| 1 | /* |
| 2 | * SVQ1 decoder |
| 3 | * ported to MPlayer by Arpi <arpi@thot.banki.hu> |
| 4 | * ported to libavcodec by Nick Kurshev <nickols_k@mail.ru> |
| 5 | * |
| 6 | * Copyright (c) 2002 The Xine Project |
| 7 | * Copyright (c) 2002 The FFmpeg Project |
| 8 | * |
| 9 | * SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net> |
| 10 | * |
| 11 | * This file is part of FFmpeg. |
| 12 | * |
| 13 | * FFmpeg is free software; you can redistribute it and/or |
| 14 | * modify it under the terms of the GNU Lesser General Public |
| 15 | * License as published by the Free Software Foundation; either |
| 16 | * version 2.1 of the License, or (at your option) any later version. |
| 17 | * |
| 18 | * FFmpeg is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 21 | * Lesser General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU Lesser General Public |
| 24 | * License along with FFmpeg; if not, write to the Free Software |
| 25 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 26 | */ |
| 27 | |
| 28 | /** |
| 29 | * @file |
| 30 | * Sorenson Vector Quantizer #1 (SVQ1) video codec. |
| 31 | * For more information of the SVQ1 algorithm, visit: |
| 32 | * http://www.pcisys.net/~melanson/codecs/ |
| 33 | */ |
| 34 | |
| 35 | #include "avcodec.h" |
| 36 | #include "get_bits.h" |
| 37 | #include "h263.h" |
| 38 | #include "hpeldsp.h" |
| 39 | #include "internal.h" |
| 40 | #include "mathops.h" |
| 41 | #include "svq1.h" |
| 42 | |
| 43 | #undef NDEBUG |
| 44 | #include <assert.h> |
| 45 | |
| 46 | static VLC svq1_block_type; |
| 47 | static VLC svq1_motion_component; |
| 48 | static VLC svq1_intra_multistage[6]; |
| 49 | static VLC svq1_inter_multistage[6]; |
| 50 | static VLC svq1_intra_mean; |
| 51 | static VLC svq1_inter_mean; |
| 52 | |
| 53 | /* motion vector (prediction) */ |
| 54 | typedef struct svq1_pmv_s { |
| 55 | int x; |
| 56 | int y; |
| 57 | } svq1_pmv; |
| 58 | |
| 59 | typedef struct SVQ1Context { |
| 60 | HpelDSPContext hdsp; |
| 61 | GetBitContext gb; |
| 62 | AVFrame *prev; |
| 63 | |
| 64 | uint8_t *pkt_swapped; |
| 65 | int pkt_swapped_allocated; |
| 66 | |
| 67 | int width; |
| 68 | int height; |
| 69 | int frame_code; |
| 70 | int nonref; // 1 if the current frame won't be referenced |
| 71 | } SVQ1Context; |
| 72 | |
| 73 | static const uint8_t string_table[256] = { |
| 74 | 0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54, |
| 75 | 0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D, |
| 76 | 0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06, |
| 77 | 0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F, |
| 78 | 0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0, |
| 79 | 0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9, |
| 80 | 0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2, |
| 81 | 0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B, |
| 82 | 0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9, |
| 83 | 0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0, |
| 84 | 0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B, |
| 85 | 0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2, |
| 86 | 0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D, |
| 87 | 0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44, |
| 88 | 0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F, |
| 89 | 0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16, |
| 90 | 0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB, |
| 91 | 0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92, |
| 92 | 0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9, |
| 93 | 0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0, |
| 94 | 0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F, |
| 95 | 0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36, |
| 96 | 0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D, |
| 97 | 0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64, |
| 98 | 0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26, |
| 99 | 0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F, |
| 100 | 0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74, |
| 101 | 0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D, |
| 102 | 0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82, |
| 103 | 0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB, |
| 104 | 0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0, |
| 105 | 0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9 |
| 106 | }; |
| 107 | |
| 108 | #define SVQ1_PROCESS_VECTOR() \ |
| 109 | for (; level > 0; i++) { \ |
| 110 | /* process next depth */ \ |
| 111 | if (i == m) { \ |
| 112 | m = n; \ |
| 113 | if (--level == 0) \ |
| 114 | break; \ |
| 115 | } \ |
| 116 | /* divide block if next bit set */ \ |
| 117 | if (!get_bits1(bitbuf)) \ |
| 118 | break; \ |
| 119 | /* add child nodes */ \ |
| 120 | list[n++] = list[i]; \ |
| 121 | list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level >> 1) + 1));\ |
| 122 | } |
| 123 | |
| 124 | #define SVQ1_ADD_CODEBOOK() \ |
| 125 | /* add codebook entries to vector */ \ |
| 126 | for (j = 0; j < stages; j++) { \ |
| 127 | n3 = codebook[entries[j]] ^ 0x80808080; \ |
| 128 | n1 += (n3 & 0xFF00FF00) >> 8; \ |
| 129 | n2 += n3 & 0x00FF00FF; \ |
| 130 | } \ |
| 131 | \ |
| 132 | /* clip to [0..255] */ \ |
| 133 | if (n1 & 0xFF00FF00) { \ |
| 134 | n3 = (n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \ |
| 135 | n1 += 0x7F007F00; \ |
| 136 | n1 |= (~n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \ |
| 137 | n1 &= n3 & 0x00FF00FF; \ |
| 138 | } \ |
| 139 | \ |
| 140 | if (n2 & 0xFF00FF00) { \ |
| 141 | n3 = (n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \ |
| 142 | n2 += 0x7F007F00; \ |
| 143 | n2 |= (~n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \ |
| 144 | n2 &= n3 & 0x00FF00FF; \ |
| 145 | } |
| 146 | |
| 147 | #define SVQ1_CALC_CODEBOOK_ENTRIES(cbook) \ |
| 148 | codebook = (const uint32_t *)cbook[level]; \ |
| 149 | if (stages > 0) \ |
| 150 | bit_cache = get_bits(bitbuf, 4 * stages); \ |
| 151 | /* calculate codebook entries for this vector */ \ |
| 152 | for (j = 0; j < stages; j++) { \ |
| 153 | entries[j] = (((bit_cache >> (4 * (stages - j - 1))) & 0xF) + \ |
| 154 | 16 * j) << (level + 1); \ |
| 155 | } \ |
| 156 | mean -= stages * 128; \ |
| 157 | n4 = (mean << 16) + mean; |
| 158 | |
| 159 | static int svq1_decode_block_intra(GetBitContext *bitbuf, uint8_t *pixels, |
| 160 | int pitch) |
| 161 | { |
| 162 | uint32_t bit_cache; |
| 163 | uint8_t *list[63]; |
| 164 | uint32_t *dst; |
| 165 | const uint32_t *codebook; |
| 166 | int entries[6]; |
| 167 | int i, j, m, n; |
| 168 | int mean, stages; |
| 169 | unsigned x, y, width, height, level; |
| 170 | uint32_t n1, n2, n3, n4; |
| 171 | |
| 172 | /* initialize list for breadth first processing of vectors */ |
| 173 | list[0] = pixels; |
| 174 | |
| 175 | /* recursively process vector */ |
| 176 | for (i = 0, m = 1, n = 1, level = 5; i < n; i++) { |
| 177 | SVQ1_PROCESS_VECTOR(); |
| 178 | |
| 179 | /* destination address and vector size */ |
| 180 | dst = (uint32_t *)list[i]; |
| 181 | width = 1 << ((4 + level) / 2); |
| 182 | height = 1 << ((3 + level) / 2); |
| 183 | |
| 184 | /* get number of stages (-1 skips vector, 0 for mean only) */ |
| 185 | stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1; |
| 186 | |
| 187 | if (stages == -1) { |
| 188 | for (y = 0; y < height; y++) |
| 189 | memset(&dst[y * (pitch / 4)], 0, width); |
| 190 | continue; /* skip vector */ |
| 191 | } |
| 192 | |
| 193 | if (stages > 0 && level >= 4) { |
| 194 | av_dlog(NULL, |
| 195 | "Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n", |
| 196 | stages, level); |
| 197 | return AVERROR_INVALIDDATA; /* invalid vector */ |
| 198 | } |
| 199 | |
| 200 | mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3); |
| 201 | |
| 202 | if (stages == 0) { |
| 203 | for (y = 0; y < height; y++) |
| 204 | memset(&dst[y * (pitch / 4)], mean, width); |
| 205 | } else { |
| 206 | SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_intra_codebooks); |
| 207 | |
| 208 | for (y = 0; y < height; y++) { |
| 209 | for (x = 0; x < width / 4; x++, codebook++) { |
| 210 | n1 = n4; |
| 211 | n2 = n4; |
| 212 | SVQ1_ADD_CODEBOOK() |
| 213 | /* store result */ |
| 214 | dst[x] = n1 << 8 | n2; |
| 215 | } |
| 216 | dst += pitch / 4; |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels, |
| 225 | int pitch) |
| 226 | { |
| 227 | uint32_t bit_cache; |
| 228 | uint8_t *list[63]; |
| 229 | uint32_t *dst; |
| 230 | const uint32_t *codebook; |
| 231 | int entries[6]; |
| 232 | int i, j, m, n; |
| 233 | int mean, stages; |
| 234 | int x, y, width, height, level; |
| 235 | uint32_t n1, n2, n3, n4; |
| 236 | |
| 237 | /* initialize list for breadth first processing of vectors */ |
| 238 | list[0] = pixels; |
| 239 | |
| 240 | /* recursively process vector */ |
| 241 | for (i = 0, m = 1, n = 1, level = 5; i < n; i++) { |
| 242 | SVQ1_PROCESS_VECTOR(); |
| 243 | |
| 244 | /* destination address and vector size */ |
| 245 | dst = (uint32_t *)list[i]; |
| 246 | width = 1 << ((4 + level) / 2); |
| 247 | height = 1 << ((3 + level) / 2); |
| 248 | |
| 249 | /* get number of stages (-1 skips vector, 0 for mean only) */ |
| 250 | stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1; |
| 251 | |
| 252 | if (stages == -1) |
| 253 | continue; /* skip vector */ |
| 254 | |
| 255 | if ((stages > 0) && (level >= 4)) { |
| 256 | av_dlog(NULL, |
| 257 | "Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n", |
| 258 | stages, level); |
| 259 | return AVERROR_INVALIDDATA; /* invalid vector */ |
| 260 | } |
| 261 | |
| 262 | mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256; |
| 263 | |
| 264 | SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks); |
| 265 | |
| 266 | for (y = 0; y < height; y++) { |
| 267 | for (x = 0; x < width / 4; x++, codebook++) { |
| 268 | n3 = dst[x]; |
| 269 | /* add mean value to vector */ |
| 270 | n1 = n4 + ((n3 & 0xFF00FF00) >> 8); |
| 271 | n2 = n4 + (n3 & 0x00FF00FF); |
| 272 | SVQ1_ADD_CODEBOOK() |
| 273 | /* store result */ |
| 274 | dst[x] = n1 << 8 | n2; |
| 275 | } |
| 276 | dst += pitch / 4; |
| 277 | } |
| 278 | } |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | static int svq1_decode_motion_vector(GetBitContext *bitbuf, svq1_pmv *mv, |
| 283 | svq1_pmv **pmv) |
| 284 | { |
| 285 | int diff; |
| 286 | int i; |
| 287 | |
| 288 | for (i = 0; i < 2; i++) { |
| 289 | /* get motion code */ |
| 290 | diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2); |
| 291 | if (diff < 0) |
| 292 | return AVERROR_INVALIDDATA; |
| 293 | else if (diff) { |
| 294 | if (get_bits1(bitbuf)) |
| 295 | diff = -diff; |
| 296 | } |
| 297 | |
| 298 | /* add median of motion vector predictors and clip result */ |
| 299 | if (i == 1) |
| 300 | mv->y = sign_extend(diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y), 6); |
| 301 | else |
| 302 | mv->x = sign_extend(diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x), 6); |
| 303 | } |
| 304 | |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | static void svq1_skip_block(uint8_t *current, uint8_t *previous, |
| 309 | int pitch, int x, int y) |
| 310 | { |
| 311 | uint8_t *src; |
| 312 | uint8_t *dst; |
| 313 | int i; |
| 314 | |
| 315 | src = &previous[x + y * pitch]; |
| 316 | dst = current; |
| 317 | |
| 318 | for (i = 0; i < 16; i++) { |
| 319 | memcpy(dst, src, 16); |
| 320 | src += pitch; |
| 321 | dst += pitch; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | static int svq1_motion_inter_block(HpelDSPContext *hdsp, GetBitContext *bitbuf, |
| 326 | uint8_t *current, uint8_t *previous, |
| 327 | int pitch, svq1_pmv *motion, int x, int y, |
| 328 | int width, int height) |
| 329 | { |
| 330 | uint8_t *src; |
| 331 | uint8_t *dst; |
| 332 | svq1_pmv mv; |
| 333 | svq1_pmv *pmv[3]; |
| 334 | int result; |
| 335 | |
| 336 | /* predict and decode motion vector */ |
| 337 | pmv[0] = &motion[0]; |
| 338 | if (y == 0) { |
| 339 | pmv[1] = |
| 340 | pmv[2] = pmv[0]; |
| 341 | } else { |
| 342 | pmv[1] = &motion[x / 8 + 2]; |
| 343 | pmv[2] = &motion[x / 8 + 4]; |
| 344 | } |
| 345 | |
| 346 | result = svq1_decode_motion_vector(bitbuf, &mv, pmv); |
| 347 | if (result) |
| 348 | return result; |
| 349 | |
| 350 | motion[0].x = |
| 351 | motion[x / 8 + 2].x = |
| 352 | motion[x / 8 + 3].x = mv.x; |
| 353 | motion[0].y = |
| 354 | motion[x / 8 + 2].y = |
| 355 | motion[x / 8 + 3].y = mv.y; |
| 356 | |
| 357 | mv.x = av_clip(mv.x, -2 * x, 2 * (width - x - 16)); |
| 358 | mv.y = av_clip(mv.y, -2 * y, 2 * (height - y - 16)); |
| 359 | |
| 360 | src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1)) * pitch]; |
| 361 | dst = current; |
| 362 | |
| 363 | hdsp->put_pixels_tab[0][(mv.y & 1) << 1 | (mv.x & 1)](dst, src, pitch, 16); |
| 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | |
| 368 | static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbuf, |
| 369 | uint8_t *current, uint8_t *previous, |
| 370 | int pitch, svq1_pmv *motion, int x, int y, |
| 371 | int width, int height) |
| 372 | { |
| 373 | uint8_t *src; |
| 374 | uint8_t *dst; |
| 375 | svq1_pmv mv; |
| 376 | svq1_pmv *pmv[4]; |
| 377 | int i, result; |
| 378 | |
| 379 | /* predict and decode motion vector (0) */ |
| 380 | pmv[0] = &motion[0]; |
| 381 | if (y == 0) { |
| 382 | pmv[1] = |
| 383 | pmv[2] = pmv[0]; |
| 384 | } else { |
| 385 | pmv[1] = &motion[(x / 8) + 2]; |
| 386 | pmv[2] = &motion[(x / 8) + 4]; |
| 387 | } |
| 388 | |
| 389 | result = svq1_decode_motion_vector(bitbuf, &mv, pmv); |
| 390 | if (result) |
| 391 | return result; |
| 392 | |
| 393 | /* predict and decode motion vector (1) */ |
| 394 | pmv[0] = &mv; |
| 395 | if (y == 0) { |
| 396 | pmv[1] = |
| 397 | pmv[2] = pmv[0]; |
| 398 | } else { |
| 399 | pmv[1] = &motion[(x / 8) + 3]; |
| 400 | } |
| 401 | result = svq1_decode_motion_vector(bitbuf, &motion[0], pmv); |
| 402 | if (result) |
| 403 | return result; |
| 404 | |
| 405 | /* predict and decode motion vector (2) */ |
| 406 | pmv[1] = &motion[0]; |
| 407 | pmv[2] = &motion[(x / 8) + 1]; |
| 408 | |
| 409 | result = svq1_decode_motion_vector(bitbuf, &motion[(x / 8) + 2], pmv); |
| 410 | if (result) |
| 411 | return result; |
| 412 | |
| 413 | /* predict and decode motion vector (3) */ |
| 414 | pmv[2] = &motion[(x / 8) + 2]; |
| 415 | pmv[3] = &motion[(x / 8) + 3]; |
| 416 | |
| 417 | result = svq1_decode_motion_vector(bitbuf, pmv[3], pmv); |
| 418 | if (result) |
| 419 | return result; |
| 420 | |
| 421 | /* form predictions */ |
| 422 | for (i = 0; i < 4; i++) { |
| 423 | int mvx = pmv[i]->x + (i & 1) * 16; |
| 424 | int mvy = pmv[i]->y + (i >> 1) * 16; |
| 425 | |
| 426 | // FIXME: clipping or padding? |
| 427 | mvx = av_clip(mvx, -2 * x, 2 * (width - x - 8)); |
| 428 | mvy = av_clip(mvy, -2 * y, 2 * (height - y - 8)); |
| 429 | |
| 430 | src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1)) * pitch]; |
| 431 | dst = current; |
| 432 | |
| 433 | hdsp->put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst, src, pitch, 8); |
| 434 | |
| 435 | /* select next block */ |
| 436 | if (i & 1) |
| 437 | current += 8 * (pitch - 1); |
| 438 | else |
| 439 | current += 8; |
| 440 | } |
| 441 | |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | static int svq1_decode_delta_block(AVCodecContext *avctx, HpelDSPContext *hdsp, |
| 446 | GetBitContext *bitbuf, |
| 447 | uint8_t *current, uint8_t *previous, |
| 448 | int pitch, svq1_pmv *motion, int x, int y, |
| 449 | int width, int height) |
| 450 | { |
| 451 | uint32_t block_type; |
| 452 | int result = 0; |
| 453 | |
| 454 | /* get block type */ |
| 455 | block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2); |
| 456 | |
| 457 | /* reset motion vectors */ |
| 458 | if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) { |
| 459 | motion[0].x = |
| 460 | motion[0].y = |
| 461 | motion[x / 8 + 2].x = |
| 462 | motion[x / 8 + 2].y = |
| 463 | motion[x / 8 + 3].x = |
| 464 | motion[x / 8 + 3].y = 0; |
| 465 | } |
| 466 | |
| 467 | switch (block_type) { |
| 468 | case SVQ1_BLOCK_SKIP: |
| 469 | svq1_skip_block(current, previous, pitch, x, y); |
| 470 | break; |
| 471 | |
| 472 | case SVQ1_BLOCK_INTER: |
| 473 | result = svq1_motion_inter_block(hdsp, bitbuf, current, previous, |
| 474 | pitch, motion, x, y, width, height); |
| 475 | |
| 476 | if (result != 0) { |
| 477 | av_dlog(avctx, "Error in svq1_motion_inter_block %i\n", result); |
| 478 | break; |
| 479 | } |
| 480 | result = svq1_decode_block_non_intra(bitbuf, current, pitch); |
| 481 | break; |
| 482 | |
| 483 | case SVQ1_BLOCK_INTER_4V: |
| 484 | result = svq1_motion_inter_4v_block(hdsp, bitbuf, current, previous, |
| 485 | pitch, motion, x, y, width, height); |
| 486 | |
| 487 | if (result != 0) { |
| 488 | av_dlog(avctx, "Error in svq1_motion_inter_4v_block %i\n", result); |
| 489 | break; |
| 490 | } |
| 491 | result = svq1_decode_block_non_intra(bitbuf, current, pitch); |
| 492 | break; |
| 493 | |
| 494 | case SVQ1_BLOCK_INTRA: |
| 495 | result = svq1_decode_block_intra(bitbuf, current, pitch); |
| 496 | break; |
| 497 | } |
| 498 | |
| 499 | return result; |
| 500 | } |
| 501 | |
| 502 | static void svq1_parse_string(GetBitContext *bitbuf, uint8_t out[257]) |
| 503 | { |
| 504 | uint8_t seed; |
| 505 | int i; |
| 506 | |
| 507 | out[0] = get_bits(bitbuf, 8); |
| 508 | seed = string_table[out[0]]; |
| 509 | |
| 510 | for (i = 1; i <= out[0]; i++) { |
| 511 | out[i] = get_bits(bitbuf, 8) ^ seed; |
| 512 | seed = string_table[out[i] ^ seed]; |
| 513 | } |
| 514 | out[i] = 0; |
| 515 | } |
| 516 | |
| 517 | static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame) |
| 518 | { |
| 519 | SVQ1Context *s = avctx->priv_data; |
| 520 | GetBitContext *bitbuf = &s->gb; |
| 521 | int frame_size_code; |
| 522 | int width = s->width; |
| 523 | int height = s->height; |
| 524 | |
| 525 | skip_bits(bitbuf, 8); /* temporal_reference */ |
| 526 | |
| 527 | /* frame type */ |
| 528 | s->nonref = 0; |
| 529 | switch (get_bits(bitbuf, 2)) { |
| 530 | case 0: |
| 531 | frame->pict_type = AV_PICTURE_TYPE_I; |
| 532 | break; |
| 533 | case 2: |
| 534 | s->nonref = 1; |
| 535 | case 1: |
| 536 | frame->pict_type = AV_PICTURE_TYPE_P; |
| 537 | break; |
| 538 | default: |
| 539 | av_log(avctx, AV_LOG_ERROR, "Invalid frame type.\n"); |
| 540 | return AVERROR_INVALIDDATA; |
| 541 | } |
| 542 | |
| 543 | if (frame->pict_type == AV_PICTURE_TYPE_I) { |
| 544 | /* unknown fields */ |
| 545 | if (s->frame_code == 0x50 || s->frame_code == 0x60) { |
| 546 | int csum = get_bits(bitbuf, 16); |
| 547 | |
| 548 | csum = ff_svq1_packet_checksum(bitbuf->buffer, |
| 549 | bitbuf->size_in_bits >> 3, |
| 550 | csum); |
| 551 | |
| 552 | av_dlog(avctx, "%s checksum (%02x) for packet data\n", |
| 553 | (csum == 0) ? "correct" : "incorrect", csum); |
| 554 | } |
| 555 | |
| 556 | if ((s->frame_code ^ 0x10) >= 0x50) { |
| 557 | uint8_t msg[257]; |
| 558 | |
| 559 | svq1_parse_string(bitbuf, msg); |
| 560 | |
| 561 | av_log(avctx, AV_LOG_INFO, |
| 562 | "embedded message:\n%s\n", ((char *)msg) + 1); |
| 563 | } |
| 564 | |
| 565 | skip_bits(bitbuf, 2); |
| 566 | skip_bits(bitbuf, 2); |
| 567 | skip_bits1(bitbuf); |
| 568 | |
| 569 | /* load frame size */ |
| 570 | frame_size_code = get_bits(bitbuf, 3); |
| 571 | |
| 572 | if (frame_size_code == 7) { |
| 573 | /* load width, height (12 bits each) */ |
| 574 | width = get_bits(bitbuf, 12); |
| 575 | height = get_bits(bitbuf, 12); |
| 576 | |
| 577 | if (!width || !height) |
| 578 | return AVERROR_INVALIDDATA; |
| 579 | } else { |
| 580 | /* get width, height from table */ |
| 581 | width = ff_svq1_frame_size_table[frame_size_code][0]; |
| 582 | height = ff_svq1_frame_size_table[frame_size_code][1]; |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | /* unknown fields */ |
| 587 | if (get_bits1(bitbuf)) { |
| 588 | skip_bits1(bitbuf); /* use packet checksum if (1) */ |
| 589 | skip_bits1(bitbuf); /* component checksums after image data if (1) */ |
| 590 | |
| 591 | if (get_bits(bitbuf, 2) != 0) |
| 592 | return AVERROR_INVALIDDATA; |
| 593 | } |
| 594 | |
| 595 | if (get_bits1(bitbuf)) { |
| 596 | skip_bits1(bitbuf); |
| 597 | skip_bits(bitbuf, 4); |
| 598 | skip_bits1(bitbuf); |
| 599 | skip_bits(bitbuf, 2); |
| 600 | |
| 601 | if (skip_1stop_8data_bits(bitbuf) < 0) |
| 602 | return AVERROR_INVALIDDATA; |
| 603 | } |
| 604 | |
| 605 | s->width = width; |
| 606 | s->height = height; |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | static int svq1_decode_frame(AVCodecContext *avctx, void *data, |
| 611 | int *got_frame, AVPacket *avpkt) |
| 612 | { |
| 613 | const uint8_t *buf = avpkt->data; |
| 614 | int buf_size = avpkt->size; |
| 615 | SVQ1Context *s = avctx->priv_data; |
| 616 | AVFrame *cur = data; |
| 617 | uint8_t *current; |
| 618 | int result, i, x, y, width, height; |
| 619 | svq1_pmv *pmv; |
| 620 | |
| 621 | /* initialize bit buffer */ |
| 622 | init_get_bits8(&s->gb, buf, buf_size); |
| 623 | |
| 624 | /* decode frame header */ |
| 625 | s->frame_code = get_bits(&s->gb, 22); |
| 626 | |
| 627 | if ((s->frame_code & ~0x70) || !(s->frame_code & 0x60)) |
| 628 | return AVERROR_INVALIDDATA; |
| 629 | |
| 630 | /* swap some header bytes (why?) */ |
| 631 | if (s->frame_code != 0x20) { |
| 632 | uint32_t *src; |
| 633 | |
| 634 | if (buf_size < 9 * 4) { |
| 635 | av_log(avctx, AV_LOG_ERROR, "Input packet too small\n"); |
| 636 | return AVERROR_INVALIDDATA; |
| 637 | } |
| 638 | |
| 639 | av_fast_padded_malloc(&s->pkt_swapped, &s->pkt_swapped_allocated, |
| 640 | buf_size); |
| 641 | if (!s->pkt_swapped) |
| 642 | return AVERROR(ENOMEM); |
| 643 | |
| 644 | memcpy(s->pkt_swapped, buf, buf_size); |
| 645 | buf = s->pkt_swapped; |
| 646 | init_get_bits(&s->gb, buf, buf_size * 8); |
| 647 | skip_bits(&s->gb, 22); |
| 648 | |
| 649 | src = (uint32_t *)(s->pkt_swapped + 4); |
| 650 | |
| 651 | if (buf_size < 36) |
| 652 | return AVERROR_INVALIDDATA; |
| 653 | |
| 654 | for (i = 0; i < 4; i++) |
| 655 | src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i]; |
| 656 | } |
| 657 | |
| 658 | result = svq1_decode_frame_header(avctx, cur); |
| 659 | if (result != 0) { |
| 660 | av_dlog(avctx, "Error in svq1_decode_frame_header %i\n", result); |
| 661 | return result; |
| 662 | } |
| 663 | |
| 664 | result = ff_set_dimensions(avctx, s->width, s->height); |
| 665 | if (result < 0) |
| 666 | return result; |
| 667 | |
| 668 | if ((avctx->skip_frame >= AVDISCARD_NONREF && s->nonref) || |
| 669 | (avctx->skip_frame >= AVDISCARD_NONKEY && |
| 670 | cur->pict_type != AV_PICTURE_TYPE_I) || |
| 671 | avctx->skip_frame >= AVDISCARD_ALL) |
| 672 | return buf_size; |
| 673 | |
| 674 | result = ff_get_buffer(avctx, cur, s->nonref ? 0 : AV_GET_BUFFER_FLAG_REF); |
| 675 | if (result < 0) |
| 676 | return result; |
| 677 | |
| 678 | pmv = av_malloc((FFALIGN(s->width, 16) / 8 + 3) * sizeof(*pmv)); |
| 679 | if (!pmv) |
| 680 | return AVERROR(ENOMEM); |
| 681 | |
| 682 | /* decode y, u and v components */ |
| 683 | for (i = 0; i < 3; i++) { |
| 684 | int linesize = cur->linesize[i]; |
| 685 | if (i == 0) { |
| 686 | width = FFALIGN(s->width, 16); |
| 687 | height = FFALIGN(s->height, 16); |
| 688 | } else { |
| 689 | if (avctx->flags & CODEC_FLAG_GRAY) |
| 690 | break; |
| 691 | width = FFALIGN(s->width / 4, 16); |
| 692 | height = FFALIGN(s->height / 4, 16); |
| 693 | } |
| 694 | |
| 695 | current = cur->data[i]; |
| 696 | |
| 697 | if (cur->pict_type == AV_PICTURE_TYPE_I) { |
| 698 | /* keyframe */ |
| 699 | for (y = 0; y < height; y += 16) { |
| 700 | for (x = 0; x < width; x += 16) { |
| 701 | result = svq1_decode_block_intra(&s->gb, ¤t[x], |
| 702 | linesize); |
| 703 | if (result) { |
| 704 | av_log(avctx, AV_LOG_ERROR, |
| 705 | "Error in svq1_decode_block %i (keyframe)\n", |
| 706 | result); |
| 707 | goto err; |
| 708 | } |
| 709 | } |
| 710 | current += 16 * linesize; |
| 711 | } |
| 712 | } else { |
| 713 | /* delta frame */ |
| 714 | uint8_t *previous = s->prev->data[i]; |
| 715 | if (!previous || |
| 716 | s->prev->width != s->width || s->prev->height != s->height) { |
| 717 | av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n"); |
| 718 | result = AVERROR_INVALIDDATA; |
| 719 | goto err; |
| 720 | } |
| 721 | |
| 722 | memset(pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv)); |
| 723 | |
| 724 | for (y = 0; y < height; y += 16) { |
| 725 | for (x = 0; x < width; x += 16) { |
| 726 | result = svq1_decode_delta_block(avctx, &s->hdsp, |
| 727 | &s->gb, ¤t[x], |
| 728 | previous, linesize, |
| 729 | pmv, x, y, width, height); |
| 730 | if (result != 0) { |
| 731 | av_dlog(avctx, |
| 732 | "Error in svq1_decode_delta_block %i\n", |
| 733 | result); |
| 734 | goto err; |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | pmv[0].x = |
| 739 | pmv[0].y = 0; |
| 740 | |
| 741 | current += 16 * linesize; |
| 742 | } |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | if (!s->nonref) { |
| 747 | av_frame_unref(s->prev); |
| 748 | result = av_frame_ref(s->prev, cur); |
| 749 | if (result < 0) |
| 750 | goto err; |
| 751 | } |
| 752 | |
| 753 | *got_frame = 1; |
| 754 | result = buf_size; |
| 755 | |
| 756 | err: |
| 757 | av_free(pmv); |
| 758 | return result; |
| 759 | } |
| 760 | |
| 761 | static av_cold int svq1_decode_init(AVCodecContext *avctx) |
| 762 | { |
| 763 | SVQ1Context *s = avctx->priv_data; |
| 764 | int i; |
| 765 | int offset = 0; |
| 766 | |
| 767 | s->prev = av_frame_alloc(); |
| 768 | if (!s->prev) |
| 769 | return AVERROR(ENOMEM); |
| 770 | |
| 771 | s->width = avctx->width + 3 & ~3; |
| 772 | s->height = avctx->height + 3 & ~3; |
| 773 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
| 774 | |
| 775 | ff_hpeldsp_init(&s->hdsp, avctx->flags); |
| 776 | |
| 777 | INIT_VLC_STATIC(&svq1_block_type, 2, 4, |
| 778 | &ff_svq1_block_type_vlc[0][1], 2, 1, |
| 779 | &ff_svq1_block_type_vlc[0][0], 2, 1, 6); |
| 780 | |
| 781 | INIT_VLC_STATIC(&svq1_motion_component, 7, 33, |
| 782 | &ff_mvtab[0][1], 2, 1, |
| 783 | &ff_mvtab[0][0], 2, 1, 176); |
| 784 | |
| 785 | for (i = 0; i < 6; i++) { |
| 786 | static const uint8_t sizes[2][6] = { { 14, 10, 14, 18, 16, 18 }, |
| 787 | { 10, 10, 14, 14, 14, 16 } }; |
| 788 | static VLC_TYPE table[168][2]; |
| 789 | svq1_intra_multistage[i].table = &table[offset]; |
| 790 | svq1_intra_multistage[i].table_allocated = sizes[0][i]; |
| 791 | offset += sizes[0][i]; |
| 792 | init_vlc(&svq1_intra_multistage[i], 3, 8, |
| 793 | &ff_svq1_intra_multistage_vlc[i][0][1], 2, 1, |
| 794 | &ff_svq1_intra_multistage_vlc[i][0][0], 2, 1, |
| 795 | INIT_VLC_USE_NEW_STATIC); |
| 796 | svq1_inter_multistage[i].table = &table[offset]; |
| 797 | svq1_inter_multistage[i].table_allocated = sizes[1][i]; |
| 798 | offset += sizes[1][i]; |
| 799 | init_vlc(&svq1_inter_multistage[i], 3, 8, |
| 800 | &ff_svq1_inter_multistage_vlc[i][0][1], 2, 1, |
| 801 | &ff_svq1_inter_multistage_vlc[i][0][0], 2, 1, |
| 802 | INIT_VLC_USE_NEW_STATIC); |
| 803 | } |
| 804 | |
| 805 | INIT_VLC_STATIC(&svq1_intra_mean, 8, 256, |
| 806 | &ff_svq1_intra_mean_vlc[0][1], 4, 2, |
| 807 | &ff_svq1_intra_mean_vlc[0][0], 4, 2, 632); |
| 808 | |
| 809 | INIT_VLC_STATIC(&svq1_inter_mean, 9, 512, |
| 810 | &ff_svq1_inter_mean_vlc[0][1], 4, 2, |
| 811 | &ff_svq1_inter_mean_vlc[0][0], 4, 2, 1434); |
| 812 | |
| 813 | return 0; |
| 814 | } |
| 815 | |
| 816 | static av_cold int svq1_decode_end(AVCodecContext *avctx) |
| 817 | { |
| 818 | SVQ1Context *s = avctx->priv_data; |
| 819 | |
| 820 | av_frame_free(&s->prev); |
| 821 | av_freep(&s->pkt_swapped); |
| 822 | s->pkt_swapped_allocated = 0; |
| 823 | |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | static void svq1_flush(AVCodecContext *avctx) |
| 828 | { |
| 829 | SVQ1Context *s = avctx->priv_data; |
| 830 | |
| 831 | av_frame_unref(s->prev); |
| 832 | } |
| 833 | |
| 834 | AVCodec ff_svq1_decoder = { |
| 835 | .name = "svq1", |
| 836 | .long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"), |
| 837 | .type = AVMEDIA_TYPE_VIDEO, |
| 838 | .id = AV_CODEC_ID_SVQ1, |
| 839 | .priv_data_size = sizeof(SVQ1Context), |
| 840 | .init = svq1_decode_init, |
| 841 | .close = svq1_decode_end, |
| 842 | .decode = svq1_decode_frame, |
| 843 | .capabilities = CODEC_CAP_DR1, |
| 844 | .flush = svq1_flush, |
| 845 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P, |
| 846 | AV_PIX_FMT_NONE }, |
| 847 | }; |