2 * LucasArts Smush video decoder
3 * Copyright (c) 2006 Cyril Zorin
4 * Copyright (c) 2011 Konstantin Shishkov
6 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/avassert.h"
24 #include "libavutil/bswap.h"
25 #include "libavutil/imgutils.h"
28 #include "bytestream.h"
29 #include "copy_block.h"
33 #define GLYPH_COORD_VECT_SIZE 16
34 #define PALETTE_SIZE 256
35 #define PALETTE_DELTA 768
37 static const int8_t glyph4_x[GLYPH_COORD_VECT_SIZE] = {
38 0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1
41 static const int8_t glyph4_y[GLYPH_COORD_VECT_SIZE] = {
42 0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2
45 static const int8_t glyph8_x[GLYPH_COORD_VECT_SIZE] = {
46 0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0
49 static const int8_t glyph8_y[GLYPH_COORD_VECT_SIZE] = {
50 0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1
53 static const int8_t motion_vectors[256][2] = {
54 { 0, 0 }, { -1, -43 }, { 6, -43 }, { -9, -42 }, { 13, -41 },
55 { -16, -40 }, { 19, -39 }, { -23, -36 }, { 26, -34 }, { -2, -33 },
56 { 4, -33 }, { -29, -32 }, { -9, -32 }, { 11, -31 }, { -16, -29 },
57 { 32, -29 }, { 18, -28 }, { -34, -26 }, { -22, -25 }, { -1, -25 },
58 { 3, -25 }, { -7, -24 }, { 8, -24 }, { 24, -23 }, { 36, -23 },
59 { -12, -22 }, { 13, -21 }, { -38, -20 }, { 0, -20 }, { -27, -19 },
60 { -4, -19 }, { 4, -19 }, { -17, -18 }, { -8, -17 }, { 8, -17 },
61 { 18, -17 }, { 28, -17 }, { 39, -17 }, { -12, -15 }, { 12, -15 },
62 { -21, -14 }, { -1, -14 }, { 1, -14 }, { -41, -13 }, { -5, -13 },
63 { 5, -13 }, { 21, -13 }, { -31, -12 }, { -15, -11 }, { -8, -11 },
64 { 8, -11 }, { 15, -11 }, { -2, -10 }, { 1, -10 }, { 31, -10 },
65 { -23, -9 }, { -11, -9 }, { -5, -9 }, { 4, -9 }, { 11, -9 },
66 { 42, -9 }, { 6, -8 }, { 24, -8 }, { -18, -7 }, { -7, -7 },
67 { -3, -7 }, { -1, -7 }, { 2, -7 }, { 18, -7 }, { -43, -6 },
68 { -13, -6 }, { -4, -6 }, { 4, -6 }, { 8, -6 }, { -33, -5 },
69 { -9, -5 }, { -2, -5 }, { 0, -5 }, { 2, -5 }, { 5, -5 },
70 { 13, -5 }, { -25, -4 }, { -6, -4 }, { -3, -4 }, { 3, -4 },
71 { 9, -4 }, { -19, -3 }, { -7, -3 }, { -4, -3 }, { -2, -3 },
72 { -1, -3 }, { 0, -3 }, { 1, -3 }, { 2, -3 }, { 4, -3 },
73 { 6, -3 }, { 33, -3 }, { -14, -2 }, { -10, -2 }, { -5, -2 },
74 { -3, -2 }, { -2, -2 }, { -1, -2 }, { 0, -2 }, { 1, -2 },
75 { 2, -2 }, { 3, -2 }, { 5, -2 }, { 7, -2 }, { 14, -2 },
76 { 19, -2 }, { 25, -2 }, { 43, -2 }, { -7, -1 }, { -3, -1 },
77 { -2, -1 }, { -1, -1 }, { 0, -1 }, { 1, -1 }, { 2, -1 },
78 { 3, -1 }, { 10, -1 }, { -5, 0 }, { -3, 0 }, { -2, 0 },
79 { -1, 0 }, { 1, 0 }, { 2, 0 }, { 3, 0 }, { 5, 0 },
80 { 7, 0 }, { -10, 1 }, { -7, 1 }, { -3, 1 }, { -2, 1 },
81 { -1, 1 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1 },
82 { -43, 2 }, { -25, 2 }, { -19, 2 }, { -14, 2 }, { -5, 2 },
83 { -3, 2 }, { -2, 2 }, { -1, 2 }, { 0, 2 }, { 1, 2 },
84 { 2, 2 }, { 3, 2 }, { 5, 2 }, { 7, 2 }, { 10, 2 },
85 { 14, 2 }, { -33, 3 }, { -6, 3 }, { -4, 3 }, { -2, 3 },
86 { -1, 3 }, { 0, 3 }, { 1, 3 }, { 2, 3 }, { 4, 3 },
87 { 19, 3 }, { -9, 4 }, { -3, 4 }, { 3, 4 }, { 7, 4 },
88 { 25, 4 }, { -13, 5 }, { -5, 5 }, { -2, 5 }, { 0, 5 },
89 { 2, 5 }, { 5, 5 }, { 9, 5 }, { 33, 5 }, { -8, 6 },
90 { -4, 6 }, { 4, 6 }, { 13, 6 }, { 43, 6 }, { -18, 7 },
91 { -2, 7 }, { 0, 7 }, { 2, 7 }, { 7, 7 }, { 18, 7 },
92 { -24, 8 }, { -6, 8 }, { -42, 9 }, { -11, 9 }, { -4, 9 },
93 { 5, 9 }, { 11, 9 }, { 23, 9 }, { -31, 10 }, { -1, 10 },
94 { 2, 10 }, { -15, 11 }, { -8, 11 }, { 8, 11 }, { 15, 11 },
95 { 31, 12 }, { -21, 13 }, { -5, 13 }, { 5, 13 }, { 41, 13 },
96 { -1, 14 }, { 1, 14 }, { 21, 14 }, { -12, 15 }, { 12, 15 },
97 { -39, 17 }, { -28, 17 }, { -18, 17 }, { -8, 17 }, { 8, 17 },
98 { 17, 18 }, { -4, 19 }, { 0, 19 }, { 4, 19 }, { 27, 19 },
99 { 38, 20 }, { -13, 21 }, { 12, 22 }, { -36, 23 }, { -24, 23 },
100 { -8, 24 }, { 7, 24 }, { -3, 25 }, { 1, 25 }, { 22, 25 },
101 { 34, 26 }, { -18, 28 }, { -32, 29 }, { 16, 29 }, { -11, 31 },
102 { 9, 32 }, { 29, 32 }, { -4, 33 }, { 2, 33 }, { -26, 34 },
103 { 23, 36 }, { -19, 39 }, { 16, 40 }, { -13, 41 }, { 9, 42 },
104 { -6, 43 }, { 1, 43 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
107 static const int8_t c37_mv[] = {
108 0, 0, 1, 0, 2, 0, 3, 0, 5, 0,
109 8, 0, 13, 0, 21, 0, -1, 0, -2, 0,
110 -3, 0, -5, 0, -8, 0, -13, 0, -17, 0,
111 -21, 0, 0, 1, 1, 1, 2, 1, 3, 1,
112 5, 1, 8, 1, 13, 1, 21, 1, -1, 1,
113 -2, 1, -3, 1, -5, 1, -8, 1, -13, 1,
114 -17, 1, -21, 1, 0, 2, 1, 2, 2, 2,
115 3, 2, 5, 2, 8, 2, 13, 2, 21, 2,
116 -1, 2, -2, 2, -3, 2, -5, 2, -8, 2,
117 -13, 2, -17, 2, -21, 2, 0, 3, 1, 3,
118 2, 3, 3, 3, 5, 3, 8, 3, 13, 3,
119 21, 3, -1, 3, -2, 3, -3, 3, -5, 3,
120 -8, 3, -13, 3, -17, 3, -21, 3, 0, 5,
121 1, 5, 2, 5, 3, 5, 5, 5, 8, 5,
122 13, 5, 21, 5, -1, 5, -2, 5, -3, 5,
123 -5, 5, -8, 5, -13, 5, -17, 5, -21, 5,
124 0, 8, 1, 8, 2, 8, 3, 8, 5, 8,
125 8, 8, 13, 8, 21, 8, -1, 8, -2, 8,
126 -3, 8, -5, 8, -8, 8, -13, 8, -17, 8,
127 -21, 8, 0, 13, 1, 13, 2, 13, 3, 13,
128 5, 13, 8, 13, 13, 13, 21, 13, -1, 13,
129 -2, 13, -3, 13, -5, 13, -8, 13, -13, 13,
130 -17, 13, -21, 13, 0, 21, 1, 21, 2, 21,
131 3, 21, 5, 21, 8, 21, 13, 21, 21, 21,
132 -1, 21, -2, 21, -3, 21, -5, 21, -8, 21,
133 -13, 21, -17, 21, -21, 21, 0, -1, 1, -1,
134 2, -1, 3, -1, 5, -1, 8, -1, 13, -1,
135 21, -1, -1, -1, -2, -1, -3, -1, -5, -1,
136 -8, -1, -13, -1, -17, -1, -21, -1, 0, -2,
137 1, -2, 2, -2, 3, -2, 5, -2, 8, -2,
138 13, -2, 21, -2, -1, -2, -2, -2, -3, -2,
139 -5, -2, -8, -2, -13, -2, -17, -2, -21, -2,
140 0, -3, 1, -3, 2, -3, 3, -3, 5, -3,
141 8, -3, 13, -3, 21, -3, -1, -3, -2, -3,
142 -3, -3, -5, -3, -8, -3, -13, -3, -17, -3,
143 -21, -3, 0, -5, 1, -5, 2, -5, 3, -5,
144 5, -5, 8, -5, 13, -5, 21, -5, -1, -5,
145 -2, -5, -3, -5, -5, -5, -8, -5, -13, -5,
146 -17, -5, -21, -5, 0, -8, 1, -8, 2, -8,
147 3, -8, 5, -8, 8, -8, 13, -8, 21, -8,
148 -1, -8, -2, -8, -3, -8, -5, -8, -8, -8,
149 -13, -8, -17, -8, -21, -8, 0, -13, 1, -13,
150 2, -13, 3, -13, 5, -13, 8, -13, 13, -13,
151 21, -13, -1, -13, -2, -13, -3, -13, -5, -13,
152 -8, -13, -13, -13, -17, -13, -21, -13, 0, -17,
153 1, -17, 2, -17, 3, -17, 5, -17, 8, -17,
154 13, -17, 21, -17, -1, -17, -2, -17, -3, -17,
155 -5, -17, -8, -17, -13, -17, -17, -17, -21, -17,
156 0, -21, 1, -21, 2, -21, 3, -21, 5, -21,
157 8, -21, 13, -21, 21, -21, -1, -21, -2, -21,
158 -3, -21, -5, -21, -8, -21, -13, -21, -17, -21,
159 0, 0, -8, -29, 8, -29, -18, -25, 17, -25,
160 0, -23, -6, -22, 6, -22, -13, -19, 12, -19,
161 0, -18, 25, -18, -25, -17, -5, -17, 5, -17,
162 -10, -15, 10, -15, 0, -14, -4, -13, 4, -13,
163 19, -13, -19, -12, -8, -11, -2, -11, 0, -11,
164 2, -11, 8, -11, -15, -10, -4, -10, 4, -10,
165 15, -10, -6, -9, -1, -9, 1, -9, 6, -9,
166 -29, -8, -11, -8, -8, -8, -3, -8, 3, -8,
167 8, -8, 11, -8, 29, -8, -5, -7, -2, -7,
168 0, -7, 2, -7, 5, -7, -22, -6, -9, -6,
169 -6, -6, -3, -6, -1, -6, 1, -6, 3, -6,
170 6, -6, 9, -6, 22, -6, -17, -5, -7, -5,
171 -4, -5, -2, -5, 0, -5, 2, -5, 4, -5,
172 7, -5, 17, -5, -13, -4, -10, -4, -5, -4,
173 -3, -4, -1, -4, 0, -4, 1, -4, 3, -4,
174 5, -4, 10, -4, 13, -4, -8, -3, -6, -3,
175 -4, -3, -3, -3, -2, -3, -1, -3, 0, -3,
176 1, -3, 2, -3, 4, -3, 6, -3, 8, -3,
177 -11, -2, -7, -2, -5, -2, -3, -2, -2, -2,
178 -1, -2, 0, -2, 1, -2, 2, -2, 3, -2,
179 5, -2, 7, -2, 11, -2, -9, -1, -6, -1,
180 -4, -1, -3, -1, -2, -1, -1, -1, 0, -1,
181 1, -1, 2, -1, 3, -1, 4, -1, 6, -1,
182 9, -1, -31, 0, -23, 0, -18, 0, -14, 0,
183 -11, 0, -7, 0, -5, 0, -4, 0, -3, 0,
184 -2, 0, -1, 0, 0, -31, 1, 0, 2, 0,
185 3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
186 14, 0, 18, 0, 23, 0, 31, 0, -9, 1,
187 -6, 1, -4, 1, -3, 1, -2, 1, -1, 1,
188 0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
189 6, 1, 9, 1, -11, 2, -7, 2, -5, 2,
190 -3, 2, -2, 2, -1, 2, 0, 2, 1, 2,
191 2, 2, 3, 2, 5, 2, 7, 2, 11, 2,
192 -8, 3, -6, 3, -4, 3, -2, 3, -1, 3,
193 0, 3, 1, 3, 2, 3, 3, 3, 4, 3,
194 6, 3, 8, 3, -13, 4, -10, 4, -5, 4,
195 -3, 4, -1, 4, 0, 4, 1, 4, 3, 4,
196 5, 4, 10, 4, 13, 4, -17, 5, -7, 5,
197 -4, 5, -2, 5, 0, 5, 2, 5, 4, 5,
198 7, 5, 17, 5, -22, 6, -9, 6, -6, 6,
199 -3, 6, -1, 6, 1, 6, 3, 6, 6, 6,
200 9, 6, 22, 6, -5, 7, -2, 7, 0, 7,
201 2, 7, 5, 7, -29, 8, -11, 8, -8, 8,
202 -3, 8, 3, 8, 8, 8, 11, 8, 29, 8,
203 -6, 9, -1, 9, 1, 9, 6, 9, -15, 10,
204 -4, 10, 4, 10, 15, 10, -8, 11, -2, 11,
205 0, 11, 2, 11, 8, 11, 19, 12, -19, 13,
206 -4, 13, 4, 13, 0, 14, -10, 15, 10, 15,
207 -5, 17, 5, 17, 25, 17, -25, 18, 0, 18,
208 -12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
209 -17, 25, 18, 25, -8, 29, 8, 29, 0, 31,
210 0, 0, -6, -22, 6, -22, -13, -19, 12, -19,
211 0, -18, -5, -17, 5, -17, -10, -15, 10, -15,
212 0, -14, -4, -13, 4, -13, 19, -13, -19, -12,
213 -8, -11, -2, -11, 0, -11, 2, -11, 8, -11,
214 -15, -10, -4, -10, 4, -10, 15, -10, -6, -9,
215 -1, -9, 1, -9, 6, -9, -11, -8, -8, -8,
216 -3, -8, 0, -8, 3, -8, 8, -8, 11, -8,
217 -5, -7, -2, -7, 0, -7, 2, -7, 5, -7,
218 -22, -6, -9, -6, -6, -6, -3, -6, -1, -6,
219 1, -6, 3, -6, 6, -6, 9, -6, 22, -6,
220 -17, -5, -7, -5, -4, -5, -2, -5, -1, -5,
221 0, -5, 1, -5, 2, -5, 4, -5, 7, -5,
222 17, -5, -13, -4, -10, -4, -5, -4, -3, -4,
223 -2, -4, -1, -4, 0, -4, 1, -4, 2, -4,
224 3, -4, 5, -4, 10, -4, 13, -4, -8, -3,
225 -6, -3, -4, -3, -3, -3, -2, -3, -1, -3,
226 0, -3, 1, -3, 2, -3, 3, -3, 4, -3,
227 6, -3, 8, -3, -11, -2, -7, -2, -5, -2,
228 -4, -2, -3, -2, -2, -2, -1, -2, 0, -2,
229 1, -2, 2, -2, 3, -2, 4, -2, 5, -2,
230 7, -2, 11, -2, -9, -1, -6, -1, -5, -1,
231 -4, -1, -3, -1, -2, -1, -1, -1, 0, -1,
232 1, -1, 2, -1, 3, -1, 4, -1, 5, -1,
233 6, -1, 9, -1, -23, 0, -18, 0, -14, 0,
234 -11, 0, -7, 0, -5, 0, -4, 0, -3, 0,
235 -2, 0, -1, 0, 0, -23, 1, 0, 2, 0,
236 3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
237 14, 0, 18, 0, 23, 0, -9, 1, -6, 1,
238 -5, 1, -4, 1, -3, 1, -2, 1, -1, 1,
239 0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
240 5, 1, 6, 1, 9, 1, -11, 2, -7, 2,
241 -5, 2, -4, 2, -3, 2, -2, 2, -1, 2,
242 0, 2, 1, 2, 2, 2, 3, 2, 4, 2,
243 5, 2, 7, 2, 11, 2, -8, 3, -6, 3,
244 -4, 3, -3, 3, -2, 3, -1, 3, 0, 3,
245 1, 3, 2, 3, 3, 3, 4, 3, 6, 3,
246 8, 3, -13, 4, -10, 4, -5, 4, -3, 4,
247 -2, 4, -1, 4, 0, 4, 1, 4, 2, 4,
248 3, 4, 5, 4, 10, 4, 13, 4, -17, 5,
249 -7, 5, -4, 5, -2, 5, -1, 5, 0, 5,
250 1, 5, 2, 5, 4, 5, 7, 5, 17, 5,
251 -22, 6, -9, 6, -6, 6, -3, 6, -1, 6,
252 1, 6, 3, 6, 6, 6, 9, 6, 22, 6,
253 -5, 7, -2, 7, 0, 7, 2, 7, 5, 7,
254 -11, 8, -8, 8, -3, 8, 0, 8, 3, 8,
255 8, 8, 11, 8, -6, 9, -1, 9, 1, 9,
256 6, 9, -15, 10, -4, 10, 4, 10, 15, 10,
257 -8, 11, -2, 11, 0, 11, 2, 11, 8, 11,
258 19, 12, -19, 13, -4, 13, 4, 13, 0, 14,
259 -10, 15, 10, 15, -5, 17, 5, 17, 0, 18,
260 -12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
263 typedef struct SANMVideoContext {
264 AVCodecContext *avctx;
267 int version, subversion;
268 uint32_t pal[PALETTE_SIZE];
269 int16_t delta_pal[PALETTE_DELTA];
273 int aligned_width, aligned_height;
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;
283 unsigned int rle_buf_size;
287 long npixels, buf_size;
289 uint16_t codebook[256];
290 uint16_t small_codebook[4];
292 int8_t p4x4glyphs[NGLYPHS][16];
293 int8_t p8x8glyphs[NGLYPHS][64];
296 typedef struct SANMFrameHeader {
297 int seq_num, codec, rotate_code, rle_output_size;
300 uint32_t width, height;
320 * Return enum GlyphEdge of box where point (x, y) lies.
322 * @param x x point coordinate
323 * @param y y point coordinate
324 * @param edge_size box width/height.
326 static enum GlyphEdge which_edge(int x, int y, int edge_size)
328 const int edge_max = edge_size - 1;
332 else if (y == edge_max)
336 else if (x == edge_max)
342 static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1)
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))
349 else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) ||
350 (edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE))
352 else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) ||
353 (edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE))
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))
364 /* Interpolate two points. */
365 static void interp_point(int8_t *points, int x0, int y0, int x1, int y1,
366 int pos, int npoints)
369 points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints;
370 points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints;
378 * Construct glyphs by iterating through vector coordinates.
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.
385 static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec,
386 const int side_length)
388 const int glyph_size = side_length * side_length;
389 int8_t *pglyph = pglyphs;
392 for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) {
395 enum GlyphEdge edge0 = which_edge(x0, y0, side_length);
397 for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) {
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));
405 for (ipoint = 0; ipoint <= npoints; ipoint++) {
409 interp_point(point, x0, y0, x1, y1, ipoint, npoints);
413 for (irow = point[1]; irow >= 0; irow--)
414 pglyph[point[0] + irow * side_length] = 1;
418 for (irow = point[1]; irow < side_length; irow++)
419 pglyph[point[0] + irow * side_length] = 1;
423 for (icol = point[0]; icol >= 0; icol--)
424 pglyph[icol + point[1] * side_length] = 1;
428 for (icol = point[0]; icol < side_length; icol++)
429 pglyph[icol + point[1] * side_length] = 1;
437 static void init_sizes(SANMVideoContext *ctx, int width, int height)
440 ctx->height = height;
441 ctx->npixels = width * height;
443 ctx->aligned_width = FFALIGN(width, 8);
444 ctx->aligned_height = FFALIGN(height, 8);
446 ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]);
450 static void destroy_buffers(SANMVideoContext *ctx)
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);
462 static av_cold int init_buffers(SANMVideoContext *ctx)
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);
468 av_fast_padded_malloc(&ctx->stored_frame,
469 &ctx->stored_frame_size, ctx->buf_size);
471 if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 ||
472 (!ctx->stored_frame && !ctx->version)) {
473 destroy_buffers(ctx);
474 return AVERROR(ENOMEM);
480 static void rotate_bufs(SANMVideoContext *ctx, int rotate_code)
482 if (rotate_code == 2)
483 FFSWAP(uint16_t*, ctx->frm1, ctx->frm2);
484 FFSWAP(uint16_t*, ctx->frm2, ctx->frm0);
487 static av_cold int decode_init(AVCodecContext *avctx)
489 SANMVideoContext *ctx = avctx->priv_data;
492 ctx->version = !avctx->extradata_size;
494 avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8;
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);
502 make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4);
503 make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8);
508 if (avctx->extradata_size < 1026) {
509 av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n");
510 return AVERROR_INVALIDDATA;
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);
521 static av_cold int decode_end(AVCodecContext *avctx)
523 SANMVideoContext *ctx = avctx->priv_data;
525 destroy_buffers(ctx);
530 static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size)
532 int opcode, color, run_len, left = out_size;
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;
541 color = bytestream2_get_byte(&ctx->gb);
542 memset(dst, color, run_len);
544 if (bytestream2_get_bytes_left(&ctx->gb) < run_len)
545 return AVERROR_INVALIDDATA;
546 bytestream2_get_bufferu(&ctx->gb, dst, run_len);
556 static int old_codec1(SANMVideoContext *ctx, int top,
557 int left, int width, int height)
559 uint8_t *dst = ((uint8_t *)ctx->frm0) + left + top * ctx->pitch;
560 int i, j, len, flag, code, val, pos, end;
562 for (i = 0; i < height; i++) {
565 if (bytestream2_get_bytes_left(&ctx->gb) < 2)
566 return AVERROR_INVALIDDATA;
568 len = bytestream2_get_le16u(&ctx->gb);
569 end = bytestream2_tell(&ctx->gb) + len;
571 while (bytestream2_tell(&ctx->gb) < end) {
572 if (bytestream2_get_bytes_left(&ctx->gb) < 2)
573 return AVERROR_INVALIDDATA;
575 code = bytestream2_get_byteu(&ctx->gb);
577 code = (code >> 1) + 1;
578 if (pos + code > width)
579 return AVERROR_INVALIDDATA;
581 val = bytestream2_get_byteu(&ctx->gb);
583 memset(dst + pos, val, code);
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);
598 ctx->rotate_code = 0;
603 static inline void codec37_mv(uint8_t *dst, const uint8_t *src,
604 int height, int stride, int x, int y)
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)
622 static int old_codec37(SANMVideoContext *ctx, int top,
623 int left, int width, int height)
625 int stride = ctx->pitch;
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);
635 bytestream2_skip(&ctx->gb, 4);
636 flags = bytestream2_get_byte(&ctx->gb);
637 bytestream2_skip(&ctx->gb, 3);
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");
644 ctx->rotate_code = 0;
646 if (((seq & 1) || !(flags & 1)) && (compr && compr != 2))
649 dst = ((uint8_t*)ctx->frm0) + left + top * stride;
650 prev = ((uint8_t*)ctx->frm2) + left + top * stride;
653 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvoff);
654 return AVERROR_INVALIDDATA;
659 for (i = 0; i < height; i++) {
660 bytestream2_get_buffer(&ctx->gb, dst, width);
663 memset(ctx->frm1, 0, ctx->height * stride);
664 memset(ctx->frm2, 0, ctx->height * stride);
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);
675 for (j = 0; j < height; j += 4) {
676 for (i = 0; i < width; i += 4) {
680 copy_block4(dst + i, prev + i, stride, stride, 4);
683 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
684 return AVERROR_INVALIDDATA;
685 code = bytestream2_get_byteu(&ctx->gb);
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);
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);
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);
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;
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);
726 for (j = 0; j < height; j += 4) {
727 for (i = 0; i < width; i += 4) {
731 copy_block4(dst + i, prev + i, stride, stride, 4);
734 code = bytestream2_get_byte(&ctx->gb);
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;
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);
760 avpriv_report_missing_feature(ctx->avctx,
761 "Subcodec 37 compression %d", compr);
762 return AVERROR_PATCHWELCOME;
768 static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1,
769 uint8_t *prev2, int stride, int tbl, int size)
775 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
776 return AVERROR_INVALIDDATA;
778 code = bytestream2_get_byteu(&ctx->gb);
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);
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,
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,
803 return AVERROR_INVALIDDATA;
807 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
808 return AVERROR_INVALIDDATA;
810 t = bytestream2_get_byteu(&ctx->gb);
811 for (k = 0; k < size; k++)
812 memset(dst + k * stride, t, size);
815 if (bytestream2_get_bytes_left(&ctx->gb) < 3)
816 return AVERROR_INVALIDDATA;
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);
822 for (k = 0; k < size; k++)
823 for (t = 0; t < size; t++)
824 dst[t + k * stride] = colors[!*pglyph++];
827 for (k = 0; k < size; k++)
828 memcpy(dst + k * stride, prev1 + k * stride, size);
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);
839 int mx = motion_vectors[code][0];
840 int my = motion_vectors[code][1];
841 int index = prev2 - (const uint8_t *)ctx->frm2;
843 av_assert2(index >= 0 && index < (ctx->buf_size >> 1));
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;
851 for (k = 0; k < size; k++)
852 memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size);
858 static int old_codec47(SANMVideoContext *ctx, int top,
859 int left, int width, int height)
861 uint32_t decoded_size;
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);
873 bytestream2_skip(&ctx->gb, 9);
874 decoded_size = bytestream2_get_le32(&ctx->gb);
875 bytestream2_skip(&ctx->gb, 8);
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");
883 bytestream2_skip(&ctx->gb, 0x8080);
886 memset(prev1, 0, ctx->height * stride);
887 memset(prev2, 0, ctx->height * stride);
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);
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) {
907 dst[stride + i + 1] = bytestream2_get_byteu(&ctx->gb);
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,
918 return AVERROR_INVALIDDATA;
926 memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height);
929 memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height);
932 if (rle_decode(ctx, dst, decoded_size))
933 return AVERROR_INVALIDDATA;
936 avpriv_report_missing_feature(ctx->avctx,
937 "Subcodec 47 compression %d", compr);
938 return AVERROR_PATCHWELCOME;
940 if (seq == ctx->prev_seq + 1)
941 ctx->rotate_code = new_rot;
943 ctx->rotate_code = 0;
949 static int process_frame_obj(SANMVideoContext *ctx)
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);
958 av_log(ctx->avctx, AV_LOG_ERROR, "Dimensions are invalid.\n");
959 return AVERROR_INVALIDDATA;
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));
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);
974 bytestream2_skip(&ctx->gb, 4);
979 return old_codec1(ctx, top, left, w, h);
982 return old_codec37(ctx, top, left, w, h);
985 return old_codec47(ctx, top, left, w, h);
988 avpriv_request_sample(ctx->avctx, "Subcodec %d", codec);
989 return AVERROR_PATCHWELCOME;
993 static int decode_0(SANMVideoContext *ctx)
995 uint16_t *frm = ctx->frm0;
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;
1002 for (y = 0; y < ctx->height; y++) {
1003 for (x = 0; x < ctx->width; x++)
1004 frm[x] = bytestream2_get_le16u(&ctx->gb);
1010 static int decode_nop(SANMVideoContext *ctx)
1012 avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type");
1013 return AVERROR_PATCHWELCOME;
1016 static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, int pitch)
1018 uint8_t *dst = (uint8_t *)pdest;
1019 uint8_t *src = (uint8_t *)psrc;
1020 int stride = pitch * 2;
1022 switch (block_size) {
1024 copy_block4(dst, src, stride, stride, 2);
1027 copy_block8(dst, src, stride, stride, 4);
1030 copy_block16(dst, src, stride, stride, 8);
1035 static void fill_block(uint16_t *pdest, uint16_t color, int block_size, int pitch)
1039 pitch -= block_size;
1040 for (y = 0; y < block_size; y++, pdest += pitch)
1041 for (x = 0; x < block_size; x++)
1045 static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index,
1046 uint16_t fg_color, uint16_t bg_color, int block_size,
1050 uint16_t colors[2] = { fg_color, bg_color };
1053 if (index >= NGLYPHS) {
1054 av_log(ctx->avctx, AV_LOG_ERROR, "Ignoring nonexistent glyph #%u.\n", index);
1055 return AVERROR_INVALIDDATA;
1058 pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index];
1059 pitch -= block_size;
1061 for (y = 0; y < block_size; y++, dst += pitch)
1062 for (x = 0; x < block_size; x++)
1063 *dst++ = colors[*pglyph++];
1067 static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
1069 uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
1071 if (block_size == 2) {
1074 if (bytestream2_get_bytes_left(&ctx->gb) < 4)
1075 return AVERROR_INVALIDDATA;
1077 indices = bytestream2_get_le32u(&ctx->gb);
1078 dst[0] = ctx->codebook[indices & 0xFF];
1080 dst[1] = ctx->codebook[indices & 0xFF];
1082 dst[pitch] = ctx->codebook[indices & 0xFF];
1084 dst[pitch + 1] = ctx->codebook[indices & 0xFF];
1086 uint16_t fgcolor, bgcolor;
1089 if (bytestream2_get_bytes_left(&ctx->gb) < 3)
1090 return AVERROR_INVALIDDATA;
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)];
1096 draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
1101 static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
1103 uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
1105 if (block_size == 2) {
1106 if (bytestream2_get_bytes_left(&ctx->gb) < 8)
1107 return AVERROR_INVALIDDATA;
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);
1114 uint16_t fgcolor, bgcolor;
1117 if (bytestream2_get_bytes_left(&ctx->gb) < 5)
1118 return AVERROR_INVALIDDATA;
1120 glyph = bytestream2_get_byteu(&ctx->gb);
1121 bgcolor = bytestream2_get_le16u(&ctx->gb);
1122 fgcolor = bytestream2_get_le16u(&ctx->gb);
1124 draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
1129 static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my,
1132 int start_pos = cx + mx + (cy + my) * ctx->pitch;
1133 int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1);
1135 int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1);
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);
1145 static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size)
1147 int16_t mx, my, index;
1150 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1151 return AVERROR_INVALIDDATA;
1153 opcode = bytestream2_get_byteu(&ctx->gb);
1157 mx = motion_vectors[opcode][0];
1158 my = motion_vectors[opcode][1];
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);
1167 if (bytestream2_get_bytes_left(&ctx->gb) < 2)
1168 return AVERROR_INVALIDDATA;
1169 index = bytestream2_get_le16u(&ctx->gb);
1171 mx = index % ctx->width;
1172 my = index / ctx->width;
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);
1181 copy_block(ctx->frm0 + cx + ctx->pitch * cy,
1182 ctx->frm1 + cx + ctx->pitch * cy,
1183 blk_size, ctx->pitch);
1186 opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch);
1190 opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
1196 fill_block(ctx->frm0 + cx + cy * ctx->pitch,
1197 ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch);
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);
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);
1212 if (blk_size == 2) {
1213 opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
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;
1230 static int decode_2(SANMVideoContext *ctx)
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))
1242 static int decode_3(SANMVideoContext *ctx)
1244 memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size);
1248 static int decode_4(SANMVideoContext *ctx)
1250 memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size);
1254 static int decode_5(SANMVideoContext *ctx)
1260 uint8_t *dst = (uint8_t*)ctx->frm0;
1262 if (rle_decode(ctx, dst, ctx->buf_size))
1263 return AVERROR_INVALIDDATA;
1266 npixels = ctx->npixels;
1269 *frm = av_bswap16(*frm);
1277 static int decode_6(SANMVideoContext *ctx)
1279 int npixels = ctx->npixels;
1280 uint16_t *frm = ctx->frm0;
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;
1287 *frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1292 static int decode_8(SANMVideoContext *ctx)
1294 uint16_t *pdest = ctx->frm0;
1296 long npixels = ctx->npixels;
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);
1303 rsrc = ctx->rle_buf;
1305 if (rle_decode(ctx, rsrc, npixels))
1306 return AVERROR_INVALIDDATA;
1309 *pdest++ = ctx->codebook[*rsrc++];
1314 typedef int (*frm_decoder)(SANMVideoContext *ctx);
1316 static const frm_decoder v1_decoders[] = {
1317 decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5,
1318 decode_6, decode_nop, decode_8
1321 static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr)
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",
1328 return AVERROR_INVALIDDATA;
1330 bytestream2_skip(&ctx->gb, 8); // skip pad
1332 hdr->width = bytestream2_get_le32u(&ctx->gb);
1333 hdr->height = bytestream2_get_le32u(&ctx->gb);
1335 if (hdr->width != ctx->width || hdr->height != ctx->height) {
1336 avpriv_report_missing_feature(ctx->avctx, "Variable size frames");
1337 return AVERROR_PATCHWELCOME;
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);
1344 bytestream2_skip(&ctx->gb, 4); // skip pad
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);
1350 bytestream2_skip(&ctx->gb, 2); // skip pad
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);
1356 bytestream2_skip(&ctx->gb, 8); // skip pad
1361 static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color)
1367 static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr)
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);
1374 if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0)
1377 dst = ctx->frame->data[0];
1378 dstpitch = ctx->frame->linesize[0];
1381 memcpy(dst, src, srcpitch);
1389 static int decode_frame(AVCodecContext *avctx, void *data,
1390 int *got_frame_ptr, AVPacket *pkt)
1392 SANMVideoContext *ctx = avctx->priv_data;
1396 bytestream2_init(&ctx->gb, pkt->data, pkt->size);
1398 if (!ctx->version) {
1401 while (bytestream2_get_bytes_left(&ctx->gb) >= 8) {
1405 sig = bytestream2_get_be32u(&ctx->gb);
1406 size = bytestream2_get_be32u(&ctx->gb);
1407 pos = bytestream2_tell(&ctx->gb);
1409 if (bytestream2_get_bytes_left(&ctx->gb) < size) {
1410 av_log(avctx, AV_LOG_ERROR, "Incorrect chunk size %"PRIu32".\n", size);
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;
1420 for (i = 0; i < PALETTE_SIZE; i++)
1421 ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
1423 case MKBETAG('F', 'O', 'B', 'J'):
1425 return AVERROR_INVALIDDATA;
1426 if (ret = process_frame_obj(ctx))
1429 case MKBETAG('X', 'P', 'A', 'L'):
1430 if (size == 6 || size == 4) {
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);
1439 ctx->pal[i] = 0xFFU << 24 | AV_RB24(tmp);
1442 if (size < PALETTE_DELTA * 2 + 4) {
1443 av_log(avctx, AV_LOG_ERROR,
1444 "Incorrect palette change block size %"PRIu32".\n",
1446 return AVERROR_INVALIDDATA;
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);
1455 memset(ctx->pal, 0, sizeof(ctx->pal));
1459 case MKBETAG('S', 'T', 'O', 'R'):
1462 case MKBETAG('F', 'T', 'C', 'H'):
1463 memcpy(ctx->frm0, ctx->stored_frame, ctx->buf_size);
1466 bytestream2_skip(&ctx->gb, size);
1467 av_log(avctx, AV_LOG_DEBUG,
1468 "Unknown/unsupported chunk %"PRIx32".\n", sig);
1472 bytestream2_seek(&ctx->gb, pos + size, SEEK_SET);
1474 bytestream2_skip(&ctx->gb, 1);
1477 memcpy(ctx->stored_frame, ctx->frm0, ctx->buf_size);
1478 if ((ret = copy_output(ctx, NULL)))
1480 memcpy(ctx->frame->data[1], ctx->pal, 1024);
1482 SANMFrameHeader header;
1484 if ((ret = read_frame_header(ctx, &header)))
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);
1493 ctx->frame->pict_type = AV_PICTURE_TYPE_P;
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);
1503 avpriv_request_sample(avctx, "Subcodec %d", header.codec);
1504 return AVERROR_PATCHWELCOME;
1507 if ((ret = copy_output(ctx, &header)))
1510 if (ctx->rotate_code)
1511 rotate_bufs(ctx, ctx->rotate_code);
1518 AVCodec ff_sanm_decoder = {
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,