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>
33 static const uint8_t mv_scan[4] = {
38 static const uint8_t cbp_tab[64][2] = {
39 {63, 0},{15,15},{31,63},{47,31},{ 0,16},{14,32},{13,47},{11,13},
40 { 7,14},{ 5,11},{10,12},{ 8, 5},{12,10},{61, 7},{ 4,48},{55, 3},
41 { 1, 2},{ 2, 8},{59, 4},{ 3, 1},{62,61},{ 9,55},{ 6,59},{29,62},
42 {45,29},{51,27},{23,23},{39,19},{27,30},{46,28},{53, 9},{30, 6},
43 {43,60},{37,21},{60,44},{16,26},{21,51},{28,35},{19,18},{35,20},
44 {42,24},{26,53},{44,17},{32,37},{58,39},{24,45},{20,58},{17,43},
45 {18,42},{48,46},{22,36},{33,33},{25,34},{49,40},{40,52},{36,49},
46 {34,50},{50,56},{52,25},{54,22},{41,54},{56,57},{38,41},{57,38}
49 static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
51 static const uint8_t cavs_chroma_qp[64] = {
52 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
53 16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
54 32,33,34,35,36,37,38,39,40,41,42,42,43,43,44,44,
55 45,45,46,46,47,47,48,48,48,49,49,49,50,50,50,51
58 static const uint8_t dequant_shift[64] = {
59 14,14,14,14,14,14,14,14,
60 13,13,13,13,13,13,13,13,
61 13,12,12,12,12,12,12,12,
62 11,11,11,11,11,11,11,11,
63 11,10,10,10,10,10,10,10,
64 10, 9, 9, 9, 9, 9, 9, 9,
65 9, 8, 8, 8, 8, 8, 8, 8,
66 7, 7, 7, 7, 7, 7, 7, 7
69 static const uint16_t dequant_mul[64] = {
70 32768,36061,38968,42495,46341,50535,55437,60424,
71 32932,35734,38968,42495,46177,50535,55109,59933,
72 65535,35734,38968,42577,46341,50617,55027,60097,
73 32809,35734,38968,42454,46382,50576,55109,60056,
74 65535,35734,38968,42495,46320,50515,55109,60076,
75 65535,35744,38968,42495,46341,50535,55099,60087,
76 65535,35734,38973,42500,46341,50535,55109,60097,
77 32771,35734,38965,42497,46341,50535,55109,60099
82 static const struct dec_2dvlc intra_dec[7] = {
84 { //level / run / table_inc
85 { 1, 1, 1},{ -1, 1, 1},{ 1, 2, 1},{ -1, 2, 1},{ 1, 3, 1},{ -1, 3, 1},
86 { 1, 4, 1},{ -1, 4, 1},{ 1, 5, 1},{ -1, 5, 1},{ 1, 6, 1},{ -1, 6, 1},
87 { 1, 7, 1},{ -1, 7, 1},{ 1, 8, 1},{ -1, 8, 1},{ 1, 9, 1},{ -1, 9, 1},
88 { 1,10, 1},{ -1,10, 1},{ 1,11, 1},{ -1,11, 1},{ 2, 1, 2},{ -2, 1, 2},
89 { 1,12, 1},{ -1,12, 1},{ 1,13, 1},{ -1,13, 1},{ 1,14, 1},{ -1,14, 1},
90 { 1,15, 1},{ -1,15, 1},{ 2, 2, 2},{ -2, 2, 2},{ 1,16, 1},{ -1,16, 1},
91 { 1,17, 1},{ -1,17, 1},{ 3, 1, 3},{ -3, 1, 3},{ 1,18, 1},{ -1,18, 1},
92 { 1,19, 1},{ -1,19, 1},{ 2, 3, 2},{ -2, 3, 2},{ 1,20, 1},{ -1,20, 1},
93 { 1,21, 1},{ -1,21, 1},{ 2, 4, 2},{ -2, 4, 2},{ 1,22, 1},{ -1,22, 1},
94 { 2, 5, 2},{ -2, 5, 2},{ 1,23, 1},{ -1,23, 1},{ EOB }
97 { 0, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
98 2, 2, 2, 2, 2, 2, 2,-1,-1,-1},
104 { 1, 1, 0},{ -1, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 2, 1, 1},{ -2, 1, 1},
105 { 1, 3, 0},{ -1, 3, 0},{ EOB },{ 1, 4, 0},{ -1, 4, 0},{ 1, 5, 0},
106 { -1, 5, 0},{ 1, 6, 0},{ -1, 6, 0},{ 3, 1, 2},{ -3, 1, 2},{ 2, 2, 1},
107 { -2, 2, 1},{ 1, 7, 0},{ -1, 7, 0},{ 1, 8, 0},{ -1, 8, 0},{ 1, 9, 0},
108 { -1, 9, 0},{ 2, 3, 1},{ -2, 3, 1},{ 4, 1, 2},{ -4, 1, 2},{ 1,10, 0},
109 { -1,10, 0},{ 1,11, 0},{ -1,11, 0},{ 2, 4, 1},{ -2, 4, 1},{ 3, 2, 2},
110 { -3, 2, 2},{ 1,12, 0},{ -1,12, 0},{ 2, 5, 1},{ -2, 5, 1},{ 5, 1, 3},
111 { -5, 1, 3},{ 1,13, 0},{ -1,13, 0},{ 2, 6, 1},{ -2, 6, 1},{ 1,14, 0},
112 { -1,14, 0},{ 2, 7, 1},{ -2, 7, 1},{ 2, 8, 1},{ -2, 8, 1},{ 3, 3, 2},
113 { -3, 3, 2},{ 6, 1, 3},{ -6, 1, 3},{ 1,15, 0},{ -1,15, 0}
116 { 0, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2,-1,
117 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
123 { 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 1, 2, 0},{ -1, 2, 0},
124 { 3, 1, 1},{ -3, 1, 1},{ EOB },{ 1, 3, 0},{ -1, 3, 0},{ 2, 2, 0},
125 { -2, 2, 0},{ 4, 1, 1},{ -4, 1, 1},{ 1, 4, 0},{ -1, 4, 0},{ 5, 1, 2},
126 { -5, 1, 2},{ 1, 5, 0},{ -1, 5, 0},{ 3, 2, 1},{ -3, 2, 1},{ 2, 3, 0},
127 { -2, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 6, 1, 2},{ -6, 1, 2},{ 2, 4, 0},
128 { -2, 4, 0},{ 1, 7, 0},{ -1, 7, 0},{ 4, 2, 1},{ -4, 2, 1},{ 7, 1, 2},
129 { -7, 1, 2},{ 3, 3, 1},{ -3, 3, 1},{ 2, 5, 0},{ -2, 5, 0},{ 1, 8, 0},
130 { -1, 8, 0},{ 2, 6, 0},{ -2, 6, 0},{ 8, 1, 3},{ -8, 1, 3},{ 1, 9, 0},
131 { -1, 9, 0},{ 5, 2, 2},{ -5, 2, 2},{ 3, 4, 1},{ -3, 4, 1},{ 2, 7, 0},
132 { -2, 7, 0},{ 9, 1, 3},{ -9, 1, 3},{ 1,10, 0},{ -1,10, 0}
135 { 0,10, 6, 4, 4, 3, 3, 3, 2, 2, 2,-1,-1,-1,-1,-1,-1,
136 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
142 { 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},{ -3, 1, 0},
143 { 1, 2, 0},{ -1, 2, 0},{ EOB },{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 1},
144 { -5, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 1, 3, 0},{ -1, 3, 0},{ 6, 1, 1},
145 { -6, 1, 1},{ 3, 2, 0},{ -3, 2, 0},{ 7, 1, 1},{ -7, 1, 1},{ 1, 4, 0},
146 { -1, 4, 0},{ 8, 1, 2},{ -8, 1, 2},{ 2, 3, 0},{ -2, 3, 0},{ 4, 2, 0},
147 { -4, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 9, 1, 2},{ -9, 1, 2},{ 5, 2, 1},
148 { -5, 2, 1},{ 2, 4, 0},{ -2, 4, 0},{ 10, 1, 2},{-10, 1, 2},{ 3, 3, 0},
149 { -3, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 11, 1, 3},{-11, 1, 3},{ 6, 2, 1},
150 { -6, 2, 1},{ 1, 7, 0},{ -1, 7, 0},{ 2, 5, 0},{ -2, 5, 0},{ 3, 4, 0},
151 { -3, 4, 0},{ 12, 1, 3},{-12, 1, 3},{ 4, 3, 0},{ -4, 3, 0}
154 { 0,13, 7, 5, 4, 3, 2, 2,-1,-1,-1 -1,-1,-1,-1,-1,-1,
155 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
161 { 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},{ -3, 1, 0},
162 { EOB },{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
163 { -6, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 1},
164 { -8, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 9, 1, 1},{ -9, 1, 1},{ 10, 1, 1},
165 {-10, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 3, 2, 0},{ -3, 2, 0},{ 11, 1, 2},
166 {-11, 1, 2},{ 4, 2, 0},{ -4, 2, 0},{ 12, 1, 2},{-12, 1, 2},{ 13, 1, 2},
167 {-13, 1, 2},{ 5, 2, 0},{ -5, 2, 0},{ 1, 4, 0},{ -1, 4, 0},{ 2, 3, 0},
168 { -2, 3, 0},{ 14, 1, 2},{-14, 1, 2},{ 6, 2, 0},{ -6, 2, 0},{ 15, 1, 2},
169 {-15, 1, 2},{ 16, 1, 2},{-16, 1, 2},{ 3, 3, 0},{ -3, 3, 0},{ 1, 5, 0},
170 { -1, 5, 0},{ 7, 2, 0},{ -7, 2, 0},{ 17, 1, 2},{-17, 1, 2}
173 { 0,18, 8, 4, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
174 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
180 { EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
181 { -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
182 { -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},{ -8, 1, 0},{ 9, 1, 0},
183 { -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 11, 1, 1},
184 {-11, 1, 1},{ 12, 1, 1},{-12, 1, 1},{ 13, 1, 1},{-13, 1, 1},{ 2, 2, 0},
185 { -2, 2, 0},{ 14, 1, 1},{-14, 1, 1},{ 15, 1, 1},{-15, 1, 1},{ 3, 2, 0},
186 { -3, 2, 0},{ 16, 1, 1},{-16, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 17, 1, 1},
187 {-17, 1, 1},{ 4, 2, 0},{ -4, 2, 0},{ 18, 1, 1},{-18, 1, 1},{ 5, 2, 0},
188 { -5, 2, 0},{ 19, 1, 1},{-19, 1, 1},{ 20, 1, 1},{-20, 1, 1},{ 6, 2, 0},
189 { -6, 2, 0},{ 21, 1, 1},{-21, 1, 1},{ 2, 3, 0},{ -2, 3, 0}
192 { 0,22, 7, 3,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
193 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
199 { EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
200 { -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
201 { -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},{ -8, 1, 0},{ 9, 1, 0},
202 { -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 11, 1, 0},{-11, 1, 0},{ 12, 1, 0},
203 {-12, 1, 0},{ 13, 1, 0},{-13, 1, 0},{ 14, 1, 0},{-14, 1, 0},{ 15, 1, 0},
204 {-15, 1, 0},{ 16, 1, 0},{-16, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 17, 1, 0},
205 {-17, 1, 0},{ 18, 1, 0},{-18, 1, 0},{ 19, 1, 0},{-19, 1, 0},{ 20, 1, 0},
206 {-20, 1, 0},{ 21, 1, 0},{-21, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 22, 1, 0},
207 {-22, 1, 0},{ 23, 1, 0},{-23, 1, 0},{ 24, 1, 0},{-24, 1, 0},{ 25, 1, 0},
208 {-25, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 26, 1, 0},{-26, 1, 0}
211 { 0,27, 4,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
212 -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,
235 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,
254 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,
273 -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,
292 -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,
311 -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,
330 -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,
349 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
356 static const struct dec_2dvlc chroma_dec[5] = {
359 { 1, 1, 1},{ -1, 1, 1},{ 1, 2, 1},{ -1, 2, 1},{ 1, 3, 1},{ -1, 3, 1},
360 { 1, 4, 1},{ -1, 4, 1},{ 1, 5, 1},{ -1, 5, 1},{ 1, 6, 1},{ -1, 6, 1},
361 { 1, 7, 1},{ -1, 7, 1},{ 2, 1, 2},{ -2, 1, 2},{ 1, 8, 1},{ -1, 8, 1},
362 { 1, 9, 1},{ -1, 9, 1},{ 1,10, 1},{ -1,10, 1},{ 1,11, 1},{ -1,11, 1},
363 { 1,12, 1},{ -1,12, 1},{ 1,13, 1},{ -1,13, 1},{ 1,14, 1},{ -1,14, 1},
364 { 1,15, 1},{ -1,15, 1},{ 3, 1, 3},{ -3, 1, 3},{ 1,16, 1},{ -1,16, 1},
365 { 1,17, 1},{ -1,17, 1},{ 1,18, 1},{ -1,18, 1},{ 1,19, 1},{ -1,19, 1},
366 { 1,20, 1},{ -1,20, 1},{ 1,21, 1},{ -1,21, 1},{ 1,22, 1},{ -1,22, 1},
367 { 2, 2, 2},{ -2, 2, 2},{ 1,23, 1},{ -1,23, 1},{ 1,24, 1},{ -1,24, 1},
368 { 1,25, 1},{ -1,25, 1},{ 4, 1, 3},{ -4, 1, 3},{ EOB }
371 { 0, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
372 2, 2, 2, 2, 2, 2, 2, 2, 2,-1},
378 { EOB },{ 1, 1, 0},{ -1, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 2, 1, 1},
379 { -2, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 1, 4, 0},{ -1, 4, 0},{ 1, 5, 0},
380 { -1, 5, 0},{ 1, 6, 0},{ -1, 6, 0},{ 3, 1, 2},{ -3, 1, 2},{ 1, 7, 0},
381 { -1, 7, 0},{ 1, 8, 0},{ -1, 8, 0},{ 2, 2, 1},{ -2, 2, 1},{ 1, 9, 0},
382 { -1, 9, 0},{ 1,10, 0},{ -1,10, 0},{ 1,11, 0},{ -1,11, 0},{ 4, 1, 2},
383 { -4, 1, 2},{ 1,12, 0},{ -1,12, 0},{ 1,13, 0},{ -1,13, 0},{ 1,14, 0},
384 { -1,14, 0},{ 2, 3, 1},{ -2, 3, 1},{ 1,15, 0},{ -1,15, 0},{ 2, 4, 1},
385 { -2, 4, 1},{ 5, 1, 3},{ -5, 1, 3},{ 3, 2, 2},{ -3, 2, 2},{ 1,16, 0},
386 { -1,16, 0},{ 1,17, 0},{ -1,17, 0},{ 1,18, 0},{ -1,18, 0},{ 2, 5, 1},
387 { -2, 5, 1},{ 1,19, 0},{ -1,19, 0},{ 1,20, 0},{ -1,20, 0}
390 { 0, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
391 2, 2, 2, 2,-1,-1,-1,-1,-1,-1},
397 { 1, 1, 0},{ -1, 1, 0},{ EOB },{ 2, 1, 0},{ -2, 1, 0},{ 1, 2, 0},
398 { -1, 2, 0},{ 3, 1, 1},{ -3, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 4, 1, 1},
399 { -4, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 1, 4, 0},{ -1, 4, 0},{ 5, 1, 2},
400 { -5, 1, 2},{ 1, 5, 0},{ -1, 5, 0},{ 3, 2, 1},{ -3, 2, 1},{ 2, 3, 0},
401 { -2, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 6, 1, 2},{ -6, 1, 2},{ 1, 7, 0},
402 { -1, 7, 0},{ 2, 4, 0},{ -2, 4, 0},{ 7, 1, 2},{ -7, 1, 2},{ 1, 8, 0},
403 { -1, 8, 0},{ 4, 2, 1},{ -4, 2, 1},{ 1, 9, 0},{ -1, 9, 0},{ 3, 3, 1},
404 { -3, 3, 1},{ 2, 5, 0},{ -2, 5, 0},{ 2, 6, 0},{ -2, 6, 0},{ 8, 1, 2},
405 { -8, 1, 2},{ 1,10, 0},{ -1,10, 0},{ 1,11, 0},{ -1,11, 0},{ 9, 1, 2},
406 { -9, 1, 2},{ 5, 2, 2},{ -5, 2, 2},{ 3, 4, 1},{ -3, 4, 1},
409 { 0,10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2,-1,-1,-1,-1,-1,
410 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
416 { EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
417 { -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 5, 1, 1},
418 { -5, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 6, 1, 1},{ -6, 1, 1},{ 1, 3, 0},
419 { -1, 3, 0},{ 7, 1, 1},{ -7, 1, 1},{ 3, 2, 0},{ -3, 2, 0},{ 8, 1, 1},
420 { -8, 1, 1},{ 1, 4, 0},{ -1, 4, 0},{ 2, 3, 0},{ -2, 3, 0},{ 9, 1, 1},
421 { -9, 1, 1},{ 4, 2, 0},{ -4, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 10, 1, 1},
422 {-10, 1, 1},{ 3, 3, 0},{ -3, 3, 0},{ 5, 2, 1},{ -5, 2, 1},{ 2, 4, 0},
423 { -2, 4, 0},{ 11, 1, 1},{-11, 1, 1},{ 1, 6, 0},{ -1, 6, 0},{ 12, 1, 1},
424 {-12, 1, 1},{ 1, 7, 0},{ -1, 7, 0},{ 6, 2, 1},{ -6, 2, 1},{ 13, 1, 1},
425 {-13, 1, 1},{ 2, 5, 0},{ -2, 5, 0},{ 1, 8, 0},{ -1, 8, 0},
428 { 0,14, 7, 4, 3, 3, 2, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,
429 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
435 { EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
436 { -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
437 { -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},{ -8, 1, 0},{ 1, 2, 0},
438 { -1, 2, 0},{ 9, 1, 0},{ -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 11, 1, 0},
439 {-11, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 12, 1, 0},{-12, 1, 0},{ 13, 1, 0},
440 {-13, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 14, 1, 0},{-14, 1, 0},{ 1, 3, 0},
441 { -1, 3, 0},{ 15, 1, 0},{-15, 1, 0},{ 4, 2, 0},{ -4, 2, 0},{ 16, 1, 0},
442 {-16, 1, 0},{ 17, 1, 0},{-17, 1, 0},{ 5, 2, 0},{ -5, 2, 0},{ 1, 4, 0},
443 { -1, 4, 0},{ 2, 3, 0},{ -2, 3, 0},{ 18, 1, 0},{-18, 1, 0},{ 6, 2, 0},
444 { -6, 2, 0},{ 19, 1, 0},{-19, 1, 0},{ 1, 5, 0},{ -1, 5, 0},
447 { 0,20, 7, 3, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
448 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},
457 /*****************************************************************************
459 * motion vector prediction
461 ****************************************************************************/
463 static inline void store_mvs(AVSContext *h) {
464 h->col_mv[h->mbidx*4 + 0] = h->mv[MV_FWD_X0];
465 h->col_mv[h->mbidx*4 + 1] = h->mv[MV_FWD_X1];
466 h->col_mv[h->mbidx*4 + 2] = h->mv[MV_FWD_X2];
467 h->col_mv[h->mbidx*4 + 3] = h->mv[MV_FWD_X3];
470 static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
471 cavs_vector *col_mv) {
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, enum cavs_block size) {
489 cavs_vector *dst = src + MV_BWD_OFFS;
491 /* backward mv is the scaled and negated forward mv */
492 dst->x = -((src->x * h->sym_factor + 256) >> 9);
493 dst->y = -((src->y * h->sym_factor + 256) >> 9);
495 dst->dist = h->dist[0];
499 /*****************************************************************************
501 * residual data decoding
503 ****************************************************************************/
505 /** kth-order exponential golomb code */
506 static inline int get_ue_code(GetBitContext *gb, int order) {
508 int ret = get_ue_golomb(gb) << order;
509 return ret + get_bits(gb,order);
511 return get_ue_golomb(gb);
514 static inline int dequant(AVSContext *h, DCTELEM *level_buf, uint8_t *run_buf,
515 DCTELEM *dst, int mul, int shift, int coeff_num) {
516 int round = 1 << (shift - 1);
518 const uint8_t *scantab = h->scantable.permutated;
520 /* inverse scan and dequantization */
521 while(--coeff_num >= 0){
522 pos += run_buf[coeff_num];
524 av_log(h->s.avctx, AV_LOG_ERROR,
525 "position out of block bounds at pic %d MB(%d,%d)\n",
526 h->picture.poc, h->mbx, h->mby);
529 dst[scantab[pos]] = (level_buf[coeff_num]*mul + round) >> shift;
535 * decode coefficients from one 8x8 block, dequantize, inverse transform
536 * and add them to sample block
537 * @param r pointer to 2D VLC table
538 * @param esc_golomb_order escape codes are k-golomb with this order k
539 * @param qp quantizer
540 * @param dst location of sample block
541 * @param stride line stride in frame buffer
543 static int decode_residual_block(AVSContext *h, GetBitContext *gb,
544 const struct dec_2dvlc *r, int esc_golomb_order,
545 int qp, uint8_t *dst, int stride) {
546 int i, level_code, esc_code, level, run, mask;
547 DCTELEM level_buf[65];
549 DCTELEM *block = h->block;
552 level_code = get_ue_code(gb,r->golomb_order);
553 if(level_code >= ESCAPE_CODE) {
554 run = ((level_code - ESCAPE_CODE) >> 1) + 1;
555 esc_code = get_ue_code(gb,esc_golomb_order);
556 level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
557 while(level > r->inc_limit)
559 mask = -(level_code & 1);
560 level = (level^mask) - mask;
561 } else if (level_code >= 0) {
562 level = r->rltab[level_code][0];
563 if(!level) //end of block signal
565 run = r->rltab[level_code][1];
566 r += r->rltab[level_code][2];
570 level_buf[i] = level;
573 if (dequant(h, level_buf, run_buf, block, dequant_mul[qp],
574 dequant_shift[qp], i))
576 h->cdsp.cavs_idct8_add(dst,block,stride);
577 h->s.dsp.clear_block(block);
582 static inline void decode_residual_chroma(AVSContext *h) {
584 decode_residual_block(h, &h->s.gb, chroma_dec, 0,
585 cavs_chroma_qp[h->qp], h->cu, h->c_stride);
587 decode_residual_block(h, &h->s.gb, chroma_dec, 0,
588 cavs_chroma_qp[h->qp], h->cv, h->c_stride);
591 static inline int decode_residual_inter(AVSContext *h) {
594 /* get coded block pattern */
595 int cbp= get_ue_golomb(&h->s.gb);
597 av_log(h->s.avctx, AV_LOG_ERROR, "illegal inter cbp\n");
600 h->cbp = cbp_tab[cbp][1];
603 if(h->cbp && !h->qp_fixed)
604 h->qp = (h->qp + get_se_golomb(&h->s.gb)) & 63;
605 for(block=0;block<4;block++)
606 if(h->cbp & (1<<block))
607 decode_residual_block(h, &h->s.gb, inter_dec, 0, h->qp,
608 h->cy + h->luma_scan[block], h->l_stride);
609 decode_residual_chroma(h);
614 /*****************************************************************************
618 ****************************************************************************/
620 static inline void set_mv_intra(AVSContext *h) {
621 h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
622 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
623 h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
624 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
625 if(h->pic_type != AV_PICTURE_TYPE_B)
626 h->col_type_base[h->mbidx] = I_8X8;
629 static int decode_mb_i(AVSContext *h, int cbp_code) {
630 GetBitContext *gb = &h->s.gb;
631 unsigned pred_mode_uv;
634 uint8_t *left = NULL;
639 /* get intra prediction modes from stream */
640 for(block=0;block<4;block++) {
642 int pos = scan3x3[block];
644 nA = h->pred_mode_Y[pos-1];
645 nB = h->pred_mode_Y[pos-3];
646 predpred = FFMIN(nA,nB);
647 if(predpred == NOT_AVAIL) // if either is not available
648 predpred = INTRA_L_LP;
650 int rem_mode= get_bits(gb, 2);
651 predpred = rem_mode + (rem_mode >= predpred);
653 h->pred_mode_Y[pos] = predpred;
655 pred_mode_uv = get_ue_golomb(gb);
656 if(pred_mode_uv > 6) {
657 av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
660 ff_cavs_modify_mb_i(h, &pred_mode_uv);
662 /* get coded block pattern */
663 if(h->pic_type == AV_PICTURE_TYPE_I)
664 cbp_code = get_ue_golomb(gb);
666 av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra cbp\n");
669 h->cbp = cbp_tab[cbp_code][0];
670 if(h->cbp && !h->qp_fixed)
671 h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
673 /* luma intra prediction interleaved with residual decode/transform/add */
674 for(block=0;block<4;block++) {
675 d = h->cy + h->luma_scan[block];
676 ff_cavs_load_intra_pred_luma(h, top, &left, block);
677 h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
678 (d, top, left, h->l_stride);
679 if(h->cbp & (1<<block))
680 decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
683 /* chroma intra prediction */
684 ff_cavs_load_intra_pred_chroma(h);
685 h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx*10],
686 h->left_border_u, h->c_stride);
687 h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx*10],
688 h->left_border_v, h->c_stride);
690 decode_residual_chroma(h);
691 ff_cavs_filter(h,I_8X8);
696 static inline void set_intra_mode_default(AVSContext *h) {
697 if(h->stream_revision > 0) {
698 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
699 h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = NOT_AVAIL;
701 h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
702 h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = INTRA_L_LP;
706 static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type) {
707 GetBitContext *gb = &h->s.gb;
713 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
716 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
717 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16,ref[0]);
720 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
721 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
722 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
723 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
726 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
727 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
728 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
729 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, ref[1]);
732 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
733 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
734 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
735 ref[3] = h->ref_flag ? 0 : get_bits1(gb);
736 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
737 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
738 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
739 ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
741 ff_cavs_inter(h, mb_type);
742 set_intra_mode_default(h);
744 if(mb_type != P_SKIP)
745 decode_residual_inter(h);
746 ff_cavs_filter(h,mb_type);
747 h->col_type_base[h->mbidx] = mb_type;
750 static void decode_mb_b(AVSContext *h, enum cavs_mb mb_type) {
752 enum cavs_sub_mb sub_type[4];
758 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
759 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
760 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
761 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
765 if(!h->col_type_base[h->mbidx]) {
766 /* intra MB at co-location, do in-plane prediction */
767 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
768 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
770 /* direct prediction from co-located P MB, block-wise */
771 for(block=0;block<4;block++)
772 mv_pred_direct(h,&h->mv[mv_scan[block]],
773 &h->col_mv[h->mbidx*4 + block]);
776 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
779 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
780 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
783 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
786 for(block=0;block<4;block++)
787 sub_type[block] = get_bits(&h->s.gb,2);
788 for(block=0;block<4;block++) {
789 switch(sub_type[block]) {
791 if(!h->col_type_base[h->mbidx]) {
792 /* intra MB at co-location, do in-plane prediction */
793 ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
794 MV_PRED_BSKIP, BLK_8X8, 1);
795 ff_cavs_mv(h, mv_scan[block]+MV_BWD_OFFS,
796 mv_scan[block]-3+MV_BWD_OFFS,
797 MV_PRED_BSKIP, BLK_8X8, 0);
799 mv_pred_direct(h,&h->mv[mv_scan[block]],
800 &h->col_mv[h->mbidx*4 + block]);
803 ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
804 MV_PRED_MEDIAN, BLK_8X8, 1);
807 ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
808 MV_PRED_MEDIAN, BLK_8X8, 1);
809 mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
813 for(block=0;block<4;block++) {
814 if(sub_type[block] == B_SUB_BWD)
815 ff_cavs_mv(h, mv_scan[block]+MV_BWD_OFFS,
816 mv_scan[block]+MV_BWD_OFFS-3,
817 MV_PRED_MEDIAN, BLK_8X8, 0);
821 assert((mb_type > B_SYM_16X16) && (mb_type < B_8X8));
822 flags = ff_cavs_partition_flags[mb_type];
823 if(mb_type & 1) { /* 16x8 macroblock types */
825 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
827 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
829 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
831 mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
833 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
835 ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
836 } else { /* 8x16 macroblock types */
838 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
840 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
842 ff_cavs_mv(h,MV_FWD_X1,MV_FWD_C2,MV_PRED_TOPRIGHT,BLK_8X16,1);
844 mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
846 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
848 ff_cavs_mv(h,MV_BWD_X1,MV_BWD_C2,MV_PRED_TOPRIGHT,BLK_8X16,0);
851 ff_cavs_inter(h, mb_type);
852 set_intra_mode_default(h);
853 if(mb_type != B_SKIP)
854 decode_residual_inter(h);
855 ff_cavs_filter(h,mb_type);
858 /*****************************************************************************
862 ****************************************************************************/
864 static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) {
866 av_log(h->s.avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
868 h->mbidx = h->mby*h->mb_width;
870 /* mark top macroblocks as unavailable */
871 h->flags &= ~(B_AVAIL|C_AVAIL);
872 if((h->mby == 0) && (!h->qp_fixed)){
873 h->qp_fixed = get_bits1(gb);
874 h->qp = get_bits(gb,6);
876 /* inter frame or second slice can have weighting params */
877 if((h->pic_type != AV_PICTURE_TYPE_I) || (!h->pic_structure && h->mby >= h->mb_width/2))
878 if(get_bits1(gb)) { //slice_weighting_flag
879 av_log(h->s.avctx, AV_LOG_ERROR,
880 "weighted prediction not yet supported\n");
885 static inline int check_for_slice(AVSContext *h) {
886 GetBitContext *gb = &h->s.gb;
891 align = (-get_bits_count(gb)) & 7;
892 /* check for stuffing byte */
893 if(!align && (show_bits(gb,8) == 0x80))
895 if((show_bits_long(gb,24+align) & 0xFFFFFF) == 0x000001) {
896 skip_bits_long(gb,24+align);
897 h->stc = get_bits(gb,8);
898 if (h->stc >= h->mb_height)
900 decode_slice_header(h,gb);
906 /*****************************************************************************
910 ****************************************************************************/
912 static int decode_pic(AVSContext *h) {
913 MpegEncContext *s = &h->s;
915 enum cavs_mb mb_type;
917 if (!s->context_initialized) {
918 if (ff_MPV_common_init(s) < 0)
920 ff_init_scantable_permutation(s->dsp.idct_permutation,
922 ff_init_scantable(s->dsp.idct_permutation,&h->scantable,ff_zigzag_direct);
924 skip_bits(&s->gb,16);//bbv_dwlay
925 if(h->stc == PIC_PB_START_CODE) {
926 h->pic_type = get_bits(&s->gb,2) + AV_PICTURE_TYPE_I;
927 if(h->pic_type > AV_PICTURE_TYPE_B) {
928 av_log(s->avctx, AV_LOG_ERROR, "illegal picture type\n");
931 /* make sure we have the reference frames we need */
932 if(!h->DPB[0].f.data[0] ||
933 (!h->DPB[1].f.data[0] && h->pic_type == AV_PICTURE_TYPE_B))
936 h->pic_type = AV_PICTURE_TYPE_I;
937 if(get_bits1(&s->gb))
938 skip_bits(&s->gb,24);//time_code
939 /* old sample clips were all progressive and no low_delay,
940 bump stream revision if detected otherwise */
941 if (s->low_delay || !(show_bits(&s->gb,9) & 1))
942 h->stream_revision = 1;
943 /* similarly test top_field_first and repeat_first_field */
944 else if(show_bits(&s->gb,11) & 3)
945 h->stream_revision = 1;
946 if(h->stream_revision > 0)
947 skip_bits(&s->gb,1); //marker_bit
949 /* release last B frame */
950 if(h->picture.f.data[0])
951 s->avctx->release_buffer(s->avctx, &h->picture.f);
953 s->avctx->get_buffer(s->avctx, &h->picture.f);
955 h->picture.poc = get_bits(&s->gb,8)*2;
957 /* get temporal distances and MV scaling factors */
958 if(h->pic_type != AV_PICTURE_TYPE_B) {
959 h->dist[0] = (h->picture.poc - h->DPB[0].poc + 512) % 512;
961 h->dist[0] = (h->DPB[0].poc - h->picture.poc + 512) % 512;
963 h->dist[1] = (h->picture.poc - h->DPB[1].poc + 512) % 512;
964 h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
965 h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
966 if(h->pic_type == AV_PICTURE_TYPE_B) {
967 h->sym_factor = h->dist[0]*h->scale_den[1];
969 h->direct_den[0] = h->dist[0] ? 16384/h->dist[0] : 0;
970 h->direct_den[1] = h->dist[1] ? 16384/h->dist[1] : 0;
974 get_ue_golomb(&s->gb); //bbv_check_times
975 h->progressive = get_bits1(&s->gb);
976 h->pic_structure = 1;
978 h->pic_structure = get_bits1(&s->gb);
979 if(!h->pic_structure && h->stc == PIC_PB_START_CODE)
980 skip_bits1(&s->gb); //advanced_pred_mode_disable
981 skip_bits1(&s->gb); //top_field_first
982 skip_bits1(&s->gb); //repeat_first_field
983 h->qp_fixed = get_bits1(&s->gb);
984 h->qp = get_bits(&s->gb,6);
985 if(h->pic_type == AV_PICTURE_TYPE_I) {
986 if(!h->progressive && !h->pic_structure)
987 skip_bits1(&s->gb);//what is this?
988 skip_bits(&s->gb,4); //reserved bits
990 if(!(h->pic_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
991 h->ref_flag = get_bits1(&s->gb);
992 skip_bits(&s->gb,4); //reserved bits
993 h->skip_mode_flag = get_bits1(&s->gb);
995 h->loop_filter_disable = get_bits1(&s->gb);
996 if(!h->loop_filter_disable && get_bits1(&s->gb)) {
997 h->alpha_offset = get_se_golomb(&s->gb);
998 h->beta_offset = get_se_golomb(&s->gb);
1000 h->alpha_offset = h->beta_offset = 0;
1002 if(h->pic_type == AV_PICTURE_TYPE_I) {
1006 } while(ff_cavs_next_mb(h));
1007 } else if(h->pic_type == AV_PICTURE_TYPE_P) {
1009 if(check_for_slice(h))
1011 if(h->skip_mode_flag && (skip_count < 0))
1012 skip_count = get_ue_golomb(&s->gb);
1013 if(h->skip_mode_flag && skip_count--) {
1014 decode_mb_p(h,P_SKIP);
1016 mb_type = get_ue_golomb(&s->gb) + P_SKIP + h->skip_mode_flag;
1018 decode_mb_i(h, mb_type - P_8X8 - 1);
1020 decode_mb_p(h,mb_type);
1022 } while(ff_cavs_next_mb(h));
1023 } else { /* AV_PICTURE_TYPE_B */
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_b(h,B_SKIP);
1032 mb_type = get_ue_golomb(&s->gb) + B_SKIP + h->skip_mode_flag;
1034 decode_mb_i(h, mb_type - B_8X8 - 1);
1036 decode_mb_b(h,mb_type);
1038 } while(ff_cavs_next_mb(h));
1040 if(h->pic_type != AV_PICTURE_TYPE_B) {
1041 if(h->DPB[1].f.data[0])
1042 s->avctx->release_buffer(s->avctx, &h->DPB[1].f);
1043 h->DPB[1] = h->DPB[0];
1044 h->DPB[0] = h->picture;
1045 memset(&h->picture,0,sizeof(Picture));
1050 /*****************************************************************************
1052 * headers and interface
1054 ****************************************************************************/
1056 static int decode_seq_header(AVSContext *h) {
1057 MpegEncContext *s = &h->s;
1058 int frame_rate_code;
1061 h->profile = get_bits(&s->gb,8);
1062 h->level = get_bits(&s->gb,8);
1063 skip_bits1(&s->gb); //progressive sequence
1065 width = get_bits(&s->gb, 14);
1066 height = get_bits(&s->gb, 14);
1067 if ((s->width || s->height) && (s->width != width || s->height != height)) {
1068 av_log_missing_feature(s, "Width/height changing in CAVS", 0);
1069 return AVERROR_PATCHWELCOME;
1074 skip_bits(&s->gb,2); //chroma format
1075 skip_bits(&s->gb,3); //sample_precision
1076 h->aspect_ratio = get_bits(&s->gb,4);
1077 frame_rate_code = get_bits(&s->gb,4);
1078 skip_bits(&s->gb,18);//bit_rate_lower
1079 skip_bits1(&s->gb); //marker_bit
1080 skip_bits(&s->gb,12);//bit_rate_upper
1081 s->low_delay = get_bits1(&s->gb);
1082 h->mb_width = (s->width + 15) >> 4;
1083 h->mb_height = (s->height + 15) >> 4;
1084 h->s.avctx->time_base.den = ff_mpeg12_frame_rate_tab[frame_rate_code].num;
1085 h->s.avctx->time_base.num = ff_mpeg12_frame_rate_tab[frame_rate_code].den;
1086 h->s.avctx->width = s->width;
1087 h->s.avctx->height = s->height;
1089 ff_cavs_init_top_lines(h);
1093 static void cavs_flush(AVCodecContext * avctx) {
1094 AVSContext *h = avctx->priv_data;
1095 h->got_keyframe = 0;
1098 static int cavs_decode_frame(AVCodecContext * avctx,void *data, int *data_size,
1100 const uint8_t *buf = avpkt->data;
1101 int buf_size = avpkt->size;
1102 AVSContext *h = avctx->priv_data;
1103 MpegEncContext *s = &h->s;
1105 const uint8_t *buf_end;
1106 const uint8_t *buf_ptr;
1107 AVFrame *picture = data;
1112 if (buf_size == 0) {
1113 if (!s->low_delay && h->DPB[0].f.data[0]) {
1114 *data_size = sizeof(AVPicture);
1115 *picture = h->DPB[0].f;
1116 memset(&h->DPB[0], 0, sizeof(h->DPB[0]));
1122 buf_end = buf + buf_size;
1124 buf_ptr = avpriv_mpv_find_start_code(buf_ptr,buf_end, &stc);
1125 if((stc & 0xFFFFFE00) || buf_ptr == buf_end)
1126 return FFMAX(0, buf_ptr - buf - s->parse_context.last_index);
1127 input_size = (buf_end - buf_ptr)*8;
1129 case CAVS_START_CODE:
1130 init_get_bits(&s->gb, buf_ptr, input_size);
1131 decode_seq_header(h);
1133 case PIC_I_START_CODE:
1134 if(!h->got_keyframe) {
1135 if(h->DPB[0].f.data[0])
1136 avctx->release_buffer(avctx, &h->DPB[0].f);
1137 if(h->DPB[1].f.data[0])
1138 avctx->release_buffer(avctx, &h->DPB[1].f);
1139 h->got_keyframe = 1;
1141 case PIC_PB_START_CODE:
1143 if(!h->got_keyframe)
1145 init_get_bits(&s->gb, buf_ptr, input_size);
1149 *data_size = sizeof(AVPicture);
1150 if(h->pic_type != AV_PICTURE_TYPE_B) {
1151 if(h->DPB[1].f.data[0]) {
1152 *picture = h->DPB[1].f;
1157 *picture = h->picture.f;
1159 case EXT_START_CODE:
1160 //mpeg_decode_extension(avctx,buf_ptr, input_size);
1162 case USER_START_CODE:
1163 //mpeg_decode_user_data(avctx,buf_ptr, input_size);
1166 if (stc <= SLICE_MAX_START_CODE) {
1167 init_get_bits(&s->gb, buf_ptr, input_size);
1168 decode_slice_header(h, &s->gb);
1175 AVCodec ff_cavs_decoder = {
1177 .type = AVMEDIA_TYPE_VIDEO,
1178 .id = AV_CODEC_ID_CAVS,
1179 .priv_data_size = sizeof(AVSContext),
1180 .init = ff_cavs_init,
1181 .close = ff_cavs_end,
1182 .decode = cavs_decode_frame,
1183 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
1184 .flush = cavs_flush,
1185 .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),