| 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 | } |
| 461 | |
| 462 | static av_cold int init_buffers(SANMVideoContext *ctx) |
| 463 | { |
| 464 | av_fast_padded_malloc(&ctx->frm0, &ctx->frm0_size, ctx->buf_size); |
| 465 | av_fast_padded_malloc(&ctx->frm1, &ctx->frm1_size, ctx->buf_size); |
| 466 | av_fast_padded_malloc(&ctx->frm2, &ctx->frm2_size, ctx->buf_size); |
| 467 | if (!ctx->version) |
| 468 | av_fast_padded_malloc(&ctx->stored_frame, |
| 469 | &ctx->stored_frame_size, ctx->buf_size); |
| 470 | |
| 471 | if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 || |
| 472 | (!ctx->stored_frame && !ctx->version)) { |
| 473 | destroy_buffers(ctx); |
| 474 | return AVERROR(ENOMEM); |
| 475 | } |
| 476 | |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static void rotate_bufs(SANMVideoContext *ctx, int rotate_code) |
| 481 | { |
| 482 | if (rotate_code == 2) |
| 483 | FFSWAP(uint16_t*, ctx->frm1, ctx->frm2); |
| 484 | FFSWAP(uint16_t*, ctx->frm2, ctx->frm0); |
| 485 | } |
| 486 | |
| 487 | static av_cold int decode_init(AVCodecContext *avctx) |
| 488 | { |
| 489 | SANMVideoContext *ctx = avctx->priv_data; |
| 490 | |
| 491 | ctx->avctx = avctx; |
| 492 | ctx->version = !avctx->extradata_size; |
| 493 | |
| 494 | avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8; |
| 495 | |
| 496 | init_sizes(ctx, avctx->width, avctx->height); |
| 497 | if (init_buffers(ctx)) { |
| 498 | av_log(avctx, AV_LOG_ERROR, "Error allocating buffers.\n"); |
| 499 | return AVERROR(ENOMEM); |
| 500 | } |
| 501 | |
| 502 | make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4); |
| 503 | make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8); |
| 504 | |
| 505 | if (!ctx->version) { |
| 506 | int i; |
| 507 | |
| 508 | if (avctx->extradata_size < 1026) { |
| 509 | av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n"); |
| 510 | return AVERROR_INVALIDDATA; |
| 511 | } |
| 512 | |
| 513 | ctx->subversion = AV_RL16(avctx->extradata); |
| 514 | for (i = 0; i < PALETTE_SIZE; i++) |
| 515 | ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4); |
| 516 | } |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | static av_cold int decode_end(AVCodecContext *avctx) |
| 522 | { |
| 523 | SANMVideoContext *ctx = avctx->priv_data; |
| 524 | |
| 525 | destroy_buffers(ctx); |
| 526 | |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size) |
| 531 | { |
| 532 | int opcode, color, run_len, left = out_size; |
| 533 | |
| 534 | while (left > 0) { |
| 535 | opcode = bytestream2_get_byte(&ctx->gb); |
| 536 | run_len = (opcode >> 1) + 1; |
| 537 | if (run_len > left || bytestream2_get_bytes_left(&ctx->gb) <= 0) |
| 538 | return AVERROR_INVALIDDATA; |
| 539 | |
| 540 | if (opcode & 1) { |
| 541 | color = bytestream2_get_byte(&ctx->gb); |
| 542 | memset(dst, color, run_len); |
| 543 | } else { |
| 544 | if (bytestream2_get_bytes_left(&ctx->gb) < run_len) |
| 545 | return AVERROR_INVALIDDATA; |
| 546 | bytestream2_get_bufferu(&ctx->gb, dst, run_len); |
| 547 | } |
| 548 | |
| 549 | dst += run_len; |
| 550 | left -= run_len; |
| 551 | } |
| 552 | |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | static int old_codec1(SANMVideoContext *ctx, int top, |
| 557 | int left, int width, int height) |
| 558 | { |
| 559 | uint8_t *dst = ((uint8_t *)ctx->frm0) + left + top * ctx->pitch; |
| 560 | int i, j, len, flag, code, val, pos, end; |
| 561 | |
| 562 | for (i = 0; i < height; i++) { |
| 563 | pos = 0; |
| 564 | |
| 565 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
| 566 | return AVERROR_INVALIDDATA; |
| 567 | |
| 568 | len = bytestream2_get_le16u(&ctx->gb); |
| 569 | end = bytestream2_tell(&ctx->gb) + len; |
| 570 | |
| 571 | while (bytestream2_tell(&ctx->gb) < end) { |
| 572 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
| 573 | return AVERROR_INVALIDDATA; |
| 574 | |
| 575 | code = bytestream2_get_byteu(&ctx->gb); |
| 576 | flag = code & 1; |
| 577 | code = (code >> 1) + 1; |
| 578 | if (pos + code > width) |
| 579 | return AVERROR_INVALIDDATA; |
| 580 | if (flag) { |
| 581 | val = bytestream2_get_byteu(&ctx->gb); |
| 582 | if (val) |
| 583 | memset(dst + pos, val, code); |
| 584 | pos += code; |
| 585 | } else { |
| 586 | if (bytestream2_get_bytes_left(&ctx->gb) < code) |
| 587 | return AVERROR_INVALIDDATA; |
| 588 | for (j = 0; j < code; j++) { |
| 589 | val = bytestream2_get_byteu(&ctx->gb); |
| 590 | if (val) |
| 591 | dst[pos] = val; |
| 592 | pos++; |
| 593 | } |
| 594 | } |
| 595 | } |
| 596 | dst += ctx->pitch; |
| 597 | } |
| 598 | ctx->rotate_code = 0; |
| 599 | |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | static inline void codec37_mv(uint8_t *dst, const uint8_t *src, |
| 604 | int height, int stride, int x, int y) |
| 605 | { |
| 606 | int pos, i, j; |
| 607 | |
| 608 | pos = x + y * stride; |
| 609 | for (j = 0; j < 4; j++) { |
| 610 | for (i = 0; i < 4; i++) { |
| 611 | if ((pos + i) < 0 || (pos + i) >= height * stride) |
| 612 | dst[i] = 0; |
| 613 | else |
| 614 | dst[i] = src[i]; |
| 615 | } |
| 616 | dst += stride; |
| 617 | src += stride; |
| 618 | pos += stride; |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | static int old_codec37(SANMVideoContext *ctx, int top, |
| 623 | int left, int width, int height) |
| 624 | { |
| 625 | int stride = ctx->pitch; |
| 626 | int i, j, k, t; |
| 627 | uint8_t *dst, *prev; |
| 628 | int skip_run = 0; |
| 629 | int compr = bytestream2_get_byte(&ctx->gb); |
| 630 | int mvoff = bytestream2_get_byte(&ctx->gb); |
| 631 | int seq = bytestream2_get_le16(&ctx->gb); |
| 632 | uint32_t decoded_size = bytestream2_get_le32(&ctx->gb); |
| 633 | int flags; |
| 634 | |
| 635 | bytestream2_skip(&ctx->gb, 4); |
| 636 | flags = bytestream2_get_byte(&ctx->gb); |
| 637 | bytestream2_skip(&ctx->gb, 3); |
| 638 | |
| 639 | if (decoded_size > ctx->height * stride - left - top * stride) { |
| 640 | decoded_size = ctx->height * stride - left - top * stride; |
| 641 | av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); |
| 642 | } |
| 643 | |
| 644 | ctx->rotate_code = 0; |
| 645 | |
| 646 | if (((seq & 1) || !(flags & 1)) && (compr && compr != 2)) |
| 647 | rotate_bufs(ctx, 1); |
| 648 | |
| 649 | dst = ((uint8_t*)ctx->frm0) + left + top * stride; |
| 650 | prev = ((uint8_t*)ctx->frm2) + left + top * stride; |
| 651 | |
| 652 | if (mvoff > 2) { |
| 653 | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvoff); |
| 654 | return AVERROR_INVALIDDATA; |
| 655 | } |
| 656 | |
| 657 | switch (compr) { |
| 658 | case 0: |
| 659 | for (i = 0; i < height; i++) { |
| 660 | bytestream2_get_buffer(&ctx->gb, dst, width); |
| 661 | dst += stride; |
| 662 | } |
| 663 | memset(ctx->frm1, 0, ctx->height * stride); |
| 664 | memset(ctx->frm2, 0, ctx->height * stride); |
| 665 | break; |
| 666 | case 2: |
| 667 | if (rle_decode(ctx, dst, decoded_size)) |
| 668 | return AVERROR_INVALIDDATA; |
| 669 | memset(ctx->frm1, 0, ctx->frm1_size); |
| 670 | memset(ctx->frm2, 0, ctx->frm2_size); |
| 671 | break; |
| 672 | case 3: |
| 673 | case 4: |
| 674 | if (flags & 4) { |
| 675 | for (j = 0; j < height; j += 4) { |
| 676 | for (i = 0; i < width; i += 4) { |
| 677 | int code; |
| 678 | if (skip_run) { |
| 679 | skip_run--; |
| 680 | copy_block4(dst + i, prev + i, stride, stride, 4); |
| 681 | continue; |
| 682 | } |
| 683 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| 684 | return AVERROR_INVALIDDATA; |
| 685 | code = bytestream2_get_byteu(&ctx->gb); |
| 686 | switch (code) { |
| 687 | case 0xFF: |
| 688 | if (bytestream2_get_bytes_left(&ctx->gb) < 16) |
| 689 | return AVERROR_INVALIDDATA; |
| 690 | for (k = 0; k < 4; k++) |
| 691 | bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4); |
| 692 | break; |
| 693 | case 0xFE: |
| 694 | if (bytestream2_get_bytes_left(&ctx->gb) < 4) |
| 695 | return AVERROR_INVALIDDATA; |
| 696 | for (k = 0; k < 4; k++) |
| 697 | memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4); |
| 698 | break; |
| 699 | case 0xFD: |
| 700 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| 701 | return AVERROR_INVALIDDATA; |
| 702 | t = bytestream2_get_byteu(&ctx->gb); |
| 703 | for (k = 0; k < 4; k++) |
| 704 | memset(dst + i + k * stride, t, 4); |
| 705 | break; |
| 706 | default: |
| 707 | if (compr == 4 && !code) { |
| 708 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| 709 | return AVERROR_INVALIDDATA; |
| 710 | skip_run = bytestream2_get_byteu(&ctx->gb) + 1; |
| 711 | i -= 4; |
| 712 | } else { |
| 713 | int mx, my; |
| 714 | |
| 715 | mx = c37_mv[(mvoff * 255 + code) * 2]; |
| 716 | my = c37_mv[(mvoff * 255 + code) * 2 + 1]; |
| 717 | codec37_mv(dst + i, prev + i + mx + my * stride, |
| 718 | ctx->height, stride, i + mx, j + my); |
| 719 | } |
| 720 | } |
| 721 | } |
| 722 | dst += stride * 4; |
| 723 | prev += stride * 4; |
| 724 | } |
| 725 | } else { |
| 726 | for (j = 0; j < height; j += 4) { |
| 727 | for (i = 0; i < width; i += 4) { |
| 728 | int code; |
| 729 | if (skip_run) { |
| 730 | skip_run--; |
| 731 | copy_block4(dst + i, prev + i, stride, stride, 4); |
| 732 | continue; |
| 733 | } |
| 734 | code = bytestream2_get_byte(&ctx->gb); |
| 735 | if (code == 0xFF) { |
| 736 | if (bytestream2_get_bytes_left(&ctx->gb) < 16) |
| 737 | return AVERROR_INVALIDDATA; |
| 738 | for (k = 0; k < 4; k++) |
| 739 | bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4); |
| 740 | } else if (compr == 4 && !code) { |
| 741 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| 742 | return AVERROR_INVALIDDATA; |
| 743 | skip_run = bytestream2_get_byteu(&ctx->gb) + 1; |
| 744 | i -= 4; |
| 745 | } else { |
| 746 | int mx, my; |
| 747 | |
| 748 | mx = c37_mv[(mvoff * 255 + code) * 2]; |
| 749 | my = c37_mv[(mvoff * 255 + code) * 2 + 1]; |
| 750 | codec37_mv(dst + i, prev + i + mx + my * stride, |
| 751 | ctx->height, stride, i + mx, j + my); |
| 752 | } |
| 753 | } |
| 754 | dst += stride * 4; |
| 755 | prev += stride * 4; |
| 756 | } |
| 757 | } |
| 758 | break; |
| 759 | default: |
| 760 | avpriv_report_missing_feature(ctx->avctx, |
| 761 | "Subcodec 37 compression %d", compr); |
| 762 | return AVERROR_PATCHWELCOME; |
| 763 | } |
| 764 | |
| 765 | return 0; |
| 766 | } |
| 767 | |
| 768 | static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1, |
| 769 | uint8_t *prev2, int stride, int tbl, int size) |
| 770 | { |
| 771 | int code, k, t; |
| 772 | uint8_t colors[2]; |
| 773 | int8_t *pglyph; |
| 774 | |
| 775 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| 776 | return AVERROR_INVALIDDATA; |
| 777 | |
| 778 | code = bytestream2_get_byteu(&ctx->gb); |
| 779 | if (code >= 0xF8) { |
| 780 | switch (code) { |
| 781 | case 0xFF: |
| 782 | if (size == 2) { |
| 783 | if (bytestream2_get_bytes_left(&ctx->gb) < 4) |
| 784 | return AVERROR_INVALIDDATA; |
| 785 | dst[0] = bytestream2_get_byteu(&ctx->gb); |
| 786 | dst[1] = bytestream2_get_byteu(&ctx->gb); |
| 787 | dst[0 + stride] = bytestream2_get_byteu(&ctx->gb); |
| 788 | dst[1 + stride] = bytestream2_get_byteu(&ctx->gb); |
| 789 | } else { |
| 790 | size >>= 1; |
| 791 | if (process_block(ctx, dst, prev1, prev2, stride, tbl, size)) |
| 792 | return AVERROR_INVALIDDATA; |
| 793 | if (process_block(ctx, dst + size, prev1 + size, prev2 + size, |
| 794 | stride, tbl, size)) |
| 795 | return AVERROR_INVALIDDATA; |
| 796 | dst += size * stride; |
| 797 | prev1 += size * stride; |
| 798 | prev2 += size * stride; |
| 799 | if (process_block(ctx, dst, prev1, prev2, stride, tbl, size)) |
| 800 | return AVERROR_INVALIDDATA; |
| 801 | if (process_block(ctx, dst + size, prev1 + size, prev2 + size, |
| 802 | stride, tbl, size)) |
| 803 | return AVERROR_INVALIDDATA; |
| 804 | } |
| 805 | break; |
| 806 | case 0xFE: |
| 807 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| 808 | return AVERROR_INVALIDDATA; |
| 809 | |
| 810 | t = bytestream2_get_byteu(&ctx->gb); |
| 811 | for (k = 0; k < size; k++) |
| 812 | memset(dst + k * stride, t, size); |
| 813 | break; |
| 814 | case 0xFD: |
| 815 | if (bytestream2_get_bytes_left(&ctx->gb) < 3) |
| 816 | return AVERROR_INVALIDDATA; |
| 817 | |
| 818 | code = bytestream2_get_byteu(&ctx->gb); |
| 819 | pglyph = (size == 8) ? ctx->p8x8glyphs[code] : ctx->p4x4glyphs[code]; |
| 820 | bytestream2_get_bufferu(&ctx->gb, colors, 2); |
| 821 | |
| 822 | for (k = 0; k < size; k++) |
| 823 | for (t = 0; t < size; t++) |
| 824 | dst[t + k * stride] = colors[!*pglyph++]; |
| 825 | break; |
| 826 | case 0xFC: |
| 827 | for (k = 0; k < size; k++) |
| 828 | memcpy(dst + k * stride, prev1 + k * stride, size); |
| 829 | break; |
| 830 | default: |
| 831 | k = bytestream2_tell(&ctx->gb); |
| 832 | bytestream2_seek(&ctx->gb, tbl + (code & 7), SEEK_SET); |
| 833 | t = bytestream2_get_byte(&ctx->gb); |
| 834 | bytestream2_seek(&ctx->gb, k, SEEK_SET); |
| 835 | for (k = 0; k < size; k++) |
| 836 | memset(dst + k * stride, t, size); |
| 837 | } |
| 838 | } else { |
| 839 | int mx = motion_vectors[code][0]; |
| 840 | int my = motion_vectors[code][1]; |
| 841 | int index = prev2 - (const uint8_t *)ctx->frm2; |
| 842 | |
| 843 | av_assert2(index >= 0 && index < (ctx->buf_size >> 1)); |
| 844 | |
| 845 | if (index < -mx - my * stride || |
| 846 | (ctx->buf_size >> 1) - index < mx + size + (my + size - 1) * stride) { |
| 847 | av_log(ctx->avctx, AV_LOG_ERROR, "MV is invalid.\n"); |
| 848 | return AVERROR_INVALIDDATA; |
| 849 | } |
| 850 | |
| 851 | for (k = 0; k < size; k++) |
| 852 | memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size); |
| 853 | } |
| 854 | |
| 855 | return 0; |
| 856 | } |
| 857 | |
| 858 | static int old_codec47(SANMVideoContext *ctx, int top, |
| 859 | int left, int width, int height) |
| 860 | { |
| 861 | uint32_t decoded_size; |
| 862 | int i, j; |
| 863 | int stride = ctx->pitch; |
| 864 | uint8_t *dst = (uint8_t *)ctx->frm0 + left + top * stride; |
| 865 | uint8_t *prev1 = (uint8_t *)ctx->frm1; |
| 866 | uint8_t *prev2 = (uint8_t *)ctx->frm2; |
| 867 | int tbl_pos = bytestream2_tell(&ctx->gb); |
| 868 | int seq = bytestream2_get_le16(&ctx->gb); |
| 869 | int compr = bytestream2_get_byte(&ctx->gb); |
| 870 | int new_rot = bytestream2_get_byte(&ctx->gb); |
| 871 | int skip = bytestream2_get_byte(&ctx->gb); |
| 872 | |
| 873 | bytestream2_skip(&ctx->gb, 9); |
| 874 | decoded_size = bytestream2_get_le32(&ctx->gb); |
| 875 | bytestream2_skip(&ctx->gb, 8); |
| 876 | |
| 877 | if (decoded_size > ctx->height * stride - left - top * stride) { |
| 878 | decoded_size = ctx->height * stride - left - top * stride; |
| 879 | av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); |
| 880 | } |
| 881 | |
| 882 | if (skip & 1) |
| 883 | bytestream2_skip(&ctx->gb, 0x8080); |
| 884 | if (!seq) { |
| 885 | ctx->prev_seq = -1; |
| 886 | memset(prev1, 0, ctx->height * stride); |
| 887 | memset(prev2, 0, ctx->height * stride); |
| 888 | } |
| 889 | |
| 890 | switch (compr) { |
| 891 | case 0: |
| 892 | if (bytestream2_get_bytes_left(&ctx->gb) < width * height) |
| 893 | return AVERROR_INVALIDDATA; |
| 894 | for (j = 0; j < height; j++) { |
| 895 | bytestream2_get_bufferu(&ctx->gb, dst, width); |
| 896 | dst += stride; |
| 897 | } |
| 898 | break; |
| 899 | case 1: |
| 900 | if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1)) |
| 901 | return AVERROR_INVALIDDATA; |
| 902 | for (j = 0; j < height; j += 2) { |
| 903 | for (i = 0; i < width; i += 2) { |
| 904 | dst[i] = |
| 905 | dst[i + 1] = |
| 906 | dst[stride + i] = |
| 907 | dst[stride + i + 1] = bytestream2_get_byteu(&ctx->gb); |
| 908 | } |
| 909 | dst += stride * 2; |
| 910 | } |
| 911 | break; |
| 912 | case 2: |
| 913 | if (seq == ctx->prev_seq + 1) { |
| 914 | for (j = 0; j < height; j += 8) { |
| 915 | for (i = 0; i < width; i += 8) |
| 916 | if (process_block(ctx, dst + i, prev1 + i, prev2 + i, stride, |
| 917 | tbl_pos + 8, 8)) |
| 918 | return AVERROR_INVALIDDATA; |
| 919 | dst += stride * 8; |
| 920 | prev1 += stride * 8; |
| 921 | prev2 += stride * 8; |
| 922 | } |
| 923 | } |
| 924 | break; |
| 925 | case 3: |
| 926 | memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height); |
| 927 | break; |
| 928 | case 4: |
| 929 | memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height); |
| 930 | break; |
| 931 | case 5: |
| 932 | if (rle_decode(ctx, dst, decoded_size)) |
| 933 | return AVERROR_INVALIDDATA; |
| 934 | break; |
| 935 | default: |
| 936 | avpriv_report_missing_feature(ctx->avctx, |
| 937 | "Subcodec 47 compression %d", compr); |
| 938 | return AVERROR_PATCHWELCOME; |
| 939 | } |
| 940 | if (seq == ctx->prev_seq + 1) |
| 941 | ctx->rotate_code = new_rot; |
| 942 | else |
| 943 | ctx->rotate_code = 0; |
| 944 | ctx->prev_seq = seq; |
| 945 | |
| 946 | return 0; |
| 947 | } |
| 948 | |
| 949 | static int process_frame_obj(SANMVideoContext *ctx) |
| 950 | { |
| 951 | uint16_t codec = bytestream2_get_le16u(&ctx->gb); |
| 952 | uint16_t left = bytestream2_get_le16u(&ctx->gb); |
| 953 | uint16_t top = bytestream2_get_le16u(&ctx->gb); |
| 954 | uint16_t w = bytestream2_get_le16u(&ctx->gb); |
| 955 | uint16_t h = bytestream2_get_le16u(&ctx->gb); |
| 956 | |
| 957 | if (!w || !h) { |
| 958 | av_log(ctx->avctx, AV_LOG_ERROR, "Dimensions are invalid.\n"); |
| 959 | return AVERROR_INVALIDDATA; |
| 960 | } |
| 961 | |
| 962 | if (ctx->width < left + w || ctx->height < top + h) { |
| 963 | int ret = ff_set_dimensions(ctx->avctx, FFMAX(left + w, ctx->width), |
| 964 | FFMAX(top + h, ctx->height)); |
| 965 | if (ret < 0) |
| 966 | return ret; |
| 967 | init_sizes(ctx, FFMAX(left + w, ctx->width), |
| 968 | FFMAX(top + h, ctx->height)); |
| 969 | if (init_buffers(ctx)) { |
| 970 | av_log(ctx->avctx, AV_LOG_ERROR, "Error resizing buffers.\n"); |
| 971 | return AVERROR(ENOMEM); |
| 972 | } |
| 973 | } |
| 974 | bytestream2_skip(&ctx->gb, 4); |
| 975 | |
| 976 | switch (codec) { |
| 977 | case 1: |
| 978 | case 3: |
| 979 | return old_codec1(ctx, top, left, w, h); |
| 980 | break; |
| 981 | case 37: |
| 982 | return old_codec37(ctx, top, left, w, h); |
| 983 | break; |
| 984 | case 47: |
| 985 | return old_codec47(ctx, top, left, w, h); |
| 986 | break; |
| 987 | default: |
| 988 | avpriv_request_sample(ctx->avctx, "Subcodec %d", codec); |
| 989 | return AVERROR_PATCHWELCOME; |
| 990 | } |
| 991 | } |
| 992 | |
| 993 | static int decode_0(SANMVideoContext *ctx) |
| 994 | { |
| 995 | uint16_t *frm = ctx->frm0; |
| 996 | int x, y; |
| 997 | |
| 998 | if (bytestream2_get_bytes_left(&ctx->gb) < ctx->width * ctx->height * 2) { |
| 999 | av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for raw frame.\n"); |
| 1000 | return AVERROR_INVALIDDATA; |
| 1001 | } |
| 1002 | for (y = 0; y < ctx->height; y++) { |
| 1003 | for (x = 0; x < ctx->width; x++) |
| 1004 | frm[x] = bytestream2_get_le16u(&ctx->gb); |
| 1005 | frm += ctx->pitch; |
| 1006 | } |
| 1007 | return 0; |
| 1008 | } |
| 1009 | |
| 1010 | static int decode_nop(SANMVideoContext *ctx) |
| 1011 | { |
| 1012 | avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type"); |
| 1013 | return AVERROR_PATCHWELCOME; |
| 1014 | } |
| 1015 | |
| 1016 | static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, int pitch) |
| 1017 | { |
| 1018 | uint8_t *dst = (uint8_t *)pdest; |
| 1019 | uint8_t *src = (uint8_t *)psrc; |
| 1020 | int stride = pitch * 2; |
| 1021 | |
| 1022 | switch (block_size) { |
| 1023 | case 2: |
| 1024 | copy_block4(dst, src, stride, stride, 2); |
| 1025 | break; |
| 1026 | case 4: |
| 1027 | copy_block8(dst, src, stride, stride, 4); |
| 1028 | break; |
| 1029 | case 8: |
| 1030 | copy_block16(dst, src, stride, stride, 8); |
| 1031 | break; |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | static void fill_block(uint16_t *pdest, uint16_t color, int block_size, int pitch) |
| 1036 | { |
| 1037 | int x, y; |
| 1038 | |
| 1039 | pitch -= block_size; |
| 1040 | for (y = 0; y < block_size; y++, pdest += pitch) |
| 1041 | for (x = 0; x < block_size; x++) |
| 1042 | *pdest++ = color; |
| 1043 | } |
| 1044 | |
| 1045 | static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index, |
| 1046 | uint16_t fg_color, uint16_t bg_color, int block_size, |
| 1047 | int pitch) |
| 1048 | { |
| 1049 | int8_t *pglyph; |
| 1050 | uint16_t colors[2] = { fg_color, bg_color }; |
| 1051 | int x, y; |
| 1052 | |
| 1053 | if (index >= NGLYPHS) { |
| 1054 | av_log(ctx->avctx, AV_LOG_ERROR, "Ignoring nonexistent glyph #%u.\n", index); |
| 1055 | return AVERROR_INVALIDDATA; |
| 1056 | } |
| 1057 | |
| 1058 | pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index]; |
| 1059 | pitch -= block_size; |
| 1060 | |
| 1061 | for (y = 0; y < block_size; y++, dst += pitch) |
| 1062 | for (x = 0; x < block_size; x++) |
| 1063 | *dst++ = colors[*pglyph++]; |
| 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch) |
| 1068 | { |
| 1069 | uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch; |
| 1070 | |
| 1071 | if (block_size == 2) { |
| 1072 | uint32_t indices; |
| 1073 | |
| 1074 | if (bytestream2_get_bytes_left(&ctx->gb) < 4) |
| 1075 | return AVERROR_INVALIDDATA; |
| 1076 | |
| 1077 | indices = bytestream2_get_le32u(&ctx->gb); |
| 1078 | dst[0] = ctx->codebook[indices & 0xFF]; |
| 1079 | indices >>= 8; |
| 1080 | dst[1] = ctx->codebook[indices & 0xFF]; |
| 1081 | indices >>= 8; |
| 1082 | dst[pitch] = ctx->codebook[indices & 0xFF]; |
| 1083 | indices >>= 8; |
| 1084 | dst[pitch + 1] = ctx->codebook[indices & 0xFF]; |
| 1085 | } else { |
| 1086 | uint16_t fgcolor, bgcolor; |
| 1087 | int glyph; |
| 1088 | |
| 1089 | if (bytestream2_get_bytes_left(&ctx->gb) < 3) |
| 1090 | return AVERROR_INVALIDDATA; |
| 1091 | |
| 1092 | glyph = bytestream2_get_byteu(&ctx->gb); |
| 1093 | bgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; |
| 1094 | fgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; |
| 1095 | |
| 1096 | draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch); |
| 1097 | } |
| 1098 | return 0; |
| 1099 | } |
| 1100 | |
| 1101 | static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch) |
| 1102 | { |
| 1103 | uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch; |
| 1104 | |
| 1105 | if (block_size == 2) { |
| 1106 | if (bytestream2_get_bytes_left(&ctx->gb) < 8) |
| 1107 | return AVERROR_INVALIDDATA; |
| 1108 | |
| 1109 | dst[0] = bytestream2_get_le16u(&ctx->gb); |
| 1110 | dst[1] = bytestream2_get_le16u(&ctx->gb); |
| 1111 | dst[pitch] = bytestream2_get_le16u(&ctx->gb); |
| 1112 | dst[pitch + 1] = bytestream2_get_le16u(&ctx->gb); |
| 1113 | } else { |
| 1114 | uint16_t fgcolor, bgcolor; |
| 1115 | int glyph; |
| 1116 | |
| 1117 | if (bytestream2_get_bytes_left(&ctx->gb) < 5) |
| 1118 | return AVERROR_INVALIDDATA; |
| 1119 | |
| 1120 | glyph = bytestream2_get_byteu(&ctx->gb); |
| 1121 | bgcolor = bytestream2_get_le16u(&ctx->gb); |
| 1122 | fgcolor = bytestream2_get_le16u(&ctx->gb); |
| 1123 | |
| 1124 | draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch); |
| 1125 | } |
| 1126 | return 0; |
| 1127 | } |
| 1128 | |
| 1129 | static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my, |
| 1130 | int block_size) |
| 1131 | { |
| 1132 | int start_pos = cx + mx + (cy + my) * ctx->pitch; |
| 1133 | int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1); |
| 1134 | |
| 1135 | int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1); |
| 1136 | |
| 1137 | if (!good) |
| 1138 | av_log(ctx->avctx, AV_LOG_ERROR, |
| 1139 | "Ignoring invalid motion vector (%i, %i)->(%u, %u), block size = %u\n", |
| 1140 | cx + mx, cy + my, cx, cy, block_size); |
| 1141 | |
| 1142 | return good; |
| 1143 | } |
| 1144 | |
| 1145 | static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size) |
| 1146 | { |
| 1147 | int16_t mx, my, index; |
| 1148 | int opcode; |
| 1149 | |
| 1150 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| 1151 | return AVERROR_INVALIDDATA; |
| 1152 | |
| 1153 | opcode = bytestream2_get_byteu(&ctx->gb); |
| 1154 | |
| 1155 | switch (opcode) { |
| 1156 | default: |
| 1157 | mx = motion_vectors[opcode][0]; |
| 1158 | my = motion_vectors[opcode][1]; |
| 1159 | |
| 1160 | if (good_mvec(ctx, cx, cy, mx, my, blk_size)) { |
| 1161 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, |
| 1162 | ctx->frm2 + cx + mx + ctx->pitch * (cy + my), |
| 1163 | blk_size, ctx->pitch); |
| 1164 | } |
| 1165 | break; |
| 1166 | case 0xF5: |
| 1167 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
| 1168 | return AVERROR_INVALIDDATA; |
| 1169 | index = bytestream2_get_le16u(&ctx->gb); |
| 1170 | |
| 1171 | mx = index % ctx->width; |
| 1172 | my = index / ctx->width; |
| 1173 | |
| 1174 | if (good_mvec(ctx, cx, cy, mx, my, blk_size)) { |
| 1175 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, |
| 1176 | ctx->frm2 + cx + mx + ctx->pitch * (cy + my), |
| 1177 | blk_size, ctx->pitch); |
| 1178 | } |
| 1179 | break; |
| 1180 | case 0xF6: |
| 1181 | copy_block(ctx->frm0 + cx + ctx->pitch * cy, |
| 1182 | ctx->frm1 + cx + ctx->pitch * cy, |
| 1183 | blk_size, ctx->pitch); |
| 1184 | break; |
| 1185 | case 0xF7: |
| 1186 | opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch); |
| 1187 | break; |
| 1188 | |
| 1189 | case 0xF8: |
| 1190 | opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch); |
| 1191 | break; |
| 1192 | case 0xF9: |
| 1193 | case 0xFA: |
| 1194 | case 0xFB: |
| 1195 | case 0xFC: |
| 1196 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, |
| 1197 | ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch); |
| 1198 | break; |
| 1199 | case 0xFD: |
| 1200 | if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| 1201 | return AVERROR_INVALIDDATA; |
| 1202 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, |
| 1203 | ctx->codebook[bytestream2_get_byteu(&ctx->gb)], blk_size, ctx->pitch); |
| 1204 | break; |
| 1205 | case 0xFE: |
| 1206 | if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
| 1207 | return AVERROR_INVALIDDATA; |
| 1208 | fill_block(ctx->frm0 + cx + cy * ctx->pitch, |
| 1209 | bytestream2_get_le16u(&ctx->gb), blk_size, ctx->pitch); |
| 1210 | break; |
| 1211 | case 0xFF: |
| 1212 | if (blk_size == 2) { |
| 1213 | opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch); |
| 1214 | } else { |
| 1215 | blk_size >>= 1; |
| 1216 | if (codec2subblock(ctx, cx, cy, blk_size)) |
| 1217 | return AVERROR_INVALIDDATA; |
| 1218 | if (codec2subblock(ctx, cx + blk_size, cy, blk_size)) |
| 1219 | return AVERROR_INVALIDDATA; |
| 1220 | if (codec2subblock(ctx, cx, cy + blk_size, blk_size)) |
| 1221 | return AVERROR_INVALIDDATA; |
| 1222 | if (codec2subblock(ctx, cx + blk_size, cy + blk_size, blk_size)) |
| 1223 | return AVERROR_INVALIDDATA; |
| 1224 | } |
| 1225 | break; |
| 1226 | } |
| 1227 | return 0; |
| 1228 | } |
| 1229 | |
| 1230 | static int decode_2(SANMVideoContext *ctx) |
| 1231 | { |
| 1232 | int cx, cy, ret; |
| 1233 | |
| 1234 | for (cy = 0; cy < ctx->aligned_height; cy += 8) |
| 1235 | for (cx = 0; cx < ctx->aligned_width; cx += 8) |
| 1236 | if (ret = codec2subblock(ctx, cx, cy, 8)) |
| 1237 | return ret; |
| 1238 | |
| 1239 | return 0; |
| 1240 | } |
| 1241 | |
| 1242 | static int decode_3(SANMVideoContext *ctx) |
| 1243 | { |
| 1244 | memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size); |
| 1245 | return 0; |
| 1246 | } |
| 1247 | |
| 1248 | static int decode_4(SANMVideoContext *ctx) |
| 1249 | { |
| 1250 | memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size); |
| 1251 | return 0; |
| 1252 | } |
| 1253 | |
| 1254 | static int decode_5(SANMVideoContext *ctx) |
| 1255 | { |
| 1256 | #if HAVE_BIGENDIAN |
| 1257 | uint16_t *frm; |
| 1258 | int npixels; |
| 1259 | #endif |
| 1260 | uint8_t *dst = (uint8_t*)ctx->frm0; |
| 1261 | |
| 1262 | if (rle_decode(ctx, dst, ctx->buf_size)) |
| 1263 | return AVERROR_INVALIDDATA; |
| 1264 | |
| 1265 | #if HAVE_BIGENDIAN |
| 1266 | npixels = ctx->npixels; |
| 1267 | frm = ctx->frm0; |
| 1268 | while (npixels--) { |
| 1269 | *frm = av_bswap16(*frm); |
| 1270 | frm++; |
| 1271 | } |
| 1272 | #endif |
| 1273 | |
| 1274 | return 0; |
| 1275 | } |
| 1276 | |
| 1277 | static int decode_6(SANMVideoContext *ctx) |
| 1278 | { |
| 1279 | int npixels = ctx->npixels; |
| 1280 | uint16_t *frm = ctx->frm0; |
| 1281 | |
| 1282 | if (bytestream2_get_bytes_left(&ctx->gb) < npixels) { |
| 1283 | av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for frame.\n"); |
| 1284 | return AVERROR_INVALIDDATA; |
| 1285 | } |
| 1286 | while (npixels--) |
| 1287 | *frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; |
| 1288 | |
| 1289 | return 0; |
| 1290 | } |
| 1291 | |
| 1292 | static int decode_8(SANMVideoContext *ctx) |
| 1293 | { |
| 1294 | uint16_t *pdest = ctx->frm0; |
| 1295 | uint8_t *rsrc; |
| 1296 | long npixels = ctx->npixels; |
| 1297 | |
| 1298 | av_fast_malloc(&ctx->rle_buf, &ctx->rle_buf_size, npixels); |
| 1299 | if (!ctx->rle_buf) { |
| 1300 | av_log(ctx->avctx, AV_LOG_ERROR, "RLE buffer allocation failed.\n"); |
| 1301 | return AVERROR(ENOMEM); |
| 1302 | } |
| 1303 | rsrc = ctx->rle_buf; |
| 1304 | |
| 1305 | if (rle_decode(ctx, rsrc, npixels)) |
| 1306 | return AVERROR_INVALIDDATA; |
| 1307 | |
| 1308 | while (npixels--) |
| 1309 | *pdest++ = ctx->codebook[*rsrc++]; |
| 1310 | |
| 1311 | return 0; |
| 1312 | } |
| 1313 | |
| 1314 | typedef int (*frm_decoder)(SANMVideoContext *ctx); |
| 1315 | |
| 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 |
| 1319 | }; |
| 1320 | |
| 1321 | static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr) |
| 1322 | { |
| 1323 | int i, ret; |
| 1324 | |
| 1325 | if ((ret = bytestream2_get_bytes_left(&ctx->gb)) < 560) { |
| 1326 | av_log(ctx->avctx, AV_LOG_ERROR, "Input frame too short (%d bytes).\n", |
| 1327 | ret); |
| 1328 | return AVERROR_INVALIDDATA; |
| 1329 | } |
| 1330 | bytestream2_skip(&ctx->gb, 8); // skip pad |
| 1331 | |
| 1332 | hdr->width = bytestream2_get_le32u(&ctx->gb); |
| 1333 | hdr->height = bytestream2_get_le32u(&ctx->gb); |
| 1334 | |
| 1335 | if (hdr->width != ctx->width || hdr->height != ctx->height) { |
| 1336 | avpriv_report_missing_feature(ctx->avctx, "Variable size frames"); |
| 1337 | return AVERROR_PATCHWELCOME; |
| 1338 | } |
| 1339 | |
| 1340 | hdr->seq_num = bytestream2_get_le16u(&ctx->gb); |
| 1341 | hdr->codec = bytestream2_get_byteu(&ctx->gb); |
| 1342 | hdr->rotate_code = bytestream2_get_byteu(&ctx->gb); |
| 1343 | |
| 1344 | bytestream2_skip(&ctx->gb, 4); // skip pad |
| 1345 | |
| 1346 | for (i = 0; i < 4; i++) |
| 1347 | ctx->small_codebook[i] = bytestream2_get_le16u(&ctx->gb); |
| 1348 | hdr->bg_color = bytestream2_get_le16u(&ctx->gb); |
| 1349 | |
| 1350 | bytestream2_skip(&ctx->gb, 2); // skip pad |
| 1351 | |
| 1352 | hdr->rle_output_size = bytestream2_get_le32u(&ctx->gb); |
| 1353 | for (i = 0; i < 256; i++) |
| 1354 | ctx->codebook[i] = bytestream2_get_le16u(&ctx->gb); |
| 1355 | |
| 1356 | bytestream2_skip(&ctx->gb, 8); // skip pad |
| 1357 | |
| 1358 | return 0; |
| 1359 | } |
| 1360 | |
| 1361 | static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color) |
| 1362 | { |
| 1363 | while (buf_size--) |
| 1364 | *pbuf++ = color; |
| 1365 | } |
| 1366 | |
| 1367 | static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr) |
| 1368 | { |
| 1369 | uint8_t *dst; |
| 1370 | const uint8_t *src = (uint8_t*) ctx->frm0; |
| 1371 | int ret, dstpitch, height = ctx->height; |
| 1372 | int srcpitch = ctx->pitch * (hdr ? sizeof(ctx->frm0[0]) : 1); |
| 1373 | |
| 1374 | if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0) |
| 1375 | return ret; |
| 1376 | |
| 1377 | dst = ctx->frame->data[0]; |
| 1378 | dstpitch = ctx->frame->linesize[0]; |
| 1379 | |
| 1380 | while (height--) { |
| 1381 | memcpy(dst, src, srcpitch); |
| 1382 | src += srcpitch; |
| 1383 | dst += dstpitch; |
| 1384 | } |
| 1385 | |
| 1386 | return 0; |
| 1387 | } |
| 1388 | |
| 1389 | static int decode_frame(AVCodecContext *avctx, void *data, |
| 1390 | int *got_frame_ptr, AVPacket *pkt) |
| 1391 | { |
| 1392 | SANMVideoContext *ctx = avctx->priv_data; |
| 1393 | int i, ret; |
| 1394 | |
| 1395 | ctx->frame = data; |
| 1396 | bytestream2_init(&ctx->gb, pkt->data, pkt->size); |
| 1397 | |
| 1398 | if (!ctx->version) { |
| 1399 | int to_store = 0; |
| 1400 | |
| 1401 | while (bytestream2_get_bytes_left(&ctx->gb) >= 8) { |
| 1402 | uint32_t sig, size; |
| 1403 | int pos; |
| 1404 | |
| 1405 | sig = bytestream2_get_be32u(&ctx->gb); |
| 1406 | size = bytestream2_get_be32u(&ctx->gb); |
| 1407 | pos = bytestream2_tell(&ctx->gb); |
| 1408 | |
| 1409 | if (bytestream2_get_bytes_left(&ctx->gb) < size) { |
| 1410 | av_log(avctx, AV_LOG_ERROR, "Incorrect chunk size %"PRIu32".\n", size); |
| 1411 | break; |
| 1412 | } |
| 1413 | switch (sig) { |
| 1414 | case MKBETAG('N', 'P', 'A', 'L'): |
| 1415 | if (size != PALETTE_SIZE * 3) { |
| 1416 | av_log(avctx, AV_LOG_ERROR, |
| 1417 | "Incorrect palette block size %"PRIu32".\n", size); |
| 1418 | return AVERROR_INVALIDDATA; |
| 1419 | } |
| 1420 | for (i = 0; i < PALETTE_SIZE; i++) |
| 1421 | ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); |
| 1422 | break; |
| 1423 | case MKBETAG('F', 'O', 'B', 'J'): |
| 1424 | if (size < 16) |
| 1425 | return AVERROR_INVALIDDATA; |
| 1426 | if (ret = process_frame_obj(ctx)) |
| 1427 | return ret; |
| 1428 | break; |
| 1429 | case MKBETAG('X', 'P', 'A', 'L'): |
| 1430 | if (size == 6 || size == 4) { |
| 1431 | uint8_t tmp[3]; |
| 1432 | int j; |
| 1433 | |
| 1434 | for (i = 0; i < PALETTE_SIZE; i++) { |
| 1435 | for (j = 0; j < 3; j++) { |
| 1436 | int t = (ctx->pal[i] >> (16 - j * 8)) & 0xFF; |
| 1437 | tmp[j] = av_clip_uint8((t * 129 + ctx->delta_pal[i * 3 + j]) >> 7); |
| 1438 | } |
| 1439 | ctx->pal[i] = 0xFFU << 24 | AV_RB24(tmp); |
| 1440 | } |
| 1441 | } else { |
| 1442 | if (size < PALETTE_DELTA * 2 + 4) { |
| 1443 | av_log(avctx, AV_LOG_ERROR, |
| 1444 | "Incorrect palette change block size %"PRIu32".\n", |
| 1445 | size); |
| 1446 | return AVERROR_INVALIDDATA; |
| 1447 | } |
| 1448 | bytestream2_skipu(&ctx->gb, 4); |
| 1449 | for (i = 0; i < PALETTE_DELTA; i++) |
| 1450 | ctx->delta_pal[i] = bytestream2_get_le16u(&ctx->gb); |
| 1451 | if (size >= PALETTE_DELTA * 5 + 4) { |
| 1452 | for (i = 0; i < PALETTE_SIZE; i++) |
| 1453 | ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); |
| 1454 | } else { |
| 1455 | memset(ctx->pal, 0, sizeof(ctx->pal)); |
| 1456 | } |
| 1457 | } |
| 1458 | break; |
| 1459 | case MKBETAG('S', 'T', 'O', 'R'): |
| 1460 | to_store = 1; |
| 1461 | break; |
| 1462 | case MKBETAG('F', 'T', 'C', 'H'): |
| 1463 | memcpy(ctx->frm0, ctx->stored_frame, ctx->buf_size); |
| 1464 | break; |
| 1465 | default: |
| 1466 | bytestream2_skip(&ctx->gb, size); |
| 1467 | av_log(avctx, AV_LOG_DEBUG, |
| 1468 | "Unknown/unsupported chunk %"PRIx32".\n", sig); |
| 1469 | break; |
| 1470 | } |
| 1471 | |
| 1472 | bytestream2_seek(&ctx->gb, pos + size, SEEK_SET); |
| 1473 | if (size & 1) |
| 1474 | bytestream2_skip(&ctx->gb, 1); |
| 1475 | } |
| 1476 | if (to_store) |
| 1477 | memcpy(ctx->stored_frame, ctx->frm0, ctx->buf_size); |
| 1478 | if ((ret = copy_output(ctx, NULL))) |
| 1479 | return ret; |
| 1480 | memcpy(ctx->frame->data[1], ctx->pal, 1024); |
| 1481 | } else { |
| 1482 | SANMFrameHeader header; |
| 1483 | |
| 1484 | if ((ret = read_frame_header(ctx, &header))) |
| 1485 | return ret; |
| 1486 | |
| 1487 | ctx->rotate_code = header.rotate_code; |
| 1488 | if ((ctx->frame->key_frame = !header.seq_num)) { |
| 1489 | ctx->frame->pict_type = AV_PICTURE_TYPE_I; |
| 1490 | fill_frame(ctx->frm1, ctx->npixels, header.bg_color); |
| 1491 | fill_frame(ctx->frm2, ctx->npixels, header.bg_color); |
| 1492 | } else { |
| 1493 | ctx->frame->pict_type = AV_PICTURE_TYPE_P; |
| 1494 | } |
| 1495 | |
| 1496 | if (header.codec < FF_ARRAY_ELEMS(v1_decoders)) { |
| 1497 | if ((ret = v1_decoders[header.codec](ctx))) { |
| 1498 | av_log(avctx, AV_LOG_ERROR, |
| 1499 | "Subcodec %d: error decoding frame.\n", header.codec); |
| 1500 | return ret; |
| 1501 | } |
| 1502 | } else { |
| 1503 | avpriv_request_sample(avctx, "Subcodec %d", header.codec); |
| 1504 | return AVERROR_PATCHWELCOME; |
| 1505 | } |
| 1506 | |
| 1507 | if ((ret = copy_output(ctx, &header))) |
| 1508 | return ret; |
| 1509 | } |
| 1510 | if (ctx->rotate_code) |
| 1511 | rotate_bufs(ctx, ctx->rotate_code); |
| 1512 | |
| 1513 | *got_frame_ptr = 1; |
| 1514 | |
| 1515 | return pkt->size; |
| 1516 | } |
| 1517 | |
| 1518 | AVCodec ff_sanm_decoder = { |
| 1519 | .name = "sanm", |
| 1520 | .long_name = NULL_IF_CONFIG_SMALL("LucasArts SANM/Smush video"), |
| 1521 | .type = AVMEDIA_TYPE_VIDEO, |
| 1522 | .id = AV_CODEC_ID_SANM, |
| 1523 | .priv_data_size = sizeof(SANMVideoContext), |
| 1524 | .init = decode_init, |
| 1525 | .close = decode_end, |
| 1526 | .decode = decode_frame, |
| 1527 | .capabilities = CODEC_CAP_DR1, |
| 1528 | }; |