2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
25 * @author Stefan Gehrer <stefan.gehrer@gmx.de>
34 static const uint8_t mv_scan[4] = {
39 static const uint8_t cbp_tab[64][2] = {
40 { 63, 0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, { 0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 },
41 { 7, 14 }, { 5, 11 }, { 10, 12 }, { 8, 5 }, { 12, 10 }, { 61, 7 }, { 4, 48 }, { 55, 3 },
42 { 1, 2 }, { 2, 8 }, { 59, 4 }, { 3, 1 }, { 62, 61 }, { 9, 55 }, { 6, 59 }, { 29, 62 },
43 { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53, 9 }, { 30, 6 },
44 { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 },
45 { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 },
46 { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 },
47 { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 }
50 static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
52 static const uint8_t cavs_chroma_qp[64] = {
53 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
54 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
55 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 42, 43, 43, 44, 44,
56 45, 45, 46, 46, 47, 47, 48, 48, 48, 49, 49, 49, 50, 50, 50, 51
59 static const uint8_t dequant_shift[64] = {
60 14, 14, 14, 14, 14, 14, 14, 14,
61 13, 13, 13, 13, 13, 13, 13, 13,
62 13, 12, 12, 12, 12, 12, 12, 12,
63 11, 11, 11, 11, 11, 11, 11, 11,
64 11, 10, 10, 10, 10, 10, 10, 10,
65 10, 9, 9, 9, 9, 9, 9, 9,
66 9, 8, 8, 8, 8, 8, 8, 8,
67 7, 7, 7, 7, 7, 7, 7, 7
70 static const uint16_t dequant_mul[64] = {
71 32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
72 32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
73 65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
74 32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
75 65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
76 65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
77 65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
78 32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
83 static const struct dec_2dvlc intra_dec[7] = {
85 { //level / run / table_inc
86 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
87 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
88 { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
89 { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 },
90 { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
91 { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 },
92 { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 },
93 { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 },
94 { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 },
95 { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB }
98 { 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 },
105 { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 },
106 { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
107 { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 },
108 { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 },
109 { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 },
110 { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 },
111 { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 },
112 { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 },
113 { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 },
114 { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 }
117 { 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 },
124 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 },
125 { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
126 { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
127 { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
128 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 },
129 { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
130 { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 },
131 { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 },
132 { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 },
133 { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 }
136 { 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 },
143 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
144 { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 },
145 { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 },
146 { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
147 { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
148 { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 },
149 { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 },
150 { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 },
151 { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 },
152 { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 }
155 { 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 },
162 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 },
163 { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
164 { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 },
165 { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 },
166 {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 },
167 {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 },
168 {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 },
169 { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 },
170 {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 },
171 { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 }
174 { 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 },
181 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
182 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
183 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
184 { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 },
185 {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 },
186 { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 },
187 { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 },
188 {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 },
189 { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 },
190 { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }
193 { 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 },
200 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
201 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
202 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 },
203 { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 },
204 {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 },
205 {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 },
206 {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 },
207 {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 },
208 {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 },
209 {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 }
212 { 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 },
219 static const struct dec_2dvlc inter_dec[7] = {
222 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
223 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
224 { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 },
225 { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 },
226 { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 },
227 { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 },
228 { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 },
229 { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 },
230 { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
231 { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB }
234 { 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 },
241 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 },
242 { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
243 { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 },
244 { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 },
245 { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 },
246 { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 },
247 { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 },
248 { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 },
249 { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 },
250 { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 }
253 { 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 },
260 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 },
261 { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 },
262 { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 },
263 { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 },
264 { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 },
265 { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 },
266 { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 },
267 { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 },
268 { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 },
269 { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 }
272 { 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 },
279 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
280 { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 },
281 { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 },
282 { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 },
283 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 },
284 { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 },
285 { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 },
286 { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 },
287 { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 },
288 { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 }
291 { 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 },
298 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
299 { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 },
300 { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 },
301 { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 },
302 { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 },
303 { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 },
304 { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 },
305 {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 },
306 { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 },
307 { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 }
310 { 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 },
317 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
318 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 },
319 { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 },
320 { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 },
321 { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 },
322 { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 },
323 { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 },
324 { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 },
325 { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 },
326 { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 }
329 { 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 },
336 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
337 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
338 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 },
339 { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
340 { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 },
341 { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 },
342 { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 },
343 { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 },
344 { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 },
345 { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 }
348 { 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 },
355 static const struct dec_2dvlc chroma_dec[5] = {
358 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 },
359 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 },
360 { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 },
361 { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 },
362 { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 },
363 { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 },
364 { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 },
365 { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 },
366 { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 },
367 { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB }
370 { 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 },
377 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 },
378 { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 },
379 { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 },
380 { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 },
381 { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 },
382 { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 },
383 { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 },
384 { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 },
385 { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 },
386 { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 }
389 { 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 },
396 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 },
397 { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 },
398 { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 },
399 { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 },
400 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 },
401 { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 },
402 { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 },
403 { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 },
404 { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 },
405 { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 },
408 { 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 },
415 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
416 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 },
417 { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 },
418 { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 },
419 { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 },
420 { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 },
421 {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 },
422 { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 },
423 {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 },
424 {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 },
427 { 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 },
434 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 },
435 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 },
436 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 },
437 { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 },
438 { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 },
439 { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 },
440 { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 },
441 { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 },
442 { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 },
443 { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 },
446 { 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 },
455 /*****************************************************************************
457 * motion vector prediction
459 ****************************************************************************/
461 static inline void store_mvs(AVSContext *h)
463 h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0];
464 h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1];
465 h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2];
466 h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3];
469 static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
472 cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
473 int den = h->direct_den[col_mv->ref];
474 int m = col_mv->x >> 31;
476 pmv_fw->dist = h->dist[1];
477 pmv_bw->dist = h->dist[0];
480 /* scale the co-located motion vector according to its temporal span */
481 pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
482 pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
484 pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
485 pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
488 static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
489 enum cavs_block size)
491 cavs_vector *dst = src + MV_BWD_OFFS;
493 /* backward mv is the scaled and negated forward mv */
494 dst->x = -((src->x * h->sym_factor + 256) >> 9);
495 dst->y = -((src->y * h->sym_factor + 256) >> 9);
497 dst->dist = h->dist[0];
501 /*****************************************************************************
503 * residual data decoding
505 ****************************************************************************/
507 /** kth-order exponential golomb code */
508 static inline int get_ue_code(GetBitContext *gb, int order)
511 int ret = get_ue_golomb(gb) << order;
512 return ret + get_bits(gb, order);
514 return get_ue_golomb(gb);
517 static inline int dequant(AVSContext *h, DCTELEM *level_buf, uint8_t *run_buf,
518 DCTELEM *dst, int mul, int shift, int coeff_num)
520 int round = 1 << (shift - 1);
522 const uint8_t *scantab = h->scantable.permutated;
524 /* inverse scan and dequantization */
525 while (--coeff_num >= 0) {
526 pos += run_buf[coeff_num];
528 av_log(h->s.avctx, AV_LOG_ERROR,
529 "position out of block bounds at pic %d MB(%d,%d)\n",
530 h->picture.poc, h->mbx, h->mby);
533 dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift;
539 * decode coefficients from one 8x8 block, dequantize, inverse transform
540 * and add them to sample block
541 * @param r pointer to 2D VLC table
542 * @param esc_golomb_order escape codes are k-golomb with this order k
543 * @param qp quantizer
544 * @param dst location of sample block
545 * @param stride line stride in frame buffer
547 static int decode_residual_block(AVSContext *h, GetBitContext *gb,
548 const struct dec_2dvlc *r, int esc_golomb_order,
549 int qp, uint8_t *dst, int stride)
551 int i, level_code, esc_code, level, run, mask;
552 DCTELEM level_buf[65];
554 DCTELEM *block = h->block;
556 for (i = 0;i < 65; i++) {
557 level_code = get_ue_code(gb, r->golomb_order);
558 if (level_code >= ESCAPE_CODE) {
559 run = ((level_code - ESCAPE_CODE) >> 1) + 1;
560 esc_code = get_ue_code(gb, esc_golomb_order);
561 level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
562 while (level > r->inc_limit)
564 mask = -(level_code & 1);
565 level = (level ^ mask) - mask;
566 } else if (level_code >= 0) {
567 level = r->rltab[level_code][0];
568 if (!level) //end of block signal
570 run = r->rltab[level_code][1];
571 r += r->rltab[level_code][2];
575 level_buf[i] = level;
578 if (dequant(h, level_buf, run_buf, block, dequant_mul[qp],
579 dequant_shift[qp], i))
581 h->cdsp.cavs_idct8_add(dst, block, stride);
582 h->s.dsp.clear_block(block);
587 static inline void decode_residual_chroma(AVSContext *h)
589 if (h->cbp & (1 << 4))
590 decode_residual_block(h, &h->s.gb, chroma_dec, 0,
591 cavs_chroma_qp[h->qp], h->cu, h->c_stride);
592 if (h->cbp & (1 << 5))
593 decode_residual_block(h, &h->s.gb, chroma_dec, 0,
594 cavs_chroma_qp[h->qp], h->cv, h->c_stride);
597 static inline int decode_residual_inter(AVSContext *h)
601 /* get coded block pattern */
602 int cbp = get_ue_golomb(&h->s.gb);
604 av_log(h->s.avctx, AV_LOG_ERROR, "illegal inter cbp\n");
607 h->cbp = cbp_tab[cbp][1];
610 if (h->cbp && !h->qp_fixed)
611 h->qp = (h->qp + get_se_golomb(&h->s.gb)) & 63;
612 for (block = 0; block < 4; block++)
613 if (h->cbp & (1 << block))
614 decode_residual_block(h, &h->s.gb, inter_dec, 0, h->qp,
615 h->cy + h->luma_scan[block], h->l_stride);
616 decode_residual_chroma(h);
621 /*****************************************************************************
625 ****************************************************************************/
627 static inline void set_mv_intra(AVSContext *h)
629 h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
630 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
631 h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
632 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
633 if (h->pic_type != AV_PICTURE_TYPE_B)
634 h->col_type_base[h->mbidx] = I_8X8;
637 static int decode_mb_i(AVSContext *h, int cbp_code)
639 GetBitContext *gb = &h->s.gb;
640 unsigned pred_mode_uv;
643 uint8_t *left = NULL;
648 /* get intra prediction modes from stream */
649 for (block = 0; block < 4; block++) {
650 int nA, nB, predpred;
651 int pos = scan3x3[block];
653 nA = h->pred_mode_Y[pos - 1];
654 nB = h->pred_mode_Y[pos - 3];
655 predpred = FFMIN(nA, nB);
656 if (predpred == NOT_AVAIL) // if either is not available
657 predpred = INTRA_L_LP;
658 if (!get_bits1(gb)) {
659 int rem_mode = get_bits(gb, 2);
660 predpred = rem_mode + (rem_mode >= predpred);
662 h->pred_mode_Y[pos] = predpred;
664 pred_mode_uv = get_ue_golomb(gb);
665 if (pred_mode_uv > 6) {
666 av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
669 ff_cavs_modify_mb_i(h, &pred_mode_uv);
671 /* get coded block pattern */
672 if (h->pic_type == AV_PICTURE_TYPE_I)
673 cbp_code = get_ue_golomb(gb);
675 av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra cbp\n");
678 h->cbp = cbp_tab[cbp_code][0];
679 if (h->cbp && !h->qp_fixed)
680 h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
682 /* luma intra prediction interleaved with residual decode/transform/add */
683 for (block = 0; block < 4; block++) {
684 d = h->cy + h->luma_scan[block];
685 ff_cavs_load_intra_pred_luma(h, top, &left, block);
686 h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
687 (d, top, left, h->l_stride);
688 if (h->cbp & (1<<block))
689 decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
692 /* chroma intra prediction */
693 ff_cavs_load_intra_pred_chroma(h);
694 h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
695 h->left_border_u, h->c_stride);
696 h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
697 h->left_border_v, h->c_stride);
699 decode_residual_chroma(h);
700 ff_cavs_filter(h, I_8X8);
705 static inline void set_intra_mode_default(AVSContext *h)
707 if (h->stream_revision > 0) {
708 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
709 h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
711 h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
712 h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
716 static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
718 GetBitContext *gb = &h->s.gb;
724 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
727 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
728 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
731 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
732 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
733 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
734 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
737 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
738 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
739 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
740 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
743 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
744 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
745 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
746 ref[3] = h->ref_flag ? 0 : get_bits1(gb);
747 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
748 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
749 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
750 ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
752 ff_cavs_inter(h, mb_type);
753 set_intra_mode_default(h);
755 if (mb_type != P_SKIP)
756 decode_residual_inter(h);
757 ff_cavs_filter(h, mb_type);
758 h->col_type_base[h->mbidx] = mb_type;
761 static void decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
764 enum cavs_sub_mb sub_type[4];
770 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
771 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
772 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
773 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
777 if (!h->col_type_base[h->mbidx]) {
778 /* intra MB at co-location, do in-plane prediction */
779 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
780 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
782 /* direct prediction from co-located P MB, block-wise */
783 for (block = 0; block < 4; block++)
784 mv_pred_direct(h, &h->mv[mv_scan[block]],
785 &h->col_mv[h->mbidx * 4 + block]);
788 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
791 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
792 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
795 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
798 for (block = 0; block < 4; block++)
799 sub_type[block] = get_bits(&h->s.gb, 2);
800 for (block = 0; block < 4; block++) {
801 switch (sub_type[block]) {
803 if (!h->col_type_base[h->mbidx]) {
804 /* intra MB at co-location, do in-plane prediction */
805 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
806 MV_PRED_BSKIP, BLK_8X8, 1);
807 ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
808 mv_scan[block] - 3 + MV_BWD_OFFS,
809 MV_PRED_BSKIP, BLK_8X8, 0);
811 mv_pred_direct(h, &h->mv[mv_scan[block]],
812 &h->col_mv[h->mbidx * 4 + block]);
815 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
816 MV_PRED_MEDIAN, BLK_8X8, 1);
819 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
820 MV_PRED_MEDIAN, BLK_8X8, 1);
821 mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
825 for (block = 0; block < 4; block++) {
826 if (sub_type[block] == B_SUB_BWD)
827 ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
828 mv_scan[block] + MV_BWD_OFFS - 3,
829 MV_PRED_MEDIAN, BLK_8X8, 0);
833 assert((mb_type > B_SYM_16X16) && (mb_type < B_8X8));
834 flags = ff_cavs_partition_flags[mb_type];
835 if (mb_type & 1) { /* 16x8 macroblock types */
837 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
839 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
841 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
843 mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
845 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
847 ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
848 } else { /* 8x16 macroblock types */
850 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
852 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
854 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
856 mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
858 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
860 ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
863 ff_cavs_inter(h, mb_type);
864 set_intra_mode_default(h);
865 if (mb_type != B_SKIP)
866 decode_residual_inter(h);
867 ff_cavs_filter(h, mb_type);
870 /*****************************************************************************
874 ****************************************************************************/
876 static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
879 av_log(h->s.avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
881 h->mbidx = h->mby * h->mb_width;
883 /* mark top macroblocks as unavailable */
884 h->flags &= ~(B_AVAIL | C_AVAIL);
885 if ((h->mby == 0) && (!h->qp_fixed)) {
886 h->qp_fixed = get_bits1(gb);
887 h->qp = get_bits(gb, 6);
889 /* inter frame or second slice can have weighting params */
890 if ((h->pic_type != AV_PICTURE_TYPE_I) ||
891 (!h->pic_structure && h->mby >= h->mb_width / 2))
892 if (get_bits1(gb)) { //slice_weighting_flag
893 av_log(h->s.avctx, AV_LOG_ERROR,
894 "weighted prediction not yet supported\n");
899 static inline int check_for_slice(AVSContext *h)
901 GetBitContext *gb = &h->s.gb;
906 align = (-get_bits_count(gb)) & 7;
907 /* check for stuffing byte */
908 if (!align && (show_bits(gb, 8) == 0x80))
910 if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
911 skip_bits_long(gb, 24 + align);
912 h->stc = get_bits(gb, 8);
913 if (h->stc >= h->mb_height)
915 decode_slice_header(h, gb);
921 /*****************************************************************************
925 ****************************************************************************/
927 static int decode_pic(AVSContext *h)
929 MpegEncContext *s = &h->s;
931 enum cavs_mb mb_type;
933 if (!s->context_initialized) {
934 if (ff_MPV_common_init(s) < 0)
936 ff_init_scantable_permutation(s->dsp.idct_permutation,
938 ff_init_scantable(s->dsp.idct_permutation, &h->scantable, ff_zigzag_direct);
940 skip_bits(&s->gb, 16);//bbv_dwlay
941 if (h->stc == PIC_PB_START_CODE) {
942 h->pic_type = get_bits(&s->gb, 2) + AV_PICTURE_TYPE_I;
943 if (h->pic_type > AV_PICTURE_TYPE_B) {
944 av_log(s->avctx, AV_LOG_ERROR, "illegal picture type\n");
947 /* make sure we have the reference frames we need */
948 if (!h->DPB[0].f.data[0] ||
949 (!h->DPB[1].f.data[0] && h->pic_type == AV_PICTURE_TYPE_B))
952 h->pic_type = AV_PICTURE_TYPE_I;
953 if (get_bits1(&s->gb))
954 skip_bits(&s->gb, 24);//time_code
955 /* old sample clips were all progressive and no low_delay,
956 bump stream revision if detected otherwise */
957 if (s->low_delay || !(show_bits(&s->gb, 9) & 1))
958 h->stream_revision = 1;
959 /* similarly test top_field_first and repeat_first_field */
960 else if (show_bits(&s->gb, 11) & 3)
961 h->stream_revision = 1;
962 if (h->stream_revision > 0)
963 skip_bits(&s->gb, 1); //marker_bit
965 /* release last B frame */
966 if (h->picture.f.data[0])
967 s->avctx->release_buffer(s->avctx, &h->picture.f);
969 ff_get_buffer(s->avctx, &h->picture.f);
971 h->picture.poc = get_bits(&s->gb, 8) * 2;
973 /* get temporal distances and MV scaling factors */
974 if (h->pic_type != AV_PICTURE_TYPE_B) {
975 h->dist[0] = (h->picture.poc - h->DPB[0].poc + 512) % 512;
977 h->dist[0] = (h->DPB[0].poc - h->picture.poc + 512) % 512;
979 h->dist[1] = (h->picture.poc - h->DPB[1].poc + 512) % 512;
980 h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
981 h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
982 if (h->pic_type == AV_PICTURE_TYPE_B) {
983 h->sym_factor = h->dist[0] * h->scale_den[1];
985 h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
986 h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
990 get_ue_golomb(&s->gb); //bbv_check_times
991 h->progressive = get_bits1(&s->gb);
992 h->pic_structure = 1;
994 h->pic_structure = get_bits1(&s->gb);
995 if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
996 skip_bits1(&s->gb); //advanced_pred_mode_disable
997 skip_bits1(&s->gb); //top_field_first
998 skip_bits1(&s->gb); //repeat_first_field
999 h->qp_fixed = get_bits1(&s->gb);
1000 h->qp = get_bits(&s->gb, 6);
1001 if (h->pic_type == AV_PICTURE_TYPE_I) {
1002 if (!h->progressive && !h->pic_structure)
1003 skip_bits1(&s->gb);//what is this?
1004 skip_bits(&s->gb, 4); //reserved bits
1006 if (!(h->pic_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
1007 h->ref_flag = get_bits1(&s->gb);
1008 skip_bits(&s->gb, 4); //reserved bits
1009 h->skip_mode_flag = get_bits1(&s->gb);
1011 h->loop_filter_disable = get_bits1(&s->gb);
1012 if (!h->loop_filter_disable && get_bits1(&s->gb)) {
1013 h->alpha_offset = get_se_golomb(&s->gb);
1014 h->beta_offset = get_se_golomb(&s->gb);
1016 h->alpha_offset = h->beta_offset = 0;
1018 if (h->pic_type == AV_PICTURE_TYPE_I) {
1022 } while (ff_cavs_next_mb(h));
1023 } else if (h->pic_type == AV_PICTURE_TYPE_P) {
1025 if (check_for_slice(h))
1027 if (h->skip_mode_flag && (skip_count < 0))
1028 skip_count = get_ue_golomb(&s->gb);
1029 if (h->skip_mode_flag && skip_count--) {
1030 decode_mb_p(h, P_SKIP);
1032 mb_type = get_ue_golomb(&s->gb) + P_SKIP + h->skip_mode_flag;
1033 if (mb_type > P_8X8)
1034 decode_mb_i(h, mb_type - P_8X8 - 1);
1036 decode_mb_p(h, mb_type);
1038 } while (ff_cavs_next_mb(h));
1039 } else { /* AV_PICTURE_TYPE_B */
1041 if (check_for_slice(h))
1043 if (h->skip_mode_flag && (skip_count < 0))
1044 skip_count = get_ue_golomb(&s->gb);
1045 if (h->skip_mode_flag && skip_count--) {
1046 decode_mb_b(h, B_SKIP);
1048 mb_type = get_ue_golomb(&s->gb) + B_SKIP + h->skip_mode_flag;
1049 if (mb_type > B_8X8)
1050 decode_mb_i(h, mb_type - B_8X8 - 1);
1052 decode_mb_b(h, mb_type);
1054 } while (ff_cavs_next_mb(h));
1056 if (h->pic_type != AV_PICTURE_TYPE_B) {
1057 if (h->DPB[1].f.data[0])
1058 s->avctx->release_buffer(s->avctx, &h->DPB[1].f);
1059 h->DPB[1] = h->DPB[0];
1060 h->DPB[0] = h->picture;
1061 memset(&h->picture, 0, sizeof(Picture));
1066 /*****************************************************************************
1068 * headers and interface
1070 ****************************************************************************/
1072 static int decode_seq_header(AVSContext *h)
1074 MpegEncContext *s = &h->s;
1075 int frame_rate_code;
1078 h->profile = get_bits(&s->gb, 8);
1079 h->level = get_bits(&s->gb, 8);
1080 skip_bits1(&s->gb); //progressive sequence
1082 width = get_bits(&s->gb, 14);
1083 height = get_bits(&s->gb, 14);
1084 if ((s->width || s->height) && (s->width != width || s->height != height)) {
1085 av_log_missing_feature(s, "Width/height changing in CAVS", 0);
1086 return AVERROR_PATCHWELCOME;
1091 skip_bits(&s->gb, 2); //chroma format
1092 skip_bits(&s->gb, 3); //sample_precision
1093 h->aspect_ratio = get_bits(&s->gb, 4);
1094 frame_rate_code = get_bits(&s->gb, 4);
1095 skip_bits(&s->gb, 18); //bit_rate_lower
1096 skip_bits1(&s->gb); //marker_bit
1097 skip_bits(&s->gb, 12); //bit_rate_upper
1098 s->low_delay = get_bits1(&s->gb);
1099 h->mb_width = (s->width + 15) >> 4;
1100 h->mb_height = (s->height + 15) >> 4;
1101 h->s.avctx->time_base.den = ff_mpeg12_frame_rate_tab[frame_rate_code].num;
1102 h->s.avctx->time_base.num = ff_mpeg12_frame_rate_tab[frame_rate_code].den;
1103 h->s.avctx->width = s->width;
1104 h->s.avctx->height = s->height;
1106 ff_cavs_init_top_lines(h);
1110 static void cavs_flush(AVCodecContext * avctx)
1112 AVSContext *h = avctx->priv_data;
1113 h->got_keyframe = 0;
1116 static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1119 AVSContext *h = avctx->priv_data;
1120 MpegEncContext *s = &h->s;
1121 const uint8_t *buf = avpkt->data;
1122 int buf_size = avpkt->size;
1123 AVFrame *picture = data;
1126 const uint8_t *buf_end;
1127 const uint8_t *buf_ptr;
1131 if (buf_size == 0) {
1132 if (!s->low_delay && h->DPB[0].f.data[0]) {
1134 *picture = h->DPB[0].f;
1135 memset(&h->DPB[0], 0, sizeof(h->DPB[0]));
1141 buf_end = buf + buf_size;
1143 buf_ptr = avpriv_mpv_find_start_code(buf_ptr, buf_end, &stc);
1144 if ((stc & 0xFFFFFE00) || buf_ptr == buf_end)
1145 return FFMAX(0, buf_ptr - buf - s->parse_context.last_index);
1146 input_size = (buf_end - buf_ptr) * 8;
1148 case CAVS_START_CODE:
1149 init_get_bits(&s->gb, buf_ptr, input_size);
1150 decode_seq_header(h);
1152 case PIC_I_START_CODE:
1153 if (!h->got_keyframe) {
1154 if(h->DPB[0].f.data[0])
1155 avctx->release_buffer(avctx, &h->DPB[0].f);
1156 if(h->DPB[1].f.data[0])
1157 avctx->release_buffer(avctx, &h->DPB[1].f);
1158 h->got_keyframe = 1;
1160 case PIC_PB_START_CODE:
1162 if (!h->got_keyframe)
1164 init_get_bits(&s->gb, buf_ptr, input_size);
1169 if (h->pic_type != AV_PICTURE_TYPE_B) {
1170 if (h->DPB[1].f.data[0]) {
1171 *picture = h->DPB[1].f;
1176 *picture = h->picture.f;
1178 case EXT_START_CODE:
1179 //mpeg_decode_extension(avctx, buf_ptr, input_size);
1181 case USER_START_CODE:
1182 //mpeg_decode_user_data(avctx, buf_ptr, input_size);
1185 if (stc <= SLICE_MAX_START_CODE) {
1186 init_get_bits(&s->gb, buf_ptr, input_size);
1187 decode_slice_header(h, &s->gb);
1194 AVCodec ff_cavs_decoder = {
1196 .type = AVMEDIA_TYPE_VIDEO,
1197 .id = AV_CODEC_ID_CAVS,
1198 .priv_data_size = sizeof(AVSContext),
1199 .init = ff_cavs_init,
1200 .close = ff_cavs_end,
1201 .decode = cavs_decode_frame,
1202 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
1203 .flush = cavs_flush,
1204 .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),