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
,