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 FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
25 * @author Stefan Gehrer <stefan.gehrer@gmx.de>
28 #include "libavutil/avassert.h"
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, esc_code, level, mask;
548 unsigned int level_code, run;
549 DCTELEM level_buf[65];
551 DCTELEM *block = h->block;
554 level_code = get_ue_code(gb,r->golomb_order);
555 if(level_code >= ESCAPE_CODE) {
556 run = ((level_code - ESCAPE_CODE) >> 1) + 1;
559 esc_code = get_ue_code(gb,esc_golomb_order);
560 level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
561 while(level > r->inc_limit)
563 mask = -(level_code & 1);
564 level = (level^mask) - mask;
566 level = r->rltab[level_code][0];
567 if(!level) //end of block signal
569 run = r->rltab[level_code][1];
570 r += r->rltab[level_code][2];
572 level_buf[i] = level;
575 if (dequant(h, level_buf, run_buf, block, dequant_mul[qp],
576 dequant_shift[qp], i))
578 h->cdsp.cavs_idct8_add(dst,block,stride);
579 h->s.dsp.clear_block(block);
584 static inline void decode_residual_chroma(AVSContext *h) {
586 decode_residual_block(h, &h->s.gb, chroma_dec, 0,
587 cavs_chroma_qp[h->qp], h->cu, h->c_stride);
589 decode_residual_block(h, &h->s.gb, chroma_dec, 0,
590 cavs_chroma_qp[h->qp], h->cv, h->c_stride);
593 static inline int decode_residual_inter(AVSContext *h) {
596 /* get coded block pattern */
597 int cbp= get_ue_golomb(&h->s.gb);
599 av_log(h->s.avctx, AV_LOG_ERROR, "illegal inter cbp\n");
602 h->cbp = cbp_tab[cbp][1];
605 if(h->cbp && !h->qp_fixed)
606 h->qp = (h->qp + get_se_golomb(&h->s.gb)) & 63;
607 for(block=0;block<4;block++)
608 if(h->cbp & (1<<block))
609 decode_residual_block(h, &h->s.gb, inter_dec, 0, h->qp,
610 h->cy + h->luma_scan[block], h->l_stride);
611 decode_residual_chroma(h);
616 /*****************************************************************************
620 ****************************************************************************/
622 static inline void set_mv_intra(AVSContext *h) {
623 h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
624 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
625 h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
626 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
627 if(h->pic_type != AV_PICTURE_TYPE_B)
628 h->col_type_base[h->mbidx] = I_8X8;
631 static int decode_mb_i(AVSContext *h, int cbp_code) {
632 GetBitContext *gb = &h->s.gb;
633 unsigned pred_mode_uv;
636 uint8_t *left = NULL;
641 /* get intra prediction modes from stream */
642 for(block=0;block<4;block++) {
644 int pos = scan3x3[block];
646 nA = h->pred_mode_Y[pos-1];
647 nB = h->pred_mode_Y[pos-3];
648 predpred = FFMIN(nA,nB);
649 if(predpred == NOT_AVAIL) // if either is not available
650 predpred = INTRA_L_LP;
652 int rem_mode= get_bits(gb, 2);
653 predpred = rem_mode + (rem_mode >= predpred);
655 h->pred_mode_Y[pos] = predpred;
657 pred_mode_uv = get_ue_golomb(gb);
658 if(pred_mode_uv > 6) {
659 av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
662 ff_cavs_modify_mb_i(h, &pred_mode_uv);
664 /* get coded block pattern */
665 if(h->pic_type == AV_PICTURE_TYPE_I)
666 cbp_code = get_ue_golomb(gb);
668 av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra cbp\n");
671 h->cbp = cbp_tab[cbp_code][0];
672 if(h->cbp && !h->qp_fixed)
673 h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
675 /* luma intra prediction interleaved with residual decode/transform/add */
676 for(block=0;block<4;block++) {
677 d = h->cy + h->luma_scan[block];
678 ff_cavs_load_intra_pred_luma(h, top, &left, block);
679 h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
680 (d, top, left, h->l_stride);
681 if(h->cbp & (1<<block))
682 decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
685 /* chroma intra prediction */
686 ff_cavs_load_intra_pred_chroma(h);
687 h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx*10],
688 h->left_border_u, h->c_stride);
689 h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx*10],
690 h->left_border_v, h->c_stride);
692 decode_residual_chroma(h);
693 ff_cavs_filter(h,I_8X8);
698 static inline void set_intra_mode_default(AVSContext *h) {
699 if(h->stream_revision > 0) {
700 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
701 h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = NOT_AVAIL;
703 h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
704 h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = INTRA_L_LP;
708 static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type) {
709 GetBitContext *gb = &h->s.gb;
715 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
718 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
719 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16,ref[0]);
722 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
723 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
724 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
725 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
728 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
729 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
730 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
731 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, ref[1]);
734 ref[0] = h->ref_flag ? 0 : get_bits1(gb);
735 ref[1] = h->ref_flag ? 0 : get_bits1(gb);
736 ref[2] = h->ref_flag ? 0 : get_bits1(gb);
737 ref[3] = h->ref_flag ? 0 : get_bits1(gb);
738 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
739 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
740 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
741 ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
743 ff_cavs_inter(h, mb_type);
744 set_intra_mode_default(h);
746 if(mb_type != P_SKIP)
747 decode_residual_inter(h);
748 ff_cavs_filter(h,mb_type);
749 h->col_type_base[h->mbidx] = mb_type;
752 static void decode_mb_b(AVSContext *h, enum cavs_mb mb_type) {
754 enum cavs_sub_mb sub_type[4];
760 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
761 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
762 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
763 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
767 if(!h->col_type_base[h->mbidx]) {
768 /* intra MB at co-location, do in-plane prediction */
769 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
770 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
772 /* direct prediction from co-located P MB, block-wise */
773 for(block=0;block<4;block++)
774 mv_pred_direct(h,&h->mv[mv_scan[block]],
775 &h->col_mv[h->mbidx*4 + block]);
778 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
781 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
782 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
785 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
788 for(block=0;block<4;block++)
789 sub_type[block] = get_bits(&h->s.gb,2);
790 for(block=0;block<4;block++) {
791 switch(sub_type[block]) {
793 if(!h->col_type_base[h->mbidx]) {
794 /* intra MB at co-location, do in-plane prediction */
795 ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
796 MV_PRED_BSKIP, BLK_8X8, 1);
797 ff_cavs_mv(h, mv_scan[block]+MV_BWD_OFFS,
798 mv_scan[block]-3+MV_BWD_OFFS,
799 MV_PRED_BSKIP, BLK_8X8, 0);
801 mv_pred_direct(h,&h->mv[mv_scan[block]],
802 &h->col_mv[h->mbidx*4 + block]);
805 ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
806 MV_PRED_MEDIAN, BLK_8X8, 1);
809 ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
810 MV_PRED_MEDIAN, BLK_8X8, 1);
811 mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
815 for(block=0;block<4;block++) {
816 if(sub_type[block] == B_SUB_BWD)
817 ff_cavs_mv(h, mv_scan[block]+MV_BWD_OFFS,
818 mv_scan[block]+MV_BWD_OFFS-3,
819 MV_PRED_MEDIAN, BLK_8X8, 0);
823 av_assert2((mb_type > B_SYM_16X16) && (mb_type < B_8X8));
824 flags = ff_cavs_partition_flags[mb_type];
825 if(mb_type & 1) { /* 16x8 macroblock types */
827 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
829 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
831 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
833 mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
835 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
837 ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
838 } else { /* 8x16 macroblock types */
840 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
842 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
844 ff_cavs_mv(h,MV_FWD_X1,MV_FWD_C2,MV_PRED_TOPRIGHT,BLK_8X16,1);
846 mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
848 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
850 ff_cavs_mv(h,MV_BWD_X1,MV_BWD_C2,MV_PRED_TOPRIGHT,BLK_8X16,0);
853 ff_cavs_inter(h, mb_type);
854 set_intra_mode_default(h);
855 if(mb_type != B_SKIP)
856 decode_residual_inter(h);
857 ff_cavs_filter(h,mb_type);
860 /*****************************************************************************
864 ****************************************************************************/
866 static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) {
868 av_log(h->s.avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
870 if (h->stc >= h->mb_height)
874 h->mbidx = h->mby*h->mb_width;
876 /* mark top macroblocks as unavailable */
877 h->flags &= ~(B_AVAIL|C_AVAIL);
878 if((h->mby == 0) && (!h->qp_fixed)){
879 h->qp_fixed = get_bits1(gb);
880 h->qp = get_bits(gb,6);
882 /* inter frame or second slice can have weighting params */
883 if((h->pic_type != AV_PICTURE_TYPE_I) || (!h->pic_structure && h->mby >= h->mb_width/2))
884 if(get_bits1(gb)) { //slice_weighting_flag
885 av_log(h->s.avctx, AV_LOG_ERROR,
886 "weighted prediction not yet supported\n");
891 static inline int check_for_slice(AVSContext *h) {
892 GetBitContext *gb = &h->s.gb;
897 align = (-get_bits_count(gb)) & 7;
898 /* check for stuffing byte */
899 if(!align && (show_bits(gb,8) == 0x80))
901 if((show_bits_long(gb,24+align) & 0xFFFFFF) == 0x000001) {
902 skip_bits_long(gb,24+align);
903 h->stc = get_bits(gb,8);
904 if (h->stc >= h->mb_height)
906 decode_slice_header(h,gb);
912 /*****************************************************************************
916 ****************************************************************************/
918 static int decode_pic(AVSContext *h) {
919 MpegEncContext *s = &h->s;
921 enum cavs_mb mb_type;
923 if (!s->context_initialized) {
924 s->avctx->idct_algo = FF_IDCT_CAVS;
925 if (ff_MPV_common_init(s) < 0)
927 ff_init_scantable(s->dsp.idct_permutation,&h->scantable,ff_zigzag_direct);
929 skip_bits(&s->gb,16);//bbv_dwlay
930 if(h->stc == PIC_PB_START_CODE) {
931 h->pic_type = get_bits(&s->gb,2) + AV_PICTURE_TYPE_I;
932 if(h->pic_type > AV_PICTURE_TYPE_B) {
933 av_log(s->avctx, AV_LOG_ERROR, "illegal picture type\n");
936 /* make sure we have the reference frames we need */
937 if(!h->DPB[0].f.data[0] ||
938 (!h->DPB[1].f.data[0] && h->pic_type == AV_PICTURE_TYPE_B))
941 h->pic_type = AV_PICTURE_TYPE_I;
942 if(get_bits1(&s->gb))
943 skip_bits(&s->gb,24);//time_code
944 /* old sample clips were all progressive and no low_delay,
945 bump stream revision if detected otherwise */
946 if (s->low_delay || !(show_bits(&s->gb,9) & 1))
947 h->stream_revision = 1;
948 /* similarly test top_field_first and repeat_first_field */
949 else if(show_bits(&s->gb,11) & 3)
950 h->stream_revision = 1;
951 if(h->stream_revision > 0)
952 skip_bits(&s->gb,1); //marker_bit
954 /* release last B frame */
955 if(h->picture.f.data[0])
956 s->avctx->release_buffer(s->avctx, &h->picture.f);
958 s->avctx->get_buffer(s->avctx, &h->picture.f);
960 h->picture.poc = get_bits(&s->gb,8)*2;
962 /* get temporal distances and MV scaling factors */
963 if(h->pic_type != AV_PICTURE_TYPE_B) {
964 h->dist[0] = (h->picture.poc - h->DPB[0].poc + 512) % 512;
966 h->dist[0] = (h->DPB[0].poc - h->picture.poc + 512) % 512;
968 h->dist[1] = (h->picture.poc - h->DPB[1].poc + 512) % 512;
969 h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
970 h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
971 if(h->pic_type == AV_PICTURE_TYPE_B) {
972 h->sym_factor = h->dist[0]*h->scale_den[1];
974 h->direct_den[0] = h->dist[0] ? 16384/h->dist[0] : 0;
975 h->direct_den[1] = h->dist[1] ? 16384/h->dist[1] : 0;
979 get_ue_golomb(&s->gb); //bbv_check_times
980 h->progressive = get_bits1(&s->gb);
981 h->pic_structure = 1;
983 h->pic_structure = get_bits1(&s->gb);
984 if(!h->pic_structure && h->stc == PIC_PB_START_CODE)
985 skip_bits1(&s->gb); //advanced_pred_mode_disable
986 skip_bits1(&s->gb); //top_field_first
987 skip_bits1(&s->gb); //repeat_first_field
988 h->qp_fixed = get_bits1(&s->gb);
989 h->qp = get_bits(&s->gb,6);
990 if(h->pic_type == AV_PICTURE_TYPE_I) {
991 if(!h->progressive && !h->pic_structure)
992 skip_bits1(&s->gb);//what is this?
993 skip_bits(&s->gb,4); //reserved bits
995 if(!(h->pic_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
996 h->ref_flag = get_bits1(&s->gb);
997 skip_bits(&s->gb,4); //reserved bits
998 h->skip_mode_flag = get_bits1(&s->gb);
1000 h->loop_filter_disable = get_bits1(&s->gb);
1001 if(!h->loop_filter_disable && get_bits1(&s->gb)) {
1002 h->alpha_offset = get_se_golomb(&s->gb);
1003 h->beta_offset = get_se_golomb(&s->gb);
1005 h->alpha_offset = h->beta_offset = 0;
1007 if(h->pic_type == AV_PICTURE_TYPE_I) {
1011 } while(ff_cavs_next_mb(h));
1012 } else if(h->pic_type == AV_PICTURE_TYPE_P) {
1014 if(check_for_slice(h))
1016 if(h->skip_mode_flag && (skip_count < 0))
1017 skip_count = get_ue_golomb(&s->gb);
1018 if(h->skip_mode_flag && skip_count--) {
1019 decode_mb_p(h,P_SKIP);
1021 mb_type = get_ue_golomb(&s->gb) + P_SKIP + h->skip_mode_flag;
1023 decode_mb_i(h, mb_type - P_8X8 - 1);
1025 decode_mb_p(h,mb_type);
1027 } while(ff_cavs_next_mb(h));
1028 } else { /* AV_PICTURE_TYPE_B */
1030 if(check_for_slice(h))
1032 if(h->skip_mode_flag && (skip_count < 0))
1033 skip_count = get_ue_golomb(&s->gb);
1034 if(h->skip_mode_flag && skip_count--) {
1035 decode_mb_b(h,B_SKIP);
1037 mb_type = get_ue_golomb(&s->gb) + B_SKIP + h->skip_mode_flag;
1039 decode_mb_i(h, mb_type - B_8X8 - 1);
1041 decode_mb_b(h,mb_type);
1043 } while(ff_cavs_next_mb(h));
1045 if(h->pic_type != AV_PICTURE_TYPE_B) {
1046 if(h->DPB[1].f.data[0])
1047 s->avctx->release_buffer(s->avctx, &h->DPB[1].f);
1048 h->DPB[1] = h->DPB[0];
1049 h->DPB[0] = h->picture;
1050 memset(&h->picture,0,sizeof(Picture));
1055 /*****************************************************************************
1057 * headers and interface
1059 ****************************************************************************/
1061 static int decode_seq_header(AVSContext *h) {
1062 MpegEncContext *s = &h->s;
1063 int frame_rate_code;
1066 h->profile = get_bits(&s->gb,8);
1067 h->level = get_bits(&s->gb,8);
1068 skip_bits1(&s->gb); //progressive sequence
1069 width = get_bits(&s->gb,14);
1070 height = get_bits(&s->gb,14);
1071 if ((s->width || s->height) && (s->width != width || s->height != height)) {
1072 av_log_missing_feature(s, "Width/height changing in CAVS is", 0);
1075 if (width <= 0 || height <= 0) {
1076 av_log(s, AV_LOG_ERROR, "Dimensions invalid\n");
1077 return AVERROR_INVALIDDATA;
1081 skip_bits(&s->gb,2); //chroma format
1082 skip_bits(&s->gb,3); //sample_precision
1083 h->aspect_ratio = get_bits(&s->gb,4);
1084 frame_rate_code = get_bits(&s->gb,4);
1085 skip_bits(&s->gb,18);//bit_rate_lower
1086 skip_bits1(&s->gb); //marker_bit
1087 skip_bits(&s->gb,12);//bit_rate_upper
1088 s->low_delay = get_bits1(&s->gb);
1089 h->mb_width = (s->width + 15) >> 4;
1090 h->mb_height = (s->height + 15) >> 4;
1091 h->s.avctx->time_base.den = avpriv_frame_rate_tab[frame_rate_code].num;
1092 h->s.avctx->time_base.num = avpriv_frame_rate_tab[frame_rate_code].den;
1093 h->s.avctx->width = s->width;
1094 h->s.avctx->height = s->height;
1096 ff_cavs_init_top_lines(h);
1100 static void cavs_flush(AVCodecContext * avctx) {
1101 AVSContext *h = avctx->priv_data;
1102 h->got_keyframe = 0;
1105 static int cavs_decode_frame(AVCodecContext * avctx,void *data, int *data_size,
1107 const uint8_t *buf = avpkt->data;
1108 int buf_size = avpkt->size;
1109 AVSContext *h = avctx->priv_data;
1110 MpegEncContext *s = &h->s;
1112 const uint8_t *buf_end;
1113 const uint8_t *buf_ptr;
1114 AVFrame *picture = data;
1119 if (buf_size == 0) {
1120 if (!s->low_delay && h->DPB[0].f.data[0]) {
1121 *data_size = sizeof(AVPicture);
1122 *picture = h->DPB[0].f;
1123 memset(&h->DPB[0], 0, sizeof(h->DPB[0]));
1129 buf_end = buf + buf_size;
1131 buf_ptr = avpriv_mpv_find_start_code(buf_ptr,buf_end, &stc);
1132 if((stc & 0xFFFFFE00) || buf_ptr == buf_end)
1133 return FFMAX(0, buf_ptr - buf - s->parse_context.last_index);
1134 input_size = (buf_end - buf_ptr)*8;
1136 case CAVS_START_CODE:
1137 init_get_bits(&s->gb, buf_ptr, input_size);
1138 decode_seq_header(h);
1140 case PIC_I_START_CODE:
1141 if(!h->got_keyframe) {
1142 if(h->DPB[0].f.data[0])
1143 avctx->release_buffer(avctx, &h->DPB[0].f);
1144 if(h->DPB[1].f.data[0])
1145 avctx->release_buffer(avctx, &h->DPB[1].f);
1146 h->got_keyframe = 1;
1148 case PIC_PB_START_CODE:
1150 if(!h->got_keyframe)
1154 init_get_bits(&s->gb, buf_ptr, input_size);
1158 *data_size = sizeof(AVPicture);
1159 if(h->pic_type != AV_PICTURE_TYPE_B) {
1160 if(h->DPB[1].f.data[0]) {
1161 *picture = h->DPB[1].f;
1166 *picture = h->picture.f;
1168 case EXT_START_CODE:
1169 //mpeg_decode_extension(avctx,buf_ptr, input_size);
1171 case USER_START_CODE:
1172 //mpeg_decode_user_data(avctx,buf_ptr, input_size);
1175 if (stc <= SLICE_MAX_START_CODE) {
1176 init_get_bits(&s->gb, buf_ptr, input_size);
1177 decode_slice_header(h, &s->gb);
1184 AVCodec ff_cavs_decoder = {
1186 .type = AVMEDIA_TYPE_VIDEO,
1187 .id = AV_CODEC_ID_CAVS,
1188 .priv_data_size = sizeof(AVSContext),
1189 .init = ff_cavs_init,
1190 .close = ff_cavs_end,
1191 .decode = cavs_decode_frame,
1192 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
1193 .flush = cavs_flush,
1194 .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),