FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
sanm.c
Go to the documentation of this file.
1 /*
2  * LucasArts Smush video decoder
3  * Copyright (c) 2006 Cyril Zorin
4  * Copyright (c) 2011 Konstantin Shishkov
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/avassert.h"
24 #include "libavutil/bswap.h"
25 #include "libavutil/imgutils.h"
26 
27 #include "avcodec.h"
28 #include "bytestream.h"
29 #include "copy_block.h"
30 #include "internal.h"
31 
32 #define NGLYPHS 256
33 #define GLYPH_COORD_VECT_SIZE 16
34 #define PALETTE_SIZE 256
35 #define PALETTE_DELTA 768
36 
37 static const int8_t glyph4_x[GLYPH_COORD_VECT_SIZE] = {
38  0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1
39 };
40 
41 static const int8_t glyph4_y[GLYPH_COORD_VECT_SIZE] = {
42  0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2
43 };
44 
45 static const int8_t glyph8_x[GLYPH_COORD_VECT_SIZE] = {
46  0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0
47 };
48 
49 static const int8_t glyph8_y[GLYPH_COORD_VECT_SIZE] = {
50  0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1
51 };
52 
53 static const int8_t motion_vectors[256][2] = {
54  { 0, 0 }, { -1, -43 }, { 6, -43 }, { -9, -42 }, { 13, -41 },
55  { -16, -40 }, { 19, -39 }, { -23, -36 }, { 26, -34 }, { -2, -33 },
56  { 4, -33 }, { -29, -32 }, { -9, -32 }, { 11, -31 }, { -16, -29 },
57  { 32, -29 }, { 18, -28 }, { -34, -26 }, { -22, -25 }, { -1, -25 },
58  { 3, -25 }, { -7, -24 }, { 8, -24 }, { 24, -23 }, { 36, -23 },
59  { -12, -22 }, { 13, -21 }, { -38, -20 }, { 0, -20 }, { -27, -19 },
60  { -4, -19 }, { 4, -19 }, { -17, -18 }, { -8, -17 }, { 8, -17 },
61  { 18, -17 }, { 28, -17 }, { 39, -17 }, { -12, -15 }, { 12, -15 },
62  { -21, -14 }, { -1, -14 }, { 1, -14 }, { -41, -13 }, { -5, -13 },
63  { 5, -13 }, { 21, -13 }, { -31, -12 }, { -15, -11 }, { -8, -11 },
64  { 8, -11 }, { 15, -11 }, { -2, -10 }, { 1, -10 }, { 31, -10 },
65  { -23, -9 }, { -11, -9 }, { -5, -9 }, { 4, -9 }, { 11, -9 },
66  { 42, -9 }, { 6, -8 }, { 24, -8 }, { -18, -7 }, { -7, -7 },
67  { -3, -7 }, { -1, -7 }, { 2, -7 }, { 18, -7 }, { -43, -6 },
68  { -13, -6 }, { -4, -6 }, { 4, -6 }, { 8, -6 }, { -33, -5 },
69  { -9, -5 }, { -2, -5 }, { 0, -5 }, { 2, -5 }, { 5, -5 },
70  { 13, -5 }, { -25, -4 }, { -6, -4 }, { -3, -4 }, { 3, -4 },
71  { 9, -4 }, { -19, -3 }, { -7, -3 }, { -4, -3 }, { -2, -3 },
72  { -1, -3 }, { 0, -3 }, { 1, -3 }, { 2, -3 }, { 4, -3 },
73  { 6, -3 }, { 33, -3 }, { -14, -2 }, { -10, -2 }, { -5, -2 },
74  { -3, -2 }, { -2, -2 }, { -1, -2 }, { 0, -2 }, { 1, -2 },
75  { 2, -2 }, { 3, -2 }, { 5, -2 }, { 7, -2 }, { 14, -2 },
76  { 19, -2 }, { 25, -2 }, { 43, -2 }, { -7, -1 }, { -3, -1 },
77  { -2, -1 }, { -1, -1 }, { 0, -1 }, { 1, -1 }, { 2, -1 },
78  { 3, -1 }, { 10, -1 }, { -5, 0 }, { -3, 0 }, { -2, 0 },
79  { -1, 0 }, { 1, 0 }, { 2, 0 }, { 3, 0 }, { 5, 0 },
80  { 7, 0 }, { -10, 1 }, { -7, 1 }, { -3, 1 }, { -2, 1 },
81  { -1, 1 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1 },
82  { -43, 2 }, { -25, 2 }, { -19, 2 }, { -14, 2 }, { -5, 2 },
83  { -3, 2 }, { -2, 2 }, { -1, 2 }, { 0, 2 }, { 1, 2 },
84  { 2, 2 }, { 3, 2 }, { 5, 2 }, { 7, 2 }, { 10, 2 },
85  { 14, 2 }, { -33, 3 }, { -6, 3 }, { -4, 3 }, { -2, 3 },
86  { -1, 3 }, { 0, 3 }, { 1, 3 }, { 2, 3 }, { 4, 3 },
87  { 19, 3 }, { -9, 4 }, { -3, 4 }, { 3, 4 }, { 7, 4 },
88  { 25, 4 }, { -13, 5 }, { -5, 5 }, { -2, 5 }, { 0, 5 },
89  { 2, 5 }, { 5, 5 }, { 9, 5 }, { 33, 5 }, { -8, 6 },
90  { -4, 6 }, { 4, 6 }, { 13, 6 }, { 43, 6 }, { -18, 7 },
91  { -2, 7 }, { 0, 7 }, { 2, 7 }, { 7, 7 }, { 18, 7 },
92  { -24, 8 }, { -6, 8 }, { -42, 9 }, { -11, 9 }, { -4, 9 },
93  { 5, 9 }, { 11, 9 }, { 23, 9 }, { -31, 10 }, { -1, 10 },
94  { 2, 10 }, { -15, 11 }, { -8, 11 }, { 8, 11 }, { 15, 11 },
95  { 31, 12 }, { -21, 13 }, { -5, 13 }, { 5, 13 }, { 41, 13 },
96  { -1, 14 }, { 1, 14 }, { 21, 14 }, { -12, 15 }, { 12, 15 },
97  { -39, 17 }, { -28, 17 }, { -18, 17 }, { -8, 17 }, { 8, 17 },
98  { 17, 18 }, { -4, 19 }, { 0, 19 }, { 4, 19 }, { 27, 19 },
99  { 38, 20 }, { -13, 21 }, { 12, 22 }, { -36, 23 }, { -24, 23 },
100  { -8, 24 }, { 7, 24 }, { -3, 25 }, { 1, 25 }, { 22, 25 },
101  { 34, 26 }, { -18, 28 }, { -32, 29 }, { 16, 29 }, { -11, 31 },
102  { 9, 32 }, { 29, 32 }, { -4, 33 }, { 2, 33 }, { -26, 34 },
103  { 23, 36 }, { -19, 39 }, { 16, 40 }, { -13, 41 }, { 9, 42 },
104  { -6, 43 }, { 1, 43 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
105 };
106 
107 static const int8_t c37_mv[] = {
108  0, 0, 1, 0, 2, 0, 3, 0, 5, 0,
109  8, 0, 13, 0, 21, 0, -1, 0, -2, 0,
110  -3, 0, -5, 0, -8, 0, -13, 0, -17, 0,
111  -21, 0, 0, 1, 1, 1, 2, 1, 3, 1,
112  5, 1, 8, 1, 13, 1, 21, 1, -1, 1,
113  -2, 1, -3, 1, -5, 1, -8, 1, -13, 1,
114  -17, 1, -21, 1, 0, 2, 1, 2, 2, 2,
115  3, 2, 5, 2, 8, 2, 13, 2, 21, 2,
116  -1, 2, -2, 2, -3, 2, -5, 2, -8, 2,
117  -13, 2, -17, 2, -21, 2, 0, 3, 1, 3,
118  2, 3, 3, 3, 5, 3, 8, 3, 13, 3,
119  21, 3, -1, 3, -2, 3, -3, 3, -5, 3,
120  -8, 3, -13, 3, -17, 3, -21, 3, 0, 5,
121  1, 5, 2, 5, 3, 5, 5, 5, 8, 5,
122  13, 5, 21, 5, -1, 5, -2, 5, -3, 5,
123  -5, 5, -8, 5, -13, 5, -17, 5, -21, 5,
124  0, 8, 1, 8, 2, 8, 3, 8, 5, 8,
125  8, 8, 13, 8, 21, 8, -1, 8, -2, 8,
126  -3, 8, -5, 8, -8, 8, -13, 8, -17, 8,
127  -21, 8, 0, 13, 1, 13, 2, 13, 3, 13,
128  5, 13, 8, 13, 13, 13, 21, 13, -1, 13,
129  -2, 13, -3, 13, -5, 13, -8, 13, -13, 13,
130  -17, 13, -21, 13, 0, 21, 1, 21, 2, 21,
131  3, 21, 5, 21, 8, 21, 13, 21, 21, 21,
132  -1, 21, -2, 21, -3, 21, -5, 21, -8, 21,
133  -13, 21, -17, 21, -21, 21, 0, -1, 1, -1,
134  2, -1, 3, -1, 5, -1, 8, -1, 13, -1,
135  21, -1, -1, -1, -2, -1, -3, -1, -5, -1,
136  -8, -1, -13, -1, -17, -1, -21, -1, 0, -2,
137  1, -2, 2, -2, 3, -2, 5, -2, 8, -2,
138  13, -2, 21, -2, -1, -2, -2, -2, -3, -2,
139  -5, -2, -8, -2, -13, -2, -17, -2, -21, -2,
140  0, -3, 1, -3, 2, -3, 3, -3, 5, -3,
141  8, -3, 13, -3, 21, -3, -1, -3, -2, -3,
142  -3, -3, -5, -3, -8, -3, -13, -3, -17, -3,
143  -21, -3, 0, -5, 1, -5, 2, -5, 3, -5,
144  5, -5, 8, -5, 13, -5, 21, -5, -1, -5,
145  -2, -5, -3, -5, -5, -5, -8, -5, -13, -5,
146  -17, -5, -21, -5, 0, -8, 1, -8, 2, -8,
147  3, -8, 5, -8, 8, -8, 13, -8, 21, -8,
148  -1, -8, -2, -8, -3, -8, -5, -8, -8, -8,
149  -13, -8, -17, -8, -21, -8, 0, -13, 1, -13,
150  2, -13, 3, -13, 5, -13, 8, -13, 13, -13,
151  21, -13, -1, -13, -2, -13, -3, -13, -5, -13,
152  -8, -13, -13, -13, -17, -13, -21, -13, 0, -17,
153  1, -17, 2, -17, 3, -17, 5, -17, 8, -17,
154  13, -17, 21, -17, -1, -17, -2, -17, -3, -17,
155  -5, -17, -8, -17, -13, -17, -17, -17, -21, -17,
156  0, -21, 1, -21, 2, -21, 3, -21, 5, -21,
157  8, -21, 13, -21, 21, -21, -1, -21, -2, -21,
158  -3, -21, -5, -21, -8, -21, -13, -21, -17, -21,
159  0, 0, -8, -29, 8, -29, -18, -25, 17, -25,
160  0, -23, -6, -22, 6, -22, -13, -19, 12, -19,
161  0, -18, 25, -18, -25, -17, -5, -17, 5, -17,
162  -10, -15, 10, -15, 0, -14, -4, -13, 4, -13,
163  19, -13, -19, -12, -8, -11, -2, -11, 0, -11,
164  2, -11, 8, -11, -15, -10, -4, -10, 4, -10,
165  15, -10, -6, -9, -1, -9, 1, -9, 6, -9,
166  -29, -8, -11, -8, -8, -8, -3, -8, 3, -8,
167  8, -8, 11, -8, 29, -8, -5, -7, -2, -7,
168  0, -7, 2, -7, 5, -7, -22, -6, -9, -6,
169  -6, -6, -3, -6, -1, -6, 1, -6, 3, -6,
170  6, -6, 9, -6, 22, -6, -17, -5, -7, -5,
171  -4, -5, -2, -5, 0, -5, 2, -5, 4, -5,
172  7, -5, 17, -5, -13, -4, -10, -4, -5, -4,
173  -3, -4, -1, -4, 0, -4, 1, -4, 3, -4,
174  5, -4, 10, -4, 13, -4, -8, -3, -6, -3,
175  -4, -3, -3, -3, -2, -3, -1, -3, 0, -3,
176  1, -3, 2, -3, 4, -3, 6, -3, 8, -3,
177  -11, -2, -7, -2, -5, -2, -3, -2, -2, -2,
178  -1, -2, 0, -2, 1, -2, 2, -2, 3, -2,
179  5, -2, 7, -2, 11, -2, -9, -1, -6, -1,
180  -4, -1, -3, -1, -2, -1, -1, -1, 0, -1,
181  1, -1, 2, -1, 3, -1, 4, -1, 6, -1,
182  9, -1, -31, 0, -23, 0, -18, 0, -14, 0,
183  -11, 0, -7, 0, -5, 0, -4, 0, -3, 0,
184  -2, 0, -1, 0, 0, -31, 1, 0, 2, 0,
185  3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
186  14, 0, 18, 0, 23, 0, 31, 0, -9, 1,
187  -6, 1, -4, 1, -3, 1, -2, 1, -1, 1,
188  0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
189  6, 1, 9, 1, -11, 2, -7, 2, -5, 2,
190  -3, 2, -2, 2, -1, 2, 0, 2, 1, 2,
191  2, 2, 3, 2, 5, 2, 7, 2, 11, 2,
192  -8, 3, -6, 3, -4, 3, -2, 3, -1, 3,
193  0, 3, 1, 3, 2, 3, 3, 3, 4, 3,
194  6, 3, 8, 3, -13, 4, -10, 4, -5, 4,
195  -3, 4, -1, 4, 0, 4, 1, 4, 3, 4,
196  5, 4, 10, 4, 13, 4, -17, 5, -7, 5,
197  -4, 5, -2, 5, 0, 5, 2, 5, 4, 5,
198  7, 5, 17, 5, -22, 6, -9, 6, -6, 6,
199  -3, 6, -1, 6, 1, 6, 3, 6, 6, 6,
200  9, 6, 22, 6, -5, 7, -2, 7, 0, 7,
201  2, 7, 5, 7, -29, 8, -11, 8, -8, 8,
202  -3, 8, 3, 8, 8, 8, 11, 8, 29, 8,
203  -6, 9, -1, 9, 1, 9, 6, 9, -15, 10,
204  -4, 10, 4, 10, 15, 10, -8, 11, -2, 11,
205  0, 11, 2, 11, 8, 11, 19, 12, -19, 13,
206  -4, 13, 4, 13, 0, 14, -10, 15, 10, 15,
207  -5, 17, 5, 17, 25, 17, -25, 18, 0, 18,
208  -12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
209  -17, 25, 18, 25, -8, 29, 8, 29, 0, 31,
210  0, 0, -6, -22, 6, -22, -13, -19, 12, -19,
211  0, -18, -5, -17, 5, -17, -10, -15, 10, -15,
212  0, -14, -4, -13, 4, -13, 19, -13, -19, -12,
213  -8, -11, -2, -11, 0, -11, 2, -11, 8, -11,
214  -15, -10, -4, -10, 4, -10, 15, -10, -6, -9,
215  -1, -9, 1, -9, 6, -9, -11, -8, -8, -8,
216  -3, -8, 0, -8, 3, -8, 8, -8, 11, -8,
217  -5, -7, -2, -7, 0, -7, 2, -7, 5, -7,
218  -22, -6, -9, -6, -6, -6, -3, -6, -1, -6,
219  1, -6, 3, -6, 6, -6, 9, -6, 22, -6,
220  -17, -5, -7, -5, -4, -5, -2, -5, -1, -5,
221  0, -5, 1, -5, 2, -5, 4, -5, 7, -5,
222  17, -5, -13, -4, -10, -4, -5, -4, -3, -4,
223  -2, -4, -1, -4, 0, -4, 1, -4, 2, -4,
224  3, -4, 5, -4, 10, -4, 13, -4, -8, -3,
225  -6, -3, -4, -3, -3, -3, -2, -3, -1, -3,
226  0, -3, 1, -3, 2, -3, 3, -3, 4, -3,
227  6, -3, 8, -3, -11, -2, -7, -2, -5, -2,
228  -4, -2, -3, -2, -2, -2, -1, -2, 0, -2,
229  1, -2, 2, -2, 3, -2, 4, -2, 5, -2,
230  7, -2, 11, -2, -9, -1, -6, -1, -5, -1,
231  -4, -1, -3, -1, -2, -1, -1, -1, 0, -1,
232  1, -1, 2, -1, 3, -1, 4, -1, 5, -1,
233  6, -1, 9, -1, -23, 0, -18, 0, -14, 0,
234  -11, 0, -7, 0, -5, 0, -4, 0, -3, 0,
235  -2, 0, -1, 0, 0, -23, 1, 0, 2, 0,
236  3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
237  14, 0, 18, 0, 23, 0, -9, 1, -6, 1,
238  -5, 1, -4, 1, -3, 1, -2, 1, -1, 1,
239  0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
240  5, 1, 6, 1, 9, 1, -11, 2, -7, 2,
241  -5, 2, -4, 2, -3, 2, -2, 2, -1, 2,
242  0, 2, 1, 2, 2, 2, 3, 2, 4, 2,
243  5, 2, 7, 2, 11, 2, -8, 3, -6, 3,
244  -4, 3, -3, 3, -2, 3, -1, 3, 0, 3,
245  1, 3, 2, 3, 3, 3, 4, 3, 6, 3,
246  8, 3, -13, 4, -10, 4, -5, 4, -3, 4,
247  -2, 4, -1, 4, 0, 4, 1, 4, 2, 4,
248  3, 4, 5, 4, 10, 4, 13, 4, -17, 5,
249  -7, 5, -4, 5, -2, 5, -1, 5, 0, 5,
250  1, 5, 2, 5, 4, 5, 7, 5, 17, 5,
251  -22, 6, -9, 6, -6, 6, -3, 6, -1, 6,
252  1, 6, 3, 6, 6, 6, 9, 6, 22, 6,
253  -5, 7, -2, 7, 0, 7, 2, 7, 5, 7,
254  -11, 8, -8, 8, -3, 8, 0, 8, 3, 8,
255  8, 8, 11, 8, -6, 9, -1, 9, 1, 9,
256  6, 9, -15, 10, -4, 10, 4, 10, 15, 10,
257  -8, 11, -2, 11, 0, 11, 2, 11, 8, 11,
258  19, 12, -19, 13, -4, 13, 4, 13, 0, 14,
259  -10, 15, 10, 15, -5, 17, 5, 17, 0, 18,
260  -12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
261 };
262 
263 typedef struct SANMVideoContext {
264  AVCodecContext *avctx;
265  GetByteContext gb;
266 
267  int version, subversion;
268  uint32_t pal[PALETTE_SIZE];
269  int16_t delta_pal[PALETTE_DELTA];
270 
271  int pitch;
272  int width, height;
273  int aligned_width, aligned_height;
274  int prev_seq;
275 
276  AVFrame *frame;
277  uint16_t *frm0, *frm1, *frm2;
278  uint8_t *stored_frame;
279  uint32_t frm0_size, frm1_size, frm2_size;
280  uint32_t stored_frame_size;
281 
282  uint8_t *rle_buf;
283  unsigned int rle_buf_size;
284 
285  int rotate_code;
286 
287  long npixels, buf_size;
288 
289  uint16_t codebook[256];
290  uint16_t small_codebook[4];
291 
292  int8_t p4x4glyphs[NGLYPHS][16];
293  int8_t p8x8glyphs[NGLYPHS][64];
294 } SANMVideoContext;
295 
296 typedef struct SANMFrameHeader {
297  int seq_num, codec, rotate_code, rle_output_size;
298 
299  uint16_t bg_color;
300  uint32_t width, height;
301 } SANMFrameHeader;
302 
303 enum GlyphEdge {
304  LEFT_EDGE,
305  TOP_EDGE,
306  RIGHT_EDGE,
307  BOTTOM_EDGE,
308  NO_EDGE
309 };
310 
311 enum GlyphDir {
312  DIR_LEFT,
313  DIR_UP,
314  DIR_RIGHT,
315  DIR_DOWN,
316  NO_DIR
317 };
318 
319 /**
320  * Return enum GlyphEdge of box where point (x, y) lies.
321  *
322  * @param x x point coordinate
323  * @param y y point coordinate
324  * @param edge_size box width/height.
325  */
326 static enum GlyphEdge which_edge(int x, int y, int edge_size)
327 {
328  const int edge_max = edge_size - 1;
329 
330  if (!y)
331  return BOTTOM_EDGE;
332  else if (y == edge_max)
333  return TOP_EDGE;
334  else if (!x)
335  return LEFT_EDGE;
336  else if (x == edge_max)
337  return RIGHT_EDGE;
338  else
339  return NO_EDGE;
340 }
341 
342 static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1)
343 {
344  if ((edge0 == LEFT_EDGE && edge1 == RIGHT_EDGE) ||
345  (edge1 == LEFT_EDGE && edge0 == RIGHT_EDGE) ||
346  (edge0 == BOTTOM_EDGE && edge1 != TOP_EDGE) ||
347  (edge1 == BOTTOM_EDGE && edge0 != TOP_EDGE))
348  return DIR_UP;
349  else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) ||
350  (edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE))
351  return DIR_DOWN;
352  else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) ||
353  (edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE))
354  return DIR_LEFT;
355  else if ((edge0 == TOP_EDGE && edge1 == BOTTOM_EDGE) ||
356  (edge1 == TOP_EDGE && edge0 == BOTTOM_EDGE) ||
357  (edge0 == RIGHT_EDGE && edge1 != LEFT_EDGE) ||
358  (edge1 == RIGHT_EDGE && edge0 != LEFT_EDGE))
359  return DIR_RIGHT;
360 
361  return NO_DIR;
362 }
363 
364 /* Interpolate two points. */
365 static void interp_point(int8_t *points, int x0, int y0, int x1, int y1,
366  int pos, int npoints)
367 {
368  if (npoints) {
369  points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints;
370  points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints;
371  } else {
372  points[0] = x0;
373  points[1] = y0;
374  }
375 }
376 
377 /**
378  * Construct glyphs by iterating through vector coordinates.
379  *
380  * @param pglyphs pointer to table where glyphs are stored
381  * @param xvec pointer to x component of vector coordinates
382  * @param yvec pointer to y component of vector coordinates
383  * @param side_length glyph width/height.
384  */
385 static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec,
386  const int side_length)
387 {
388  const int glyph_size = side_length * side_length;
389  int8_t *pglyph = pglyphs;
390 
391  int i, j;
392  for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) {
393  int x0 = xvec[i];
394  int y0 = yvec[i];
395  enum GlyphEdge edge0 = which_edge(x0, y0, side_length);
396 
397  for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) {
398  int x1 = xvec[j];
399  int y1 = yvec[j];
400  enum GlyphEdge edge1 = which_edge(x1, y1, side_length);
401  enum GlyphDir dir = which_direction(edge0, edge1);
402  int npoints = FFMAX(FFABS(x1 - x0), FFABS(y1 - y0));
403  int ipoint;
404 
405  for (ipoint = 0; ipoint <= npoints; ipoint++) {
406  int8_t point[2];
407  int irow, icol;
408 
409  interp_point(point, x0, y0, x1, y1, ipoint, npoints);
410 
411  switch (dir) {
412  case DIR_UP:
413  for (irow = point[1]; irow >= 0; irow--)
414  pglyph[point[0] + irow * side_length] = 1;
415  break;
416 
417  case DIR_DOWN:
418  for (irow = point[1]; irow < side_length; irow++)
419  pglyph[point[0] + irow * side_length] = 1;
420  break;
421 
422  case DIR_LEFT:
423  for (icol = point[0]; icol >= 0; icol--)
424  pglyph[icol + point[1] * side_length] = 1;
425  break;
426 
427  case DIR_RIGHT:
428  for (icol = point[0]; icol < side_length; icol++)
429  pglyph[icol + point[1] * side_length] = 1;
430  break;
431  }
432  }
433  }
434  }
435 }
436 
437 static void init_sizes(SANMVideoContext *ctx, int width, int height)
438 {
439  ctx->width = width;
440  ctx->height = height;
441  ctx->npixels = width * height;
442 
443  ctx->aligned_width = FFALIGN(width, 8);
444  ctx->aligned_height = FFALIGN(height, 8);
445 
446  ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]);
447  ctx->pitch = width;
448 }
449 
450 static void destroy_buffers(SANMVideoContext *ctx)
451 {
452  av_freep(&ctx->frm0);
453  av_freep(&ctx->frm1);
454  av_freep(&ctx->frm2);
455  av_freep(&ctx->stored_frame);
456  av_freep(&ctx->rle_buf);
457  ctx->frm0_size =
458  ctx->frm1_size =
459  ctx->frm2_size = 0;
460  init_sizes(ctx, 0, 0);
461 }
462 
463 static av_cold int init_buffers(SANMVideoContext *ctx)
464 {
465  av_fast_padded_malloc(&ctx->frm0, &ctx->frm0_size, ctx->buf_size);
466  av_fast_padded_malloc(&ctx->frm1, &ctx->frm1_size, ctx->buf_size);
467  av_fast_padded_malloc(&ctx->frm2, &ctx->frm2_size, ctx->buf_size);
468  if (!ctx->version)
469  av_fast_padded_malloc(&ctx->stored_frame,
470  &ctx->stored_frame_size, ctx->buf_size);
471 
472  if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 ||
473  (!ctx->stored_frame && !ctx->version)) {
474  destroy_buffers(ctx);
475  return AVERROR(ENOMEM);
476  }
477 
478  return 0;
479 }
480 
481 static void rotate_bufs(SANMVideoContext *ctx, int rotate_code)
482 {
483  if (rotate_code == 2)
484  FFSWAP(uint16_t*, ctx->frm1, ctx->frm2);
485  FFSWAP(uint16_t*, ctx->frm2, ctx->frm0);
486 }
487 
488 static av_cold int decode_init(AVCodecContext *avctx)
489 {
490  SANMVideoContext *ctx = avctx->priv_data;
491 
492  ctx->avctx = avctx;
493  ctx->version = !avctx->extradata_size;
494 
495  avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8;
496 
497  init_sizes(ctx, avctx->width, avctx->height);
498  if (init_buffers(ctx)) {
499  av_log(avctx, AV_LOG_ERROR, "Error allocating buffers.\n");
500  return AVERROR(ENOMEM);
501  }
502 
503  make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4);
504  make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8);
505 
506  if (!ctx->version) {
507  int i;
508 
509  if (avctx->extradata_size < 1026) {
510  av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n");
511  return AVERROR_INVALIDDATA;
512  }
513 
514  ctx->subversion = AV_RL16(avctx->extradata);
515  for (i = 0; i < PALETTE_SIZE; i++)
516  ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4);
517  }
518 
519  return 0;
520 }
521 
522 static av_cold int decode_end(AVCodecContext *avctx)
523 {
524  SANMVideoContext *ctx = avctx->priv_data;
525 
526  destroy_buffers(ctx);
527 
528  return 0;
529 }
530 
531 static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size)
532 {
533  int opcode, color, run_len, left = out_size;
534 
535  while (left > 0) {
536  opcode = bytestream2_get_byte(&ctx->gb);
537  run_len = (opcode >> 1) + 1;
538  if (run_len > left || bytestream2_get_bytes_left(&ctx->gb) <= 0)
539  return AVERROR_INVALIDDATA;
540 
541  if (opcode & 1) {
542  color = bytestream2_get_byte(&ctx->gb);
543  memset(dst, color, run_len);
544  } else {
545  if (bytestream2_get_bytes_left(&ctx->gb) < run_len)
546  return AVERROR_INVALIDDATA;
547  bytestream2_get_bufferu(&ctx->gb, dst, run_len);
548  }
549 
550  dst += run_len;
551  left -= run_len;
552  }
553 
554  return 0;
555 }
556 
557 static int old_codec1(SANMVideoContext *ctx, int top,
558  int left, int width, int height)
559 {
560  uint8_t *dst = ((uint8_t *)ctx->frm0) + left + top * ctx->pitch;
561  int i, j, len, flag, code, val, pos, end;
562 
563  for (i = 0; i < height; i++) {
564  pos = 0;
565 
566  if (bytestream2_get_bytes_left(&ctx->gb) < 2)
567  return AVERROR_INVALIDDATA;
568 
569  len = bytestream2_get_le16u(&ctx->gb);
570  end = bytestream2_tell(&ctx->gb) + len;
571 
572  while (bytestream2_tell(&ctx->gb) < end) {
573  if (bytestream2_get_bytes_left(&ctx->gb) < 2)
574  return AVERROR_INVALIDDATA;
575 
576  code = bytestream2_get_byteu(&ctx->gb);
577  flag = code & 1;
578  code = (code >> 1) + 1;
579  if (pos + code > width)
580  return AVERROR_INVALIDDATA;
581  if (flag) {
582  val = bytestream2_get_byteu(&ctx->gb);
583  if (val)
584  memset(dst + pos, val, code);
585  pos += code;
586  } else {
587  if (bytestream2_get_bytes_left(&ctx->gb) < code)
588  return AVERROR_INVALIDDATA;
589  for (j = 0; j < code; j++) {
590  val = bytestream2_get_byteu(&ctx->gb);
591  if (val)
592  dst[pos] = val;
593  pos++;
594  }
595  }
596  }
597  dst += ctx->pitch;
598  }
599  ctx->rotate_code = 0;
600 
601  return 0;
602 }
603 
604 static inline void codec37_mv(uint8_t *dst, const uint8_t *src,
605  int height, int stride, int x, int y)
606 {
607  int pos, i, j;
608 
609  pos = x + y * stride;
610  for (j = 0; j < 4; j++) {
611  for (i = 0; i < 4; i++) {
612  if ((pos + i) < 0 || (pos + i) >= height * stride)
613  dst[i] = 0;
614  else
615  dst[i] = src[i];
616  }
617  dst += stride;
618  src += stride;
619  pos += stride;
620  }
621 }
622 
623 static int old_codec37(SANMVideoContext *ctx, int top,
624  int left, int width, int height)
625 {
626  int stride = ctx->pitch;
627  int i, j, k, t;
628  uint8_t *dst, *prev;
629  int skip_run = 0;
630  int compr = bytestream2_get_byte(&ctx->gb);
631  int mvoff = bytestream2_get_byte(&ctx->gb);
632  int seq = bytestream2_get_le16(&ctx->gb);
633  uint32_t decoded_size = bytestream2_get_le32(&ctx->gb);
634  int flags;
635 
636  bytestream2_skip(&ctx->gb, 4);
637  flags = bytestream2_get_byte(&ctx->gb);
638  bytestream2_skip(&ctx->gb, 3);
639 
640  if (decoded_size > ctx->height * stride - left - top * stride) {
641  decoded_size = ctx->height * stride - left - top * stride;
642  av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n");
643  }
644 
645  ctx->rotate_code = 0;
646 
647  if (((seq & 1) || !(flags & 1)) && (compr && compr != 2))
648  rotate_bufs(ctx, 1);
649 
650  dst = ((uint8_t*)ctx->frm0) + left + top * stride;
651  prev = ((uint8_t*)ctx->frm2) + left + top * stride;
652 
653  if (mvoff > 2) {
654  av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvoff);
655  return AVERROR_INVALIDDATA;
656  }
657 
658  switch (compr) {
659  case 0:
660  for (i = 0; i < height; i++) {
661  bytestream2_get_buffer(&ctx->gb, dst, width);
662  dst += stride;
663  }
664  memset(ctx->frm1, 0, ctx->height * stride);
665  memset(ctx->frm2, 0, ctx->height * stride);
666  break;
667  case 2:
668  if (rle_decode(ctx, dst, decoded_size))
669  return AVERROR_INVALIDDATA;
670  memset(ctx->frm1, 0, ctx->frm1_size);
671  memset(ctx->frm2, 0, ctx->frm2_size);
672  break;
673  case 3:
674  case 4:
675  if (flags & 4) {
676  for (j = 0; j < height; j += 4) {
677  for (i = 0; i < width; i += 4) {
678  int code;
679  if (skip_run) {
680  skip_run--;
681  copy_block4(dst + i, prev + i, stride, stride, 4);
682  continue;
683  }
684  if (bytestream2_get_bytes_left(&ctx->gb) < 1)
685  return AVERROR_INVALIDDATA;
686  code = bytestream2_get_byteu(&ctx->gb);
687  switch (code) {
688  case 0xFF:
689  if (bytestream2_get_bytes_left(&ctx->gb) < 16)
690  return AVERROR_INVALIDDATA;
691  for (k = 0; k < 4; k++)
692  bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4);
693  break;
694  case 0xFE:
695  if (bytestream2_get_bytes_left(&ctx->gb) < 4)
696  return AVERROR_INVALIDDATA;
697  for (k = 0; k < 4; k++)
698  memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4);
699  break;
700  case 0xFD:
701  if (bytestream2_get_bytes_left(&ctx->gb) < 1)
702  return AVERROR_INVALIDDATA;
703  t = bytestream2_get_byteu(&ctx->gb);
704  for (k = 0; k < 4; k++)
705  memset(dst + i + k * stride, t, 4);
706  break;
707  default:
708  if (compr == 4 && !code) {
709  if (bytestream2_get_bytes_left(&ctx->gb) < 1)
710  return AVERROR_INVALIDDATA;
711  skip_run = bytestream2_get_byteu(&ctx->gb) + 1;
712  i -= 4;
713  } else {
714  int mx, my;
715 
716  mx = c37_mv[(mvoff * 255 + code) * 2];
717  my = c37_mv[(mvoff * 255 + code) * 2 + 1];
718  codec37_mv(dst + i, prev + i + mx + my * stride,
719  ctx->height, stride, i + mx, j + my);
720  }
721  }
722  }
723  dst += stride * 4;
724  prev += stride * 4;
725  }
726  } else {
727  for (j = 0; j < height; j += 4) {
728  for (i = 0; i < width; i += 4) {
729  int code;
730  if (skip_run) {
731  skip_run--;
732  copy_block4(dst + i, prev + i, stride, stride, 4);
733  continue;
734  }
735  code = bytestream2_get_byte(&ctx->gb);
736  if (code == 0xFF) {
737  if (bytestream2_get_bytes_left(&ctx->gb) < 16)
738  return AVERROR_INVALIDDATA;
739  for (k = 0; k < 4; k++)
740  bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4);
741  } else if (compr == 4 && !code) {
742  if (bytestream2_get_bytes_left(&ctx->gb) < 1)
743  return AVERROR_INVALIDDATA;
744  skip_run = bytestream2_get_byteu(&ctx->gb) + 1;
745  i -= 4;
746  } else {
747  int mx, my;
748 
749  mx = c37_mv[(mvoff * 255 + code) * 2];
750  my = c37_mv[(mvoff * 255 + code) * 2 + 1];
751  codec37_mv(dst + i, prev + i + mx + my * stride,
752  ctx->height, stride, i + mx, j + my);
753  }
754  }
755  dst += stride * 4;
756  prev += stride * 4;
757  }
758  }
759  break;
760  default:
761  avpriv_report_missing_feature(ctx->avctx,
762  "Subcodec 37 compression %d", compr);
763  return AVERROR_PATCHWELCOME;
764  }
765 
766  return 0;
767 }
768 
769 static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1,
770  uint8_t *prev2, int stride, int tbl, int size)
771 {
772  int code, k, t;
773  uint8_t colors[2];
774  int8_t *pglyph;
775 
776  if (bytestream2_get_bytes_left(&ctx->gb) < 1)
777  return AVERROR_INVALIDDATA;
778 
779  code = bytestream2_get_byteu(&ctx->gb);
780  if (code >= 0xF8) {
781  switch (code) {
782  case 0xFF:
783  if (size == 2) {
784  if (bytestream2_get_bytes_left(&ctx->gb) < 4)
785  return AVERROR_INVALIDDATA;
786  dst[0] = bytestream2_get_byteu(&ctx->gb);
787  dst[1] = bytestream2_get_byteu(&ctx->gb);
788  dst[0 + stride] = bytestream2_get_byteu(&ctx->gb);
789  dst[1 + stride] = bytestream2_get_byteu(&ctx->gb);
790  } else {
791  size >>= 1;
792  if (process_block(ctx, dst, prev1, prev2, stride, tbl, size))
793  return AVERROR_INVALIDDATA;
794  if (process_block(ctx, dst + size, prev1 + size, prev2 + size,
795  stride, tbl, size))
796  return AVERROR_INVALIDDATA;
797  dst += size * stride;
798  prev1 += size * stride;
799  prev2 += size * stride;
800  if (process_block(ctx, dst, prev1, prev2, stride, tbl, size))
801  return AVERROR_INVALIDDATA;
802  if (process_block(ctx, dst + size, prev1 + size, prev2 + size,
803  stride, tbl, size))
804  return AVERROR_INVALIDDATA;
805  }
806  break;
807  case 0xFE:
808  if (bytestream2_get_bytes_left(&ctx->gb) < 1)
809  return AVERROR_INVALIDDATA;
810 
811  t = bytestream2_get_byteu(&ctx->gb);
812  for (k = 0; k < size; k++)
813  memset(dst + k * stride, t, size);
814  break;
815  case 0xFD:
816  if (bytestream2_get_bytes_left(&ctx->gb) < 3)
817  return AVERROR_INVALIDDATA;
818 
819  code = bytestream2_get_byteu(&ctx->gb);
820  pglyph = (size == 8) ? ctx->p8x8glyphs[code] : ctx->p4x4glyphs[code];
821  bytestream2_get_bufferu(&ctx->gb, colors, 2);
822 
823  for (k = 0; k < size; k++)
824  for (t = 0; t < size; t++)
825  dst[t + k * stride] = colors[!*pglyph++];
826  break;
827  case 0xFC:
828  for (k = 0; k < size; k++)
829  memcpy(dst + k * stride, prev1 + k * stride, size);
830  break;
831  default:
832  k = bytestream2_tell(&ctx->gb);
833  bytestream2_seek(&ctx->gb, tbl + (code & 7), SEEK_SET);
834  t = bytestream2_get_byte(&ctx->gb);
835  bytestream2_seek(&ctx->gb, k, SEEK_SET);
836  for (k = 0; k < size; k++)
837  memset(dst + k * stride, t, size);
838  }
839  } else {
840  int mx = motion_vectors[code][0];
841  int my = motion_vectors[code][1];
842  int index = prev2 - (const uint8_t *)ctx->frm2;
843 
844  av_assert2(index >= 0 && index < (ctx->buf_size >> 1));
845 
846  if (index < -mx - my * stride ||
847  (ctx->buf_size >> 1) - index < mx + size + (my + size - 1) * stride) {
848  av_log(ctx->avctx, AV_LOG_ERROR, "MV is invalid.\n");
849  return AVERROR_INVALIDDATA;
850  }
851 
852  for (k = 0; k < size; k++)
853  memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size);
854  }
855 
856  return 0;
857 }
858 
859 static int old_codec47(SANMVideoContext *ctx, int top,
860  int left, int width, int height)
861 {
862  uint32_t decoded_size;
863  int i, j;
864  int stride = ctx->pitch;
865  uint8_t *dst = (uint8_t *)ctx->frm0 + left + top * stride;
866  uint8_t *prev1 = (uint8_t *)ctx->frm1;
867  uint8_t *prev2 = (uint8_t *)ctx->frm2;
868  int tbl_pos = bytestream2_tell(&ctx->gb);
869  int seq = bytestream2_get_le16(&ctx->gb);
870  int compr = bytestream2_get_byte(&ctx->gb);
871  int new_rot = bytestream2_get_byte(&ctx->gb);
872  int skip = bytestream2_get_byte(&ctx->gb);
873 
874  bytestream2_skip(&ctx->gb, 9);
875  decoded_size = bytestream2_get_le32(&ctx->gb);
876  bytestream2_skip(&ctx->gb, 8);
877 
878  if (decoded_size > ctx->height * stride - left - top * stride) {
879  decoded_size = ctx->height * stride - left - top * stride;
880  av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n");
881  }
882 
883  if (skip & 1)
884  bytestream2_skip(&ctx->gb, 0x8080);
885  if (!seq) {
886  ctx->prev_seq = -1;
887  memset(prev1, 0, ctx->height * stride);
888  memset(prev2, 0, ctx->height * stride);
889  }
890 
891  switch (compr) {
892  case 0:
893  if (bytestream2_get_bytes_left(&ctx->gb) < width * height)
894  return AVERROR_INVALIDDATA;
895  for (j = 0; j < height; j++) {
896  bytestream2_get_bufferu(&ctx->gb, dst, width);
897  dst += stride;
898  }
899  break;
900  case 1:
901  if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1))
902  return AVERROR_INVALIDDATA;
903  for (j = 0; j < height; j += 2) {
904  for (i = 0; i < width; i += 2) {
905  dst[i] =
906  dst[i + 1] =
907  dst[stride + i] =
908  dst[stride + i + 1] = bytestream2_get_byteu(&ctx->gb);
909  }
910  dst += stride * 2;
911  }
912  break;
913  case 2:
914  if (seq == ctx->prev_seq + 1) {
915  for (j = 0; j < height; j += 8) {
916  for (i = 0; i < width; i += 8)
917  if (process_block(ctx, dst + i, prev1 + i, prev2 + i, stride,
918  tbl_pos + 8, 8))
919  return AVERROR_INVALIDDATA;
920  dst += stride * 8;
921  prev1 += stride * 8;
922  prev2 += stride * 8;
923  }
924  }
925  break;
926  case 3:
927  memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height);
928  break;
929  case 4:
930  memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height);
931  break;
932  case 5:
933  if (rle_decode(ctx, dst, decoded_size))
934  return AVERROR_INVALIDDATA;
935  break;
936  default:
937  avpriv_report_missing_feature(ctx->avctx,
938  "Subcodec 47 compression %d", compr);
939  return AVERROR_PATCHWELCOME;
940  }
941  if (seq == ctx->prev_seq + 1)
942  ctx->rotate_code = new_rot;
943  else
944  ctx->rotate_code = 0;
945  ctx->prev_seq = seq;
946 
947  return 0;
948 }
949 
950 static int process_frame_obj(SANMVideoContext *ctx)
951 {
952  uint16_t codec = bytestream2_get_le16u(&ctx->gb);
953  uint16_t left = bytestream2_get_le16u(&ctx->gb);
954  uint16_t top = bytestream2_get_le16u(&ctx->gb);
955  uint16_t w = bytestream2_get_le16u(&ctx->gb);
956  uint16_t h = bytestream2_get_le16u(&ctx->gb);
957 
958  if (!w || !h) {
959  av_log(ctx->avctx, AV_LOG_ERROR, "Dimensions are invalid.\n");
960  return AVERROR_INVALIDDATA;
961  }
962 
963  if (ctx->width < left + w || ctx->height < top + h) {
964  int ret = ff_set_dimensions(ctx->avctx, FFMAX(left + w, ctx->width),
965  FFMAX(top + h, ctx->height));
966  if (ret < 0)
967  return ret;
968  init_sizes(ctx, FFMAX(left + w, ctx->width),
969  FFMAX(top + h, ctx->height));
970  if (init_buffers(ctx)) {
971  av_log(ctx->avctx, AV_LOG_ERROR, "Error resizing buffers.\n");
972  return AVERROR(ENOMEM);
973  }
974  }
975  bytestream2_skip(&ctx->gb, 4);
976 
977  switch (codec) {
978  case 1:
979  case 3:
980  return old_codec1(ctx, top, left, w, h);
981  break;
982  case 37:
983  return old_codec37(ctx, top, left, w, h);
984  break;
985  case 47:
986  return old_codec47(ctx, top, left, w, h);
987  break;
988  default:
989  avpriv_request_sample(ctx->avctx, "Subcodec %d", codec);
990  return AVERROR_PATCHWELCOME;
991  }
992 }
993 
994 static int decode_0(SANMVideoContext *ctx)
995 {
996  uint16_t *frm = ctx->frm0;
997  int x, y;
998 
999  if (bytestream2_get_bytes_left(&ctx->gb) < ctx->width * ctx->height * 2) {
1000  av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for raw frame.\n");
1001  return AVERROR_INVALIDDATA;
1002  }
1003  for (y = 0; y < ctx->height; y++) {
1004  for (x = 0; x < ctx->width; x++)
1005  frm[x] = bytestream2_get_le16u(&ctx->gb);
1006  frm += ctx->pitch;
1007  }
1008  return 0;
1009 }
1010 
1011 static int decode_nop(SANMVideoContext *ctx)
1012 {
1013  avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type");
1014  return AVERROR_PATCHWELCOME;
1015 }
1016 
1017 static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, int pitch)
1018 {
1019  uint8_t *dst = (uint8_t *)pdest;
1020  uint8_t *src = (uint8_t *)psrc;
1021  int stride = pitch * 2;
1022 
1023  switch (block_size) {
1024  case 2:
1025  copy_block4(dst, src, stride, stride, 2);
1026  break;
1027  case 4:
1028  copy_block8(dst, src, stride, stride, 4);
1029  break;
1030  case 8:
1031  copy_block16(dst, src, stride, stride, 8);
1032  break;
1033  }
1034 }
1035 
1036 static void fill_block(uint16_t *pdest, uint16_t color, int block_size, int pitch)
1037 {
1038  int x, y;
1039 
1040  pitch -= block_size;
1041  for (y = 0; y < block_size; y++, pdest += pitch)
1042  for (x = 0; x < block_size; x++)
1043  *pdest++ = color;
1044 }
1045 
1046 static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index,
1047  uint16_t fg_color, uint16_t bg_color, int block_size,
1048  int pitch)
1049 {
1050  int8_t *pglyph;
1051  uint16_t colors[2] = { fg_color, bg_color };
1052  int x, y;
1053 
1054  if (index >= NGLYPHS) {
1055  av_log(ctx->avctx, AV_LOG_ERROR, "Ignoring nonexistent glyph #%u.\n", index);
1056  return AVERROR_INVALIDDATA;
1057  }
1058 
1059  pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index];
1060  pitch -= block_size;
1061 
1062  for (y = 0; y < block_size; y++, dst += pitch)
1063  for (x = 0; x < block_size; x++)
1064  *dst++ = colors[*pglyph++];
1065  return 0;
1066 }
1067 
1068 static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
1069 {
1070  uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
1071 
1072  if (block_size == 2) {
1073  uint32_t indices;
1074 
1075  if (bytestream2_get_bytes_left(&ctx->gb) < 4)
1076  return AVERROR_INVALIDDATA;
1077 
1078  indices = bytestream2_get_le32u(&ctx->gb);
1079  dst[0] = ctx->codebook[indices & 0xFF];
1080  indices >>= 8;
1081  dst[1] = ctx->codebook[indices & 0xFF];
1082  indices >>= 8;
1083  dst[pitch] = ctx->codebook[indices & 0xFF];
1084  indices >>= 8;
1085  dst[pitch + 1] = ctx->codebook[indices & 0xFF];
1086  } else {
1087  uint16_t fgcolor, bgcolor;
1088  int glyph;
1089 
1090  if (bytestream2_get_bytes_left(&ctx->gb) < 3)
1091  return AVERROR_INVALIDDATA;
1092 
1093  glyph = bytestream2_get_byteu(&ctx->gb);
1094  bgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1095  fgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1096 
1097  draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
1098  }
1099  return 0;
1100 }
1101 
1102 static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
1103 {
1104  uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
1105 
1106  if (block_size == 2) {
1107  if (bytestream2_get_bytes_left(&ctx->gb) < 8)
1108  return AVERROR_INVALIDDATA;
1109 
1110  dst[0] = bytestream2_get_le16u(&ctx->gb);
1111  dst[1] = bytestream2_get_le16u(&ctx->gb);
1112  dst[pitch] = bytestream2_get_le16u(&ctx->gb);
1113  dst[pitch + 1] = bytestream2_get_le16u(&ctx->gb);
1114  } else {
1115  uint16_t fgcolor, bgcolor;
1116  int glyph;
1117 
1118  if (bytestream2_get_bytes_left(&ctx->gb) < 5)
1119  return AVERROR_INVALIDDATA;
1120 
1121  glyph = bytestream2_get_byteu(&ctx->gb);
1122  bgcolor = bytestream2_get_le16u(&ctx->gb);
1123  fgcolor = bytestream2_get_le16u(&ctx->gb);
1124 
1125  draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
1126  }
1127  return 0;
1128 }
1129 
1130 static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my,
1131  int block_size)
1132 {
1133  int start_pos = cx + mx + (cy + my) * ctx->pitch;
1134  int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1);
1135 
1136  int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1);
1137 
1138  if (!good)
1139  av_log(ctx->avctx, AV_LOG_ERROR,
1140  "Ignoring invalid motion vector (%i, %i)->(%u, %u), block size = %u\n",
1141  cx + mx, cy + my, cx, cy, block_size);
1142 
1143  return good;
1144 }
1145 
1146 static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size)
1147 {
1148  int16_t mx, my, index;
1149  int opcode;
1150 
1151  if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1152  return AVERROR_INVALIDDATA;
1153 
1154  opcode = bytestream2_get_byteu(&ctx->gb);
1155 
1156  switch (opcode) {
1157  default:
1158  mx = motion_vectors[opcode][0];
1159  my = motion_vectors[opcode][1];
1160 
1161  if (good_mvec(ctx, cx, cy, mx, my, blk_size)) {
1162  copy_block(ctx->frm0 + cx + ctx->pitch * cy,
1163  ctx->frm2 + cx + mx + ctx->pitch * (cy + my),
1164  blk_size, ctx->pitch);
1165  }
1166  break;
1167  case 0xF5:
1168  if (bytestream2_get_bytes_left(&ctx->gb) < 2)
1169  return AVERROR_INVALIDDATA;
1170  index = bytestream2_get_le16u(&ctx->gb);
1171 
1172  mx = index % ctx->width;
1173  my = index / ctx->width;
1174 
1175  if (good_mvec(ctx, cx, cy, mx, my, blk_size)) {
1176  copy_block(ctx->frm0 + cx + ctx->pitch * cy,
1177  ctx->frm2 + cx + mx + ctx->pitch * (cy + my),
1178  blk_size, ctx->pitch);
1179  }
1180  break;
1181  case 0xF6:
1182  copy_block(ctx->frm0 + cx + ctx->pitch * cy,
1183  ctx->frm1 + cx + ctx->pitch * cy,
1184  blk_size, ctx->pitch);
1185  break;
1186  case 0xF7:
1187  opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch);
1188  break;
1189 
1190  case 0xF8:
1191  opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
1192  break;
1193  case 0xF9:
1194  case 0xFA:
1195  case 0xFB:
1196  case 0xFC:
1197  fill_block(ctx->frm0 + cx + cy * ctx->pitch,
1198  ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch);
1199  break;
1200  case 0xFD:
1201  if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1202  return AVERROR_INVALIDDATA;
1203  fill_block(ctx->frm0 + cx + cy * ctx->pitch,
1204  ctx->codebook[bytestream2_get_byteu(&ctx->gb)], blk_size, ctx->pitch);
1205  break;
1206  case 0xFE:
1207  if (bytestream2_get_bytes_left(&ctx->gb) < 2)
1208  return AVERROR_INVALIDDATA;
1209  fill_block(ctx->frm0 + cx + cy * ctx->pitch,
1210  bytestream2_get_le16u(&ctx->gb), blk_size, ctx->pitch);
1211  break;
1212  case 0xFF:
1213  if (blk_size == 2) {
1214  opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
1215  } else {
1216  blk_size >>= 1;
1217  if (codec2subblock(ctx, cx, cy, blk_size))
1218  return AVERROR_INVALIDDATA;
1219  if (codec2subblock(ctx, cx + blk_size, cy, blk_size))
1220  return AVERROR_INVALIDDATA;
1221  if (codec2subblock(ctx, cx, cy + blk_size, blk_size))
1222  return AVERROR_INVALIDDATA;
1223  if (codec2subblock(ctx, cx + blk_size, cy + blk_size, blk_size))
1224  return AVERROR_INVALIDDATA;
1225  }
1226  break;
1227  }
1228  return 0;
1229 }
1230 
1231 static int decode_2(SANMVideoContext *ctx)
1232 {
1233  int cx, cy, ret;
1234 
1235  for (cy = 0; cy < ctx->aligned_height; cy += 8)
1236  for (cx = 0; cx < ctx->aligned_width; cx += 8)
1237  if (ret = codec2subblock(ctx, cx, cy, 8))
1238  return ret;
1239 
1240  return 0;
1241 }
1242 
1243 static int decode_3(SANMVideoContext *ctx)
1244 {
1245  memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size);
1246  return 0;
1247 }
1248 
1249 static int decode_4(SANMVideoContext *ctx)
1250 {
1251  memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size);
1252  return 0;
1253 }
1254 
1255 static int decode_5(SANMVideoContext *ctx)
1256 {
1257 #if HAVE_BIGENDIAN
1258  uint16_t *frm;
1259  int npixels;
1260 #endif
1261  uint8_t *dst = (uint8_t*)ctx->frm0;
1262 
1263  if (rle_decode(ctx, dst, ctx->buf_size))
1264  return AVERROR_INVALIDDATA;
1265 
1266 #if HAVE_BIGENDIAN
1267  npixels = ctx->npixels;
1268  frm = ctx->frm0;
1269  while (npixels--) {
1270  *frm = av_bswap16(*frm);
1271  frm++;
1272  }
1273 #endif
1274 
1275  return 0;
1276 }
1277 
1278 static int decode_6(SANMVideoContext *ctx)
1279 {
1280  int npixels = ctx->npixels;
1281  uint16_t *frm = ctx->frm0;
1282 
1283  if (bytestream2_get_bytes_left(&ctx->gb) < npixels) {
1284  av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for frame.\n");
1285  return AVERROR_INVALIDDATA;
1286  }
1287  while (npixels--)
1288  *frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1289 
1290  return 0;
1291 }
1292 
1293 static int decode_8(SANMVideoContext *ctx)
1294 {
1295  uint16_t *pdest = ctx->frm0;
1296  uint8_t *rsrc;
1297  long npixels = ctx->npixels;
1298 
1299  av_fast_malloc(&ctx->rle_buf, &ctx->rle_buf_size, npixels);
1300  if (!ctx->rle_buf) {
1301  av_log(ctx->avctx, AV_LOG_ERROR, "RLE buffer allocation failed.\n");
1302  return AVERROR(ENOMEM);
1303  }
1304  rsrc = ctx->rle_buf;
1305 
1306  if (rle_decode(ctx, rsrc, npixels))
1307  return AVERROR_INVALIDDATA;
1308 
1309  while (npixels--)
1310  *pdest++ = ctx->codebook[*rsrc++];
1311 
1312  return 0;
1313 }
1314 
1315 typedef int (*frm_decoder)(SANMVideoContext *ctx);
1316 
1317 static const frm_decoder v1_decoders[] = {
1318  decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5,
1319  decode_6, decode_nop, decode_8
1320 };
1321 
1322 static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr)
1323 {
1324  int i, ret;
1325 
1326  if ((ret = bytestream2_get_bytes_left(&ctx->gb)) < 560) {
1327  av_log(ctx->avctx, AV_LOG_ERROR, "Input frame too short (%d bytes).\n",
1328  ret);
1329  return AVERROR_INVALIDDATA;
1330  }
1331  bytestream2_skip(&ctx->gb, 8); // skip pad
1332 
1333  hdr->width = bytestream2_get_le32u(&ctx->gb);
1334  hdr->height = bytestream2_get_le32u(&ctx->gb);
1335 
1336  if (hdr->width != ctx->width || hdr->height != ctx->height) {
1337  avpriv_report_missing_feature(ctx->avctx, "Variable size frames");
1338  return AVERROR_PATCHWELCOME;
1339  }
1340 
1341  hdr->seq_num = bytestream2_get_le16u(&ctx->gb);
1342  hdr->codec = bytestream2_get_byteu(&ctx->gb);
1343  hdr->rotate_code = bytestream2_get_byteu(&ctx->gb);
1344 
1345  bytestream2_skip(&ctx->gb, 4); // skip pad
1346 
1347  for (i = 0; i < 4; i++)
1348  ctx->small_codebook[i] = bytestream2_get_le16u(&ctx->gb);
1349  hdr->bg_color = bytestream2_get_le16u(&ctx->gb);
1350 
1351  bytestream2_skip(&ctx->gb, 2); // skip pad
1352 
1353  hdr->rle_output_size = bytestream2_get_le32u(&ctx->gb);
1354  for (i = 0; i < 256; i++)
1355  ctx->codebook[i] = bytestream2_get_le16u(&ctx->gb);
1356 
1357  bytestream2_skip(&ctx->gb, 8); // skip pad
1358 
1359  return 0;
1360 }
1361 
1362 static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color)
1363 {
1364  while (buf_size--)
1365  *pbuf++ = color;
1366 }
1367 
1368 static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr)
1369 {
1370  uint8_t *dst;
1371  const uint8_t *src = (uint8_t*) ctx->frm0;
1372  int ret, dstpitch, height = ctx->height;
1373  int srcpitch = ctx->pitch * (hdr ? sizeof(ctx->frm0[0]) : 1);
1374 
1375  if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0)
1376  return ret;
1377 
1378  dst = ctx->frame->data[0];
1379  dstpitch = ctx->frame->linesize[0];
1380 
1381  while (height--) {
1382  memcpy(dst, src, srcpitch);
1383  src += srcpitch;
1384  dst += dstpitch;
1385  }
1386 
1387  return 0;
1388 }
1389 
1390 static int decode_frame(AVCodecContext *avctx, void *data,
1391  int *got_frame_ptr, AVPacket *pkt)
1392 {
1393  SANMVideoContext *ctx = avctx->priv_data;
1394  int i, ret;
1395 
1396  ctx->frame = data;
1397  bytestream2_init(&ctx->gb, pkt->data, pkt->size);
1398 
1399  if (!ctx->version) {
1400  int to_store = 0;
1401 
1402  while (bytestream2_get_bytes_left(&ctx->gb) >= 8) {
1403  uint32_t sig, size;
1404  int pos;
1405 
1406  sig = bytestream2_get_be32u(&ctx->gb);
1407  size = bytestream2_get_be32u(&ctx->gb);
1408  pos = bytestream2_tell(&ctx->gb);
1409 
1410  if (bytestream2_get_bytes_left(&ctx->gb) < size) {
1411  av_log(avctx, AV_LOG_ERROR, "Incorrect chunk size %"PRIu32".\n", size);
1412  break;
1413  }
1414  switch (sig) {
1415  case MKBETAG('N', 'P', 'A', 'L'):
1416  if (size != PALETTE_SIZE * 3) {
1417  av_log(avctx, AV_LOG_ERROR,
1418  "Incorrect palette block size %"PRIu32".\n", size);
1419  return AVERROR_INVALIDDATA;
1420  }
1421  for (i = 0; i < PALETTE_SIZE; i++)
1422  ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
1423  break;
1424  case MKBETAG('F', 'O', 'B', 'J'):
1425  if (size < 16)
1426  return AVERROR_INVALIDDATA;
1427  if (ret = process_frame_obj(ctx))
1428  return ret;
1429  break;
1430  case MKBETAG('X', 'P', 'A', 'L'):
1431  if (size == 6 || size == 4) {
1432  uint8_t tmp[3];
1433  int j;
1434 
1435  for (i = 0; i < PALETTE_SIZE; i++) {
1436  for (j = 0; j < 3; j++) {
1437  int t = (ctx->pal[i] >> (16 - j * 8)) & 0xFF;
1438  tmp[j] = av_clip_uint8((t * 129 + ctx->delta_pal[i * 3 + j]) >> 7);
1439  }
1440  ctx->pal[i] = 0xFFU << 24 | AV_RB24(tmp);
1441  }
1442  } else {
1443  if (size < PALETTE_DELTA * 2 + 4) {
1444  av_log(avctx, AV_LOG_ERROR,
1445  "Incorrect palette change block size %"PRIu32".\n",
1446  size);
1447  return AVERROR_INVALIDDATA;
1448  }
1449  bytestream2_skipu(&ctx->gb, 4);
1450  for (i = 0; i < PALETTE_DELTA; i++)
1451  ctx->delta_pal[i] = bytestream2_get_le16u(&ctx->gb);
1452  if (size >= PALETTE_DELTA * 5 + 4) {
1453  for (i = 0; i < PALETTE_SIZE; i++)
1454  ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
1455  } else {
1456  memset(ctx->pal, 0, sizeof(ctx->pal));
1457  }
1458  }
1459  break;
1460  case MKBETAG('S', 'T', 'O', 'R'):
1461  to_store = 1;
1462  break;
1463  case MKBETAG('F', 'T', 'C', 'H'):
1464  memcpy(ctx->frm0, ctx->stored_frame, ctx->buf_size);
1465  break;
1466  default:
1467  bytestream2_skip(&ctx->gb, size);
1468  av_log(avctx, AV_LOG_DEBUG,
1469  "Unknown/unsupported chunk %"PRIx32".\n", sig);
1470  break;
1471  }
1472 
1473  bytestream2_seek(&ctx->gb, pos + size, SEEK_SET);
1474  if (size & 1)
1475  bytestream2_skip(&ctx->gb, 1);
1476  }
1477  if (to_store)
1478  memcpy(ctx->stored_frame, ctx->frm0, ctx->buf_size);
1479  if ((ret = copy_output(ctx, NULL)))
1480  return ret;
1481  memcpy(ctx->frame->data[1], ctx->pal, 1024);
1482  } else {
1483  SANMFrameHeader header;
1484 
1485  if ((ret = read_frame_header(ctx, &header)))
1486  return ret;
1487 
1488  ctx->rotate_code = header.rotate_code;
1489  if ((ctx->frame->key_frame = !header.seq_num)) {
1490  ctx->frame->pict_type = AV_PICTURE_TYPE_I;
1491  fill_frame(ctx->frm1, ctx->npixels, header.bg_color);
1492  fill_frame(ctx->frm2, ctx->npixels, header.bg_color);
1493  } else {
1494  ctx->frame->pict_type = AV_PICTURE_TYPE_P;
1495  }
1496 
1497  if (header.codec < FF_ARRAY_ELEMS(v1_decoders)) {
1498  if ((ret = v1_decoders[header.codec](ctx))) {
1499  av_log(avctx, AV_LOG_ERROR,
1500  "Subcodec %d: error decoding frame.\n", header.codec);
1501  return ret;
1502  }
1503  } else {
1504  avpriv_request_sample(avctx, "Subcodec %d", header.codec);
1505  return AVERROR_PATCHWELCOME;
1506  }
1507 
1508  if ((ret = copy_output(ctx, &header)))
1509  return ret;
1510  }
1511  if (ctx->rotate_code)
1512  rotate_bufs(ctx, ctx->rotate_code);
1513 
1514  *got_frame_ptr = 1;
1515 
1516  return pkt->size;
1517 }
1518 
1519 AVCodec ff_sanm_decoder = {
1520  .name = "sanm",
1521  .long_name = NULL_IF_CONFIG_SMALL("LucasArts SANM/Smush video"),
1522  .type = AVMEDIA_TYPE_VIDEO,
1523  .id = AV_CODEC_ID_SANM,
1524  .priv_data_size = sizeof(SANMVideoContext),
1525  .init = decode_init,
1526  .close = decode_end,
1527  .decode = decode_frame,
1528  .capabilities = AV_CODEC_CAP_DR1,
1529 };
DIR_DOWN
Definition: sanm.c:315
NULL
#define NULL
Definition: coverity.c:32
val
const char const char void * val
Definition: avisynth_c.h:634
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
process_frame_obj
static int process_frame_obj(SANMVideoContext *ctx)
Definition: sanm.c:950
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
read_frame_header
static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr)
Definition: sanm.c:1322
SANMVideoContext::p4x4glyphs
int8_t p4x4glyphs[NGLYPHS][16]
Definition: sanm.c:292
h
h
Definition: vp9dsp_template.c:2093
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
SANMVideoContext::aligned_height
int aligned_height
Definition: sanm.c:273
imgutils.h
misc image utilities
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
fill_frame
static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color)
Definition: sanm.c:1362
ff_set_dimensions
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:216
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
copy_block16
static void copy_block16(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)
Definition: copy_block.h:68
SANMVideoContext::pal
uint32_t pal[PALETTE_SIZE]
Definition: sanm.c:268
AVPacket::size
int size
Definition: avcodec.h:1424
opcode_0xf8
static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
Definition: sanm.c:1102
decode_frame
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *pkt)
Definition: sanm.c:1390
SANMVideoContext::stored_frame
uint8_t * stored_frame
Definition: sanm.c:278
av_bswap16
#define av_bswap16
Definition: bswap.h:31
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1722
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
GlyphEdge
GlyphEdge
Definition: sanm.c:303
av_fast_padded_malloc
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:126
which_edge
static enum GlyphEdge which_edge(int x, int y, int edge_size)
Return enum GlyphEdge of box where point (x, y) lies.
Definition: sanm.c:326
DIR_LEFT
Definition: sanm.c:312
NO_EDGE
Definition: sanm.c:308
glyph4_x
static const int8_t glyph4_x[GLYPH_COORD_VECT_SIZE]
Definition: sanm.c:37
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
SANMFrameHeader::width
uint32_t width
Definition: sanm.c:300
SANMVideoContext::frm0
uint16_t * frm0
Definition: sanm.c:277
AVCodec
AVCodec.
Definition: avcodec.h:3472
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
glyph8_y
static const int8_t glyph8_y[GLYPH_COORD_VECT_SIZE]
Definition: sanm.c:49
bytestream2_get_bufferu
static av_always_inline unsigned int bytestream2_get_bufferu(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:273
FFALIGN
#define FFALIGN(x, a)
Definition: common.h:86
NO_DIR
Definition: sanm.c:316
run_len
static const uint8_t run_len[7][16]
Definition: h264_cavlc.c:219
SANMFrameHeader::rotate_code
int rotate_code
Definition: sanm.c:297
avpriv_request_sample
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
draw_glyph
static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index, uint16_t fg_color, uint16_t bg_color, int block_size, int pitch)
Definition: sanm.c:1046
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:74
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: sanm.c:488
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
AV_PIX_FMT_PAL8
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:74
color
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
good_mvec
static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my, int block_size)
Definition: sanm.c:1130
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
SANMFrameHeader::bg_color
uint16_t bg_color
Definition: sanm.c:299
codec37_mv
static void codec37_mv(uint8_t *dst, const uint8_t *src, int height, int stride, int x, int y)
Definition: sanm.c:604
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1617
SANMVideoContext::frame
AVFrame * frame
Definition: sanm.c:276
glyph4_y
static const int8_t glyph4_y[GLYPH_COORD_VECT_SIZE]
Definition: sanm.c:41
AVPacket::data
uint8_t * data
Definition: avcodec.h:1423
bytestream2_skipu
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
Definition: bytestream.h:170
SANMVideoContext::gb
GetByteContext gb
Definition: sanm.c:265
motion_vectors
static const int8_t motion_vectors[256][2]
Definition: sanm.c:53
size
ptrdiff_t size
Definition: opengl_enc.c:101
header
static const uint8_t header[24]
Definition: sdr2.c:67
decode_5
static int decode_5(SANMVideoContext *ctx)
Definition: sanm.c:1255
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
SANMVideoContext::small_codebook
uint16_t small_codebook[4]
Definition: sanm.c:290
flag
int flag
Definition: checkasm.c:76
U
#define U(x)
Definition: vp56_arith.h:37
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
SANMFrameHeader::height
uint32_t height
Definition: sanm.c:300
decode_end
static av_cold int decode_end(AVCodecContext *avctx)
Definition: sanm.c:522
AVERROR
#define AVERROR(e)
Definition: error.h:43
bytestream2_skip
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
rle_decode
static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size)
Definition: sanm.c:531
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
bytestream2_get_buffer
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
SANMFrameHeader::rle_output_size
int rle_output_size
Definition: sanm.c:297
SANMVideoContext::subversion
int subversion
Definition: sanm.c:267
bytestream2_get_bytes_left
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
SANMVideoContext::frm1
uint16_t * frm1
Definition: sanm.c:277
SANMVideoContext::npixels
long npixels
Definition: sanm.c:287
SANMVideoContext::avctx
AVCodecContext * avctx
Definition: sanm.c:264
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
decode_3
static int decode_3(SANMVideoContext *ctx)
Definition: sanm.c:1243
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3479
which_direction
static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1)
Definition: sanm.c:342
make_glyphs
static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec, const int side_length)
Construct glyphs by iterating through vector coordinates.
Definition: sanm.c:385
SANMVideoContext::frm1_size
uint32_t frm1_size
Definition: sanm.c:279
FFMAX
#define FFMAX(a, b)
Definition: common.h:79
avcodec.h
Libavcodec external API header.
SANMVideoContext::stored_frame_size
uint32_t stored_frame_size
Definition: sanm.c:280
SANMVideoContext::frm2_size
uint32_t frm2_size
Definition: sanm.c:279
SANMVideoContext::aligned_width
int aligned_width
Definition: sanm.c:273
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:266
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
GlyphDir
GlyphDir
Definition: sanm.c:311
PALETTE_DELTA
#define PALETTE_DELTA
Definition: sanm.c:35
y
float y
Definition: avf_showspectrum.c:96
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1681
destroy_buffers
static void destroy_buffers(SANMVideoContext *ctx)
Definition: sanm.c:450
interp_point
static void interp_point(int8_t *points, int x0, int y0, int x1, int y1, int pos, int npoints)
Definition: sanm.c:365
copy_block
static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, int pitch)
Definition: sanm.c:1017
old_codec47
static int old_codec47(SANMVideoContext *ctx, int top, int left, int width, int height)
Definition: sanm.c:859
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:68
SANMFrameHeader::seq_num
int seq_num
Definition: sanm.c:297
copy_output
static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr)
Definition: sanm.c:1368
TOP_EDGE
Definition: sanm.c:305
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
init_buffers
static av_cold int init_buffers(SANMVideoContext *ctx)
Definition: sanm.c:463
bytestream2_tell
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
c37_mv
static const int8_t c37_mv[]
Definition: sanm.c:107
src
AVS_Value src
Definition: avisynth_c.h:482
GLYPH_COORD_VECT_SIZE
#define GLYPH_COORD_VECT_SIZE
Definition: sanm.c:33
copy_block.h
decode_nop
static int decode_nop(SANMVideoContext *ctx)
Definition: sanm.c:1011
AV_RB24
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:87
decode_6
static int decode_6(SANMVideoContext *ctx)
Definition: sanm.c:1278
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
AVCodecContext
main external API structure.
Definition: avcodec.h:1502
codec2subblock
static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size)
Definition: sanm.c:1146
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:1040
process_block
static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1, uint8_t *prev2, int stride, int tbl, int size)
Definition: sanm.c:769
opcode_0xf7
static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
Definition: sanm.c:1068
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1618
decode_2
static int decode_2(SANMVideoContext *ctx)
Definition: sanm.c:1231
height
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
NGLYPHS
#define NGLYPHS
Definition: sanm.c:32
index
int index
Definition: gxfenc.c:89
bswap.h
byte swapping routines
decode_8
static int decode_8(SANMVideoContext *ctx)
Definition: sanm.c:1293
decode_0
static int decode_0(SANMVideoContext *ctx)
Definition: sanm.c:994
SANMVideoContext::frm2
uint16_t * frm2
Definition: sanm.c:277
AV_CODEC_ID_SANM
Definition: avcodec.h:313
rotate_bufs
static void rotate_bufs(SANMVideoContext *ctx, int rotate_code)
Definition: sanm.c:481
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
v1_decoders
static const frm_decoder v1_decoders[]
Definition: sanm.c:1317
DIR_UP
Definition: sanm.c:313
flags
static int flags
Definition: cpu.c:47
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
fill_block
static void fill_block(uint16_t *pdest, uint16_t color, int block_size, int pitch)
Definition: sanm.c:1036
PALETTE_SIZE
#define PALETTE_SIZE
Definition: sanm.c:34
SANMVideoContext::rle_buf_size
unsigned int rle_buf_size
Definition: sanm.c:283
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:523
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
av_fast_malloc
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:499
old_codec37
static int old_codec37(SANMVideoContext *ctx, int top, int left, int width, int height)
Definition: sanm.c:623
SANMVideoContext::codebook
uint16_t codebook[256]
Definition: sanm.c:289
internal.h
common internal api header.
if
if(ret< 0)
Definition: vf_mcdeint.c:280
init_sizes
static void init_sizes(SANMVideoContext *ctx, int width, int height)
Definition: sanm.c:437
SANMVideoContext::buf_size
long buf_size
Definition: sanm.c:287
MKBETAG
#define MKBETAG(a, b, c, d)
Definition: common.h:331
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1544
glyph8_x
static const int8_t glyph8_x[GLYPH_COORD_VECT_SIZE]
Definition: sanm.c:45
decode_4
static int decode_4(SANMVideoContext *ctx)
Definition: sanm.c:1249
SANMVideoContext::delta_pal
int16_t delta_pal[PALETTE_DELTA]
Definition: sanm.c:269
len
int len
Definition: vorbis_enc_data.h:452
copy_block4
static void copy_block4(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)
Definition: copy_block.h:37
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
bytestream2_seek
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
Definition: bytestream.h:208
copy_block8
static void copy_block8(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)
Definition: copy_block.h:47
ff_sanm_decoder
AVCodec ff_sanm_decoder
Definition: sanm.c:1519
AV_PIX_FMT_RGB565
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:367
SANMVideoContext::prev_seq
int prev_seq
Definition: sanm.c:274
old_codec1
static int old_codec1(SANMVideoContext *ctx, int top, int left, int width, int height)
Definition: sanm.c:557
SANMVideoContext::rotate_code
int rotate_code
Definition: sanm.c:285
SANMVideoContext::p8x8glyphs
int8_t p8x8glyphs[NGLYPHS][64]
Definition: sanm.c:293
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
SANMVideoContext::frm0_size
uint32_t frm0_size
Definition: sanm.c:279
FFSWAP
#define FFSWAP(type, a, b)
Definition: common.h:84
stride
#define stride
SANMVideoContext::rle_buf
uint8_t * rle_buf
Definition: sanm.c:282
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1400
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:857
AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:267
frm_decoder
int(* frm_decoder)(SANMVideoContext *ctx)
Definition: sanm.c:1315
width
static int width
Definition: demuxing_decoding.c:39
Generated on Thu Sep 10 2015 11:39:01 for FFmpeg by   doxygen 1.8.6