (!h->pic_structure && h->mby >= h->mb_width / 2))
910  if (get_bits1(gb)) { //slice_weighting_flag
911  av_log(h->avctx, AV_LOG_ERROR,
912  "weighted prediction not yet supported\n");
913  }
914  return 0;
915 }
916 
917 static inline int check_for_slice(AVSContext *h)
918 {
919  GetBitContext *gb = &h->gb;
920  int align;
921 
922  if (h->mbx)
923  return 0;
924  align = (-get_bits_count(gb)) & 7;
925  /* check for stuffing byte */
926  if (!align && (show_bits(gb, 8) == 0x80))
927  align = 8;
928  if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
929  skip_bits_long(gb, 24 + align);
930  h->stc = get_bits(gb, 8);
931  if (h->stc >= h->mb_height)
932  return 0;
933  decode_slice_header(h, gb);
934  return 1;
935  }
936  return 0;
937 }
938 
939 /*****************************************************************************
940  *
941  * frame level
942  *
943  ****************************************************************************/
944 
945 static int decode_pic(AVSContext *h)
946 {
947  int skip_count = -1;
948  int ret;
949  enum cavs_mb mb_type;
950 
951  av_frame_unref(h->cur.f);
952 
953  skip_bits(&h->gb, 16);//bbv_dwlay
954  if (h->stc == PIC_PB_START_CODE) {
955  h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
956  if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
957  av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
958  return -1;
959  }
960  /* make sure we have the reference frames we need */
961  if (!h->DPB[0].f->data[0] ||
962  (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
963  return -1;
964  } else {
965  h->cur.f->pict_type = AV_PICTURE_TYPE_I;
966  if (get_bits1(&h->gb))
967  skip_bits(&h->gb, 24);//time_code
968  /* old sample clips were all progressive and no low_delay,
969  bump stream revision if detected otherwise */
970  if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
971  h->stream_revision = 1;
972  /* similarly test top_field_first and repeat_first_field */
973  else if (show_bits(&h->gb, 11) & 3)
974  h->stream_revision = 1;
975  if (h->stream_revision > 0)
976  skip_bits(&h->gb, 1); //marker_bit
977  }
978 
979  if ((ret = ff_get_buffer(h->avctx, h->cur.f,
980  h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
981  0 : AV_GET_BUFFER_FLAG_REF)) < 0)
982  return ret;
983 
984  if (!h->edge_emu_buffer) {
985  int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
986  h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
987  if (!h->edge_emu_buffer)
988  return AVERROR(ENOMEM);
989  }
990 
991  if ((ret = ff_cavs_init_pic(h)) < 0)
992  return ret;
993  h->cur.poc = get_bits(&h->gb, 8) * 2;
994 
995  /* get temporal distances and MV scaling factors */
996  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
997  h->dist[0] = (h->cur.poc - h->DPB[0].poc + 512) % 512;
998  } else {
999  h->dist[0] = (h->DPB[0].poc - h->cur.poc + 512) % 512;
1000  }
1001  h->dist[1] = (h->cur.poc - h->DPB[1].poc + 512) % 512;
1002  h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
1003  h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
1004  if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
1005  h->sym_factor = h->dist[0] * h->scale_den[1];
1006  } else {
1007  h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
1008  h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
1009  }
1010 
1011  if (h->low_delay)
1012  get_ue_golomb(&h->gb); //bbv_check_times
1013  h->progressive = get_bits1(&h->gb);
1014  h->pic_structure = 1;
1015  if (!h->progressive)
1016  h->pic_structure = get_bits1(&h->gb);
1017  if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
1018  skip_bits1(&h->gb); //advanced_pred_mode_disable
1019  skip_bits1(&h->gb); //top_field_first
1020  skip_bits1(&h->gb); //repeat_first_field
1021  h->qp_fixed = get_bits1(&h->gb);
1022  h->qp = get_bits(&h->gb, 6);
1023  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1024  if (!h->progressive && !h->pic_structure)
1025  skip_bits1(&h->gb);//what is this?
1026  skip_bits(&h->gb, 4); //reserved bits
1027  } else {
1028  if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
1029  h->ref_flag = get_bits1(&h->gb);
1030  skip_bits(&h->gb, 4); //reserved bits
1031  h->skip_mode_flag = get_bits1(&h->gb);
1032  }
1033  h->loop_filter_disable = get_bits1(&h->gb);
1034  if (!h->loop_filter_disable && get_bits1(&h->gb)) {
1035  h->alpha_offset = get_se_golomb(&h->gb);
1036  h->beta_offset = get_se_golomb(&h->gb);
1037  } else {
1038  h->alpha_offset = h->beta_offset = 0;
1039  }
1040  if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1041  do {
1042  check_for_slice(h);
1043  decode_mb_i(h, 0);
1044  } while (ff_cavs_next_mb(h));
1045  } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
1046  do {
1047  if (check_for_slice(h))
1048  skip_count = -1;
1049  if (h->skip_mode_flag && (skip_count < 0))
1050  skip_count = get_ue_golomb(&h->gb);
1051  if (h->skip_mode_flag && skip_count--) {
1052  decode_mb_p(h, P_SKIP);
1053  } else {
1054  mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
1055  if (mb_type > P_8X8)
1056  decode_mb_i(h, mb_type - P_8X8 - 1);
1057  else
1058  decode_mb_p(h, mb_type);
1059  }
1060  } while (ff_cavs_next_mb(h));
1061  } else { /* AV_PICTURE_TYPE_B */
1062  do {
1063  if (check_for_slice(h))
1064  skip_count = -1;
1065  if (h->skip_mode_flag && (skip_count < 0))
1066  skip_count = get_ue_golomb(&h->gb);
1067  if (h->skip_mode_flag && skip_count--) {
1068  decode_mb_b(h, B_SKIP);
1069  } else {
1070  mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
1071  if (mb_type > B_8X8)
1072  decode_mb_i(h, mb_type - B_8X8 - 1);
1073  else
1074  decode_mb_b(h, mb_type);
1075  }
1076  } while (ff_cavs_next_mb(h));
1077  }
1078  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1079  av_frame_unref(h->DPB[1].f);
1080  FFSWAP(AVSFrame, h->cur, h->DPB[1]);
1081  FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
1082  }
1083  return 0;
1084 }
1085 
1086 /*****************************************************************************
1087  *
1088  * headers and interface
1089  *
1090  ****************************************************************************/
1091 
1092 static int decode_seq_header(AVSContext *h)
1093 {
1094  int frame_rate_code;
1095  int width, height;
1096 
1097  h->profile = get_bits(&h->gb, 8);
1098  h->level = get_bits(&h->gb, 8);
1099  skip_bits1(&h->gb); //progressive sequence
1100 
1101  width = get_bits(&h->gb, 14);
1102  height = get_bits(&h->gb, 14);
1103  if ((h->width || h->height) && (h->width != width || h->height != height)) {
1104  avpriv_report_missing_feature(h->avctx,
1105  "Width/height changing in CAVS");
1106  return AVERROR_PATCHWELCOME;
1107  }
1108  if (width <= 0 || height <= 0) {
1109  av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
1110  return AVERROR_INVALIDDATA;
1111  }
1112  h->width = width;
1113  h->height = height;
1114 
1115  skip_bits(&h->gb, 2); //chroma format
1116  skip_bits(&h->gb, 3); //sample_precision
1117  h->aspect_ratio = get_bits(&h->gb, 4);
1118  frame_rate_code = get_bits(&h->gb, 4);
1119  skip_bits(&h->gb, 18); //bit_rate_lower
1120  skip_bits1(&h->gb); //marker_bit
1121  skip_bits(&h->gb, 12); //bit_rate_upper
1122  h->low_delay = get_bits1(&h->gb);
1123  h->mb_width = (h->width + 15) >> 4;
1124  h->mb_height = (h->height + 15) >> 4;
1125  h->avctx->time_base.den = ff_mpeg12_frame_rate_tab[frame_rate_code].num;
1126  h->avctx->time_base.num = ff_mpeg12_frame_rate_tab[frame_rate_code].den;
1127  h->avctx->width = h->width;
1128  h->avctx->height = h->height;
1129  if (!h->top_qp)
1130  ff_cavs_init_top_lines(h);
1131  return 0;
1132 }
1133 
1134 static void cavs_flush(AVCodecContext * avctx)
1135 {
1136  AVSContext *h = avctx->priv_data;
1137  h->got_keyframe = 0;
1138 }
1139 
1140 static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1141  AVPacket *avpkt)
1142 {
1143  AVSContext *h = avctx->priv_data;
1144  const uint8_t *buf = avpkt->data;
1145  int buf_size = avpkt->size;
1146  uint32_t stc = -1;
1147  int input_size, ret;
1148  const uint8_t *buf_end;
1149  const uint8_t *buf_ptr;
1150 
1151  if (buf_size == 0) {
1152  if (!h->low_delay && h->DPB[0].f->data[0]) {
1153  *got_frame = 1;
1154  av_frame_move_ref(data, h->DPB[0].f);
1155  }
1156  return 0;
1157  }
1158 
1159  buf_ptr = buf;
1160  buf_end = buf + buf_size;
1161  for(;;) {
1162  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
1163  if ((stc & 0xFFFFFE00) || buf_ptr == buf_end)
1164  return FFMAX(0, buf_ptr - buf);
1165  input_size = (buf_end - buf_ptr) * 8;
1166  switch (stc) {
1167  case CAVS_START_CODE:
1168  init_get_bits(&h->gb, buf_ptr, input_size);
1169  decode_seq_header(h);
1170  break;
1171  case PIC_I_START_CODE:
1172  if (!h->got_keyframe) {
1173  av_frame_unref(h->DPB[0].f);
1174  av_frame_unref(h->DPB[1].f);
1175  h->got_keyframe = 1;
1176  }
1177  case PIC_PB_START_CODE:
1178  *got_frame = 0;
1179  if (!h->got_keyframe)
1180  break;
1181  if(!h->top_qp)
1182  break;
1183  init_get_bits(&h->gb, buf_ptr, input_size);
1184  h->stc = stc;
1185  if (decode_pic(h))
1186  break;
1187  *got_frame = 1;
1188  if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1189  if (h->DPB[1].f->data[0]) {
1190  if ((ret = av_frame_ref(data, h->DPB[1].f)) < 0)
1191  return ret;
1192  } else {
1193  *got_frame = 0;
1194  }
1195  } else {
1196  av_frame_move_ref(data, h->cur.f);
1197  }
1198  break;
1199  case EXT_START_CODE:
1200  //mpeg_decode_extension(avctx, buf_ptr, input_size);
1201  break;
1202  case USER_START_CODE:
1203  //mpeg_decode_user_data(avctx, buf_ptr, input_size);
1204  break;
1205  default:
1206  if (stc <= SLICE_MAX_START_CODE) {
1207  init_get_bits(&h->gb, buf_ptr, input_size);
1208  decode_slice_header(h, &h->gb);
1209  }
1210  break;
1211  }
1212  }
1213 }
1214 
1215 AVCodec ff_cavs_decoder = {
1216  .name = "cavs",
1217  .type = AVMEDIA_TYPE_VIDEO,
1218  .id = AV_CODEC_ID_CAVS,
1219  .priv_data_size = sizeof(AVSContext),
1220  .init = ff_cavs_init,
1221  .close = ff_cavs_end,
1222  .decode = cavs_decode_frame,
1223  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
1224  .flush = cavs_flush,
1225  .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
1226 };
AVSContext::intra_pred_c
void(* intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.h:228
AVSContext::top_border_v
uint8_t * top_border_v
Definition: cavs.h:222
show_bits_long
static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
Definition: get_bits.h:352
AVSContext::pic_structure
int pic_structure
Definition: cavs.h:179
AVSContext::top_border_u
uint8_t * top_border_u
Definition: cavs.h:222
ff_cavs_modify_mb_i
void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
Definition: cavs.c:352
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:205
chroma_dec
static const struct dec_2dvlc chroma_dec[5]
Definition: cavsdec.c:358
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
B_8X8
Definition: cavs.h:72
SLICE_MAX_START_CODE
#define SLICE_MAX_START_CODE
Definition: cavs.h:31
AVSContext::got_keyframe
int got_keyframe
Definition: cavs.h:238
AVSContext::avctx
AVCodecContext * avctx
Definition: cavs.h:163
dec_2dvlc::inc_limit
int inc_limit
Definition: cavs.h:153
shift
static int shift(int a, int b)
Definition: sonic.c:86
ref
FIXME Range Coding of cr are ref
Definition: snow.txt:367
AVSContext::edge_emu_buffer
uint8_t * edge_emu_buffer
Definition: cavs.h:236
AVSContext::direct_den
int direct_den[2]
for scaling in direct B block
Definition: cavs.h:233
AVSContext::cbp
int cbp
Definition: cavs.h:217
get_se_golomb
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:175
ff_cavs_intra_mv
const cavs_vector ff_cavs_intra_mv
mark block as using intra prediction
Definition: cavsdata.c:62
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
I_8X8
Definition: cavs.h:61
skip_bits_long
static void skip_bits_long(GetBitContext *s, int n)
Definition: get_bits.h:198
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
dequant_shift
static const uint8_t dequant_shift[64]
Definition: cavsdec.c:62
ff_cavs_end
av_cold int ff_cavs_end(AVCodecContext *avctx)
Definition: cavs.c:771
AVSContext::mbidx
int mbidx
macroblock coordinates
Definition: cavs.h:184
BWD1
#define BWD1
Definition: cavs.h:51
scan3x3
static const uint8_t scan3x3[4]
Definition: cavsdec.c:53
AVSContext::col_mv
cavs_vector * col_mv
Definition: cavs.h:205
AVSFrame::poc
int poc
Definition: cavs.h:159
B_DIRECT
Definition: cavs.h:68
AVRational::num
int num
numerator
Definition: rational.h:44
SYM1
#define SYM1
Definition: cavs.h:53
ff_cavs_init_mb
void ff_cavs_init_mb(AVSContext *h)
initialise predictors for motion vectors and intra prediction
Definition: cavs.c:592
mpegvideo.h
mpegvideo header.
P_8X16
Definition: cavs.h:65
AVSContext::qp
int qp
Definition: cavs.h:215
ScanTable::permutated
uint8_t permutated[64]
Definition: dsputil.h:116
run
uint8_t run
Definition: svq3.c:136
AVSContext::loop_filter_disable
int loop_filter_disable
Definition: cavs.h:181
DSPContext::clear_block
void(* clear_block)(int16_t *block)
Definition: dsputil.h:145
stride
int stride
Definition: mace.c:144
FFALIGN
#define FFALIGN(x, a)
Definition: common.h:63
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: libavcodec/avcodec.h:1253
d
set threshold d
Definition: extra/f0detectionyin.m:6
decode_seq_header
static int decode_seq_header(AVSContext *h)
Definition: cavsdec.c:1092
cavs_mb
cavs_mb
Definition: cavs.h:60
MV_BWD_OFFS
#define MV_BWD_OFFS
Definition: cavs.h:57
AVSContext::mbx
int mbx
Definition: cavs.h:184
AVSContext
struct AVSContext AVSContext
dequant
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:524
AVSContext::scantable
ScanTable scantable
Definition: cavs.h:218
FWD1
#define FWD1
Definition: cavs.h:49
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:183
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
m
window constants for m
Definition: extra/genbh92lobe.m:9
AVSContext::top_qp
uint8_t * top_qp
Definition: cavs.h:189
dec_2dvlc::rltab
int8_t rltab[59][3]
Definition: cavs.h:150
mv_scan
static const uint8_t mv_scan[4]
Definition: cavsdec.c:37
cavs_vector
cavs_vector
Definition: cavs.h:147
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:203
AVSContext::width
int width
Definition: cavs.h:176
CODEC_CAP_DR1
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: libavcodec/avcodec.h:743
PIC_I_START_CODE
#define PIC_I_START_CODE
Definition: cavs.h:35
av_frame_move_ref
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everythnig contained in src to dst and reset src.
Definition: frame.c:352
AVPacket::data
uint8_t * data
Definition: libavcodec/avcodec.h:1051
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:193
dec_2dvlc::golomb_order
int8_t golomb_order
Definition: cavs.h:152
get_bits.h
bitstream reader API header.
cavs_flush
static void cavs_flush(AVCodecContext *avctx)
Definition: cavsdec.c:1134
ff_cavs_filter
void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
in-loop deblocking filter for a single macroblock
Definition: cavs.c:106
AVSContext::dist
int dist[2]
temporal distances from current frame to ref frames
Definition: cavs.h:171
AVSContext::mby
int mby
Definition: cavs.h:184
AVSContext::gb
GetBitContext gb
Definition: cavs.h:168
AVSContext::cy
uint8_t * cy
Definition: cavs.h:187
avpriv_find_start_code
const uint8_t * avpriv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state)
U
#define U(x)
Definition: arm/vp56_arith.h:37
AVSContext::cu
uint8_t * cu
Definition: cavs.h:187
P_8X8
Definition: cavs.h:66
AVSContext::scale_den
int scale_den[2]
for scaling neighbouring MVs
Definition: cavs.h:234
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:945
AVSContext::progressive
int progressive
Definition: cavs.h:178
AVSContext::cur
AVSFrame cur
currently decoded frame
Definition: cavs.h:169
mask
static const uint16_t mask[17]
Definition: lzw.c:37
ff_cavs_next_mb
int ff_cavs_next_mb(AVSContext *h)
save predictors for later macroblocks and increase macroblock address
Definition: cavs.c:632
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: libavcodec/avcodec.h:770
B_SUB_FWD
Definition: cavs.h:77
ff_cavs_inter
void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
Definition: cavs.c:464
AVSContext::cdsp
CAVSDSPContext cdsp
Definition: cavs.h:167
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: libavutil/internal.h:123
data
Spectrum Plot time data
Definition: FFT of a Simple Sinusoid.m:14
r
const char * r
Definition: vf_curves.c:94
decode_slice_header
static int decode_slice_header(AVSContext *h, GetBitContext *gb)
Definition: cavsdec.c:890
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:40
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
av_log
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:246
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:178
AVCodec::name
const char * name
Name of the codec implementation.
Definition: libavcodec/avcodec.h:2861
round
static av_always_inline av_const double round(double x)
Definition: libm.h:162
AVSContext::c_stride
int c_stride
Definition: cavs.h:213
FFMAX
#define FFMAX(a, b)
Definition: common.h:56
avcodec.h
external API header
P_16X8
Definition: cavs.h:64
size
int size
Definition: twinvq_data.h:11127
AVSContext::skip_mode_flag
int skip_mode_flag
select between skip_count or one skip_flag per MB
Definition: cavs.h:180
AVSContext::DPB
AVSFrame DPB[2]
reference frames
Definition: cavs.h:170
B_AVAIL
#define B_AVAIL
Definition: cavs.h:39
EOB
#define EOB
Definition: cavsdec.c:84
dequant_mul
static const uint16_t dequant_mul[64]
Definition: cavsdec.c:73
SYM0
#define SYM0
Definition: cavs.h:52
AVSContext::cv
uint8_t * cv
current MB sample pointers
Definition: cavs.h:187
ff_cavs_load_intra_pred_chroma
void ff_cavs_load_intra_pred_chroma(AVSContext *h)
Definition: cavs.c:229
check_for_slice
static int check_for_slice(AVSContext *h)
Definition: cavsdec.c:917
AVSContext::stream_revision
int stream_revision
0 for samples from 2006, 1 for rm52j encoder
Definition: cavs.h:177
AVSContext::l_stride
int l_stride
Definition: cavs.h:213
BLK_8X16
Definition: cavs.h:115
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:216
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:144
NOT_AVAIL
#define NOT_AVAIL
Definition: cavs.h:42
ff_cavs_init
av_cold int ff_cavs_init(AVCodecContext *avctx)
Definition: cavs.c:727
FFMIN
#define FFMIN(a, b)
Definition: common.h:58
ff_cavs_decoder
AVCodec ff_cavs_decoder
Definition: cavsdec.c:1215
cavs_sub_mb
cavs_sub_mb
Definition: cavs.h:75
AVSContext::left_border_u
uint8_t left_border_u[10]
Definition: cavs.h:223
ret
ret
Definition: avfilter.c:821
AVCodecContext::width
int width
picture width / height.
Definition: libavcodec/avcodec.h:1302
ff_cavs_partition_flags
const uint8_t ff_cavs_partition_flags[30]
Definition: cavsdata.c:24
AVSContext::block
int16_t * block
Definition: cavs.h:239
ff_cavs_init_top_lines
void ff_cavs_init_top_lines(AVSContext *h)
some predictions require data from the top-neighbouring macroblock.
Definition: cavs.c:711
ESCAPE_CODE
#define ESCAPE_CODE
Definition: cavs.h:46
AVSContext::intra_pred_l
void(* intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.h:227
show_bits
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:255
ff_cavs_dir_mv
const cavs_vector ff_cavs_dir_mv
mark block as "no prediction from this direction" e.g.
Definition: cavsdata.c:59
FFABS
#define FFABS(a)
Definition: common.h:53
EXT_START_CODE
#define EXT_START_CODE
Definition: cavs.h:32
B_SUB_SYM
Definition: cavs.h:79
AVSContext::dsp
DSPContext dsp
Definition: cavs.h:164
AVSContext::left_border_v
uint8_t left_border_v[10]
Definition: cavs.h:223
AVSContext::level
int level
Definition: cavs.h:173
level
FIXME Range Coding of cr are level
Definition: snow.txt:367
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:539
flush
static void flush(AVCodecContext *avctx)
Definition: libavcodec/aacdec.c:472
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:695
BLK_16X8
Definition: cavs.h:114
NULL
NULL
Definition: eval.c:55
dec_2dvlc::max_run
int8_t max_run
Definition: cavs.h:154
width
static int width
Definition: tests/utils.c:158
mv_pred_direct
static void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw, cavs_vector *col_mv)
Definition: cavsdec.c:472
src
AVS_Value src
Definition: avisynth_c.h:523
BWD0
#define BWD0
Definition: cavs.h:50
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:101
AVCodecContext
main external API structure.
Definition: libavcodec/avcodec.h:1134
AVSContext::sym_factor
int sym_factor
for scaling in symmetrical B block
Definition: cavs.h:232
close
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:375
USER_START_CODE
#define USER_START_CODE
Definition: cavs.h:33
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:211
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: libavcodec/utils.c:823
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:148
cavs_block
cavs_block
Definition: cavs.h:112
B_SUB_BWD
Definition: cavs.h:78
buf
void * buf
Definition: avisynth_c.h:594
AVSContext::top_pred_Y
int * top_pred_Y
Definition: cavs.h:212
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:273
height
BYTE int const BYTE int int int height
Definition: avisynth_c.h:713
skip_bits1
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:298
cavs_decode_frame
static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: cavsdec.c:1140
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:265
CAVS_START_CODE
#define CAVS_START_CODE
Definition: cavs.h:34
intra_dec
static const struct dec_2dvlc intra_dec[7]
Definition: cavsdec.c:86
i
synthesis window for stochastic i
Definition: code Kat/hpsmodel.m:34
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:379
dec_2dvlc::level_add
int8_t level_add[27]
Definition: cavs.h:151
AVSContext::height
int height
Definition: cavs.h:176
AVSContext::alpha_offset
int alpha_offset
Definition: cavs.h:182
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:330
P_16X16
Definition: cavs.h:63
store_mvs
static void store_mvs(AVSContext *h)
Definition: cavsdec.c:464
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFilterBuffer structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Buffer references ownership and permissions
AVSContext::profile
int profile
Definition: cavs.h:173
PIC_PB_START_CODE
#define PIC_PB_START_CODE
Definition: cavs.h:36
CAVSDSPContext::cavs_idct8_add
void(* cavs_idct8_add)(uint8_t *dst, int16_t *block, int stride)
Definition: cavsdsp.h:35
AVSContext::stc
int stc
last start code
Definition: cavs.h:186
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.
flags
static int flags
Definition: cpu.c:23
av_frame_ref
int av_frame_ref(AVFrame *dst, AVFrame *src)
Setup a new reference to the data described by an given frame.
Definition: frame.c:228
AV_CODEC_ID_CAVS
Definition: libavcodec/avcodec.h:190
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:87
internal.h
common internal api header.
AVSContext::qp_fixed
int qp_fixed
Definition: cavs.h:216
AVSFrame
Definition: cavs.h:157
mv_pred_sym
static void mv_pred_sym(AVSContext *h, cavs_vector *src, enum cavs_block size)
Definition: cavsdec.c:491
cavs_chroma_qp
static const uint8_t cavs_chroma_qp[64]
Definition: cavsdec.c:55
AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:218
AVSContext::flags
int flags
availability flags of neighbouring macroblocks
Definition: cavs.h:185
AVRational::den
int den
denominator
Definition: rational.h:45
P_SKIP
Definition: cavs.h:62
AVSContext::luma_scan
int luma_scan[4]
Definition: cavs.h:214
get_ue_code
static int get_ue_code(GetBitContext *gb, int order)
kth-order exponential golomb code
Definition: cavsdec.c:511
AVSContext::mb_height
int mb_height
Definition: cavs.h:175
AVSContext::beta_offset
int beta_offset
Definition: cavs.h:182
ff_cavs_init_pic
int ff_cavs_init_pic(AVSContext *h)
Definition: cavs.c:676
inter_dec
static const struct dec_2dvlc inter_dec[7]
Definition: cavsdec.c:222
dst
else dst[i][x+y *dst_stride[i]]
Definition: vf_mcdeint.c:160
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:554
BLK_8X8
Definition: cavs.h:116
dec_2dvlc
Definition: cavs.h:149
FWD0
#define FWD0
Definition: cavs.h:48
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:143
set_mvs
static void set_mvs(cavs_vector *mv, enum cavs_block size)
Definition: cavs.h:246
decode
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: crystalhd.c:868
B_SKIP
Definition: cavs.h:67
AVSContext::aspect_ratio
int aspect_ratio
Definition: cavs.h:174
decode_residual_inter
static int decode_residual_inter(AVSContext *h)
Definition: cavsdec.c:605
FFSWAP
#define FFSWAP(type, a, b)
Definition: common.h:61
set_intra_mode_default
static void set_intra_mode_default(AVSContext *h)
Definition: cavsdec.c:713
golomb.h
exp golomb vlc stuff
AVPacket
This structure stores compressed data.
Definition: libavcodec/avcodec.h:1028
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: libavcodec/avcodec.h:909
ff_mpeg12_frame_rate_tab
const AVRational ff_mpeg12_frame_rate_tab[16]
Definition: mpeg12data.c:308
AVSContext::mb_width
int mb_width
Definition: cavs.h:175
AVSFrame::f
AVFrame * f
Definition: cavs.h:158
AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:217
AVSContext::low_delay
int low_delay
Definition: cavs.h:172
AVSContext::col_type_base
uint8_t * col_type_base
Definition: cavs.h:229
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