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 image_info Structure to create an index file
  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_image_info_t *image_info, int tileno);
  61 /**
  62 @param seg
  63 @param cblksty
  64 @param first
  65 */
  66 static void t2_init_seg(opj_tcd_seg_t *seg, int cblksty, int first);
  67 /**
  68 Decode a packet of a tile from a source buffer
  69 @param t2 T2 handle
  70 @param src Source buffer
  71 @param len Length of the source buffer
  72 @param tile Tile for which to write the packets
  73 @param tcp Tile coding parameters
  74 @param pi Packet identity
  75 @return
  76 */
  77 static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile, opj_tcp_t *tcp, opj_pi_iterator_t *pi);
  78
  79 /*@}*/
  80
  81 /*@}*/
  82
  83 /* ----------------------------------------------------------------------- */
  84
  85 /* #define RESTART 0x04 */
  86
  87 static void t2_putcommacode(opj_bio_t *bio, int n) {
  88         while (--n >= 0) {
  89                 bio_write(bio, 1, 1);
  90         }
  91         bio_write(bio, 0, 1);
  92 }
  93
  94 static int t2_getcommacode(opj_bio_t *bio) {
  95         int n;
  96         for (n = 0; bio_read(bio, 1); n++) {
  97                 ;
  98         }
  99         return n;
 100 }
 101
 102 static void t2_putnumpasses(opj_bio_t *bio, int n) {
 103         if (n == 1) {
 104                 bio_write(bio, 0, 1);
 105         } else if (n == 2) {
 106                 bio_write(bio, 2, 2);
 107         } else if (n <= 5) {
 108                 bio_write(bio, 0xc | (n - 3), 4);
 109         } else if (n <= 36) {
 110                 bio_write(bio, 0x1e0 | (n - 6), 9);
 111         } else if (n <= 164) {
 112                 bio_write(bio, 0xff80 | (n - 37), 16);
 113         }
 114 }
 115
 116 static int t2_getnumpasses(opj_bio_t *bio) {
 117         int n;
 118         if (!bio_read(bio, 1))
 119                 return 1;
 120         if (!bio_read(bio, 1))
 121                 return 2;
 122         if ((n = bio_read(bio, 2)) != 3)
 123                 return (3 + n);
 124         if ((n = bio_read(bio, 5)) != 31)
 125                 return (6 + n);
 126         return (37 + bio_read(bio, 7));
 127 }
 128
 129 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_image_info_t * image_info, int tileno) {
 130         int bandno, cblkno;
 131         unsigned char *sop = 0, *eph = 0;
 132         unsigned char *c = dest;
 133
 134         int compno = pi->compno;        /* component value */
 135         int resno  = pi->resno;         /* resolution level value */
 136         int precno = pi->precno;        /* precinct value */
 137         int layno  = pi->layno;         /* quality layer value */
 138
 139         opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 140         opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 141
 142         opj_bio_t *bio = NULL;  /* BIO component */
 143
 144         /* <SOP 0xff91> */
 145         if (tcp->csty & J2K_CP_CSTY_SOP) {
 146                 sop = (unsigned char *) opj_malloc(6 * sizeof(unsigned char));
 147                 sop[0] = 255;
 148                 sop[1] = 145;
 149                 sop[2] = 0;
 150                 sop[3] = 4;
 151                 sop[4] = (image_info->num % 65536) / 256;
 152                 sop[5] = (image_info->num % 65536) % 256;
 153                 memcpy(c, sop, 6);
 154                 opj_free(sop);
 155                 c += 6;
 156         }
 157         /* </SOP> */
 158
 159         if (!layno) {
 160                 for (bandno = 0; bandno < res->numbands; bandno++) {
 161                         opj_tcd_band_t *band = &res->bands[bandno];
 162                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 163                         tgt_reset(prc->incltree);
 164                         tgt_reset(prc->imsbtree);
 165                         for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 166                                 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
 167                                 cblk->numpasses = 0;
 168                                 tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
 169                         }
 170                 }
 171         }
 172
 173         bio = bio_create();
 174         bio_init_enc(bio, c, length);
 175         bio_write(bio, 1, 1);           /* Empty header bit */
 176
 177         /* Writing Packet header */
 178         for (bandno = 0; bandno < res->numbands; bandno++) {
 179                 opj_tcd_band_t *band = &res->bands[bandno];
 180                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 181                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 182                         opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
 183                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 184                         if (!cblk->numpasses && layer->numpasses) {
 185                                 tgt_setvalue(prc->incltree, cblkno, layno);
 186                         }
 187                 }
 188                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 189                         opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
 190                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 191                         int increment = 0;
 192                         int nump = 0;
 193                         int len = 0, passno;
 194                         /* cblk inclusion bits */
 195                         if (!cblk->numpasses) {
 196                                 tgt_encode(bio, prc->incltree, cblkno, layno + 1);
 197                         } else {
 198                                 bio_write(bio, layer->numpasses != 0, 1);
 199                         }
 200                         /* if cblk not included, go to the next cblk  */
 201                         if (!layer->numpasses) {
 202                                 continue;
 203                         }
 204                         /* if first instance of cblk --> zero bit-planes information */
 205                         if (!cblk->numpasses) {
 206                                 cblk->numlenbits = 3;
 207                                 tgt_encode(bio, prc->imsbtree, cblkno, 999);
 208                         }
 209                         /* number of coding passes included */
 210                         t2_putnumpasses(bio, layer->numpasses);
 211
 212                         /* computation of the increase of the length indicator and insertion in the header     */
 213                         for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) {
 214                                 opj_tcd_pass_t *pass = &cblk->passes[passno];
 215                                 nump++;
 216                                 len += pass->len;
 217                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 218                                         increment = int_max(increment, int_floorlog2(len) + 1 - (cblk->numlenbits + int_floorlog2(nump)));
 219                                         len = 0;
 220                                         nump = 0;
 221                                 }
 222                         }
 223                         t2_putcommacode(bio, increment);
 224
 225                         /* computation of the new Length indicator */
 226                         cblk->numlenbits += increment;
 227
 228                         /* insertion of the codeword segment length */
 229                         for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) {
 230                                 opj_tcd_pass_t *pass = &cblk->passes[passno];
 231                                 nump++;
 232                                 len += pass->len;
 233                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 234                                         bio_write(bio, len, cblk->numlenbits + int_floorlog2(nump));
 235                                         len = 0;
 236                                         nump = 0;
 237                                 }
 238                         }
 239                 }
 240         }
 241
 242         if (bio_flush(bio)) {
 243                 return -999;            /* modified to eliminate longjmp !! */
 244         }
 245
 246         c += bio_numbytes(bio);
 247
 248         bio_destroy(bio);
 249
 250         /* <EPH 0xff92> */
 251         if (tcp->csty & J2K_CP_CSTY_EPH) {
 252                 eph = (unsigned char *) opj_malloc(2 * sizeof(unsigned char));
 253                 eph[0] = 255;
 254                 eph[1] = 146;
 255                 memcpy(c, eph, 2);
 256                 opj_free(eph);
 257                 c += 2;
 258         }
 259         /* </EPH> */
 260
 261         /* Writing the packet body */
 262
 263         for (bandno = 0; bandno < res->numbands; bandno++) {
 264                 opj_tcd_band_t *band = &res->bands[bandno];
 265                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 266                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 267                         opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
 268                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 269                         if (!layer->numpasses) {
 270                                 continue;
 271                         }
 272                         if (c + layer->len > dest + length) {
 273                                 return -999;
 274                         }
 275
 276                         memcpy(c, layer->data, layer->len);
 277                         cblk->numpasses += layer->numpasses;
 278                         c += layer->len;
 279                         /* ADD for index Cfr. Marcela --> delta disto by packet */
 280                         if(image_info && image_info->index_write && image_info->index_on) {
 281                                 opj_tile_info_t *info_TL = &image_info->tile[tileno];
 282                                 opj_packet_info_t *info_PK = &info_TL->packet[image_info->num];
 283                                 info_PK->disto += layer->disto;
 284                                 if (image_info->D_max < info_PK->disto) {
 285                                         image_info->D_max = info_PK->disto;
 286                                 }
 287                         }
 288                         /* </ADD> */
 289                 }
 290         }
 291
 292         return (c - dest);
 293 }
 294
 295 static void t2_init_seg(opj_tcd_seg_t * seg, int cblksty, int first) {
 296         seg->numpasses = 0;
 297         seg->len = 0;
 298         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
 299                 seg->maxpasses = 1;
 300         }
 301         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
 302                 if (first) {
 303                         seg->maxpasses = 10;
 304                 } else {
 305                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
 306                 }
 307         } else {
 308                 seg->maxpasses = 109;
 309         }
 310 }
 311
 312 static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile, opj_tcp_t *tcp, opj_pi_iterator_t *pi) {
 313         int bandno, cblkno;
 314         unsigned char *c = src;
 315
 316         opj_cp_t *cp = t2->cp;
 317
 318         int compno = pi->compno;        /* component value */
 319         int resno  = pi->resno;         /* resolution level value */
 320         int precno = pi->precno;        /* precinct value */
 321         int layno  = pi->layno;         /* quality layer value */
 322
 323         opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 324         opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 325
 326         unsigned char *hd = NULL;
 327         int present;
 328
 329         opj_bio_t *bio = NULL;  /* BIO component */
 330
 331         if (layno == 0) {
 332                 for (bandno = 0; bandno < res->numbands; bandno++) {
 333                         opj_tcd_band_t *band = &res->bands[bandno];
 334                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 335
 336                         if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
 337
 338                         tgt_reset(prc->incltree);
 339                         tgt_reset(prc->imsbtree);
 340                         for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 341                                 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
 342                                 cblk->numsegs = 0;
 343                         }
 344                 }
 345         }
 346
 347         /* SOP markers */
 348
 349         if (tcp->csty & J2K_CP_CSTY_SOP) {
 350                 if ((*c) != 0xff || (*(c + 1) != 0x91)) {
 351                         opj_event_msg(t2->cinfo, EVT_WARNING, "Expected SOP marker\n");
 352                 } else {
 353                         c += 6;
 354                 }
 355
 356                 /** TODO : check the Nsop value */
 357         }
 358
 359         /*
 360         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
 361         This part deal with this caracteristic
 362         step 1: Read packet header in the saved structure
 363         step 2: Return to codestream for decoding
 364         */
 365
 366         bio = bio_create();
 367
 368         if (cp->ppm == 1) {             /* PPM */
 369                 hd = cp->ppm_data;
 370                 bio_init_dec(bio, hd, cp->ppm_len);
 371         } else if (tcp->ppt == 1) {     /* PPT */
 372                 hd = tcp->ppt_data;
 373                 bio_init_dec(bio, hd, tcp->ppt_len);
 374         } else {                        /* Normal Case */
 375                 hd = c;
 376                 bio_init_dec(bio, hd, src+len-hd);
 377         }
 378
 379         present = bio_read(bio, 1);
 380
 381         if (!present) {
 382                 bio_inalign(bio);
 383                 hd += bio_numbytes(bio);
 384                 bio_destroy(bio);
 385
 386                 /* EPH markers */
 387
 388                 if (tcp->csty & J2K_CP_CSTY_EPH) {
 389                         if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
 390                                 printf("Error : expected EPH marker\n");
 391                         } else {
 392                                 hd += 2;
 393                         }
 394                 }
 395
 396                 if (cp->ppm == 1) {             /* PPM case */
 397                         cp->ppm_len += cp->ppm_data-hd;
 398                         cp->ppm_data = hd;
 399                         return (c - src);
 400                 }
 401                 if (tcp->ppt == 1) {    /* PPT case */
 402                         tcp->ppt_len+=tcp->ppt_data-hd;
 403                         tcp->ppt_data = hd;
 404                         return (c - src);
 405                 }
 406
 407                 return (hd - src);
 408         }
 409
 410         for (bandno = 0; bandno < res->numbands; bandno++) {
 411                 opj_tcd_band_t *band = &res->bands[bandno];
 412                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 413
 414                 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
 415
 416                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 417                         int included, increment, n;
 418                         opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
 419                         opj_tcd_seg_t *seg = NULL;
 420                         /* if cblk not yet included before --> inclusion tagtree */
 421                         if (!cblk->numsegs) {
 422                                 included = tgt_decode(bio, prc->incltree, cblkno, layno + 1);
 423                                 /* else one bit */
 424                         } else {
 425                                 included = bio_read(bio, 1);
 426                         }
 427                         /* if cblk not included */
 428                         if (!included) {
 429                                 cblk->numnewpasses = 0;
 430                                 continue;
 431                         }
 432                         /* if cblk not yet included --> zero-bitplane tagtree */
 433                         if (!cblk->numsegs) {
 434                                 int i, numimsbs;
 435                                 for (i = 0; !tgt_decode(bio, prc->imsbtree, cblkno, i); i++) {
 436                                         ;
 437                                 }
 438                                 numimsbs = i - 1;
 439                                 cblk->numbps = band->numbps - numimsbs;
 440                                 cblk->numlenbits = 3;
 441                         }
 442                         /* number of coding passes */
 443                         cblk->numnewpasses = t2_getnumpasses(bio);
 444                         increment = t2_getcommacode(bio);
 445                         /* length indicator increment */
 446                         cblk->numlenbits += increment;
 447                         if (!cblk->numsegs) {
 448                                 seg = &cblk->segs[0];
 449                                 t2_init_seg(seg, tcp->tccps[compno].cblksty, 1);
 450                         } else {
 451                                 seg = &cblk->segs[cblk->numsegs - 1];
 452                                 if (seg->numpasses == seg->maxpasses) {
 453                                         t2_init_seg(++seg, tcp->tccps[compno].cblksty, 0);
 454                                 }
 455                         }
 456                         n = cblk->numnewpasses;
 457
 458                         do {
 459                                 seg->numnewpasses = int_min(seg->maxpasses - seg->numpasses, n);
 460                                 seg->newlen = bio_read(bio, cblk->numlenbits + int_floorlog2(seg->numnewpasses));
 461                                 n -= seg->numnewpasses;
 462                                 if (n > 0) {
 463                                         t2_init_seg(++seg, tcp->tccps[compno].cblksty, 0);
 464                                 }
 465                         } while (n > 0);
 466                 }
 467         }
 468
 469         if (bio_inalign(bio)) {
 470                 bio_destroy(bio);
 471                 return -999;
 472         }
 473
 474         hd += bio_numbytes(bio);
 475         bio_destroy(bio);
 476
 477         /* EPH markers */
 478         if (tcp->csty & J2K_CP_CSTY_EPH) {
 479                 if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
 480                         opj_event_msg(t2->cinfo, EVT_ERROR, "Expected EPH marker\n");
 481                 } else {
 482                         hd += 2;
 483                 }
 484         }
 485
 486         if (cp->ppm==1) {
 487                 cp->ppm_len+=cp->ppm_data-hd;
 488                 cp->ppm_data = hd;
 489         } else if (tcp->ppt == 1) {
 490                 tcp->ppt_len+=tcp->ppt_data-hd;
 491                 tcp->ppt_data = hd;
 492         } else {
 493                 c=hd;
 494         }
 495
 496         for (bandno = 0; bandno < res->numbands; bandno++) {
 497                 opj_tcd_band_t *band = &res->bands[bandno];
 498                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 499
 500                 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
 501
 502                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 503                         opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
 504                         opj_tcd_seg_t *seg = NULL;
 505                         if (!cblk->numnewpasses)
 506                                 continue;
 507                         if (!cblk->numsegs) {
 508                                 seg = &cblk->segs[0];
 509                                 cblk->numsegs++;
 510                                 cblk->len = 0;
 511                         } else {
 512                                 seg = &cblk->segs[cblk->numsegs - 1];
 513                                 if (seg->numpasses == seg->maxpasses) {
 514                                         seg++;
 515                                         cblk->numsegs++;
 516                                 }
 517                         }
 518
 519                         do {
 520                                 if (c + seg->newlen > src + len) {
 521                                         return -999;
 522                                 }
 523
 524 #ifdef USE_JPWL
 525                         /* we need here a j2k handle to verify if making a check to
 526                         the validity of cblocks parameters is selected from user (-W) */
 527
 528                                 /* let's check that we are not exceeding */
 529                                 if ((cblk->len + seg->newlen) > 8192) {
 530                                         opj_event_msg(t2->cinfo, EVT_WARNING,
 531                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
 532                                                 seg->newlen, cblkno, precno, bandno, resno, compno);
 533                                         if (!JPWL_ASSUME) {
 534                                                 opj_event_msg(t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
 535                                                 return -999;
 536                                         }
 537                                         seg->newlen = 8192 - cblk->len;
 538                                         opj_event_msg(t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", seg->newlen);
 539                                         break;
 540                                 };
 541
 542 #endif /* USE_JPWL */
 543
 544                                 memcpy(cblk->data + cblk->len, c, seg->newlen);
 545                                 if (seg->numpasses == 0) {
 546                                         seg->data = cblk->data + cblk->len;
 547                                 }
 548                                 c += seg->newlen;
 549                                 cblk->len += seg->newlen;
 550                                 seg->len += seg->newlen;
 551                                 seg->numpasses += seg->numnewpasses;
 552                                 cblk->numnewpasses -= seg->numnewpasses;
 553                                 if (cblk->numnewpasses > 0) {
 554                                         seg++;
 555                                         cblk->numsegs++;
 556                                 }
 557                         } while (cblk->numnewpasses > 0);
 558                 }
 559         }
 560
 561         return (c - src);
 562 }
 563
 564 /* ----------------------------------------------------------------------- */
 565
 566 int t2_encode_packets(opj_t2_t* t2,int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_image_info_t *image_info,int tpnum, int tppos,int pino, J2K_T2_MODE t2_mode){
 567         unsigned char *c = dest;
 568         int e = 0;
 569         int compno;
 570         int comp_len = 0;
 571         opj_pi_iterator_t *pi = NULL;
 572         int poc;
 573         opj_image_t *image = t2->image;
 574         opj_cp_t *cp = t2->cp;
 575         int pocno = cp->cinema == CINEMA4K_24? 2: 1;
 576         int maxcomp = cp->max_comp_size > 0 ? image->numcomps : 1;
 577
 578         pi = pi_initialise_encode(image, cp, tileno, t2_mode);
 579         if(!pi) {
 580                 /* TODO: throw an error */
 581                 return -999;
 582         }
 583
 584         if(t2_mode == THRESH_CALC ){ /* Calculating threshold */
 585                 for(compno = 0; compno < maxcomp; compno++ ){
 586                         for(poc = 0; poc < pocno ; poc++){
 587                                 int comp_len = 0;
 588                                 int tpnum = compno;
 589                                 pi_create_encode(pi, cp,tileno,poc,tpnum,tppos);
 590                                 while (pi_next(&pi[poc])) {
 591                                         if (pi[poc].layno < maxlayers) {
 592                                                 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[poc], c, dest + len - c, image_info, tileno);
 593                                                 comp_len = comp_len + e;
 594                                                 if (e == -999) {
 595                                                         break;
 596                                                 } else {
 597                                                         c += e;
 598                                                 }
 599                                         }
 600                                 }
 601                                 if (e == -999) break;
 602                                 if (cp->max_comp_size){
 603                                         if (comp_len > cp->max_comp_size){
 604                                                 e = -999;
 605                                                 break;
 606                                         }
 607                                 }
 608                         }
 609                         if (e == -999)  break;
 610                 }
 611         }else{  /* t2_mode == FINAL_PASS  */
 612                 pi_create_encode(pi, cp,tileno,pino,tpnum,tppos);
 613                 while (pi_next(&pi[pino])) {
 614                         if (pi[pino].layno < maxlayers) {
 615                                 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[pino], c, dest + len - c, image_info, tileno);
 616                                 if (e == -999) {
 617                                         break;
 618                                 } else {
 619                                         c += e;
 620                                 }
 621                                 /* INDEX >> */
 622                                 if(image_info && image_info->index_on) {
 623                                         if(image_info->index_write) {
 624                                                 opj_tile_info_t *info_TL = &image_info->tile[tileno];
 625                                                 opj_packet_info_t *info_PK = &info_TL->packet[image_info->num];
 626                                                 if (!image_info->num) {
 627                                                         info_PK->start_pos = info_TL->end_header + 1;
 628                                                 } else {
 629                                                         info_PK->start_pos = (cp->tp_on && info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[image_info->num - 1].end_pos + 1;
 630                                                 }
 631                                                 info_PK->end_pos = info_PK->start_pos + e - 1;
 632                                         }
 633
 634                                         image_info->num++;
 635                                 }
 636                                 /* << INDEX */
 637                         }
 638                 }
 639         }
 640
 641         pi_destroy(pi, cp, tileno);
 642
 643         if (e == -999) {
 644                 return e;
 645         }
 646
 647   return (c - dest);
 648 }
 649
 650 int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile) {
 651         unsigned char *c = src;
 652         opj_pi_iterator_t *pi;
 653         int pino, e = 0;
 654         int n = 0;
 655
 656         opj_image_t *image = t2->image;
 657         opj_cp_t *cp = t2->cp;
 658
 659         /* create a packet iterator */
 660         pi = pi_create_decode(image, cp, tileno);
 661         if(!pi) {
 662                 /* TODO: throw an error */
 663                 return -999;
 664         }
 665
 666         for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) {
 667                 while (pi_next(&pi[pino])) {
 668                         if ((cp->layer==0) || (cp->layer>=((pi[pino].layno)+1))) {
 669                                 e = t2_decode_packet(t2, c, src + len - c, tile, &cp->tcps[tileno], &pi[pino]);
 670                         } else {
 671                                 e = 0;
 672                         }
 673
 674                         /* progression in resolution */
 675                         image->comps[pi[pino].compno].resno_decoded =
 676                                 (e > 0) ?
 677                                 int_max(pi[pino].resno, image->comps[pi[pino].compno].resno_decoded)
 678                                 : image->comps[pi[pino].compno].resno_decoded;
 679                         n++;
 680
 681                         if (e == -999) {                /* ADD */
 682                                 break;
 683                         } else {
 684                                 c += e;
 685                         }
 686                 }
 687         }
 688
 689         /* don't forget to release pi */
 690         pi_destroy(pi, cp, tileno);
 691
 692         if (e == -999) {
 693                 return e;
 694         }
 695
 696     return (c - src);
 697 }
 698
 699 /* ----------------------------------------------------------------------- */
 700
 701 opj_t2_t* t2_create(opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp) {
 702         /* create the tcd structure */
 703         opj_t2_t *t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
 704         if(!t2) return NULL;
 705         t2->cinfo = cinfo;
 706         t2->image = image;
 707         t2->cp = cp;
 708
 709         return t2;
 710 }
 711
 712 void t2_destroy(opj_t2_t *t2) {
 713         if(t2) {
 714                 opj_free(t2);
 715         }
 716 }
 717