FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/cavsdec.c
Date: 2025-12-07 22:02:57
Exec Total Coverage
Lines: 447 569 78.6%
Functions: 17 19 89.5%
Branches: 262 368 71.2%
Line Branch Exec Source
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/attributes.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/emms.h"
31 #include "libavutil/mem.h"
32 #include "avcodec.h"
33 #include "get_bits.h"
34 #include "golomb.h"
35 #include "cavs.h"
36 #include "codec_internal.h"
37 #include "decode.h"
38 #include "mathops.h"
39 #include "mpeg12data.h"
40 #include "startcode.h"
41
42 static const uint8_t mv_scan[4] = {
43 MV_FWD_X0, MV_FWD_X1,
44 MV_FWD_X2, MV_FWD_X3
45 };
46
47 static const uint8_t cbp_tab[64][2] = {
48 { 63, 0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, { 0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 },
49 { 7, 14 }, { 5, 11 }, { 10, 12 }, { 8, 5 }, { 12, 10 }, { 61, 7 }, { 4, 48 }, { 55, 3 },
50 { 1, 2 }, { 2, 8 }, { 59, 4 }, { 3, 1 }, { 62, 61 }, { 9, 55 }, { 6, 59 }, { 29, 62 },
51 { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53, 9 }, { 30, 6 },
52 { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 },
53 { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 },
54 { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 },
55 { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 }
56 };
57
58 static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
59
60 static const uint8_t dequant_shift[64] = {
61 14, 14, 14, 14, 14, 14, 14, 14,
62 13, 13, 13, 13, 13, 13, 13, 13,
63 13, 12, 12, 12, 12, 12, 12, 12,
64 11, 11, 11, 11, 11, 11, 11, 11,
65 11, 10, 10, 10, 10, 10, 10, 10,
66 10, 9, 9, 9, 9, 9, 9, 9,
67 9, 8, 8, 8, 8, 8, 8, 8,
68 7, 7, 7, 7, 7, 7, 7, 7
69 };
70
71 static const uint16_t dequant_mul[64] = {
72 32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
73 32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
74 65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
75 32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
76 65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
77 65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
78 65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
79 32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
80 };
81
82 #define EOB 0, 0, 0
83
84 static const struct dec_2dvlc intra_dec[7] = {
85 {
86 { //level / run / table_inc
87 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
88 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
89 { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
90 { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 },
91 { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
92 { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 },
93 { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 },
94 { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 },
95 { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 },
96 { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB }
97 },
98 //level_add
99 { 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 },
100 2, //golomb_order
101 0, //inc_limit
102 23, //max_run
103 },
104 {
105 { //level / run
106 { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 },
107 { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
108 { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 },
109 { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 },
110 { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 },
111 { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 },
112 { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 },
113 { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 },
114 { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 },
115 { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 }
116 },
117 //level_add
118 { 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 },
119 2, //golomb_order
120 1, //inc_limit
121 15, //max_run
122 },
123 {
124 { //level / run
125 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 },
126 { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
127 { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
128 { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
129 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 },
130 { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
131 { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 },
132 { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 },
133 { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 },
134 { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 }
135 },
136 //level_add
137 { 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 },
138 2, //golomb_order
139 2, //inc_limit
140 10, //max_run
141 },
142 {
143 { //level / run
144 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
145 { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 },
146 { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 },
147 { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
148 { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
149 { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 },
150 { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 },
151 { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 },
152 { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 },
153 { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 }
154 },
155 //level_add
156 { 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 },
157 2, //golomb_order
158 4, //inc_limit
159 7, //max_run
160 },
161 {
162 { //level / run
163 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
164 { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
165 { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 },
166 { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 },
167 {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 },
168 {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 },
169 {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 },
170 { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 },
171 {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 },
172 { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 }
173 },
174 //level_add
175 { 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 },
176 2, //golomb_order
177 7, //inc_limit
178 5, //max_run
179 },
180 {
181 { //level / run
182 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
183 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
184 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
185 { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 },
186 {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 },
187 { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 },
188 { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 },
189 {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 },
190 { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 },
191 { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }
192 },
193 //level_add
194 { 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 },
195 2, //golomb_order
196 10, //inc_limit
197 3, //max_run
198 },
199 {
200 { //level / run
201 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
202 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
203 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
204 { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 },
205 {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 },
206 {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 },
207 {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 },
208 {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 },
209 {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 },
210 {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 }
211 },
212 //level_add
213 { 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 },
214 2, //golomb_order
215 INT_MAX, //inc_limit
216 2, //max_run
217 }
218 };
219
220 static const struct dec_2dvlc inter_dec[7] = {
221 {
222 { //level / run
223 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
224 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
225 { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
226 { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 },
227 { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 },
228 { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 },
229 { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 },
230 { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 },
231 { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
232 { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB }
233 },
234 //level_add
235 { 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 },
236 3, //golomb_order
237 0, //inc_limit
238 26 //max_run
239 },
240 {
241 { //level / run
242 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 },
243 { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
244 { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 },
245 { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 },
246 { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 },
247 { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 },
248 { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 },
249 { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 },
250 { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 },
251 { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 }
252 },
253 //level_add
254 { 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 },
255 2, //golomb_order
256 1, //inc_limit
257 19 //max_run
258 },
259 {
260 { //level / run
261 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 },
262 { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 },
263 { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
264 { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 },
265 { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 },
266 { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 },
267 { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 },
268 { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 },
269 { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 },
270 { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 }
271 },
272 //level_add
273 { 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 },
274 2, //golomb_order
275 2, //inc_limit
276 14 //max_run
277 },
278 {
279 { //level / run
280 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
281 { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
282 { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 },
283 { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 },
284 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 },
285 { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
286 { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 },
287 { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 },
288 { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 },
289 { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 }
290 },
291 //level_add
292 { 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 },
293 2, //golomb_order
294 3, //inc_limit
295 10 //max_run
296 },
297 {
298 { //level / run
299 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
300 { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 },
301 { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 },
302 { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
303 { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
304 { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 },
305 { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 },
306 {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 },
307 { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 },
308 { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 }
309 },
310 //level_add
311 { 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 },
312 2, //golomb_order
313 6, //inc_limit
314 7 //max_run
315 },
316 {
317 { //level / run
318 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
319 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 },
320 { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 },
321 { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 },
322 { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 },
323 { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 },
324 { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 },
325 { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 },
326 { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 },
327 { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 }
328 },
329 //level_add
330 { 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 },
331 2, //golomb_order
332 9, //inc_limit
333 5 //max_run
334 },
335 {
336 { //level / run
337 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
338 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
339 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 },
340 { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
341 { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 },
342 { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 },
343 { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 },
344 { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 },
345 { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 },
346 { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 }
347 },
348 //level_add
349 { 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 },
350 2, //golomb_order
351 INT_MAX, //inc_limit
352 4 //max_run
353 }
354 };
355
356 static const struct dec_2dvlc chroma_dec[5] = {
357 {
358 { //level / run
359 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
360 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
361 { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 },
362 { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 },
363 { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
364 { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 },
365 { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 },
366 { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 },
367 { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
368 { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB }
369 },
370 //level_add
371 { 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 },
372 2, //golomb_order
373 0, //inc_limit
374 25 //max_run
375 },
376 {
377 { //level / run
378 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 },
379 { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
380 { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 },
381 { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 },
382 { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 },
383 { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 },
384 { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 },
385 { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 },
386 { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 },
387 { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 }
388 },
389 //level_add
390 { 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 },
391 0, //golomb_order
392 1, //inc_limit
393 20 //max_run
394 },
395 {
396 { //level / run
397 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
398 { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 },
399 { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
400 { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
401 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 },
402 { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 },
403 { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 },
404 { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 },
405 { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 },
406 { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 },
407 },
408 //level_add
409 { 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 },
410 1, //golomb_order
411 2, //inc_limit
412 11 //max_run
413 },
414 {
415 { //level / run
416 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
417 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 },
418 { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 },
419 { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 },
420 { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 },
421 { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 },
422 {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 },
423 { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 },
424 {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 },
425 {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 },
426 },
427 //level_add
428 { 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 },
429 1, //golomb_order
430 4, //inc_limit
431 8 //max_run
432 },
433 {
434 { //level / run
435 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
436 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
437 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 },
438 { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
439 { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 },
440 { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 },
441 { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 },
442 { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 },
443 { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 },
444 { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 },
445 },
446 //level_add
447 { 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 },
448 0, //golomb_order
449 INT_MAX, //inc_limit
450 5, //max_run
451 }
452 };
453
454 #undef EOB
455
456 /*****************************************************************************
457 *
458 * motion vector prediction
459 *
460 ****************************************************************************/
461
462 83018 static inline void store_mvs(AVSContext *h)
463 {
464 83018 h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0];
465 83018 h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1];
466 83018 h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2];
467 83018 h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3];
468 83018 }
469
470 529812 static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
471 cavs_vector *col_mv)
472 {
473 529812 cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
474 529812 unsigned den = h->direct_den[col_mv->ref];
475 529812 int m = FF_SIGNBIT(col_mv->x);
476
477 529812 pmv_fw->dist = h->dist[1];
478 529812 pmv_bw->dist = h->dist[0];
479 529812 pmv_fw->ref = 1;
480 529812 pmv_bw->ref = 0;
481 /* scale the co-located motion vector according to its temporal span */
482 529812 pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
483 529812 pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
484 529812 m = FF_SIGNBIT(col_mv->y);
485 529812 pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
486 529812 pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
487 529812 }
488
489 28390 static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
490 enum cavs_block size)
491 {
492 28390 cavs_vector *dst = src + MV_BWD_OFFS;
493
494 /* backward mv is the scaled and negated forward mv */
495 28390 dst->x = -((src->x * h->sym_factor + 256) >> 9);
496 28390 dst->y = -((src->y * h->sym_factor + 256) >> 9);
497 28390 dst->ref = 0;
498 28390 dst->dist = h->dist[0];
499 28390 set_mvs(dst, size);
500 28390 }
501
502 /*****************************************************************************
503 *
504 * residual data decoding
505 *
506 ****************************************************************************/
507
508 /** kth-order exponential golomb code */
509 2771829 static inline int get_ue_code(GetBitContext *gb, int order)
510 {
511 2771829 unsigned ret = get_ue_golomb(gb);
512
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 2771829 if (ret >= ((1U<<31)>>order)) {
513 3 av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too large\n");
514 3 return AVERROR_INVALIDDATA;
515 }
516
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 2771826 if (order) {
517 2385003 return (ret<<order) + get_bits(gb, order);
518 }
519 386823 return ret;
520 }
521
522 351853 static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
523 int16_t *dst, int mul, int shift, int coeff_num)
524 {
525 351853 int round = 1 << (shift - 1);
526 351853 int pos = -1;
527 351853 const uint8_t *scantab = h->permutated_scantable;
528
529 /* inverse scan and dequantization */
530
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 2699181 while (--coeff_num >= 0) {
531 2347328 pos += run_buf[coeff_num];
532
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 2347328 if (pos > 63) {
533 ✗ av_log(h->avctx, AV_LOG_ERROR,
534 "position out of block bounds at pic %d MB(%d,%d)\n",
535 h->cur.poc, h->mbx, h->mby);
536 ✗ return AVERROR_INVALIDDATA;
537 }
538 2347328 dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift;
539 }
540 351853 return 0;
541 }
542
543 /**
544 * decode coefficients from one 8x8 block, dequantize, inverse transform
545 * and add them to sample block
546 * @param r pointer to 2D VLC table
547 * @param esc_golomb_order escape codes are k-golomb with this order k
548 * @param qp quantizer
549 * @param dst location of sample block
550 * @param stride line stride in frame buffer
551 */
552 351856 static int decode_residual_block(AVSContext *h, GetBitContext *gb,
553 const struct dec_2dvlc *r, int esc_golomb_order,
554 int qp, uint8_t *dst, ptrdiff_t stride)
555 {
556 int i, esc_code, level, mask, ret;
557 unsigned int level_code, run;
558 int16_t level_buf[65];
559 uint8_t run_buf[65];
560 351856 int16_t *block = h->block;
561
562
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 2699187 for (i = 0; i < 65; i++) {
563 2699187 level_code = get_ue_code(gb, r->golomb_order);
564
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 2699187 if (level_code >= ESCAPE_CODE) {
565 72645 run = ((level_code - ESCAPE_CODE) >> 1) + 1;
566
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 72645 if(run > 64) {
567 3 av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run);
568 3 return AVERROR_INVALIDDATA;
569 }
570 72642 esc_code = get_ue_code(gb, esc_golomb_order);
571
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 72642 if (esc_code < 0 || esc_code > 32767) {
572 ✗ av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n");
573 ✗ return AVERROR_INVALIDDATA;
574 }
575
576
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 72642 level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
577
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 141547 while (level > r->inc_limit)
578 68905 r++;
579 72642 mask = -(level_code & 1);
580 72642 level = (level ^ mask) - mask;
581 } else {
582 2626542 level = r->rltab[level_code][0];
583
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 2626542 if (!level) //end of block signal
584 351853 break;
585 2274689 run = r->rltab[level_code][1];
586 2274689 r += r->rltab[level_code][2];
587 }
588 2347331 level_buf[i] = level;
589 2347331 run_buf[i] = run;
590 }
591
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 351853 if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp],
592 351853 dequant_shift[qp], i)) < 0)
593 ✗ return ret;
594 351853 h->cdsp.cavs_idct8_add(dst, block, stride);
595 351853 h->bdsp.clear_block(block);
596 351853 return 0;
597 }
598
599
600 167967 static inline int decode_residual_chroma(AVSContext *h)
601 {
602
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 167967 if (h->cbp & (1 << 4)) {
603 62645 int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
604 62645 ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride);
605
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 62645 if (ret < 0)
606 1 return ret;
607 }
608
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 167966 if (h->cbp & (1 << 5)) {
609 70265 int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
610 70265 ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride);
611
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 70265 if (ret < 0)
612 ✗ return ret;
613 }
614 167966 return 0;
615 }
616
617 145359 static inline int decode_residual_inter(AVSContext *h)
618 {
619 int block;
620
621 /* get coded block pattern */
622 145359 int cbp = get_ue_golomb(&h->gb);
623
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 145359 if (cbp > 63U) {
624 ✗ av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
625 ✗ return AVERROR_INVALIDDATA;
626 }
627 145359 h->cbp = cbp_tab[cbp][1];
628
629 /* get quantizer */
630
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 145359 if (h->cbp && !h->qp_fixed)
631 ✗ h->qp = (h->qp + (unsigned)get_se_golomb(&h->gb)) & 63;
632
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 726795 for (block = 0; block < 4; block++)
633
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 581436 if (h->cbp & (1 << block))
634 182411 decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
635 182411 h->cy + h->luma_scan[block], h->l_stride);
636 145359 decode_residual_chroma(h);
637
638 145359 return 0;
639 }
640
641 /*****************************************************************************
642 *
643 * macroblock level
644 *
645 ****************************************************************************/
646
647 22608 static inline void set_mv_intra(AVSContext *h)
648 {
649 22608 h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
650 22608 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
651 22608 h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
652 22608 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
653
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 22608 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B)
654 19042 h->col_type_base[h->mbidx] = I_8X8;
655 22608 }
656
657 22608 static int decode_mb_i(AVSContext *h, int cbp_code)
658 {
659 22608 GetBitContext *gb = &h->gb;
660 unsigned pred_mode_uv;
661 int block;
662 uint8_t top[18];
663 22608 uint8_t *left = NULL;
664 uint8_t *d;
665 int ret;
666
667 22608 ff_cavs_init_mb(h);
668
669 /* get intra prediction modes from stream */
670
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 113040 for (block = 0; block < 4; block++) {
671 int nA, nB, predpred;
672 90432 int pos = scan3x3[block];
673
674 90432 nA = h->pred_mode_Y[pos - 1];
675 90432 nB = h->pred_mode_Y[pos - 3];
676 90432 predpred = FFMIN(nA, nB);
677
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 90432 if (predpred == NOT_AVAIL) // if either is not available
678 1555 predpred = INTRA_L_LP;
679
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 90432 if (!get_bits1(gb)) {
680 16265 int rem_mode = get_bits(gb, 2);
681 16265 predpred = rem_mode + (rem_mode >= predpred);
682 }
683 90432 h->pred_mode_Y[pos] = predpred;
684 }
685 22608 pred_mode_uv = get_ue_golomb_31(gb);
686
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 22608 if (pred_mode_uv > 6) {
687 ✗ av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
688 ✗ return AVERROR_INVALIDDATA;
689 }
690 22608 ff_cavs_modify_mb_i(h, &pred_mode_uv);
691
692 /* get coded block pattern */
693
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 22608 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
694 11340 cbp_code = get_ue_golomb(gb);
695
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 22608 if (cbp_code > 63U) {
696 ✗ av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
697 ✗ return AVERROR_INVALIDDATA;
698 }
699 22608 h->cbp = cbp_tab[cbp_code][0];
700
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 22608 if (h->cbp && !h->qp_fixed)
701 ✗ h->qp = (h->qp + (unsigned)get_se_golomb(gb)) & 63; //qp_delta
702
703 /* luma intra prediction interleaved with residual decode/transform/add */
704
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 113040 for (block = 0; block < 4; block++) {
705 90432 d = h->cy + h->luma_scan[block];
706 90432 ff_cavs_load_intra_pred_luma(h, top, &left, block);
707 90432 h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
708 (d, top, left, h->l_stride);
709
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 90432 if (h->cbp & (1<<block)) {
710 36535 ret = decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
711
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 36535 if (ret < 0)
712 ✗ return ret;
713 }
714 }
715
716 /* chroma intra prediction */
717 22608 ff_cavs_load_intra_pred_chroma(h);
718 22608 h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
719 22608 h->left_border_u, h->c_stride);
720 22608 h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
721 22608 h->left_border_v, h->c_stride);
722
723 22608 ret = decode_residual_chroma(h);
724
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 22608 if (ret < 0)
725 ✗ return ret;
726 22608 ff_cavs_filter(h, I_8X8);
727 22608 set_mv_intra(h);
728 22608 return 0;
729 }
730
731 275137 static inline void set_intra_mode_default(AVSContext *h)
732 {
733
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 275137 if (h->stream_revision > 0) {
734 ✗ h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
735 ✗ h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
736 } else {
737 275137 h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
738 275137 h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
739 }
740 275137 }
741
742 83018 static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
743 {
744 83018 GetBitContext *gb = &h->gb;
745 int ref[4];
746
747 83018 ff_cavs_init_mb(h);
748
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 83018 switch (mb_type) {
749 20801 case P_SKIP:
750 20801 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
751 20801 break;
752 48877 case P_16X16:
753
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 48877 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
754 48877 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
755 48877 break;
756 3399 case P_16X8:
757
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 3399 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
758
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 3399 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
759 3399 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
760 3399 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
761 3399 break;
762 3154 case P_8X16:
763
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 3154 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
764
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 3154 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
765 3154 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
766 3154 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
767 3154 break;
768 6787 case P_8X8:
769
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 6787 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
770
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 6787 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
771
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 6787 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
772
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 6787 ref[3] = h->ref_flag ? 0 : get_bits1(gb);
773 6787 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
774 6787 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
775 6787 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
776 6787 ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
777 }
778 83018 ff_cavs_inter(h, mb_type);
779 83018 set_intra_mode_default(h);
780 83018 store_mvs(h);
781
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 83018 if (mb_type != P_SKIP)
782 62217 decode_residual_inter(h);
783 83018 ff_cavs_filter(h, mb_type);
784 83018 h->col_type_base[h->mbidx] = mb_type;
785 83018 }
786
787 192119 static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
788 {
789 int block;
790 enum cavs_sub_mb sub_type[4];
791 int flags;
792
793 192119 ff_cavs_init_mb(h);
794
795 /* reset all MVs */
796 192119 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
797 192119 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
798 192119 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
799 192119 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
800
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 192119 switch (mb_type) {
801 146934 case B_SKIP:
802 case B_DIRECT:
803
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 146934 if (!h->col_type_base[h->mbidx]) {
804 /* intra MB at co-location, do in-plane prediction */
805 14481 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
806 14481 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
807 } else
808 /* direct prediction from co-located P MB, block-wise */
809
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 662265 for (block = 0; block < 4; block++)
810 529812 mv_pred_direct(h, &h->mv[mv_scan[block]],
811 529812 &h->col_mv[h->mbidx * 4 + block]);
812 146934 break;
813 7402 case B_FWD_16X16:
814 7402 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
815 7402 break;
816 3134 case B_SYM_16X16:
817 3134 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
818 3134 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
819 3134 break;
820 5806 case B_BWD_16X16:
821 5806 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
822 5806 break;
823 13958 case B_8X8:
824 #define TMP_UNUSED_INX 7
825 13958 flags = 0;
826
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 69790 for (block = 0; block < 4; block++)
827 55832 sub_type[block] = get_bits(&h->gb, 2);
828
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 69790 for (block = 0; block < 4; block++) {
829
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 55832 switch (sub_type[block]) {
830 ✗ case B_SUB_DIRECT:
831 ✗ if (!h->col_type_base[h->mbidx]) {
832 /* intra MB at co-location, do in-plane prediction */
833 ✗ if(flags==0) {
834 // if col-MB is a Intra MB, current Block size is 16x16.
835 // AVS standard section 9.9.1
836 ✗ if(block>0){
837 ✗ h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ];
838 ✗ h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
839 }
840 ✗ ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2,
841 MV_PRED_BSKIP, BLK_8X8, 1);
842 ✗ ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS,
843 MV_FWD_C2+MV_BWD_OFFS,
844 MV_PRED_BSKIP, BLK_8X8, 0);
845 ✗ if(block>0) {
846 ✗ flags = mv_scan[block];
847 ✗ h->mv[flags ] = h->mv[MV_FWD_X0 ];
848 ✗ h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
849 ✗ h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ];
850 ✗ h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS];
851 } else
852 ✗ flags = MV_FWD_X0;
853 } else {
854 ✗ h->mv[mv_scan[block] ] = h->mv[flags ];
855 ✗ h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS];
856 }
857 } else
858 ✗ mv_pred_direct(h, &h->mv[mv_scan[block]],
859 ✗ &h->col_mv[h->mbidx * 4 + block]);
860 ✗ break;
861 20568 case B_SUB_FWD:
862 20568 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
863 MV_PRED_MEDIAN, BLK_8X8, 1);
864 20568 break;
865 16611 case B_SUB_SYM:
866 16611 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
867 MV_PRED_MEDIAN, BLK_8X8, 1);
868 16611 mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
869 16611 break;
870 }
871 }
872 #undef TMP_UNUSED_INX
873
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 69790 for (block = 0; block < 4; block++) {
874
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 55832 if (sub_type[block] == B_SUB_BWD)
875 18653 ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
876 18653 mv_scan[block] + MV_BWD_OFFS - 3,
877 MV_PRED_MEDIAN, BLK_8X8, 0);
878 }
879 13958 break;
880 14885 default:
881
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 14885 if (mb_type <= B_SYM_16X16) {
882 ✗ av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
883 ✗ return AVERROR_INVALIDDATA;
884 }
885 av_assert2(mb_type < B_8X8);
886 14885 flags = ff_cavs_partition_flags[mb_type];
887
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 14885 if (mb_type & 1) { /* 16x8 macroblock types */
888
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 7963 if (flags & FWD0)
889 5332 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
890
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 7963 if (flags & SYM0)
891 2146 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
892
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 7963 if (flags & FWD1)
893 5436 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
894
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 7963 if (flags & SYM1)
895 2500 mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
896
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 7963 if (flags & BWD0)
897 2631 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
898
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 7963 if (flags & BWD1)
899 2527 ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
900 } else { /* 8x16 macroblock types */
901
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 6922 if (flags & FWD0)
902 4634 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
903
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 6922 if (flags & SYM0)
904 1978 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
905
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 6922 if (flags & FWD1)
906 4590 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
907
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 6922 if (flags & SYM1)
908 2021 mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
909
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 6922 if (flags & BWD0)
910 2288 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
911
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 6922 if (flags & BWD1)
912 2332 ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
913 }
914 }
915 192119 ff_cavs_inter(h, mb_type);
916 192119 set_intra_mode_default(h);
917
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 192119 if (mb_type != B_SKIP)
918 83142 decode_residual_inter(h);
919 192119 ff_cavs_filter(h, mb_type);
920
921 192119 return 0;
922 }
923
924 /*****************************************************************************
925 *
926 * slice level
927 *
928 ****************************************************************************/
929
930 ✗ static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
931 {
932 ✗ if (h->stc > 0xAF)
933 ✗ av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
934
935 ✗ if (h->stc >= h->mb_height) {
936 ✗ av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc);
937 ✗ return AVERROR_INVALIDDATA;
938 }
939
940 ✗ h->mby = h->stc;
941 ✗ h->mbidx = h->mby * h->mb_width;
942
943 /* mark top macroblocks as unavailable */
944 ✗ h->flags &= ~(B_AVAIL | C_AVAIL);
945 ✗ if (!h->pic_qp_fixed) {
946 ✗ h->qp_fixed = get_bits1(gb);
947 ✗ h->qp = get_bits(gb, 6);
948 }
949 /* inter frame or second slice can have weighting params */
950 ✗ if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
951 ✗ (!h->pic_structure && h->mby >= h->mb_width / 2))
952 ✗ if (get_bits1(gb)) { //slice_weighting_flag
953 ✗ av_log(h->avctx, AV_LOG_ERROR,
954 "weighted prediction not yet supported\n");
955 }
956 ✗ return 0;
957 }
958
959 297746 static inline int check_for_slice(AVSContext *h)
960 {
961 297746 GetBitContext *gb = &h->gb;
962 int align;
963
964
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 297746 if (h->mbx)
965 291129 return 0;
966 6617 align = (-get_bits_count(gb)) & 7;
967 /* check for stuffing byte */
968
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 6617 if (!align && (show_bits(gb, 8) == 0x80))
969 3 align = 8;
970
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 6617 if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
971 ✗ skip_bits_long(gb, 24 + align);
972 ✗ h->stc = get_bits(gb, 8);
973 ✗ if (h->stc >= h->mb_height)
974 ✗ return 0;
975 ✗ decode_slice_header(h, gb);
976 ✗ return 1;
977 }
978 6617 return 0;
979 }
980
981 /*****************************************************************************
982 *
983 * frame level
984 *
985 ****************************************************************************/
986
987 184 static int decode_pic(AVSContext *h)
988 {
989 int ret;
990 184 int skip_count = -1;
991 enum cavs_mb mb_type;
992
993
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 184 if (!h->top_qp) {
994 ✗ av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n");
995 ✗ return AVERROR_INVALIDDATA;
996 }
997
998 184 av_frame_unref(h->cur.f);
999
1000 184 skip_bits(&h->gb, 16);//bbv_dwlay
1001
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 184 if (h->stc == PIC_PB_START_CODE) {
1002 177 h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
1003
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 177 if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
1004 ✗ av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
1005 ✗ return AVERROR_INVALIDDATA;
1006 }
1007 /* make sure we have the reference frames we need */
1008
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 177 if (!h->DPB[0].f->data[0] ||
1009
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 177 (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
1010 ✗ return AVERROR_INVALIDDATA;
1011 } else {
1012 7 h->cur.f->pict_type = AV_PICTURE_TYPE_I;
1013
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 7 if (get_bits1(&h->gb))
1014 ✗ skip_bits(&h->gb, 24);//time_code
1015 /* old sample clips were all progressive and no low_delay,
1016 bump stream revision if detected otherwise */
1017
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 7 if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
1018 ✗ h->stream_revision = 1;
1019 /* similarly test top_field_first and repeat_first_field */
1020
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 7 else if (show_bits(&h->gb, 11) & 3)
1021 ✗ h->stream_revision = 1;
1022
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 7 if (h->stream_revision > 0)
1023 ✗ skip_bits(&h->gb, 1); //marker_bit
1024 }
1025
1026
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 184 if (get_bits_left(&h->gb) < 23)
1027 ✗ return AVERROR_INVALIDDATA;
1028
1029 184 ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
1030 0 : AV_GET_BUFFER_FLAG_REF);
1031
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 184 if (ret < 0)
1032 ✗ return ret;
1033
1034
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 184 if (!h->edge_emu_buffer) {
1035 2 int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
1036 2 h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
1037
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 2 if (!h->edge_emu_buffer)
1038 ✗ return AVERROR(ENOMEM);
1039 }
1040
1041
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 184 if ((ret = ff_cavs_init_pic(h)) < 0)
1042 ✗ return ret;
1043 184 h->cur.poc = get_bits(&h->gb, 8) * 2;
1044
1045 /* get temporal distances and MV scaling factors */
1046
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 184 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1047 63 h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511;
1048 } else {
1049 121 h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511;
1050 }
1051 184 h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511;
1052
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 184 h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
1053
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 184 h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
1054
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 184 if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
1055 121 h->sym_factor = h->dist[0] * h->scale_den[1];
1056
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 121 if (FFABS(h->sym_factor) > 32768) {
1057 ✗ av_log(h->avctx, AV_LOG_ERROR, "sym_factor %d too large\n", h->sym_factor);
1058 ✗ return AVERROR_INVALIDDATA;
1059 }
1060 } else {
1061
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 63 h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
1062
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 63 h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
1063 }
1064
1065
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 184 if (h->low_delay)
1066 ✗ get_ue_golomb(&h->gb); //bbv_check_times
1067 184 h->progressive = get_bits1(&h->gb);
1068 184 h->pic_structure = 1;
1069
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 184 if (!h->progressive)
1070 ✗ h->pic_structure = get_bits1(&h->gb);
1071
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 184 if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
1072 ✗ skip_bits1(&h->gb); //advanced_pred_mode_disable
1073 184 skip_bits1(&h->gb); //top_field_first
1074 184 skip_bits1(&h->gb); //repeat_first_field
1075 184 h->pic_qp_fixed =
1076 184 h->qp_fixed = get_bits1(&h->gb);
1077 184 h->qp = get_bits(&h->gb, 6);
1078
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 184 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1079
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 7 if (!h->progressive && !h->pic_structure)
1080 ✗ skip_bits1(&h->gb);//what is this?
1081 7 skip_bits(&h->gb, 4); //reserved bits
1082 } else {
1083
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 177 if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
1084 56 h->ref_flag = get_bits1(&h->gb);
1085 177 skip_bits(&h->gb, 4); //reserved bits
1086 177 h->skip_mode_flag = get_bits1(&h->gb);
1087 }
1088 184 h->loop_filter_disable = get_bits1(&h->gb);
1089
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 184 if (!h->loop_filter_disable && get_bits1(&h->gb)) {
1090 ✗ h->alpha_offset = get_se_golomb(&h->gb);
1091 ✗ h->beta_offset = get_se_golomb(&h->gb);
1092 ✗ if ( h->alpha_offset < -64 || h->alpha_offset > 64
1093 ✗ || h-> beta_offset < -64 || h-> beta_offset > 64) {
1094 ✗ h->alpha_offset = h->beta_offset = 0;
1095 ✗ return AVERROR_INVALIDDATA;
1096 }
1097 } else {
1098 184 h->alpha_offset = h->beta_offset = 0;
1099 }
1100
1101 184 ret = 0;
1102
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 184 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1103 do {
1104 11340 check_for_slice(h);
1105 11340 ret = decode_mb_i(h, 0);
1106
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 11340 if (ret < 0)
1107 ✗ break;
1108
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 11340 } while (ff_cavs_next_mb(h));
1109
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 177 } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
1110 do {
1111
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 90720 if (check_for_slice(h))
1112 ✗ skip_count = -1;
1113
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 90720 if (h->skip_mode_flag && (skip_count < 0)) {
1114
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 69924 if (get_bits_left(&h->gb) < 1) {
1115 ✗ ret = AVERROR_INVALIDDATA;
1116 ✗ break;
1117 }
1118 69924 skip_count = get_ue_golomb(&h->gb);
1119 }
1120
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 90720 if (h->skip_mode_flag && skip_count--) {
1121 20801 decode_mb_p(h, P_SKIP);
1122 } else {
1123
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 69919 if (get_bits_left(&h->gb) < 1) {
1124 ✗ ret = AVERROR_INVALIDDATA;
1125 ✗ break;
1126 }
1127 69919 mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
1128
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 69919 if (mb_type > P_8X8)
1129 7702 ret = decode_mb_i(h, mb_type - P_8X8 - 1);
1130 else
1131 62217 decode_mb_p(h, mb_type);
1132 }
1133
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 90720 if (ret < 0)
1134 ✗ break;
1135
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 90720 } while (ff_cavs_next_mb(h));
1136 } else { /* AV_PICTURE_TYPE_B */
1137 do {
1138
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 195686 if (check_for_slice(h))
1139 ✗ skip_count = -1;
1140
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 195686 if (h->skip_mode_flag && (skip_count < 0)) {
1141
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 86746 if (get_bits_left(&h->gb) < 1) {
1142 1 ret = AVERROR_INVALIDDATA;
1143 1 break;
1144 }
1145 86745 skip_count = get_ue_golomb(&h->gb);
1146 }
1147
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 195685 if (h->skip_mode_flag && skip_count--) {
1148 108977 ret = decode_mb_b(h, B_SKIP);
1149 } else {
1150
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 86708 if (get_bits_left(&h->gb) < 1) {
1151 ✗ ret = AVERROR_INVALIDDATA;
1152 ✗ break;
1153 }
1154 86708 mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
1155
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 86708 if (mb_type > B_8X8)
1156 3566 ret = decode_mb_i(h, mb_type - B_8X8 - 1);
1157 else
1158 83142 ret = decode_mb_b(h, mb_type);
1159 }
1160
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 195685 if (ret < 0)
1161 ✗ break;
1162
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 195685 } while (ff_cavs_next_mb(h));
1163 }
1164 184 emms_c();
1165
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 184 if (ret >= 0 && h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1166 63 av_frame_unref(h->DPB[1].f);
1167 63 FFSWAP(AVSFrame, h->cur, h->DPB[1]);
1168 63 FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
1169 }
1170 184 return ret;
1171 }
1172
1173 /*****************************************************************************
1174 *
1175 * headers and interface
1176 *
1177 ****************************************************************************/
1178
1179 7 static int decode_seq_header(AVSContext *h)
1180 {
1181 int frame_rate_code;
1182 int width, height;
1183 int ret;
1184
1185 7 h->profile = get_bits(&h->gb, 8);
1186
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 7 if (h->profile != 0x20) {
1187 ✗ avpriv_report_missing_feature(h->avctx,
1188 "only support JiZhun profile");
1189 ✗ return AVERROR_PATCHWELCOME;
1190 }
1191 7 h->level = get_bits(&h->gb, 8);
1192 7 skip_bits1(&h->gb); //progressive sequence
1193
1194 7 width = get_bits(&h->gb, 14);
1195 7 height = get_bits(&h->gb, 14);
1196
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 7 if ((h->width || h->height) && (h->width != width || h->height != height)) {
1197 ✗ avpriv_report_missing_feature(h->avctx,
1198 "Width/height changing in CAVS");
1199 ✗ return AVERROR_PATCHWELCOME;
1200 }
1201
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 7 if (width <= 0 || height <= 0) {
1202 ✗ av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
1203 ✗ return AVERROR_INVALIDDATA;
1204 }
1205 7 skip_bits(&h->gb, 2); //chroma format
1206 7 skip_bits(&h->gb, 3); //sample_precision
1207 7 h->aspect_ratio = get_bits(&h->gb, 4);
1208 7 frame_rate_code = get_bits(&h->gb, 4);
1209
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 7 if (frame_rate_code == 0 || frame_rate_code > 13) {
1210 ✗ av_log(h->avctx, AV_LOG_WARNING,
1211 "frame_rate_code %d is invalid\n", frame_rate_code);
1212 ✗ frame_rate_code = 1;
1213 }
1214
1215 7 skip_bits(&h->gb, 18); //bit_rate_lower
1216 7 skip_bits1(&h->gb); //marker_bit
1217 7 skip_bits(&h->gb, 12); //bit_rate_upper
1218 7 h->low_delay = get_bits1(&h->gb);
1219
1220 7 ret = ff_set_dimensions(h->avctx, width, height);
1221
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 7 if (ret < 0)
1222 ✗ return ret;
1223
1224 7 h->width = width;
1225 7 h->height = height;
1226 7 h->mb_width = (h->width + 15) >> 4;
1227 7 h->mb_height = (h->height + 15) >> 4;
1228 7 h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
1229
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 7 if (!h->top_qp)
1230 2 return ff_cavs_init_top_lines(h);
1231 5 return 0;
1232 }
1233
1234 ✗ static av_cold void cavs_flush(AVCodecContext * avctx)
1235 {
1236 ✗ AVSContext *h = avctx->priv_data;
1237 ✗ h->got_keyframe = 0;
1238 ✗ }
1239
1240 186 static int cavs_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
1241 int *got_frame, AVPacket *avpkt)
1242 {
1243 186 AVSContext *h = avctx->priv_data;
1244 186 const uint8_t *buf = avpkt->data;
1245 186 int buf_size = avpkt->size;
1246 186 uint32_t stc = -1;
1247 int input_size, ret;
1248 const uint8_t *buf_end;
1249 const uint8_t *buf_ptr;
1250 186 int frame_start = 0;
1251
1252
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 186 if (buf_size == 0) {
1253
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 2 if (!h->low_delay && h->DPB[0].f->data[0]) {
1254 1 *got_frame = 1;
1255 1 av_frame_move_ref(rframe, h->DPB[0].f);
1256 }
1257 2 return 0;
1258 }
1259
1260 184 h->stc = 0;
1261
1262 184 buf_ptr = buf;
1263 184 buf_end = buf + buf_size;
1264 for(;;) {
1265 379 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
1266
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 379 if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) {
1267
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 184 if (!h->stc)
1268 ✗ av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n");
1269 184 return FFMAX(0, buf_ptr - buf);
1270 }
1271 195 input_size = (buf_end - buf_ptr) * 8;
1272
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 195 switch (stc) {
1273 7 case CAVS_START_CODE:
1274 7 init_get_bits(&h->gb, buf_ptr, input_size);
1275 7 decode_seq_header(h);
1276 7 break;
1277 7 case PIC_I_START_CODE:
1278
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 7 if (!h->got_keyframe) {
1279 2 av_frame_unref(h->DPB[0].f);
1280 2 av_frame_unref(h->DPB[1].f);
1281 2 h->got_keyframe = 1;
1282 }
1283 case PIC_PB_START_CODE:
1284
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 184 if (frame_start > 1)
1285 ✗ return AVERROR_INVALIDDATA;
1286 184 frame_start ++;
1287
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 184 if (*got_frame)
1288 ✗ av_frame_unref(rframe);
1289 184 *got_frame = 0;
1290
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 184 if (!h->got_keyframe)
1291 ✗ break;
1292 184 init_get_bits(&h->gb, buf_ptr, input_size);
1293 184 h->stc = stc;
1294
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 184 if (decode_pic(h))
1295 1 break;
1296 183 *got_frame = 1;
1297
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 183 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1298
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 63 if (h->DPB[!h->low_delay].f->data[0]) {
1299
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 61 if ((ret = av_frame_ref(rframe, h->DPB[!h->low_delay].f)) < 0)
1300 ✗ return ret;
1301 } else {
1302 2 *got_frame = 0;
1303 }
1304 } else {
1305 120 av_frame_move_ref(rframe, h->cur.f);
1306 }
1307 183 break;
1308 2 case EXT_START_CODE:
1309 //mpeg_decode_extension(avctx, buf_ptr, input_size);
1310 2 break;
1311 2 case USER_START_CODE:
1312 //mpeg_decode_user_data(avctx, buf_ptr, input_size);
1313 2 break;
1314 ✗ default:
1315 ✗ if (stc <= SLICE_MAX_START_CODE) {
1316 ✗ init_get_bits(&h->gb, buf_ptr, input_size);
1317 ✗ decode_slice_header(h, &h->gb);
1318 }
1319 ✗ break;
1320 }
1321 }
1322 }
1323
1324 const FFCodec ff_cavs_decoder = {
1325 .p.name = "cavs",
1326 CODEC_LONG_NAME("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
1327 .p.type = AVMEDIA_TYPE_VIDEO,
1328 .p.id = AV_CODEC_ID_CAVS,
1329 .priv_data_size = sizeof(AVSContext),
1330 .init = ff_cavs_init,
1331 .close = ff_cavs_end,
1332 FF_CODEC_DECODE_CB(cavs_decode_frame),
1333 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1334 .flush = cavs_flush,
1335 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1336 };
1337