5619071a1039dda0733f7aa82bf0755e0255198a
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,
99 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,
118 -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,
137 -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,
156 -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,
175 -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,
194 -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,
213 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
220 static const struct dec_2dvlc inter_dec
[7] = {
223 { 1, 1, 1},{ -1, 1, 1},{ 1, 2, 1},{ -1, 2, 1},{ 1, 3, 1},{ -1, 3, 1},
224 { 1, 4, 1},{ -1, 4, 1},{ 1, 5, 1},{ -1, 5, 1},{ 1, 6, 1},{ -1, 6, 1},
225 { 1, 7, 1},{ -1, 7, 1},{ 1, 8, 1},{ -1, 8, 1},{ 1, 9, 1},{ -1, 9, 1},
226 { 1,10, 1},{ -1,10, 1},{ 1,11, 1},{ -1,11, 1},{ 1,12, 1},{ -1,12, 1},
227 { 1,13, 1},{ -1,13, 1},{ 2, 1, 2},{ -2, 1, 2},{ 1,14, 1},{ -1,14, 1},
228 { 1,15, 1},{ -1,15, 1},{ 1,16, 1},{ -1,16, 1},{ 1,17, 1},{ -1,17, 1},
229 { 1,18, 1},{ -1,18, 1},{ 1,19, 1},{ -1,19, 1},{ 3, 1, 3},{ -3, 1, 3},
230 { 1,20, 1},{ -1,20, 1},{ 1,21, 1},{ -1,21, 1},{ 2, 2, 2},{ -2, 2, 2},
231 { 1,22, 1},{ -1,22, 1},{ 1,23, 1},{ -1,23, 1},{ 1,24, 1},{ -1,24, 1},
232 { 1,25, 1},{ -1,25, 1},{ 1,26, 1},{ -1,26, 1},{ EOB
}
235 { 0, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
236 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
242 { 1, 1, 0},{ -1, 1, 0},{ EOB
},{ 1, 2, 0},{ -1, 2, 0},{ 1, 3, 0},
243 { -1, 3, 0},{ 1, 4, 0},{ -1, 4, 0},{ 1, 5, 0},{ -1, 5, 0},{ 1, 6, 0},
244 { -1, 6, 0},{ 2, 1, 1},{ -2, 1, 1},{ 1, 7, 0},{ -1, 7, 0},{ 1, 8, 0},
245 { -1, 8, 0},{ 1, 9, 0},{ -1, 9, 0},{ 1,10, 0},{ -1,10, 0},{ 2, 2, 1},
246 { -2, 2, 1},{ 1,11, 0},{ -1,11, 0},{ 1,12, 0},{ -1,12, 0},{ 3, 1, 2},
247 { -3, 1, 2},{ 1,13, 0},{ -1,13, 0},{ 1,14, 0},{ -1,14, 0},{ 2, 3, 1},
248 { -2, 3, 1},{ 1,15, 0},{ -1,15, 0},{ 2, 4, 1},{ -2, 4, 1},{ 1,16, 0},
249 { -1,16, 0},{ 2, 5, 1},{ -2, 5, 1},{ 1,17, 0},{ -1,17, 0},{ 4, 1, 3},
250 { -4, 1, 3},{ 2, 6, 1},{ -2, 6, 1},{ 1,18, 0},{ -1,18, 0},{ 1,19, 0},
251 { -1,19, 0},{ 2, 7, 1},{ -2, 7, 1},{ 3, 2, 2},{ -3, 2, 2}
254 { 0, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2,
255 2, 2, 2,-1,-1,-1,-1,-1,-1,-1},
261 { 1, 1, 0},{ -1, 1, 0},{ EOB
},{ 1, 2, 0},{ -1, 2, 0},{ 2, 1, 0},
262 { -2, 1, 0},{ 1, 3, 0},{ -1, 3, 0},{ 1, 4, 0},{ -1, 4, 0},{ 3, 1, 1},
263 { -3, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 1, 6, 0},
264 { -1, 6, 0},{ 1, 7, 0},{ -1, 7, 0},{ 2, 3, 0},{ -2, 3, 0},{ 4, 1, 2},
265 { -4, 1, 2},{ 1, 8, 0},{ -1, 8, 0},{ 3, 2, 1},{ -3, 2, 1},{ 2, 4, 0},
266 { -2, 4, 0},{ 1, 9, 0},{ -1, 9, 0},{ 1,10, 0},{ -1,10, 0},{ 5, 1, 2},
267 { -5, 1, 2},{ 2, 5, 0},{ -2, 5, 0},{ 1,11, 0},{ -1,11, 0},{ 2, 6, 0},
268 { -2, 6, 0},{ 1,12, 0},{ -1,12, 0},{ 3, 3, 1},{ -3, 3, 1},{ 6, 1, 2},
269 { -6, 1, 2},{ 4, 2, 2},{ -4, 2, 2},{ 1,13, 0},{ -1,13, 0},{ 2, 7, 0},
270 { -2, 7, 0},{ 3, 4, 1},{ -3, 4, 1},{ 1,14, 0},{ -1,14, 0}
273 { 0, 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2,-1,-1,
274 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
280 { 1, 1, 0},{ -1, 1, 0},{ EOB
},{ 2, 1, 0},{ -2, 1, 0},{ 1, 2, 0},
281 { -1, 2, 0},{ 3, 1, 0},{ -3, 1, 0},{ 1, 3, 0},{ -1, 3, 0},{ 2, 2, 0},
282 { -2, 2, 0},{ 4, 1, 1},{ -4, 1, 1},{ 1, 4, 0},{ -1, 4, 0},{ 5, 1, 1},
283 { -5, 1, 1},{ 1, 5, 0},{ -1, 5, 0},{ 3, 2, 0},{ -3, 2, 0},{ 2, 3, 0},
284 { -2, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 6, 1, 1},{ -6, 1, 1},{ 2, 4, 0},
285 { -2, 4, 0},{ 1, 7, 0},{ -1, 7, 0},{ 4, 2, 1},{ -4, 2, 1},{ 7, 1, 2},
286 { -7, 1, 2},{ 3, 3, 0},{ -3, 3, 0},{ 1, 8, 0},{ -1, 8, 0},{ 2, 5, 0},
287 { -2, 5, 0},{ 8, 1, 2},{ -8, 1, 2},{ 1, 9, 0},{ -1, 9, 0},{ 3, 4, 0},
288 { -3, 4, 0},{ 2, 6, 0},{ -2, 6, 0},{ 5, 2, 1},{ -5, 2, 1},{ 1,10, 0},
289 { -1,10, 0},{ 9, 1, 2},{ -9, 1, 2},{ 4, 3, 1},{ -4, 3, 1}
292 { 0,10, 6, 5, 4, 3, 3, 2, 2, 2, 2,-1,-1,-1,-1,-1,-1,
293 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
299 { 1, 1, 0},{ -1, 1, 0},{ EOB
},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
300 { -3, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},
301 { -5, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 1, 3, 0},{ -1, 3, 0},{ 6, 1, 0},
302 { -6, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 7, 1, 1},{ -7, 1, 1},{ 1, 4, 0},
303 { -1, 4, 0},{ 8, 1, 1},{ -8, 1, 1},{ 2, 3, 0},{ -2, 3, 0},{ 4, 2, 0},
304 { -4, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 9, 1, 1},{ -9, 1, 1},{ 5, 2, 0},
305 { -5, 2, 0},{ 2, 4, 0},{ -2, 4, 0},{ 1, 6, 0},{ -1, 6, 0},{ 10, 1, 2},
306 {-10, 1, 2},{ 3, 3, 0},{ -3, 3, 0},{ 11, 1, 2},{-11, 1, 2},{ 1, 7, 0},
307 { -1, 7, 0},{ 6, 2, 0},{ -6, 2, 0},{ 3, 4, 0},{ -3, 4, 0},{ 2, 5, 0},
308 { -2, 5, 0},{ 12, 1, 2},{-12, 1, 2},{ 4, 3, 0},{ -4, 3, 0}
311 { 0,13, 7, 5, 4, 3, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,
312 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
318 { EOB
},{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
319 { -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 1, 2, 0},
320 { -1, 2, 0},{ 6, 1, 0},{ -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},
321 { -8, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 9, 1, 0},{ -9, 1, 0},{ 1, 3, 0},
322 { -1, 3, 0},{ 10, 1, 1},{-10, 1, 1},{ 3, 2, 0},{ -3, 2, 0},{ 11, 1, 1},
323 {-11, 1, 1},{ 4, 2, 0},{ -4, 2, 0},{ 12, 1, 1},{-12, 1, 1},{ 1, 4, 0},
324 { -1, 4, 0},{ 2, 3, 0},{ -2, 3, 0},{ 13, 1, 1},{-13, 1, 1},{ 5, 2, 0},
325 { -5, 2, 0},{ 14, 1, 1},{-14, 1, 1},{ 6, 2, 0},{ -6, 2, 0},{ 1, 5, 0},
326 { -1, 5, 0},{ 15, 1, 1},{-15, 1, 1},{ 3, 3, 0},{ -3, 3, 0},{ 16, 1, 1},
327 {-16, 1, 1},{ 2, 4, 0},{ -2, 4, 0},{ 7, 2, 0},{ -7, 2, 0}
330 { 0,17, 8, 4, 3, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
331 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
337 { EOB
},{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
338 { -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
339 { -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 8, 1, 0},
340 { -8, 1, 0},{ 9, 1, 0},{ -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 11, 1, 0},
341 {-11, 1, 0},{ 12, 1, 0},{-12, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 13, 1, 0},
342 {-13, 1, 0},{ 1, 3, 0},{ -1, 3, 0},{ 14, 1, 0},{-14, 1, 0},{ 15, 1, 0},
343 {-15, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 16, 1, 0},{-16, 1, 0},{ 17, 1, 0},
344 {-17, 1, 0},{ 18, 1, 0},{-18, 1, 0},{ 4, 2, 0},{ -4, 2, 0},{ 19, 1, 0},
345 {-19, 1, 0},{ 20, 1, 0},{-20, 1, 0},{ 2, 3, 0},{ -2, 3, 0},{ 1, 4, 0},
346 { -1, 4, 0},{ 5, 2, 0},{ -5, 2, 0},{ 21, 1, 0},{-21, 1, 0}
349 { 0,22, 6, 3, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
350 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
357 static const struct dec_2dvlc chroma_dec
[5] = {
360 { 1, 1, 1},{ -1, 1, 1},{ 1, 2, 1},{ -1, 2, 1},{ 1, 3, 1},{ -1, 3, 1},
361 { 1, 4, 1},{ -1, 4, 1},{ 1, 5, 1},{ -1, 5, 1},{ 1, 6, 1},{ -1, 6, 1},
362 { 1, 7, 1},{ -1, 7, 1},{ 2, 1, 2},{ -2, 1, 2},{ 1, 8, 1},{ -1, 8, 1},
363 { 1, 9, 1},{ -1, 9, 1},{ 1,10, 1},{ -1,10, 1},{ 1,11, 1},{ -1,11, 1},
364 { 1,12, 1},{ -1,12, 1},{ 1,13, 1},{ -1,13, 1},{ 1,14, 1},{ -1,14, 1},
365 { 1,15, 1},{ -1,15, 1},{ 3, 1, 3},{ -3, 1, 3},{ 1,16, 1},{ -1,16, 1},
366 { 1,17, 1},{ -1,17, 1},{ 1,18, 1},{ -1,18, 1},{ 1,19, 1},{ -1,19, 1},
367 { 1,20, 1},{ -1,20, 1},{ 1,21, 1},{ -1,21, 1},{ 1,22, 1},{ -1,22, 1},
368 { 2, 2, 2},{ -2, 2, 2},{ 1,23, 1},{ -1,23, 1},{ 1,24, 1},{ -1,24, 1},
369 { 1,25, 1},{ -1,25, 1},{ 4, 1, 3},{ -4, 1, 3},{ EOB
}
372 { 0, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
373 2, 2, 2, 2, 2, 2, 2, 2, 2,-1},
379 { EOB
},{ 1, 1, 0},{ -1, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 2, 1, 1},
380 { -2, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 1, 4, 0},{ -1, 4, 0},{ 1, 5, 0},
381 { -1, 5, 0},{ 1, 6, 0},{ -1, 6, 0},{ 3, 1, 2},{ -3, 1, 2},{ 1, 7, 0},
382 { -1, 7, 0},{ 1, 8, 0},{ -1, 8, 0},{ 2, 2, 1},{ -2, 2, 1},{ 1, 9, 0},
383 { -1, 9, 0},{ 1,10, 0},{ -1,10, 0},{ 1,11, 0},{ -1,11, 0},{ 4, 1, 2},
384 { -4, 1, 2},{ 1,12, 0},{ -1,12, 0},{ 1,13, 0},{ -1,13, 0},{ 1,14, 0},
385 { -1,14, 0},{ 2, 3, 1},{ -2, 3, 1},{ 1,15, 0},{ -1,15, 0},{ 2, 4, 1},
386 { -2, 4, 1},{ 5, 1, 3},{ -5, 1, 3},{ 3, 2, 2},{ -3, 2, 2},{ 1,16, 0},
387 { -1,16, 0},{ 1,17, 0},{ -1,17, 0},{ 1,18, 0},{ -1,18, 0},{ 2, 5, 1},
388 { -2, 5, 1},{ 1,19, 0},{ -1,19, 0},{ 1,20, 0},{ -1,20, 0}
391 { 0, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
392 2, 2, 2, 2,-1,-1,-1,-1,-1,-1},
398 { 1, 1, 0},{ -1, 1, 0},{ EOB
},{ 2, 1, 0},{ -2, 1, 0},{ 1, 2, 0},
399 { -1, 2, 0},{ 3, 1, 1},{ -3, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 4, 1, 1},
400 { -4, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 1, 4, 0},{ -1, 4, 0},{ 5, 1, 2},
401 { -5, 1, 2},{ 1, 5, 0},{ -1, 5, 0},{ 3, 2, 1},{ -3, 2, 1},{ 2, 3, 0},
402 { -2, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 6, 1, 2},{ -6, 1, 2},{ 1, 7, 0},
403 { -1, 7, 0},{ 2, 4, 0},{ -2, 4, 0},{ 7, 1, 2},{ -7, 1, 2},{ 1, 8, 0},
404 { -1, 8, 0},{ 4, 2, 1},{ -4, 2, 1},{ 1, 9, 0},{ -1, 9, 0},{ 3, 3, 1},
405 { -3, 3, 1},{ 2, 5, 0},{ -2, 5, 0},{ 2, 6, 0},{ -2, 6, 0},{ 8, 1, 2},
406 { -8, 1, 2},{ 1,10, 0},{ -1,10, 0},{ 1,11, 0},{ -1,11, 0},{ 9, 1, 2},
407 { -9, 1, 2},{ 5, 2, 2},{ -5, 2, 2},{ 3, 4, 1},{ -3, 4, 1},
410 { 0,10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2,-1,-1,-1,-1,-1,
411 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
417 { EOB
},{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
418 { -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 5, 1, 1},
419 { -5, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 6, 1, 1},{ -6, 1, 1},{ 1, 3, 0},
420 { -1, 3, 0},{ 7, 1, 1},{ -7, 1, 1},{ 3, 2, 0},{ -3, 2, 0},{ 8, 1, 1},
421 { -8, 1, 1},{ 1, 4, 0},{ -1, 4, 0},{ 2, 3, 0},{ -2, 3, 0},{ 9, 1, 1},
422 { -9, 1, 1},{ 4, 2, 0},{ -4, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 10, 1, 1},
423 {-10, 1, 1},{ 3, 3, 0},{ -3, 3, 0},{ 5, 2, 1},{ -5, 2, 1},{ 2, 4, 0},
424 { -2, 4, 0},{ 11, 1, 1},{-11, 1, 1},{ 1, 6, 0},{ -1, 6, 0},{ 12, 1, 1},
425 {-12, 1, 1},{ 1, 7, 0},{ -1, 7, 0},{ 6, 2, 1},{ -6, 2, 1},{ 13, 1, 1},
426 {-13, 1, 1},{ 2, 5, 0},{ -2, 5, 0},{ 1, 8, 0},{ -1, 8, 0},
429 { 0,14, 7, 4, 3, 3, 2, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,
430 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
436 { EOB
},{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
437 { -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
438 { -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},{ -8, 1, 0},{ 1, 2, 0},
439 { -1, 2, 0},{ 9, 1, 0},{ -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 11, 1, 0},
440 {-11, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 12, 1, 0},{-12, 1, 0},{ 13, 1, 0},
441 {-13, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 14, 1, 0},{-14, 1, 0},{ 1, 3, 0},
442 { -1, 3, 0},{ 15, 1, 0},{-15, 1, 0},{ 4, 2, 0},{ -4, 2, 0},{ 16, 1, 0},
443 {-16, 1, 0},{ 17, 1, 0},{-17, 1, 0},{ 5, 2, 0},{ -5, 2, 0},{ 1, 4, 0},
444 { -1, 4, 0},{ 2, 3, 0},{ -2, 3, 0},{ 18, 1, 0},{-18, 1, 0},{ 6, 2, 0},
445 { -6, 2, 0},{ 19, 1, 0},{-19, 1, 0},{ 1, 5, 0},{ -1, 5, 0},
448 { 0,20, 7, 3, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
449 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
458 /*****************************************************************************
460 * motion vector prediction
462 ****************************************************************************/
464 static inline void store_mvs(AVSContext
*h
) {
465 h
->col_mv
[h
->mbidx
*4 + 0] = h
->mv
[MV_FWD_X0
];
466 h
->col_mv
[h
->mbidx
*4 + 1] = h
->mv
[MV_FWD_X1
];
467 h
->col_mv
[h
->mbidx
*4 + 2] = h
->mv
[MV_FWD_X2
];
468 h
->col_mv
[h
->mbidx
*4 + 3] = h
->mv
[MV_FWD_X3
];
471 static inline void mv_pred_direct(AVSContext
*h
, cavs_vector
*pmv_fw
,
472 cavs_vector
*col_mv
) {
473 cavs_vector
*pmv_bw
= pmv_fw
+ MV_BWD_OFFS
;
474 int den
= h
->direct_den
[col_mv
->ref
];
475 int m
= col_mv
->x
>> 31;
477 pmv_fw
->dist
= h
->dist
[1];
478 pmv_bw
->dist
= h
->dist
[0];
481 /* scale the co-located motion vector according to its temporal span */
482 pmv_fw
->x
= (((den
+(den
*col_mv
->x
*pmv_fw
->dist
^m
)-m
-1)>>14)^m
)-m
;
483 pmv_bw
->x
= m
-(((den
+(den
*col_mv
->x
*pmv_bw
->dist
^m
)-m
-1)>>14)^m
);
485 pmv_fw
->y
= (((den
+(den
*col_mv
->y
*pmv_fw
->dist
^m
)-m
-1)>>14)^m
)-m
;
486 pmv_bw
->y
= m
-(((den
+(den
*col_mv
->y
*pmv_bw
->dist
^m
)-m
-1)>>14)^m
);
489 static inline void mv_pred_sym(AVSContext
*h
, cavs_vector
*src
, enum cavs_block size
) {
490 cavs_vector
*dst
= src
+ MV_BWD_OFFS
;
492 /* backward mv is the scaled and negated forward mv */
493 dst
->x
= -((src
->x
* h
->sym_factor
+ 256) >> 9);
494 dst
->y
= -((src
->y
* h
->sym_factor
+ 256) >> 9);
496 dst
->dist
= h
->dist
[0];
500 /*****************************************************************************
502 * residual data decoding
504 ****************************************************************************/
506 /** kth-order exponential golomb code */
507 static inline int get_ue_code(GetBitContext
*gb
, int order
) {
509 int ret
= get_ue_golomb(gb
) << order
;
510 return ret
+ get_bits(gb
,order
);
512 return get_ue_golomb(gb
);
515 static inline int dequant(AVSContext
*h
, DCTELEM
*level_buf
, uint8_t *run_buf
,
516 DCTELEM
*dst
, int mul
, int shift
, int coeff_num
) {
517 int round
= 1 << (shift
- 1);
519 const uint8_t *scantab
= h
->scantable
.permutated
;
521 /* inverse scan and dequantization */
522 while(--coeff_num
>= 0){
523 pos
+= run_buf
[coeff_num
];
525 av_log(h
->s
.avctx
, AV_LOG_ERROR
,
526 "position out of block bounds at pic %d MB(%d,%d)\n",
527 h
->picture
.poc
, h
->mbx
, h
->mby
);
530 dst
[scantab
[pos
]] = (level_buf
[coeff_num
]*mul
+ round
) >> shift
;
536 * decode coefficients from one 8x8 block, dequantize, inverse transform
537 * and add them to sample block
538 * @param r pointer to 2D VLC table
539 * @param esc_golomb_order escape codes are k-golomb with this order k
540 * @param qp quantizer
541 * @param dst location of sample block
542 * @param stride line stride in frame buffer
544 static int decode_residual_block(AVSContext
*h
, GetBitContext
*gb
,
545 const struct dec_2dvlc
*r
, int esc_golomb_order
,
546 int qp
, uint8_t *dst
, int stride
) {
547 int i
, level_code
, esc_code
, level
, run
, mask
;
548 DCTELEM level_buf
[65];
550 DCTELEM
*block
= h
->block
;
553 level_code
= get_ue_code(gb
,r
->golomb_order
);
554 if(level_code
>= ESCAPE_CODE
) {
555 run
= ((level_code
- ESCAPE_CODE
) >> 1) + 1;
556 esc_code
= get_ue_code(gb
,esc_golomb_order
);
557 level
= esc_code
+ (run
> r
->max_run ?
1 : r
->level_add
[run
]);
558 while(level
> r
->inc_limit
)
560 mask
= -(level_code
& 1);
561 level
= (level
^mask
) - mask
;
562 } else if (level_code
>= 0) {
563 level
= r
->rltab
[level_code
][0];
564 if(!level
) //end of block signal
566 run
= r
->rltab
[level_code
][1];
567 r
+= r
->rltab
[level_code
][2];
571 level_buf
[i
] = level
;
574 if (dequant(h
, level_buf
, run_buf
, block
, dequant_mul
[qp
],
575 dequant_shift
[qp
], i
))
577 h
->cdsp
.cavs_idct8_add(dst
,block
,stride
);
578 h
->s
.dsp
.clear_block(block
);
583 static inline void decode_residual_chroma(AVSContext
*h
) {
585 decode_residual_block(h
, &h
->s
.gb
, chroma_dec
, 0,
586 cavs_chroma_qp
[h
->qp
], h
->cu
, h
->c_stride
);
588 decode_residual_block(h
, &h
->s
.gb
, chroma_dec
, 0,
589 cavs_chroma_qp
[h
->qp
], h
->cv
, h
->c_stride
);
592 static inline int decode_residual_inter(AVSContext
*h
) {
595 /* get coded block pattern */
596 int cbp
= get_ue_golomb(&h
->s
.gb
);
598 av_log(h
->s
.avctx
, AV_LOG_ERROR
, "illegal inter cbp\n");
601 h
->cbp
= cbp_tab
[cbp
][1];
604 if(h
->cbp
&& !h
->qp_fixed
)
605 h
->qp
= (h
->qp
+ get_se_golomb(&h
->s
.gb
)) & 63;
606 for(block
=0;block
<4;block
++)
607 if(h
->cbp
& (1<<block
))
608 decode_residual_block(h
, &h
->s
.gb
, inter_dec
, 0, h
->qp
,
609 h
->cy
+ h
->luma_scan
[block
], h
->l_stride
);
610 decode_residual_chroma(h
);
615 /*****************************************************************************
619 ****************************************************************************/
621 static inline void set_mv_intra(AVSContext
*h
) {
622 h
->mv
[MV_FWD_X0
] = ff_cavs_intra_mv
;
623 set_mvs(&h
->mv
[MV_FWD_X0
], BLK_16X16
);
624 h
->mv
[MV_BWD_X0
] = ff_cavs_intra_mv
;
625 set_mvs(&h
->mv
[MV_BWD_X0
], BLK_16X16
);
626 if(h
->pic_type
!= AV_PICTURE_TYPE_B
)
627 h
->col_type_base
[h
->mbidx
] = I_8X8
;
630 static int decode_mb_i(AVSContext
*h
, int cbp_code
) {
631 GetBitContext
*gb
= &h
->s
.gb
;
632 unsigned pred_mode_uv
;
635 uint8_t *left
= NULL
;
640 /* get intra prediction modes from stream */
641 for(block
=0;block
<4;block
++) {
643 int pos
= scan3x3
[block
];
645 nA
= h
->pred_mode_Y
[pos
-1];
646 nB
= h
->pred_mode_Y
[pos
-3];
647 predpred
= FFMIN(nA
,nB
);
648 if(predpred
== NOT_AVAIL
) // if either is not available
649 predpred
= INTRA_L_LP
;
651 int rem_mode
= get_bits(gb
, 2);
652 predpred
= rem_mode
+ (rem_mode
>= predpred
);
654 h
->pred_mode_Y
[pos
] = predpred
;
656 pred_mode_uv
= get_ue_golomb(gb
);
657 if(pred_mode_uv
> 6) {
658 av_log(h
->s
.avctx
, AV_LOG_ERROR
, "illegal intra chroma pred mode\n");
661 ff_cavs_modify_mb_i(h
, &pred_mode_uv
);
663 /* get coded block pattern */
664 if(h
->pic_type
== AV_PICTURE_TYPE_I
)
665 cbp_code
= get_ue_golomb(gb
);
667 av_log(h
->s
.avctx
, AV_LOG_ERROR
, "illegal intra cbp\n");
670 h
->cbp
= cbp_tab
[cbp_code
][0];
671 if(h
->cbp
&& !h
->qp_fixed
)
672 h
->qp
= (h
->qp
+ get_se_golomb(gb
)) & 63; //qp_delta
674 /* luma intra prediction interleaved with residual decode/transform/add */
675 for(block
=0;block
<4;block
++) {
676 d
= h
->cy
+ h
->luma_scan
[block
];
677 ff_cavs_load_intra_pred_luma(h
, top
, &left
, block
);
678 h
->intra_pred_l
[h
->pred_mode_Y
[scan3x3
[block
]]]
679 (d
, top
, left
, h
->l_stride
);
680 if(h
->cbp
& (1<<block
))
681 decode_residual_block(h
, gb
, intra_dec
, 1, h
->qp
, d
, h
->l_stride
);
684 /* chroma intra prediction */
685 ff_cavs_load_intra_pred_chroma(h
);
686 h
->intra_pred_c
[pred_mode_uv
](h
->cu
, &h
->top_border_u
[h
->mbx
*10],
687 h
->left_border_u
, h
->c_stride
);
688 h
->intra_pred_c
[pred_mode_uv
](h
->cv
, &h
->top_border_v
[h
->mbx
*10],
689 h
->left_border_v
, h
->c_stride
);
691 decode_residual_chroma(h
);
692 ff_cavs_filter(h
,I_8X8
);
697 static inline void set_intra_mode_default(AVSContext
*h
) {
698 if(h
->stream_revision
> 0) {
699 h
->pred_mode_Y
[3] = h
->pred_mode_Y
[6] = NOT_AVAIL
;
700 h
->top_pred_Y
[h
->mbx
*2+0] = h
->top_pred_Y
[h
->mbx
*2+1] = NOT_AVAIL
;
702 h
->pred_mode_Y
[3] = h
->pred_mode_Y
[6] = INTRA_L_LP
;
703 h
->top_pred_Y
[h
->mbx
*2+0] = h
->top_pred_Y
[h
->mbx
*2+1] = INTRA_L_LP
;
707 static void decode_mb_p(AVSContext
*h
, enum cavs_mb mb_type
) {
708 GetBitContext
*gb
= &h
->s
.gb
;
714 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_C2
, MV_PRED_PSKIP
, BLK_16X16
, 0);
717 ref
[0] = h
->ref_flag ?
0 : get_bits1(gb
);
718 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_C2
, MV_PRED_MEDIAN
, BLK_16X16
,ref
[0]);
721 ref
[0] = h
->ref_flag ?
0 : get_bits1(gb
);
722 ref
[2] = h
->ref_flag ?
0 : get_bits1(gb
);
723 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_C2
, MV_PRED_TOP
, BLK_16X8
, ref
[0]);
724 ff_cavs_mv(h
, MV_FWD_X2
, MV_FWD_A1
, MV_PRED_LEFT
, BLK_16X8
, ref
[2]);
727 ref
[0] = h
->ref_flag ?
0 : get_bits1(gb
);
728 ref
[1] = h
->ref_flag ?
0 : get_bits1(gb
);
729 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_B3
, MV_PRED_LEFT
, BLK_8X16
, ref
[0]);
730 ff_cavs_mv(h
, MV_FWD_X1
, MV_FWD_C2
, MV_PRED_TOPRIGHT
,BLK_8X16
, ref
[1]);
733 ref
[0] = h
->ref_flag ?
0 : get_bits1(gb
);
734 ref
[1] = h
->ref_flag ?
0 : get_bits1(gb
);
735 ref
[2] = h
->ref_flag ?
0 : get_bits1(gb
);
736 ref
[3] = h
->ref_flag ?
0 : get_bits1(gb
);
737 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_B3
, MV_PRED_MEDIAN
, BLK_8X8
, ref
[0]);
738 ff_cavs_mv(h
, MV_FWD_X1
, MV_FWD_C2
, MV_PRED_MEDIAN
, BLK_8X8
, ref
[1]);
739 ff_cavs_mv(h
, MV_FWD_X2
, MV_FWD_X1
, MV_PRED_MEDIAN
, BLK_8X8
, ref
[2]);
740 ff_cavs_mv(h
, MV_FWD_X3
, MV_FWD_X0
, MV_PRED_MEDIAN
, BLK_8X8
, ref
[3]);
742 ff_cavs_inter(h
, mb_type
);
743 set_intra_mode_default(h
);
745 if(mb_type
!= P_SKIP
)
746 decode_residual_inter(h
);
747 ff_cavs_filter(h
,mb_type
);
748 h
->col_type_base
[h
->mbidx
] = mb_type
;
751 static void decode_mb_b(AVSContext
*h
, enum cavs_mb mb_type
) {
753 enum cavs_sub_mb sub_type
[4];
759 h
->mv
[MV_FWD_X0
] = ff_cavs_dir_mv
;
760 set_mvs(&h
->mv
[MV_FWD_X0
], BLK_16X16
);
761 h
->mv
[MV_BWD_X0
] = ff_cavs_dir_mv
;
762 set_mvs(&h
->mv
[MV_BWD_X0
], BLK_16X16
);
766 if(!h
->col_type_base
[h
->mbidx
]) {
767 /* intra MB at co-location, do in-plane prediction */
768 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_C2
, MV_PRED_BSKIP
, BLK_16X16
, 1);
769 ff_cavs_mv(h
, MV_BWD_X0
, MV_BWD_C2
, MV_PRED_BSKIP
, BLK_16X16
, 0);
771 /* direct prediction from co-located P MB, block-wise */
772 for(block
=0;block
<4;block
++)
773 mv_pred_direct(h
,&h
->mv
[mv_scan
[block
]],
774 &h
->col_mv
[h
->mbidx
*4 + block
]);
777 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_C2
, MV_PRED_MEDIAN
, BLK_16X16
, 1);
780 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_C2
, MV_PRED_MEDIAN
, BLK_16X16
, 1);
781 mv_pred_sym(h
, &h
->mv
[MV_FWD_X0
], BLK_16X16
);
784 ff_cavs_mv(h
, MV_BWD_X0
, MV_BWD_C2
, MV_PRED_MEDIAN
, BLK_16X16
, 0);
787 for(block
=0;block
<4;block
++)
788 sub_type
[block
] = get_bits(&h
->s
.gb
,2);
789 for(block
=0;block
<4;block
++) {
790 switch(sub_type
[block
]) {
792 if(!h
->col_type_base
[h
->mbidx
]) {
793 /* intra MB at co-location, do in-plane prediction */
794 ff_cavs_mv(h
, mv_scan
[block
], mv_scan
[block
]-3,
795 MV_PRED_BSKIP
, BLK_8X8
, 1);
796 ff_cavs_mv(h
, mv_scan
[block
]+MV_BWD_OFFS
,
797 mv_scan
[block
]-3+MV_BWD_OFFS
,
798 MV_PRED_BSKIP
, BLK_8X8
, 0);
800 mv_pred_direct(h
,&h
->mv
[mv_scan
[block
]],
801 &h
->col_mv
[h
->mbidx
*4 + block
]);
804 ff_cavs_mv(h
, mv_scan
[block
], mv_scan
[block
]-3,
805 MV_PRED_MEDIAN
, BLK_8X8
, 1);
808 ff_cavs_mv(h
, mv_scan
[block
], mv_scan
[block
]-3,
809 MV_PRED_MEDIAN
, BLK_8X8
, 1);
810 mv_pred_sym(h
, &h
->mv
[mv_scan
[block
]], BLK_8X8
);
814 for(block
=0;block
<4;block
++) {
815 if(sub_type
[block
] == B_SUB_BWD
)
816 ff_cavs_mv(h
, mv_scan
[block
]+MV_BWD_OFFS
,
817 mv_scan
[block
]+MV_BWD_OFFS
-3,
818 MV_PRED_MEDIAN
, BLK_8X8
, 0);
822 assert((mb_type
> B_SYM_16X16
) && (mb_type
< B_8X8
));
823 flags
= ff_cavs_partition_flags
[mb_type
];
824 if(mb_type
& 1) { /* 16x8 macroblock types */
826 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_C2
, MV_PRED_TOP
, BLK_16X8
, 1);
828 mv_pred_sym(h
, &h
->mv
[MV_FWD_X0
], BLK_16X8
);
830 ff_cavs_mv(h
, MV_FWD_X2
, MV_FWD_A1
, MV_PRED_LEFT
, BLK_16X8
, 1);
832 mv_pred_sym(h
, &h
->mv
[MV_FWD_X2
], BLK_16X8
);
834 ff_cavs_mv(h
, MV_BWD_X0
, MV_BWD_C2
, MV_PRED_TOP
, BLK_16X8
, 0);
836 ff_cavs_mv(h
, MV_BWD_X2
, MV_BWD_A1
, MV_PRED_LEFT
, BLK_16X8
, 0);
837 } else { /* 8x16 macroblock types */
839 ff_cavs_mv(h
, MV_FWD_X0
, MV_FWD_B3
, MV_PRED_LEFT
, BLK_8X16
, 1);
841 mv_pred_sym(h
, &h
->mv
[MV_FWD_X0
], BLK_8X16
);
843 ff_cavs_mv(h
,MV_FWD_X1
,MV_FWD_C2
,MV_PRED_TOPRIGHT
,BLK_8X16
,1);
845 mv_pred_sym(h
, &h
->mv
[MV_FWD_X1
], BLK_8X16
);
847 ff_cavs_mv(h
, MV_BWD_X0
, MV_BWD_B3
, MV_PRED_LEFT
, BLK_8X16
, 0);
849 ff_cavs_mv(h
,MV_BWD_X1
,MV_BWD_C2
,MV_PRED_TOPRIGHT
,BLK_8X16
,0);
852 ff_cavs_inter(h
, mb_type
);
853 set_intra_mode_default(h
);
854 if(mb_type
!= B_SKIP
)
855 decode_residual_inter(h
);
856 ff_cavs_filter(h
,mb_type
);
859 /*****************************************************************************
863 ****************************************************************************/
865 static inline int decode_slice_header(AVSContext
*h
, GetBitContext
*gb
) {
867 av_log(h
->s
.avctx
, AV_LOG_ERROR
, "unexpected start code 0x%02x\n", h
->stc
);
869 h
->mbidx
= h
->mby
*h
->mb_width
;
871 /* mark top macroblocks as unavailable */
872 h
->flags
&= ~(B_AVAIL
|C_AVAIL
);
873 if((h
->mby
== 0) && (!h
->qp_fixed
)){
874 h
->qp_fixed
= get_bits1(gb
);
875 h
->qp
= get_bits(gb
,6);
877 /* inter frame or second slice can have weighting params */
878 if((h
->pic_type
!= AV_PICTURE_TYPE_I
) || (!h
->pic_structure
&& h
->mby
>= h
->mb_width
/2))
879 if(get_bits1(gb
)) { //slice_weighting_flag
880 av_log(h
->s
.avctx
, AV_LOG_ERROR
,
881 "weighted prediction not yet supported\n");
886 static inline int check_for_slice(AVSContext
*h
) {
887 GetBitContext
*gb
= &h
->s
.gb
;
892 align
= (-get_bits_count(gb
)) & 7;
893 /* check for stuffing byte */
894 if(!align
&& (show_bits(gb
,8) == 0x80))
896 if((show_bits_long(gb
,24+align
) & 0xFFFFFF) == 0x000001) {
897 skip_bits_long(gb
,24+align
);
898 h
->stc
= get_bits(gb
,8);
899 if (h
->stc
>= h
->mb_height
)
901 decode_slice_header(h
,gb
);
907 /*****************************************************************************
911 ****************************************************************************/
913 static int decode_pic(AVSContext
*h
) {
914 MpegEncContext
*s
= &h
->s
;
916 enum cavs_mb mb_type
;
918 if (!s
->context_initialized
) {
919 if (ff_MPV_common_init(s
) < 0)
921 ff_init_scantable_permutation(s
->dsp
.idct_permutation
,
923 ff_init_scantable(s
->dsp
.idct_permutation
,&h
->scantable
,ff_zigzag_direct
);
925 skip_bits(&s
->gb
,16);//bbv_dwlay
926 if(h
->stc
== PIC_PB_START_CODE
) {
927 h
->pic_type
= get_bits(&s
->gb
,2) + AV_PICTURE_TYPE_I
;
928 if(h
->pic_type
> AV_PICTURE_TYPE_B
) {
929 av_log(s
->avctx
, AV_LOG_ERROR
, "illegal picture type\n");
932 /* make sure we have the reference frames we need */
933 if(!h
->DPB
[0].f
.data
[0] ||
934 (!h
->DPB
[1].f
.data
[0] && h
->pic_type
== AV_PICTURE_TYPE_B
))
937 h
->pic_type
= AV_PICTURE_TYPE_I
;
938 if(get_bits1(&s
->gb
))
939 skip_bits(&s
->gb
,24);//time_code
940 /* old sample clips were all progressive and no low_delay,
941 bump stream revision if detected otherwise */
942 if (s
->low_delay
|| !(show_bits(&s
->gb
,9) & 1))
943 h
->stream_revision
= 1;
944 /* similarly test top_field_first and repeat_first_field */
945 else if(show_bits(&s
->gb
,11) & 3)
946 h
->stream_revision
= 1;
947 if(h
->stream_revision
> 0)
948 skip_bits(&s
->gb
,1); //marker_bit
950 /* release last B frame */
951 if(h
->picture
.f
.data
[0])
952 s
->avctx
->release_buffer(s
->avctx
, &h
->picture
.f
);
954 ff_get_buffer(s
->avctx
, &h
->picture
.f
);
956 h
->picture
.poc
= get_bits(&s
->gb
,8)*2;
958 /* get temporal distances and MV scaling factors */
959 if(h
->pic_type
!= AV_PICTURE_TYPE_B
) {
960 h
->dist
[0] = (h
->picture
.poc
- h
->DPB
[0].poc
+ 512) % 512;
962 h
->dist
[0] = (h
->DPB
[0].poc
- h
->picture
.poc
+ 512) % 512;
964 h
->dist
[1] = (h
->picture
.poc
- h
->DPB
[1].poc
+ 512) % 512;
965 h
->scale_den
[0] = h
->dist
[0] ?
512/h
->dist
[0] : 0;
966 h
->scale_den
[1] = h
->dist
[1] ?
512/h
->dist
[1] : 0;
967 if(h
->pic_type
== AV_PICTURE_TYPE_B
) {
968 h
->sym_factor
= h
->dist
[0]*h
->scale_den
[1];
970 h
->direct_den
[0] = h
->dist
[0] ?
16384/h
->dist
[0] : 0;
971 h
->direct_den
[1] = h
->dist
[1] ?
16384/h
->dist
[1] : 0;
975 get_ue_golomb(&s
->gb
); //bbv_check_times
976 h
->progressive
= get_bits1(&s
->gb
);
977 h
->pic_structure
= 1;
979 h
->pic_structure
= get_bits1(&s
->gb
);
980 if(!h
->pic_structure
&& h
->stc
== PIC_PB_START_CODE
)
981 skip_bits1(&s
->gb
); //advanced_pred_mode_disable
982 skip_bits1(&s
->gb
); //top_field_first
983 skip_bits1(&s
->gb
); //repeat_first_field
984 h
->qp_fixed
= get_bits1(&s
->gb
);
985 h
->qp
= get_bits(&s
->gb
,6);
986 if(h
->pic_type
== AV_PICTURE_TYPE_I
) {
987 if(!h
->progressive
&& !h
->pic_structure
)
988 skip_bits1(&s
->gb
);//what is this?
989 skip_bits(&s
->gb
,4); //reserved bits
991 if(!(h
->pic_type
== AV_PICTURE_TYPE_B
&& h
->pic_structure
== 1))
992 h
->ref_flag
= get_bits1(&s
->gb
);
993 skip_bits(&s
->gb
,4); //reserved bits
994 h
->skip_mode_flag
= get_bits1(&s
->gb
);
996 h
->loop_filter_disable
= get_bits1(&s
->gb
);
997 if(!h
->loop_filter_disable
&& get_bits1(&s
->gb
)) {
998 h
->alpha_offset
= get_se_golomb(&s
->gb
);
999 h
->beta_offset
= get_se_golomb(&s
->gb
);
1001 h
->alpha_offset
= h
->beta_offset
= 0;
1003 if(h
->pic_type
== AV_PICTURE_TYPE_I
) {
1007 } while(ff_cavs_next_mb(h
));
1008 } else if(h
->pic_type
== AV_PICTURE_TYPE_P
) {
1010 if(check_for_slice(h
))
1012 if(h
->skip_mode_flag
&& (skip_count
< 0))
1013 skip_count
= get_ue_golomb(&s
->gb
);
1014 if(h
->skip_mode_flag
&& skip_count
--) {
1015 decode_mb_p(h
,P_SKIP
);
1017 mb_type
= get_ue_golomb(&s
->gb
) + P_SKIP
+ h
->skip_mode_flag
;
1019 decode_mb_i(h
, mb_type
- P_8X8
- 1);
1021 decode_mb_p(h
,mb_type
);
1023 } while(ff_cavs_next_mb(h
));
1024 } else { /* AV_PICTURE_TYPE_B */
1026 if(check_for_slice(h
))
1028 if(h
->skip_mode_flag
&& (skip_count
< 0))
1029 skip_count
= get_ue_golomb(&s
->gb
);
1030 if(h
->skip_mode_flag
&& skip_count
--) {
1031 decode_mb_b(h
,B_SKIP
);
1033 mb_type
= get_ue_golomb(&s
->gb
) + B_SKIP
+ h
->skip_mode_flag
;
1035 decode_mb_i(h
, mb_type
- B_8X8
- 1);
1037 decode_mb_b(h
,mb_type
);
1039 } while(ff_cavs_next_mb(h
));
1041 if(h
->pic_type
!= AV_PICTURE_TYPE_B
) {
1042 if(h
->DPB
[1].f
.data
[0])
1043 s
->avctx
->release_buffer(s
->avctx
, &h
->DPB
[1].f
);
1044 h
->DPB
[1] = h
->DPB
[0];
1045 h
->DPB
[0] = h
->picture
;
1046 memset(&h
->picture
,0,sizeof(Picture
));
1051 /*****************************************************************************
1053 * headers and interface
1055 ****************************************************************************/
1057 static int decode_seq_header(AVSContext
*h
) {
1058 MpegEncContext
*s
= &h
->s
;
1059 int frame_rate_code
;
1062 h
->profile
= get_bits(&s
->gb
,8);
1063 h
->level
= get_bits(&s
->gb
,8);
1064 skip_bits1(&s
->gb
); //progressive sequence
1066 width
= get_bits(&s
->gb
, 14);
1067 height
= get_bits(&s
->gb
, 14);
1068 if ((s
->width
|| s
->height
) && (s
->width
!= width
|| s
->height
!= height
)) {
1069 av_log_missing_feature(s
, "Width/height changing in CAVS", 0);
1070 return AVERROR_PATCHWELCOME
;
1075 skip_bits(&s
->gb
,2); //chroma format
1076 skip_bits(&s
->gb
,3); //sample_precision
1077 h
->aspect_ratio
= get_bits(&s
->gb
,4);
1078 frame_rate_code
= get_bits(&s
->gb
,4);
1079 skip_bits(&s
->gb
,18);//bit_rate_lower
1080 skip_bits1(&s
->gb
); //marker_bit
1081 skip_bits(&s
->gb
,12);//bit_rate_upper
1082 s
->low_delay
= get_bits1(&s
->gb
);
1083 h
->mb_width
= (s
->width
+ 15) >> 4;
1084 h
->mb_height
= (s
->height
+ 15) >> 4;
1085 h
->s
.avctx
->time_base
.den
= ff_mpeg12_frame_rate_tab
[frame_rate_code
].num
;
1086 h
->s
.avctx
->time_base
.num
= ff_mpeg12_frame_rate_tab
[frame_rate_code
].den
;
1087 h
->s
.avctx
->width
= s
->width
;
1088 h
->s
.avctx
->height
= s
->height
;
1090 ff_cavs_init_top_lines(h
);
1094 static void cavs_flush(AVCodecContext
* avctx
) {
1095 AVSContext
*h
= avctx
->priv_data
;
1096 h
->got_keyframe
= 0;
1099 static int cavs_decode_frame(AVCodecContext
* avctx
,void *data
, int *data_size
,
1101 const uint8_t *buf
= avpkt
->data
;
1102 int buf_size
= avpkt
->size
;
1103 AVSContext
*h
= avctx
->priv_data
;
1104 MpegEncContext
*s
= &h
->s
;
1106 const uint8_t *buf_end
;
1107 const uint8_t *buf_ptr
;
1108 AVFrame
*picture
= data
;
1113 if (buf_size
== 0) {
1114 if (!s
->low_delay
&& h
->DPB
[0].f
.data
[0]) {
1115 *data_size
= sizeof(AVPicture
);
1116 *picture
= h
->DPB
[0].f
;
1117 memset(&h
->DPB
[0], 0, sizeof(h
->DPB
[0]));
1123 buf_end
= buf
+ buf_size
;
1125 buf_ptr
= avpriv_mpv_find_start_code(buf_ptr
,buf_end
, &stc
);
1126 if((stc
& 0xFFFFFE00) || buf_ptr
== buf_end
)
1127 return FFMAX(0, buf_ptr
- buf
- s
->parse_context
.last_index
);
1128 input_size
= (buf_end
- buf_ptr
)*8;
1130 case CAVS_START_CODE
:
1131 init_get_bits(&s
->gb
, buf_ptr
, input_size
);
1132 decode_seq_header(h
);
1134 case PIC_I_START_CODE
:
1135 if(!h
->got_keyframe
) {
1136 if(h
->DPB
[0].f
.data
[0])
1137 avctx
->release_buffer(avctx
, &h
->DPB
[0].f
);
1138 if(h
->DPB
[1].f
.data
[0])
1139 avctx
->release_buffer(avctx
, &h
->DPB
[1].f
);
1140 h
->got_keyframe
= 1;
1142 case PIC_PB_START_CODE
:
1144 if(!h
->got_keyframe
)
1146 init_get_bits(&s
->gb
, buf_ptr
, input_size
);
1150 *data_size
= sizeof(AVPicture
);
1151 if(h
->pic_type
!= AV_PICTURE_TYPE_B
) {
1152 if(h
->DPB
[1].f
.data
[0]) {
1153 *picture
= h
->DPB
[1].f
;
1158 *picture
= h
->picture
.f
;
1160 case EXT_START_CODE
:
1161 //mpeg_decode_extension(avctx,buf_ptr, input_size);
1163 case USER_START_CODE
:
1164 //mpeg_decode_user_data(avctx,buf_ptr, input_size);
1167 if (stc
<= SLICE_MAX_START_CODE
) {
1168 init_get_bits(&s
->gb
, buf_ptr
, input_size
);
1169 decode_slice_header(h
, &s
->gb
);
1176 AVCodec ff_cavs_decoder
= {
1178 .type
= AVMEDIA_TYPE_VIDEO
,
1179 .id
= AV_CODEC_ID_CAVS
,
1180 .priv_data_size
= sizeof(AVSContext
),
1181 .init
= ff_cavs_init
,
1182 .close
= ff_cavs_end
,
1183 .decode
= cavs_decode_frame
,
1184 .capabilities
= CODEC_CAP_DR1
| CODEC_CAP_DELAY
,
1185 .flush
= cavs_flush
,
1186 .long_name
= NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),