Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/sanm.c |
Date: | 2022-07-05 19:52:29 |
Exec | Total | Coverage | |
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Lines: | 324 | 766 | 42.3% |
Branches: | 164 | 466 | 35.2% |
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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 "codec_internal.h" | ||
31 | #include "internal.h" | ||
32 | |||
33 | #define NGLYPHS 256 | ||
34 | #define GLYPH_COORD_VECT_SIZE 16 | ||
35 | #define PALETTE_SIZE 256 | ||
36 | #define PALETTE_DELTA 768 | ||
37 | |||
38 | static const int8_t glyph4_x[GLYPH_COORD_VECT_SIZE] = { | ||
39 | 0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1 | ||
40 | }; | ||
41 | |||
42 | static const int8_t glyph4_y[GLYPH_COORD_VECT_SIZE] = { | ||
43 | 0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2 | ||
44 | }; | ||
45 | |||
46 | static const int8_t glyph8_x[GLYPH_COORD_VECT_SIZE] = { | ||
47 | 0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0 | ||
48 | }; | ||
49 | |||
50 | static const int8_t glyph8_y[GLYPH_COORD_VECT_SIZE] = { | ||
51 | 0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1 | ||
52 | }; | ||
53 | |||
54 | static const int8_t motion_vectors[256][2] = { | ||
55 | { 0, 0 }, { -1, -43 }, { 6, -43 }, { -9, -42 }, { 13, -41 }, | ||
56 | { -16, -40 }, { 19, -39 }, { -23, -36 }, { 26, -34 }, { -2, -33 }, | ||
57 | { 4, -33 }, { -29, -32 }, { -9, -32 }, { 11, -31 }, { -16, -29 }, | ||
58 | { 32, -29 }, { 18, -28 }, { -34, -26 }, { -22, -25 }, { -1, -25 }, | ||
59 | { 3, -25 }, { -7, -24 }, { 8, -24 }, { 24, -23 }, { 36, -23 }, | ||
60 | { -12, -22 }, { 13, -21 }, { -38, -20 }, { 0, -20 }, { -27, -19 }, | ||
61 | { -4, -19 }, { 4, -19 }, { -17, -18 }, { -8, -17 }, { 8, -17 }, | ||
62 | { 18, -17 }, { 28, -17 }, { 39, -17 }, { -12, -15 }, { 12, -15 }, | ||
63 | { -21, -14 }, { -1, -14 }, { 1, -14 }, { -41, -13 }, { -5, -13 }, | ||
64 | { 5, -13 }, { 21, -13 }, { -31, -12 }, { -15, -11 }, { -8, -11 }, | ||
65 | { 8, -11 }, { 15, -11 }, { -2, -10 }, { 1, -10 }, { 31, -10 }, | ||
66 | { -23, -9 }, { -11, -9 }, { -5, -9 }, { 4, -9 }, { 11, -9 }, | ||
67 | { 42, -9 }, { 6, -8 }, { 24, -8 }, { -18, -7 }, { -7, -7 }, | ||
68 | { -3, -7 }, { -1, -7 }, { 2, -7 }, { 18, -7 }, { -43, -6 }, | ||
69 | { -13, -6 }, { -4, -6 }, { 4, -6 }, { 8, -6 }, { -33, -5 }, | ||
70 | { -9, -5 }, { -2, -5 }, { 0, -5 }, { 2, -5 }, { 5, -5 }, | ||
71 | { 13, -5 }, { -25, -4 }, { -6, -4 }, { -3, -4 }, { 3, -4 }, | ||
72 | { 9, -4 }, { -19, -3 }, { -7, -3 }, { -4, -3 }, { -2, -3 }, | ||
73 | { -1, -3 }, { 0, -3 }, { 1, -3 }, { 2, -3 }, { 4, -3 }, | ||
74 | { 6, -3 }, { 33, -3 }, { -14, -2 }, { -10, -2 }, { -5, -2 }, | ||
75 | { -3, -2 }, { -2, -2 }, { -1, -2 }, { 0, -2 }, { 1, -2 }, | ||
76 | { 2, -2 }, { 3, -2 }, { 5, -2 }, { 7, -2 }, { 14, -2 }, | ||
77 | { 19, -2 }, { 25, -2 }, { 43, -2 }, { -7, -1 }, { -3, -1 }, | ||
78 | { -2, -1 }, { -1, -1 }, { 0, -1 }, { 1, -1 }, { 2, -1 }, | ||
79 | { 3, -1 }, { 10, -1 }, { -5, 0 }, { -3, 0 }, { -2, 0 }, | ||
80 | { -1, 0 }, { 1, 0 }, { 2, 0 }, { 3, 0 }, { 5, 0 }, | ||
81 | { 7, 0 }, { -10, 1 }, { -7, 1 }, { -3, 1 }, { -2, 1 }, | ||
82 | { -1, 1 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1 }, | ||
83 | { -43, 2 }, { -25, 2 }, { -19, 2 }, { -14, 2 }, { -5, 2 }, | ||
84 | { -3, 2 }, { -2, 2 }, { -1, 2 }, { 0, 2 }, { 1, 2 }, | ||
85 | { 2, 2 }, { 3, 2 }, { 5, 2 }, { 7, 2 }, { 10, 2 }, | ||
86 | { 14, 2 }, { -33, 3 }, { -6, 3 }, { -4, 3 }, { -2, 3 }, | ||
87 | { -1, 3 }, { 0, 3 }, { 1, 3 }, { 2, 3 }, { 4, 3 }, | ||
88 | { 19, 3 }, { -9, 4 }, { -3, 4 }, { 3, 4 }, { 7, 4 }, | ||
89 | { 25, 4 }, { -13, 5 }, { -5, 5 }, { -2, 5 }, { 0, 5 }, | ||
90 | { 2, 5 }, { 5, 5 }, { 9, 5 }, { 33, 5 }, { -8, 6 }, | ||
91 | { -4, 6 }, { 4, 6 }, { 13, 6 }, { 43, 6 }, { -18, 7 }, | ||
92 | { -2, 7 }, { 0, 7 }, { 2, 7 }, { 7, 7 }, { 18, 7 }, | ||
93 | { -24, 8 }, { -6, 8 }, { -42, 9 }, { -11, 9 }, { -4, 9 }, | ||
94 | { 5, 9 }, { 11, 9 }, { 23, 9 }, { -31, 10 }, { -1, 10 }, | ||
95 | { 2, 10 }, { -15, 11 }, { -8, 11 }, { 8, 11 }, { 15, 11 }, | ||
96 | { 31, 12 }, { -21, 13 }, { -5, 13 }, { 5, 13 }, { 41, 13 }, | ||
97 | { -1, 14 }, { 1, 14 }, { 21, 14 }, { -12, 15 }, { 12, 15 }, | ||
98 | { -39, 17 }, { -28, 17 }, { -18, 17 }, { -8, 17 }, { 8, 17 }, | ||
99 | { 17, 18 }, { -4, 19 }, { 0, 19 }, { 4, 19 }, { 27, 19 }, | ||
100 | { 38, 20 }, { -13, 21 }, { 12, 22 }, { -36, 23 }, { -24, 23 }, | ||
101 | { -8, 24 }, { 7, 24 }, { -3, 25 }, { 1, 25 }, { 22, 25 }, | ||
102 | { 34, 26 }, { -18, 28 }, { -32, 29 }, { 16, 29 }, { -11, 31 }, | ||
103 | { 9, 32 }, { 29, 32 }, { -4, 33 }, { 2, 33 }, { -26, 34 }, | ||
104 | { 23, 36 }, { -19, 39 }, { 16, 40 }, { -13, 41 }, { 9, 42 }, | ||
105 | { -6, 43 }, { 1, 43 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, | ||
106 | }; | ||
107 | |||
108 | static const int8_t c37_mv[] = { | ||
109 | 0, 0, 1, 0, 2, 0, 3, 0, 5, 0, | ||
110 | 8, 0, 13, 0, 21, 0, -1, 0, -2, 0, | ||
111 | -3, 0, -5, 0, -8, 0, -13, 0, -17, 0, | ||
112 | -21, 0, 0, 1, 1, 1, 2, 1, 3, 1, | ||
113 | 5, 1, 8, 1, 13, 1, 21, 1, -1, 1, | ||
114 | -2, 1, -3, 1, -5, 1, -8, 1, -13, 1, | ||
115 | -17, 1, -21, 1, 0, 2, 1, 2, 2, 2, | ||
116 | 3, 2, 5, 2, 8, 2, 13, 2, 21, 2, | ||
117 | -1, 2, -2, 2, -3, 2, -5, 2, -8, 2, | ||
118 | -13, 2, -17, 2, -21, 2, 0, 3, 1, 3, | ||
119 | 2, 3, 3, 3, 5, 3, 8, 3, 13, 3, | ||
120 | 21, 3, -1, 3, -2, 3, -3, 3, -5, 3, | ||
121 | -8, 3, -13, 3, -17, 3, -21, 3, 0, 5, | ||
122 | 1, 5, 2, 5, 3, 5, 5, 5, 8, 5, | ||
123 | 13, 5, 21, 5, -1, 5, -2, 5, -3, 5, | ||
124 | -5, 5, -8, 5, -13, 5, -17, 5, -21, 5, | ||
125 | 0, 8, 1, 8, 2, 8, 3, 8, 5, 8, | ||
126 | 8, 8, 13, 8, 21, 8, -1, 8, -2, 8, | ||
127 | -3, 8, -5, 8, -8, 8, -13, 8, -17, 8, | ||
128 | -21, 8, 0, 13, 1, 13, 2, 13, 3, 13, | ||
129 | 5, 13, 8, 13, 13, 13, 21, 13, -1, 13, | ||
130 | -2, 13, -3, 13, -5, 13, -8, 13, -13, 13, | ||
131 | -17, 13, -21, 13, 0, 21, 1, 21, 2, 21, | ||
132 | 3, 21, 5, 21, 8, 21, 13, 21, 21, 21, | ||
133 | -1, 21, -2, 21, -3, 21, -5, 21, -8, 21, | ||
134 | -13, 21, -17, 21, -21, 21, 0, -1, 1, -1, | ||
135 | 2, -1, 3, -1, 5, -1, 8, -1, 13, -1, | ||
136 | 21, -1, -1, -1, -2, -1, -3, -1, -5, -1, | ||
137 | -8, -1, -13, -1, -17, -1, -21, -1, 0, -2, | ||
138 | 1, -2, 2, -2, 3, -2, 5, -2, 8, -2, | ||
139 | 13, -2, 21, -2, -1, -2, -2, -2, -3, -2, | ||
140 | -5, -2, -8, -2, -13, -2, -17, -2, -21, -2, | ||
141 | 0, -3, 1, -3, 2, -3, 3, -3, 5, -3, | ||
142 | 8, -3, 13, -3, 21, -3, -1, -3, -2, -3, | ||
143 | -3, -3, -5, -3, -8, -3, -13, -3, -17, -3, | ||
144 | -21, -3, 0, -5, 1, -5, 2, -5, 3, -5, | ||
145 | 5, -5, 8, -5, 13, -5, 21, -5, -1, -5, | ||
146 | -2, -5, -3, -5, -5, -5, -8, -5, -13, -5, | ||
147 | -17, -5, -21, -5, 0, -8, 1, -8, 2, -8, | ||
148 | 3, -8, 5, -8, 8, -8, 13, -8, 21, -8, | ||
149 | -1, -8, -2, -8, -3, -8, -5, -8, -8, -8, | ||
150 | -13, -8, -17, -8, -21, -8, 0, -13, 1, -13, | ||
151 | 2, -13, 3, -13, 5, -13, 8, -13, 13, -13, | ||
152 | 21, -13, -1, -13, -2, -13, -3, -13, -5, -13, | ||
153 | -8, -13, -13, -13, -17, -13, -21, -13, 0, -17, | ||
154 | 1, -17, 2, -17, 3, -17, 5, -17, 8, -17, | ||
155 | 13, -17, 21, -17, -1, -17, -2, -17, -3, -17, | ||
156 | -5, -17, -8, -17, -13, -17, -17, -17, -21, -17, | ||
157 | 0, -21, 1, -21, 2, -21, 3, -21, 5, -21, | ||
158 | 8, -21, 13, -21, 21, -21, -1, -21, -2, -21, | ||
159 | -3, -21, -5, -21, -8, -21, -13, -21, -17, -21, | ||
160 | 0, 0, -8, -29, 8, -29, -18, -25, 17, -25, | ||
161 | 0, -23, -6, -22, 6, -22, -13, -19, 12, -19, | ||
162 | 0, -18, 25, -18, -25, -17, -5, -17, 5, -17, | ||
163 | -10, -15, 10, -15, 0, -14, -4, -13, 4, -13, | ||
164 | 19, -13, -19, -12, -8, -11, -2, -11, 0, -11, | ||
165 | 2, -11, 8, -11, -15, -10, -4, -10, 4, -10, | ||
166 | 15, -10, -6, -9, -1, -9, 1, -9, 6, -9, | ||
167 | -29, -8, -11, -8, -8, -8, -3, -8, 3, -8, | ||
168 | 8, -8, 11, -8, 29, -8, -5, -7, -2, -7, | ||
169 | 0, -7, 2, -7, 5, -7, -22, -6, -9, -6, | ||
170 | -6, -6, -3, -6, -1, -6, 1, -6, 3, -6, | ||
171 | 6, -6, 9, -6, 22, -6, -17, -5, -7, -5, | ||
172 | -4, -5, -2, -5, 0, -5, 2, -5, 4, -5, | ||
173 | 7, -5, 17, -5, -13, -4, -10, -4, -5, -4, | ||
174 | -3, -4, -1, -4, 0, -4, 1, -4, 3, -4, | ||
175 | 5, -4, 10, -4, 13, -4, -8, -3, -6, -3, | ||
176 | -4, -3, -3, -3, -2, -3, -1, -3, 0, -3, | ||
177 | 1, -3, 2, -3, 4, -3, 6, -3, 8, -3, | ||
178 | -11, -2, -7, -2, -5, -2, -3, -2, -2, -2, | ||
179 | -1, -2, 0, -2, 1, -2, 2, -2, 3, -2, | ||
180 | 5, -2, 7, -2, 11, -2, -9, -1, -6, -1, | ||
181 | -4, -1, -3, -1, -2, -1, -1, -1, 0, -1, | ||
182 | 1, -1, 2, -1, 3, -1, 4, -1, 6, -1, | ||
183 | 9, -1, -31, 0, -23, 0, -18, 0, -14, 0, | ||
184 | -11, 0, -7, 0, -5, 0, -4, 0, -3, 0, | ||
185 | -2, 0, -1, 0, 0, -31, 1, 0, 2, 0, | ||
186 | 3, 0, 4, 0, 5, 0, 7, 0, 11, 0, | ||
187 | 14, 0, 18, 0, 23, 0, 31, 0, -9, 1, | ||
188 | -6, 1, -4, 1, -3, 1, -2, 1, -1, 1, | ||
189 | 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, | ||
190 | 6, 1, 9, 1, -11, 2, -7, 2, -5, 2, | ||
191 | -3, 2, -2, 2, -1, 2, 0, 2, 1, 2, | ||
192 | 2, 2, 3, 2, 5, 2, 7, 2, 11, 2, | ||
193 | -8, 3, -6, 3, -4, 3, -2, 3, -1, 3, | ||
194 | 0, 3, 1, 3, 2, 3, 3, 3, 4, 3, | ||
195 | 6, 3, 8, 3, -13, 4, -10, 4, -5, 4, | ||
196 | -3, 4, -1, 4, 0, 4, 1, 4, 3, 4, | ||
197 | 5, 4, 10, 4, 13, 4, -17, 5, -7, 5, | ||
198 | -4, 5, -2, 5, 0, 5, 2, 5, 4, 5, | ||
199 | 7, 5, 17, 5, -22, 6, -9, 6, -6, 6, | ||
200 | -3, 6, -1, 6, 1, 6, 3, 6, 6, 6, | ||
201 | 9, 6, 22, 6, -5, 7, -2, 7, 0, 7, | ||
202 | 2, 7, 5, 7, -29, 8, -11, 8, -8, 8, | ||
203 | -3, 8, 3, 8, 8, 8, 11, 8, 29, 8, | ||
204 | -6, 9, -1, 9, 1, 9, 6, 9, -15, 10, | ||
205 | -4, 10, 4, 10, 15, 10, -8, 11, -2, 11, | ||
206 | 0, 11, 2, 11, 8, 11, 19, 12, -19, 13, | ||
207 | -4, 13, 4, 13, 0, 14, -10, 15, 10, 15, | ||
208 | -5, 17, 5, 17, 25, 17, -25, 18, 0, 18, | ||
209 | -12, 19, 13, 19, -6, 22, 6, 22, 0, 23, | ||
210 | -17, 25, 18, 25, -8, 29, 8, 29, 0, 31, | ||
211 | 0, 0, -6, -22, 6, -22, -13, -19, 12, -19, | ||
212 | 0, -18, -5, -17, 5, -17, -10, -15, 10, -15, | ||
213 | 0, -14, -4, -13, 4, -13, 19, -13, -19, -12, | ||
214 | -8, -11, -2, -11, 0, -11, 2, -11, 8, -11, | ||
215 | -15, -10, -4, -10, 4, -10, 15, -10, -6, -9, | ||
216 | -1, -9, 1, -9, 6, -9, -11, -8, -8, -8, | ||
217 | -3, -8, 0, -8, 3, -8, 8, -8, 11, -8, | ||
218 | -5, -7, -2, -7, 0, -7, 2, -7, 5, -7, | ||
219 | -22, -6, -9, -6, -6, -6, -3, -6, -1, -6, | ||
220 | 1, -6, 3, -6, 6, -6, 9, -6, 22, -6, | ||
221 | -17, -5, -7, -5, -4, -5, -2, -5, -1, -5, | ||
222 | 0, -5, 1, -5, 2, -5, 4, -5, 7, -5, | ||
223 | 17, -5, -13, -4, -10, -4, -5, -4, -3, -4, | ||
224 | -2, -4, -1, -4, 0, -4, 1, -4, 2, -4, | ||
225 | 3, -4, 5, -4, 10, -4, 13, -4, -8, -3, | ||
226 | -6, -3, -4, -3, -3, -3, -2, -3, -1, -3, | ||
227 | 0, -3, 1, -3, 2, -3, 3, -3, 4, -3, | ||
228 | 6, -3, 8, -3, -11, -2, -7, -2, -5, -2, | ||
229 | -4, -2, -3, -2, -2, -2, -1, -2, 0, -2, | ||
230 | 1, -2, 2, -2, 3, -2, 4, -2, 5, -2, | ||
231 | 7, -2, 11, -2, -9, -1, -6, -1, -5, -1, | ||
232 | -4, -1, -3, -1, -2, -1, -1, -1, 0, -1, | ||
233 | 1, -1, 2, -1, 3, -1, 4, -1, 5, -1, | ||
234 | 6, -1, 9, -1, -23, 0, -18, 0, -14, 0, | ||
235 | -11, 0, -7, 0, -5, 0, -4, 0, -3, 0, | ||
236 | -2, 0, -1, 0, 0, -23, 1, 0, 2, 0, | ||
237 | 3, 0, 4, 0, 5, 0, 7, 0, 11, 0, | ||
238 | 14, 0, 18, 0, 23, 0, -9, 1, -6, 1, | ||
239 | -5, 1, -4, 1, -3, 1, -2, 1, -1, 1, | ||
240 | 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, | ||
241 | 5, 1, 6, 1, 9, 1, -11, 2, -7, 2, | ||
242 | -5, 2, -4, 2, -3, 2, -2, 2, -1, 2, | ||
243 | 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, | ||
244 | 5, 2, 7, 2, 11, 2, -8, 3, -6, 3, | ||
245 | -4, 3, -3, 3, -2, 3, -1, 3, 0, 3, | ||
246 | 1, 3, 2, 3, 3, 3, 4, 3, 6, 3, | ||
247 | 8, 3, -13, 4, -10, 4, -5, 4, -3, 4, | ||
248 | -2, 4, -1, 4, 0, 4, 1, 4, 2, 4, | ||
249 | 3, 4, 5, 4, 10, 4, 13, 4, -17, 5, | ||
250 | -7, 5, -4, 5, -2, 5, -1, 5, 0, 5, | ||
251 | 1, 5, 2, 5, 4, 5, 7, 5, 17, 5, | ||
252 | -22, 6, -9, 6, -6, 6, -3, 6, -1, 6, | ||
253 | 1, 6, 3, 6, 6, 6, 9, 6, 22, 6, | ||
254 | -5, 7, -2, 7, 0, 7, 2, 7, 5, 7, | ||
255 | -11, 8, -8, 8, -3, 8, 0, 8, 3, 8, | ||
256 | 8, 8, 11, 8, -6, 9, -1, 9, 1, 9, | ||
257 | 6, 9, -15, 10, -4, 10, 4, 10, 15, 10, | ||
258 | -8, 11, -2, 11, 0, 11, 2, 11, 8, 11, | ||
259 | 19, 12, -19, 13, -4, 13, 4, 13, 0, 14, | ||
260 | -10, 15, 10, 15, -5, 17, 5, 17, 0, 18, | ||
261 | -12, 19, 13, 19, -6, 22, 6, 22, 0, 23, | ||
262 | }; | ||
263 | |||
264 | typedef struct SANMVideoContext { | ||
265 | AVCodecContext *avctx; | ||
266 | GetByteContext gb; | ||
267 | |||
268 | int version, subversion; | ||
269 | uint32_t pal[PALETTE_SIZE]; | ||
270 | int16_t delta_pal[PALETTE_DELTA]; | ||
271 | |||
272 | ptrdiff_t pitch; | ||
273 | int width, height; | ||
274 | int aligned_width, aligned_height; | ||
275 | int prev_seq; | ||
276 | |||
277 | AVFrame *frame; | ||
278 | uint16_t *frm0, *frm1, *frm2; | ||
279 | uint8_t *stored_frame; | ||
280 | uint32_t frm0_size, frm1_size, frm2_size; | ||
281 | uint32_t stored_frame_size; | ||
282 | |||
283 | uint8_t *rle_buf; | ||
284 | unsigned int rle_buf_size; | ||
285 | |||
286 | int rotate_code; | ||
287 | |||
288 | long npixels, buf_size; | ||
289 | |||
290 | uint16_t codebook[256]; | ||
291 | uint16_t small_codebook[4]; | ||
292 | |||
293 | int8_t p4x4glyphs[NGLYPHS][16]; | ||
294 | int8_t p8x8glyphs[NGLYPHS][64]; | ||
295 | } SANMVideoContext; | ||
296 | |||
297 | typedef struct SANMFrameHeader { | ||
298 | int seq_num, codec, rotate_code, rle_output_size; | ||
299 | |||
300 | uint16_t bg_color; | ||
301 | uint32_t width, height; | ||
302 | } SANMFrameHeader; | ||
303 | |||
304 | enum GlyphEdge { | ||
305 | LEFT_EDGE, | ||
306 | TOP_EDGE, | ||
307 | RIGHT_EDGE, | ||
308 | BOTTOM_EDGE, | ||
309 | NO_EDGE | ||
310 | }; | ||
311 | |||
312 | enum GlyphDir { | ||
313 | DIR_LEFT, | ||
314 | DIR_UP, | ||
315 | DIR_RIGHT, | ||
316 | DIR_DOWN, | ||
317 | NO_DIR | ||
318 | }; | ||
319 | |||
320 | /** | ||
321 | * Return enum GlyphEdge of box where point (x, y) lies. | ||
322 | * | ||
323 | * @param x x point coordinate | ||
324 | * @param y y point coordinate | ||
325 | * @param edge_size box width/height. | ||
326 | */ | ||
327 | 1632 | static enum GlyphEdge which_edge(int x, int y, int edge_size) | |
328 | { | ||
329 | 1632 | const int edge_max = edge_size - 1; | |
330 | |||
331 |
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1632 | if (!y) |
332 | 408 | return BOTTOM_EDGE; | |
333 |
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1224 | else if (y == edge_max) |
334 | 408 | return TOP_EDGE; | |
335 |
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816 | else if (!x) |
336 | 306 | return LEFT_EDGE; | |
337 |
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510 | else if (x == edge_max) |
338 | 306 | return RIGHT_EDGE; | |
339 | else | ||
340 | 204 | return NO_EDGE; | |
341 | } | ||
342 | |||
343 | 1536 | static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1) | |
344 | { | ||
345 |
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1536 | if ((edge0 == LEFT_EDGE && edge1 == RIGHT_EDGE) || |
346 |
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1476 | (edge1 == LEFT_EDGE && edge0 == RIGHT_EDGE) || |
347 |
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1416 | (edge0 == BOTTOM_EDGE && edge1 != TOP_EDGE) || |
348 |
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288 | (edge1 == BOTTOM_EDGE && edge0 != TOP_EDGE)) |
349 | 600 | return DIR_UP; | |
350 |
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936 | else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) || |
351 |
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288 | (edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE)) |
352 | 480 | return DIR_DOWN; | |
353 |
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456 | else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) || |
354 |
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24 | (edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE)) |
355 | 108 | return DIR_LEFT; | |
356 |
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348 | else if ((edge0 == TOP_EDGE && edge1 == BOTTOM_EDGE) || |
357 |
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252 | (edge1 == TOP_EDGE && edge0 == BOTTOM_EDGE) || |
358 |
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156 | (edge0 == RIGHT_EDGE && edge1 != LEFT_EDGE) || |
359 |
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24 | (edge1 == RIGHT_EDGE && edge0 != LEFT_EDGE)) |
360 | 300 | return DIR_RIGHT; | |
361 | |||
362 | 48 | return NO_DIR; | |
363 | } | ||
364 | |||
365 | /* Interpolate two points. */ | ||
366 | 6600 | static void interp_point(int8_t *points, int x0, int y0, int x1, int y1, | |
367 | int pos, int npoints) | ||
368 | { | ||
369 |
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6600 | if (npoints) { |
370 | 6504 | points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints; | |
371 | 6504 | points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints; | |
372 | } else { | ||
373 | 96 | points[0] = x0; | |
374 | 96 | points[1] = y0; | |
375 | } | ||
376 | 6600 | } | |
377 | |||
378 | /** | ||
379 | * Construct glyphs by iterating through vector coordinates. | ||
380 | * | ||
381 | * @param pglyphs pointer to table where glyphs are stored | ||
382 | * @param xvec pointer to x component of vector coordinates | ||
383 | * @param yvec pointer to y component of vector coordinates | ||
384 | * @param side_length glyph width/height. | ||
385 | */ | ||
386 | 6 | static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec, | |
387 | const int side_length) | ||
388 | { | ||
389 | 6 | const int glyph_size = side_length * side_length; | |
390 | 6 | int8_t *pglyph = pglyphs; | |
391 | |||
392 | int i, j; | ||
393 |
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102 | for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) { |
394 | 96 | int x0 = xvec[i]; | |
395 | 96 | int y0 = yvec[i]; | |
396 | 96 | enum GlyphEdge edge0 = which_edge(x0, y0, side_length); | |
397 | |||
398 |
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1632 | for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) { |
399 | 1536 | int x1 = xvec[j]; | |
400 | 1536 | int y1 = yvec[j]; | |
401 | 1536 | enum GlyphEdge edge1 = which_edge(x1, y1, side_length); | |
402 | 1536 | enum GlyphDir dir = which_direction(edge0, edge1); | |
403 | 1536 | int npoints = FFMAX(FFABS(x1 - x0), FFABS(y1 - y0)); | |
404 | int ipoint; | ||
405 | |||
406 |
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8136 | for (ipoint = 0; ipoint <= npoints; ipoint++) { |
407 | int8_t point[2]; | ||
408 | int irow, icol; | ||
409 | |||
410 | 6600 | interp_point(point, x0, y0, x1, y1, ipoint, npoints); | |
411 | |||
412 |
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6600 | switch (dir) { |
413 | 2832 | case DIR_UP: | |
414 |
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11064 | for (irow = point[1]; irow >= 0; irow--) |
415 | 8232 | pglyph[point[0] + irow * side_length] = 1; | |
416 | 2832 | break; | |
417 | |||
418 | 1968 | case DIR_DOWN: | |
419 |
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6468 | for (irow = point[1]; irow < side_length; irow++) |
420 | 4500 | pglyph[point[0] + irow * side_length] = 1; | |
421 | 1968 | break; | |
422 | |||
423 | 282 | case DIR_LEFT: | |
424 |
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660 | for (icol = point[0]; icol >= 0; icol--) |
425 | 378 | pglyph[icol + point[1] * side_length] = 1; | |
426 | 282 | break; | |
427 | |||
428 | 1434 | case DIR_RIGHT: | |
429 |
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6228 | for (icol = point[0]; icol < side_length; icol++) |
430 | 4794 | pglyph[icol + point[1] * side_length] = 1; | |
431 | 1434 | break; | |
432 | } | ||
433 | } | ||
434 | } | ||
435 | } | ||
436 | 6 | } | |
437 | |||
438 | 6 | static void init_sizes(SANMVideoContext *ctx, int width, int height) | |
439 | { | ||
440 | 6 | ctx->width = width; | |
441 | 6 | ctx->height = height; | |
442 | 6 | ctx->npixels = width * height; | |
443 | |||
444 | 6 | ctx->aligned_width = FFALIGN(width, 8); | |
445 | 6 | ctx->aligned_height = FFALIGN(height, 8); | |
446 | |||
447 | 6 | ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]); | |
448 | 6 | ctx->pitch = width; | |
449 | 6 | } | |
450 | |||
451 | 3 | static void destroy_buffers(SANMVideoContext *ctx) | |
452 | { | ||
453 | 3 | av_freep(&ctx->frm0); | |
454 | 3 | av_freep(&ctx->frm1); | |
455 | 3 | av_freep(&ctx->frm2); | |
456 | 3 | av_freep(&ctx->stored_frame); | |
457 | 3 | av_freep(&ctx->rle_buf); | |
458 | 3 | ctx->frm0_size = | |
459 | 3 | ctx->frm1_size = | |
460 | 3 | ctx->frm2_size = 0; | |
461 | 3 | init_sizes(ctx, 0, 0); | |
462 | 3 | } | |
463 | |||
464 | 3 | static av_cold int init_buffers(SANMVideoContext *ctx) | |
465 | { | ||
466 | 3 | av_fast_padded_mallocz(&ctx->frm0, &ctx->frm0_size, ctx->buf_size); | |
467 | 3 | av_fast_padded_mallocz(&ctx->frm1, &ctx->frm1_size, ctx->buf_size); | |
468 | 3 | av_fast_padded_mallocz(&ctx->frm2, &ctx->frm2_size, ctx->buf_size); | |
469 |
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3 | if (!ctx->version) |
470 | ✗ | av_fast_padded_mallocz(&ctx->stored_frame, | |
471 | ✗ | &ctx->stored_frame_size, ctx->buf_size); | |
472 | |||
473 |
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3 | if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 || |
474 |
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3 | (!ctx->stored_frame && !ctx->version)) { |
475 | ✗ | destroy_buffers(ctx); | |
476 | ✗ | return AVERROR(ENOMEM); | |
477 | } | ||
478 | |||
479 | 3 | return 0; | |
480 | } | ||
481 | |||
482 | 9 | static void rotate_bufs(SANMVideoContext *ctx, int rotate_code) | |
483 | { | ||
484 |
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9 | if (rotate_code == 2) |
485 | 1 | FFSWAP(uint16_t*, ctx->frm1, ctx->frm2); | |
486 | 9 | FFSWAP(uint16_t*, ctx->frm2, ctx->frm0); | |
487 | 9 | } | |
488 | |||
489 | 3 | static av_cold int decode_init(AVCodecContext *avctx) | |
490 | { | ||
491 | 3 | SANMVideoContext *ctx = avctx->priv_data; | |
492 | |||
493 | 3 | ctx->avctx = avctx; | |
494 | 3 | ctx->version = !avctx->extradata_size; | |
495 | // early sanity check before allocations to avoid need for deallocation code. | ||
496 |
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3 | if (!ctx->version && avctx->extradata_size < 1026) { |
497 | ✗ | av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n"); | |
498 | ✗ | return AVERROR_INVALIDDATA; | |
499 | } | ||
500 | |||
501 |
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3 | avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8; |
502 | |||
503 | 3 | init_sizes(ctx, avctx->width, avctx->height); | |
504 |
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3 | if (init_buffers(ctx)) { |
505 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error allocating buffers.\n"); | |
506 | ✗ | return AVERROR(ENOMEM); | |
507 | } | ||
508 | |||
509 | 3 | make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4); | |
510 | 3 | make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8); | |
511 | |||
512 |
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3 | if (!ctx->version) { |
513 | int i; | ||
514 | |||
515 | ✗ | ctx->subversion = AV_RL16(avctx->extradata); | |
516 | ✗ | for (i = 0; i < PALETTE_SIZE; i++) | |
517 | ✗ | ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4); | |
518 | } | ||
519 | |||
520 | 3 | return 0; | |
521 | } | ||
522 | |||
523 | 3 | static av_cold int decode_end(AVCodecContext *avctx) | |
524 | { | ||
525 | 3 | SANMVideoContext *ctx = avctx->priv_data; | |
526 | |||
527 | 3 | destroy_buffers(ctx); | |
528 | |||
529 | 3 | return 0; | |
530 | } | ||
531 | |||
532 | 1 | static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size) | |
533 | { | ||
534 | 1 | int opcode, color, run_len, left = out_size; | |
535 | |||
536 |
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4801 | while (left > 0) { |
537 | 4800 | opcode = bytestream2_get_byte(&ctx->gb); | |
538 | 4800 | run_len = (opcode >> 1) + 1; | |
539 |
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4800 | if (run_len > left || bytestream2_get_bytes_left(&ctx->gb) <= 0) |
540 | ✗ | return AVERROR_INVALIDDATA; | |
541 | |||
542 |
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4800 | if (opcode & 1) { |
543 | 4800 | color = bytestream2_get_byte(&ctx->gb); | |
544 | 4800 | memset(dst, color, run_len); | |
545 | } else { | ||
546 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < run_len) | |
547 | ✗ | return AVERROR_INVALIDDATA; | |
548 | ✗ | bytestream2_get_bufferu(&ctx->gb, dst, run_len); | |
549 | } | ||
550 | |||
551 | 4800 | dst += run_len; | |
552 | 4800 | left -= run_len; | |
553 | } | ||
554 | |||
555 | 1 | return 0; | |
556 | } | ||
557 | |||
558 | ✗ | static int old_codec1(SANMVideoContext *ctx, int top, | |
559 | int left, int width, int height) | ||
560 | { | ||
561 | ✗ | uint8_t *dst = ((uint8_t *)ctx->frm0) + left + top * ctx->pitch; | |
562 | int i, j, len, flag, code, val, pos, end; | ||
563 | |||
564 | ✗ | for (i = 0; i < height; i++) { | |
565 | ✗ | pos = 0; | |
566 | |||
567 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 2) | |
568 | ✗ | return AVERROR_INVALIDDATA; | |
569 | |||
570 | ✗ | len = bytestream2_get_le16u(&ctx->gb); | |
571 | ✗ | end = bytestream2_tell(&ctx->gb) + len; | |
572 | |||
573 | ✗ | while (bytestream2_tell(&ctx->gb) < end) { | |
574 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 2) | |
575 | ✗ | return AVERROR_INVALIDDATA; | |
576 | |||
577 | ✗ | code = bytestream2_get_byteu(&ctx->gb); | |
578 | ✗ | flag = code & 1; | |
579 | ✗ | code = (code >> 1) + 1; | |
580 | ✗ | if (pos + code > width) | |
581 | ✗ | return AVERROR_INVALIDDATA; | |
582 | ✗ | if (flag) { | |
583 | ✗ | val = bytestream2_get_byteu(&ctx->gb); | |
584 | ✗ | if (val) | |
585 | ✗ | memset(dst + pos, val, code); | |
586 | ✗ | pos += code; | |
587 | } else { | ||
588 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < code) | |
589 | ✗ | return AVERROR_INVALIDDATA; | |
590 | ✗ | for (j = 0; j < code; j++) { | |
591 | ✗ | val = bytestream2_get_byteu(&ctx->gb); | |
592 | ✗ | if (val) | |
593 | ✗ | dst[pos] = val; | |
594 | ✗ | pos++; | |
595 | } | ||
596 | } | ||
597 | } | ||
598 | ✗ | dst += ctx->pitch; | |
599 | } | ||
600 | ✗ | ctx->rotate_code = 0; | |
601 | |||
602 | ✗ | return 0; | |
603 | } | ||
604 | |||
605 | ✗ | static inline void codec37_mv(uint8_t *dst, const uint8_t *src, | |
606 | int height, int stride, int x, int y) | ||
607 | { | ||
608 | int pos, i, j; | ||
609 | |||
610 | ✗ | pos = x + y * stride; | |
611 | ✗ | for (j = 0; j < 4; j++) { | |
612 | ✗ | for (i = 0; i < 4; i++) { | |
613 | ✗ | if ((pos + i) < 0 || (pos + i) >= height * stride) | |
614 | ✗ | dst[i] = 0; | |
615 | else | ||
616 | ✗ | dst[i] = src[i]; | |
617 | } | ||
618 | ✗ | dst += stride; | |
619 | ✗ | src += stride; | |
620 | ✗ | pos += stride; | |
621 | } | ||
622 | } | ||
623 | |||
624 | ✗ | static int old_codec37(SANMVideoContext *ctx, int top, | |
625 | int left, int width, int height) | ||
626 | { | ||
627 | ✗ | ptrdiff_t stride = ctx->pitch; | |
628 | int i, j, k, t; | ||
629 | uint8_t *dst, *prev; | ||
630 | ✗ | int skip_run = 0; | |
631 | ✗ | int compr = bytestream2_get_byte(&ctx->gb); | |
632 | ✗ | int mvoff = bytestream2_get_byte(&ctx->gb); | |
633 | ✗ | int seq = bytestream2_get_le16(&ctx->gb); | |
634 | ✗ | uint32_t decoded_size = bytestream2_get_le32(&ctx->gb); | |
635 | int flags; | ||
636 | |||
637 | ✗ | bytestream2_skip(&ctx->gb, 4); | |
638 | ✗ | flags = bytestream2_get_byte(&ctx->gb); | |
639 | ✗ | bytestream2_skip(&ctx->gb, 3); | |
640 | |||
641 | ✗ | if (decoded_size > ctx->height * stride - left - top * stride) { | |
642 | ✗ | decoded_size = ctx->height * stride - left - top * stride; | |
643 | ✗ | av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); | |
644 | } | ||
645 | |||
646 | ✗ | ctx->rotate_code = 0; | |
647 | |||
648 | ✗ | if (((seq & 1) || !(flags & 1)) && (compr && compr != 2)) | |
649 | ✗ | rotate_bufs(ctx, 1); | |
650 | |||
651 | ✗ | dst = ((uint8_t*)ctx->frm0) + left + top * stride; | |
652 | ✗ | prev = ((uint8_t*)ctx->frm2) + left + top * stride; | |
653 | |||
654 | ✗ | if (mvoff > 2) { | |
655 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvoff); | |
656 | ✗ | return AVERROR_INVALIDDATA; | |
657 | } | ||
658 | |||
659 | ✗ | switch (compr) { | |
660 | ✗ | case 0: | |
661 | ✗ | for (i = 0; i < height; i++) { | |
662 | ✗ | bytestream2_get_buffer(&ctx->gb, dst, width); | |
663 | ✗ | dst += stride; | |
664 | } | ||
665 | ✗ | memset(ctx->frm1, 0, ctx->height * stride); | |
666 | ✗ | memset(ctx->frm2, 0, ctx->height * stride); | |
667 | ✗ | break; | |
668 | ✗ | case 2: | |
669 | ✗ | if (rle_decode(ctx, dst, decoded_size)) | |
670 | ✗ | return AVERROR_INVALIDDATA; | |
671 | ✗ | memset(ctx->frm1, 0, ctx->frm1_size); | |
672 | ✗ | memset(ctx->frm2, 0, ctx->frm2_size); | |
673 | ✗ | break; | |
674 | ✗ | case 3: | |
675 | case 4: | ||
676 | ✗ | if (flags & 4) { | |
677 | ✗ | for (j = 0; j < height; j += 4) { | |
678 | ✗ | for (i = 0; i < width; i += 4) { | |
679 | int code; | ||
680 | ✗ | if (skip_run) { | |
681 | ✗ | skip_run--; | |
682 | ✗ | copy_block4(dst + i, prev + i, stride, stride, 4); | |
683 | ✗ | continue; | |
684 | } | ||
685 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
686 | ✗ | return AVERROR_INVALIDDATA; | |
687 | ✗ | code = bytestream2_get_byteu(&ctx->gb); | |
688 | switch (code) { | ||
689 | ✗ | case 0xFF: | |
690 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 16) | |
691 | ✗ | return AVERROR_INVALIDDATA; | |
692 | ✗ | for (k = 0; k < 4; k++) | |
693 | ✗ | bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4); | |
694 | ✗ | break; | |
695 | ✗ | case 0xFE: | |
696 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 4) | |
697 | ✗ | return AVERROR_INVALIDDATA; | |
698 | ✗ | for (k = 0; k < 4; k++) | |
699 | ✗ | memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4); | |
700 | ✗ | break; | |
701 | ✗ | case 0xFD: | |
702 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
703 | ✗ | return AVERROR_INVALIDDATA; | |
704 | ✗ | t = bytestream2_get_byteu(&ctx->gb); | |
705 | ✗ | for (k = 0; k < 4; k++) | |
706 | ✗ | memset(dst + i + k * stride, t, 4); | |
707 | ✗ | break; | |
708 | ✗ | default: | |
709 | ✗ | if (compr == 4 && !code) { | |
710 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
711 | ✗ | return AVERROR_INVALIDDATA; | |
712 | ✗ | skip_run = bytestream2_get_byteu(&ctx->gb) + 1; | |
713 | ✗ | i -= 4; | |
714 | } else { | ||
715 | int mx, my; | ||
716 | |||
717 | ✗ | mx = c37_mv[(mvoff * 255 + code) * 2]; | |
718 | ✗ | my = c37_mv[(mvoff * 255 + code) * 2 + 1]; | |
719 | ✗ | codec37_mv(dst + i, prev + i + mx + my * stride, | |
720 | ctx->height, stride, i + mx, j + my); | ||
721 | } | ||
722 | } | ||
723 | } | ||
724 | ✗ | dst += stride * 4; | |
725 | ✗ | prev += stride * 4; | |
726 | } | ||
727 | } else { | ||
728 | ✗ | for (j = 0; j < height; j += 4) { | |
729 | ✗ | for (i = 0; i < width; i += 4) { | |
730 | int code; | ||
731 | ✗ | if (skip_run) { | |
732 | ✗ | skip_run--; | |
733 | ✗ | copy_block4(dst + i, prev + i, stride, stride, 4); | |
734 | ✗ | continue; | |
735 | } | ||
736 | ✗ | code = bytestream2_get_byte(&ctx->gb); | |
737 | ✗ | if (code == 0xFF) { | |
738 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 16) | |
739 | ✗ | return AVERROR_INVALIDDATA; | |
740 | ✗ | for (k = 0; k < 4; k++) | |
741 | ✗ | bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4); | |
742 | ✗ | } else if (compr == 4 && !code) { | |
743 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
744 | ✗ | return AVERROR_INVALIDDATA; | |
745 | ✗ | skip_run = bytestream2_get_byteu(&ctx->gb) + 1; | |
746 | ✗ | i -= 4; | |
747 | } else { | ||
748 | int mx, my; | ||
749 | |||
750 | ✗ | mx = c37_mv[(mvoff * 255 + code) * 2]; | |
751 | ✗ | my = c37_mv[(mvoff * 255 + code) * 2 + 1]; | |
752 | ✗ | codec37_mv(dst + i, prev + i + mx + my * stride, | |
753 | ctx->height, stride, i + mx, j + my); | ||
754 | } | ||
755 | } | ||
756 | ✗ | dst += stride * 4; | |
757 | ✗ | prev += stride * 4; | |
758 | } | ||
759 | } | ||
760 | ✗ | break; | |
761 | ✗ | default: | |
762 | ✗ | avpriv_report_missing_feature(ctx->avctx, | |
763 | "Subcodec 37 compression %d", compr); | ||
764 | ✗ | return AVERROR_PATCHWELCOME; | |
765 | } | ||
766 | |||
767 | ✗ | return 0; | |
768 | } | ||
769 | |||
770 | ✗ | static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1, | |
771 | uint8_t *prev2, int stride, int tbl, int size) | ||
772 | { | ||
773 | int code, k, t; | ||
774 | uint8_t colors[2]; | ||
775 | int8_t *pglyph; | ||
776 | |||
777 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
778 | ✗ | return AVERROR_INVALIDDATA; | |
779 | |||
780 | ✗ | code = bytestream2_get_byteu(&ctx->gb); | |
781 | ✗ | if (code >= 0xF8) { | |
782 | ✗ | switch (code) { | |
783 | ✗ | case 0xFF: | |
784 | ✗ | if (size == 2) { | |
785 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 4) | |
786 | ✗ | return AVERROR_INVALIDDATA; | |
787 | ✗ | dst[0] = bytestream2_get_byteu(&ctx->gb); | |
788 | ✗ | dst[1] = bytestream2_get_byteu(&ctx->gb); | |
789 | ✗ | dst[0 + stride] = bytestream2_get_byteu(&ctx->gb); | |
790 | ✗ | dst[1 + stride] = bytestream2_get_byteu(&ctx->gb); | |
791 | } else { | ||
792 | ✗ | size >>= 1; | |
793 | ✗ | if (process_block(ctx, dst, prev1, prev2, stride, tbl, size)) | |
794 | ✗ | return AVERROR_INVALIDDATA; | |
795 | ✗ | if (process_block(ctx, dst + size, prev1 + size, prev2 + size, | |
796 | stride, tbl, size)) | ||
797 | ✗ | return AVERROR_INVALIDDATA; | |
798 | ✗ | dst += size * stride; | |
799 | ✗ | prev1 += size * stride; | |
800 | ✗ | prev2 += size * stride; | |
801 | ✗ | if (process_block(ctx, dst, prev1, prev2, stride, tbl, size)) | |
802 | ✗ | return AVERROR_INVALIDDATA; | |
803 | ✗ | if (process_block(ctx, dst + size, prev1 + size, prev2 + size, | |
804 | stride, tbl, size)) | ||
805 | ✗ | return AVERROR_INVALIDDATA; | |
806 | } | ||
807 | ✗ | break; | |
808 | ✗ | case 0xFE: | |
809 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 1) | |
810 | ✗ | return AVERROR_INVALIDDATA; | |
811 | |||
812 | ✗ | t = bytestream2_get_byteu(&ctx->gb); | |
813 | ✗ | for (k = 0; k < size; k++) | |
814 | ✗ | memset(dst + k * stride, t, size); | |
815 | ✗ | break; | |
816 | ✗ | case 0xFD: | |
817 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < 3) | |
818 | ✗ | return AVERROR_INVALIDDATA; | |
819 | |||
820 | ✗ | code = bytestream2_get_byteu(&ctx->gb); | |
821 | ✗ | pglyph = (size == 8) ? ctx->p8x8glyphs[code] : ctx->p4x4glyphs[code]; | |
822 | ✗ | bytestream2_get_bufferu(&ctx->gb, colors, 2); | |
823 | |||
824 | ✗ | for (k = 0; k < size; k++) | |
825 | ✗ | for (t = 0; t < size; t++) | |
826 | ✗ | dst[t + k * stride] = colors[!*pglyph++]; | |
827 | ✗ | break; | |
828 | ✗ | case 0xFC: | |
829 | ✗ | for (k = 0; k < size; k++) | |
830 | ✗ | memcpy(dst + k * stride, prev1 + k * stride, size); | |
831 | ✗ | break; | |
832 | ✗ | default: | |
833 | ✗ | k = bytestream2_tell(&ctx->gb); | |
834 | ✗ | bytestream2_seek(&ctx->gb, tbl + (code & 7), SEEK_SET); | |
835 | ✗ | t = bytestream2_get_byte(&ctx->gb); | |
836 | ✗ | bytestream2_seek(&ctx->gb, k, SEEK_SET); | |
837 | ✗ | for (k = 0; k < size; k++) | |
838 | ✗ | memset(dst + k * stride, t, size); | |
839 | } | ||
840 | } else { | ||
841 | ✗ | int mx = motion_vectors[code][0]; | |
842 | ✗ | int my = motion_vectors[code][1]; | |
843 | ✗ | int index = prev2 - (const uint8_t *)ctx->frm2; | |
844 | |||
845 | av_assert2(index >= 0 && index < (ctx->buf_size >> 1)); | ||
846 | |||
847 | ✗ | if (index < -mx - my * stride || | |
848 | ✗ | (ctx->buf_size >> 1) - index < mx + size + (my + size - 1) * stride) { | |
849 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "MV is invalid.\n"); | |
850 | ✗ | return AVERROR_INVALIDDATA; | |
851 | } | ||
852 | |||
853 | ✗ | for (k = 0; k < size; k++) | |
854 | ✗ | memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size); | |
855 | } | ||
856 | |||
857 | ✗ | return 0; | |
858 | } | ||
859 | |||
860 | ✗ | static int old_codec47(SANMVideoContext *ctx, int top, | |
861 | int left, int width, int height) | ||
862 | { | ||
863 | uint32_t decoded_size; | ||
864 | int i, j; | ||
865 | ✗ | ptrdiff_t stride = ctx->pitch; | |
866 | ✗ | uint8_t *dst = (uint8_t *)ctx->frm0 + left + top * stride; | |
867 | ✗ | uint8_t *prev1 = (uint8_t *)ctx->frm1; | |
868 | ✗ | uint8_t *prev2 = (uint8_t *)ctx->frm2; | |
869 | ✗ | int tbl_pos = bytestream2_tell(&ctx->gb); | |
870 | ✗ | int seq = bytestream2_get_le16(&ctx->gb); | |
871 | ✗ | int compr = bytestream2_get_byte(&ctx->gb); | |
872 | ✗ | int new_rot = bytestream2_get_byte(&ctx->gb); | |
873 | ✗ | int skip = bytestream2_get_byte(&ctx->gb); | |
874 | |||
875 | ✗ | bytestream2_skip(&ctx->gb, 9); | |
876 | ✗ | decoded_size = bytestream2_get_le32(&ctx->gb); | |
877 | ✗ | bytestream2_skip(&ctx->gb, 8); | |
878 | |||
879 | ✗ | if (decoded_size > ctx->height * stride - left - top * stride) { | |
880 | ✗ | decoded_size = ctx->height * stride - left - top * stride; | |
881 | ✗ | av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); | |
882 | } | ||
883 | |||
884 | ✗ | if (skip & 1) | |
885 | ✗ | bytestream2_skip(&ctx->gb, 0x8080); | |
886 | ✗ | if (!seq) { | |
887 | ✗ | ctx->prev_seq = -1; | |
888 | ✗ | memset(prev1, 0, ctx->height * stride); | |
889 | ✗ | memset(prev2, 0, ctx->height * stride); | |
890 | } | ||
891 | |||
892 | ✗ | switch (compr) { | |
893 | ✗ | case 0: | |
894 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < width * height) | |
895 | ✗ | return AVERROR_INVALIDDATA; | |
896 | ✗ | for (j = 0; j < height; j++) { | |
897 | ✗ | bytestream2_get_bufferu(&ctx->gb, dst, width); | |
898 | ✗ | dst += stride; | |
899 | } | ||
900 | ✗ | break; | |
901 | ✗ | case 1: | |
902 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1)) | |
903 | ✗ | return AVERROR_INVALIDDATA; | |
904 | ✗ | for (j = 0; j < height; j += 2) { | |
905 | ✗ | for (i = 0; i < width; i += 2) { | |
906 | ✗ | dst[i] = | |
907 | ✗ | dst[i + 1] = | |
908 | ✗ | dst[stride + i] = | |
909 | ✗ | dst[stride + i + 1] = bytestream2_get_byteu(&ctx->gb); | |
910 | } | ||
911 | ✗ | dst += stride * 2; | |
912 | } | ||
913 | ✗ | break; | |
914 | ✗ | case 2: | |
915 | ✗ | if (seq == ctx->prev_seq + 1) { | |
916 | ✗ | for (j = 0; j < height; j += 8) { | |
917 | ✗ | for (i = 0; i < width; i += 8) | |
918 | ✗ | if (process_block(ctx, dst + i, prev1 + i, prev2 + i, stride, | |
919 | tbl_pos + 8, 8)) | ||
920 | ✗ | return AVERROR_INVALIDDATA; | |
921 | ✗ | dst += stride * 8; | |
922 | ✗ | prev1 += stride * 8; | |
923 | ✗ | prev2 += stride * 8; | |
924 | } | ||
925 | } | ||
926 | ✗ | break; | |
927 | ✗ | case 3: | |
928 | ✗ | memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height); | |
929 | ✗ | break; | |
930 | ✗ | case 4: | |
931 | ✗ | memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height); | |
932 | ✗ | break; | |
933 | ✗ | case 5: | |
934 | ✗ | if (rle_decode(ctx, dst, decoded_size)) | |
935 | ✗ | return AVERROR_INVALIDDATA; | |
936 | ✗ | break; | |
937 | ✗ | default: | |
938 | ✗ | avpriv_report_missing_feature(ctx->avctx, | |
939 | "Subcodec 47 compression %d", compr); | ||
940 | ✗ | return AVERROR_PATCHWELCOME; | |
941 | } | ||
942 | ✗ | if (seq == ctx->prev_seq + 1) | |
943 | ✗ | ctx->rotate_code = new_rot; | |
944 | else | ||
945 | ✗ | ctx->rotate_code = 0; | |
946 | ✗ | ctx->prev_seq = seq; | |
947 | |||
948 | ✗ | return 0; | |
949 | } | ||
950 | |||
951 | ✗ | static int process_frame_obj(SANMVideoContext *ctx) | |
952 | { | ||
953 | ✗ | uint16_t codec = bytestream2_get_le16u(&ctx->gb); | |
954 | ✗ | uint16_t left = bytestream2_get_le16u(&ctx->gb); | |
955 | ✗ | uint16_t top = bytestream2_get_le16u(&ctx->gb); | |
956 | ✗ | uint16_t w = bytestream2_get_le16u(&ctx->gb); | |
957 | ✗ | uint16_t h = bytestream2_get_le16u(&ctx->gb); | |
958 | |||
959 | ✗ | if (!w || !h) { | |
960 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Dimensions are invalid.\n"); | |
961 | ✗ | return AVERROR_INVALIDDATA; | |
962 | } | ||
963 | |||
964 | ✗ | if (ctx->width < left + w || ctx->height < top + h) { | |
965 | ✗ | int ret = ff_set_dimensions(ctx->avctx, FFMAX(left + w, ctx->width), | |
966 | ✗ | FFMAX(top + h, ctx->height)); | |
967 | ✗ | if (ret < 0) | |
968 | ✗ | return ret; | |
969 | ✗ | init_sizes(ctx, FFMAX(left + w, ctx->width), | |
970 | ✗ | FFMAX(top + h, ctx->height)); | |
971 | ✗ | if (init_buffers(ctx)) { | |
972 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Error resizing buffers.\n"); | |
973 | ✗ | return AVERROR(ENOMEM); | |
974 | } | ||
975 | } | ||
976 | ✗ | bytestream2_skip(&ctx->gb, 4); | |
977 | |||
978 | ✗ | switch (codec) { | |
979 | ✗ | case 1: | |
980 | case 3: | ||
981 | ✗ | return old_codec1(ctx, top, left, w, h); | |
982 | ✗ | case 37: | |
983 | ✗ | return old_codec37(ctx, top, left, w, h); | |
984 | ✗ | case 47: | |
985 | ✗ | return old_codec47(ctx, top, left, w, h); | |
986 | ✗ | default: | |
987 | ✗ | avpriv_request_sample(ctx->avctx, "Subcodec %d", codec); | |
988 | ✗ | return AVERROR_PATCHWELCOME; | |
989 | } | ||
990 | } | ||
991 | |||
992 | ✗ | static int decode_0(SANMVideoContext *ctx) | |
993 | { | ||
994 | ✗ | uint16_t *frm = ctx->frm0; | |
995 | int x, y; | ||
996 | |||
997 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < ctx->width * ctx->height * 2) { | |
998 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for raw frame.\n"); | |
999 | ✗ | return AVERROR_INVALIDDATA; | |
1000 | } | ||
1001 | ✗ | for (y = 0; y < ctx->height; y++) { | |
1002 | ✗ | for (x = 0; x < ctx->width; x++) | |
1003 | ✗ | frm[x] = bytestream2_get_le16u(&ctx->gb); | |
1004 | ✗ | frm += ctx->pitch; | |
1005 | } | ||
1006 | ✗ | return 0; | |
1007 | } | ||
1008 | |||
1009 | ✗ | static int decode_nop(SANMVideoContext *ctx) | |
1010 | { | ||
1011 | ✗ | avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type"); | |
1012 | ✗ | return AVERROR_PATCHWELCOME; | |
1013 | } | ||
1014 | |||
1015 | 42964 | static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, ptrdiff_t pitch) | |
1016 | { | ||
1017 | 42964 | uint8_t *dst = (uint8_t *)pdest; | |
1018 | 42964 | uint8_t *src = (uint8_t *)psrc; | |
1019 | 42964 | ptrdiff_t stride = pitch * 2; | |
1020 | |||
1021 |
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42964 | switch (block_size) { |
1022 | 14526 | case 2: | |
1023 | 14526 | copy_block4(dst, src, stride, stride, 2); | |
1024 | 14526 | break; | |
1025 | 12400 | case 4: | |
1026 | 12400 | copy_block8(dst, src, stride, stride, 4); | |
1027 | 12400 | break; | |
1028 | 16038 | case 8: | |
1029 | 16038 | copy_block16(dst, src, stride, stride, 8); | |
1030 | 16038 | break; | |
1031 | } | ||
1032 | 42964 | } | |
1033 | |||
1034 | 7913 | static void fill_block(uint16_t *pdest, uint16_t color, int block_size, ptrdiff_t pitch) | |
1035 | { | ||
1036 | int x, y; | ||
1037 | |||
1038 | 7913 | pitch -= block_size; | |
1039 |
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38351 | for (y = 0; y < block_size; y++, pdest += pitch) |
1040 |
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179978 | for (x = 0; x < block_size; x++) |
1041 | 149540 | *pdest++ = color; | |
1042 | 7913 | } | |
1043 | |||
1044 | 8368 | static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index, | |
1045 | uint16_t fg_color, uint16_t bg_color, int block_size, | ||
1046 | ptrdiff_t pitch) | ||
1047 | { | ||
1048 | int8_t *pglyph; | ||
1049 | 8368 | uint16_t colors[2] = { fg_color, bg_color }; | |
1050 | int x, y; | ||
1051 | |||
1052 |
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8368 | if (index >= NGLYPHS) { |
1053 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Ignoring nonexistent glyph #%u.\n", index); | |
1054 | ✗ | return AVERROR_INVALIDDATA; | |
1055 | } | ||
1056 | |||
1057 |
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8368 | pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index]; |
1058 | 8368 | pitch -= block_size; | |
1059 | |||
1060 |
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46472 | for (y = 0; y < block_size; y++, dst += pitch) |
1061 |
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227576 | for (x = 0; x < block_size; x++) |
1062 | 189472 | *dst++ = colors[*pglyph++]; | |
1063 | 8368 | return 0; | |
1064 | } | ||
1065 | |||
1066 | 8029 | static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, ptrdiff_t pitch) | |
1067 | { | ||
1068 | 8029 | uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch; | |
1069 | |||
1070 |
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8029 | if (block_size == 2) { |
1071 | uint32_t indices; | ||
1072 | |||
1073 |
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825 | if (bytestream2_get_bytes_left(&ctx->gb) < 4) |
1074 | ✗ | return AVERROR_INVALIDDATA; | |
1075 | |||
1076 | 825 | indices = bytestream2_get_le32u(&ctx->gb); | |
1077 | 825 | dst[0] = ctx->codebook[indices & 0xFF]; | |
1078 | 825 | indices >>= 8; | |
1079 | 825 | dst[1] = ctx->codebook[indices & 0xFF]; | |
1080 | 825 | indices >>= 8; | |
1081 | 825 | dst[pitch] = ctx->codebook[indices & 0xFF]; | |
1082 | 825 | indices >>= 8; | |
1083 | 825 | dst[pitch + 1] = ctx->codebook[indices & 0xFF]; | |
1084 | } else { | ||
1085 | uint16_t fgcolor, bgcolor; | ||
1086 | int glyph; | ||
1087 | |||
1088 |
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7204 | if (bytestream2_get_bytes_left(&ctx->gb) < 3) |
1089 | 1 | return AVERROR_INVALIDDATA; | |
1090 | |||
1091 | 7203 | glyph = bytestream2_get_byteu(&ctx->gb); | |
1092 | 7203 | bgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; | |
1093 | 7203 | fgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; | |
1094 | |||
1095 | 7203 | draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch); | |
1096 | } | ||
1097 | 8028 | return 0; | |
1098 | } | ||
1099 | |||
1100 | 1169 | static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, ptrdiff_t pitch) | |
1101 | { | ||
1102 | 1169 | uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch; | |
1103 | |||
1104 |
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1169 | if (block_size == 2) { |
1105 |
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4 | if (bytestream2_get_bytes_left(&ctx->gb) < 8) |
1106 | ✗ | return AVERROR_INVALIDDATA; | |
1107 | |||
1108 | 4 | dst[0] = bytestream2_get_le16u(&ctx->gb); | |
1109 | 4 | dst[1] = bytestream2_get_le16u(&ctx->gb); | |
1110 | 4 | dst[pitch] = bytestream2_get_le16u(&ctx->gb); | |
1111 | 4 | dst[pitch + 1] = bytestream2_get_le16u(&ctx->gb); | |
1112 | } else { | ||
1113 | uint16_t fgcolor, bgcolor; | ||
1114 | int glyph; | ||
1115 | |||
1116 |
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1165 | if (bytestream2_get_bytes_left(&ctx->gb) < 5) |
1117 | ✗ | return AVERROR_INVALIDDATA; | |
1118 | |||
1119 | 1165 | glyph = bytestream2_get_byteu(&ctx->gb); | |
1120 | 1165 | bgcolor = bytestream2_get_le16u(&ctx->gb); | |
1121 | 1165 | fgcolor = bytestream2_get_le16u(&ctx->gb); | |
1122 | |||
1123 | 1165 | draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch); | |
1124 | } | ||
1125 | 1169 | return 0; | |
1126 | } | ||
1127 | |||
1128 | 30376 | static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my, | |
1129 | int block_size) | ||
1130 | { | ||
1131 | 30376 | int start_pos = cx + mx + (cy + my) * ctx->pitch; | |
1132 | 30376 | int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1); | |
1133 | |||
1134 |
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30376 | int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1); |
1135 | |||
1136 |
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|
30376 | if (!good) |
1137 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
1138 | "Ignoring invalid motion vector (%i, %i)->(%u, %u), block size = %u\n", | ||
1139 | cx + mx, cy + my, cx, cy, block_size); | ||
1140 | |||
1141 | 30376 | return good; | |
1142 | } | ||
1143 | |||
1144 | 71636 | static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size) | |
1145 | { | ||
1146 | int16_t mx, my, index; | ||
1147 | int opcode; | ||
1148 | |||
1149 |
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|
71636 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
1150 | 1 | return AVERROR_INVALIDDATA; | |
1151 | |||
1152 | 71635 | opcode = bytestream2_get_byteu(&ctx->gb); | |
1153 | |||
1154 |
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|
71635 | switch (opcode) { |
1155 | 28212 | default: | |
1156 | 28212 | mx = motion_vectors[opcode][0]; | |
1157 | 28212 | my = motion_vectors[opcode][1]; | |
1158 | |||
1159 |
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|
28212 | if (good_mvec(ctx, cx, cy, mx, my, blk_size)) { |
1160 | 28212 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, | |
1161 | 28212 | ctx->frm2 + cx + mx + ctx->pitch * (cy + my), | |
1162 | blk_size, ctx->pitch); | ||
1163 | } | ||
1164 | 28212 | break; | |
1165 | 2164 | case 0xF5: | |
1166 |
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|
2164 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
1167 | ✗ | return AVERROR_INVALIDDATA; | |
1168 | 2164 | index = bytestream2_get_le16u(&ctx->gb); | |
1169 | |||
1170 | 2164 | mx = index % ctx->width; | |
1171 | 2164 | my = index / ctx->width; | |
1172 | |||
1173 |
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|
2164 | if (good_mvec(ctx, cx, cy, mx, my, blk_size)) { |
1174 | 2164 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, | |
1175 | 2164 | ctx->frm2 + cx + mx + ctx->pitch * (cy + my), | |
1176 | blk_size, ctx->pitch); | ||
1177 | } | ||
1178 | 2164 | break; | |
1179 | 12588 | case 0xF6: | |
1180 | 12588 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, | |
1181 | 12588 | ctx->frm1 + cx + ctx->pitch * cy, | |
1182 | blk_size, ctx->pitch); | ||
1183 | 12588 | break; | |
1184 | 8029 | case 0xF7: | |
1185 | 8029 | opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch); | |
1186 | 8029 | break; | |
1187 | |||
1188 | 1169 | case 0xF8: | |
1189 | 1169 | opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch); | |
1190 | 1169 | break; | |
1191 | 315 | case 0xF9: | |
1192 | case 0xFA: | ||
1193 | case 0xFB: | ||
1194 | case 0xFC: | ||
1195 | 315 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, | |
1196 | 315 | ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch); | |
1197 | 315 | break; | |
1198 | 5496 | case 0xFD: | |
1199 |
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|
5496 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
1200 | ✗ | return AVERROR_INVALIDDATA; | |
1201 | 10992 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, | |
1202 | 5496 | ctx->codebook[bytestream2_get_byteu(&ctx->gb)], blk_size, ctx->pitch); | |
1203 | 5496 | break; | |
1204 | 2102 | case 0xFE: | |
1205 |
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|
2102 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
1206 | ✗ | return AVERROR_INVALIDDATA; | |
1207 | 2102 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, | |
1208 | 2102 | bytestream2_get_le16u(&ctx->gb), blk_size, ctx->pitch); | |
1209 | 2102 | break; | |
1210 | 11560 | case 0xFF: | |
1211 |
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|
11560 | if (blk_size == 2) { |
1212 | ✗ | opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch); | |
1213 | } else { | ||
1214 | 11560 | blk_size >>= 1; | |
1215 |
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|
11560 | if (codec2subblock(ctx, cx, cy, blk_size)) |
1216 | ✗ | return AVERROR_INVALIDDATA; | |
1217 |
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|
11560 | if (codec2subblock(ctx, cx + blk_size, cy, blk_size)) |
1218 | ✗ | return AVERROR_INVALIDDATA; | |
1219 |
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|
11560 | if (codec2subblock(ctx, cx, cy + blk_size, blk_size)) |
1220 | ✗ | return AVERROR_INVALIDDATA; | |
1221 |
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|
11560 | if (codec2subblock(ctx, cx + blk_size, cy + blk_size, blk_size)) |
1222 | ✗ | return AVERROR_INVALIDDATA; | |
1223 | } | ||
1224 | 11560 | break; | |
1225 | } | ||
1226 | 71635 | return 0; | |
1227 | } | ||
1228 | |||
1229 | 6 | static int decode_2(SANMVideoContext *ctx) | |
1230 | { | ||
1231 | int cx, cy, ret; | ||
1232 | |||
1233 |
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|
323 | for (cy = 0; cy < ctx->aligned_height; cy += 8) |
1234 |
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25713 | for (cx = 0; cx < ctx->aligned_width; cx += 8) |
1235 |
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25396 | if (ret = codec2subblock(ctx, cx, cy, 8)) |
1236 | 1 | return ret; | |
1237 | |||
1238 | 5 | return 0; | |
1239 | } | ||
1240 | |||
1241 | ✗ | static int decode_3(SANMVideoContext *ctx) | |
1242 | { | ||
1243 | ✗ | memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size); | |
1244 | ✗ | return 0; | |
1245 | } | ||
1246 | |||
1247 | 9 | static int decode_4(SANMVideoContext *ctx) | |
1248 | { | ||
1249 | 9 | memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size); | |
1250 | 9 | return 0; | |
1251 | } | ||
1252 | |||
1253 | 1 | static int decode_5(SANMVideoContext *ctx) | |
1254 | { | ||
1255 | #if HAVE_BIGENDIAN | ||
1256 | uint16_t *frm; | ||
1257 | int npixels; | ||
1258 | #endif | ||
1259 | 1 | uint8_t *dst = (uint8_t*)ctx->frm0; | |
1260 | |||
1261 |
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|
1 | if (rle_decode(ctx, dst, ctx->buf_size)) |
1262 | ✗ | return AVERROR_INVALIDDATA; | |
1263 | |||
1264 | #if HAVE_BIGENDIAN | ||
1265 | npixels = ctx->npixels; | ||
1266 | frm = ctx->frm0; | ||
1267 | while (npixels--) { | ||
1268 | *frm = av_bswap16(*frm); | ||
1269 | frm++; | ||
1270 | } | ||
1271 | #endif | ||
1272 | |||
1273 | 1 | return 0; | |
1274 | } | ||
1275 | |||
1276 | ✗ | static int decode_6(SANMVideoContext *ctx) | |
1277 | { | ||
1278 | ✗ | int npixels = ctx->npixels; | |
1279 | ✗ | uint16_t *frm = ctx->frm0; | |
1280 | |||
1281 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < npixels) { | |
1282 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for frame.\n"); | |
1283 | ✗ | return AVERROR_INVALIDDATA; | |
1284 | } | ||
1285 | ✗ | while (npixels--) | |
1286 | ✗ | *frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; | |
1287 | |||
1288 | ✗ | return 0; | |
1289 | } | ||
1290 | |||
1291 | ✗ | static int decode_8(SANMVideoContext *ctx) | |
1292 | { | ||
1293 | ✗ | uint16_t *pdest = ctx->frm0; | |
1294 | uint8_t *rsrc; | ||
1295 | ✗ | long npixels = ctx->npixels; | |
1296 | |||
1297 | ✗ | av_fast_malloc(&ctx->rle_buf, &ctx->rle_buf_size, npixels); | |
1298 | ✗ | if (!ctx->rle_buf) { | |
1299 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "RLE buffer allocation failed.\n"); | |
1300 | ✗ | return AVERROR(ENOMEM); | |
1301 | } | ||
1302 | ✗ | rsrc = ctx->rle_buf; | |
1303 | |||
1304 | ✗ | if (rle_decode(ctx, rsrc, npixels)) | |
1305 | ✗ | return AVERROR_INVALIDDATA; | |
1306 | |||
1307 | ✗ | while (npixels--) | |
1308 | ✗ | *pdest++ = ctx->codebook[*rsrc++]; | |
1309 | |||
1310 | ✗ | return 0; | |
1311 | } | ||
1312 | |||
1313 | typedef int (*frm_decoder)(SANMVideoContext *ctx); | ||
1314 | |||
1315 | static const frm_decoder v1_decoders[] = { | ||
1316 | decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5, | ||
1317 | decode_6, decode_nop, decode_8 | ||
1318 | }; | ||
1319 | |||
1320 | 16 | static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr) | |
1321 | { | ||
1322 | int i, ret; | ||
1323 | |||
1324 |
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16 | if ((ret = bytestream2_get_bytes_left(&ctx->gb)) < 560) { |
1325 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Input frame too short (%d bytes).\n", | |
1326 | ret); | ||
1327 | ✗ | return AVERROR_INVALIDDATA; | |
1328 | } | ||
1329 | 16 | bytestream2_skip(&ctx->gb, 8); // skip pad | |
1330 | |||
1331 | 16 | hdr->width = bytestream2_get_le32u(&ctx->gb); | |
1332 | 16 | hdr->height = bytestream2_get_le32u(&ctx->gb); | |
1333 | |||
1334 |
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16 | if (hdr->width != ctx->width || hdr->height != ctx->height) { |
1335 | ✗ | avpriv_report_missing_feature(ctx->avctx, "Variable size frames"); | |
1336 | ✗ | return AVERROR_PATCHWELCOME; | |
1337 | } | ||
1338 | |||
1339 | 16 | hdr->seq_num = bytestream2_get_le16u(&ctx->gb); | |
1340 | 16 | hdr->codec = bytestream2_get_byteu(&ctx->gb); | |
1341 | 16 | hdr->rotate_code = bytestream2_get_byteu(&ctx->gb); | |
1342 | |||
1343 | 16 | bytestream2_skip(&ctx->gb, 4); // skip pad | |
1344 | |||
1345 |
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|
80 | for (i = 0; i < 4; i++) |
1346 | 64 | ctx->small_codebook[i] = bytestream2_get_le16u(&ctx->gb); | |
1347 | 16 | hdr->bg_color = bytestream2_get_le16u(&ctx->gb); | |
1348 | |||
1349 | 16 | bytestream2_skip(&ctx->gb, 2); // skip pad | |
1350 | |||
1351 | 16 | hdr->rle_output_size = bytestream2_get_le32u(&ctx->gb); | |
1352 |
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4112 | for (i = 0; i < 256; i++) |
1353 | 4096 | ctx->codebook[i] = bytestream2_get_le16u(&ctx->gb); | |
1354 | |||
1355 | 16 | bytestream2_skip(&ctx->gb, 8); // skip pad | |
1356 | |||
1357 | 16 | return 0; | |
1358 | } | ||
1359 | |||
1360 | 2 | static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color) | |
1361 | { | ||
1362 |
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2 | if (buf_size--) { |
1363 | 2 | *pbuf++ = color; | |
1364 | 2 | av_memcpy_backptr((uint8_t*)pbuf, 2, 2*buf_size); | |
1365 | } | ||
1366 | 2 | } | |
1367 | |||
1368 | 15 | static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr) | |
1369 | { | ||
1370 | uint8_t *dst; | ||
1371 | 15 | const uint8_t *src = (uint8_t*) ctx->frm0; | |
1372 | 15 | int ret, height = ctx->height; | |
1373 |
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15 | ptrdiff_t dstpitch, srcpitch = ctx->pitch * (hdr ? sizeof(ctx->frm0[0]) : 1); |
1374 | |||
1375 |
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15 | if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0) |
1376 | ✗ | return ret; | |
1377 | |||
1378 | 15 | dst = ctx->frame->data[0]; | |
1379 | 15 | dstpitch = ctx->frame->linesize[0]; | |
1380 | |||
1381 |
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|
7215 | while (height--) { |
1382 | 7200 | memcpy(dst, src, srcpitch); | |
1383 | 7200 | src += srcpitch; | |
1384 | 7200 | dst += dstpitch; | |
1385 | } | ||
1386 | |||
1387 | 15 | return 0; | |
1388 | } | ||
1389 | |||
1390 | 16 | static int decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
1391 | int *got_frame_ptr, AVPacket *pkt) | ||
1392 | { | ||
1393 | 16 | SANMVideoContext *ctx = avctx->priv_data; | |
1394 | int i, ret; | ||
1395 | |||
1396 | 16 | ctx->frame = frame; | |
1397 | 16 | bytestream2_init(&ctx->gb, pkt->data, pkt->size); | |
1398 | |||
1399 |
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|
16 | if (!ctx->version) { |
1400 | ✗ | int to_store = 0; | |
1401 | |||
1402 | ✗ | while (bytestream2_get_bytes_left(&ctx->gb) >= 8) { | |
1403 | uint32_t sig, size; | ||
1404 | int pos; | ||
1405 | |||
1406 | ✗ | sig = bytestream2_get_be32u(&ctx->gb); | |
1407 | ✗ | size = bytestream2_get_be32u(&ctx->gb); | |
1408 | ✗ | pos = bytestream2_tell(&ctx->gb); | |
1409 | |||
1410 | ✗ | if (bytestream2_get_bytes_left(&ctx->gb) < size) { | |
1411 | ✗ | av_log(avctx, AV_LOG_ERROR, "Incorrect chunk size %"PRIu32".\n", size); | |
1412 | ✗ | break; | |
1413 | } | ||
1414 | ✗ | switch (sig) { | |
1415 | ✗ | case MKBETAG('N', 'P', 'A', 'L'): | |
1416 | ✗ | if (size != PALETTE_SIZE * 3) { | |
1417 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
1418 | "Incorrect palette block size %"PRIu32".\n", size); | ||
1419 | ✗ | return AVERROR_INVALIDDATA; | |
1420 | } | ||
1421 | ✗ | for (i = 0; i < PALETTE_SIZE; i++) | |
1422 | ✗ | ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); | |
1423 | ✗ | break; | |
1424 | ✗ | case MKBETAG('F', 'O', 'B', 'J'): | |
1425 | ✗ | if (size < 16) | |
1426 | ✗ | return AVERROR_INVALIDDATA; | |
1427 | ✗ | if (ret = process_frame_obj(ctx)) | |
1428 | ✗ | return ret; | |
1429 | ✗ | break; | |
1430 | ✗ | case MKBETAG('X', 'P', 'A', 'L'): | |
1431 | ✗ | if (size == 6 || size == 4) { | |
1432 | uint8_t tmp[3]; | ||
1433 | int j; | ||
1434 | |||
1435 | ✗ | for (i = 0; i < PALETTE_SIZE; i++) { | |
1436 | ✗ | for (j = 0; j < 3; j++) { | |
1437 | ✗ | int t = (ctx->pal[i] >> (16 - j * 8)) & 0xFF; | |
1438 | ✗ | tmp[j] = av_clip_uint8((t * 129 + ctx->delta_pal[i * 3 + j]) >> 7); | |
1439 | } | ||
1440 | ✗ | ctx->pal[i] = 0xFFU << 24 | AV_RB24(tmp); | |
1441 | } | ||
1442 | } else { | ||
1443 | ✗ | if (size < PALETTE_DELTA * 2 + 4) { | |
1444 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
1445 | "Incorrect palette change block size %"PRIu32".\n", | ||
1446 | size); | ||
1447 | ✗ | return AVERROR_INVALIDDATA; | |
1448 | } | ||
1449 | ✗ | bytestream2_skipu(&ctx->gb, 4); | |
1450 | ✗ | for (i = 0; i < PALETTE_DELTA; i++) | |
1451 | ✗ | ctx->delta_pal[i] = bytestream2_get_le16u(&ctx->gb); | |
1452 | ✗ | if (size >= PALETTE_DELTA * 5 + 4) { | |
1453 | ✗ | for (i = 0; i < PALETTE_SIZE; i++) | |
1454 | ✗ | ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); | |
1455 | } else { | ||
1456 | ✗ | memset(ctx->pal, 0, sizeof(ctx->pal)); | |
1457 | } | ||
1458 | } | ||
1459 | ✗ | break; | |
1460 | ✗ | case MKBETAG('S', 'T', 'O', 'R'): | |
1461 | ✗ | to_store = 1; | |
1462 | ✗ | break; | |
1463 | ✗ | case MKBETAG('F', 'T', 'C', 'H'): | |
1464 | ✗ | memcpy(ctx->frm0, ctx->stored_frame, ctx->buf_size); | |
1465 | ✗ | break; | |
1466 | ✗ | default: | |
1467 | ✗ | bytestream2_skip(&ctx->gb, size); | |
1468 | ✗ | av_log(avctx, AV_LOG_DEBUG, | |
1469 | "Unknown/unsupported chunk %"PRIx32".\n", sig); | ||
1470 | ✗ | break; | |
1471 | } | ||
1472 | |||
1473 | ✗ | bytestream2_seek(&ctx->gb, pos + size, SEEK_SET); | |
1474 | ✗ | if (size & 1) | |
1475 | ✗ | bytestream2_skip(&ctx->gb, 1); | |
1476 | } | ||
1477 | ✗ | if (to_store) | |
1478 | ✗ | memcpy(ctx->stored_frame, ctx->frm0, ctx->buf_size); | |
1479 | ✗ | if ((ret = copy_output(ctx, NULL))) | |
1480 | ✗ | return ret; | |
1481 | ✗ | memcpy(ctx->frame->data[1], ctx->pal, 1024); | |
1482 | } else { | ||
1483 | SANMFrameHeader header; | ||
1484 | |||
1485 |
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|
16 | if ((ret = read_frame_header(ctx, &header))) |
1486 | 1 | return ret; | |
1487 | |||
1488 | 16 | ctx->rotate_code = header.rotate_code; | |
1489 |
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|
16 | if ((ctx->frame->key_frame = !header.seq_num)) { |
1490 | 1 | ctx->frame->pict_type = AV_PICTURE_TYPE_I; | |
1491 | 1 | fill_frame(ctx->frm1, ctx->npixels, header.bg_color); | |
1492 | 1 | fill_frame(ctx->frm2, ctx->npixels, header.bg_color); | |
1493 | } else { | ||
1494 | 15 | ctx->frame->pict_type = AV_PICTURE_TYPE_P; | |
1495 | } | ||
1496 | |||
1497 |
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|
16 | if (header.codec < FF_ARRAY_ELEMS(v1_decoders)) { |
1498 |
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|
16 | if ((ret = v1_decoders[header.codec](ctx))) { |
1499 | 1 | av_log(avctx, AV_LOG_ERROR, | |
1500 | "Subcodec %d: error decoding frame.\n", header.codec); | ||
1501 | 1 | return ret; | |
1502 | } | ||
1503 | } else { | ||
1504 | ✗ | avpriv_request_sample(avctx, "Subcodec %d", header.codec); | |
1505 | ✗ | return AVERROR_PATCHWELCOME; | |
1506 | } | ||
1507 | |||
1508 |
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|
15 | if ((ret = copy_output(ctx, &header))) |
1509 | ✗ | return ret; | |
1510 | } | ||
1511 |
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|
15 | if (ctx->rotate_code) |
1512 | 9 | rotate_bufs(ctx, ctx->rotate_code); | |
1513 | |||
1514 | 15 | *got_frame_ptr = 1; | |
1515 | |||
1516 | 15 | return pkt->size; | |
1517 | } | ||
1518 | |||
1519 | const FFCodec ff_sanm_decoder = { | ||
1520 | .p.name = "sanm", | ||
1521 | .p.long_name = NULL_IF_CONFIG_SMALL("LucasArts SANM/Smush video"), | ||
1522 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
1523 | .p.id = AV_CODEC_ID_SANM, | ||
1524 | .priv_data_size = sizeof(SANMVideoContext), | ||
1525 | .init = decode_init, | ||
1526 | .close = decode_end, | ||
1527 | FF_CODEC_DECODE_CB(decode_frame), | ||
1528 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
1529 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
1530 | }; | ||
1531 |