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1 | /* |
2 | * LucasArts Smush video decoder | |
3 | * Copyright (c) 2006 Cyril Zorin | |
4 | * Copyright (c) 2011 Konstantin Shishkov | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include "libavutil/avassert.h" | |
24 | #include "libavutil/bswap.h" | |
25 | #include "libavutil/imgutils.h" | |
26 | ||
27 | #include "avcodec.h" | |
28 | #include "bytestream.h" | |
29 | #include "copy_block.h" | |
30 | #include "internal.h" | |
31 | ||
32 | #define NGLYPHS 256 | |
33 | #define GLYPH_COORD_VECT_SIZE 16 | |
34 | #define PALETTE_SIZE 256 | |
35 | #define PALETTE_DELTA 768 | |
36 | ||
37 | static const int8_t glyph4_x[GLYPH_COORD_VECT_SIZE] = { | |
38 | 0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1 | |
39 | }; | |
40 | ||
41 | static const int8_t glyph4_y[GLYPH_COORD_VECT_SIZE] = { | |
42 | 0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2 | |
43 | }; | |
44 | ||
45 | static const int8_t glyph8_x[GLYPH_COORD_VECT_SIZE] = { | |
46 | 0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0 | |
47 | }; | |
48 | ||
49 | static const int8_t glyph8_y[GLYPH_COORD_VECT_SIZE] = { | |
50 | 0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1 | |
51 | }; | |
52 | ||
53 | static const int8_t motion_vectors[256][2] = { | |
54 | { 0, 0 }, { -1, -43 }, { 6, -43 }, { -9, -42 }, { 13, -41 }, | |
55 | { -16, -40 }, { 19, -39 }, { -23, -36 }, { 26, -34 }, { -2, -33 }, | |
56 | { 4, -33 }, { -29, -32 }, { -9, -32 }, { 11, -31 }, { -16, -29 }, | |
57 | { 32, -29 }, { 18, -28 }, { -34, -26 }, { -22, -25 }, { -1, -25 }, | |
58 | { 3, -25 }, { -7, -24 }, { 8, -24 }, { 24, -23 }, { 36, -23 }, | |
59 | { -12, -22 }, { 13, -21 }, { -38, -20 }, { 0, -20 }, { -27, -19 }, | |
60 | { -4, -19 }, { 4, -19 }, { -17, -18 }, { -8, -17 }, { 8, -17 }, | |
61 | { 18, -17 }, { 28, -17 }, { 39, -17 }, { -12, -15 }, { 12, -15 }, | |
62 | { -21, -14 }, { -1, -14 }, { 1, -14 }, { -41, -13 }, { -5, -13 }, | |
63 | { 5, -13 }, { 21, -13 }, { -31, -12 }, { -15, -11 }, { -8, -11 }, | |
64 | { 8, -11 }, { 15, -11 }, { -2, -10 }, { 1, -10 }, { 31, -10 }, | |
65 | { -23, -9 }, { -11, -9 }, { -5, -9 }, { 4, -9 }, { 11, -9 }, | |
66 | { 42, -9 }, { 6, -8 }, { 24, -8 }, { -18, -7 }, { -7, -7 }, | |
67 | { -3, -7 }, { -1, -7 }, { 2, -7 }, { 18, -7 }, { -43, -6 }, | |
68 | { -13, -6 }, { -4, -6 }, { 4, -6 }, { 8, -6 }, { -33, -5 }, | |
69 | { -9, -5 }, { -2, -5 }, { 0, -5 }, { 2, -5 }, { 5, -5 }, | |
70 | { 13, -5 }, { -25, -4 }, { -6, -4 }, { -3, -4 }, { 3, -4 }, | |
71 | { 9, -4 }, { -19, -3 }, { -7, -3 }, { -4, -3 }, { -2, -3 }, | |
72 | { -1, -3 }, { 0, -3 }, { 1, -3 }, { 2, -3 }, { 4, -3 }, | |
73 | { 6, -3 }, { 33, -3 }, { -14, -2 }, { -10, -2 }, { -5, -2 }, | |
74 | { -3, -2 }, { -2, -2 }, { -1, -2 }, { 0, -2 }, { 1, -2 }, | |
75 | { 2, -2 }, { 3, -2 }, { 5, -2 }, { 7, -2 }, { 14, -2 }, | |
76 | { 19, -2 }, { 25, -2 }, { 43, -2 }, { -7, -1 }, { -3, -1 }, | |
77 | { -2, -1 }, { -1, -1 }, { 0, -1 }, { 1, -1 }, { 2, -1 }, | |
78 | { 3, -1 }, { 10, -1 }, { -5, 0 }, { -3, 0 }, { -2, 0 }, | |
79 | { -1, 0 }, { 1, 0 }, { 2, 0 }, { 3, 0 }, { 5, 0 }, | |
80 | { 7, 0 }, { -10, 1 }, { -7, 1 }, { -3, 1 }, { -2, 1 }, | |
81 | { -1, 1 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1 }, | |
82 | { -43, 2 }, { -25, 2 }, { -19, 2 }, { -14, 2 }, { -5, 2 }, | |
83 | { -3, 2 }, { -2, 2 }, { -1, 2 }, { 0, 2 }, { 1, 2 }, | |
84 | { 2, 2 }, { 3, 2 }, { 5, 2 }, { 7, 2 }, { 10, 2 }, | |
85 | { 14, 2 }, { -33, 3 }, { -6, 3 }, { -4, 3 }, { -2, 3 }, | |
86 | { -1, 3 }, { 0, 3 }, { 1, 3 }, { 2, 3 }, { 4, 3 }, | |
87 | { 19, 3 }, { -9, 4 }, { -3, 4 }, { 3, 4 }, { 7, 4 }, | |
88 | { 25, 4 }, { -13, 5 }, { -5, 5 }, { -2, 5 }, { 0, 5 }, | |
89 | { 2, 5 }, { 5, 5 }, { 9, 5 }, { 33, 5 }, { -8, 6 }, | |
90 | { -4, 6 }, { 4, 6 }, { 13, 6 }, { 43, 6 }, { -18, 7 }, | |
91 | { -2, 7 }, { 0, 7 }, { 2, 7 }, { 7, 7 }, { 18, 7 }, | |
92 | { -24, 8 }, { -6, 8 }, { -42, 9 }, { -11, 9 }, { -4, 9 }, | |
93 | { 5, 9 }, { 11, 9 }, { 23, 9 }, { -31, 10 }, { -1, 10 }, | |
94 | { 2, 10 }, { -15, 11 }, { -8, 11 }, { 8, 11 }, { 15, 11 }, | |
95 | { 31, 12 }, { -21, 13 }, { -5, 13 }, { 5, 13 }, { 41, 13 }, | |
96 | { -1, 14 }, { 1, 14 }, { 21, 14 }, { -12, 15 }, { 12, 15 }, | |
97 | { -39, 17 }, { -28, 17 }, { -18, 17 }, { -8, 17 }, { 8, 17 }, | |
98 | { 17, 18 }, { -4, 19 }, { 0, 19 }, { 4, 19 }, { 27, 19 }, | |
99 | { 38, 20 }, { -13, 21 }, { 12, 22 }, { -36, 23 }, { -24, 23 }, | |
100 | { -8, 24 }, { 7, 24 }, { -3, 25 }, { 1, 25 }, { 22, 25 }, | |
101 | { 34, 26 }, { -18, 28 }, { -32, 29 }, { 16, 29 }, { -11, 31 }, | |
102 | { 9, 32 }, { 29, 32 }, { -4, 33 }, { 2, 33 }, { -26, 34 }, | |
103 | { 23, 36 }, { -19, 39 }, { 16, 40 }, { -13, 41 }, { 9, 42 }, | |
104 | { -6, 43 }, { 1, 43 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, | |
105 | }; | |
106 | ||
107 | static const int8_t c37_mv[] = { | |
108 | 0, 0, 1, 0, 2, 0, 3, 0, 5, 0, | |
109 | 8, 0, 13, 0, 21, 0, -1, 0, -2, 0, | |
110 | -3, 0, -5, 0, -8, 0, -13, 0, -17, 0, | |
111 | -21, 0, 0, 1, 1, 1, 2, 1, 3, 1, | |
112 | 5, 1, 8, 1, 13, 1, 21, 1, -1, 1, | |
113 | -2, 1, -3, 1, -5, 1, -8, 1, -13, 1, | |
114 | -17, 1, -21, 1, 0, 2, 1, 2, 2, 2, | |
115 | 3, 2, 5, 2, 8, 2, 13, 2, 21, 2, | |
116 | -1, 2, -2, 2, -3, 2, -5, 2, -8, 2, | |
117 | -13, 2, -17, 2, -21, 2, 0, 3, 1, 3, | |
118 | 2, 3, 3, 3, 5, 3, 8, 3, 13, 3, | |
119 | 21, 3, -1, 3, -2, 3, -3, 3, -5, 3, | |
120 | -8, 3, -13, 3, -17, 3, -21, 3, 0, 5, | |
121 | 1, 5, 2, 5, 3, 5, 5, 5, 8, 5, | |
122 | 13, 5, 21, 5, -1, 5, -2, 5, -3, 5, | |
123 | -5, 5, -8, 5, -13, 5, -17, 5, -21, 5, | |
124 | 0, 8, 1, 8, 2, 8, 3, 8, 5, 8, | |
125 | 8, 8, 13, 8, 21, 8, -1, 8, -2, 8, | |
126 | -3, 8, -5, 8, -8, 8, -13, 8, -17, 8, | |
127 | -21, 8, 0, 13, 1, 13, 2, 13, 3, 13, | |
128 | 5, 13, 8, 13, 13, 13, 21, 13, -1, 13, | |
129 | -2, 13, -3, 13, -5, 13, -8, 13, -13, 13, | |
130 | -17, 13, -21, 13, 0, 21, 1, 21, 2, 21, | |
131 | 3, 21, 5, 21, 8, 21, 13, 21, 21, 21, | |
132 | -1, 21, -2, 21, -3, 21, -5, 21, -8, 21, | |
133 | -13, 21, -17, 21, -21, 21, 0, -1, 1, -1, | |
134 | 2, -1, 3, -1, 5, -1, 8, -1, 13, -1, | |
135 | 21, -1, -1, -1, -2, -1, -3, -1, -5, -1, | |
136 | -8, -1, -13, -1, -17, -1, -21, -1, 0, -2, | |
137 | 1, -2, 2, -2, 3, -2, 5, -2, 8, -2, | |
138 | 13, -2, 21, -2, -1, -2, -2, -2, -3, -2, | |
139 | -5, -2, -8, -2, -13, -2, -17, -2, -21, -2, | |
140 | 0, -3, 1, -3, 2, -3, 3, -3, 5, -3, | |
141 | 8, -3, 13, -3, 21, -3, -1, -3, -2, -3, | |
142 | -3, -3, -5, -3, -8, -3, -13, -3, -17, -3, | |
143 | -21, -3, 0, -5, 1, -5, 2, -5, 3, -5, | |
144 | 5, -5, 8, -5, 13, -5, 21, -5, -1, -5, | |
145 | -2, -5, -3, -5, -5, -5, -8, -5, -13, -5, | |
146 | -17, -5, -21, -5, 0, -8, 1, -8, 2, -8, | |
147 | 3, -8, 5, -8, 8, -8, 13, -8, 21, -8, | |
148 | -1, -8, -2, -8, -3, -8, -5, -8, -8, -8, | |
149 | -13, -8, -17, -8, -21, -8, 0, -13, 1, -13, | |
150 | 2, -13, 3, -13, 5, -13, 8, -13, 13, -13, | |
151 | 21, -13, -1, -13, -2, -13, -3, -13, -5, -13, | |
152 | -8, -13, -13, -13, -17, -13, -21, -13, 0, -17, | |
153 | 1, -17, 2, -17, 3, -17, 5, -17, 8, -17, | |
154 | 13, -17, 21, -17, -1, -17, -2, -17, -3, -17, | |
155 | -5, -17, -8, -17, -13, -17, -17, -17, -21, -17, | |
156 | 0, -21, 1, -21, 2, -21, 3, -21, 5, -21, | |
157 | 8, -21, 13, -21, 21, -21, -1, -21, -2, -21, | |
158 | -3, -21, -5, -21, -8, -21, -13, -21, -17, -21, | |
159 | 0, 0, -8, -29, 8, -29, -18, -25, 17, -25, | |
160 | 0, -23, -6, -22, 6, -22, -13, -19, 12, -19, | |
161 | 0, -18, 25, -18, -25, -17, -5, -17, 5, -17, | |
162 | -10, -15, 10, -15, 0, -14, -4, -13, 4, -13, | |
163 | 19, -13, -19, -12, -8, -11, -2, -11, 0, -11, | |
164 | 2, -11, 8, -11, -15, -10, -4, -10, 4, -10, | |
165 | 15, -10, -6, -9, -1, -9, 1, -9, 6, -9, | |
166 | -29, -8, -11, -8, -8, -8, -3, -8, 3, -8, | |
167 | 8, -8, 11, -8, 29, -8, -5, -7, -2, -7, | |
168 | 0, -7, 2, -7, 5, -7, -22, -6, -9, -6, | |
169 | -6, -6, -3, -6, -1, -6, 1, -6, 3, -6, | |
170 | 6, -6, 9, -6, 22, -6, -17, -5, -7, -5, | |
171 | -4, -5, -2, -5, 0, -5, 2, -5, 4, -5, | |
172 | 7, -5, 17, -5, -13, -4, -10, -4, -5, -4, | |
173 | -3, -4, -1, -4, 0, -4, 1, -4, 3, -4, | |
174 | 5, -4, 10, -4, 13, -4, -8, -3, -6, -3, | |
175 | -4, -3, -3, -3, -2, -3, -1, -3, 0, -3, | |
176 | 1, -3, 2, -3, 4, -3, 6, -3, 8, -3, | |
177 | -11, -2, -7, -2, -5, -2, -3, -2, -2, -2, | |
178 | -1, -2, 0, -2, 1, -2, 2, -2, 3, -2, | |
179 | 5, -2, 7, -2, 11, -2, -9, -1, -6, -1, | |
180 | -4, -1, -3, -1, -2, -1, -1, -1, 0, -1, | |
181 | 1, -1, 2, -1, 3, -1, 4, -1, 6, -1, | |
182 | 9, -1, -31, 0, -23, 0, -18, 0, -14, 0, | |
183 | -11, 0, -7, 0, -5, 0, -4, 0, -3, 0, | |
184 | -2, 0, -1, 0, 0, -31, 1, 0, 2, 0, | |
185 | 3, 0, 4, 0, 5, 0, 7, 0, 11, 0, | |
186 | 14, 0, 18, 0, 23, 0, 31, 0, -9, 1, | |
187 | -6, 1, -4, 1, -3, 1, -2, 1, -1, 1, | |
188 | 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, | |
189 | 6, 1, 9, 1, -11, 2, -7, 2, -5, 2, | |
190 | -3, 2, -2, 2, -1, 2, 0, 2, 1, 2, | |
191 | 2, 2, 3, 2, 5, 2, 7, 2, 11, 2, | |
192 | -8, 3, -6, 3, -4, 3, -2, 3, -1, 3, | |
193 | 0, 3, 1, 3, 2, 3, 3, 3, 4, 3, | |
194 | 6, 3, 8, 3, -13, 4, -10, 4, -5, 4, | |
195 | -3, 4, -1, 4, 0, 4, 1, 4, 3, 4, | |
196 | 5, 4, 10, 4, 13, 4, -17, 5, -7, 5, | |
197 | -4, 5, -2, 5, 0, 5, 2, 5, 4, 5, | |
198 | 7, 5, 17, 5, -22, 6, -9, 6, -6, 6, | |
199 | -3, 6, -1, 6, 1, 6, 3, 6, 6, 6, | |
200 | 9, 6, 22, 6, -5, 7, -2, 7, 0, 7, | |
201 | 2, 7, 5, 7, -29, 8, -11, 8, -8, 8, | |
202 | -3, 8, 3, 8, 8, 8, 11, 8, 29, 8, | |
203 | -6, 9, -1, 9, 1, 9, 6, 9, -15, 10, | |
204 | -4, 10, 4, 10, 15, 10, -8, 11, -2, 11, | |
205 | 0, 11, 2, 11, 8, 11, 19, 12, -19, 13, | |
206 | -4, 13, 4, 13, 0, 14, -10, 15, 10, 15, | |
207 | -5, 17, 5, 17, 25, 17, -25, 18, 0, 18, | |
208 | -12, 19, 13, 19, -6, 22, 6, 22, 0, 23, | |
209 | -17, 25, 18, 25, -8, 29, 8, 29, 0, 31, | |
210 | 0, 0, -6, -22, 6, -22, -13, -19, 12, -19, | |
211 | 0, -18, -5, -17, 5, -17, -10, -15, 10, -15, | |
212 | 0, -14, -4, -13, 4, -13, 19, -13, -19, -12, | |
213 | -8, -11, -2, -11, 0, -11, 2, -11, 8, -11, | |
214 | -15, -10, -4, -10, 4, -10, 15, -10, -6, -9, | |
215 | -1, -9, 1, -9, 6, -9, -11, -8, -8, -8, | |
216 | -3, -8, 0, -8, 3, -8, 8, -8, 11, -8, | |
217 | -5, -7, -2, -7, 0, -7, 2, -7, 5, -7, | |
218 | -22, -6, -9, -6, -6, -6, -3, -6, -1, -6, | |
219 | 1, -6, 3, -6, 6, -6, 9, -6, 22, -6, | |
220 | -17, -5, -7, -5, -4, -5, -2, -5, -1, -5, | |
221 | 0, -5, 1, -5, 2, -5, 4, -5, 7, -5, | |
222 | 17, -5, -13, -4, -10, -4, -5, -4, -3, -4, | |
223 | -2, -4, -1, -4, 0, -4, 1, -4, 2, -4, | |
224 | 3, -4, 5, -4, 10, -4, 13, -4, -8, -3, | |
225 | -6, -3, -4, -3, -3, -3, -2, -3, -1, -3, | |
226 | 0, -3, 1, -3, 2, -3, 3, -3, 4, -3, | |
227 | 6, -3, 8, -3, -11, -2, -7, -2, -5, -2, | |
228 | -4, -2, -3, -2, -2, -2, -1, -2, 0, -2, | |
229 | 1, -2, 2, -2, 3, -2, 4, -2, 5, -2, | |
230 | 7, -2, 11, -2, -9, -1, -6, -1, -5, -1, | |
231 | -4, -1, -3, -1, -2, -1, -1, -1, 0, -1, | |
232 | 1, -1, 2, -1, 3, -1, 4, -1, 5, -1, | |
233 | 6, -1, 9, -1, -23, 0, -18, 0, -14, 0, | |
234 | -11, 0, -7, 0, -5, 0, -4, 0, -3, 0, | |
235 | -2, 0, -1, 0, 0, -23, 1, 0, 2, 0, | |
236 | 3, 0, 4, 0, 5, 0, 7, 0, 11, 0, | |
237 | 14, 0, 18, 0, 23, 0, -9, 1, -6, 1, | |
238 | -5, 1, -4, 1, -3, 1, -2, 1, -1, 1, | |
239 | 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, | |
240 | 5, 1, 6, 1, 9, 1, -11, 2, -7, 2, | |
241 | -5, 2, -4, 2, -3, 2, -2, 2, -1, 2, | |
242 | 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, | |
243 | 5, 2, 7, 2, 11, 2, -8, 3, -6, 3, | |
244 | -4, 3, -3, 3, -2, 3, -1, 3, 0, 3, | |
245 | 1, 3, 2, 3, 3, 3, 4, 3, 6, 3, | |
246 | 8, 3, -13, 4, -10, 4, -5, 4, -3, 4, | |
247 | -2, 4, -1, 4, 0, 4, 1, 4, 2, 4, | |
248 | 3, 4, 5, 4, 10, 4, 13, 4, -17, 5, | |
249 | -7, 5, -4, 5, -2, 5, -1, 5, 0, 5, | |
250 | 1, 5, 2, 5, 4, 5, 7, 5, 17, 5, | |
251 | -22, 6, -9, 6, -6, 6, -3, 6, -1, 6, | |
252 | 1, 6, 3, 6, 6, 6, 9, 6, 22, 6, | |
253 | -5, 7, -2, 7, 0, 7, 2, 7, 5, 7, | |
254 | -11, 8, -8, 8, -3, 8, 0, 8, 3, 8, | |
255 | 8, 8, 11, 8, -6, 9, -1, 9, 1, 9, | |
256 | 6, 9, -15, 10, -4, 10, 4, 10, 15, 10, | |
257 | -8, 11, -2, 11, 0, 11, 2, 11, 8, 11, | |
258 | 19, 12, -19, 13, -4, 13, 4, 13, 0, 14, | |
259 | -10, 15, 10, 15, -5, 17, 5, 17, 0, 18, | |
260 | -12, 19, 13, 19, -6, 22, 6, 22, 0, 23, | |
261 | }; | |
262 | ||
263 | typedef struct SANMVideoContext { | |
264 | AVCodecContext *avctx; | |
265 | GetByteContext gb; | |
266 | ||
267 | int version, subversion; | |
268 | uint32_t pal[PALETTE_SIZE]; | |
269 | int16_t delta_pal[PALETTE_DELTA]; | |
270 | ||
271 | int pitch; | |
272 | int width, height; | |
273 | int aligned_width, aligned_height; | |
274 | int prev_seq; | |
275 | ||
276 | AVFrame *frame; | |
277 | uint16_t *frm0, *frm1, *frm2; | |
278 | uint8_t *stored_frame; | |
279 | uint32_t frm0_size, frm1_size, frm2_size; | |
280 | uint32_t stored_frame_size; | |
281 | ||
282 | uint8_t *rle_buf; | |
283 | unsigned int rle_buf_size; | |
284 | ||
285 | int rotate_code; | |
286 | ||
287 | long npixels, buf_size; | |
288 | ||
289 | uint16_t codebook[256]; | |
290 | uint16_t small_codebook[4]; | |
291 | ||
292 | int8_t p4x4glyphs[NGLYPHS][16]; | |
293 | int8_t p8x8glyphs[NGLYPHS][64]; | |
294 | } SANMVideoContext; | |
295 | ||
296 | typedef struct SANMFrameHeader { | |
297 | int seq_num, codec, rotate_code, rle_output_size; | |
298 | ||
299 | uint16_t bg_color; | |
300 | uint32_t width, height; | |
301 | } SANMFrameHeader; | |
302 | ||
303 | enum GlyphEdge { | |
304 | LEFT_EDGE, | |
305 | TOP_EDGE, | |
306 | RIGHT_EDGE, | |
307 | BOTTOM_EDGE, | |
308 | NO_EDGE | |
309 | }; | |
310 | ||
311 | enum GlyphDir { | |
312 | DIR_LEFT, | |
313 | DIR_UP, | |
314 | DIR_RIGHT, | |
315 | DIR_DOWN, | |
316 | NO_DIR | |
317 | }; | |
318 | ||
319 | /** | |
320 | * Return enum GlyphEdge of box where point (x, y) lies. | |
321 | * | |
322 | * @param x x point coordinate | |
323 | * @param y y point coordinate | |
324 | * @param edge_size box width/height. | |
325 | */ | |
326 | static enum GlyphEdge which_edge(int x, int y, int edge_size) | |
327 | { | |
328 | const int edge_max = edge_size - 1; | |
329 | ||
330 | if (!y) | |
331 | return BOTTOM_EDGE; | |
332 | else if (y == edge_max) | |
333 | return TOP_EDGE; | |
334 | else if (!x) | |
335 | return LEFT_EDGE; | |
336 | else if (x == edge_max) | |
337 | return RIGHT_EDGE; | |
338 | else | |
339 | return NO_EDGE; | |
340 | } | |
341 | ||
342 | static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1) | |
343 | { | |
344 | if ((edge0 == LEFT_EDGE && edge1 == RIGHT_EDGE) || | |
345 | (edge1 == LEFT_EDGE && edge0 == RIGHT_EDGE) || | |
346 | (edge0 == BOTTOM_EDGE && edge1 != TOP_EDGE) || | |
347 | (edge1 == BOTTOM_EDGE && edge0 != TOP_EDGE)) | |
348 | return DIR_UP; | |
349 | else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) || | |
350 | (edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE)) | |
351 | return DIR_DOWN; | |
352 | else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) || | |
353 | (edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE)) | |
354 | return DIR_LEFT; | |
355 | else if ((edge0 == TOP_EDGE && edge1 == BOTTOM_EDGE) || | |
356 | (edge1 == TOP_EDGE && edge0 == BOTTOM_EDGE) || | |
357 | (edge0 == RIGHT_EDGE && edge1 != LEFT_EDGE) || | |
358 | (edge1 == RIGHT_EDGE && edge0 != LEFT_EDGE)) | |
359 | return DIR_RIGHT; | |
360 | ||
361 | return NO_DIR; | |
362 | } | |
363 | ||
364 | /* Interpolate two points. */ | |
365 | static void interp_point(int8_t *points, int x0, int y0, int x1, int y1, | |
366 | int pos, int npoints) | |
367 | { | |
368 | if (npoints) { | |
369 | points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints; | |
370 | points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints; | |
371 | } else { | |
372 | points[0] = x0; | |
373 | points[1] = y0; | |
374 | } | |
375 | } | |
376 | ||
377 | /** | |
378 | * Construct glyphs by iterating through vector coordinates. | |
379 | * | |
380 | * @param pglyphs pointer to table where glyphs are stored | |
381 | * @param xvec pointer to x component of vector coordinates | |
382 | * @param yvec pointer to y component of vector coordinates | |
383 | * @param side_length glyph width/height. | |
384 | */ | |
385 | static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec, | |
386 | const int side_length) | |
387 | { | |
388 | const int glyph_size = side_length * side_length; | |
389 | int8_t *pglyph = pglyphs; | |
390 | ||
391 | int i, j; | |
392 | for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) { | |
393 | int x0 = xvec[i]; | |
394 | int y0 = yvec[i]; | |
395 | enum GlyphEdge edge0 = which_edge(x0, y0, side_length); | |
396 | ||
397 | for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) { | |
398 | int x1 = xvec[j]; | |
399 | int y1 = yvec[j]; | |
400 | enum GlyphEdge edge1 = which_edge(x1, y1, side_length); | |
401 | enum GlyphDir dir = which_direction(edge0, edge1); | |
402 | int npoints = FFMAX(FFABS(x1 - x0), FFABS(y1 - y0)); | |
403 | int ipoint; | |
404 | ||
405 | for (ipoint = 0; ipoint <= npoints; ipoint++) { | |
406 | int8_t point[2]; | |
407 | int irow, icol; | |
408 | ||
409 | interp_point(point, x0, y0, x1, y1, ipoint, npoints); | |
410 | ||
411 | switch (dir) { | |
412 | case DIR_UP: | |
413 | for (irow = point[1]; irow >= 0; irow--) | |
414 | pglyph[point[0] + irow * side_length] = 1; | |
415 | break; | |
416 | ||
417 | case DIR_DOWN: | |
418 | for (irow = point[1]; irow < side_length; irow++) | |
419 | pglyph[point[0] + irow * side_length] = 1; | |
420 | break; | |
421 | ||
422 | case DIR_LEFT: | |
423 | for (icol = point[0]; icol >= 0; icol--) | |
424 | pglyph[icol + point[1] * side_length] = 1; | |
425 | break; | |
426 | ||
427 | case DIR_RIGHT: | |
428 | for (icol = point[0]; icol < side_length; icol++) | |
429 | pglyph[icol + point[1] * side_length] = 1; | |
430 | break; | |
431 | } | |
432 | } | |
433 | } | |
434 | } | |
435 | } | |
436 | ||
437 | static void init_sizes(SANMVideoContext *ctx, int width, int height) | |
438 | { | |
439 | ctx->width = width; | |
440 | ctx->height = height; | |
441 | ctx->npixels = width * height; | |
442 | ||
443 | ctx->aligned_width = FFALIGN(width, 8); | |
444 | ctx->aligned_height = FFALIGN(height, 8); | |
445 | ||
446 | ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]); | |
447 | ctx->pitch = width; | |
448 | } | |
449 | ||
450 | static void destroy_buffers(SANMVideoContext *ctx) | |
451 | { | |
452 | av_freep(&ctx->frm0); | |
453 | av_freep(&ctx->frm1); | |
454 | av_freep(&ctx->frm2); | |
455 | av_freep(&ctx->stored_frame); | |
456 | av_freep(&ctx->rle_buf); | |
457 | ctx->frm0_size = | |
458 | ctx->frm1_size = | |
459 | ctx->frm2_size = 0; | |
460 | } | |
461 | ||
462 | static av_cold int init_buffers(SANMVideoContext *ctx) | |
463 | { | |
464 | av_fast_padded_malloc(&ctx->frm0, &ctx->frm0_size, ctx->buf_size); | |
465 | av_fast_padded_malloc(&ctx->frm1, &ctx->frm1_size, ctx->buf_size); | |
466 | av_fast_padded_malloc(&ctx->frm2, &ctx->frm2_size, ctx->buf_size); | |
467 | if (!ctx->version) | |
468 | av_fast_padded_malloc(&ctx->stored_frame, | |
469 | &ctx->stored_frame_size, ctx->buf_size); | |
470 | ||
471 | if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 || | |
472 | (!ctx->stored_frame && !ctx->version)) { | |
473 | destroy_buffers(ctx); | |
474 | return AVERROR(ENOMEM); | |
475 | } | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static void rotate_bufs(SANMVideoContext *ctx, int rotate_code) | |
481 | { | |
482 | if (rotate_code == 2) | |
483 | FFSWAP(uint16_t*, ctx->frm1, ctx->frm2); | |
484 | FFSWAP(uint16_t*, ctx->frm2, ctx->frm0); | |
485 | } | |
486 | ||
487 | static av_cold int decode_init(AVCodecContext *avctx) | |
488 | { | |
489 | SANMVideoContext *ctx = avctx->priv_data; | |
490 | ||
491 | ctx->avctx = avctx; | |
492 | ctx->version = !avctx->extradata_size; | |
493 | ||
494 | avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8; | |
495 | ||
496 | init_sizes(ctx, avctx->width, avctx->height); | |
497 | if (init_buffers(ctx)) { | |
498 | av_log(avctx, AV_LOG_ERROR, "Error allocating buffers.\n"); | |
499 | return AVERROR(ENOMEM); | |
500 | } | |
501 | ||
502 | make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4); | |
503 | make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8); | |
504 | ||
505 | if (!ctx->version) { | |
506 | int i; | |
507 | ||
508 | if (avctx->extradata_size < 1026) { | |
509 | av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n"); | |
510 | return AVERROR_INVALIDDATA; | |
511 | } | |
512 | ||
513 | ctx->subversion = AV_RL16(avctx->extradata); | |
514 | for (i = 0; i < PALETTE_SIZE; i++) | |
515 | ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4); | |
516 | } | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | static av_cold int decode_end(AVCodecContext *avctx) | |
522 | { | |
523 | SANMVideoContext *ctx = avctx->priv_data; | |
524 | ||
525 | destroy_buffers(ctx); | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size) | |
531 | { | |
532 | int opcode, color, run_len, left = out_size; | |
533 | ||
534 | while (left > 0) { | |
535 | opcode = bytestream2_get_byte(&ctx->gb); | |
536 | run_len = (opcode >> 1) + 1; | |
537 | if (run_len > left || bytestream2_get_bytes_left(&ctx->gb) <= 0) | |
538 | return AVERROR_INVALIDDATA; | |
539 | ||
540 | if (opcode & 1) { | |
541 | color = bytestream2_get_byte(&ctx->gb); | |
542 | memset(dst, color, run_len); | |
543 | } else { | |
544 | if (bytestream2_get_bytes_left(&ctx->gb) < run_len) | |
545 | return AVERROR_INVALIDDATA; | |
546 | bytestream2_get_bufferu(&ctx->gb, dst, run_len); | |
547 | } | |
548 | ||
549 | dst += run_len; | |
550 | left -= run_len; | |
551 | } | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static int old_codec1(SANMVideoContext *ctx, int top, | |
557 | int left, int width, int height) | |
558 | { | |
559 | uint8_t *dst = ((uint8_t *)ctx->frm0) + left + top * ctx->pitch; | |
560 | int i, j, len, flag, code, val, pos, end; | |
561 | ||
562 | for (i = 0; i < height; i++) { | |
563 | pos = 0; | |
564 | ||
565 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) | |
566 | return AVERROR_INVALIDDATA; | |
567 | ||
568 | len = bytestream2_get_le16u(&ctx->gb); | |
569 | end = bytestream2_tell(&ctx->gb) + len; | |
570 | ||
571 | while (bytestream2_tell(&ctx->gb) < end) { | |
572 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) | |
573 | return AVERROR_INVALIDDATA; | |
574 | ||
575 | code = bytestream2_get_byteu(&ctx->gb); | |
576 | flag = code & 1; | |
577 | code = (code >> 1) + 1; | |
578 | if (pos + code > width) | |
579 | return AVERROR_INVALIDDATA; | |
580 | if (flag) { | |
581 | val = bytestream2_get_byteu(&ctx->gb); | |
582 | if (val) | |
583 | memset(dst + pos, val, code); | |
584 | pos += code; | |
585 | } else { | |
586 | if (bytestream2_get_bytes_left(&ctx->gb) < code) | |
587 | return AVERROR_INVALIDDATA; | |
588 | for (j = 0; j < code; j++) { | |
589 | val = bytestream2_get_byteu(&ctx->gb); | |
590 | if (val) | |
591 | dst[pos] = val; | |
592 | pos++; | |
593 | } | |
594 | } | |
595 | } | |
596 | dst += ctx->pitch; | |
597 | } | |
598 | ctx->rotate_code = 0; | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | static inline void codec37_mv(uint8_t *dst, const uint8_t *src, | |
604 | int height, int stride, int x, int y) | |
605 | { | |
606 | int pos, i, j; | |
607 | ||
608 | pos = x + y * stride; | |
609 | for (j = 0; j < 4; j++) { | |
610 | for (i = 0; i < 4; i++) { | |
611 | if ((pos + i) < 0 || (pos + i) >= height * stride) | |
612 | dst[i] = 0; | |
613 | else | |
614 | dst[i] = src[i]; | |
615 | } | |
616 | dst += stride; | |
617 | src += stride; | |
618 | pos += stride; | |
619 | } | |
620 | } | |
621 | ||
622 | static int old_codec37(SANMVideoContext *ctx, int top, | |
623 | int left, int width, int height) | |
624 | { | |
625 | int stride = ctx->pitch; | |
626 | int i, j, k, t; | |
627 | uint8_t *dst, *prev; | |
628 | int skip_run = 0; | |
629 | int compr = bytestream2_get_byte(&ctx->gb); | |
630 | int mvoff = bytestream2_get_byte(&ctx->gb); | |
631 | int seq = bytestream2_get_le16(&ctx->gb); | |
632 | uint32_t decoded_size = bytestream2_get_le32(&ctx->gb); | |
633 | int flags; | |
634 | ||
635 | bytestream2_skip(&ctx->gb, 4); | |
636 | flags = bytestream2_get_byte(&ctx->gb); | |
637 | bytestream2_skip(&ctx->gb, 3); | |
638 | ||
639 | if (decoded_size > ctx->height * stride - left - top * stride) { | |
640 | decoded_size = ctx->height * stride - left - top * stride; | |
641 | av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); | |
642 | } | |
643 | ||
644 | ctx->rotate_code = 0; | |
645 | ||
646 | if (((seq & 1) || !(flags & 1)) && (compr && compr != 2)) | |
647 | rotate_bufs(ctx, 1); | |
648 | ||
649 | dst = ((uint8_t*)ctx->frm0) + left + top * stride; | |
650 | prev = ((uint8_t*)ctx->frm2) + left + top * stride; | |
651 | ||
652 | if (mvoff > 2) { | |
653 | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvoff); | |
654 | return AVERROR_INVALIDDATA; | |
655 | } | |
656 | ||
657 | switch (compr) { | |
658 | case 0: | |
659 | for (i = 0; i < height; i++) { | |
660 | bytestream2_get_buffer(&ctx->gb, dst, width); | |
661 | dst += stride; | |
662 | } | |
663 | memset(ctx->frm1, 0, ctx->height * stride); | |
664 | memset(ctx->frm2, 0, ctx->height * stride); | |
665 | break; | |
666 | case 2: | |
667 | if (rle_decode(ctx, dst, decoded_size)) | |
668 | return AVERROR_INVALIDDATA; | |
669 | memset(ctx->frm1, 0, ctx->frm1_size); | |
670 | memset(ctx->frm2, 0, ctx->frm2_size); | |
671 | break; | |
672 | case 3: | |
673 | case 4: | |
674 | if (flags & 4) { | |
675 | for (j = 0; j < height; j += 4) { | |
676 | for (i = 0; i < width; i += 4) { | |
677 | int code; | |
678 | if (skip_run) { | |
679 | skip_run--; | |
680 | copy_block4(dst + i, prev + i, stride, stride, 4); | |
681 | continue; | |
682 | } | |
683 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
684 | return AVERROR_INVALIDDATA; | |
685 | code = bytestream2_get_byteu(&ctx->gb); | |
686 | switch (code) { | |
687 | case 0xFF: | |
688 | if (bytestream2_get_bytes_left(&ctx->gb) < 16) | |
689 | return AVERROR_INVALIDDATA; | |
690 | for (k = 0; k < 4; k++) | |
691 | bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4); | |
692 | break; | |
693 | case 0xFE: | |
694 | if (bytestream2_get_bytes_left(&ctx->gb) < 4) | |
695 | return AVERROR_INVALIDDATA; | |
696 | for (k = 0; k < 4; k++) | |
697 | memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4); | |
698 | break; | |
699 | case 0xFD: | |
700 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
701 | return AVERROR_INVALIDDATA; | |
702 | t = bytestream2_get_byteu(&ctx->gb); | |
703 | for (k = 0; k < 4; k++) | |
704 | memset(dst + i + k * stride, t, 4); | |
705 | break; | |
706 | default: | |
707 | if (compr == 4 && !code) { | |
708 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
709 | return AVERROR_INVALIDDATA; | |
710 | skip_run = bytestream2_get_byteu(&ctx->gb) + 1; | |
711 | i -= 4; | |
712 | } else { | |
713 | int mx, my; | |
714 | ||
715 | mx = c37_mv[(mvoff * 255 + code) * 2]; | |
716 | my = c37_mv[(mvoff * 255 + code) * 2 + 1]; | |
717 | codec37_mv(dst + i, prev + i + mx + my * stride, | |
718 | ctx->height, stride, i + mx, j + my); | |
719 | } | |
720 | } | |
721 | } | |
722 | dst += stride * 4; | |
723 | prev += stride * 4; | |
724 | } | |
725 | } else { | |
726 | for (j = 0; j < height; j += 4) { | |
727 | for (i = 0; i < width; i += 4) { | |
728 | int code; | |
729 | if (skip_run) { | |
730 | skip_run--; | |
731 | copy_block4(dst + i, prev + i, stride, stride, 4); | |
732 | continue; | |
733 | } | |
734 | code = bytestream2_get_byte(&ctx->gb); | |
735 | if (code == 0xFF) { | |
736 | if (bytestream2_get_bytes_left(&ctx->gb) < 16) | |
737 | return AVERROR_INVALIDDATA; | |
738 | for (k = 0; k < 4; k++) | |
739 | bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4); | |
740 | } else if (compr == 4 && !code) { | |
741 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
742 | return AVERROR_INVALIDDATA; | |
743 | skip_run = bytestream2_get_byteu(&ctx->gb) + 1; | |
744 | i -= 4; | |
745 | } else { | |
746 | int mx, my; | |
747 | ||
748 | mx = c37_mv[(mvoff * 255 + code) * 2]; | |
749 | my = c37_mv[(mvoff * 255 + code) * 2 + 1]; | |
750 | codec37_mv(dst + i, prev + i + mx + my * stride, | |
751 | ctx->height, stride, i + mx, j + my); | |
752 | } | |
753 | } | |
754 | dst += stride * 4; | |
755 | prev += stride * 4; | |
756 | } | |
757 | } | |
758 | break; | |
759 | default: | |
760 | avpriv_report_missing_feature(ctx->avctx, | |
761 | "Subcodec 37 compression %d", compr); | |
762 | return AVERROR_PATCHWELCOME; | |
763 | } | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
768 | static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1, | |
769 | uint8_t *prev2, int stride, int tbl, int size) | |
770 | { | |
771 | int code, k, t; | |
772 | uint8_t colors[2]; | |
773 | int8_t *pglyph; | |
774 | ||
775 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
776 | return AVERROR_INVALIDDATA; | |
777 | ||
778 | code = bytestream2_get_byteu(&ctx->gb); | |
779 | if (code >= 0xF8) { | |
780 | switch (code) { | |
781 | case 0xFF: | |
782 | if (size == 2) { | |
783 | if (bytestream2_get_bytes_left(&ctx->gb) < 4) | |
784 | return AVERROR_INVALIDDATA; | |
785 | dst[0] = bytestream2_get_byteu(&ctx->gb); | |
786 | dst[1] = bytestream2_get_byteu(&ctx->gb); | |
787 | dst[0 + stride] = bytestream2_get_byteu(&ctx->gb); | |
788 | dst[1 + stride] = bytestream2_get_byteu(&ctx->gb); | |
789 | } else { | |
790 | size >>= 1; | |
791 | if (process_block(ctx, dst, prev1, prev2, stride, tbl, size)) | |
792 | return AVERROR_INVALIDDATA; | |
793 | if (process_block(ctx, dst + size, prev1 + size, prev2 + size, | |
794 | stride, tbl, size)) | |
795 | return AVERROR_INVALIDDATA; | |
796 | dst += size * stride; | |
797 | prev1 += size * stride; | |
798 | prev2 += size * stride; | |
799 | if (process_block(ctx, dst, prev1, prev2, stride, tbl, size)) | |
800 | return AVERROR_INVALIDDATA; | |
801 | if (process_block(ctx, dst + size, prev1 + size, prev2 + size, | |
802 | stride, tbl, size)) | |
803 | return AVERROR_INVALIDDATA; | |
804 | } | |
805 | break; | |
806 | case 0xFE: | |
807 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
808 | return AVERROR_INVALIDDATA; | |
809 | ||
810 | t = bytestream2_get_byteu(&ctx->gb); | |
811 | for (k = 0; k < size; k++) | |
812 | memset(dst + k * stride, t, size); | |
813 | break; | |
814 | case 0xFD: | |
815 | if (bytestream2_get_bytes_left(&ctx->gb) < 3) | |
816 | return AVERROR_INVALIDDATA; | |
817 | ||
818 | code = bytestream2_get_byteu(&ctx->gb); | |
819 | pglyph = (size == 8) ? ctx->p8x8glyphs[code] : ctx->p4x4glyphs[code]; | |
820 | bytestream2_get_bufferu(&ctx->gb, colors, 2); | |
821 | ||
822 | for (k = 0; k < size; k++) | |
823 | for (t = 0; t < size; t++) | |
824 | dst[t + k * stride] = colors[!*pglyph++]; | |
825 | break; | |
826 | case 0xFC: | |
827 | for (k = 0; k < size; k++) | |
828 | memcpy(dst + k * stride, prev1 + k * stride, size); | |
829 | break; | |
830 | default: | |
831 | k = bytestream2_tell(&ctx->gb); | |
832 | bytestream2_seek(&ctx->gb, tbl + (code & 7), SEEK_SET); | |
833 | t = bytestream2_get_byte(&ctx->gb); | |
834 | bytestream2_seek(&ctx->gb, k, SEEK_SET); | |
835 | for (k = 0; k < size; k++) | |
836 | memset(dst + k * stride, t, size); | |
837 | } | |
838 | } else { | |
839 | int mx = motion_vectors[code][0]; | |
840 | int my = motion_vectors[code][1]; | |
841 | int index = prev2 - (const uint8_t *)ctx->frm2; | |
842 | ||
843 | av_assert2(index >= 0 && index < (ctx->buf_size >> 1)); | |
844 | ||
845 | if (index < -mx - my * stride || | |
846 | (ctx->buf_size >> 1) - index < mx + size + (my + size - 1) * stride) { | |
847 | av_log(ctx->avctx, AV_LOG_ERROR, "MV is invalid.\n"); | |
848 | return AVERROR_INVALIDDATA; | |
849 | } | |
850 | ||
851 | for (k = 0; k < size; k++) | |
852 | memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size); | |
853 | } | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
858 | static int old_codec47(SANMVideoContext *ctx, int top, | |
859 | int left, int width, int height) | |
860 | { | |
861 | uint32_t decoded_size; | |
862 | int i, j; | |
863 | int stride = ctx->pitch; | |
864 | uint8_t *dst = (uint8_t *)ctx->frm0 + left + top * stride; | |
865 | uint8_t *prev1 = (uint8_t *)ctx->frm1; | |
866 | uint8_t *prev2 = (uint8_t *)ctx->frm2; | |
867 | int tbl_pos = bytestream2_tell(&ctx->gb); | |
868 | int seq = bytestream2_get_le16(&ctx->gb); | |
869 | int compr = bytestream2_get_byte(&ctx->gb); | |
870 | int new_rot = bytestream2_get_byte(&ctx->gb); | |
871 | int skip = bytestream2_get_byte(&ctx->gb); | |
872 | ||
873 | bytestream2_skip(&ctx->gb, 9); | |
874 | decoded_size = bytestream2_get_le32(&ctx->gb); | |
875 | bytestream2_skip(&ctx->gb, 8); | |
876 | ||
877 | if (decoded_size > ctx->height * stride - left - top * stride) { | |
878 | decoded_size = ctx->height * stride - left - top * stride; | |
879 | av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); | |
880 | } | |
881 | ||
882 | if (skip & 1) | |
883 | bytestream2_skip(&ctx->gb, 0x8080); | |
884 | if (!seq) { | |
885 | ctx->prev_seq = -1; | |
886 | memset(prev1, 0, ctx->height * stride); | |
887 | memset(prev2, 0, ctx->height * stride); | |
888 | } | |
889 | ||
890 | switch (compr) { | |
891 | case 0: | |
892 | if (bytestream2_get_bytes_left(&ctx->gb) < width * height) | |
893 | return AVERROR_INVALIDDATA; | |
894 | for (j = 0; j < height; j++) { | |
895 | bytestream2_get_bufferu(&ctx->gb, dst, width); | |
896 | dst += stride; | |
897 | } | |
898 | break; | |
899 | case 1: | |
900 | if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1)) | |
901 | return AVERROR_INVALIDDATA; | |
902 | for (j = 0; j < height; j += 2) { | |
903 | for (i = 0; i < width; i += 2) { | |
904 | dst[i] = | |
905 | dst[i + 1] = | |
906 | dst[stride + i] = | |
907 | dst[stride + i + 1] = bytestream2_get_byteu(&ctx->gb); | |
908 | } | |
909 | dst += stride * 2; | |
910 | } | |
911 | break; | |
912 | case 2: | |
913 | if (seq == ctx->prev_seq + 1) { | |
914 | for (j = 0; j < height; j += 8) { | |
915 | for (i = 0; i < width; i += 8) | |
916 | if (process_block(ctx, dst + i, prev1 + i, prev2 + i, stride, | |
917 | tbl_pos + 8, 8)) | |
918 | return AVERROR_INVALIDDATA; | |
919 | dst += stride * 8; | |
920 | prev1 += stride * 8; | |
921 | prev2 += stride * 8; | |
922 | } | |
923 | } | |
924 | break; | |
925 | case 3: | |
926 | memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height); | |
927 | break; | |
928 | case 4: | |
929 | memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height); | |
930 | break; | |
931 | case 5: | |
932 | if (rle_decode(ctx, dst, decoded_size)) | |
933 | return AVERROR_INVALIDDATA; | |
934 | break; | |
935 | default: | |
936 | avpriv_report_missing_feature(ctx->avctx, | |
937 | "Subcodec 47 compression %d", compr); | |
938 | return AVERROR_PATCHWELCOME; | |
939 | } | |
940 | if (seq == ctx->prev_seq + 1) | |
941 | ctx->rotate_code = new_rot; | |
942 | else | |
943 | ctx->rotate_code = 0; | |
944 | ctx->prev_seq = seq; | |
945 | ||
946 | return 0; | |
947 | } | |
948 | ||
949 | static int process_frame_obj(SANMVideoContext *ctx) | |
950 | { | |
951 | uint16_t codec = bytestream2_get_le16u(&ctx->gb); | |
952 | uint16_t left = bytestream2_get_le16u(&ctx->gb); | |
953 | uint16_t top = bytestream2_get_le16u(&ctx->gb); | |
954 | uint16_t w = bytestream2_get_le16u(&ctx->gb); | |
955 | uint16_t h = bytestream2_get_le16u(&ctx->gb); | |
956 | ||
957 | if (!w || !h) { | |
958 | av_log(ctx->avctx, AV_LOG_ERROR, "Dimensions are invalid.\n"); | |
959 | return AVERROR_INVALIDDATA; | |
960 | } | |
961 | ||
962 | if (ctx->width < left + w || ctx->height < top + h) { | |
963 | int ret = ff_set_dimensions(ctx->avctx, FFMAX(left + w, ctx->width), | |
964 | FFMAX(top + h, ctx->height)); | |
965 | if (ret < 0) | |
966 | return ret; | |
967 | init_sizes(ctx, FFMAX(left + w, ctx->width), | |
968 | FFMAX(top + h, ctx->height)); | |
969 | if (init_buffers(ctx)) { | |
970 | av_log(ctx->avctx, AV_LOG_ERROR, "Error resizing buffers.\n"); | |
971 | return AVERROR(ENOMEM); | |
972 | } | |
973 | } | |
974 | bytestream2_skip(&ctx->gb, 4); | |
975 | ||
976 | switch (codec) { | |
977 | case 1: | |
978 | case 3: | |
979 | return old_codec1(ctx, top, left, w, h); | |
980 | break; | |
981 | case 37: | |
982 | return old_codec37(ctx, top, left, w, h); | |
983 | break; | |
984 | case 47: | |
985 | return old_codec47(ctx, top, left, w, h); | |
986 | break; | |
987 | default: | |
988 | avpriv_request_sample(ctx->avctx, "Subcodec %d", codec); | |
989 | return AVERROR_PATCHWELCOME; | |
990 | } | |
991 | } | |
992 | ||
993 | static int decode_0(SANMVideoContext *ctx) | |
994 | { | |
995 | uint16_t *frm = ctx->frm0; | |
996 | int x, y; | |
997 | ||
998 | if (bytestream2_get_bytes_left(&ctx->gb) < ctx->width * ctx->height * 2) { | |
999 | av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for raw frame.\n"); | |
1000 | return AVERROR_INVALIDDATA; | |
1001 | } | |
1002 | for (y = 0; y < ctx->height; y++) { | |
1003 | for (x = 0; x < ctx->width; x++) | |
1004 | frm[x] = bytestream2_get_le16u(&ctx->gb); | |
1005 | frm += ctx->pitch; | |
1006 | } | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | static int decode_nop(SANMVideoContext *ctx) | |
1011 | { | |
1012 | avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type"); | |
1013 | return AVERROR_PATCHWELCOME; | |
1014 | } | |
1015 | ||
1016 | static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, int pitch) | |
1017 | { | |
1018 | uint8_t *dst = (uint8_t *)pdest; | |
1019 | uint8_t *src = (uint8_t *)psrc; | |
1020 | int stride = pitch * 2; | |
1021 | ||
1022 | switch (block_size) { | |
1023 | case 2: | |
1024 | copy_block4(dst, src, stride, stride, 2); | |
1025 | break; | |
1026 | case 4: | |
1027 | copy_block8(dst, src, stride, stride, 4); | |
1028 | break; | |
1029 | case 8: | |
1030 | copy_block16(dst, src, stride, stride, 8); | |
1031 | break; | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | static void fill_block(uint16_t *pdest, uint16_t color, int block_size, int pitch) | |
1036 | { | |
1037 | int x, y; | |
1038 | ||
1039 | pitch -= block_size; | |
1040 | for (y = 0; y < block_size; y++, pdest += pitch) | |
1041 | for (x = 0; x < block_size; x++) | |
1042 | *pdest++ = color; | |
1043 | } | |
1044 | ||
1045 | static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index, | |
1046 | uint16_t fg_color, uint16_t bg_color, int block_size, | |
1047 | int pitch) | |
1048 | { | |
1049 | int8_t *pglyph; | |
1050 | uint16_t colors[2] = { fg_color, bg_color }; | |
1051 | int x, y; | |
1052 | ||
1053 | if (index >= NGLYPHS) { | |
1054 | av_log(ctx->avctx, AV_LOG_ERROR, "Ignoring nonexistent glyph #%u.\n", index); | |
1055 | return AVERROR_INVALIDDATA; | |
1056 | } | |
1057 | ||
1058 | pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index]; | |
1059 | pitch -= block_size; | |
1060 | ||
1061 | for (y = 0; y < block_size; y++, dst += pitch) | |
1062 | for (x = 0; x < block_size; x++) | |
1063 | *dst++ = colors[*pglyph++]; | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch) | |
1068 | { | |
1069 | uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch; | |
1070 | ||
1071 | if (block_size == 2) { | |
1072 | uint32_t indices; | |
1073 | ||
1074 | if (bytestream2_get_bytes_left(&ctx->gb) < 4) | |
1075 | return AVERROR_INVALIDDATA; | |
1076 | ||
1077 | indices = bytestream2_get_le32u(&ctx->gb); | |
1078 | dst[0] = ctx->codebook[indices & 0xFF]; | |
1079 | indices >>= 8; | |
1080 | dst[1] = ctx->codebook[indices & 0xFF]; | |
1081 | indices >>= 8; | |
1082 | dst[pitch] = ctx->codebook[indices & 0xFF]; | |
1083 | indices >>= 8; | |
1084 | dst[pitch + 1] = ctx->codebook[indices & 0xFF]; | |
1085 | } else { | |
1086 | uint16_t fgcolor, bgcolor; | |
1087 | int glyph; | |
1088 | ||
1089 | if (bytestream2_get_bytes_left(&ctx->gb) < 3) | |
1090 | return AVERROR_INVALIDDATA; | |
1091 | ||
1092 | glyph = bytestream2_get_byteu(&ctx->gb); | |
1093 | bgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; | |
1094 | fgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; | |
1095 | ||
1096 | draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch); | |
1097 | } | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch) | |
1102 | { | |
1103 | uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch; | |
1104 | ||
1105 | if (block_size == 2) { | |
1106 | if (bytestream2_get_bytes_left(&ctx->gb) < 8) | |
1107 | return AVERROR_INVALIDDATA; | |
1108 | ||
1109 | dst[0] = bytestream2_get_le16u(&ctx->gb); | |
1110 | dst[1] = bytestream2_get_le16u(&ctx->gb); | |
1111 | dst[pitch] = bytestream2_get_le16u(&ctx->gb); | |
1112 | dst[pitch + 1] = bytestream2_get_le16u(&ctx->gb); | |
1113 | } else { | |
1114 | uint16_t fgcolor, bgcolor; | |
1115 | int glyph; | |
1116 | ||
1117 | if (bytestream2_get_bytes_left(&ctx->gb) < 5) | |
1118 | return AVERROR_INVALIDDATA; | |
1119 | ||
1120 | glyph = bytestream2_get_byteu(&ctx->gb); | |
1121 | bgcolor = bytestream2_get_le16u(&ctx->gb); | |
1122 | fgcolor = bytestream2_get_le16u(&ctx->gb); | |
1123 | ||
1124 | draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch); | |
1125 | } | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my, | |
1130 | int block_size) | |
1131 | { | |
1132 | int start_pos = cx + mx + (cy + my) * ctx->pitch; | |
1133 | int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1); | |
1134 | ||
1135 | int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1); | |
1136 | ||
1137 | if (!good) | |
1138 | av_log(ctx->avctx, AV_LOG_ERROR, | |
1139 | "Ignoring invalid motion vector (%i, %i)->(%u, %u), block size = %u\n", | |
1140 | cx + mx, cy + my, cx, cy, block_size); | |
1141 | ||
1142 | return good; | |
1143 | } | |
1144 | ||
1145 | static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size) | |
1146 | { | |
1147 | int16_t mx, my, index; | |
1148 | int opcode; | |
1149 | ||
1150 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
1151 | return AVERROR_INVALIDDATA; | |
1152 | ||
1153 | opcode = bytestream2_get_byteu(&ctx->gb); | |
1154 | ||
1155 | switch (opcode) { | |
1156 | default: | |
1157 | mx = motion_vectors[opcode][0]; | |
1158 | my = motion_vectors[opcode][1]; | |
1159 | ||
1160 | if (good_mvec(ctx, cx, cy, mx, my, blk_size)) { | |
1161 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, | |
1162 | ctx->frm2 + cx + mx + ctx->pitch * (cy + my), | |
1163 | blk_size, ctx->pitch); | |
1164 | } | |
1165 | break; | |
1166 | case 0xF5: | |
1167 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) | |
1168 | return AVERROR_INVALIDDATA; | |
1169 | index = bytestream2_get_le16u(&ctx->gb); | |
1170 | ||
1171 | mx = index % ctx->width; | |
1172 | my = index / ctx->width; | |
1173 | ||
1174 | if (good_mvec(ctx, cx, cy, mx, my, blk_size)) { | |
1175 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, | |
1176 | ctx->frm2 + cx + mx + ctx->pitch * (cy + my), | |
1177 | blk_size, ctx->pitch); | |
1178 | } | |
1179 | break; | |
1180 | case 0xF6: | |
1181 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, | |
1182 | ctx->frm1 + cx + ctx->pitch * cy, | |
1183 | blk_size, ctx->pitch); | |
1184 | break; | |
1185 | case 0xF7: | |
1186 | opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch); | |
1187 | break; | |
1188 | ||
1189 | case 0xF8: | |
1190 | opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch); | |
1191 | break; | |
1192 | case 0xF9: | |
1193 | case 0xFA: | |
1194 | case 0xFB: | |
1195 | case 0xFC: | |
1196 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, | |
1197 | ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch); | |
1198 | break; | |
1199 | case 0xFD: | |
1200 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
1201 | return AVERROR_INVALIDDATA; | |
1202 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, | |
1203 | ctx->codebook[bytestream2_get_byteu(&ctx->gb)], blk_size, ctx->pitch); | |
1204 | break; | |
1205 | case 0xFE: | |
1206 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) | |
1207 | return AVERROR_INVALIDDATA; | |
1208 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, | |
1209 | bytestream2_get_le16u(&ctx->gb), blk_size, ctx->pitch); | |
1210 | break; | |
1211 | case 0xFF: | |
1212 | if (blk_size == 2) { | |
1213 | opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch); | |
1214 | } else { | |
1215 | blk_size >>= 1; | |
1216 | if (codec2subblock(ctx, cx, cy, blk_size)) | |
1217 | return AVERROR_INVALIDDATA; | |
1218 | if (codec2subblock(ctx, cx + blk_size, cy, blk_size)) | |
1219 | return AVERROR_INVALIDDATA; | |
1220 | if (codec2subblock(ctx, cx, cy + blk_size, blk_size)) | |
1221 | return AVERROR_INVALIDDATA; | |
1222 | if (codec2subblock(ctx, cx + blk_size, cy + blk_size, blk_size)) | |
1223 | return AVERROR_INVALIDDATA; | |
1224 | } | |
1225 | break; | |
1226 | } | |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | static int decode_2(SANMVideoContext *ctx) | |
1231 | { | |
1232 | int cx, cy, ret; | |
1233 | ||
1234 | for (cy = 0; cy < ctx->aligned_height; cy += 8) | |
1235 | for (cx = 0; cx < ctx->aligned_width; cx += 8) | |
1236 | if (ret = codec2subblock(ctx, cx, cy, 8)) | |
1237 | return ret; | |
1238 | ||
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | static int decode_3(SANMVideoContext *ctx) | |
1243 | { | |
1244 | memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size); | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | static int decode_4(SANMVideoContext *ctx) | |
1249 | { | |
1250 | memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size); | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | static int decode_5(SANMVideoContext *ctx) | |
1255 | { | |
1256 | #if HAVE_BIGENDIAN | |
1257 | uint16_t *frm; | |
1258 | int npixels; | |
1259 | #endif | |
1260 | uint8_t *dst = (uint8_t*)ctx->frm0; | |
1261 | ||
1262 | if (rle_decode(ctx, dst, ctx->buf_size)) | |
1263 | return AVERROR_INVALIDDATA; | |
1264 | ||
1265 | #if HAVE_BIGENDIAN | |
1266 | npixels = ctx->npixels; | |
1267 | frm = ctx->frm0; | |
1268 | while (npixels--) { | |
1269 | *frm = av_bswap16(*frm); | |
1270 | frm++; | |
1271 | } | |
1272 | #endif | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | static int decode_6(SANMVideoContext *ctx) | |
1278 | { | |
1279 | int npixels = ctx->npixels; | |
1280 | uint16_t *frm = ctx->frm0; | |
1281 | ||
1282 | if (bytestream2_get_bytes_left(&ctx->gb) < npixels) { | |
1283 | av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for frame.\n"); | |
1284 | return AVERROR_INVALIDDATA; | |
1285 | } | |
1286 | while (npixels--) | |
1287 | *frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; | |
1288 | ||
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | static int decode_8(SANMVideoContext *ctx) | |
1293 | { | |
1294 | uint16_t *pdest = ctx->frm0; | |
1295 | uint8_t *rsrc; | |
1296 | long npixels = ctx->npixels; | |
1297 | ||
1298 | av_fast_malloc(&ctx->rle_buf, &ctx->rle_buf_size, npixels); | |
1299 | if (!ctx->rle_buf) { | |
1300 | av_log(ctx->avctx, AV_LOG_ERROR, "RLE buffer allocation failed.\n"); | |
1301 | return AVERROR(ENOMEM); | |
1302 | } | |
1303 | rsrc = ctx->rle_buf; | |
1304 | ||
1305 | if (rle_decode(ctx, rsrc, npixels)) | |
1306 | return AVERROR_INVALIDDATA; | |
1307 | ||
1308 | while (npixels--) | |
1309 | *pdest++ = ctx->codebook[*rsrc++]; | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | typedef int (*frm_decoder)(SANMVideoContext *ctx); | |
1315 | ||
1316 | static const frm_decoder v1_decoders[] = { | |
1317 | decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5, | |
1318 | decode_6, decode_nop, decode_8 | |
1319 | }; | |
1320 | ||
1321 | static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr) | |
1322 | { | |
1323 | int i, ret; | |
1324 | ||
1325 | if ((ret = bytestream2_get_bytes_left(&ctx->gb)) < 560) { | |
1326 | av_log(ctx->avctx, AV_LOG_ERROR, "Input frame too short (%d bytes).\n", | |
1327 | ret); | |
1328 | return AVERROR_INVALIDDATA; | |
1329 | } | |
1330 | bytestream2_skip(&ctx->gb, 8); // skip pad | |
1331 | ||
1332 | hdr->width = bytestream2_get_le32u(&ctx->gb); | |
1333 | hdr->height = bytestream2_get_le32u(&ctx->gb); | |
1334 | ||
1335 | if (hdr->width != ctx->width || hdr->height != ctx->height) { | |
1336 | avpriv_report_missing_feature(ctx->avctx, "Variable size frames"); | |
1337 | return AVERROR_PATCHWELCOME; | |
1338 | } | |
1339 | ||
1340 | hdr->seq_num = bytestream2_get_le16u(&ctx->gb); | |
1341 | hdr->codec = bytestream2_get_byteu(&ctx->gb); | |
1342 | hdr->rotate_code = bytestream2_get_byteu(&ctx->gb); | |
1343 | ||
1344 | bytestream2_skip(&ctx->gb, 4); // skip pad | |
1345 | ||
1346 | for (i = 0; i < 4; i++) | |
1347 | ctx->small_codebook[i] = bytestream2_get_le16u(&ctx->gb); | |
1348 | hdr->bg_color = bytestream2_get_le16u(&ctx->gb); | |
1349 | ||
1350 | bytestream2_skip(&ctx->gb, 2); // skip pad | |
1351 | ||
1352 | hdr->rle_output_size = bytestream2_get_le32u(&ctx->gb); | |
1353 | for (i = 0; i < 256; i++) | |
1354 | ctx->codebook[i] = bytestream2_get_le16u(&ctx->gb); | |
1355 | ||
1356 | bytestream2_skip(&ctx->gb, 8); // skip pad | |
1357 | ||
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color) | |
1362 | { | |
1363 | while (buf_size--) | |
1364 | *pbuf++ = color; | |
1365 | } | |
1366 | ||
1367 | static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr) | |
1368 | { | |
1369 | uint8_t *dst; | |
1370 | const uint8_t *src = (uint8_t*) ctx->frm0; | |
1371 | int ret, dstpitch, height = ctx->height; | |
1372 | int srcpitch = ctx->pitch * (hdr ? sizeof(ctx->frm0[0]) : 1); | |
1373 | ||
1374 | if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0) | |
1375 | return ret; | |
1376 | ||
1377 | dst = ctx->frame->data[0]; | |
1378 | dstpitch = ctx->frame->linesize[0]; | |
1379 | ||
1380 | while (height--) { | |
1381 | memcpy(dst, src, srcpitch); | |
1382 | src += srcpitch; | |
1383 | dst += dstpitch; | |
1384 | } | |
1385 | ||
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | static int decode_frame(AVCodecContext *avctx, void *data, | |
1390 | int *got_frame_ptr, AVPacket *pkt) | |
1391 | { | |
1392 | SANMVideoContext *ctx = avctx->priv_data; | |
1393 | int i, ret; | |
1394 | ||
1395 | ctx->frame = data; | |
1396 | bytestream2_init(&ctx->gb, pkt->data, pkt->size); | |
1397 | ||
1398 | if (!ctx->version) { | |
1399 | int to_store = 0; | |
1400 | ||
1401 | while (bytestream2_get_bytes_left(&ctx->gb) >= 8) { | |
1402 | uint32_t sig, size; | |
1403 | int pos; | |
1404 | ||
1405 | sig = bytestream2_get_be32u(&ctx->gb); | |
1406 | size = bytestream2_get_be32u(&ctx->gb); | |
1407 | pos = bytestream2_tell(&ctx->gb); | |
1408 | ||
1409 | if (bytestream2_get_bytes_left(&ctx->gb) < size) { | |
1410 | av_log(avctx, AV_LOG_ERROR, "Incorrect chunk size %"PRIu32".\n", size); | |
1411 | break; | |
1412 | } | |
1413 | switch (sig) { | |
1414 | case MKBETAG('N', 'P', 'A', 'L'): | |
1415 | if (size != PALETTE_SIZE * 3) { | |
1416 | av_log(avctx, AV_LOG_ERROR, | |
1417 | "Incorrect palette block size %"PRIu32".\n", size); | |
1418 | return AVERROR_INVALIDDATA; | |
1419 | } | |
1420 | for (i = 0; i < PALETTE_SIZE; i++) | |
1421 | ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); | |
1422 | break; | |
1423 | case MKBETAG('F', 'O', 'B', 'J'): | |
1424 | if (size < 16) | |
1425 | return AVERROR_INVALIDDATA; | |
1426 | if (ret = process_frame_obj(ctx)) | |
1427 | return ret; | |
1428 | break; | |
1429 | case MKBETAG('X', 'P', 'A', 'L'): | |
1430 | if (size == 6 || size == 4) { | |
1431 | uint8_t tmp[3]; | |
1432 | int j; | |
1433 | ||
1434 | for (i = 0; i < PALETTE_SIZE; i++) { | |
1435 | for (j = 0; j < 3; j++) { | |
1436 | int t = (ctx->pal[i] >> (16 - j * 8)) & 0xFF; | |
1437 | tmp[j] = av_clip_uint8((t * 129 + ctx->delta_pal[i * 3 + j]) >> 7); | |
1438 | } | |
1439 | ctx->pal[i] = 0xFFU << 24 | AV_RB24(tmp); | |
1440 | } | |
1441 | } else { | |
1442 | if (size < PALETTE_DELTA * 2 + 4) { | |
1443 | av_log(avctx, AV_LOG_ERROR, | |
1444 | "Incorrect palette change block size %"PRIu32".\n", | |
1445 | size); | |
1446 | return AVERROR_INVALIDDATA; | |
1447 | } | |
1448 | bytestream2_skipu(&ctx->gb, 4); | |
1449 | for (i = 0; i < PALETTE_DELTA; i++) | |
1450 | ctx->delta_pal[i] = bytestream2_get_le16u(&ctx->gb); | |
1451 | if (size >= PALETTE_DELTA * 5 + 4) { | |
1452 | for (i = 0; i < PALETTE_SIZE; i++) | |
1453 | ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); | |
1454 | } else { | |
1455 | memset(ctx->pal, 0, sizeof(ctx->pal)); | |
1456 | } | |
1457 | } | |
1458 | break; | |
1459 | case MKBETAG('S', 'T', 'O', 'R'): | |
1460 | to_store = 1; | |
1461 | break; | |
1462 | case MKBETAG('F', 'T', 'C', 'H'): | |
1463 | memcpy(ctx->frm0, ctx->stored_frame, ctx->buf_size); | |
1464 | break; | |
1465 | default: | |
1466 | bytestream2_skip(&ctx->gb, size); | |
1467 | av_log(avctx, AV_LOG_DEBUG, | |
1468 | "Unknown/unsupported chunk %"PRIx32".\n", sig); | |
1469 | break; | |
1470 | } | |
1471 | ||
1472 | bytestream2_seek(&ctx->gb, pos + size, SEEK_SET); | |
1473 | if (size & 1) | |
1474 | bytestream2_skip(&ctx->gb, 1); | |
1475 | } | |
1476 | if (to_store) | |
1477 | memcpy(ctx->stored_frame, ctx->frm0, ctx->buf_size); | |
1478 | if ((ret = copy_output(ctx, NULL))) | |
1479 | return ret; | |
1480 | memcpy(ctx->frame->data[1], ctx->pal, 1024); | |
1481 | } else { | |
1482 | SANMFrameHeader header; | |
1483 | ||
1484 | if ((ret = read_frame_header(ctx, &header))) | |
1485 | return ret; | |
1486 | ||
1487 | ctx->rotate_code = header.rotate_code; | |
1488 | if ((ctx->frame->key_frame = !header.seq_num)) { | |
1489 | ctx->frame->pict_type = AV_PICTURE_TYPE_I; | |
1490 | fill_frame(ctx->frm1, ctx->npixels, header.bg_color); | |
1491 | fill_frame(ctx->frm2, ctx->npixels, header.bg_color); | |
1492 | } else { | |
1493 | ctx->frame->pict_type = AV_PICTURE_TYPE_P; | |
1494 | } | |
1495 | ||
1496 | if (header.codec < FF_ARRAY_ELEMS(v1_decoders)) { | |
1497 | if ((ret = v1_decoders[header.codec](ctx))) { | |
1498 | av_log(avctx, AV_LOG_ERROR, | |
1499 | "Subcodec %d: error decoding frame.\n", header.codec); | |
1500 | return ret; | |
1501 | } | |
1502 | } else { | |
1503 | avpriv_request_sample(avctx, "Subcodec %d", header.codec); | |
1504 | return AVERROR_PATCHWELCOME; | |
1505 | } | |
1506 | ||
1507 | if ((ret = copy_output(ctx, &header))) | |
1508 | return ret; | |
1509 | } | |
1510 | if (ctx->rotate_code) | |
1511 | rotate_bufs(ctx, ctx->rotate_code); | |
1512 | ||
1513 | *got_frame_ptr = 1; | |
1514 | ||
1515 | return pkt->size; | |
1516 | } | |
1517 | ||
1518 | AVCodec ff_sanm_decoder = { | |
1519 | .name = "sanm", | |
1520 | .long_name = NULL_IF_CONFIG_SMALL("LucasArts SANM/Smush video"), | |
1521 | .type = AVMEDIA_TYPE_VIDEO, | |
1522 | .id = AV_CODEC_ID_SANM, | |
1523 | .priv_data_size = sizeof(SANMVideoContext), | |
1524 | .init = decode_init, | |
1525 | .close = decode_end, | |
1526 | .decode = decode_frame, | |
1527 | .capabilities = CODEC_CAP_DR1, | |
1528 | }; |