/src/FreeImage/Source/LibOpenJPEG/t2.c
C | 793 lines | 561 code | 99 blank | 133 comment | 190 complexity | 7fbbdb8a4f3035c45f7f53beeb3fa933 MD5 | raw file
1/* 2 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium 3 * Copyright (c) 2002-2007, Professor Benoit Macq 4 * Copyright (c) 2001-2003, David Janssens 5 * Copyright (c) 2002-2003, Yannick Verschueren 6 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe 7 * Copyright (c) 2005, Herve Drolon, FreeImage Team 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "opj_includes.h" 33 34/** @defgroup T2 T2 - Implementation of a tier-2 coding */ 35/*@{*/ 36 37/** @name Local static functions */ 38/*@{*/ 39 40static void t2_putcommacode(opj_bio_t *bio, int n); 41static int t2_getcommacode(opj_bio_t *bio); 42/** 43Variable length code for signalling delta Zil (truncation point) 44@param bio Bit Input/Output component 45@param n delta Zil 46*/ 47static void t2_putnumpasses(opj_bio_t *bio, int n); 48static int t2_getnumpasses(opj_bio_t *bio); 49/** 50Encode a packet of a tile to a destination buffer 51@param tile Tile for which to write the packets 52@param tcp Tile coding parameters 53@param pi Packet identity 54@param dest Destination buffer 55@param len Length of the destination buffer 56@param cstr_info Codestream information structure 57@param tileno Number of the tile encoded 58@return 59*/ 60static int t2_encode_packet(opj_tcd_tile_t *tile, opj_tcp_t *tcp, opj_pi_iterator_t *pi, unsigned char *dest, int len, opj_codestream_info_t *cstr_info, int tileno); 61/** 62@param cblk 63@param index 64@param cblksty 65@param first 66*/ 67static void t2_init_seg(opj_tcd_cblk_dec_t* cblk, int index, int cblksty, int first); 68/** 69Decode a packet of a tile from a source buffer 70@param t2 T2 handle 71@param src Source buffer 72@param len Length of the source buffer 73@param tile Tile for which to write the packets 74@param tcp Tile coding parameters 75@param pi Packet identity 76@param pack_info Packet information 77@return 78*/ 79static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile, 80 opj_tcp_t *tcp, opj_pi_iterator_t *pi, opj_packet_info_t *pack_info); 81 82/*@}*/ 83 84/*@}*/ 85 86/* ----------------------------------------------------------------------- */ 87 88/* #define RESTART 0x04 */ 89 90static void t2_putcommacode(opj_bio_t *bio, int n) { 91 while (--n >= 0) { 92 bio_write(bio, 1, 1); 93 } 94 bio_write(bio, 0, 1); 95} 96 97static int t2_getcommacode(opj_bio_t *bio) { 98 int n; 99 for (n = 0; bio_read(bio, 1); n++) { 100 ; 101 } 102 return n; 103} 104 105static void t2_putnumpasses(opj_bio_t *bio, int n) { 106 if (n == 1) { 107 bio_write(bio, 0, 1); 108 } else if (n == 2) { 109 bio_write(bio, 2, 2); 110 } else if (n <= 5) { 111 bio_write(bio, 0xc | (n - 3), 4); 112 } else if (n <= 36) { 113 bio_write(bio, 0x1e0 | (n - 6), 9); 114 } else if (n <= 164) { 115 bio_write(bio, 0xff80 | (n - 37), 16); 116 } 117} 118 119static int t2_getnumpasses(opj_bio_t *bio) { 120 int n; 121 if (!bio_read(bio, 1)) 122 return 1; 123 if (!bio_read(bio, 1)) 124 return 2; 125 if ((n = bio_read(bio, 2)) != 3) 126 return (3 + n); 127 if ((n = bio_read(bio, 5)) != 31) 128 return (6 + n); 129 return (37 + bio_read(bio, 7)); 130} 131 132static int t2_encode_packet(opj_tcd_tile_t * tile, opj_tcp_t * tcp, opj_pi_iterator_t *pi, unsigned char *dest, int length, opj_codestream_info_t *cstr_info, int tileno) { 133 int bandno, cblkno; 134 unsigned char *c = dest; 135 136 int compno = pi->compno; /* component value */ 137 int resno = pi->resno; /* resolution level value */ 138 int precno = pi->precno; /* precinct value */ 139 int layno = pi->layno; /* quality layer value */ 140 141 opj_tcd_tilecomp_t *tilec = &tile->comps[compno]; 142 opj_tcd_resolution_t *res = &tilec->resolutions[resno]; 143 144 opj_bio_t *bio = NULL; /* BIO component */ 145 146 /* <SOP 0xff91> */ 147 if (tcp->csty & J2K_CP_CSTY_SOP) { 148 c[0] = 255; 149 c[1] = 145; 150 c[2] = 0; 151 c[3] = 4; 152 c[4] = (unsigned char)((tile->packno % 65536) / 256); 153 c[5] = (unsigned char)((tile->packno % 65536) % 256); 154 c += 6; 155 } 156 /* </SOP> */ 157 158 if (!layno) { 159 for (bandno = 0; bandno < res->numbands; bandno++) { 160 opj_tcd_band_t *band = &res->bands[bandno]; 161 opj_tcd_precinct_t *prc = &band->precincts[precno]; 162 tgt_reset(prc->incltree); 163 tgt_reset(prc->imsbtree); 164 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) { 165 opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno]; 166 cblk->numpasses = 0; 167 tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps); 168 } 169 } 170 } 171 172 bio = bio_create(); 173 bio_init_enc(bio, c, length); 174 bio_write(bio, 1, 1); /* Empty header bit */ 175 176 /* Writing Packet header */ 177 for (bandno = 0; bandno < res->numbands; bandno++) { 178 opj_tcd_band_t *band = &res->bands[bandno]; 179 opj_tcd_precinct_t *prc = &band->precincts[precno]; 180 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) { 181 opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno]; 182 opj_tcd_layer_t *layer = &cblk->layers[layno]; 183 if (!cblk->numpasses && layer->numpasses) { 184 tgt_setvalue(prc->incltree, cblkno, layno); 185 } 186 } 187 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) { 188 opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno]; 189 opj_tcd_layer_t *layer = &cblk->layers[layno]; 190 int increment = 0; 191 int nump = 0; 192 int len = 0, passno; 193 /* cblk inclusion bits */ 194 if (!cblk->numpasses) { 195 tgt_encode(bio, prc->incltree, cblkno, layno + 1); 196 } else { 197 bio_write(bio, layer->numpasses != 0, 1); 198 } 199 /* if cblk not included, go to the next cblk */ 200 if (!layer->numpasses) { 201 continue; 202 } 203 /* if first instance of cblk --> zero bit-planes information */ 204 if (!cblk->numpasses) { 205 cblk->numlenbits = 3; 206 tgt_encode(bio, prc->imsbtree, cblkno, 999); 207 } 208 /* number of coding passes included */ 209 t2_putnumpasses(bio, layer->numpasses); 210 211 /* computation of the increase of the length indicator and insertion in the header */ 212 for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) { 213 opj_tcd_pass_t *pass = &cblk->passes[passno]; 214 nump++; 215 len += pass->len; 216 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) { 217 increment = int_max(increment, int_floorlog2(len) + 1 - (cblk->numlenbits + int_floorlog2(nump))); 218 len = 0; 219 nump = 0; 220 } 221 } 222 t2_putcommacode(bio, increment); 223 224 /* computation of the new Length indicator */ 225 cblk->numlenbits += increment; 226 227 /* insertion of the codeword segment length */ 228 for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) { 229 opj_tcd_pass_t *pass = &cblk->passes[passno]; 230 nump++; 231 len += pass->len; 232 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) { 233 bio_write(bio, len, cblk->numlenbits + int_floorlog2(nump)); 234 len = 0; 235 nump = 0; 236 } 237 } 238 } 239 } 240 241 if (bio_flush(bio)) { 242 bio_destroy(bio); 243 return -999; /* modified to eliminate longjmp !! */ 244 } 245 246 c += bio_numbytes(bio); 247 bio_destroy(bio); 248 249 /* <EPH 0xff92> */ 250 if (tcp->csty & J2K_CP_CSTY_EPH) { 251 c[0] = 255; 252 c[1] = 146; 253 c += 2; 254 } 255 /* </EPH> */ 256 257 /* << INDEX */ 258 /* End of packet header position. Currently only represents the distance to start of packet 259 // Will be updated later by incrementing with packet start value */ 260 if(cstr_info && cstr_info->index_write) { 261 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno]; 262 info_PK->end_ph_pos = (int)(c - dest); 263 } 264 /* INDEX >> */ 265 266 /* Writing the packet body */ 267 268 for (bandno = 0; bandno < res->numbands; bandno++) { 269 opj_tcd_band_t *band = &res->bands[bandno]; 270 opj_tcd_precinct_t *prc = &band->precincts[precno]; 271 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) { 272 opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno]; 273 opj_tcd_layer_t *layer = &cblk->layers[layno]; 274 if (!layer->numpasses) { 275 continue; 276 } 277 if (c + layer->len > dest + length) { 278 return -999; 279 } 280 281 memcpy(c, layer->data, layer->len); 282 cblk->numpasses += layer->numpasses; 283 c += layer->len; 284 /* << INDEX */ 285 if(cstr_info && cstr_info->index_write) { 286 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno]; 287 info_PK->disto += layer->disto; 288 if (cstr_info->D_max < info_PK->disto) { 289 cstr_info->D_max = info_PK->disto; 290 } 291 } 292 /* INDEX >> */ 293 } 294 } 295 296 return (c - dest); 297} 298 299static void t2_init_seg(opj_tcd_cblk_dec_t* cblk, int index, int cblksty, int first) { 300 opj_tcd_seg_t* seg; 301 cblk->segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, (index + 1) * sizeof(opj_tcd_seg_t)); 302 seg = &cblk->segs[index]; 303 seg->data = NULL; 304 seg->dataindex = 0; 305 seg->numpasses = 0; 306 seg->len = 0; 307 if (cblksty & J2K_CCP_CBLKSTY_TERMALL) { 308 seg->maxpasses = 1; 309 } 310 else if (cblksty & J2K_CCP_CBLKSTY_LAZY) { 311 if (first) { 312 seg->maxpasses = 10; 313 } else { 314 seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1; 315 } 316 } else { 317 seg->maxpasses = 109; 318 } 319} 320 321static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile, 322 opj_tcp_t *tcp, opj_pi_iterator_t *pi, opj_packet_info_t *pack_info) { 323 int bandno, cblkno; 324 unsigned char *c = src; 325 326 opj_cp_t *cp = t2->cp; 327 328 int compno = pi->compno; /* component value */ 329 int resno = pi->resno; /* resolution level value */ 330 int precno = pi->precno; /* precinct value */ 331 int layno = pi->layno; /* quality layer value */ 332 333 opj_tcd_resolution_t* res = &tile->comps[compno].resolutions[resno]; 334 335 unsigned char *hd = NULL; 336 int present; 337 338 opj_bio_t *bio = NULL; /* BIO component */ 339 340 if (layno == 0) { 341 for (bandno = 0; bandno < res->numbands; bandno++) { 342 opj_tcd_band_t *band = &res->bands[bandno]; 343 opj_tcd_precinct_t *prc = &band->precincts[precno]; 344 345 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue; 346 347 tgt_reset(prc->incltree); 348 tgt_reset(prc->imsbtree); 349 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) { 350 opj_tcd_cblk_dec_t* cblk = &prc->cblks.dec[cblkno]; 351 cblk->numsegs = 0; 352 } 353 } 354 } 355 356 /* SOP markers */ 357 358 if (tcp->csty & J2K_CP_CSTY_SOP) { 359 if ((*c) != 0xff || (*(c + 1) != 0x91)) { 360 opj_event_msg(t2->cinfo, EVT_WARNING, "Expected SOP marker\n"); 361 } else { 362 c += 6; 363 } 364 365 /** TODO : check the Nsop value */ 366 } 367 368 /* 369 When the marker PPT/PPM is used the packet header are store in PPT/PPM marker 370 This part deal with this caracteristic 371 step 1: Read packet header in the saved structure 372 step 2: Return to codestream for decoding 373 */ 374 375 bio = bio_create(); 376 377 if (cp->ppm == 1) { /* PPM */ 378 hd = cp->ppm_data; 379 bio_init_dec(bio, hd, cp->ppm_len); 380 } else if (tcp->ppt == 1) { /* PPT */ 381 hd = tcp->ppt_data; 382 bio_init_dec(bio, hd, tcp->ppt_len); 383 } else { /* Normal Case */ 384 hd = c; 385 bio_init_dec(bio, hd, src+len-hd); 386 } 387 388 present = bio_read(bio, 1); 389 390 if (!present) { 391 bio_inalign(bio); 392 hd += bio_numbytes(bio); 393 bio_destroy(bio); 394 395 /* EPH markers */ 396 397 if (tcp->csty & J2K_CP_CSTY_EPH) { 398 if ((*hd) != 0xff || (*(hd + 1) != 0x92)) { 399 printf("Error : expected EPH marker\n"); 400 } else { 401 hd += 2; 402 } 403 } 404 405 /* << INDEX */ 406 /* End of packet header position. Currently only represents the distance to start of packet 407 // Will be updated later by incrementing with packet start value*/ 408 if(pack_info) { 409 pack_info->end_ph_pos = (int)(c - src); 410 } 411 /* INDEX >> */ 412 413 if (cp->ppm == 1) { /* PPM case */ 414 cp->ppm_len += cp->ppm_data-hd; 415 cp->ppm_data = hd; 416 return (c - src); 417 } 418 if (tcp->ppt == 1) { /* PPT case */ 419 tcp->ppt_len+=tcp->ppt_data-hd; 420 tcp->ppt_data = hd; 421 return (c - src); 422 } 423 424 return (hd - src); 425 } 426 427 for (bandno = 0; bandno < res->numbands; bandno++) { 428 opj_tcd_band_t *band = &res->bands[bandno]; 429 opj_tcd_precinct_t *prc = &band->precincts[precno]; 430 431 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue; 432 433 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) { 434 int included, increment, n, segno; 435 opj_tcd_cblk_dec_t* cblk = &prc->cblks.dec[cblkno]; 436 /* if cblk not yet included before --> inclusion tagtree */ 437 if (!cblk->numsegs) { 438 included = tgt_decode(bio, prc->incltree, cblkno, layno + 1); 439 /* else one bit */ 440 } else { 441 included = bio_read(bio, 1); 442 } 443 /* if cblk not included */ 444 if (!included) { 445 cblk->numnewpasses = 0; 446 continue; 447 } 448 /* if cblk not yet included --> zero-bitplane tagtree */ 449 if (!cblk->numsegs) { 450 int i, numimsbs; 451 for (i = 0; !tgt_decode(bio, prc->imsbtree, cblkno, i); i++) { 452 ; 453 } 454 numimsbs = i - 1; 455 cblk->numbps = band->numbps - numimsbs; 456 cblk->numlenbits = 3; 457 } 458 /* number of coding passes */ 459 cblk->numnewpasses = t2_getnumpasses(bio); 460 increment = t2_getcommacode(bio); 461 /* length indicator increment */ 462 cblk->numlenbits += increment; 463 segno = 0; 464 if (!cblk->numsegs) { 465 t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 1); 466 } else { 467 segno = cblk->numsegs - 1; 468 if (cblk->segs[segno].numpasses == cblk->segs[segno].maxpasses) { 469 ++segno; 470 t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 0); 471 } 472 } 473 n = cblk->numnewpasses; 474 475 do { 476 cblk->segs[segno].numnewpasses = int_min(cblk->segs[segno].maxpasses - cblk->segs[segno].numpasses, n); 477 cblk->segs[segno].newlen = bio_read(bio, cblk->numlenbits + int_floorlog2(cblk->segs[segno].numnewpasses)); 478 n -= cblk->segs[segno].numnewpasses; 479 if (n > 0) { 480 ++segno; 481 t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 0); 482 } 483 } while (n > 0); 484 } 485 } 486 487 if (bio_inalign(bio)) { 488 bio_destroy(bio); 489 return -999; 490 } 491 492 hd += bio_numbytes(bio); 493 bio_destroy(bio); 494 495 /* EPH markers */ 496 if (tcp->csty & J2K_CP_CSTY_EPH) { 497 if ((*hd) != 0xff || (*(hd + 1) != 0x92)) { 498 opj_event_msg(t2->cinfo, EVT_ERROR, "Expected EPH marker\n"); 499 return -999; 500 } else { 501 hd += 2; 502 } 503 } 504 505 /* << INDEX */ 506 /* End of packet header position. Currently only represents the distance to start of packet 507 // Will be updated later by incrementing with packet start value*/ 508 if(pack_info) { 509 pack_info->end_ph_pos = (int)(hd - src); 510 } 511 /* INDEX >> */ 512 513 if (cp->ppm==1) { 514 cp->ppm_len+=cp->ppm_data-hd; 515 cp->ppm_data = hd; 516 } else if (tcp->ppt == 1) { 517 tcp->ppt_len+=tcp->ppt_data-hd; 518 tcp->ppt_data = hd; 519 } else { 520 c=hd; 521 } 522 523 for (bandno = 0; bandno < res->numbands; bandno++) { 524 opj_tcd_band_t *band = &res->bands[bandno]; 525 opj_tcd_precinct_t *prc = &band->precincts[precno]; 526 527 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue; 528 529 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) { 530 opj_tcd_cblk_dec_t* cblk = &prc->cblks.dec[cblkno]; 531 opj_tcd_seg_t *seg = NULL; 532 if (!cblk->numnewpasses) 533 continue; 534 if (!cblk->numsegs) { 535 seg = &cblk->segs[0]; 536 cblk->numsegs++; 537 cblk->len = 0; 538 } else { 539 seg = &cblk->segs[cblk->numsegs - 1]; 540 if (seg->numpasses == seg->maxpasses) { 541 seg++; 542 cblk->numsegs++; 543 } 544 } 545 546 do { 547 if (c + seg->newlen > src + len) { 548 return -999; 549 } 550 551#ifdef USE_JPWL 552 /* we need here a j2k handle to verify if making a check to 553 the validity of cblocks parameters is selected from user (-W) */ 554 555 /* let's check that we are not exceeding */ 556 if ((cblk->len + seg->newlen) > 8192) { 557 opj_event_msg(t2->cinfo, EVT_WARNING, 558 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n", 559 seg->newlen, cblkno, precno, bandno, resno, compno); 560 if (!JPWL_ASSUME) { 561 opj_event_msg(t2->cinfo, EVT_ERROR, "JPWL: giving up\n"); 562 return -999; 563 } 564 seg->newlen = 8192 - cblk->len; 565 opj_event_msg(t2->cinfo, EVT_WARNING, " - truncating segment to %d\n", seg->newlen); 566 break; 567 }; 568 569#endif /* USE_JPWL */ 570 571 cblk->data = (unsigned char*) opj_realloc(cblk->data, (cblk->len + seg->newlen) * sizeof(unsigned char)); 572 memcpy(cblk->data + cblk->len, c, seg->newlen); 573 if (seg->numpasses == 0) { 574 seg->data = &cblk->data; 575 seg->dataindex = cblk->len; 576 } 577 c += seg->newlen; 578 cblk->len += seg->newlen; 579 seg->len += seg->newlen; 580 seg->numpasses += seg->numnewpasses; 581 cblk->numnewpasses -= seg->numnewpasses; 582 if (cblk->numnewpasses > 0) { 583 seg++; 584 cblk->numsegs++; 585 } 586 } while (cblk->numnewpasses > 0); 587 } 588 } 589 590 return (c - src); 591} 592 593/* ----------------------------------------------------------------------- */ 594 595int t2_encode_packets(opj_t2_t* t2,int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_codestream_info_t *cstr_info,int tpnum, int tppos,int pino, J2K_T2_MODE t2_mode, int cur_totnum_tp){ 596 unsigned char *c = dest; 597 int e = 0; 598 int compno; 599 opj_pi_iterator_t *pi = NULL; 600 int poc; 601 opj_image_t *image = t2->image; 602 opj_cp_t *cp = t2->cp; 603 opj_tcp_t *tcp = &cp->tcps[tileno]; 604 int pocno = cp->cinema == CINEMA4K_24? 2: 1; 605 int maxcomp = cp->max_comp_size > 0 ? image->numcomps : 1; 606 607 pi = pi_initialise_encode(image, cp, tileno, t2_mode); 608 if(!pi) { 609 /* TODO: throw an error */ 610 return -999; 611 } 612 613 if(t2_mode == THRESH_CALC ){ /* Calculating threshold */ 614 for(compno = 0; compno < maxcomp; compno++ ){ 615 for(poc = 0; poc < pocno ; poc++){ 616 int comp_len = 0; 617 int tpnum = compno; 618 if (pi_create_encode(pi, cp,tileno,poc,tpnum,tppos,t2_mode,cur_totnum_tp)) { 619 opj_event_msg(t2->cinfo, EVT_ERROR, "Error initializing Packet Iterator\n"); 620 pi_destroy(pi, cp, tileno); 621 return -999; 622 } 623 while (pi_next(&pi[poc])) { 624 if (pi[poc].layno < maxlayers) { 625 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[poc], c, dest + len - c, cstr_info, tileno); 626 comp_len = comp_len + e; 627 if (e == -999) { 628 break; 629 } else { 630 c += e; 631 } 632 } 633 } 634 if (e == -999) break; 635 if (cp->max_comp_size){ 636 if (comp_len > cp->max_comp_size){ 637 e = -999; 638 break; 639 } 640 } 641 } 642 if (e == -999) break; 643 } 644 }else{ /* t2_mode == FINAL_PASS */ 645 pi_create_encode(pi, cp,tileno,pino,tpnum,tppos,t2_mode,cur_totnum_tp); 646 while (pi_next(&pi[pino])) { 647 if (pi[pino].layno < maxlayers) { 648 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[pino], c, dest + len - c, cstr_info, tileno); 649 if (e == -999) { 650 break; 651 } else { 652 c += e; 653 } 654 /* INDEX >> */ 655 if(cstr_info) { 656 if(cstr_info->index_write) { 657 opj_tile_info_t *info_TL = &cstr_info->tile[tileno]; 658 opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno]; 659 if (!cstr_info->packno) { 660 info_PK->start_pos = info_TL->end_header + 1; 661 } else { 662 info_PK->start_pos = ((cp->tp_on | tcp->POC)&& info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[cstr_info->packno - 1].end_pos + 1; 663 } 664 info_PK->end_pos = info_PK->start_pos + e - 1; 665 info_PK->end_ph_pos += info_PK->start_pos - 1; /* End of packet header which now only represents the distance 666 // to start of packet is incremented by value of start of packet*/ 667 } 668 669 cstr_info->packno++; 670 } 671 /* << INDEX */ 672 tile->packno++; 673 } 674 } 675 } 676 677 pi_destroy(pi, cp, tileno); 678 679 if (e == -999) { 680 return e; 681 } 682 683 return (c - dest); 684} 685 686int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile, opj_codestream_info_t *cstr_info) { 687 unsigned char *c = src; 688 opj_pi_iterator_t *pi; 689 int pino, e = 0; 690 int n = 0, curtp = 0; 691 int tp_start_packno; 692 693 opj_image_t *image = t2->image; 694 opj_cp_t *cp = t2->cp; 695 696 /* create a packet iterator */ 697 pi = pi_create_decode(image, cp, tileno); 698 if(!pi) { 699 /* TODO: throw an error */ 700 return -999; 701 } 702 703 tp_start_packno = 0; 704 705 for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) { 706 while (pi_next(&pi[pino])) { 707 if ((cp->layer==0) || (cp->layer>=((pi[pino].layno)+1))) { 708 opj_packet_info_t *pack_info; 709 if (cstr_info) 710 pack_info = &cstr_info->tile[tileno].packet[cstr_info->packno]; 711 else 712 pack_info = NULL; 713 e = t2_decode_packet(t2, c, src + len - c, tile, &cp->tcps[tileno], &pi[pino], pack_info); 714 } else { 715 e = 0; 716 } 717 if(e == -999) return -999; 718 /* progression in resolution */ 719 image->comps[pi[pino].compno].resno_decoded = 720 (e > 0) ? 721 int_max(pi[pino].resno, image->comps[pi[pino].compno].resno_decoded) 722 : image->comps[pi[pino].compno].resno_decoded; 723 n++; 724 725 /* INDEX >> */ 726 if(cstr_info) { 727 opj_tile_info_t *info_TL = &cstr_info->tile[tileno]; 728 opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno]; 729 if (!cstr_info->packno) { 730 info_PK->start_pos = info_TL->end_header + 1; 731 } else if (info_TL->packet[cstr_info->packno-1].end_pos >= (int)cstr_info->tile[tileno].tp[curtp].tp_end_pos){ /* New tile part*/ 732 info_TL->tp[curtp].tp_numpacks = cstr_info->packno - tp_start_packno; /* Number of packets in previous tile-part*/ 733 info_TL->tp[curtp].tp_start_pack = tp_start_packno; 734 tp_start_packno = cstr_info->packno; 735 curtp++; 736 info_PK->start_pos = cstr_info->tile[tileno].tp[curtp].tp_end_header+1; 737 } else { 738 info_PK->start_pos = (cp->tp_on && info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[cstr_info->packno - 1].end_pos + 1; 739 } 740 info_PK->end_pos = info_PK->start_pos + e - 1; 741 info_PK->end_ph_pos += info_PK->start_pos - 1; /* End of packet header which now only represents the distance 742 // to start of packet is incremented by value of start of packet*/ 743 cstr_info->packno++; 744 } 745 /* << INDEX */ 746 747 if (e == -999) { /* ADD */ 748 break; 749 } else { 750 c += e; 751 } 752 } 753 } 754 /* INDEX >> */ 755 if(cstr_info) { 756 cstr_info->tile[tileno].tp[curtp].tp_numpacks = cstr_info->packno - tp_start_packno; /* Number of packets in last tile-part*/ 757 cstr_info->tile[tileno].tp[curtp].tp_start_pack = tp_start_packno; 758 } 759 /* << INDEX */ 760 761 /* don't forget to release pi */ 762 pi_destroy(pi, cp, tileno); 763 764 if (e == -999) { 765 return e; 766 } 767 768 return (c - src); 769} 770 771/* ----------------------------------------------------------------------- */ 772 773opj_t2_t* t2_create(opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp) { 774 /* create the tcd structure */ 775 opj_t2_t *t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t)); 776 if(!t2) return NULL; 777 t2->cinfo = cinfo; 778 t2->image = image; 779 t2->cp = cp; 780 781 return t2; 782} 783 784void t2_destroy(opj_t2_t *t2) { 785 if(t2) { 786 opj_free(t2); 787 } 788} 789 790 791 792 793