| 1 | /* |
| 2 | * DVB subtitle decoding |
| 3 | * Copyright (c) 2005 Ian Caulfield |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "avcodec.h" |
| 23 | #include "get_bits.h" |
| 24 | #include "bytestream.h" |
| 25 | #include "libavutil/colorspace.h" |
| 26 | #include "libavutil/opt.h" |
| 27 | |
| 28 | #define DVBSUB_PAGE_SEGMENT 0x10 |
| 29 | #define DVBSUB_REGION_SEGMENT 0x11 |
| 30 | #define DVBSUB_CLUT_SEGMENT 0x12 |
| 31 | #define DVBSUB_OBJECT_SEGMENT 0x13 |
| 32 | #define DVBSUB_DISPLAYDEFINITION_SEGMENT 0x14 |
| 33 | #define DVBSUB_DISPLAY_SEGMENT 0x80 |
| 34 | |
| 35 | #define cm (ff_crop_tab + MAX_NEG_CROP) |
| 36 | |
| 37 | #ifdef DEBUG |
| 38 | #if 0 |
| 39 | static void png_save(const char *filename, uint8_t *bitmap, int w, int h, |
| 40 | uint32_t *rgba_palette) |
| 41 | { |
| 42 | int x, y, v; |
| 43 | FILE *f; |
| 44 | char fname[40], fname2[40]; |
| 45 | char command[1024]; |
| 46 | |
| 47 | snprintf(fname, 40, "%s.ppm", filename); |
| 48 | |
| 49 | f = fopen(fname, "w"); |
| 50 | if (!f) { |
| 51 | perror(fname); |
| 52 | return; |
| 53 | } |
| 54 | fprintf(f, "P6\n" |
| 55 | "%d %d\n" |
| 56 | "%d\n", |
| 57 | w, h, 255); |
| 58 | for(y = 0; y < h; y++) { |
| 59 | for(x = 0; x < w; x++) { |
| 60 | v = rgba_palette[bitmap[y * w + x]]; |
| 61 | putc((v >> 16) & 0xff, f); |
| 62 | putc((v >> 8) & 0xff, f); |
| 63 | putc((v >> 0) & 0xff, f); |
| 64 | } |
| 65 | } |
| 66 | fclose(f); |
| 67 | |
| 68 | |
| 69 | snprintf(fname2, 40, "%s-a.pgm", filename); |
| 70 | |
| 71 | f = fopen(fname2, "w"); |
| 72 | if (!f) { |
| 73 | perror(fname2); |
| 74 | return; |
| 75 | } |
| 76 | fprintf(f, "P5\n" |
| 77 | "%d %d\n" |
| 78 | "%d\n", |
| 79 | w, h, 255); |
| 80 | for(y = 0; y < h; y++) { |
| 81 | for(x = 0; x < w; x++) { |
| 82 | v = rgba_palette[bitmap[y * w + x]]; |
| 83 | putc((v >> 24) & 0xff, f); |
| 84 | } |
| 85 | } |
| 86 | fclose(f); |
| 87 | |
| 88 | snprintf(command, 1024, "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename); |
| 89 | system(command); |
| 90 | |
| 91 | snprintf(command, 1024, "rm %s %s", fname, fname2); |
| 92 | system(command); |
| 93 | } |
| 94 | #endif |
| 95 | |
| 96 | static void png_save2(const char *filename, uint32_t *bitmap, int w, int h) |
| 97 | { |
| 98 | int x, y, v; |
| 99 | FILE *f; |
| 100 | char fname[40], fname2[40]; |
| 101 | char command[1024]; |
| 102 | |
| 103 | snprintf(fname, sizeof(fname), "%s.ppm", filename); |
| 104 | |
| 105 | f = fopen(fname, "w"); |
| 106 | if (!f) { |
| 107 | perror(fname); |
| 108 | return; |
| 109 | } |
| 110 | fprintf(f, "P6\n" |
| 111 | "%d %d\n" |
| 112 | "%d\n", |
| 113 | w, h, 255); |
| 114 | for(y = 0; y < h; y++) { |
| 115 | for(x = 0; x < w; x++) { |
| 116 | v = bitmap[y * w + x]; |
| 117 | putc((v >> 16) & 0xff, f); |
| 118 | putc((v >> 8) & 0xff, f); |
| 119 | putc((v >> 0) & 0xff, f); |
| 120 | } |
| 121 | } |
| 122 | fclose(f); |
| 123 | |
| 124 | |
| 125 | snprintf(fname2, sizeof(fname2), "%s-a.pgm", filename); |
| 126 | |
| 127 | f = fopen(fname2, "w"); |
| 128 | if (!f) { |
| 129 | perror(fname2); |
| 130 | return; |
| 131 | } |
| 132 | fprintf(f, "P5\n" |
| 133 | "%d %d\n" |
| 134 | "%d\n", |
| 135 | w, h, 255); |
| 136 | for(y = 0; y < h; y++) { |
| 137 | for(x = 0; x < w; x++) { |
| 138 | v = bitmap[y * w + x]; |
| 139 | putc((v >> 24) & 0xff, f); |
| 140 | } |
| 141 | } |
| 142 | fclose(f); |
| 143 | |
| 144 | snprintf(command, sizeof(command), "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename); |
| 145 | system(command); |
| 146 | |
| 147 | snprintf(command, sizeof(command), "rm %s %s", fname, fname2); |
| 148 | system(command); |
| 149 | } |
| 150 | #endif |
| 151 | |
| 152 | #define RGBA(r,g,b,a) (((unsigned)(a) << 24) | ((r) << 16) | ((g) << 8) | (b)) |
| 153 | |
| 154 | typedef struct DVBSubCLUT { |
| 155 | int id; |
| 156 | int version; |
| 157 | |
| 158 | uint32_t clut4[4]; |
| 159 | uint32_t clut16[16]; |
| 160 | uint32_t clut256[256]; |
| 161 | |
| 162 | struct DVBSubCLUT *next; |
| 163 | } DVBSubCLUT; |
| 164 | |
| 165 | static DVBSubCLUT default_clut; |
| 166 | |
| 167 | typedef struct DVBSubObjectDisplay { |
| 168 | int object_id; |
| 169 | int region_id; |
| 170 | |
| 171 | int x_pos; |
| 172 | int y_pos; |
| 173 | |
| 174 | int fgcolor; |
| 175 | int bgcolor; |
| 176 | |
| 177 | struct DVBSubObjectDisplay *region_list_next; |
| 178 | struct DVBSubObjectDisplay *object_list_next; |
| 179 | } DVBSubObjectDisplay; |
| 180 | |
| 181 | typedef struct DVBSubObject { |
| 182 | int id; |
| 183 | int version; |
| 184 | |
| 185 | int type; |
| 186 | |
| 187 | DVBSubObjectDisplay *display_list; |
| 188 | |
| 189 | struct DVBSubObject *next; |
| 190 | } DVBSubObject; |
| 191 | |
| 192 | typedef struct DVBSubRegionDisplay { |
| 193 | int region_id; |
| 194 | |
| 195 | int x_pos; |
| 196 | int y_pos; |
| 197 | |
| 198 | struct DVBSubRegionDisplay *next; |
| 199 | } DVBSubRegionDisplay; |
| 200 | |
| 201 | typedef struct DVBSubRegion { |
| 202 | int id; |
| 203 | int version; |
| 204 | |
| 205 | int width; |
| 206 | int height; |
| 207 | int depth; |
| 208 | |
| 209 | int clut; |
| 210 | int bgcolor; |
| 211 | |
| 212 | uint8_t *pbuf; |
| 213 | int buf_size; |
| 214 | int dirty; |
| 215 | |
| 216 | DVBSubObjectDisplay *display_list; |
| 217 | |
| 218 | struct DVBSubRegion *next; |
| 219 | } DVBSubRegion; |
| 220 | |
| 221 | typedef struct DVBSubDisplayDefinition { |
| 222 | int version; |
| 223 | |
| 224 | int x; |
| 225 | int y; |
| 226 | int width; |
| 227 | int height; |
| 228 | } DVBSubDisplayDefinition; |
| 229 | |
| 230 | typedef struct DVBSubContext { |
| 231 | AVClass *class; |
| 232 | int composition_id; |
| 233 | int ancillary_id; |
| 234 | |
| 235 | int version; |
| 236 | int time_out; |
| 237 | int compute_edt; /**< if 1 end display time calculated using pts |
| 238 | if 0 (Default) calculated using time out */ |
| 239 | int64_t prev_start; |
| 240 | DVBSubRegion *region_list; |
| 241 | DVBSubCLUT *clut_list; |
| 242 | DVBSubObject *object_list; |
| 243 | |
| 244 | DVBSubRegionDisplay *display_list; |
| 245 | DVBSubDisplayDefinition *display_definition; |
| 246 | } DVBSubContext; |
| 247 | |
| 248 | |
| 249 | static DVBSubObject* get_object(DVBSubContext *ctx, int object_id) |
| 250 | { |
| 251 | DVBSubObject *ptr = ctx->object_list; |
| 252 | |
| 253 | while (ptr && ptr->id != object_id) { |
| 254 | ptr = ptr->next; |
| 255 | } |
| 256 | |
| 257 | return ptr; |
| 258 | } |
| 259 | |
| 260 | static DVBSubCLUT* get_clut(DVBSubContext *ctx, int clut_id) |
| 261 | { |
| 262 | DVBSubCLUT *ptr = ctx->clut_list; |
| 263 | |
| 264 | while (ptr && ptr->id != clut_id) { |
| 265 | ptr = ptr->next; |
| 266 | } |
| 267 | |
| 268 | return ptr; |
| 269 | } |
| 270 | |
| 271 | static DVBSubRegion* get_region(DVBSubContext *ctx, int region_id) |
| 272 | { |
| 273 | DVBSubRegion *ptr = ctx->region_list; |
| 274 | |
| 275 | while (ptr && ptr->id != region_id) { |
| 276 | ptr = ptr->next; |
| 277 | } |
| 278 | |
| 279 | return ptr; |
| 280 | } |
| 281 | |
| 282 | static void delete_region_display_list(DVBSubContext *ctx, DVBSubRegion *region) |
| 283 | { |
| 284 | DVBSubObject *object, *obj2, **obj2_ptr; |
| 285 | DVBSubObjectDisplay *display, *obj_disp, **obj_disp_ptr; |
| 286 | |
| 287 | while (region->display_list) { |
| 288 | display = region->display_list; |
| 289 | |
| 290 | object = get_object(ctx, display->object_id); |
| 291 | |
| 292 | if (object) { |
| 293 | obj_disp_ptr = &object->display_list; |
| 294 | obj_disp = *obj_disp_ptr; |
| 295 | |
| 296 | while (obj_disp && obj_disp != display) { |
| 297 | obj_disp_ptr = &obj_disp->object_list_next; |
| 298 | obj_disp = *obj_disp_ptr; |
| 299 | } |
| 300 | |
| 301 | if (obj_disp) { |
| 302 | *obj_disp_ptr = obj_disp->object_list_next; |
| 303 | |
| 304 | if (!object->display_list) { |
| 305 | obj2_ptr = &ctx->object_list; |
| 306 | obj2 = *obj2_ptr; |
| 307 | |
| 308 | while (obj2 != object) { |
| 309 | assert(obj2); |
| 310 | obj2_ptr = &obj2->next; |
| 311 | obj2 = *obj2_ptr; |
| 312 | } |
| 313 | |
| 314 | *obj2_ptr = obj2->next; |
| 315 | |
| 316 | av_free(obj2); |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | region->display_list = display->region_list_next; |
| 322 | |
| 323 | av_free(display); |
| 324 | } |
| 325 | |
| 326 | } |
| 327 | |
| 328 | static void delete_cluts(DVBSubContext *ctx) |
| 329 | { |
| 330 | DVBSubCLUT *clut; |
| 331 | |
| 332 | while (ctx->clut_list) { |
| 333 | clut = ctx->clut_list; |
| 334 | |
| 335 | ctx->clut_list = clut->next; |
| 336 | |
| 337 | av_free(clut); |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | static void delete_objects(DVBSubContext *ctx) |
| 342 | { |
| 343 | DVBSubObject *object; |
| 344 | |
| 345 | while (ctx->object_list) { |
| 346 | object = ctx->object_list; |
| 347 | |
| 348 | ctx->object_list = object->next; |
| 349 | |
| 350 | av_free(object); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | static void delete_regions(DVBSubContext *ctx) |
| 355 | { |
| 356 | DVBSubRegion *region; |
| 357 | |
| 358 | while (ctx->region_list) { |
| 359 | region = ctx->region_list; |
| 360 | |
| 361 | ctx->region_list = region->next; |
| 362 | |
| 363 | delete_region_display_list(ctx, region); |
| 364 | |
| 365 | av_free(region->pbuf); |
| 366 | av_free(region); |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | static av_cold int dvbsub_init_decoder(AVCodecContext *avctx) |
| 371 | { |
| 372 | int i, r, g, b, a = 0; |
| 373 | DVBSubContext *ctx = avctx->priv_data; |
| 374 | |
| 375 | if (!avctx->extradata || (avctx->extradata_size < 4) || ((avctx->extradata_size % 5 != 0) && (avctx->extradata_size != 4))) { |
| 376 | av_log(avctx, AV_LOG_WARNING, "Invalid DVB subtitles stream extradata!\n"); |
| 377 | ctx->composition_id = -1; |
| 378 | ctx->ancillary_id = -1; |
| 379 | } else { |
| 380 | if (avctx->extradata_size > 5) { |
| 381 | av_log(avctx, AV_LOG_WARNING, "Decoding first DVB subtitles sub-stream\n"); |
| 382 | } |
| 383 | |
| 384 | ctx->composition_id = AV_RB16(avctx->extradata); |
| 385 | ctx->ancillary_id = AV_RB16(avctx->extradata + 2); |
| 386 | } |
| 387 | |
| 388 | ctx->version = -1; |
| 389 | ctx->prev_start = AV_NOPTS_VALUE; |
| 390 | |
| 391 | default_clut.id = -1; |
| 392 | default_clut.next = NULL; |
| 393 | |
| 394 | default_clut.clut4[0] = RGBA( 0, 0, 0, 0); |
| 395 | default_clut.clut4[1] = RGBA(255, 255, 255, 255); |
| 396 | default_clut.clut4[2] = RGBA( 0, 0, 0, 255); |
| 397 | default_clut.clut4[3] = RGBA(127, 127, 127, 255); |
| 398 | |
| 399 | default_clut.clut16[0] = RGBA( 0, 0, 0, 0); |
| 400 | for (i = 1; i < 16; i++) { |
| 401 | if (i < 8) { |
| 402 | r = (i & 1) ? 255 : 0; |
| 403 | g = (i & 2) ? 255 : 0; |
| 404 | b = (i & 4) ? 255 : 0; |
| 405 | } else { |
| 406 | r = (i & 1) ? 127 : 0; |
| 407 | g = (i & 2) ? 127 : 0; |
| 408 | b = (i & 4) ? 127 : 0; |
| 409 | } |
| 410 | default_clut.clut16[i] = RGBA(r, g, b, 255); |
| 411 | } |
| 412 | |
| 413 | default_clut.clut256[0] = RGBA( 0, 0, 0, 0); |
| 414 | for (i = 1; i < 256; i++) { |
| 415 | if (i < 8) { |
| 416 | r = (i & 1) ? 255 : 0; |
| 417 | g = (i & 2) ? 255 : 0; |
| 418 | b = (i & 4) ? 255 : 0; |
| 419 | a = 63; |
| 420 | } else { |
| 421 | switch (i & 0x88) { |
| 422 | case 0x00: |
| 423 | r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0); |
| 424 | g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0); |
| 425 | b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0); |
| 426 | a = 255; |
| 427 | break; |
| 428 | case 0x08: |
| 429 | r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0); |
| 430 | g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0); |
| 431 | b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0); |
| 432 | a = 127; |
| 433 | break; |
| 434 | case 0x80: |
| 435 | r = 127 + ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0); |
| 436 | g = 127 + ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0); |
| 437 | b = 127 + ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0); |
| 438 | a = 255; |
| 439 | break; |
| 440 | case 0x88: |
| 441 | r = ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0); |
| 442 | g = ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0); |
| 443 | b = ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0); |
| 444 | a = 255; |
| 445 | break; |
| 446 | } |
| 447 | } |
| 448 | default_clut.clut256[i] = RGBA(r, g, b, a); |
| 449 | } |
| 450 | |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | static av_cold int dvbsub_close_decoder(AVCodecContext *avctx) |
| 455 | { |
| 456 | DVBSubContext *ctx = avctx->priv_data; |
| 457 | DVBSubRegionDisplay *display; |
| 458 | |
| 459 | delete_regions(ctx); |
| 460 | |
| 461 | delete_objects(ctx); |
| 462 | |
| 463 | delete_cluts(ctx); |
| 464 | |
| 465 | av_freep(&ctx->display_definition); |
| 466 | |
| 467 | while (ctx->display_list) { |
| 468 | display = ctx->display_list; |
| 469 | ctx->display_list = display->next; |
| 470 | |
| 471 | av_free(display); |
| 472 | } |
| 473 | |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | static int dvbsub_read_2bit_string(uint8_t *destbuf, int dbuf_len, |
| 478 | const uint8_t **srcbuf, int buf_size, |
| 479 | int non_mod, uint8_t *map_table, int x_pos) |
| 480 | { |
| 481 | GetBitContext gb; |
| 482 | |
| 483 | int bits; |
| 484 | int run_length; |
| 485 | int pixels_read = x_pos; |
| 486 | |
| 487 | init_get_bits(&gb, *srcbuf, buf_size << 3); |
| 488 | |
| 489 | destbuf += x_pos; |
| 490 | |
| 491 | while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) { |
| 492 | bits = get_bits(&gb, 2); |
| 493 | |
| 494 | if (bits) { |
| 495 | if (non_mod != 1 || bits != 1) { |
| 496 | if (map_table) |
| 497 | *destbuf++ = map_table[bits]; |
| 498 | else |
| 499 | *destbuf++ = bits; |
| 500 | } |
| 501 | pixels_read++; |
| 502 | } else { |
| 503 | bits = get_bits1(&gb); |
| 504 | if (bits == 1) { |
| 505 | run_length = get_bits(&gb, 3) + 3; |
| 506 | bits = get_bits(&gb, 2); |
| 507 | |
| 508 | if (non_mod == 1 && bits == 1) |
| 509 | pixels_read += run_length; |
| 510 | else { |
| 511 | if (map_table) |
| 512 | bits = map_table[bits]; |
| 513 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 514 | *destbuf++ = bits; |
| 515 | pixels_read++; |
| 516 | } |
| 517 | } |
| 518 | } else { |
| 519 | bits = get_bits1(&gb); |
| 520 | if (bits == 0) { |
| 521 | bits = get_bits(&gb, 2); |
| 522 | if (bits == 2) { |
| 523 | run_length = get_bits(&gb, 4) + 12; |
| 524 | bits = get_bits(&gb, 2); |
| 525 | |
| 526 | if (non_mod == 1 && bits == 1) |
| 527 | pixels_read += run_length; |
| 528 | else { |
| 529 | if (map_table) |
| 530 | bits = map_table[bits]; |
| 531 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 532 | *destbuf++ = bits; |
| 533 | pixels_read++; |
| 534 | } |
| 535 | } |
| 536 | } else if (bits == 3) { |
| 537 | run_length = get_bits(&gb, 8) + 29; |
| 538 | bits = get_bits(&gb, 2); |
| 539 | |
| 540 | if (non_mod == 1 && bits == 1) |
| 541 | pixels_read += run_length; |
| 542 | else { |
| 543 | if (map_table) |
| 544 | bits = map_table[bits]; |
| 545 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 546 | *destbuf++ = bits; |
| 547 | pixels_read++; |
| 548 | } |
| 549 | } |
| 550 | } else if (bits == 1) { |
| 551 | if (map_table) |
| 552 | bits = map_table[0]; |
| 553 | else |
| 554 | bits = 0; |
| 555 | run_length = 2; |
| 556 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 557 | *destbuf++ = bits; |
| 558 | pixels_read++; |
| 559 | } |
| 560 | } else { |
| 561 | (*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 562 | return pixels_read; |
| 563 | } |
| 564 | } else { |
| 565 | if (map_table) |
| 566 | bits = map_table[0]; |
| 567 | else |
| 568 | bits = 0; |
| 569 | *destbuf++ = bits; |
| 570 | pixels_read++; |
| 571 | } |
| 572 | } |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | if (get_bits(&gb, 6)) |
| 577 | av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 578 | |
| 579 | (*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 580 | |
| 581 | return pixels_read; |
| 582 | } |
| 583 | |
| 584 | static int dvbsub_read_4bit_string(uint8_t *destbuf, int dbuf_len, |
| 585 | const uint8_t **srcbuf, int buf_size, |
| 586 | int non_mod, uint8_t *map_table, int x_pos) |
| 587 | { |
| 588 | GetBitContext gb; |
| 589 | |
| 590 | int bits; |
| 591 | int run_length; |
| 592 | int pixels_read = x_pos; |
| 593 | |
| 594 | init_get_bits(&gb, *srcbuf, buf_size << 3); |
| 595 | |
| 596 | destbuf += x_pos; |
| 597 | |
| 598 | while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) { |
| 599 | bits = get_bits(&gb, 4); |
| 600 | |
| 601 | if (bits) { |
| 602 | if (non_mod != 1 || bits != 1) { |
| 603 | if (map_table) |
| 604 | *destbuf++ = map_table[bits]; |
| 605 | else |
| 606 | *destbuf++ = bits; |
| 607 | } |
| 608 | pixels_read++; |
| 609 | } else { |
| 610 | bits = get_bits1(&gb); |
| 611 | if (bits == 0) { |
| 612 | run_length = get_bits(&gb, 3); |
| 613 | |
| 614 | if (run_length == 0) { |
| 615 | (*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 616 | return pixels_read; |
| 617 | } |
| 618 | |
| 619 | run_length += 2; |
| 620 | |
| 621 | if (map_table) |
| 622 | bits = map_table[0]; |
| 623 | else |
| 624 | bits = 0; |
| 625 | |
| 626 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 627 | *destbuf++ = bits; |
| 628 | pixels_read++; |
| 629 | } |
| 630 | } else { |
| 631 | bits = get_bits1(&gb); |
| 632 | if (bits == 0) { |
| 633 | run_length = get_bits(&gb, 2) + 4; |
| 634 | bits = get_bits(&gb, 4); |
| 635 | |
| 636 | if (non_mod == 1 && bits == 1) |
| 637 | pixels_read += run_length; |
| 638 | else { |
| 639 | if (map_table) |
| 640 | bits = map_table[bits]; |
| 641 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 642 | *destbuf++ = bits; |
| 643 | pixels_read++; |
| 644 | } |
| 645 | } |
| 646 | } else { |
| 647 | bits = get_bits(&gb, 2); |
| 648 | if (bits == 2) { |
| 649 | run_length = get_bits(&gb, 4) + 9; |
| 650 | bits = get_bits(&gb, 4); |
| 651 | |
| 652 | if (non_mod == 1 && bits == 1) |
| 653 | pixels_read += run_length; |
| 654 | else { |
| 655 | if (map_table) |
| 656 | bits = map_table[bits]; |
| 657 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 658 | *destbuf++ = bits; |
| 659 | pixels_read++; |
| 660 | } |
| 661 | } |
| 662 | } else if (bits == 3) { |
| 663 | run_length = get_bits(&gb, 8) + 25; |
| 664 | bits = get_bits(&gb, 4); |
| 665 | |
| 666 | if (non_mod == 1 && bits == 1) |
| 667 | pixels_read += run_length; |
| 668 | else { |
| 669 | if (map_table) |
| 670 | bits = map_table[bits]; |
| 671 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 672 | *destbuf++ = bits; |
| 673 | pixels_read++; |
| 674 | } |
| 675 | } |
| 676 | } else if (bits == 1) { |
| 677 | if (map_table) |
| 678 | bits = map_table[0]; |
| 679 | else |
| 680 | bits = 0; |
| 681 | run_length = 2; |
| 682 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 683 | *destbuf++ = bits; |
| 684 | pixels_read++; |
| 685 | } |
| 686 | } else { |
| 687 | if (map_table) |
| 688 | bits = map_table[0]; |
| 689 | else |
| 690 | bits = 0; |
| 691 | *destbuf++ = bits; |
| 692 | pixels_read ++; |
| 693 | } |
| 694 | } |
| 695 | } |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | if (get_bits(&gb, 8)) |
| 700 | av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 701 | |
| 702 | (*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 703 | |
| 704 | return pixels_read; |
| 705 | } |
| 706 | |
| 707 | static int dvbsub_read_8bit_string(uint8_t *destbuf, int dbuf_len, |
| 708 | const uint8_t **srcbuf, int buf_size, |
| 709 | int non_mod, uint8_t *map_table, int x_pos) |
| 710 | { |
| 711 | const uint8_t *sbuf_end = (*srcbuf) + buf_size; |
| 712 | int bits; |
| 713 | int run_length; |
| 714 | int pixels_read = x_pos; |
| 715 | |
| 716 | destbuf += x_pos; |
| 717 | |
| 718 | while (*srcbuf < sbuf_end && pixels_read < dbuf_len) { |
| 719 | bits = *(*srcbuf)++; |
| 720 | |
| 721 | if (bits) { |
| 722 | if (non_mod != 1 || bits != 1) { |
| 723 | if (map_table) |
| 724 | *destbuf++ = map_table[bits]; |
| 725 | else |
| 726 | *destbuf++ = bits; |
| 727 | } |
| 728 | pixels_read++; |
| 729 | } else { |
| 730 | bits = *(*srcbuf)++; |
| 731 | run_length = bits & 0x7f; |
| 732 | if ((bits & 0x80) == 0) { |
| 733 | if (run_length == 0) { |
| 734 | return pixels_read; |
| 735 | } |
| 736 | |
| 737 | if (map_table) |
| 738 | bits = map_table[0]; |
| 739 | else |
| 740 | bits = 0; |
| 741 | while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 742 | *destbuf++ = bits; |
| 743 | pixels_read++; |
| 744 | } |
| 745 | } else { |
| 746 | bits = *(*srcbuf)++; |
| 747 | |
| 748 | if (non_mod == 1 && bits == 1) |
| 749 | pixels_read += run_length; |
| 750 | if (map_table) |
| 751 | bits = map_table[bits]; |
| 752 | else while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 753 | *destbuf++ = bits; |
| 754 | pixels_read++; |
| 755 | } |
| 756 | } |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | if (*(*srcbuf)++) |
| 761 | av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 762 | |
| 763 | return pixels_read; |
| 764 | } |
| 765 | |
| 766 | static void save_subtitle_set(AVCodecContext *avctx, AVSubtitle *sub, int *got_output) |
| 767 | { |
| 768 | DVBSubContext *ctx = avctx->priv_data; |
| 769 | DVBSubRegionDisplay *display; |
| 770 | DVBSubDisplayDefinition *display_def = ctx->display_definition; |
| 771 | DVBSubRegion *region; |
| 772 | AVSubtitleRect *rect; |
| 773 | DVBSubCLUT *clut; |
| 774 | uint32_t *clut_table; |
| 775 | int i; |
| 776 | int offset_x=0, offset_y=0; |
| 777 | |
| 778 | |
| 779 | if (display_def) { |
| 780 | offset_x = display_def->x; |
| 781 | offset_y = display_def->y; |
| 782 | } |
| 783 | |
| 784 | /* Not touching AVSubtitles again*/ |
| 785 | if(sub->num_rects) { |
| 786 | avpriv_request_sample(ctx, "Different Version of Segment asked Twice\n"); |
| 787 | return; |
| 788 | } |
| 789 | for (display = ctx->display_list; display; display = display->next) { |
| 790 | region = get_region(ctx, display->region_id); |
| 791 | if (region && region->dirty) |
| 792 | sub->num_rects++; |
| 793 | } |
| 794 | |
| 795 | if(ctx->compute_edt == 0) { |
| 796 | sub->end_display_time = ctx->time_out * 1000; |
| 797 | *got_output = 1; |
| 798 | } else if (ctx->prev_start != AV_NOPTS_VALUE) { |
| 799 | sub->end_display_time = av_rescale_q((sub->pts - ctx->prev_start ), AV_TIME_BASE_Q, (AVRational){ 1, 1000 }) - 1; |
| 800 | *got_output = 1; |
| 801 | } |
| 802 | if (sub->num_rects > 0) { |
| 803 | |
| 804 | sub->rects = av_mallocz_array(sizeof(*sub->rects), sub->num_rects); |
| 805 | for(i=0; i<sub->num_rects; i++) |
| 806 | sub->rects[i] = av_mallocz(sizeof(*sub->rects[i])); |
| 807 | |
| 808 | i = 0; |
| 809 | |
| 810 | for (display = ctx->display_list; display; display = display->next) { |
| 811 | region = get_region(ctx, display->region_id); |
| 812 | |
| 813 | if (!region) |
| 814 | continue; |
| 815 | |
| 816 | if (!region->dirty) |
| 817 | continue; |
| 818 | |
| 819 | rect = sub->rects[i]; |
| 820 | rect->x = display->x_pos + offset_x; |
| 821 | rect->y = display->y_pos + offset_y; |
| 822 | rect->w = region->width; |
| 823 | rect->h = region->height; |
| 824 | rect->nb_colors = (1 << region->depth); |
| 825 | rect->type = SUBTITLE_BITMAP; |
| 826 | rect->pict.linesize[0] = region->width; |
| 827 | |
| 828 | clut = get_clut(ctx, region->clut); |
| 829 | |
| 830 | if (!clut) |
| 831 | clut = &default_clut; |
| 832 | |
| 833 | switch (region->depth) { |
| 834 | case 2: |
| 835 | clut_table = clut->clut4; |
| 836 | break; |
| 837 | case 8: |
| 838 | clut_table = clut->clut256; |
| 839 | break; |
| 840 | case 4: |
| 841 | default: |
| 842 | clut_table = clut->clut16; |
| 843 | break; |
| 844 | } |
| 845 | |
| 846 | rect->pict.data[1] = av_mallocz(AVPALETTE_SIZE); |
| 847 | memcpy(rect->pict.data[1], clut_table, (1 << region->depth) * sizeof(uint32_t)); |
| 848 | |
| 849 | rect->pict.data[0] = av_malloc(region->buf_size); |
| 850 | memcpy(rect->pict.data[0], region->pbuf, region->buf_size); |
| 851 | |
| 852 | i++; |
| 853 | } |
| 854 | } |
| 855 | } |
| 856 | |
| 857 | static void dvbsub_parse_pixel_data_block(AVCodecContext *avctx, DVBSubObjectDisplay *display, |
| 858 | const uint8_t *buf, int buf_size, int top_bottom, int non_mod) |
| 859 | { |
| 860 | DVBSubContext *ctx = avctx->priv_data; |
| 861 | |
| 862 | DVBSubRegion *region = get_region(ctx, display->region_id); |
| 863 | const uint8_t *buf_end = buf + buf_size; |
| 864 | uint8_t *pbuf; |
| 865 | int x_pos, y_pos; |
| 866 | int i; |
| 867 | |
| 868 | uint8_t map2to4[] = { 0x0, 0x7, 0x8, 0xf}; |
| 869 | uint8_t map2to8[] = {0x00, 0x77, 0x88, 0xff}; |
| 870 | uint8_t map4to8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, |
| 871 | 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}; |
| 872 | uint8_t *map_table; |
| 873 | |
| 874 | #if 0 |
| 875 | av_dlog(avctx, "DVB pixel block size %d, %s field:\n", buf_size, |
| 876 | top_bottom ? "bottom" : "top"); |
| 877 | |
| 878 | for (i = 0; i < buf_size; i++) { |
| 879 | if (i % 16 == 0) |
| 880 | av_dlog(avctx, "0x%8p: ", buf+i); |
| 881 | |
| 882 | av_dlog(avctx, "%02x ", buf[i]); |
| 883 | if (i % 16 == 15) |
| 884 | av_dlog(avctx, "\n"); |
| 885 | } |
| 886 | |
| 887 | if (i % 16) |
| 888 | av_dlog(avctx, "\n"); |
| 889 | #endif |
| 890 | |
| 891 | if (!region) |
| 892 | return; |
| 893 | |
| 894 | pbuf = region->pbuf; |
| 895 | region->dirty = 1; |
| 896 | |
| 897 | x_pos = display->x_pos; |
| 898 | y_pos = display->y_pos; |
| 899 | |
| 900 | y_pos += top_bottom; |
| 901 | |
| 902 | while (buf < buf_end) { |
| 903 | if ((*buf!=0xf0 && x_pos >= region->width) || y_pos >= region->height) { |
| 904 | av_log(avctx, AV_LOG_ERROR, "Invalid object location! %d-%d %d-%d %02x\n", x_pos, region->width, y_pos, region->height, *buf); |
| 905 | return; |
| 906 | } |
| 907 | |
| 908 | switch (*buf++) { |
| 909 | case 0x10: |
| 910 | if (region->depth == 8) |
| 911 | map_table = map2to8; |
| 912 | else if (region->depth == 4) |
| 913 | map_table = map2to4; |
| 914 | else |
| 915 | map_table = NULL; |
| 916 | |
| 917 | x_pos = dvbsub_read_2bit_string(pbuf + (y_pos * region->width), |
| 918 | region->width, &buf, buf_end - buf, |
| 919 | non_mod, map_table, x_pos); |
| 920 | break; |
| 921 | case 0x11: |
| 922 | if (region->depth < 4) { |
| 923 | av_log(avctx, AV_LOG_ERROR, "4-bit pixel string in %d-bit region!\n", region->depth); |
| 924 | return; |
| 925 | } |
| 926 | |
| 927 | if (region->depth == 8) |
| 928 | map_table = map4to8; |
| 929 | else |
| 930 | map_table = NULL; |
| 931 | |
| 932 | x_pos = dvbsub_read_4bit_string(pbuf + (y_pos * region->width), |
| 933 | region->width, &buf, buf_end - buf, |
| 934 | non_mod, map_table, x_pos); |
| 935 | break; |
| 936 | case 0x12: |
| 937 | if (region->depth < 8) { |
| 938 | av_log(avctx, AV_LOG_ERROR, "8-bit pixel string in %d-bit region!\n", region->depth); |
| 939 | return; |
| 940 | } |
| 941 | |
| 942 | x_pos = dvbsub_read_8bit_string(pbuf + (y_pos * region->width), |
| 943 | region->width, &buf, buf_end - buf, |
| 944 | non_mod, NULL, x_pos); |
| 945 | break; |
| 946 | |
| 947 | case 0x20: |
| 948 | map2to4[0] = (*buf) >> 4; |
| 949 | map2to4[1] = (*buf++) & 0xf; |
| 950 | map2to4[2] = (*buf) >> 4; |
| 951 | map2to4[3] = (*buf++) & 0xf; |
| 952 | break; |
| 953 | case 0x21: |
| 954 | for (i = 0; i < 4; i++) |
| 955 | map2to8[i] = *buf++; |
| 956 | break; |
| 957 | case 0x22: |
| 958 | for (i = 0; i < 16; i++) |
| 959 | map4to8[i] = *buf++; |
| 960 | break; |
| 961 | |
| 962 | case 0xf0: |
| 963 | x_pos = display->x_pos; |
| 964 | y_pos += 2; |
| 965 | break; |
| 966 | default: |
| 967 | av_log(avctx, AV_LOG_INFO, "Unknown/unsupported pixel block 0x%x\n", *(buf-1)); |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | } |
| 972 | |
| 973 | static void dvbsub_parse_object_segment(AVCodecContext *avctx, |
| 974 | const uint8_t *buf, int buf_size) |
| 975 | { |
| 976 | DVBSubContext *ctx = avctx->priv_data; |
| 977 | |
| 978 | const uint8_t *buf_end = buf + buf_size; |
| 979 | int object_id; |
| 980 | DVBSubObject *object; |
| 981 | DVBSubObjectDisplay *display; |
| 982 | int top_field_len, bottom_field_len; |
| 983 | |
| 984 | int coding_method, non_modifying_color; |
| 985 | |
| 986 | object_id = AV_RB16(buf); |
| 987 | buf += 2; |
| 988 | |
| 989 | object = get_object(ctx, object_id); |
| 990 | |
| 991 | if (!object) |
| 992 | return; |
| 993 | |
| 994 | coding_method = ((*buf) >> 2) & 3; |
| 995 | non_modifying_color = ((*buf++) >> 1) & 1; |
| 996 | |
| 997 | if (coding_method == 0) { |
| 998 | top_field_len = AV_RB16(buf); |
| 999 | buf += 2; |
| 1000 | bottom_field_len = AV_RB16(buf); |
| 1001 | buf += 2; |
| 1002 | |
| 1003 | if (buf + top_field_len + bottom_field_len > buf_end) { |
| 1004 | av_log(avctx, AV_LOG_ERROR, "Field data size too large\n"); |
| 1005 | return; |
| 1006 | } |
| 1007 | |
| 1008 | for (display = object->display_list; display; display = display->object_list_next) { |
| 1009 | const uint8_t *block = buf; |
| 1010 | int bfl = bottom_field_len; |
| 1011 | |
| 1012 | dvbsub_parse_pixel_data_block(avctx, display, block, top_field_len, 0, |
| 1013 | non_modifying_color); |
| 1014 | |
| 1015 | if (bottom_field_len > 0) |
| 1016 | block = buf + top_field_len; |
| 1017 | else |
| 1018 | bfl = top_field_len; |
| 1019 | |
| 1020 | dvbsub_parse_pixel_data_block(avctx, display, block, bfl, 1, |
| 1021 | non_modifying_color); |
| 1022 | } |
| 1023 | |
| 1024 | /* } else if (coding_method == 1) {*/ |
| 1025 | |
| 1026 | } else { |
| 1027 | av_log(avctx, AV_LOG_ERROR, "Unknown object coding %d\n", coding_method); |
| 1028 | } |
| 1029 | |
| 1030 | } |
| 1031 | |
| 1032 | static int dvbsub_parse_clut_segment(AVCodecContext *avctx, |
| 1033 | const uint8_t *buf, int buf_size) |
| 1034 | { |
| 1035 | DVBSubContext *ctx = avctx->priv_data; |
| 1036 | |
| 1037 | const uint8_t *buf_end = buf + buf_size; |
| 1038 | int i, clut_id; |
| 1039 | int version; |
| 1040 | DVBSubCLUT *clut; |
| 1041 | int entry_id, depth , full_range; |
| 1042 | int y, cr, cb, alpha; |
| 1043 | int r, g, b, r_add, g_add, b_add; |
| 1044 | |
| 1045 | av_dlog(avctx, "DVB clut packet:\n"); |
| 1046 | |
| 1047 | for (i=0; i < buf_size; i++) { |
| 1048 | av_dlog(avctx, "%02x ", buf[i]); |
| 1049 | if (i % 16 == 15) |
| 1050 | av_dlog(avctx, "\n"); |
| 1051 | } |
| 1052 | |
| 1053 | if (i % 16) |
| 1054 | av_dlog(avctx, "\n"); |
| 1055 | |
| 1056 | clut_id = *buf++; |
| 1057 | version = ((*buf)>>4)&15; |
| 1058 | buf += 1; |
| 1059 | |
| 1060 | clut = get_clut(ctx, clut_id); |
| 1061 | |
| 1062 | if (!clut) { |
| 1063 | clut = av_malloc(sizeof(DVBSubCLUT)); |
| 1064 | |
| 1065 | memcpy(clut, &default_clut, sizeof(DVBSubCLUT)); |
| 1066 | |
| 1067 | clut->id = clut_id; |
| 1068 | clut->version = -1; |
| 1069 | |
| 1070 | clut->next = ctx->clut_list; |
| 1071 | ctx->clut_list = clut; |
| 1072 | } |
| 1073 | |
| 1074 | if (clut->version != version) { |
| 1075 | |
| 1076 | clut->version = version; |
| 1077 | |
| 1078 | while (buf + 4 < buf_end) { |
| 1079 | entry_id = *buf++; |
| 1080 | |
| 1081 | depth = (*buf) & 0xe0; |
| 1082 | |
| 1083 | if (depth == 0) { |
| 1084 | av_log(avctx, AV_LOG_ERROR, "Invalid clut depth 0x%x!\n", *buf); |
| 1085 | return 0; |
| 1086 | } |
| 1087 | |
| 1088 | full_range = (*buf++) & 1; |
| 1089 | |
| 1090 | if (full_range) { |
| 1091 | y = *buf++; |
| 1092 | cr = *buf++; |
| 1093 | cb = *buf++; |
| 1094 | alpha = *buf++; |
| 1095 | } else { |
| 1096 | y = buf[0] & 0xfc; |
| 1097 | cr = (((buf[0] & 3) << 2) | ((buf[1] >> 6) & 3)) << 4; |
| 1098 | cb = (buf[1] << 2) & 0xf0; |
| 1099 | alpha = (buf[1] << 6) & 0xc0; |
| 1100 | |
| 1101 | buf += 2; |
| 1102 | } |
| 1103 | |
| 1104 | if (y == 0) |
| 1105 | alpha = 0xff; |
| 1106 | |
| 1107 | YUV_TO_RGB1_CCIR(cb, cr); |
| 1108 | YUV_TO_RGB2_CCIR(r, g, b, y); |
| 1109 | |
| 1110 | av_dlog(avctx, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha); |
| 1111 | if (!!(depth & 0x80) + !!(depth & 0x40) + !!(depth & 0x20) > 1) { |
| 1112 | av_dlog(avctx, "More than one bit level marked: %x\n", depth); |
| 1113 | if (avctx->strict_std_compliance > FF_COMPLIANCE_NORMAL) |
| 1114 | return AVERROR_INVALIDDATA; |
| 1115 | } |
| 1116 | |
| 1117 | if (depth & 0x80) |
| 1118 | clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha); |
| 1119 | else if (depth & 0x40) |
| 1120 | clut->clut16[entry_id] = RGBA(r,g,b,255 - alpha); |
| 1121 | else if (depth & 0x20) |
| 1122 | clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha); |
| 1123 | } |
| 1124 | } |
| 1125 | return 0; |
| 1126 | } |
| 1127 | |
| 1128 | |
| 1129 | static void dvbsub_parse_region_segment(AVCodecContext *avctx, |
| 1130 | const uint8_t *buf, int buf_size) |
| 1131 | { |
| 1132 | DVBSubContext *ctx = avctx->priv_data; |
| 1133 | |
| 1134 | const uint8_t *buf_end = buf + buf_size; |
| 1135 | int region_id, object_id; |
| 1136 | int av_unused version; |
| 1137 | DVBSubRegion *region; |
| 1138 | DVBSubObject *object; |
| 1139 | DVBSubObjectDisplay *display; |
| 1140 | int fill; |
| 1141 | |
| 1142 | if (buf_size < 10) |
| 1143 | return; |
| 1144 | |
| 1145 | region_id = *buf++; |
| 1146 | |
| 1147 | region = get_region(ctx, region_id); |
| 1148 | |
| 1149 | if (!region) { |
| 1150 | region = av_mallocz(sizeof(DVBSubRegion)); |
| 1151 | |
| 1152 | region->id = region_id; |
| 1153 | region->version = -1; |
| 1154 | |
| 1155 | region->next = ctx->region_list; |
| 1156 | ctx->region_list = region; |
| 1157 | } |
| 1158 | |
| 1159 | version = ((*buf)>>4) & 15; |
| 1160 | fill = ((*buf++) >> 3) & 1; |
| 1161 | |
| 1162 | region->width = AV_RB16(buf); |
| 1163 | buf += 2; |
| 1164 | region->height = AV_RB16(buf); |
| 1165 | buf += 2; |
| 1166 | |
| 1167 | if (region->width * region->height != region->buf_size) { |
| 1168 | av_free(region->pbuf); |
| 1169 | |
| 1170 | region->buf_size = region->width * region->height; |
| 1171 | |
| 1172 | region->pbuf = av_malloc(region->buf_size); |
| 1173 | |
| 1174 | fill = 1; |
| 1175 | region->dirty = 0; |
| 1176 | } |
| 1177 | |
| 1178 | region->depth = 1 << (((*buf++) >> 2) & 7); |
| 1179 | if(region->depth<2 || region->depth>8){ |
| 1180 | av_log(avctx, AV_LOG_ERROR, "region depth %d is invalid\n", region->depth); |
| 1181 | region->depth= 4; |
| 1182 | } |
| 1183 | region->clut = *buf++; |
| 1184 | |
| 1185 | if (region->depth == 8) { |
| 1186 | region->bgcolor = *buf++; |
| 1187 | buf += 1; |
| 1188 | } else { |
| 1189 | buf += 1; |
| 1190 | |
| 1191 | if (region->depth == 4) |
| 1192 | region->bgcolor = (((*buf++) >> 4) & 15); |
| 1193 | else |
| 1194 | region->bgcolor = (((*buf++) >> 2) & 3); |
| 1195 | } |
| 1196 | |
| 1197 | av_dlog(avctx, "Region %d, (%dx%d)\n", region_id, region->width, region->height); |
| 1198 | |
| 1199 | if (fill) { |
| 1200 | memset(region->pbuf, region->bgcolor, region->buf_size); |
| 1201 | av_dlog(avctx, "Fill region (%d)\n", region->bgcolor); |
| 1202 | } |
| 1203 | |
| 1204 | delete_region_display_list(ctx, region); |
| 1205 | |
| 1206 | while (buf + 5 < buf_end) { |
| 1207 | object_id = AV_RB16(buf); |
| 1208 | buf += 2; |
| 1209 | |
| 1210 | object = get_object(ctx, object_id); |
| 1211 | |
| 1212 | if (!object) { |
| 1213 | object = av_mallocz(sizeof(DVBSubObject)); |
| 1214 | |
| 1215 | object->id = object_id; |
| 1216 | object->next = ctx->object_list; |
| 1217 | ctx->object_list = object; |
| 1218 | } |
| 1219 | |
| 1220 | object->type = (*buf) >> 6; |
| 1221 | |
| 1222 | display = av_mallocz(sizeof(DVBSubObjectDisplay)); |
| 1223 | |
| 1224 | display->object_id = object_id; |
| 1225 | display->region_id = region_id; |
| 1226 | |
| 1227 | display->x_pos = AV_RB16(buf) & 0xfff; |
| 1228 | buf += 2; |
| 1229 | display->y_pos = AV_RB16(buf) & 0xfff; |
| 1230 | buf += 2; |
| 1231 | |
| 1232 | if ((object->type == 1 || object->type == 2) && buf+1 < buf_end) { |
| 1233 | display->fgcolor = *buf++; |
| 1234 | display->bgcolor = *buf++; |
| 1235 | } |
| 1236 | |
| 1237 | display->region_list_next = region->display_list; |
| 1238 | region->display_list = display; |
| 1239 | |
| 1240 | display->object_list_next = object->display_list; |
| 1241 | object->display_list = display; |
| 1242 | } |
| 1243 | } |
| 1244 | |
| 1245 | static void dvbsub_parse_page_segment(AVCodecContext *avctx, |
| 1246 | const uint8_t *buf, int buf_size, AVSubtitle *sub, int *got_output) |
| 1247 | { |
| 1248 | DVBSubContext *ctx = avctx->priv_data; |
| 1249 | DVBSubRegionDisplay *display; |
| 1250 | DVBSubRegionDisplay *tmp_display_list, **tmp_ptr; |
| 1251 | |
| 1252 | const uint8_t *buf_end = buf + buf_size; |
| 1253 | int region_id; |
| 1254 | int page_state; |
| 1255 | int timeout; |
| 1256 | int version; |
| 1257 | |
| 1258 | if (buf_size < 1) |
| 1259 | return; |
| 1260 | |
| 1261 | timeout = *buf++; |
| 1262 | version = ((*buf)>>4) & 15; |
| 1263 | page_state = ((*buf++) >> 2) & 3; |
| 1264 | |
| 1265 | if (ctx->version == version) { |
| 1266 | return; |
| 1267 | } |
| 1268 | |
| 1269 | ctx->time_out = timeout; |
| 1270 | ctx->version = version; |
| 1271 | |
| 1272 | av_dlog(avctx, "Page time out %ds, state %d\n", ctx->time_out, page_state); |
| 1273 | |
| 1274 | if(ctx->compute_edt == 1) |
| 1275 | save_subtitle_set(avctx, sub, got_output); |
| 1276 | |
| 1277 | if (page_state == 1 || page_state == 2) { |
| 1278 | delete_regions(ctx); |
| 1279 | delete_objects(ctx); |
| 1280 | delete_cluts(ctx); |
| 1281 | } |
| 1282 | |
| 1283 | tmp_display_list = ctx->display_list; |
| 1284 | ctx->display_list = NULL; |
| 1285 | |
| 1286 | while (buf + 5 < buf_end) { |
| 1287 | region_id = *buf++; |
| 1288 | buf += 1; |
| 1289 | |
| 1290 | display = tmp_display_list; |
| 1291 | tmp_ptr = &tmp_display_list; |
| 1292 | |
| 1293 | while (display && display->region_id != region_id) { |
| 1294 | tmp_ptr = &display->next; |
| 1295 | display = display->next; |
| 1296 | } |
| 1297 | |
| 1298 | if (!display) |
| 1299 | display = av_mallocz(sizeof(DVBSubRegionDisplay)); |
| 1300 | |
| 1301 | display->region_id = region_id; |
| 1302 | |
| 1303 | display->x_pos = AV_RB16(buf); |
| 1304 | buf += 2; |
| 1305 | display->y_pos = AV_RB16(buf); |
| 1306 | buf += 2; |
| 1307 | |
| 1308 | *tmp_ptr = display->next; |
| 1309 | |
| 1310 | display->next = ctx->display_list; |
| 1311 | ctx->display_list = display; |
| 1312 | |
| 1313 | av_dlog(avctx, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos); |
| 1314 | } |
| 1315 | |
| 1316 | while (tmp_display_list) { |
| 1317 | display = tmp_display_list; |
| 1318 | |
| 1319 | tmp_display_list = display->next; |
| 1320 | |
| 1321 | av_free(display); |
| 1322 | } |
| 1323 | |
| 1324 | } |
| 1325 | |
| 1326 | |
| 1327 | #ifdef DEBUG |
| 1328 | static void save_display_set(DVBSubContext *ctx) |
| 1329 | { |
| 1330 | DVBSubRegion *region; |
| 1331 | DVBSubRegionDisplay *display; |
| 1332 | DVBSubCLUT *clut; |
| 1333 | uint32_t *clut_table; |
| 1334 | int x_pos, y_pos, width, height; |
| 1335 | int x, y, y_off, x_off; |
| 1336 | uint32_t *pbuf; |
| 1337 | char filename[32]; |
| 1338 | static int fileno_index = 0; |
| 1339 | |
| 1340 | x_pos = -1; |
| 1341 | y_pos = -1; |
| 1342 | width = 0; |
| 1343 | height = 0; |
| 1344 | |
| 1345 | for (display = ctx->display_list; display; display = display->next) { |
| 1346 | region = get_region(ctx, display->region_id); |
| 1347 | |
| 1348 | if (x_pos == -1) { |
| 1349 | x_pos = display->x_pos; |
| 1350 | y_pos = display->y_pos; |
| 1351 | width = region->width; |
| 1352 | height = region->height; |
| 1353 | } else { |
| 1354 | if (display->x_pos < x_pos) { |
| 1355 | width += (x_pos - display->x_pos); |
| 1356 | x_pos = display->x_pos; |
| 1357 | } |
| 1358 | |
| 1359 | if (display->y_pos < y_pos) { |
| 1360 | height += (y_pos - display->y_pos); |
| 1361 | y_pos = display->y_pos; |
| 1362 | } |
| 1363 | |
| 1364 | if (display->x_pos + region->width > x_pos + width) { |
| 1365 | width = display->x_pos + region->width - x_pos; |
| 1366 | } |
| 1367 | |
| 1368 | if (display->y_pos + region->height > y_pos + height) { |
| 1369 | height = display->y_pos + region->height - y_pos; |
| 1370 | } |
| 1371 | } |
| 1372 | } |
| 1373 | |
| 1374 | if (x_pos >= 0) { |
| 1375 | |
| 1376 | pbuf = av_malloc(width * height * 4); |
| 1377 | |
| 1378 | for (display = ctx->display_list; display; display = display->next) { |
| 1379 | region = get_region(ctx, display->region_id); |
| 1380 | |
| 1381 | x_off = display->x_pos - x_pos; |
| 1382 | y_off = display->y_pos - y_pos; |
| 1383 | |
| 1384 | clut = get_clut(ctx, region->clut); |
| 1385 | |
| 1386 | if (!clut) |
| 1387 | clut = &default_clut; |
| 1388 | |
| 1389 | switch (region->depth) { |
| 1390 | case 2: |
| 1391 | clut_table = clut->clut4; |
| 1392 | break; |
| 1393 | case 8: |
| 1394 | clut_table = clut->clut256; |
| 1395 | break; |
| 1396 | case 4: |
| 1397 | default: |
| 1398 | clut_table = clut->clut16; |
| 1399 | break; |
| 1400 | } |
| 1401 | |
| 1402 | for (y = 0; y < region->height; y++) { |
| 1403 | for (x = 0; x < region->width; x++) { |
| 1404 | pbuf[((y + y_off) * width) + x_off + x] = |
| 1405 | clut_table[region->pbuf[y * region->width + x]]; |
| 1406 | } |
| 1407 | } |
| 1408 | |
| 1409 | } |
| 1410 | |
| 1411 | snprintf(filename, sizeof(filename), "dvbs.%d", fileno_index); |
| 1412 | |
| 1413 | png_save2(filename, pbuf, width, height); |
| 1414 | |
| 1415 | av_free(pbuf); |
| 1416 | } |
| 1417 | |
| 1418 | fileno_index++; |
| 1419 | } |
| 1420 | #endif |
| 1421 | |
| 1422 | static void dvbsub_parse_display_definition_segment(AVCodecContext *avctx, |
| 1423 | const uint8_t *buf, |
| 1424 | int buf_size) |
| 1425 | { |
| 1426 | DVBSubContext *ctx = avctx->priv_data; |
| 1427 | DVBSubDisplayDefinition *display_def = ctx->display_definition; |
| 1428 | int dds_version, info_byte; |
| 1429 | |
| 1430 | if (buf_size < 5) |
| 1431 | return; |
| 1432 | |
| 1433 | info_byte = bytestream_get_byte(&buf); |
| 1434 | dds_version = info_byte >> 4; |
| 1435 | if (display_def && display_def->version == dds_version) |
| 1436 | return; // already have this display definition version |
| 1437 | |
| 1438 | if (!display_def) { |
| 1439 | display_def = av_mallocz(sizeof(*display_def)); |
| 1440 | ctx->display_definition = display_def; |
| 1441 | } |
| 1442 | if (!display_def) |
| 1443 | return; |
| 1444 | |
| 1445 | display_def->version = dds_version; |
| 1446 | display_def->x = 0; |
| 1447 | display_def->y = 0; |
| 1448 | display_def->width = bytestream_get_be16(&buf) + 1; |
| 1449 | display_def->height = bytestream_get_be16(&buf) + 1; |
| 1450 | if (!avctx->width || !avctx->height) { |
| 1451 | avctx->width = display_def->width; |
| 1452 | avctx->height = display_def->height; |
| 1453 | } |
| 1454 | |
| 1455 | if (buf_size < 13) |
| 1456 | return; |
| 1457 | |
| 1458 | if (info_byte & 1<<3) { // display_window_flag |
| 1459 | display_def->x = bytestream_get_be16(&buf); |
| 1460 | display_def->width = bytestream_get_be16(&buf) - display_def->x + 1; |
| 1461 | display_def->y = bytestream_get_be16(&buf); |
| 1462 | display_def->height = bytestream_get_be16(&buf) - display_def->y + 1; |
| 1463 | } |
| 1464 | } |
| 1465 | |
| 1466 | static void dvbsub_display_end_segment(AVCodecContext *avctx, const uint8_t *buf, |
| 1467 | int buf_size, AVSubtitle *sub,int *got_output) |
| 1468 | { |
| 1469 | DVBSubContext *ctx = avctx->priv_data; |
| 1470 | |
| 1471 | if(ctx->compute_edt == 0) |
| 1472 | save_subtitle_set(avctx, sub, got_output); |
| 1473 | #ifdef DEBUG |
| 1474 | save_display_set(ctx); |
| 1475 | #endif |
| 1476 | |
| 1477 | } |
| 1478 | |
| 1479 | static int dvbsub_decode(AVCodecContext *avctx, |
| 1480 | void *data, int *data_size, |
| 1481 | AVPacket *avpkt) |
| 1482 | { |
| 1483 | const uint8_t *buf = avpkt->data; |
| 1484 | int buf_size = avpkt->size; |
| 1485 | DVBSubContext *ctx = avctx->priv_data; |
| 1486 | AVSubtitle *sub = data; |
| 1487 | const uint8_t *p, *p_end; |
| 1488 | int segment_type; |
| 1489 | int page_id; |
| 1490 | int segment_length; |
| 1491 | int i; |
| 1492 | int ret = 0; |
| 1493 | int got_segment = 0; |
| 1494 | |
| 1495 | av_dlog(avctx, "DVB sub packet:\n"); |
| 1496 | |
| 1497 | for (i=0; i < buf_size; i++) { |
| 1498 | av_dlog(avctx, "%02x ", buf[i]); |
| 1499 | if (i % 16 == 15) |
| 1500 | av_dlog(avctx, "\n"); |
| 1501 | } |
| 1502 | |
| 1503 | if (i % 16) |
| 1504 | av_dlog(avctx, "\n"); |
| 1505 | |
| 1506 | if (buf_size <= 6 || *buf != 0x0f) { |
| 1507 | av_dlog(avctx, "incomplete or broken packet"); |
| 1508 | return -1; |
| 1509 | } |
| 1510 | |
| 1511 | p = buf; |
| 1512 | p_end = buf + buf_size; |
| 1513 | |
| 1514 | while (p_end - p >= 6 && *p == 0x0f) { |
| 1515 | p += 1; |
| 1516 | segment_type = *p++; |
| 1517 | page_id = AV_RB16(p); |
| 1518 | p += 2; |
| 1519 | segment_length = AV_RB16(p); |
| 1520 | p += 2; |
| 1521 | |
| 1522 | if (avctx->debug & FF_DEBUG_STARTCODE) { |
| 1523 | av_log(avctx, AV_LOG_DEBUG, "segment_type:%d page_id:%d segment_length:%d\n", segment_type, page_id, segment_length); |
| 1524 | } |
| 1525 | |
| 1526 | if (p_end - p < segment_length) { |
| 1527 | av_dlog(avctx, "incomplete or broken packet"); |
| 1528 | ret = -1; |
| 1529 | goto end; |
| 1530 | } |
| 1531 | |
| 1532 | if (page_id == ctx->composition_id || page_id == ctx->ancillary_id || |
| 1533 | ctx->composition_id == -1 || ctx->ancillary_id == -1) { |
| 1534 | switch (segment_type) { |
| 1535 | case DVBSUB_PAGE_SEGMENT: |
| 1536 | dvbsub_parse_page_segment(avctx, p, segment_length, sub, data_size); |
| 1537 | got_segment |= 1; |
| 1538 | break; |
| 1539 | case DVBSUB_REGION_SEGMENT: |
| 1540 | dvbsub_parse_region_segment(avctx, p, segment_length); |
| 1541 | got_segment |= 2; |
| 1542 | break; |
| 1543 | case DVBSUB_CLUT_SEGMENT: |
| 1544 | ret = dvbsub_parse_clut_segment(avctx, p, segment_length); |
| 1545 | if (ret < 0) goto end; |
| 1546 | got_segment |= 4; |
| 1547 | break; |
| 1548 | case DVBSUB_OBJECT_SEGMENT: |
| 1549 | dvbsub_parse_object_segment(avctx, p, segment_length); |
| 1550 | got_segment |= 8; |
| 1551 | break; |
| 1552 | case DVBSUB_DISPLAYDEFINITION_SEGMENT: |
| 1553 | dvbsub_parse_display_definition_segment(avctx, p, segment_length); |
| 1554 | break; |
| 1555 | case DVBSUB_DISPLAY_SEGMENT: |
| 1556 | dvbsub_display_end_segment(avctx, p, segment_length, sub, data_size); |
| 1557 | got_segment |= 16; |
| 1558 | break; |
| 1559 | default: |
| 1560 | av_dlog(avctx, "Subtitling segment type 0x%x, page id %d, length %d\n", |
| 1561 | segment_type, page_id, segment_length); |
| 1562 | break; |
| 1563 | } |
| 1564 | } |
| 1565 | |
| 1566 | p += segment_length; |
| 1567 | } |
| 1568 | // Some streams do not send a display segment but if we have all the other |
| 1569 | // segments then we need no further data. |
| 1570 | if (got_segment == 15) { |
| 1571 | av_log(avctx, AV_LOG_DEBUG, "Missing display_end_segment, emulating\n"); |
| 1572 | dvbsub_display_end_segment(avctx, p, 0, sub, data_size); |
| 1573 | } |
| 1574 | |
| 1575 | end: |
| 1576 | if(ret < 0) { |
| 1577 | *data_size = 0; |
| 1578 | avsubtitle_free(sub); |
| 1579 | return ret; |
| 1580 | } else { |
| 1581 | if(ctx->compute_edt == 1 ) |
| 1582 | FFSWAP(int64_t, ctx->prev_start, sub->pts); |
| 1583 | } |
| 1584 | |
| 1585 | return p - buf; |
| 1586 | } |
| 1587 | |
| 1588 | #define DS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_SUBTITLE_PARAM |
| 1589 | static const AVOption options[] = { |
| 1590 | {"compute_edt", "compute end of time using pts or timeout", offsetof(DVBSubContext, compute_edt), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DS}, |
| 1591 | {NULL} |
| 1592 | }; |
| 1593 | static const AVClass dvbsubdec_class = { |
| 1594 | .class_name = "DVB Sub Decoder", |
| 1595 | .item_name = av_default_item_name, |
| 1596 | .option = options, |
| 1597 | .version = LIBAVUTIL_VERSION_INT, |
| 1598 | }; |
| 1599 | |
| 1600 | AVCodec ff_dvbsub_decoder = { |
| 1601 | .name = "dvbsub", |
| 1602 | .long_name = NULL_IF_CONFIG_SMALL("DVB subtitles"), |
| 1603 | .type = AVMEDIA_TYPE_SUBTITLE, |
| 1604 | .id = AV_CODEC_ID_DVB_SUBTITLE, |
| 1605 | .priv_data_size = sizeof(DVBSubContext), |
| 1606 | .init = dvbsub_init_decoder, |
| 1607 | .close = dvbsub_close_decoder, |
| 1608 | .decode = dvbsub_decode, |
| 1609 | .priv_class = &dvbsubdec_class, |
| 1610 | }; |