FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/cavsdec.c
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 445 563 79.0%
Branches: 260 364 71.4%

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/avassert.h"
29 #include "avcodec.h"
30 #include "get_bits.h"
31 #include "golomb.h"
32 #include "cavs.h"
33 #include "internal.h"
34 #include "mpeg12data.h"
35
36 static const uint8_t mv_scan[4] = {
37 MV_FWD_X0, MV_FWD_X1,
38 MV_FWD_X2, MV_FWD_X3
39 };
40
41 static const uint8_t cbp_tab[64][2] = {
42 { 63, 0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, { 0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 },
43 { 7, 14 }, { 5, 11 }, { 10, 12 }, { 8, 5 }, { 12, 10 }, { 61, 7 }, { 4, 48 }, { 55, 3 },
44 { 1, 2 }, { 2, 8 }, { 59, 4 }, { 3, 1 }, { 62, 61 }, { 9, 55 }, { 6, 59 }, { 29, 62 },
45 { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53, 9 }, { 30, 6 },
46 { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 },
47 { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 },
48 { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 },
49 { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 }
50 };
51
52 static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
53
54 static const uint8_t dequant_shift[64] = {
55 14, 14, 14, 14, 14, 14, 14, 14,
56 13, 13, 13, 13, 13, 13, 13, 13,
57 13, 12, 12, 12, 12, 12, 12, 12,
58 11, 11, 11, 11, 11, 11, 11, 11,
59 11, 10, 10, 10, 10, 10, 10, 10,
60 10, 9, 9, 9, 9, 9, 9, 9,
61 9, 8, 8, 8, 8, 8, 8, 8,
62 7, 7, 7, 7, 7, 7, 7, 7
63 };
64
65 static const uint16_t dequant_mul[64] = {
66 32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
67 32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
68 65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
69 32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
70 65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
71 65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
72 65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
73 32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
74 };
75
76 #define EOB 0, 0, 0
77
78 static const struct dec_2dvlc intra_dec[7] = {
79 {
80 { //level / run / table_inc
81 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
82 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
83 { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
84 { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 },
85 { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
86 { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 },
87 { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 },
88 { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 },
89 { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 },
90 { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB }
91 },
92 //level_add
93 { 0, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1 },
94 2, //golomb_order
95 0, //inc_limit
96 23, //max_run
97 },
98 {
99 { //level / run
100 { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 },
101 { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
102 { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 },
103 { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 },
104 { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 },
105 { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 },
106 { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 },
107 { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 },
108 { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 },
109 { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 }
110 },
111 //level_add
112 { 0, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
113 2, //golomb_order
114 1, //inc_limit
115 15, //max_run
116 },
117 {
118 { //level / run
119 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 },
120 { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
121 { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
122 { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
123 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 },
124 { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
125 { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 },
126 { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 },
127 { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 },
128 { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 }
129 },
130 //level_add
131 { 0, 10, 6, 4, 4, 3, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
132 2, //golomb_order
133 2, //inc_limit
134 10, //max_run
135 },
136 {
137 { //level / run
138 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
139 { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 },
140 { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 },
141 { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
142 { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
143 { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 },
144 { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 },
145 { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 },
146 { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 },
147 { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 }
148 },
149 //level_add
150 { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
151 2, //golomb_order
152 4, //inc_limit
153 7, //max_run
154 },
155 {
156 { //level / run
157 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
158 { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
159 { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 },
160 { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 },
161 {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 },
162 {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 },
163 {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 },
164 { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 },
165 {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 },
166 { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 }
167 },
168 //level_add
169 { 0,18, 8, 4, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
170 2, //golomb_order
171 7, //inc_limit
172 5, //max_run
173 },
174 {
175 { //level / run
176 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
177 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
178 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
179 { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 },
180 {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 },
181 { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 },
182 { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 },
183 {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 },
184 { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 },
185 { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }
186 },
187 //level_add
188 { 0, 22, 7, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
189 2, //golomb_order
190 10, //inc_limit
191 3, //max_run
192 },
193 {
194 { //level / run
195 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
196 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
197 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
198 { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 },
199 {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 },
200 {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 },
201 {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 },
202 {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 },
203 {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 },
204 {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 }
205 },
206 //level_add
207 { 0, 27, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
208 2, //golomb_order
209 INT_MAX, //inc_limit
210 2, //max_run
211 }
212 };
213
214 static const struct dec_2dvlc inter_dec[7] = {
215 {
216 { //level / run
217 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
218 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
219 { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
220 { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 },
221 { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 },
222 { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 },
223 { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 },
224 { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 },
225 { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
226 { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB }
227 },
228 //level_add
229 { 0, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 },
230 3, //golomb_order
231 0, //inc_limit
232 26 //max_run
233 },
234 {
235 { //level / run
236 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 },
237 { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
238 { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 },
239 { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 },
240 { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 },
241 { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 },
242 { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 },
243 { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 },
244 { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 },
245 { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 }
246 },
247 //level_add
248 { 0, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1 },
249 2, //golomb_order
250 1, //inc_limit
251 19 //max_run
252 },
253 {
254 { //level / run
255 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 },
256 { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 },
257 { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
258 { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 },
259 { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 },
260 { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 },
261 { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 },
262 { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 },
263 { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 },
264 { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 }
265 },
266 //level_add
267 { 0, 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
268 2, //golomb_order
269 2, //inc_limit
270 14 //max_run
271 },
272 {
273 { //level / run
274 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
275 { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
276 { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 },
277 { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 },
278 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 },
279 { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
280 { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 },
281 { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 },
282 { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 },
283 { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 }
284 },
285 //level_add
286 { 0,10, 6, 5, 4, 3, 3, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
287 2, //golomb_order
288 3, //inc_limit
289 10 //max_run
290 },
291 {
292 { //level / run
293 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
294 { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 },
295 { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 },
296 { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
297 { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
298 { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 },
299 { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 },
300 {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 },
301 { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 },
302 { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 }
303 },
304 //level_add
305 { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
306 2, //golomb_order
307 6, //inc_limit
308 7 //max_run
309 },
310 {
311 { //level / run
312 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
313 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 },
314 { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 },
315 { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 },
316 { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 },
317 { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 },
318 { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 },
319 { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 },
320 { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 },
321 { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 }
322 },
323 //level_add
324 { 0, 17, 8, 4, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
325 2, //golomb_order
326 9, //inc_limit
327 5 //max_run
328 },
329 {
330 { //level / run
331 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
332 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
333 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 },
334 { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
335 { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 },
336 { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 },
337 { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 },
338 { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 },
339 { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 },
340 { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 }
341 },
342 //level_add
343 { 0, 22, 6, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
344 2, //golomb_order
345 INT_MAX, //inc_limit
346 4 //max_run
347 }
348 };
349
350 static const struct dec_2dvlc chroma_dec[5] = {
351 {
352 { //level / run
353 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
354 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
355 { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 },
356 { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 },
357 { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
358 { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 },
359 { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 },
360 { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 },
361 { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
362 { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB }
363 },
364 //level_add
365 { 0, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1 },
366 2, //golomb_order
367 0, //inc_limit
368 25 //max_run
369 },
370 {
371 { //level / run
372 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 },
373 { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
374 { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 },
375 { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 },
376 { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 },
377 { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 },
378 { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 },
379 { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 },
380 { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 },
381 { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 }
382 },
383 //level_add
384 { 0, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1 },
385 0, //golomb_order
386 1, //inc_limit
387 20 //max_run
388 },
389 {
390 { //level / run
391 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
392 { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 },
393 { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
394 { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
395 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 },
396 { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 },
397 { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 },
398 { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 },
399 { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 },
400 { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 },
401 },
402 //level_add
403 { 0,10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
404 1, //golomb_order
405 2, //inc_limit
406 11 //max_run
407 },
408 {
409 { //level / run
410 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
411 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 },
412 { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 },
413 { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 },
414 { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 },
415 { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 },
416 {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 },
417 { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 },
418 {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 },
419 {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 },
420 },
421 //level_add
422 { 0, 14, 7, 4, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
423 1, //golomb_order
424 4, //inc_limit
425 8 //max_run
426 },
427 {
428 { //level / run
429 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
430 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
431 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 },
432 { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
433 { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 },
434 { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 },
435 { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 },
436 { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 },
437 { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 },
438 { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 },
439 },
440 //level_add
441 { 0, 20, 7, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
442 0, //golomb_order
443 INT_MAX, //inc_limit
444 5, //max_run
445 }
446 };
447
448 #undef EOB
449
450 /*****************************************************************************
451 *
452 * motion vector prediction
453 *
454 ****************************************************************************/
455
456 83018 static inline void store_mvs(AVSContext *h)
457 {
458 83018 h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0];
459 83018 h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1];
460 83018 h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2];
461 83018 h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3];
462 83018 }
463
464 522204 static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
465 cavs_vector *col_mv)
466 {
467 522204 cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
468 522204 unsigned den = h->direct_den[col_mv->ref];
469 522204 int m = FF_SIGNBIT(col_mv->x);
470
471 522204 pmv_fw->dist = h->dist[1];
472 522204 pmv_bw->dist = h->dist[0];
473 522204 pmv_fw->ref = 1;
474 522204 pmv_bw->ref = 0;
475 /* scale the co-located motion vector according to its temporal span */
476 522204 pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
477 522204 pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
478 522204 m = FF_SIGNBIT(col_mv->y);
479 522204 pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
480 522204 pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
481 522204 }
482
483 28257 static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
484 enum cavs_block size)
485 {
486 28257 cavs_vector *dst = src + MV_BWD_OFFS;
487
488 /* backward mv is the scaled and negated forward mv */
489 28257 dst->x = -((src->x * h->sym_factor + 256) >> 9);
490 28257 dst->y = -((src->y * h->sym_factor + 256) >> 9);
491 28257 dst->ref = 0;
492 28257 dst->dist = h->dist[0];
493 28257 set_mvs(dst, size);
494 28257 }
495
496 /*****************************************************************************
497 *
498 * residual data decoding
499 *
500 ****************************************************************************/
501
502 /** kth-order exponential golomb code */
503 2762076 static inline int get_ue_code(GetBitContext *gb, int order)
504 {
505 2762076 unsigned ret = get_ue_golomb(gb);
506
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2762076 if (ret >= ((1U<<31)>>order)) {
507 3 av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n");
508 3 return AVERROR_INVALIDDATA;
509 }
510
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2762073 if (order) {
511 2377209 return (ret<<order) + get_bits(gb, order);
512 }
513 384864 return ret;
514 }
515
516 351600 static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
517 int16_t *dst, int mul, int shift, int coeff_num)
518 {
519 351600 int round = 1 << (shift - 1);
520 351600 int pos = -1;
521 351600 const uint8_t *scantab = h->scantable.permutated;
522
523 /* inverse scan and dequantization */
524
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2689692 while (--coeff_num >= 0) {
525 2338092 pos += run_buf[coeff_num];
526
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2338092 if (pos > 63) {
527 av_log(h->avctx, AV_LOG_ERROR,
528 "position out of block bounds at pic %d MB(%d,%d)\n",
529 h->cur.poc, h->mbx, h->mby);
530 return AVERROR_INVALIDDATA;
531 }
532 2338092 dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift;
533 }
534 351600 return 0;
535 }
536
537 /**
538 * decode coefficients from one 8x8 block, dequantize, inverse transform
539 * and add them to sample block
540 * @param r pointer to 2D VLC table
541 * @param esc_golomb_order escape codes are k-golomb with this order k
542 * @param qp quantizer
543 * @param dst location of sample block
544 * @param stride line stride in frame buffer
545 */
546 351603 static int decode_residual_block(AVSContext *h, GetBitContext *gb,
547 const struct dec_2dvlc *r, int esc_golomb_order,
548 int qp, uint8_t *dst, ptrdiff_t stride)
549 {
550 int i, esc_code, level, mask, ret;
551 unsigned int level_code, run;
552 int16_t level_buf[65];
553 uint8_t run_buf[65];
554 351603 int16_t *block = h->block;
555
556
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2689698 for (i = 0; i < 65; i++) {
557 2689698 level_code = get_ue_code(gb, r->golomb_order);
558
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2689698 if (level_code >= ESCAPE_CODE) {
559 72381 run = ((level_code - ESCAPE_CODE) >> 1) + 1;
560
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72381 if(run > 64) {
561 3 av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run);
562 3 return AVERROR_INVALIDDATA;
563 }
564 72378 esc_code = get_ue_code(gb, esc_golomb_order);
565
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72378 if (esc_code < 0 || esc_code > 32767) {
566 av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n");
567 return AVERROR_INVALIDDATA;
568 }
569
570
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72378 level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
571
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140649 while (level > r->inc_limit)
572 68271 r++;
573 72378 mask = -(level_code & 1);
574 72378 level = (level ^ mask) - mask;
575 } else {
576 2617317 level = r->rltab[level_code][0];
577
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2617317 if (!level) //end of block signal
578 351600 break;
579 2265717 run = r->rltab[level_code][1];
580 2265717 r += r->rltab[level_code][2];
581 }
582 2338095 level_buf[i] = level;
583 2338095 run_buf[i] = run;
584 }
585
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351600 if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp],
586 351600 dequant_shift[qp], i)) < 0)
587 return ret;
588 351600 h->cdsp.cavs_idct8_add(dst, block, stride);
589 351600 h->bdsp.clear_block(block);
590 351600 return 0;
591 }
592
593
594 169615 static inline int decode_residual_chroma(AVSContext *h)
595 {
596
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169615 if (h->cbp & (1 << 4)) {
597 62361 int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
598 62361 ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride);
599
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62361 if (ret < 0)
600 1 return ret;
601 }
602
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169614 if (h->cbp & (1 << 5)) {
603 69792 int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
604 69792 ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride);
605
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69792 if (ret < 0)
606 return ret;
607 }
608 169614 return 0;
609 }
610
611 144271 static inline int decode_residual_inter(AVSContext *h)
612 {
613 int block;
614
615 /* get coded block pattern */
616 144271 int cbp = get_ue_golomb(&h->gb);
617
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144271 if (cbp > 63U) {
618 av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
619 return AVERROR_INVALIDDATA;
620 }
621 144271 h->cbp = cbp_tab[cbp][1];
622
623 /* get quantizer */
624
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144271 if (h->cbp && !h->qp_fixed)
625 h->qp = (h->qp + (unsigned)get_se_golomb(&h->gb)) & 63;
626
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721355 for (block = 0; block < 4; block++)
627
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577084 if (h->cbp & (1 << block))
628 180859 decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
629 180859 h->cy + h->luma_scan[block], h->l_stride);
630 144271 decode_residual_chroma(h);
631
632 144271 return 0;
633 }
634
635 /*****************************************************************************
636 *
637 * macroblock level
638 *
639 ****************************************************************************/
640
641 25344 static inline void set_mv_intra(AVSContext *h)
642 {
643 25344 h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
644 25344 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
645 25344 h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
646 25344 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
647
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25344 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B)
648 22282 h->col_type_base[h->mbidx] = I_8X8;
649 25344 }
650
651 25344 static int decode_mb_i(AVSContext *h, int cbp_code)
652 {
653 25344 GetBitContext *gb = &h->gb;
654 unsigned pred_mode_uv;
655 int block;
656 uint8_t top[18];
657 25344 uint8_t *left = NULL;
658 uint8_t *d;
659 int ret;
660
661 25344 ff_cavs_init_mb(h);
662
663 /* get intra prediction modes from stream */
664
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126720 for (block = 0; block < 4; block++) {
665 int nA, nB, predpred;
666 101376 int pos = scan3x3[block];
667
668 101376 nA = h->pred_mode_Y[pos - 1];
669 101376 nB = h->pred_mode_Y[pos - 3];
670 101376 predpred = FFMIN(nA, nB);
671
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101376 if (predpred == NOT_AVAIL) // if either is not available
672 1877 predpred = INTRA_L_LP;
673
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101376 if (!get_bits1(gb)) {
674 17093 int rem_mode = get_bits(gb, 2);
675 17093 predpred = rem_mode + (rem_mode >= predpred);
676 }
677 101376 h->pred_mode_Y[pos] = predpred;
678 }
679 25344 pred_mode_uv = get_ue_golomb_31(gb);
680
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25344 if (pred_mode_uv > 6) {
681 av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
682 return AVERROR_INVALIDDATA;
683 }
684 25344 ff_cavs_modify_mb_i(h, &pred_mode_uv);
685
686 /* get coded block pattern */
687
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25344 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
688 14580 cbp_code = get_ue_golomb(gb);
689
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25344 if (cbp_code > 63U) {
690 av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
691 return AVERROR_INVALIDDATA;
692 }
693 25344 h->cbp = cbp_tab[cbp_code][0];
694
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25344 if (h->cbp && !h->qp_fixed)
695 h->qp = (h->qp + (unsigned)get_se_golomb(gb)) & 63; //qp_delta
696
697 /* luma intra prediction interleaved with residual decode/transform/add */
698
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126720 for (block = 0; block < 4; block++) {
699 101376 d = h->cy + h->luma_scan[block];
700 101376 ff_cavs_load_intra_pred_luma(h, top, &left, block);
701 101376 h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
702 (d, top, left, h->l_stride);
703
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101376 if (h->cbp & (1<<block)) {
704 38591 ret = decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
705
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38591 if (ret < 0)
706 return ret;
707 }
708 }
709
710 /* chroma intra prediction */
711 25344 ff_cavs_load_intra_pred_chroma(h);
712 25344 h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
713 25344 h->left_border_u, h->c_stride);
714 25344 h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
715 25344 h->left_border_v, h->c_stride);
716
717 25344 ret = decode_residual_chroma(h);
718
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25344 if (ret < 0)
719 return ret;
720 25344 ff_cavs_filter(h, I_8X8);
721 25344 set_mv_intra(h);
722 25344 return 0;
723 }
724
725 272401 static inline void set_intra_mode_default(AVSContext *h)
726 {
727
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272401 if (h->stream_revision > 0) {
728 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
729 h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
730 } else {
731 272401 h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
732 272401 h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
733 }
734 272401 }
735
736 83018 static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
737 {
738 83018 GetBitContext *gb = &h->gb;
739 int ref[4];
740
741 83018 ff_cavs_init_mb(h);
742
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83018 switch (mb_type) {
743 20801 case P_SKIP:
744 20801 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
745 20801 break;
746 48877 case P_16X16:
747
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48877 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
748 48877 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
749 48877 break;
750 3399 case P_16X8:
751
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3399 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
752
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3399 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
753 3399 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
754 3399 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
755 3399 break;
756 3154 case P_8X16:
757
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3154 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
758
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3154 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
759 3154 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
760 3154 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
761 3154 break;
762 6787 case P_8X8:
763
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6787 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
764
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6787 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
765
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6787 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
766
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6787 ref[3] = h->ref_flag ? 0 : get_bits1(gb);
767 6787 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
768 6787 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
769 6787 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
770 6787 ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
771 }
772 83018 ff_cavs_inter(h, mb_type);
773 83018 set_intra_mode_default(h);
774 83018 store_mvs(h);
775
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83018 if (mb_type != P_SKIP)
776 62217 decode_residual_inter(h);
777 83018 ff_cavs_filter(h, mb_type);
778 83018 h->col_type_base[h->mbidx] = mb_type;
779 83018 }
780
781 189383 static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
782 {
783 int block;
784 enum cavs_sub_mb sub_type[4];
785 int flags;
786
787 189383 ff_cavs_init_mb(h);
788
789 /* reset all MVs */
790 189383 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
791 189383 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
792 189383 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
793 189383 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
794
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189383 switch (mb_type) {
795 144973 case B_SKIP:
796 case B_DIRECT:
797
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144973 if (!h->col_type_base[h->mbidx]) {
798 /* intra MB at co-location, do in-plane prediction */
799 14422 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
800 14422 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
801 } else
802 /* direct prediction from co-located P MB, block-wise */
803
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652755 for (block = 0; block < 4; block++)
804 522204 mv_pred_direct(h, &h->mv[mv_scan[block]],
805 522204 &h->col_mv[h->mbidx * 4 + block]);
806 144973 break;
807 7233 case B_FWD_16X16:
808 7233 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
809 7233 break;
810 3127 case B_SYM_16X16:
811 3127 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
812 3127 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
813 3127 break;
814 5750 case B_BWD_16X16:
815 5750 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
816 5750 break;
817 13716 case B_8X8:
818 #define TMP_UNUSED_INX 7
819 13716 flags = 0;
820
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68580 for (block = 0; block < 4; block++)
821 54864 sub_type[block] = get_bits(&h->gb, 2);
822
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68580 for (block = 0; block < 4; block++) {
823
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54864 switch (sub_type[block]) {
824 case B_SUB_DIRECT:
825 if (!h->col_type_base[h->mbidx]) {
826 /* intra MB at co-location, do in-plane prediction */
827 if(flags==0) {
828 // if col-MB is a Intra MB, current Block size is 16x16.
829 // AVS standard section 9.9.1
830 if(block>0){
831 h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ];
832 h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
833 }
834 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2,
835 MV_PRED_BSKIP, BLK_8X8, 1);
836 ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS,
837 MV_FWD_C2+MV_BWD_OFFS,
838 MV_PRED_BSKIP, BLK_8X8, 0);
839 if(block>0) {
840 flags = mv_scan[block];
841 h->mv[flags ] = h->mv[MV_FWD_X0 ];
842 h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
843 h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ];
844 h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS];
845 } else
846 flags = MV_FWD_X0;
847 } else {
848 h->mv[mv_scan[block] ] = h->mv[flags ];
849 h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS];
850 }
851 } else
852 mv_pred_direct(h, &h->mv[mv_scan[block]],
853 &h->col_mv[h->mbidx * 4 + block]);
854 break;
855 20044 case B_SUB_FWD:
856 20044 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
857 MV_PRED_MEDIAN, BLK_8X8, 1);
858 20044 break;
859 16522 case B_SUB_SYM:
860 16522 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
861 MV_PRED_MEDIAN, BLK_8X8, 1);
862 16522 mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
863 16522 break;
864 }
865 }
866 #undef TMP_UNUSED_INX
867
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68580 for (block = 0; block < 4; block++) {
868
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54864 if (sub_type[block] == B_SUB_BWD)
869 18298 ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
870 18298 mv_scan[block] + MV_BWD_OFFS - 3,
871 MV_PRED_MEDIAN, BLK_8X8, 0);
872 }
873 13716 break;
874 14584 default:
875
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14584 if (mb_type <= B_SYM_16X16) {
876 av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
877 return AVERROR_INVALIDDATA;
878 }
879 av_assert2(mb_type < B_8X8);
880 14584 flags = ff_cavs_partition_flags[mb_type];
881
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14584 if (mb_type & 1) { /* 16x8 macroblock types */
882
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7810 if (flags & FWD0)
883 5218 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
884
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7810 if (flags & SYM0)
885 2134 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
886
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7810 if (flags & FWD1)
887 5320 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
888
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7810 if (flags & SYM1)
889 2490 mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
890
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7810 if (flags & BWD0)
891 2592 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
892
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7810 if (flags & BWD1)
893 2490 ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
894 } else { /* 8x16 macroblock types */
895
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6774 if (flags & FWD0)
896 4531 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
897
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6774 if (flags & SYM0)
898 1972 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
899
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6774 if (flags & FWD1)
900 4491 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
901
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6774 if (flags & SYM1)
902 2012 mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
903
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6774 if (flags & BWD0)
904 2243 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
905
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6774 if (flags & BWD1)
906 2283 ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
907 }
908 }
909 189383 ff_cavs_inter(h, mb_type);
910 189383 set_intra_mode_default(h);
911
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189383 if (mb_type != B_SKIP)
912 82054 decode_residual_inter(h);
913 189383 ff_cavs_filter(h, mb_type);
914
915 189383 return 0;
916 }
917
918 /*****************************************************************************
919 *
920 * slice level
921 *
922 ****************************************************************************/
923
924 static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
925 {
926 if (h->stc > 0xAF)
927 av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
928
929 if (h->stc >= h->mb_height) {
930 av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc);
931 return AVERROR_INVALIDDATA;
932 }
933
934 h->mby = h->stc;
935 h->mbidx = h->mby * h->mb_width;
936
937 /* mark top macroblocks as unavailable */
938 h->flags &= ~(B_AVAIL | C_AVAIL);
939 if (!h->pic_qp_fixed) {
940 h->qp_fixed = get_bits1(gb);
941 h->qp = get_bits(gb, 6);
942 }
943 /* inter frame or second slice can have weighting params */
944 if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
945 (!h->pic_structure && h->mby >= h->mb_width / 2))
946 if (get_bits1(gb)) { //slice_weighting_flag
947 av_log(h->avctx, AV_LOG_ERROR,
948 "weighted prediction not yet supported\n");
949 }
950 return 0;
951 }
952
953 297746 static inline int check_for_slice(AVSContext *h)
954 {
955 297746 GetBitContext *gb = &h->gb;
956 int align;
957
958
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297746 if (h->mbx)
959 291129 return 0;
960 6617 align = (-get_bits_count(gb)) & 7;
961 /* check for stuffing byte */
962
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6617 if (!align && (show_bits(gb, 8) == 0x80))
963 3 align = 8;
964
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6617 if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
965 skip_bits_long(gb, 24 + align);
966 h->stc = get_bits(gb, 8);
967 if (h->stc >= h->mb_height)
968 return 0;
969 decode_slice_header(h, gb);
970 return 1;
971 }
972 6617 return 0;
973 }
974
975 /*****************************************************************************
976 *
977 * frame level
978 *
979 ****************************************************************************/
980
981 184 static int decode_pic(AVSContext *h)
982 {
983 int ret;
984 184 int skip_count = -1;
985 enum cavs_mb mb_type;
986
987
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184 if (!h->top_qp) {
988 av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n");
989 return AVERROR_INVALIDDATA;
990 }
991
992 184 av_frame_unref(h->cur.f);
993
994 184 skip_bits(&h->gb, 16);//bbv_dwlay
995
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184 if (h->stc == PIC_PB_START_CODE) {
996 175 h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
997
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175 if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
998 av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
999 return AVERROR_INVALIDDATA;
1000 }
1001 /* make sure we have the reference frames we need */
1002
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175 if (!h->DPB[0].f->data[0] ||
1003
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175 (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
1004 return AVERROR_INVALIDDATA;
1005 } else {
1006 9 h->cur.f->pict_type = AV_PICTURE_TYPE_I;
1007
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9 if (get_bits1(&h->gb))
1008 skip_bits(&h->gb, 24);//time_code
1009 /* old sample clips were all progressive and no low_delay,
1010 bump stream revision if detected otherwise */
1011
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9 if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
1012 h->stream_revision = 1;
1013 /* similarly test top_field_first and repeat_first_field */
1014
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9 else if (show_bits(&h->gb, 11) & 3)
1015 h->stream_revision = 1;
1016
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9 if (h->stream_revision > 0)
1017 skip_bits(&h->gb, 1); //marker_bit
1018 }
1019
1020 184 ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
1021 0 : AV_GET_BUFFER_FLAG_REF);
1022
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184 if (ret < 0)
1023 return ret;
1024
1025
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184 if (!h->edge_emu_buffer) {
1026 4 int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
1027 4 h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
1028
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4 if (!h->edge_emu_buffer)
1029 return AVERROR(ENOMEM);
1030 }
1031
1032
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184 if ((ret = ff_cavs_init_pic(h)) < 0)
1033 return ret;
1034 184 h->cur.poc = get_bits(&h->gb, 8) * 2;
1035
1036 /* get temporal distances and MV scaling factors */
1037
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184 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1038 65 h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511;
1039 } else {
1040 119 h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511;
1041 }
1042 184 h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511;
1043
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184 h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
1044
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184 h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
1045
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184 if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
1046 119 h->sym_factor = h->dist[0] * h->scale_den[1];
1047
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119 if (FFABS(h->sym_factor) > 32768) {
1048 av_log(h->avctx, AV_LOG_ERROR, "sym_factor %d too large\n", h->sym_factor);
1049 return AVERROR_INVALIDDATA;
1050 }
1051 } else {
1052
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65 h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
1053
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65 h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
1054 }
1055
1056
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184 if (h->low_delay)
1057 get_ue_golomb(&h->gb); //bbv_check_times
1058 184 h->progressive = get_bits1(&h->gb);
1059 184 h->pic_structure = 1;
1060
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184 if (!h->progressive)
1061 h->pic_structure = get_bits1(&h->gb);
1062
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184 if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
1063 skip_bits1(&h->gb); //advanced_pred_mode_disable
1064 184 skip_bits1(&h->gb); //top_field_first
1065 184 skip_bits1(&h->gb); //repeat_first_field
1066 184 h->pic_qp_fixed =
1067 184 h->qp_fixed = get_bits1(&h->gb);
1068 184 h->qp = get_bits(&h->gb, 6);
1069
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184 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1070
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9 if (!h->progressive && !h->pic_structure)
1071 skip_bits1(&h->gb);//what is this?
1072 9 skip_bits(&h->gb, 4); //reserved bits
1073 } else {
1074
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175 if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
1075 56 h->ref_flag = get_bits1(&h->gb);
1076 175 skip_bits(&h->gb, 4); //reserved bits
1077 175 h->skip_mode_flag = get_bits1(&h->gb);
1078 }
1079 184 h->loop_filter_disable = get_bits1(&h->gb);
1080
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184 if (!h->loop_filter_disable && get_bits1(&h->gb)) {
1081 h->alpha_offset = get_se_golomb(&h->gb);
1082 h->beta_offset = get_se_golomb(&h->gb);
1083 if ( h->alpha_offset < -64 || h->alpha_offset > 64
1084 || h-> beta_offset < -64 || h-> beta_offset > 64) {
1085 h->alpha_offset = h->beta_offset = 0;
1086 return AVERROR_INVALIDDATA;
1087 }
1088 } else {
1089 184 h->alpha_offset = h->beta_offset = 0;
1090 }
1091
1092 184 ret = 0;
1093
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184 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1094 do {
1095 14580 check_for_slice(h);
1096 14580 ret = decode_mb_i(h, 0);
1097
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14580 if (ret < 0)
1098 break;
1099
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14580 } while (ff_cavs_next_mb(h));
1100
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175 } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
1101 do {
1102
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90720 if (check_for_slice(h))
1103 skip_count = -1;
1104
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90720 if (h->skip_mode_flag && (skip_count < 0)) {
1105
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69924 if (get_bits_left(&h->gb) < 1) {
1106 ret = AVERROR_INVALIDDATA;
1107 break;
1108 }
1109 69924 skip_count = get_ue_golomb(&h->gb);
1110 }
1111
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90720 if (h->skip_mode_flag && skip_count--) {
1112 20801 decode_mb_p(h, P_SKIP);
1113 } else {
1114
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69919 if (get_bits_left(&h->gb) < 1) {
1115 ret = AVERROR_INVALIDDATA;
1116 break;
1117 }
1118 69919 mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
1119
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69919 if (mb_type > P_8X8)
1120 7702 ret = decode_mb_i(h, mb_type - P_8X8 - 1);
1121 else
1122 62217 decode_mb_p(h, mb_type);
1123 }
1124
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90720 if (ret < 0)
1125 break;
1126
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90720 } while (ff_cavs_next_mb(h));
1127 } else { /* AV_PICTURE_TYPE_B */
1128 do {
1129
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192446 if (check_for_slice(h))
1130 skip_count = -1;
1131
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192446 if (h->skip_mode_flag && (skip_count < 0)) {
1132
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85154 if (get_bits_left(&h->gb) < 1) {
1133 1 ret = AVERROR_INVALIDDATA;
1134 1 break;
1135 }
1136 85153 skip_count = get_ue_golomb(&h->gb);
1137 }
1138
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192445 if (h->skip_mode_flag && skip_count--) {
1139 107329 ret = decode_mb_b(h, B_SKIP);
1140 } else {
1141
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85116 if (get_bits_left(&h->gb) < 1) {
1142 ret = AVERROR_INVALIDDATA;
1143 break;
1144 }
1145 85116 mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
1146
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85116 if (mb_type > B_8X8)
1147 3062 ret = decode_mb_i(h, mb_type - B_8X8 - 1);
1148 else
1149 82054 ret = decode_mb_b(h, mb_type);
1150 }
1151
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192445 if (ret < 0)
1152 break;
1153
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192445 } while (ff_cavs_next_mb(h));
1154 }
1155 184 emms_c();
1156
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184 if (ret >= 0 && h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1157 65 av_frame_unref(h->DPB[1].f);
1158 65 FFSWAP(AVSFrame, h->cur, h->DPB[1]);
1159 65 FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
1160 }
1161 184 return ret;
1162 }
1163
1164 /*****************************************************************************
1165 *
1166 * headers and interface
1167 *
1168 ****************************************************************************/
1169
1170 9 static int decode_seq_header(AVSContext *h)
1171 {
1172 int frame_rate_code;
1173 int width, height;
1174 int ret;
1175
1176 9 h->profile = get_bits(&h->gb, 8);
1177 9 h->level = get_bits(&h->gb, 8);
1178 9 skip_bits1(&h->gb); //progressive sequence
1179
1180 9 width = get_bits(&h->gb, 14);
1181 9 height = get_bits(&h->gb, 14);
1182
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9 if ((h->width || h->height) && (h->width != width || h->height != height)) {
1183 avpriv_report_missing_feature(h->avctx,
1184 "Width/height changing in CAVS");
1185 return AVERROR_PATCHWELCOME;
1186 }
1187
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9 if (width <= 0 || height <= 0) {
1188 av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
1189 return AVERROR_INVALIDDATA;
1190 }
1191 9 skip_bits(&h->gb, 2); //chroma format
1192 9 skip_bits(&h->gb, 3); //sample_precision
1193 9 h->aspect_ratio = get_bits(&h->gb, 4);
1194 9 frame_rate_code = get_bits(&h->gb, 4);
1195
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9 if (frame_rate_code == 0 || frame_rate_code > 13) {
1196 av_log(h->avctx, AV_LOG_WARNING,
1197 "frame_rate_code %d is invalid\n", frame_rate_code);
1198 frame_rate_code = 1;
1199 }
1200
1201 9 skip_bits(&h->gb, 18); //bit_rate_lower
1202 9 skip_bits1(&h->gb); //marker_bit
1203 9 skip_bits(&h->gb, 12); //bit_rate_upper
1204 9 h->low_delay = get_bits1(&h->gb);
1205
1206 9 ret = ff_set_dimensions(h->avctx, width, height);
1207
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9 if (ret < 0)
1208 return ret;
1209
1210 9 h->width = width;
1211 9 h->height = height;
1212 9 h->mb_width = (h->width + 15) >> 4;
1213 9 h->mb_height = (h->height + 15) >> 4;
1214 9 h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
1215
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9 if (!h->top_qp)
1216 4 return ff_cavs_init_top_lines(h);
1217 5 return 0;
1218 }
1219
1220 static void cavs_flush(AVCodecContext * avctx)
1221 {
1222 AVSContext *h = avctx->priv_data;
1223 h->got_keyframe = 0;
1224 }
1225
1226 187 static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1227 AVPacket *avpkt)
1228 {
1229 187 AVSContext *h = avctx->priv_data;
1230 187 const uint8_t *buf = avpkt->data;
1231 187 int buf_size = avpkt->size;
1232 187 uint32_t stc = -1;
1233 int input_size, ret;
1234 const uint8_t *buf_end;
1235 const uint8_t *buf_ptr;
1236 187 int frame_start = 0;
1237
1238
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187 if (buf_size == 0) {
1239
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3 if (!h->low_delay && h->DPB[0].f->data[0]) {
1240 2 *got_frame = 1;
1241 2 av_frame_move_ref(data, h->DPB[0].f);
1242 }
1243 3 return 0;
1244 }
1245
1246 184 h->stc = 0;
1247
1248 184 buf_ptr = buf;
1249 184 buf_end = buf + buf_size;
1250 for(;;) {
1251 385 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
1252
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385 if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) {
1253
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184 if (!h->stc)
1254 av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n");
1255 184 return FFMAX(0, buf_ptr - buf);
1256 }
1257 201 input_size = (buf_end - buf_ptr) * 8;
1258
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201 switch (stc) {
1259 9 case CAVS_START_CODE:
1260 9 init_get_bits(&h->gb, buf_ptr, input_size);
1261 9 decode_seq_header(h);
1262 9 break;
1263 9 case PIC_I_START_CODE:
1264
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9 if (!h->got_keyframe) {
1265 4 av_frame_unref(h->DPB[0].f);
1266 4 av_frame_unref(h->DPB[1].f);
1267 4 h->got_keyframe = 1;
1268 }
1269 case PIC_PB_START_CODE:
1270
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184 if (frame_start > 1)
1271 return AVERROR_INVALIDDATA;
1272 184 frame_start ++;
1273
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184 if (*got_frame)
1274 av_frame_unref(data);
1275 184 *got_frame = 0;
1276
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184 if (!h->got_keyframe)
1277 break;
1278 184 init_get_bits(&h->gb, buf_ptr, input_size);
1279 184 h->stc = stc;
1280
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184 if (decode_pic(h))
1281 1 break;
1282 183 *got_frame = 1;
1283
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183 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1284
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65 if (h->DPB[!h->low_delay].f->data[0]) {
1285
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61 if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0)
1286 return ret;
1287 } else {
1288 4 *got_frame = 0;
1289 }
1290 } else {
1291 118 av_frame_move_ref(data, h->cur.f);
1292 }
1293 183 break;
1294 4 case EXT_START_CODE:
1295 //mpeg_decode_extension(avctx, buf_ptr, input_size);
1296 4 break;
1297 4 case USER_START_CODE:
1298 //mpeg_decode_user_data(avctx, buf_ptr, input_size);
1299 4 break;
1300 default:
1301 if (stc <= SLICE_MAX_START_CODE) {
1302 init_get_bits(&h->gb, buf_ptr, input_size);
1303 decode_slice_header(h, &h->gb);
1304 }
1305 break;
1306 }
1307 }
1308 }
1309
1310 const AVCodec ff_cavs_decoder = {
1311 .name = "cavs",
1312 .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
1313 .type = AVMEDIA_TYPE_VIDEO,
1314 .id = AV_CODEC_ID_CAVS,
1315 .priv_data_size = sizeof(AVSContext),
1316 .init = ff_cavs_init,
1317 .close = ff_cavs_end,
1318 .decode = cavs_decode_frame,
1319 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1320 .flush = cavs_flush,
1321 };
1322