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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / sanm.c
CommitLineData
2ba45a60
DM		 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
37static 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
41static 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
45static 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
49static 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
53static 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
107static 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
263typedef 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
296typedef 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
303enum GlyphEdge {
304 LEFT_EDGE,
305 TOP_EDGE,
306 RIGHT_EDGE,
307 BOTTOM_EDGE,
308 NO_EDGE
309};
310
311enum 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 */
326static 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
342static 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. */
365static 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 */
385static 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
437static 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
450static 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
462static 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
480static 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
487static 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
521static 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
530static 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
556static 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
603static 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
622static 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
768static 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
858static 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
949static 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
993static 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
1010static int decode_nop(SANMVideoContext *ctx)
1011{
1012 avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type");
1013 return AVERROR_PATCHWELCOME;
1014}
1015
1016static 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
1035static 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
1045static 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
1067static 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
1101static 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
1129static 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
1145static 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
1230static 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
1242static int decode_3(SANMVideoContext *ctx)
1243{
1244 memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size);
1245 return 0;
1246}
1247
1248static int decode_4(SANMVideoContext *ctx)
1249{
1250 memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size);
1251 return 0;
1252}
1253
1254static 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
1277static 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
1292static 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
1314typedef int (*frm_decoder)(SANMVideoContext *ctx);
1315
1316static 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
1321static 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
1361static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color)
1362{
1363 while (buf_size--)
1364 *pbuf++ = color;
1365}
1366
1367static 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
1389static 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
1518AVCodec 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};
ffmpeg Piment Noir Debian package repository