src/lib/openjp2/t2.c

   1 /*
   2  * The copyright in this software is being made available under the 2-clauses
   3  * BSD License, included below. This software may be subject to other third
   4  * party and contributor rights, including patent rights, and no such rights
   5  * are granted under this license.
   6  *
   7  * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
   8  * Copyright (c) 2002-2014, Professor Benoit Macq
   9  * Copyright (c) 2001-2003, David Janssens
  10  * Copyright (c) 2002-2003, Yannick Verschueren
  11  * Copyright (c) 2003-2007, Francois-Olivier Devaux
  12  * Copyright (c) 2003-2014, Antonin Descampe
  13  * Copyright (c) 2005, Herve Drolon, FreeImage Team
  14  * Copyright (c) 2008, 2011-2012, Centre National d'Etudes Spatiales (CNES), FR
  15  * Copyright (c) 2012, CS Systemes d'Information, France
  16  * Copyright (c) 2017, IntoPIX SA <support@intopix.com>
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions
  21  * are met:
  22  * 1. Redistributions of source code must retain the above copyright
  23  *    notice, this list of conditions and the following disclaimer.
  24  * 2. Redistributions in binary form must reproduce the above copyright
  25  *    notice, this list of conditions and the following disclaimer in the
  26  *    documentation and/or other materials provided with the distribution.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  29  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  32  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38  * POSSIBILITY OF SUCH DAMAGE.
  39  */
  40
  41 #include "opj_includes.h"
  42 #include "opj_common.h"
  43
  44
  45 /** @defgroup T2 T2 - Implementation of a tier-2 coding */
  46 /*@{*/
  47
  48 /** @name Local static functions */
  49 /*@{*/
  50
  51 static void opj_t2_putcommacode(opj_bio_t *bio, OPJ_INT32 n);
  52
  53 static OPJ_UINT32 opj_t2_getcommacode(opj_bio_t *bio);
  54 /**
  55 Variable length code for signalling delta Zil (truncation point)
  56 @param bio  Bit Input/Output component
  57 @param n    delta Zil
  58 */
  59 static void opj_t2_putnumpasses(opj_bio_t *bio, OPJ_UINT32 n);
  60 static OPJ_UINT32 opj_t2_getnumpasses(opj_bio_t *bio);
  61
  62 /**
  63 Encode a packet of a tile to a destination buffer
  64 @param tileno Number of the tile encoded
  65 @param tile Tile for which to write the packets
  66 @param tcp Tile coding parameters
  67 @param pi Packet identity
  68 @param dest Destination buffer
  69 @param p_data_written   FIXME DOC
  70 @param len Length of the destination buffer
  71 @param cstr_info Codestream information structure
  72 @param p_t2_mode If == THRESH_CALC In Threshold calculation ,If == FINAL_PASS Final pass
  73 @param p_manager the user event manager
  74 @return
  75 */
  76 static OPJ_BOOL opj_t2_encode_packet(OPJ_UINT32 tileno,
  77                                      opj_tcd_tile_t *tile,
  78                                      opj_tcp_t *tcp,
  79                                      opj_pi_iterator_t *pi,
  80                                      OPJ_BYTE *dest,
  81                                      OPJ_UINT32 * p_data_written,
  82                                      OPJ_UINT32 len,
  83                                      opj_codestream_info_t *cstr_info,
  84                                      J2K_T2_MODE p_t2_mode,
  85                                      opj_event_mgr_t *p_manager);
  86
  87 /**
  88 Decode a packet of a tile from a source buffer
  89 @param t2 T2 handle
  90 @param tile Tile for which to write the packets
  91 @param tcp Tile coding parameters
  92 @param pi Packet identity
  93 @param src Source buffer
  94 @param data_read   FIXME DOC
  95 @param max_length  FIXME DOC
  96 @param pack_info Packet information
  97 @param p_manager the user event manager
  98
  99 @return  FIXME DOC
 100 */
 101 static OPJ_BOOL opj_t2_decode_packet(opj_t2_t* t2,
 102                                      opj_tcd_tile_t *tile,
 103                                      opj_tcp_t *tcp,
 104                                      opj_pi_iterator_t *pi,
 105                                      OPJ_BYTE *src,
 106                                      OPJ_UINT32 * data_read,
 107                                      OPJ_UINT32 max_length,
 108                                      opj_packet_info_t *pack_info,
 109                                      opj_event_mgr_t *p_manager);
 110
 111 static OPJ_BOOL opj_t2_skip_packet(opj_t2_t* p_t2,
 112                                    opj_tcd_tile_t *p_tile,
 113                                    opj_tcp_t *p_tcp,
 114                                    opj_pi_iterator_t *p_pi,
 115                                    OPJ_BYTE *p_src,
 116                                    OPJ_UINT32 * p_data_read,
 117                                    OPJ_UINT32 p_max_length,
 118                                    opj_packet_info_t *p_pack_info,
 119                                    opj_event_mgr_t *p_manager);
 120
 121 static OPJ_BOOL opj_t2_read_packet_header(opj_t2_t* p_t2,
 122         opj_tcd_tile_t *p_tile,
 123         opj_tcp_t *p_tcp,
 124         opj_pi_iterator_t *p_pi,
 125         OPJ_BOOL * p_is_data_present,
 126         OPJ_BYTE *p_src_data,
 127         OPJ_UINT32 * p_data_read,
 128         OPJ_UINT32 p_max_length,
 129         opj_packet_info_t *p_pack_info,
 130         opj_event_mgr_t *p_manager);
 131
 132 static OPJ_BOOL opj_t2_read_packet_data(opj_t2_t* p_t2,
 133                                         opj_tcd_tile_t *p_tile,
 134                                         opj_pi_iterator_t *p_pi,
 135                                         OPJ_BYTE *p_src_data,
 136                                         OPJ_UINT32 * p_data_read,
 137                                         OPJ_UINT32 p_max_length,
 138                                         opj_packet_info_t *pack_info,
 139                                         opj_event_mgr_t *p_manager);
 140
 141 static OPJ_BOOL opj_t2_skip_packet_data(opj_t2_t* p_t2,
 142                                         opj_tcd_tile_t *p_tile,
 143                                         opj_pi_iterator_t *p_pi,
 144                                         OPJ_UINT32 * p_data_read,
 145                                         OPJ_UINT32 p_max_length,
 146                                         opj_packet_info_t *pack_info,
 147                                         opj_event_mgr_t *p_manager);
 148
 149 /**
 150 @param cblk
 151 @param index
 152 @param cblksty
 153 @param first
 154 */
 155 static OPJ_BOOL opj_t2_init_seg(opj_tcd_cblk_dec_t* cblk,
 156                                 OPJ_UINT32 index,
 157                                 OPJ_UINT32 cblksty,
 158                                 OPJ_UINT32 first);
 159
 160 /*@}*/
 161
 162 /*@}*/
 163
 164 /* ----------------------------------------------------------------------- */
 165
 166 /* #define RESTART 0x04 */
 167 static void opj_t2_putcommacode(opj_bio_t *bio, OPJ_INT32 n)
 168 {
 169     while (--n >= 0) {
 170         opj_bio_putbit(bio, 1);
 171     }
 172     opj_bio_putbit(bio, 0);
 173 }
 174
 175 static OPJ_UINT32 opj_t2_getcommacode(opj_bio_t *bio)
 176 {
 177     OPJ_UINT32 n = 0;
 178     while (opj_bio_read(bio, 1)) {
 179         ++n;
 180     }
 181     return n;
 182 }
 183
 184 static void opj_t2_putnumpasses(opj_bio_t *bio, OPJ_UINT32 n)
 185 {
 186     if (n == 1) {
 187         opj_bio_putbit(bio, 0);
 188     } else if (n == 2) {
 189         opj_bio_write(bio, 2, 2);
 190     } else if (n <= 5) {
 191         opj_bio_write(bio, 0xc | (n - 3), 4);
 192     } else if (n <= 36) {
 193         opj_bio_write(bio, 0x1e0 | (n - 6), 9);
 194     } else if (n <= 164) {
 195         opj_bio_write(bio, 0xff80 | (n - 37), 16);
 196     }
 197 }
 198
 199 static OPJ_UINT32 opj_t2_getnumpasses(opj_bio_t *bio)
 200 {
 201     OPJ_UINT32 n;
 202     if (!opj_bio_read(bio, 1)) {
 203         return 1;
 204     }
 205     if (!opj_bio_read(bio, 1)) {
 206         return 2;
 207     }
 208     if ((n = opj_bio_read(bio, 2)) != 3) {
 209         return (3 + n);
 210     }
 211     if ((n = opj_bio_read(bio, 5)) != 31) {
 212         return (6 + n);
 213     }
 214     return (37 + opj_bio_read(bio, 7));
 215 }
 216
 217 /* ----------------------------------------------------------------------- */
 218
 219 OPJ_BOOL opj_t2_encode_packets(opj_t2_t* p_t2,
 220                                OPJ_UINT32 p_tile_no,
 221                                opj_tcd_tile_t *p_tile,
 222                                OPJ_UINT32 p_maxlayers,
 223                                OPJ_BYTE *p_dest,
 224                                OPJ_UINT32 * p_data_written,
 225                                OPJ_UINT32 p_max_len,
 226                                opj_codestream_info_t *cstr_info,
 227                                opj_tcd_marker_info_t* p_marker_info,
 228                                OPJ_UINT32 p_tp_num,
 229                                OPJ_INT32 p_tp_pos,
 230                                OPJ_UINT32 p_pino,
 231                                J2K_T2_MODE p_t2_mode,
 232                                opj_event_mgr_t *p_manager)
 233 {
 234     OPJ_BYTE *l_current_data = p_dest;
 235     OPJ_UINT32 l_nb_bytes = 0;
 236     OPJ_UINT32 compno;
 237     OPJ_UINT32 poc;
 238     opj_pi_iterator_t *l_pi = 00;
 239     opj_pi_iterator_t *l_current_pi = 00;
 240     opj_image_t *l_image = p_t2->image;
 241     opj_cp_t *l_cp = p_t2->cp;
 242     opj_tcp_t *l_tcp = &l_cp->tcps[p_tile_no];
 243     OPJ_UINT32 pocno = (l_cp->rsiz == OPJ_PROFILE_CINEMA_4K) ? 2 : 1;
 244     OPJ_UINT32 l_max_comp = l_cp->m_specific_param.m_enc.m_max_comp_size > 0 ?
 245                             l_image->numcomps : 1;
 246     OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 247
 248     l_pi = opj_pi_initialise_encode(l_image, l_cp, p_tile_no, p_t2_mode, p_manager);
 249     if (!l_pi) {
 250         return OPJ_FALSE;
 251     }
 252
 253     * p_data_written = 0;
 254
 255     if (p_t2_mode == THRESH_CALC) { /* Calculating threshold */
 256         l_current_pi = l_pi;
 257
 258         for (compno = 0; compno < l_max_comp; ++compno) {
 259             OPJ_UINT32 l_comp_len = 0;
 260             l_current_pi = l_pi;
 261
 262             for (poc = 0; poc < pocno ; ++poc) {
 263                 OPJ_UINT32 l_tp_num = compno;
 264
 265                 /* TODO MSD : check why this function cannot fail (cf. v1) */
 266                 opj_pi_create_encode(l_pi, l_cp, p_tile_no, poc, l_tp_num, p_tp_pos, p_t2_mode);
 267
 268                 if (l_current_pi->poc.prg == OPJ_PROG_UNKNOWN) {
 269                     /* TODO ADE : add an error */
 270                     opj_pi_destroy(l_pi, l_nb_pocs);
 271                     return OPJ_FALSE;
 272                 }
 273                 while (opj_pi_next(l_current_pi)) {
 274                     if (l_current_pi->layno < p_maxlayers) {
 275                         l_nb_bytes = 0;
 276
 277                         if (! opj_t2_encode_packet(p_tile_no, p_tile, l_tcp, l_current_pi,
 278                                                    l_current_data, &l_nb_bytes,
 279                                                    p_max_len, cstr_info,
 280                                                    p_t2_mode,
 281                                                    p_manager)) {
 282                             opj_pi_destroy(l_pi, l_nb_pocs);
 283                             return OPJ_FALSE;
 284                         }
 285
 286                         l_comp_len += l_nb_bytes;
 287                         l_current_data += l_nb_bytes;
 288                         p_max_len -= l_nb_bytes;
 289
 290                         * p_data_written += l_nb_bytes;
 291                     }
 292                 }
 293
 294                 if (l_cp->m_specific_param.m_enc.m_max_comp_size) {
 295                     if (l_comp_len > l_cp->m_specific_param.m_enc.m_max_comp_size) {
 296                         opj_pi_destroy(l_pi, l_nb_pocs);
 297                         return OPJ_FALSE;
 298                     }
 299                 }
 300
 301                 ++l_current_pi;
 302             }
 303         }
 304     } else { /* t2_mode == FINAL_PASS  */
 305         opj_pi_create_encode(l_pi, l_cp, p_tile_no, p_pino, p_tp_num, p_tp_pos,
 306                              p_t2_mode);
 307
 308         l_current_pi = &l_pi[p_pino];
 309         if (l_current_pi->poc.prg == OPJ_PROG_UNKNOWN) {
 310             /* TODO ADE : add an error */
 311             opj_pi_destroy(l_pi, l_nb_pocs);
 312             return OPJ_FALSE;
 313         }
 314
 315         if (p_marker_info && p_marker_info->need_PLT) {
 316             /* One time use intended */
 317             assert(p_marker_info->packet_count == 0);
 318             assert(p_marker_info->p_packet_size == NULL);
 319
 320             p_marker_info->p_packet_size = (OPJ_UINT32*) opj_malloc(
 321                                                opj_get_encoding_packet_count(l_image, l_cp, p_tile_no) * sizeof(OPJ_UINT32));
 322             if (p_marker_info->p_packet_size == NULL) {
 323                 opj_pi_destroy(l_pi, l_nb_pocs);
 324                 return OPJ_FALSE;
 325             }
 326         }
 327
 328         while (opj_pi_next(l_current_pi)) {
 329             if (l_current_pi->layno < p_maxlayers) {
 330                 l_nb_bytes = 0;
 331
 332                 if (! opj_t2_encode_packet(p_tile_no, p_tile, l_tcp, l_current_pi,
 333                                            l_current_data, &l_nb_bytes, p_max_len,
 334                                            cstr_info, p_t2_mode, p_manager)) {
 335                     opj_pi_destroy(l_pi, l_nb_pocs);
 336                     return OPJ_FALSE;
 337                 }
 338
 339                 l_current_data += l_nb_bytes;
 340                 p_max_len -= l_nb_bytes;
 341
 342                 * p_data_written += l_nb_bytes;
 343
 344                 if (p_marker_info && p_marker_info->need_PLT) {
 345                     p_marker_info->p_packet_size[p_marker_info->packet_count] = l_nb_bytes;
 346                     p_marker_info->packet_count ++;
 347                 }
 348
 349                 /* INDEX >> */
 350                 if (cstr_info) {
 351                     if (cstr_info->index_write) {
 352                         opj_tile_info_t *info_TL = &cstr_info->tile[p_tile_no];
 353                         opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno];
 354                         if (!cstr_info->packno) {
 355                             info_PK->start_pos = info_TL->end_header + 1;
 356                         } else {
 357                             info_PK->start_pos = ((l_cp->m_specific_param.m_enc.m_tp_on | l_tcp->POC) &&
 358                                                   info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[cstr_info->packno -
 359                                                                             1].end_pos + 1;
 360                         }
 361                         info_PK->end_pos = info_PK->start_pos + l_nb_bytes - 1;
 362                         info_PK->end_ph_pos += info_PK->start_pos -
 363                                                1;  /* End of packet header which now only represents the distance
 364                                                                                                                                                                                                                                                    to start of packet is incremented by value of start of packet*/
 365                     }
 366
 367                     cstr_info->packno++;
 368                 }
 369                 /* << INDEX */
 370                 ++p_tile->packno;
 371             }
 372         }
 373     }
 374
 375     opj_pi_destroy(l_pi, l_nb_pocs);
 376
 377     return OPJ_TRUE;
 378 }
 379
 380 /* see issue 80 */
 381 #if 0
 382 #define JAS_FPRINTF fprintf
 383 #else
 384 /* issue 290 */
 385 static void opj_null_jas_fprintf(FILE* file, const char * format, ...)
 386 {
 387     (void)file;
 388     (void)format;
 389 }
 390 #define JAS_FPRINTF opj_null_jas_fprintf
 391 #endif
 392
 393 OPJ_BOOL opj_t2_decode_packets(opj_tcd_t* tcd,
 394                                opj_t2_t *p_t2,
 395                                OPJ_UINT32 p_tile_no,
 396                                opj_tcd_tile_t *p_tile,
 397                                OPJ_BYTE *p_src,
 398                                OPJ_UINT32 * p_data_read,
 399                                OPJ_UINT32 p_max_len,
 400                                opj_codestream_index_t *p_cstr_index,
 401                                opj_event_mgr_t *p_manager)
 402 {
 403     OPJ_BYTE *l_current_data = p_src;
 404     opj_pi_iterator_t *l_pi = 00;
 405     OPJ_UINT32 pino;
 406     opj_image_t *l_image = p_t2->image;
 407     opj_cp_t *l_cp = p_t2->cp;
 408     opj_tcp_t *l_tcp = &(p_t2->cp->tcps[p_tile_no]);
 409     OPJ_UINT32 l_nb_bytes_read;
 410     OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 411     opj_pi_iterator_t *l_current_pi = 00;
 412 #ifdef TODO_MSD
 413     OPJ_UINT32 curtp = 0;
 414     OPJ_UINT32 tp_start_packno;
 415 #endif
 416     opj_packet_info_t *l_pack_info = 00;
 417     opj_image_comp_t* l_img_comp = 00;
 418
 419     OPJ_ARG_NOT_USED(p_cstr_index);
 420
 421 #ifdef TODO_MSD
 422     if (p_cstr_index) {
 423         l_pack_info = p_cstr_index->tile_index[p_tile_no].packet;
 424     }
 425 #endif
 426
 427     /* create a packet iterator */
 428     l_pi = opj_pi_create_decode(l_image, l_cp, p_tile_no, p_manager);
 429     if (!l_pi) {
 430         return OPJ_FALSE;
 431     }
 432
 433
 434     l_current_pi = l_pi;
 435
 436     for (pino = 0; pino <= l_tcp->numpocs; ++pino) {
 437
 438         /* if the resolution needed is too low, one dim of the tilec could be equal to zero
 439          * and no packets are used to decode this resolution and
 440          * l_current_pi->resno is always >= p_tile->comps[l_current_pi->compno].minimum_num_resolutions
 441          * and no l_img_comp->resno_decoded are computed
 442          */
 443         OPJ_BOOL* first_pass_failed = NULL;
 444
 445         if (l_current_pi->poc.prg == OPJ_PROG_UNKNOWN) {
 446             /* TODO ADE : add an error */
 447             opj_pi_destroy(l_pi, l_nb_pocs);
 448             return OPJ_FALSE;
 449         }
 450
 451         first_pass_failed = (OPJ_BOOL*)opj_malloc(l_image->numcomps * sizeof(OPJ_BOOL));
 452         if (!first_pass_failed) {
 453             opj_pi_destroy(l_pi, l_nb_pocs);
 454             return OPJ_FALSE;
 455         }
 456         memset(first_pass_failed, OPJ_TRUE, l_image->numcomps * sizeof(OPJ_BOOL));
 457
 458         while (opj_pi_next(l_current_pi)) {
 459             OPJ_BOOL skip_packet = OPJ_FALSE;
 460             JAS_FPRINTF(stderr,
 461                         "packet offset=00000166 prg=%d cmptno=%02d rlvlno=%02d prcno=%03d lyrno=%02d\n\n",
 462                         l_current_pi->poc.prg1, l_current_pi->compno, l_current_pi->resno,
 463                         l_current_pi->precno, l_current_pi->layno);
 464
 465             /* If the packet layer is greater or equal than the maximum */
 466             /* number of layers, skip the packet */
 467             if (l_current_pi->layno >= l_tcp->num_layers_to_decode) {
 468                 skip_packet = OPJ_TRUE;
 469             }
 470             /* If the packet resolution number is greater than the minimum */
 471             /* number of resolution allowed, skip the packet */
 472             else if (l_current_pi->resno >=
 473                      p_tile->comps[l_current_pi->compno].minimum_num_resolutions) {
 474                 skip_packet = OPJ_TRUE;
 475             } else {
 476                 /* If no precincts of any band intersects the area of interest, */
 477                 /* skip the packet */
 478                 OPJ_UINT32 bandno;
 479                 opj_tcd_tilecomp_t *tilec = &p_tile->comps[l_current_pi->compno];
 480                 opj_tcd_resolution_t *res = &tilec->resolutions[l_current_pi->resno];
 481
 482                 skip_packet = OPJ_TRUE;
 483                 for (bandno = 0; bandno < res->numbands; ++bandno) {
 484                     opj_tcd_band_t* band = &res->bands[bandno];
 485                     opj_tcd_precinct_t* prec = &band->precincts[l_current_pi->precno];
 486
 487                     if (opj_tcd_is_subband_area_of_interest(tcd,
 488                                                             l_current_pi->compno,
 489                                                             l_current_pi->resno,
 490                                                             band->bandno,
 491                                                             (OPJ_UINT32)prec->x0,
 492                                                             (OPJ_UINT32)prec->y0,
 493                                                             (OPJ_UINT32)prec->x1,
 494                                                             (OPJ_UINT32)prec->y1)) {
 495                         skip_packet = OPJ_FALSE;
 496                         break;
 497                     }
 498                 }
 499                 /*
 500                                 printf("packet cmptno=%02d rlvlno=%02d prcno=%03d lyrno=%02d -> %s\n",
 501                                     l_current_pi->compno, l_current_pi->resno,
 502                                     l_current_pi->precno, l_current_pi->layno, skip_packet ? "skipped" : "kept");
 503                 */
 504             }
 505             if (!skip_packet) {
 506                 l_nb_bytes_read = 0;
 507
 508                 first_pass_failed[l_current_pi->compno] = OPJ_FALSE;
 509
 510                 if (! opj_t2_decode_packet(p_t2, p_tile, l_tcp, l_current_pi, l_current_data,
 511                                            &l_nb_bytes_read, p_max_len, l_pack_info, p_manager)) {
 512                     opj_pi_destroy(l_pi, l_nb_pocs);
 513                     opj_free(first_pass_failed);
 514                     return OPJ_FALSE;
 515                 }
 516
 517                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 518                 l_img_comp->resno_decoded = opj_uint_max(l_current_pi->resno,
 519                                             l_img_comp->resno_decoded);
 520             } else {
 521                 l_nb_bytes_read = 0;
 522                 if (! opj_t2_skip_packet(p_t2, p_tile, l_tcp, l_current_pi, l_current_data,
 523                                          &l_nb_bytes_read, p_max_len, l_pack_info, p_manager)) {
 524                     opj_pi_destroy(l_pi, l_nb_pocs);
 525                     opj_free(first_pass_failed);
 526                     return OPJ_FALSE;
 527                 }
 528             }
 529
 530             if (first_pass_failed[l_current_pi->compno]) {
 531                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 532                 if (l_img_comp->resno_decoded == 0) {
 533                     l_img_comp->resno_decoded =
 534                         p_tile->comps[l_current_pi->compno].minimum_num_resolutions - 1;
 535                 }
 536             }
 537
 538             l_current_data += l_nb_bytes_read;
 539             p_max_len -= l_nb_bytes_read;
 540
 541             /* INDEX >> */
 542 #ifdef TODO_MSD
 543             if (p_cstr_info) {
 544                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 545                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 546                 tp_start_packno = 0;
 547                 if (!p_cstr_info->packno) {
 548                     info_PK->start_pos = info_TL->end_header + 1;
 549                 } else if (info_TL->packet[p_cstr_info->packno - 1].end_pos >=
 550                            (OPJ_INT32)
 551                            p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_pos) { /* New tile part */
 552                     info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno -
 553                                                      tp_start_packno; /* Number of packets in previous tile-part */
 554                     tp_start_packno = p_cstr_info->packno;
 555                     curtp++;
 556                     info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header + 1;
 557                 } else {
 558                     info_PK->start_pos = (l_cp->m_specific_param.m_enc.m_tp_on &&
 559                                           info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[p_cstr_info->packno -
 560                                                                       1].end_pos + 1;
 561                 }
 562                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 563                 info_PK->end_ph_pos += info_PK->start_pos -
 564                                        1;  /* End of packet header which now only represents the distance */
 565                 ++p_cstr_info->packno;
 566             }
 567 #endif
 568             /* << INDEX */
 569         }
 570         ++l_current_pi;
 571
 572         opj_free(first_pass_failed);
 573     }
 574     /* INDEX >> */
 575 #ifdef TODO_MSD
 576     if
 577     (p_cstr_info) {
 578         p_cstr_info->tile[p_tile_no].tp[curtp].tp_numpacks = p_cstr_info->packno -
 579                 tp_start_packno; /* Number of packets in last tile-part */
 580     }
 581 #endif
 582     /* << INDEX */
 583
 584     /* don't forget to release pi */
 585     opj_pi_destroy(l_pi, l_nb_pocs);
 586     *p_data_read = (OPJ_UINT32)(l_current_data - p_src);
 587     return OPJ_TRUE;
 588 }
 589
 590 /* ----------------------------------------------------------------------- */
 591
 592 /**
 593  * Creates a Tier 2 handle
 594  *
 595  * @param       p_image         Source or destination image
 596  * @param       p_cp            Image coding parameters.
 597  * @return              a new T2 handle if successful, NULL otherwise.
 598 */
 599 opj_t2_t* opj_t2_create(opj_image_t *p_image, opj_cp_t *p_cp)
 600 {
 601     /* create the t2 structure */
 602     opj_t2_t *l_t2 = (opj_t2_t*)opj_calloc(1, sizeof(opj_t2_t));
 603     if (!l_t2) {
 604         return NULL;
 605     }
 606
 607     l_t2->image = p_image;
 608     l_t2->cp = p_cp;
 609
 610     return l_t2;
 611 }
 612
 613 void opj_t2_destroy(opj_t2_t *t2)
 614 {
 615     if (t2) {
 616         opj_free(t2);
 617     }
 618 }
 619
 620 static OPJ_BOOL opj_t2_decode_packet(opj_t2_t* p_t2,
 621                                      opj_tcd_tile_t *p_tile,
 622                                      opj_tcp_t *p_tcp,
 623                                      opj_pi_iterator_t *p_pi,
 624                                      OPJ_BYTE *p_src,
 625                                      OPJ_UINT32 * p_data_read,
 626                                      OPJ_UINT32 p_max_length,
 627                                      opj_packet_info_t *p_pack_info,
 628                                      opj_event_mgr_t *p_manager)
 629 {
 630     OPJ_BOOL l_read_data;
 631     OPJ_UINT32 l_nb_bytes_read = 0;
 632     OPJ_UINT32 l_nb_total_bytes_read = 0;
 633
 634     *p_data_read = 0;
 635
 636     if (! opj_t2_read_packet_header(p_t2, p_tile, p_tcp, p_pi, &l_read_data, p_src,
 637                                     &l_nb_bytes_read, p_max_length, p_pack_info, p_manager)) {
 638         return OPJ_FALSE;
 639     }
 640
 641     p_src += l_nb_bytes_read;
 642     l_nb_total_bytes_read += l_nb_bytes_read;
 643     p_max_length -= l_nb_bytes_read;
 644
 645     /* we should read data for the packet */
 646     if (l_read_data) {
 647         l_nb_bytes_read = 0;
 648
 649         if (! opj_t2_read_packet_data(p_t2, p_tile, p_pi, p_src, &l_nb_bytes_read,
 650                                       p_max_length, p_pack_info, p_manager)) {
 651             return OPJ_FALSE;
 652         }
 653
 654         l_nb_total_bytes_read += l_nb_bytes_read;
 655     }
 656
 657     *p_data_read = l_nb_total_bytes_read;
 658
 659     return OPJ_TRUE;
 660 }
 661
 662 static OPJ_BOOL opj_t2_encode_packet(OPJ_UINT32 tileno,
 663                                      opj_tcd_tile_t * tile,
 664                                      opj_tcp_t * tcp,
 665                                      opj_pi_iterator_t *pi,
 666                                      OPJ_BYTE *dest,
 667                                      OPJ_UINT32 * p_data_written,
 668                                      OPJ_UINT32 length,
 669                                      opj_codestream_info_t *cstr_info,
 670                                      J2K_T2_MODE p_t2_mode,
 671                                      opj_event_mgr_t *p_manager)
 672 {
 673     OPJ_UINT32 bandno, cblkno;
 674     OPJ_BYTE* c = dest;
 675     OPJ_UINT32 l_nb_bytes;
 676     OPJ_UINT32 compno = pi->compno;     /* component value */
 677     OPJ_UINT32 resno  = pi->resno;      /* resolution level value */
 678     OPJ_UINT32 precno = pi->precno;     /* precinct value */
 679     OPJ_UINT32 layno  = pi->layno;      /* quality layer value */
 680     OPJ_UINT32 l_nb_blocks;
 681     opj_tcd_band_t *band = 00;
 682     opj_tcd_cblk_enc_t* cblk = 00;
 683     opj_tcd_pass_t *pass = 00;
 684
 685     opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 686     opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 687
 688     opj_bio_t *bio = 00;    /* BIO component */
 689 #ifdef ENABLE_EMPTY_PACKET_OPTIMIZATION
 690     OPJ_BOOL packet_empty = OPJ_TRUE;
 691 #else
 692     OPJ_BOOL packet_empty = OPJ_FALSE;
 693 #endif
 694
 695 #ifdef DEBUG_VERBOSE
 696     if (p_t2_mode == FINAL_PASS) {
 697         fprintf(stderr,
 698                 "encode packet compono=%d, resno=%d, precno=%d, layno=%d\n",
 699                 compno, resno, precno, layno);
 700     }
 701 #endif
 702
 703     /* <SOP 0xff91> */
 704     if (tcp->csty & J2K_CP_CSTY_SOP) {
 705         if (length < 6) {
 706             if (p_t2_mode == FINAL_PASS) {
 707                 opj_event_msg(p_manager, EVT_ERROR,
 708                               "opj_t2_encode_packet(): only %u bytes remaining in "
 709                               "output buffer. %u needed.\n",
 710                               length, 6);
 711             }
 712             return OPJ_FALSE;
 713         }
 714         c[0] = 255;
 715         c[1] = 145;
 716         c[2] = 0;
 717         c[3] = 4;
 718 #if 0
 719         c[4] = (tile->packno % 65536) / 256;
 720         c[5] = (tile->packno % 65536) % 256;
 721 #else
 722         c[4] = (tile->packno >> 8) & 0xff; /* packno is uint32_t */
 723         c[5] = tile->packno & 0xff;
 724 #endif
 725         c += 6;
 726         length -= 6;
 727     }
 728     /* </SOP> */
 729
 730     if (!layno) {
 731         band = res->bands;
 732
 733         for (bandno = 0; bandno < res->numbands; ++bandno, ++band) {
 734             opj_tcd_precinct_t *prc;
 735
 736             /* Skip empty bands */
 737             if (opj_tcd_is_band_empty(band)) {
 738                 continue;
 739             }
 740
 741             /* Avoid out of bounds access of https://github.com/uclouvain/openjpeg/issues/1294 */
 742             /* but likely not a proper fix. */
 743             if (precno >= res->pw * res->ph) {
 744                 opj_event_msg(p_manager, EVT_ERROR,
 745                               "opj_t2_encode_packet(): accessing precno=%u >= %u\n",
 746                               precno, res->pw * res->ph);
 747                 return OPJ_FALSE;
 748             }
 749
 750             prc = &band->precincts[precno];
 751             opj_tgt_reset(prc->incltree);
 752             opj_tgt_reset(prc->imsbtree);
 753
 754             l_nb_blocks = prc->cw * prc->ch;
 755             for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 756                 cblk = &prc->cblks.enc[cblkno];
 757
 758                 cblk->numpasses = 0;
 759                 opj_tgt_setvalue(prc->imsbtree, cblkno, band->numbps - (OPJ_INT32)cblk->numbps);
 760             }
 761         }
 762     }
 763
 764     bio = opj_bio_create();
 765     if (!bio) {
 766         /* FIXME event manager error callback */
 767         return OPJ_FALSE;
 768     }
 769     opj_bio_init_enc(bio, c, length);
 770
 771 #ifdef ENABLE_EMPTY_PACKET_OPTIMIZATION
 772     /* WARNING: this code branch is disabled, since it has been reported that */
 773     /* such packets cause decoding issues with cinema J2K hardware */
 774     /* decoders: https://groups.google.com/forum/#!topic/openjpeg/M7M_fLX_Bco */
 775
 776     /* Check if the packet is empty */
 777     /* Note: we could also skip that step and always write a packet header */
 778     band = res->bands;
 779     for (bandno = 0; bandno < res->numbands; ++bandno, ++band) {
 780         opj_tcd_precinct_t *prc;
 781         /* Skip empty bands */
 782         if (opj_tcd_is_band_empty(band)) {
 783             continue;
 784         }
 785
 786         prc = &band->precincts[precno];
 787         l_nb_blocks = prc->cw * prc->ch;
 788         cblk = prc->cblks.enc;
 789         for (cblkno = 0; cblkno < l_nb_blocks; cblkno++, ++cblk) {
 790             opj_tcd_layer_t *layer = &cblk->layers[layno];
 791
 792             /* if cblk not included, go to the next cblk  */
 793             if (!layer->numpasses) {
 794                 continue;
 795             }
 796             packet_empty = OPJ_FALSE;
 797             break;
 798         }
 799         if (!packet_empty) {
 800             break;
 801         }
 802     }
 803 #endif
 804     opj_bio_putbit(bio, packet_empty ? 0 : 1);           /* Empty header bit */
 805
 806     /* Writing Packet header */
 807     band = res->bands;
 808     for (bandno = 0; !packet_empty &&
 809             bandno < res->numbands; ++bandno, ++band)      {
 810         opj_tcd_precinct_t *prc;
 811
 812         /* Skip empty bands */
 813         if (opj_tcd_is_band_empty(band)) {
 814             continue;
 815         }
 816
 817         /* Avoid out of bounds access of https://github.com/uclouvain/openjpeg/issues/1297 */
 818         /* but likely not a proper fix. */
 819         if (precno >= res->pw * res->ph) {
 820             opj_event_msg(p_manager, EVT_ERROR,
 821                           "opj_t2_encode_packet(): accessing precno=%u >= %u\n",
 822                           precno, res->pw * res->ph);
 823             return OPJ_FALSE;
 824         }
 825
 826         prc = &band->precincts[precno];
 827         l_nb_blocks = prc->cw * prc->ch;
 828         cblk = prc->cblks.enc;
 829
 830         for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 831             opj_tcd_layer_t *layer = &cblk->layers[layno];
 832
 833             if (!cblk->numpasses && layer->numpasses) {
 834                 opj_tgt_setvalue(prc->incltree, cblkno, (OPJ_INT32)layno);
 835             }
 836
 837             ++cblk;
 838         }
 839
 840         cblk = prc->cblks.enc;
 841         for (cblkno = 0; cblkno < l_nb_blocks; cblkno++) {
 842             opj_tcd_layer_t *layer = &cblk->layers[layno];
 843             OPJ_UINT32 increment = 0;
 844             OPJ_UINT32 nump = 0;
 845             OPJ_UINT32 len = 0, passno;
 846             OPJ_UINT32 l_nb_passes;
 847
 848             /* cblk inclusion bits */
 849             if (!cblk->numpasses) {
 850                 opj_tgt_encode(bio, prc->incltree, cblkno, (OPJ_INT32)(layno + 1));
 851             } else {
 852                 opj_bio_putbit(bio, layer->numpasses != 0);
 853             }
 854
 855             /* if cblk not included, go to the next cblk  */
 856             if (!layer->numpasses) {
 857                 ++cblk;
 858                 continue;
 859             }
 860
 861             /* if first instance of cblk --> zero bit-planes information */
 862             if (!cblk->numpasses) {
 863                 cblk->numlenbits = 3;
 864                 opj_tgt_encode(bio, prc->imsbtree, cblkno, 999);
 865             }
 866
 867             /* number of coding passes included */
 868             opj_t2_putnumpasses(bio, layer->numpasses);
 869             l_nb_passes = cblk->numpasses + layer->numpasses;
 870             pass = cblk->passes +  cblk->numpasses;
 871
 872             /* computation of the increase of the length indicator and insertion in the header     */
 873             for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 874                 ++nump;
 875                 len += pass->len;
 876
 877                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 878                     increment = (OPJ_UINT32)opj_int_max((OPJ_INT32)increment,
 879                                                         opj_int_floorlog2((OPJ_INT32)len) + 1
 880                                                         - ((OPJ_INT32)cblk->numlenbits + opj_int_floorlog2((OPJ_INT32)nump)));
 881                     len = 0;
 882                     nump = 0;
 883                 }
 884
 885                 ++pass;
 886             }
 887             opj_t2_putcommacode(bio, (OPJ_INT32)increment);
 888
 889             /* computation of the new Length indicator */
 890             cblk->numlenbits += increment;
 891
 892             pass = cblk->passes +  cblk->numpasses;
 893             /* insertion of the codeword segment length */
 894             for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 895                 nump++;
 896                 len += pass->len;
 897
 898                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 899                     opj_bio_write(bio, (OPJ_UINT32)len,
 900                                   cblk->numlenbits + (OPJ_UINT32)opj_int_floorlog2((OPJ_INT32)nump));
 901                     len = 0;
 902                     nump = 0;
 903                 }
 904                 ++pass;
 905             }
 906
 907             ++cblk;
 908         }
 909     }
 910
 911     if (!opj_bio_flush(bio)) {
 912         opj_bio_destroy(bio);
 913         return OPJ_FALSE;               /* modified to eliminate longjmp !! */
 914     }
 915
 916     l_nb_bytes = (OPJ_UINT32)opj_bio_numbytes(bio);
 917     c += l_nb_bytes;
 918     length -= l_nb_bytes;
 919
 920     opj_bio_destroy(bio);
 921
 922     /* <EPH 0xff92> */
 923     if (tcp->csty & J2K_CP_CSTY_EPH) {
 924         if (length < 2) {
 925             if (p_t2_mode == FINAL_PASS) {
 926                 opj_event_msg(p_manager, EVT_ERROR,
 927                               "opj_t2_encode_packet(): only %u bytes remaining in "
 928                               "output buffer. %u needed.\n",
 929                               length, 2);
 930             }
 931             return OPJ_FALSE;
 932         }
 933         c[0] = 255;
 934         c[1] = 146;
 935         c += 2;
 936         length -= 2;
 937     }
 938     /* </EPH> */
 939
 940     /* << INDEX */
 941     /* End of packet header position. Currently only represents the distance to start of packet
 942        Will be updated later by incrementing with packet start value*/
 943     if (cstr_info && cstr_info->index_write) {
 944         opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 945         info_PK->end_ph_pos = (OPJ_INT32)(c - dest);
 946     }
 947     /* INDEX >> */
 948
 949     /* Writing the packet body */
 950     band = res->bands;
 951     for (bandno = 0; !packet_empty && bandno < res->numbands; bandno++, ++band) {
 952         opj_tcd_precinct_t *prc;
 953
 954         /* Skip empty bands */
 955         if (opj_tcd_is_band_empty(band)) {
 956             continue;
 957         }
 958
 959         prc = &band->precincts[precno];
 960         l_nb_blocks = prc->cw * prc->ch;
 961         cblk = prc->cblks.enc;
 962
 963         for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 964             opj_tcd_layer_t *layer = &cblk->layers[layno];
 965
 966             if (!layer->numpasses) {
 967                 ++cblk;
 968                 continue;
 969             }
 970
 971             if (layer->len > length) {
 972                 if (p_t2_mode == FINAL_PASS) {
 973                     opj_event_msg(p_manager, EVT_ERROR,
 974                                   "opj_t2_encode_packet(): only %u bytes remaining in "
 975                                   "output buffer. %u needed.\n",
 976                                   length, layer->len);
 977                 }
 978                 return OPJ_FALSE;
 979             }
 980
 981             if (p_t2_mode == FINAL_PASS) {
 982                 memcpy(c, layer->data, layer->len);
 983             }
 984             cblk->numpasses += layer->numpasses;
 985             c += layer->len;
 986             length -= layer->len;
 987
 988             /* << INDEX */
 989             if (cstr_info && cstr_info->index_write) {
 990                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 991                 info_PK->disto += layer->disto;
 992                 if (cstr_info->D_max < info_PK->disto) {
 993                     cstr_info->D_max = info_PK->disto;
 994                 }
 995             }
 996
 997             ++cblk;
 998             /* INDEX >> */
 999         }
1000     }
1001
1002     assert(c >= dest);
1003     * p_data_written += (OPJ_UINT32)(c - dest);
1004
1005     return OPJ_TRUE;
1006 }
1007
1008 static OPJ_BOOL opj_t2_skip_packet(opj_t2_t* p_t2,
1009                                    opj_tcd_tile_t *p_tile,
1010                                    opj_tcp_t *p_tcp,
1011                                    opj_pi_iterator_t *p_pi,
1012                                    OPJ_BYTE *p_src,
1013                                    OPJ_UINT32 * p_data_read,
1014                                    OPJ_UINT32 p_max_length,
1015                                    opj_packet_info_t *p_pack_info,
1016                                    opj_event_mgr_t *p_manager)
1017 {
1018     OPJ_BOOL l_read_data;
1019     OPJ_UINT32 l_nb_bytes_read = 0;
1020     OPJ_UINT32 l_nb_total_bytes_read = 0;
1021
1022     *p_data_read = 0;
1023
1024     if (! opj_t2_read_packet_header(p_t2, p_tile, p_tcp, p_pi, &l_read_data, p_src,
1025                                     &l_nb_bytes_read, p_max_length, p_pack_info, p_manager)) {
1026         return OPJ_FALSE;
1027     }
1028
1029     p_src += l_nb_bytes_read;
1030     l_nb_total_bytes_read += l_nb_bytes_read;
1031     p_max_length -= l_nb_bytes_read;
1032
1033     /* we should read data for the packet */
1034     if (l_read_data) {
1035         l_nb_bytes_read = 0;
1036
1037         if (! opj_t2_skip_packet_data(p_t2, p_tile, p_pi, &l_nb_bytes_read,
1038                                       p_max_length, p_pack_info, p_manager)) {
1039             return OPJ_FALSE;
1040         }
1041
1042         l_nb_total_bytes_read += l_nb_bytes_read;
1043     }
1044     *p_data_read = l_nb_total_bytes_read;
1045
1046     return OPJ_TRUE;
1047 }
1048
1049
1050 static OPJ_BOOL opj_t2_read_packet_header(opj_t2_t* p_t2,
1051         opj_tcd_tile_t *p_tile,
1052         opj_tcp_t *p_tcp,
1053         opj_pi_iterator_t *p_pi,
1054         OPJ_BOOL * p_is_data_present,
1055         OPJ_BYTE *p_src_data,
1056         OPJ_UINT32 * p_data_read,
1057         OPJ_UINT32 p_max_length,
1058         opj_packet_info_t *p_pack_info,
1059         opj_event_mgr_t *p_manager)
1060
1061 {
1062     /* loop */
1063     OPJ_UINT32 bandno, cblkno;
1064     OPJ_UINT32 l_nb_code_blocks;
1065     OPJ_UINT32 l_remaining_length;
1066     OPJ_UINT32 l_header_length;
1067     OPJ_UINT32 * l_modified_length_ptr = 00;
1068     OPJ_BYTE *l_current_data = p_src_data;
1069     opj_cp_t *l_cp = p_t2->cp;
1070     opj_bio_t *l_bio = 00;  /* BIO component */
1071     opj_tcd_band_t *l_band = 00;
1072     opj_tcd_cblk_dec_t* l_cblk = 00;
1073     opj_tcd_resolution_t* l_res =
1074         &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1075
1076     OPJ_BYTE *l_header_data = 00;
1077     OPJ_BYTE **l_header_data_start = 00;
1078
1079     OPJ_UINT32 l_present;
1080
1081     if (p_pi->layno == 0) {
1082         l_band = l_res->bands;
1083
1084         /* reset tagtrees */
1085         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1086             if (!opj_tcd_is_band_empty(l_band)) {
1087                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1088                 if (!(p_pi->precno < (l_band->precincts_data_size / sizeof(
1089                                           opj_tcd_precinct_t)))) {
1090                     opj_event_msg(p_manager, EVT_ERROR, "Invalid precinct\n");
1091                     return OPJ_FALSE;
1092                 }
1093
1094
1095                 opj_tgt_reset(l_prc->incltree);
1096                 opj_tgt_reset(l_prc->imsbtree);
1097                 l_cblk = l_prc->cblks.dec;
1098
1099                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1100                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1101                     l_cblk->numsegs = 0;
1102                     l_cblk->real_num_segs = 0;
1103                     ++l_cblk;
1104                 }
1105             }
1106
1107             ++l_band;
1108         }
1109     }
1110
1111     /* SOP markers */
1112
1113     if (p_tcp->csty & J2K_CP_CSTY_SOP) {
1114         if (p_max_length < 6) {
1115             opj_event_msg(p_manager, EVT_WARNING,
1116                           "Not enough space for expected SOP marker\n");
1117         } else if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
1118             opj_event_msg(p_manager, EVT_WARNING, "Expected SOP marker\n");
1119         } else {
1120             l_current_data += 6;
1121         }
1122
1123         /** TODO : check the Nsop value */
1124     }
1125
1126     /*
1127     When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
1128     This part deal with this characteristic
1129     step 1: Read packet header in the saved structure
1130     step 2: Return to codestream for decoding
1131     */
1132
1133     l_bio = opj_bio_create();
1134     if (! l_bio) {
1135         return OPJ_FALSE;
1136     }
1137
1138     if (l_cp->ppm == 1) { /* PPM */
1139         l_header_data_start = &l_cp->ppm_data;
1140         l_header_data = *l_header_data_start;
1141         l_modified_length_ptr = &(l_cp->ppm_len);
1142
1143     } else if (p_tcp->ppt == 1) { /* PPT */
1144         l_header_data_start = &(p_tcp->ppt_data);
1145         l_header_data = *l_header_data_start;
1146         l_modified_length_ptr = &(p_tcp->ppt_len);
1147     } else { /* Normal Case */
1148         l_header_data_start = &(l_current_data);
1149         l_header_data = *l_header_data_start;
1150         l_remaining_length = (OPJ_UINT32)(p_src_data + p_max_length - l_header_data);
1151         l_modified_length_ptr = &(l_remaining_length);
1152     }
1153
1154     opj_bio_init_dec(l_bio, l_header_data, *l_modified_length_ptr);
1155
1156     l_present = opj_bio_read(l_bio, 1);
1157     JAS_FPRINTF(stderr, "present=%d \n", l_present);
1158     if (!l_present) {
1159         /* TODO MSD: no test to control the output of this function*/
1160         opj_bio_inalign(l_bio);
1161         l_header_data += opj_bio_numbytes(l_bio);
1162         opj_bio_destroy(l_bio);
1163
1164         /* EPH markers */
1165         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1166             if ((*l_modified_length_ptr - (OPJ_UINT32)(l_header_data -
1167                     *l_header_data_start)) < 2U) {
1168                 opj_event_msg(p_manager, EVT_WARNING,
1169                               "Not enough space for expected EPH marker\n");
1170             } else if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1171                 opj_event_msg(p_manager, EVT_WARNING, "Expected EPH marker\n");
1172             } else {
1173                 l_header_data += 2;
1174             }
1175         }
1176
1177         l_header_length = (OPJ_UINT32)(l_header_data - *l_header_data_start);
1178         *l_modified_length_ptr -= l_header_length;
1179         *l_header_data_start += l_header_length;
1180
1181         /* << INDEX */
1182         /* End of packet header position. Currently only represents the distance to start of packet
1183            Will be updated later by incrementing with packet start value */
1184         if (p_pack_info) {
1185             p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1186         }
1187         /* INDEX >> */
1188
1189         * p_is_data_present = OPJ_FALSE;
1190         *p_data_read = (OPJ_UINT32)(l_current_data - p_src_data);
1191         return OPJ_TRUE;
1192     }
1193
1194     l_band = l_res->bands;
1195     for (bandno = 0; bandno < l_res->numbands; ++bandno, ++l_band) {
1196         opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
1197
1198         if (opj_tcd_is_band_empty(l_band)) {
1199             continue;
1200         }
1201
1202         l_nb_code_blocks = l_prc->cw * l_prc->ch;
1203         l_cblk = l_prc->cblks.dec;
1204         for (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++) {
1205             OPJ_UINT32 l_included, l_increment, l_segno;
1206             OPJ_INT32 n;
1207
1208             /* if cblk not yet included before --> inclusion tagtree */
1209             if (!l_cblk->numsegs) {
1210                 l_included = opj_tgt_decode(l_bio, l_prc->incltree, cblkno,
1211                                             (OPJ_INT32)(p_pi->layno + 1));
1212                 /* else one bit */
1213             } else {
1214                 l_included = opj_bio_read(l_bio, 1);
1215             }
1216
1217             /* if cblk not included */
1218             if (!l_included) {
1219                 l_cblk->numnewpasses = 0;
1220                 ++l_cblk;
1221                 JAS_FPRINTF(stderr, "included=%d \n", l_included);
1222                 continue;
1223             }
1224
1225             /* if cblk not yet included --> zero-bitplane tagtree */
1226             if (!l_cblk->numsegs) {
1227                 OPJ_UINT32 i = 0;
1228
1229                 while (!opj_tgt_decode(l_bio, l_prc->imsbtree, cblkno, (OPJ_INT32)i)) {
1230                     ++i;
1231                 }
1232
1233                 l_cblk->Mb = (OPJ_UINT32)l_band->numbps;
1234                 l_cblk->numbps = (OPJ_UINT32)l_band->numbps + 1 - i;
1235                 l_cblk->numlenbits = 3;
1236             }
1237
1238             /* number of coding passes */
1239             l_cblk->numnewpasses = opj_t2_getnumpasses(l_bio);
1240             l_increment = opj_t2_getcommacode(l_bio);
1241
1242             /* length indicator increment */
1243             l_cblk->numlenbits += l_increment;
1244             l_segno = 0;
1245
1246             if (!l_cblk->numsegs) {
1247                 if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1)) {
1248                     opj_bio_destroy(l_bio);
1249                     return OPJ_FALSE;
1250                 }
1251             } else {
1252                 l_segno = l_cblk->numsegs - 1;
1253                 if (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses) {
1254                     ++l_segno;
1255                     if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
1256                         opj_bio_destroy(l_bio);
1257                         return OPJ_FALSE;
1258                     }
1259                 }
1260             }
1261             n = (OPJ_INT32)l_cblk->numnewpasses;
1262
1263             if ((p_tcp->tccps[p_pi->compno].cblksty & J2K_CCP_CBLKSTY_HT) != 0)
1264                 do {
1265                     OPJ_UINT32 bit_number;
1266                     l_cblk->segs[l_segno].numnewpasses = l_segno == 0 ? 1 : (OPJ_UINT32)n;
1267                     bit_number = l_cblk->numlenbits + opj_uint_floorlog2(
1268                                      l_cblk->segs[l_segno].numnewpasses);
1269                     if (bit_number > 32) {
1270                         opj_event_msg(p_manager, EVT_ERROR,
1271                                       "Invalid bit number %d in opj_t2_read_packet_header()\n",
1272                                       bit_number);
1273                         opj_bio_destroy(l_bio);
1274                         return OPJ_FALSE;
1275                     }
1276                     l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, bit_number);
1277                     JAS_FPRINTF(stderr, "included=%d numnewpasses=%d increment=%d len=%d \n",
1278                                 l_included, l_cblk->segs[l_segno].numnewpasses, l_increment,
1279                                 l_cblk->segs[l_segno].newlen);
1280
1281                     n -= (OPJ_INT32)l_cblk->segs[l_segno].numnewpasses;
1282                     if (n > 0) {
1283                         ++l_segno;
1284
1285                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
1286                             opj_bio_destroy(l_bio);
1287                             return OPJ_FALSE;
1288                         }
1289                     }
1290                 } while (n > 0);
1291             else
1292                 do {
1293                     OPJ_UINT32 bit_number;
1294                     l_cblk->segs[l_segno].numnewpasses = (OPJ_UINT32)opj_int_min((OPJ_INT32)(
1295                             l_cblk->segs[l_segno].maxpasses - l_cblk->segs[l_segno].numpasses), n);
1296                     bit_number = l_cblk->numlenbits + opj_uint_floorlog2(
1297                                      l_cblk->segs[l_segno].numnewpasses);
1298                     if (bit_number > 32) {
1299                         opj_event_msg(p_manager, EVT_ERROR,
1300                                       "Invalid bit number %d in opj_t2_read_packet_header()\n",
1301                                       bit_number);
1302                         opj_bio_destroy(l_bio);
1303                         return OPJ_FALSE;
1304                     }
1305                     l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, bit_number);
1306                     JAS_FPRINTF(stderr, "included=%d numnewpasses=%d increment=%d len=%d \n",
1307                                 l_included, l_cblk->segs[l_segno].numnewpasses, l_increment,
1308                                 l_cblk->segs[l_segno].newlen);
1309
1310                     n -= (OPJ_INT32)l_cblk->segs[l_segno].numnewpasses;
1311                     if (n > 0) {
1312                         ++l_segno;
1313
1314                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
1315                             opj_bio_destroy(l_bio);
1316                             return OPJ_FALSE;
1317                         }
1318                     }
1319                 } while (n > 0);
1320
1321             ++l_cblk;
1322         }
1323     }
1324
1325     if (!opj_bio_inalign(l_bio)) {
1326         opj_bio_destroy(l_bio);
1327         return OPJ_FALSE;
1328     }
1329
1330     l_header_data += opj_bio_numbytes(l_bio);
1331     opj_bio_destroy(l_bio);
1332
1333     /* EPH markers */
1334     if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1335         if ((*l_modified_length_ptr - (OPJ_UINT32)(l_header_data -
1336                 *l_header_data_start)) < 2U) {
1337             opj_event_msg(p_manager, EVT_WARNING,
1338                           "Not enough space for expected EPH marker\n");
1339         } else if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1340             opj_event_msg(p_manager, EVT_WARNING, "Expected EPH marker\n");
1341         } else {
1342             l_header_data += 2;
1343         }
1344     }
1345
1346     l_header_length = (OPJ_UINT32)(l_header_data - *l_header_data_start);
1347     JAS_FPRINTF(stderr, "hdrlen=%d \n", l_header_length);
1348     JAS_FPRINTF(stderr, "packet body\n");
1349     *l_modified_length_ptr -= l_header_length;
1350     *l_header_data_start += l_header_length;
1351
1352     /* << INDEX */
1353     /* End of packet header position. Currently only represents the distance to start of packet
1354      Will be updated later by incrementing with packet start value */
1355     if (p_pack_info) {
1356         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1357     }
1358     /* INDEX >> */
1359
1360     *p_is_data_present = OPJ_TRUE;
1361     *p_data_read = (OPJ_UINT32)(l_current_data - p_src_data);
1362
1363     return OPJ_TRUE;
1364 }
1365
1366 static OPJ_BOOL opj_t2_read_packet_data(opj_t2_t* p_t2,
1367                                         opj_tcd_tile_t *p_tile,
1368                                         opj_pi_iterator_t *p_pi,
1369                                         OPJ_BYTE *p_src_data,
1370                                         OPJ_UINT32 * p_data_read,
1371                                         OPJ_UINT32 p_max_length,
1372                                         opj_packet_info_t *pack_info,
1373                                         opj_event_mgr_t* p_manager)
1374 {
1375     OPJ_UINT32 bandno, cblkno;
1376     OPJ_UINT32 l_nb_code_blocks;
1377     OPJ_BYTE *l_current_data = p_src_data;
1378     opj_tcd_band_t *l_band = 00;
1379     opj_tcd_cblk_dec_t* l_cblk = 00;
1380     opj_tcd_resolution_t* l_res =
1381         &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1382     OPJ_BOOL partial_buffer = OPJ_FALSE;
1383
1384     OPJ_ARG_NOT_USED(p_t2);
1385     OPJ_ARG_NOT_USED(pack_info);
1386
1387     l_band = l_res->bands;
1388     for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1389         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1390
1391         if ((l_band->x1 - l_band->x0 == 0) || (l_band->y1 - l_band->y0 == 0)) {
1392             ++l_band;
1393             continue;
1394         }
1395
1396         l_nb_code_blocks = l_prc->cw * l_prc->ch;
1397         l_cblk = l_prc->cblks.dec;
1398
1399         for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1400             opj_tcd_seg_t *l_seg = 00;
1401
1402             // if we have a partial data stream, set numchunks to zero
1403             // since we have no data to actually decode.
1404             if (partial_buffer) {
1405                 l_cblk->numchunks = 0;
1406             }
1407
1408             if (!l_cblk->numnewpasses) {
1409                 /* nothing to do */
1410                 ++l_cblk;
1411                 continue;
1412             }
1413
1414             if (!l_cblk->numsegs) {
1415                 l_seg = l_cblk->segs;
1416                 ++l_cblk->numsegs;
1417             } else {
1418                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1419
1420                 if (l_seg->numpasses == l_seg->maxpasses) {
1421                     ++l_seg;
1422                     ++l_cblk->numsegs;
1423                 }
1424             }
1425
1426             do {
1427                 /* Check possible overflow (on l_current_data only, assumes input args already checked) then size */
1428                 if ((((OPJ_SIZE_T)l_current_data + (OPJ_SIZE_T)l_seg->newlen) <
1429                         (OPJ_SIZE_T)l_current_data) ||
1430                         (l_current_data + l_seg->newlen > p_src_data + p_max_length) ||
1431                         (partial_buffer)) {
1432                     if (p_t2->cp->strict) {
1433                         opj_event_msg(p_manager, EVT_ERROR,
1434                                       "read: segment too long (%d) with max (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1435                                       l_seg->newlen, p_max_length, cblkno, p_pi->precno, bandno, p_pi->resno,
1436                                       p_pi->compno);
1437                         return OPJ_FALSE;
1438                     } else {
1439                         opj_event_msg(p_manager, EVT_WARNING,
1440                                       "read: segment too long (%d) with max (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1441                                       l_seg->newlen, p_max_length, cblkno, p_pi->precno, bandno, p_pi->resno,
1442                                       p_pi->compno);
1443                         // skip this codeblock since it is a partial read
1444                         partial_buffer = OPJ_TRUE;
1445                         l_cblk->numchunks = 0;
1446
1447                         l_seg->numpasses += l_seg->numnewpasses;
1448                         l_cblk->numnewpasses -= l_seg->numnewpasses;
1449                         if (l_cblk->numnewpasses > 0) {
1450                             ++l_seg;
1451                             ++l_cblk->numsegs;
1452                             break;
1453                         }
1454                         continue;
1455                     }
1456                 }
1457
1458 #ifdef USE_JPWL
1459                 /* we need here a j2k handle to verify if making a check to
1460                 the validity of cblocks parameters is selected from user (-W) */
1461
1462                 /* let's check that we are not exceeding */
1463                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1464                     opj_event_msg(p_manager, EVT_WARNING,
1465                                   "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1466                                   l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1467                     if (!JPWL_ASSUME) {
1468                         opj_event_msg(p_manager, EVT_ERROR, "JPWL: giving up\n");
1469                         return OPJ_FALSE;
1470                     }
1471                     l_seg->newlen = 8192 - l_cblk->len;
1472                     opj_event_msg(p_manager, EVT_WARNING, "      - truncating segment to %d\n",
1473                                   l_seg->newlen);
1474                     break;
1475                 };
1476
1477 #endif /* USE_JPWL */
1478
1479                 if (l_cblk->numchunks == l_cblk->numchunksalloc) {
1480                     OPJ_UINT32 l_numchunksalloc = l_cblk->numchunksalloc * 2 + 1;
1481                     opj_tcd_seg_data_chunk_t* l_chunks =
1482                         (opj_tcd_seg_data_chunk_t*)opj_realloc(l_cblk->chunks,
1483                                 l_numchunksalloc * sizeof(opj_tcd_seg_data_chunk_t));
1484                     if (l_chunks == NULL) {
1485                         opj_event_msg(p_manager, EVT_ERROR,
1486                                       "cannot allocate opj_tcd_seg_data_chunk_t* array");
1487                         return OPJ_FALSE;
1488                     }
1489                     l_cblk->chunks = l_chunks;
1490                     l_cblk->numchunksalloc = l_numchunksalloc;
1491                 }
1492
1493                 l_cblk->chunks[l_cblk->numchunks].data = l_current_data;
1494                 l_cblk->chunks[l_cblk->numchunks].len = l_seg->newlen;
1495                 l_cblk->numchunks ++;
1496
1497                 l_current_data += l_seg->newlen;
1498                 l_seg->len += l_seg->newlen;
1499                 l_seg->numpasses += l_seg->numnewpasses;
1500                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1501
1502                 l_seg->real_num_passes = l_seg->numpasses;
1503
1504                 if (l_cblk->numnewpasses > 0) {
1505                     ++l_seg;
1506                     ++l_cblk->numsegs;
1507                 }
1508             } while (l_cblk->numnewpasses > 0);
1509
1510             l_cblk->real_num_segs = l_cblk->numsegs;
1511             ++l_cblk;
1512         } /* next code_block */
1513
1514         ++l_band;
1515     }
1516
1517     // return the number of bytes read
1518     if (partial_buffer) {
1519         *(p_data_read) = p_max_length;
1520     } else {
1521         *(p_data_read) = (OPJ_UINT32)(l_current_data - p_src_data);
1522     }
1523
1524     return OPJ_TRUE;
1525 }
1526
1527 static OPJ_BOOL opj_t2_skip_packet_data(opj_t2_t* p_t2,
1528                                         opj_tcd_tile_t *p_tile,
1529                                         opj_pi_iterator_t *p_pi,
1530                                         OPJ_UINT32 * p_data_read,
1531                                         OPJ_UINT32 p_max_length,
1532                                         opj_packet_info_t *pack_info,
1533                                         opj_event_mgr_t *p_manager)
1534 {
1535     OPJ_UINT32 bandno, cblkno;
1536     OPJ_UINT32 l_nb_code_blocks;
1537     opj_tcd_band_t *l_band = 00;
1538     opj_tcd_cblk_dec_t* l_cblk = 00;
1539     opj_tcd_resolution_t* l_res =
1540         &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1541
1542     OPJ_ARG_NOT_USED(p_t2);
1543     OPJ_ARG_NOT_USED(pack_info);
1544
1545     *p_data_read = 0;
1546     l_band = l_res->bands;
1547
1548     for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1549         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1550
1551         if ((l_band->x1 - l_band->x0 == 0) || (l_band->y1 - l_band->y0 == 0)) {
1552             ++l_band;
1553             continue;
1554         }
1555
1556         l_nb_code_blocks = l_prc->cw * l_prc->ch;
1557         l_cblk = l_prc->cblks.dec;
1558
1559         for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1560             opj_tcd_seg_t *l_seg = 00;
1561
1562             if (!l_cblk->numnewpasses) {
1563                 /* nothing to do */
1564                 ++l_cblk;
1565                 continue;
1566             }
1567
1568             if (!l_cblk->numsegs) {
1569                 l_seg = l_cblk->segs;
1570                 ++l_cblk->numsegs;
1571             } else {
1572                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1573
1574                 if (l_seg->numpasses == l_seg->maxpasses) {
1575                     ++l_seg;
1576                     ++l_cblk->numsegs;
1577                 }
1578             }
1579
1580             do {
1581                 /* Check possible overflow then size */
1582                 if (((*p_data_read + l_seg->newlen) < (*p_data_read)) ||
1583                         ((*p_data_read + l_seg->newlen) > p_max_length)) {
1584                     if (p_t2->cp->strict) {
1585                         opj_event_msg(p_manager, EVT_ERROR,
1586                                       "skip: segment too long (%d) with max (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1587                                       l_seg->newlen, p_max_length, cblkno, p_pi->precno, bandno, p_pi->resno,
1588                                       p_pi->compno);
1589                         return OPJ_FALSE;
1590                     } else {
1591                         opj_event_msg(p_manager, EVT_WARNING,
1592                                       "skip: segment too long (%d) with max (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1593                                       l_seg->newlen, p_max_length, cblkno, p_pi->precno, bandno, p_pi->resno,
1594                                       p_pi->compno);
1595                     }
1596                 }
1597
1598 #ifdef USE_JPWL
1599                 /* we need here a j2k handle to verify if making a check to
1600                 the validity of cblocks parameters is selected from user (-W) */
1601
1602                 /* let's check that we are not exceeding */
1603                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1604                     opj_event_msg(p_manager, EVT_WARNING,
1605                                   "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1606                                   l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1607                     if (!JPWL_ASSUME) {
1608                         opj_event_msg(p_manager, EVT_ERROR, "JPWL: giving up\n");
1609                         return -999;
1610                     }
1611                     l_seg->newlen = 8192 - l_cblk->len;
1612                     opj_event_msg(p_manager, EVT_WARNING, "      - truncating segment to %d\n",
1613                                   l_seg->newlen);
1614                     break;
1615                 };
1616
1617 #endif /* USE_JPWL */
1618                 JAS_FPRINTF(stderr, "p_data_read (%d) newlen (%d) \n", *p_data_read,
1619                             l_seg->newlen);
1620                 *(p_data_read) += l_seg->newlen;
1621
1622                 l_seg->numpasses += l_seg->numnewpasses;
1623                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1624                 if (l_cblk->numnewpasses > 0) {
1625                     ++l_seg;
1626                     ++l_cblk->numsegs;
1627                 }
1628             } while (l_cblk->numnewpasses > 0);
1629
1630             ++l_cblk;
1631         }
1632
1633         ++l_band;
1634     }
1635
1636     return OPJ_TRUE;
1637 }
1638
1639
1640 static OPJ_BOOL opj_t2_init_seg(opj_tcd_cblk_dec_t* cblk,
1641                                 OPJ_UINT32 index,
1642                                 OPJ_UINT32 cblksty,
1643                                 OPJ_UINT32 first)
1644 {
1645     opj_tcd_seg_t* seg = 00;
1646     OPJ_UINT32 l_nb_segs = index + 1;
1647
1648     if (l_nb_segs > cblk->m_current_max_segs) {
1649         opj_tcd_seg_t* new_segs;
1650         OPJ_UINT32 l_m_current_max_segs = cblk->m_current_max_segs +
1651                                           OPJ_J2K_DEFAULT_NB_SEGS;
1652
1653         new_segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs,
1654                                                 l_m_current_max_segs * sizeof(opj_tcd_seg_t));
1655         if (! new_segs) {
1656             /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to initialize segment %d\n", l_nb_segs); */
1657             return OPJ_FALSE;
1658         }
1659         cblk->segs = new_segs;
1660         memset(new_segs + cblk->m_current_max_segs,
1661                0, OPJ_J2K_DEFAULT_NB_SEGS * sizeof(opj_tcd_seg_t));
1662         cblk->m_current_max_segs = l_m_current_max_segs;
1663     }
1664
1665     seg = &cblk->segs[index];
1666     opj_tcd_reinit_segment(seg);
1667
1668     if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1669         seg->maxpasses = 1;
1670     } else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1671         if (first) {
1672             seg->maxpasses = 10;
1673         } else {
1674             seg->maxpasses = (((seg - 1)->maxpasses == 1) ||
1675                               ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1676         }
1677     } else {
1678         /* See paragraph "B.10.6 Number of coding passes" of the standard.
1679          * Probably that 109 must be interpreted a (Mb-1)*3 + 1 with Mb=37,
1680          * Mb being the maximum number of bit-planes available for the
1681          * representation of coefficients in the sub-band */
1682         seg->maxpasses = 109;
1683     }
1684
1685     return OPJ_TRUE;
1686 }