libopenjpeg/t2.c

   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
  40 static void t2_putcommacode(opj_bio_t *bio, int n);
  41 static int t2_getcommacode(opj_bio_t *bio);
  42 /**
  43 Variable length code for signalling delta Zil (truncation point)
  44 @param bio Bit Input/Output component
  45 @param n delta Zil
  46 */
  47 static void t2_putnumpasses(opj_bio_t *bio, int n);
  48 static int t2_getnumpasses(opj_bio_t *bio);
  49 /**
  50 Encode 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 */
  60 static 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 */
  67 static void t2_init_seg(opj_tcd_cblk_dec_t* cblk, int index, int cblksty, int first);
  68 /**
  69 Decode 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 */
  79 static 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
  90 static 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
  97 static 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
 105 static 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
 119 static 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
 132 static 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
 299 static 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
 321 static 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
 595 int 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
 686 int 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
 773 opj_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
 784 void t2_destroy(opj_t2_t *t2) {
 785         if(t2) {
 786                 opj_free(t2);
 787         }
 788 }
 789
 790
 791
 792
 793