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_write(bio, 1, 1);
 171     }
 172     opj_bio_write(bio, 0, 1);
 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_write(bio, 0, 1);
 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);
 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);
 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
 506             if (!skip_packet) {
 507                 l_nb_bytes_read = 0;
 508
 509                 first_pass_failed[l_current_pi->compno] = OPJ_FALSE;
 510
 511                 if (! opj_t2_decode_packet(p_t2, p_tile, l_tcp, l_current_pi, l_current_data,
 512                                            &l_nb_bytes_read, p_max_len, l_pack_info, p_manager)) {
 513                     opj_pi_destroy(l_pi, l_nb_pocs);
 514                     opj_free(first_pass_failed);
 515                     return OPJ_FALSE;
 516                 }
 517
 518                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 519                 l_img_comp->resno_decoded = opj_uint_max(l_current_pi->resno,
 520                                             l_img_comp->resno_decoded);
 521             } else {
 522                 l_nb_bytes_read = 0;
 523                 if (! opj_t2_skip_packet(p_t2, p_tile, l_tcp, l_current_pi, l_current_data,
 524                                          &l_nb_bytes_read, p_max_len, l_pack_info, p_manager)) {
 525                     opj_pi_destroy(l_pi, l_nb_pocs);
 526                     opj_free(first_pass_failed);
 527                     return OPJ_FALSE;
 528                 }
 529             }
 530
 531             if (first_pass_failed[l_current_pi->compno]) {
 532                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 533                 if (l_img_comp->resno_decoded == 0) {
 534                     l_img_comp->resno_decoded =
 535                         p_tile->comps[l_current_pi->compno].minimum_num_resolutions - 1;
 536                 }
 537             }
 538
 539             l_current_data += l_nb_bytes_read;
 540             p_max_len -= l_nb_bytes_read;
 541
 542             /* INDEX >> */
 543 #ifdef TODO_MSD
 544             if (p_cstr_info) {
 545                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 546                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 547                 tp_start_packno = 0;
 548                 if (!p_cstr_info->packno) {
 549                     info_PK->start_pos = info_TL->end_header + 1;
 550                 } else if (info_TL->packet[p_cstr_info->packno - 1].end_pos >=
 551                            (OPJ_INT32)
 552                            p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_pos) { /* New tile part */
 553                     info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno -
 554                                                      tp_start_packno; /* Number of packets in previous tile-part */
 555                     tp_start_packno = p_cstr_info->packno;
 556                     curtp++;
 557                     info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header + 1;
 558                 } else {
 559                     info_PK->start_pos = (l_cp->m_specific_param.m_enc.m_tp_on &&
 560                                           info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[p_cstr_info->packno -
 561                                                                       1].end_pos + 1;
 562                 }
 563                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 564                 info_PK->end_ph_pos += info_PK->start_pos -
 565                                        1;  /* End of packet header which now only represents the distance */
 566                 ++p_cstr_info->packno;
 567             }
 568 #endif
 569             /* << INDEX */
 570         }
 571         ++l_current_pi;
 572
 573         opj_free(first_pass_failed);
 574     }
 575     /* INDEX >> */
 576 #ifdef TODO_MSD
 577     if
 578     (p_cstr_info) {
 579         p_cstr_info->tile[p_tile_no].tp[curtp].tp_numpacks = p_cstr_info->packno -
 580                 tp_start_packno; /* Number of packets in last tile-part */
 581     }
 582 #endif
 583     /* << INDEX */
 584
 585     /* don't forget to release pi */
 586     opj_pi_destroy(l_pi, l_nb_pocs);
 587     *p_data_read = (OPJ_UINT32)(l_current_data - p_src);
 588     return OPJ_TRUE;
 589 }
 590
 591 /* ----------------------------------------------------------------------- */
 592
 593 /**
 594  * Creates a Tier 2 handle
 595  *
 596  * @param       p_image         Source or destination image
 597  * @param       p_cp            Image coding parameters.
 598  * @return              a new T2 handle if successful, NULL otherwise.
 599 */
 600 opj_t2_t* opj_t2_create(opj_image_t *p_image, opj_cp_t *p_cp)
 601 {
 602     /* create the t2 structure */
 603     opj_t2_t *l_t2 = (opj_t2_t*)opj_calloc(1, sizeof(opj_t2_t));
 604     if (!l_t2) {
 605         return NULL;
 606     }
 607
 608     l_t2->image = p_image;
 609     l_t2->cp = p_cp;
 610
 611     return l_t2;
 612 }
 613
 614 void opj_t2_destroy(opj_t2_t *t2)
 615 {
 616     if (t2) {
 617         opj_free(t2);
 618     }
 619 }
 620
 621 static OPJ_BOOL opj_t2_decode_packet(opj_t2_t* p_t2,
 622                                      opj_tcd_tile_t *p_tile,
 623                                      opj_tcp_t *p_tcp,
 624                                      opj_pi_iterator_t *p_pi,
 625                                      OPJ_BYTE *p_src,
 626                                      OPJ_UINT32 * p_data_read,
 627                                      OPJ_UINT32 p_max_length,
 628                                      opj_packet_info_t *p_pack_info,
 629                                      opj_event_mgr_t *p_manager)
 630 {
 631     OPJ_BOOL l_read_data;
 632     OPJ_UINT32 l_nb_bytes_read = 0;
 633     OPJ_UINT32 l_nb_total_bytes_read = 0;
 634
 635     *p_data_read = 0;
 636
 637     if (! opj_t2_read_packet_header(p_t2, p_tile, p_tcp, p_pi, &l_read_data, p_src,
 638                                     &l_nb_bytes_read, p_max_length, p_pack_info, p_manager)) {
 639         return OPJ_FALSE;
 640     }
 641
 642     p_src += l_nb_bytes_read;
 643     l_nb_total_bytes_read += l_nb_bytes_read;
 644     p_max_length -= l_nb_bytes_read;
 645
 646     /* we should read data for the packet */
 647     if (l_read_data) {
 648         l_nb_bytes_read = 0;
 649
 650         if (! opj_t2_read_packet_data(p_t2, p_tile, p_pi, p_src, &l_nb_bytes_read,
 651                                       p_max_length, p_pack_info, p_manager)) {
 652             return OPJ_FALSE;
 653         }
 654
 655         l_nb_total_bytes_read += l_nb_bytes_read;
 656     }
 657
 658     *p_data_read = l_nb_total_bytes_read;
 659
 660     return OPJ_TRUE;
 661 }
 662
 663 static OPJ_BOOL opj_t2_encode_packet(OPJ_UINT32 tileno,
 664                                      opj_tcd_tile_t * tile,
 665                                      opj_tcp_t * tcp,
 666                                      opj_pi_iterator_t *pi,
 667                                      OPJ_BYTE *dest,
 668                                      OPJ_UINT32 * p_data_written,
 669                                      OPJ_UINT32 length,
 670                                      opj_codestream_info_t *cstr_info,
 671                                      J2K_T2_MODE p_t2_mode,
 672                                      opj_event_mgr_t *p_manager)
 673 {
 674     OPJ_UINT32 bandno, cblkno;
 675     OPJ_BYTE* c = dest;
 676     OPJ_UINT32 l_nb_bytes;
 677     OPJ_UINT32 compno = pi->compno;     /* component value */
 678     OPJ_UINT32 resno  = pi->resno;      /* resolution level value */
 679     OPJ_UINT32 precno = pi->precno;     /* precinct value */
 680     OPJ_UINT32 layno  = pi->layno;      /* quality layer value */
 681     OPJ_UINT32 l_nb_blocks;
 682     opj_tcd_band_t *band = 00;
 683     opj_tcd_cblk_enc_t* cblk = 00;
 684     opj_tcd_pass_t *pass = 00;
 685
 686     opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 687     opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 688
 689     opj_bio_t *bio = 00;    /* BIO component */
 690 #ifdef ENABLE_EMPTY_PACKET_OPTIMIZATION
 691     OPJ_BOOL packet_empty = OPJ_TRUE;
 692 #else
 693     OPJ_BOOL packet_empty = OPJ_FALSE;
 694 #endif
 695
 696 #ifdef DEBUG_VERBOSE
 697     if (p_t2_mode == FINAL_PASS) {
 698         fprintf(stderr,
 699                 "encode packet compono=%d, resno=%d, precno=%d, layno=%d\n",
 700                 compno, resno, precno, layno);
 701     }
 702 #endif
 703
 704     /* <SOP 0xff91> */
 705     if (tcp->csty & J2K_CP_CSTY_SOP) {
 706         if (length < 6) {
 707             if (p_t2_mode == FINAL_PASS) {
 708                 opj_event_msg(p_manager, EVT_ERROR,
 709                               "opj_t2_encode_packet(): only %u bytes remaining in "
 710                               "output buffer. %u needed.\n",
 711                               length, 6);
 712             }
 713             return OPJ_FALSE;
 714         }
 715         c[0] = 255;
 716         c[1] = 145;
 717         c[2] = 0;
 718         c[3] = 4;
 719 #if 0
 720         c[4] = (tile->packno % 65536) / 256;
 721         c[5] = (tile->packno % 65536) % 256;
 722 #else
 723         c[4] = (tile->packno >> 8) & 0xff; /* packno is uint32_t */
 724         c[5] = tile->packno & 0xff;
 725 #endif
 726         c += 6;
 727         length -= 6;
 728     }
 729     /* </SOP> */
 730
 731     if (!layno) {
 732         band = res->bands;
 733
 734         for (bandno = 0; bandno < res->numbands; ++bandno, ++band) {
 735             opj_tcd_precinct_t *prc;
 736
 737             /* Skip empty bands */
 738             if (opj_tcd_is_band_empty(band)) {
 739                 continue;
 740             }
 741
 742             prc = &band->precincts[precno];
 743             opj_tgt_reset(prc->incltree);
 744             opj_tgt_reset(prc->imsbtree);
 745
 746             l_nb_blocks = prc->cw * prc->ch;
 747             for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 748                 cblk = &prc->cblks.enc[cblkno];
 749
 750                 cblk->numpasses = 0;
 751                 opj_tgt_setvalue(prc->imsbtree, cblkno, band->numbps - (OPJ_INT32)cblk->numbps);
 752             }
 753         }
 754     }
 755
 756     bio = opj_bio_create();
 757     if (!bio) {
 758         /* FIXME event manager error callback */
 759         return OPJ_FALSE;
 760     }
 761     opj_bio_init_enc(bio, c, length);
 762
 763 #ifdef ENABLE_EMPTY_PACKET_OPTIMIZATION
 764     /* WARNING: this code branch is disabled, since it has been reported that */
 765     /* such packets cause decoding issues with cinema J2K hardware */
 766     /* decoders: https://groups.google.com/forum/#!topic/openjpeg/M7M_fLX_Bco */
 767
 768     /* Check if the packet is empty */
 769     /* Note: we could also skip that step and always write a packet header */
 770     band = res->bands;
 771     for (bandno = 0; bandno < res->numbands; ++bandno, ++band) {
 772         opj_tcd_precinct_t *prc;
 773         /* Skip empty bands */
 774         if (opj_tcd_is_band_empty(band)) {
 775             continue;
 776         }
 777
 778         prc = &band->precincts[precno];
 779         l_nb_blocks = prc->cw * prc->ch;
 780         cblk = prc->cblks.enc;
 781         for (cblkno = 0; cblkno < l_nb_blocks; cblkno++, ++cblk) {
 782             opj_tcd_layer_t *layer = &cblk->layers[layno];
 783
 784             /* if cblk not included, go to the next cblk  */
 785             if (!layer->numpasses) {
 786                 continue;
 787             }
 788             packet_empty = OPJ_FALSE;
 789             break;
 790         }
 791         if (!packet_empty) {
 792             break;
 793         }
 794     }
 795 #endif
 796     opj_bio_write(bio, packet_empty ? 0 : 1, 1);           /* Empty header bit */
 797
 798     /* Writing Packet header */
 799     band = res->bands;
 800     for (bandno = 0; !packet_empty &&
 801             bandno < res->numbands; ++bandno, ++band)      {
 802         opj_tcd_precinct_t *prc;
 803
 804         /* Skip empty bands */
 805         if (opj_tcd_is_band_empty(band)) {
 806             continue;
 807         }
 808
 809         prc = &band->precincts[precno];
 810         l_nb_blocks = prc->cw * prc->ch;
 811         cblk = prc->cblks.enc;
 812
 813         for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 814             opj_tcd_layer_t *layer = &cblk->layers[layno];
 815
 816             if (!cblk->numpasses && layer->numpasses) {
 817                 opj_tgt_setvalue(prc->incltree, cblkno, (OPJ_INT32)layno);
 818             }
 819
 820             ++cblk;
 821         }
 822
 823         cblk = prc->cblks.enc;
 824         for (cblkno = 0; cblkno < l_nb_blocks; cblkno++) {
 825             opj_tcd_layer_t *layer = &cblk->layers[layno];
 826             OPJ_UINT32 increment = 0;
 827             OPJ_UINT32 nump = 0;
 828             OPJ_UINT32 len = 0, passno;
 829             OPJ_UINT32 l_nb_passes;
 830
 831             /* cblk inclusion bits */
 832             if (!cblk->numpasses) {
 833                 opj_tgt_encode(bio, prc->incltree, cblkno, (OPJ_INT32)(layno + 1));
 834             } else {
 835                 opj_bio_write(bio, layer->numpasses != 0, 1);
 836             }
 837
 838             /* if cblk not included, go to the next cblk  */
 839             if (!layer->numpasses) {
 840                 ++cblk;
 841                 continue;
 842             }
 843
 844             /* if first instance of cblk --> zero bit-planes information */
 845             if (!cblk->numpasses) {
 846                 cblk->numlenbits = 3;
 847                 opj_tgt_encode(bio, prc->imsbtree, cblkno, 999);
 848             }
 849
 850             /* number of coding passes included */
 851             opj_t2_putnumpasses(bio, layer->numpasses);
 852             l_nb_passes = cblk->numpasses + layer->numpasses;
 853             pass = cblk->passes +  cblk->numpasses;
 854
 855             /* computation of the increase of the length indicator and insertion in the header     */
 856             for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 857                 ++nump;
 858                 len += pass->len;
 859
 860                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 861                     increment = (OPJ_UINT32)opj_int_max((OPJ_INT32)increment,
 862                                                         opj_int_floorlog2((OPJ_INT32)len) + 1
 863                                                         - ((OPJ_INT32)cblk->numlenbits + opj_int_floorlog2((OPJ_INT32)nump)));
 864                     len = 0;
 865                     nump = 0;
 866                 }
 867
 868                 ++pass;
 869             }
 870             opj_t2_putcommacode(bio, (OPJ_INT32)increment);
 871
 872             /* computation of the new Length indicator */
 873             cblk->numlenbits += increment;
 874
 875             pass = cblk->passes +  cblk->numpasses;
 876             /* insertion of the codeword segment length */
 877             for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 878                 nump++;
 879                 len += pass->len;
 880
 881                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 882                     opj_bio_write(bio, (OPJ_UINT32)len,
 883                                   cblk->numlenbits + (OPJ_UINT32)opj_int_floorlog2((OPJ_INT32)nump));
 884                     len = 0;
 885                     nump = 0;
 886                 }
 887                 ++pass;
 888             }
 889
 890             ++cblk;
 891         }
 892     }
 893
 894     if (!opj_bio_flush(bio)) {
 895         opj_bio_destroy(bio);
 896         return OPJ_FALSE;               /* modified to eliminate longjmp !! */
 897     }
 898
 899     l_nb_bytes = (OPJ_UINT32)opj_bio_numbytes(bio);
 900     c += l_nb_bytes;
 901     length -= l_nb_bytes;
 902
 903     opj_bio_destroy(bio);
 904
 905     /* <EPH 0xff92> */
 906     if (tcp->csty & J2K_CP_CSTY_EPH) {
 907         if (length < 2) {
 908             if (p_t2_mode == FINAL_PASS) {
 909                 opj_event_msg(p_manager, EVT_ERROR,
 910                               "opj_t2_encode_packet(): only %u bytes remaining in "
 911                               "output buffer. %u needed.\n",
 912                               length, 2);
 913             }
 914             return OPJ_FALSE;
 915         }
 916         c[0] = 255;
 917         c[1] = 146;
 918         c += 2;
 919         length -= 2;
 920     }
 921     /* </EPH> */
 922
 923     /* << INDEX */
 924     /* End of packet header position. Currently only represents the distance to start of packet
 925        Will be updated later by incrementing with packet start value*/
 926     if (cstr_info && cstr_info->index_write) {
 927         opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 928         info_PK->end_ph_pos = (OPJ_INT32)(c - dest);
 929     }
 930     /* INDEX >> */
 931
 932     /* Writing the packet body */
 933     band = res->bands;
 934     for (bandno = 0; !packet_empty && bandno < res->numbands; bandno++, ++band) {
 935         opj_tcd_precinct_t *prc;
 936
 937         /* Skip empty bands */
 938         if (opj_tcd_is_band_empty(band)) {
 939             continue;
 940         }
 941
 942         prc = &band->precincts[precno];
 943         l_nb_blocks = prc->cw * prc->ch;
 944         cblk = prc->cblks.enc;
 945
 946         for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 947             opj_tcd_layer_t *layer = &cblk->layers[layno];
 948
 949             if (!layer->numpasses) {
 950                 ++cblk;
 951                 continue;
 952             }
 953
 954             if (layer->len > length) {
 955                 if (p_t2_mode == FINAL_PASS) {
 956                     opj_event_msg(p_manager, EVT_ERROR,
 957                                   "opj_t2_encode_packet(): only %u bytes remaining in "
 958                                   "output buffer. %u needed.\n",
 959                                   length, layer->len);
 960                 }
 961                 return OPJ_FALSE;
 962             }
 963
 964             memcpy(c, layer->data, layer->len);
 965             cblk->numpasses += layer->numpasses;
 966             c += layer->len;
 967             length -= layer->len;
 968
 969             /* << INDEX */
 970             if (cstr_info && cstr_info->index_write) {
 971                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 972                 info_PK->disto += layer->disto;
 973                 if (cstr_info->D_max < info_PK->disto) {
 974                     cstr_info->D_max = info_PK->disto;
 975                 }
 976             }
 977
 978             ++cblk;
 979             /* INDEX >> */
 980         }
 981     }
 982
 983     assert(c >= dest);
 984     * p_data_written += (OPJ_UINT32)(c - dest);
 985
 986     return OPJ_TRUE;
 987 }
 988
 989 static OPJ_BOOL opj_t2_skip_packet(opj_t2_t* p_t2,
 990                                    opj_tcd_tile_t *p_tile,
 991                                    opj_tcp_t *p_tcp,
 992                                    opj_pi_iterator_t *p_pi,
 993                                    OPJ_BYTE *p_src,
 994                                    OPJ_UINT32 * p_data_read,
 995                                    OPJ_UINT32 p_max_length,
 996                                    opj_packet_info_t *p_pack_info,
 997                                    opj_event_mgr_t *p_manager)
 998 {
 999     OPJ_BOOL l_read_data;
1000     OPJ_UINT32 l_nb_bytes_read = 0;
1001     OPJ_UINT32 l_nb_total_bytes_read = 0;
1002
1003     *p_data_read = 0;
1004
1005     if (! opj_t2_read_packet_header(p_t2, p_tile, p_tcp, p_pi, &l_read_data, p_src,
1006                                     &l_nb_bytes_read, p_max_length, p_pack_info, p_manager)) {
1007         return OPJ_FALSE;
1008     }
1009
1010     p_src += l_nb_bytes_read;
1011     l_nb_total_bytes_read += l_nb_bytes_read;
1012     p_max_length -= l_nb_bytes_read;
1013
1014     /* we should read data for the packet */
1015     if (l_read_data) {
1016         l_nb_bytes_read = 0;
1017
1018         if (! opj_t2_skip_packet_data(p_t2, p_tile, p_pi, &l_nb_bytes_read,
1019                                       p_max_length, p_pack_info, p_manager)) {
1020             return OPJ_FALSE;
1021         }
1022
1023         l_nb_total_bytes_read += l_nb_bytes_read;
1024     }
1025     *p_data_read = l_nb_total_bytes_read;
1026
1027     return OPJ_TRUE;
1028 }
1029
1030
1031 static OPJ_BOOL opj_t2_read_packet_header(opj_t2_t* p_t2,
1032         opj_tcd_tile_t *p_tile,
1033         opj_tcp_t *p_tcp,
1034         opj_pi_iterator_t *p_pi,
1035         OPJ_BOOL * p_is_data_present,
1036         OPJ_BYTE *p_src_data,
1037         OPJ_UINT32 * p_data_read,
1038         OPJ_UINT32 p_max_length,
1039         opj_packet_info_t *p_pack_info,
1040         opj_event_mgr_t *p_manager)
1041
1042 {
1043     /* loop */
1044     OPJ_UINT32 bandno, cblkno;
1045     OPJ_UINT32 l_nb_code_blocks;
1046     OPJ_UINT32 l_remaining_length;
1047     OPJ_UINT32 l_header_length;
1048     OPJ_UINT32 * l_modified_length_ptr = 00;
1049     OPJ_BYTE *l_current_data = p_src_data;
1050     opj_cp_t *l_cp = p_t2->cp;
1051     opj_bio_t *l_bio = 00;  /* BIO component */
1052     opj_tcd_band_t *l_band = 00;
1053     opj_tcd_cblk_dec_t* l_cblk = 00;
1054     opj_tcd_resolution_t* l_res =
1055         &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1056
1057     OPJ_BYTE *l_header_data = 00;
1058     OPJ_BYTE **l_header_data_start = 00;
1059
1060     OPJ_UINT32 l_present;
1061
1062     if (p_pi->layno == 0) {
1063         l_band = l_res->bands;
1064
1065         /* reset tagtrees */
1066         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1067             if (!opj_tcd_is_band_empty(l_band)) {
1068                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1069                 if (!(p_pi->precno < (l_band->precincts_data_size / sizeof(
1070                                           opj_tcd_precinct_t)))) {
1071                     opj_event_msg(p_manager, EVT_ERROR, "Invalid precinct\n");
1072                     return OPJ_FALSE;
1073                 }
1074
1075
1076                 opj_tgt_reset(l_prc->incltree);
1077                 opj_tgt_reset(l_prc->imsbtree);
1078                 l_cblk = l_prc->cblks.dec;
1079
1080                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1081                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1082                     l_cblk->numsegs = 0;
1083                     l_cblk->real_num_segs = 0;
1084                     ++l_cblk;
1085                 }
1086             }
1087
1088             ++l_band;
1089         }
1090     }
1091
1092     /* SOP markers */
1093
1094     if (p_tcp->csty & J2K_CP_CSTY_SOP) {
1095         if (p_max_length < 6) {
1096             opj_event_msg(p_manager, EVT_WARNING,
1097                           "Not enough space for expected SOP marker\n");
1098         } else if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
1099             opj_event_msg(p_manager, EVT_WARNING, "Expected SOP marker\n");
1100         } else {
1101             l_current_data += 6;
1102         }
1103
1104         /** TODO : check the Nsop value */
1105     }
1106
1107     /*
1108     When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
1109     This part deal with this caracteristic
1110     step 1: Read packet header in the saved structure
1111     step 2: Return to codestream for decoding
1112     */
1113
1114     l_bio = opj_bio_create();
1115     if (! l_bio) {
1116         return OPJ_FALSE;
1117     }
1118
1119     if (l_cp->ppm == 1) { /* PPM */
1120         l_header_data_start = &l_cp->ppm_data;
1121         l_header_data = *l_header_data_start;
1122         l_modified_length_ptr = &(l_cp->ppm_len);
1123
1124     } else if (p_tcp->ppt == 1) { /* PPT */
1125         l_header_data_start = &(p_tcp->ppt_data);
1126         l_header_data = *l_header_data_start;
1127         l_modified_length_ptr = &(p_tcp->ppt_len);
1128     } else { /* Normal Case */
1129         l_header_data_start = &(l_current_data);
1130         l_header_data = *l_header_data_start;
1131         l_remaining_length = (OPJ_UINT32)(p_src_data + p_max_length - l_header_data);
1132         l_modified_length_ptr = &(l_remaining_length);
1133     }
1134
1135     opj_bio_init_dec(l_bio, l_header_data, *l_modified_length_ptr);
1136
1137     l_present = opj_bio_read(l_bio, 1);
1138     JAS_FPRINTF(stderr, "present=%d \n", l_present);
1139     if (!l_present) {
1140         /* TODO MSD: no test to control the output of this function*/
1141         opj_bio_inalign(l_bio);
1142         l_header_data += opj_bio_numbytes(l_bio);
1143         opj_bio_destroy(l_bio);
1144
1145         /* EPH markers */
1146         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1147             if ((*l_modified_length_ptr - (OPJ_UINT32)(l_header_data -
1148                     *l_header_data_start)) < 2U) {
1149                 opj_event_msg(p_manager, EVT_WARNING,
1150                               "Not enough space for expected EPH marker\n");
1151             } else if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1152                 opj_event_msg(p_manager, EVT_WARNING, "Expected EPH marker\n");
1153             } else {
1154                 l_header_data += 2;
1155             }
1156         }
1157
1158         l_header_length = (OPJ_UINT32)(l_header_data - *l_header_data_start);
1159         *l_modified_length_ptr -= l_header_length;
1160         *l_header_data_start += l_header_length;
1161
1162         /* << INDEX */
1163         /* End of packet header position. Currently only represents the distance to start of packet
1164            Will be updated later by incrementing with packet start value */
1165         if (p_pack_info) {
1166             p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1167         }
1168         /* INDEX >> */
1169
1170         * p_is_data_present = OPJ_FALSE;
1171         *p_data_read = (OPJ_UINT32)(l_current_data - p_src_data);
1172         return OPJ_TRUE;
1173     }
1174
1175     l_band = l_res->bands;
1176     for (bandno = 0; bandno < l_res->numbands; ++bandno, ++l_band) {
1177         opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
1178
1179         if (opj_tcd_is_band_empty(l_band)) {
1180             continue;
1181         }
1182
1183         l_nb_code_blocks = l_prc->cw * l_prc->ch;
1184         l_cblk = l_prc->cblks.dec;
1185         for (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++) {
1186             OPJ_UINT32 l_included, l_increment, l_segno;
1187             OPJ_INT32 n;
1188
1189             /* if cblk not yet included before --> inclusion tagtree */
1190             if (!l_cblk->numsegs) {
1191                 l_included = opj_tgt_decode(l_bio, l_prc->incltree, cblkno,
1192                                             (OPJ_INT32)(p_pi->layno + 1));
1193                 /* else one bit */
1194             } else {
1195                 l_included = opj_bio_read(l_bio, 1);
1196             }
1197
1198             /* if cblk not included */
1199             if (!l_included) {
1200                 l_cblk->numnewpasses = 0;
1201                 ++l_cblk;
1202                 JAS_FPRINTF(stderr, "included=%d \n", l_included);
1203                 continue;
1204             }
1205
1206             /* if cblk not yet included --> zero-bitplane tagtree */
1207             if (!l_cblk->numsegs) {
1208                 OPJ_UINT32 i = 0;
1209
1210                 while (!opj_tgt_decode(l_bio, l_prc->imsbtree, cblkno, (OPJ_INT32)i)) {
1211                     ++i;
1212                 }
1213
1214                 l_cblk->numbps = (OPJ_UINT32)l_band->numbps + 1 - i;
1215                 l_cblk->numlenbits = 3;
1216             }
1217
1218             /* number of coding passes */
1219             l_cblk->numnewpasses = opj_t2_getnumpasses(l_bio);
1220             l_increment = opj_t2_getcommacode(l_bio);
1221
1222             /* length indicator increment */
1223             l_cblk->numlenbits += l_increment;
1224             l_segno = 0;
1225
1226             if (!l_cblk->numsegs) {
1227                 if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1)) {
1228                     opj_bio_destroy(l_bio);
1229                     return OPJ_FALSE;
1230                 }
1231             } else {
1232                 l_segno = l_cblk->numsegs - 1;
1233                 if (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses) {
1234                     ++l_segno;
1235                     if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
1236                         opj_bio_destroy(l_bio);
1237                         return OPJ_FALSE;
1238                     }
1239                 }
1240             }
1241             n = (OPJ_INT32)l_cblk->numnewpasses;
1242
1243             do {
1244                 OPJ_UINT32 bit_number;
1245                 l_cblk->segs[l_segno].numnewpasses = (OPJ_UINT32)opj_int_min((OPJ_INT32)(
1246                         l_cblk->segs[l_segno].maxpasses - l_cblk->segs[l_segno].numpasses), n);
1247                 bit_number = l_cblk->numlenbits + opj_uint_floorlog2(
1248                                  l_cblk->segs[l_segno].numnewpasses);
1249                 if (bit_number > 32) {
1250                     opj_event_msg(p_manager, EVT_ERROR,
1251                                   "Invalid bit number %d in opj_t2_read_packet_header()\n",
1252                                   bit_number);
1253                     opj_bio_destroy(l_bio);
1254                     return OPJ_FALSE;
1255                 }
1256                 l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, bit_number);
1257                 JAS_FPRINTF(stderr, "included=%d numnewpasses=%d increment=%d len=%d \n",
1258                             l_included, l_cblk->segs[l_segno].numnewpasses, l_increment,
1259                             l_cblk->segs[l_segno].newlen);
1260
1261                 n -= (OPJ_INT32)l_cblk->segs[l_segno].numnewpasses;
1262                 if (n > 0) {
1263                     ++l_segno;
1264
1265                     if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
1266                         opj_bio_destroy(l_bio);
1267                         return OPJ_FALSE;
1268                     }
1269                 }
1270             } while (n > 0);
1271
1272             ++l_cblk;
1273         }
1274     }
1275
1276     if (!opj_bio_inalign(l_bio)) {
1277         opj_bio_destroy(l_bio);
1278         return OPJ_FALSE;
1279     }
1280
1281     l_header_data += opj_bio_numbytes(l_bio);
1282     opj_bio_destroy(l_bio);
1283
1284     /* EPH markers */
1285     if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1286         if ((*l_modified_length_ptr - (OPJ_UINT32)(l_header_data -
1287                 *l_header_data_start)) < 2U) {
1288             opj_event_msg(p_manager, EVT_WARNING,
1289                           "Not enough space for expected EPH marker\n");
1290         } else if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1291             opj_event_msg(p_manager, EVT_WARNING, "Expected EPH marker\n");
1292         } else {
1293             l_header_data += 2;
1294         }
1295     }
1296
1297     l_header_length = (OPJ_UINT32)(l_header_data - *l_header_data_start);
1298     JAS_FPRINTF(stderr, "hdrlen=%d \n", l_header_length);
1299     JAS_FPRINTF(stderr, "packet body\n");
1300     *l_modified_length_ptr -= l_header_length;
1301     *l_header_data_start += l_header_length;
1302
1303     /* << INDEX */
1304     /* End of packet header position. Currently only represents the distance to start of packet
1305      Will be updated later by incrementing with packet start value */
1306     if (p_pack_info) {
1307         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1308     }
1309     /* INDEX >> */
1310
1311     *p_is_data_present = OPJ_TRUE;
1312     *p_data_read = (OPJ_UINT32)(l_current_data - p_src_data);
1313
1314     return OPJ_TRUE;
1315 }
1316
1317 static OPJ_BOOL opj_t2_read_packet_data(opj_t2_t* p_t2,
1318                                         opj_tcd_tile_t *p_tile,
1319                                         opj_pi_iterator_t *p_pi,
1320                                         OPJ_BYTE *p_src_data,
1321                                         OPJ_UINT32 * p_data_read,
1322                                         OPJ_UINT32 p_max_length,
1323                                         opj_packet_info_t *pack_info,
1324                                         opj_event_mgr_t* p_manager)
1325 {
1326     OPJ_UINT32 bandno, cblkno;
1327     OPJ_UINT32 l_nb_code_blocks;
1328     OPJ_BYTE *l_current_data = p_src_data;
1329     opj_tcd_band_t *l_band = 00;
1330     opj_tcd_cblk_dec_t* l_cblk = 00;
1331     opj_tcd_resolution_t* l_res =
1332         &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1333
1334     OPJ_ARG_NOT_USED(p_t2);
1335     OPJ_ARG_NOT_USED(pack_info);
1336
1337     l_band = l_res->bands;
1338     for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1339         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1340
1341         if ((l_band->x1 - l_band->x0 == 0) || (l_band->y1 - l_band->y0 == 0)) {
1342             ++l_band;
1343             continue;
1344         }
1345
1346         l_nb_code_blocks = l_prc->cw * l_prc->ch;
1347         l_cblk = l_prc->cblks.dec;
1348
1349         for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1350             opj_tcd_seg_t *l_seg = 00;
1351
1352             if (!l_cblk->numnewpasses) {
1353                 /* nothing to do */
1354                 ++l_cblk;
1355                 continue;
1356             }
1357
1358             if (!l_cblk->numsegs) {
1359                 l_seg = l_cblk->segs;
1360                 ++l_cblk->numsegs;
1361             } else {
1362                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1363
1364                 if (l_seg->numpasses == l_seg->maxpasses) {
1365                     ++l_seg;
1366                     ++l_cblk->numsegs;
1367                 }
1368             }
1369
1370             do {
1371                 /* Check possible overflow (on l_current_data only, assumes input args already checked) then size */
1372                 if ((((OPJ_SIZE_T)l_current_data + (OPJ_SIZE_T)l_seg->newlen) <
1373                         (OPJ_SIZE_T)l_current_data) ||
1374                         (l_current_data + l_seg->newlen > p_src_data + p_max_length)) {
1375                     opj_event_msg(p_manager, EVT_ERROR,
1376                                   "read: segment too long (%d) with max (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1377                                   l_seg->newlen, p_max_length, cblkno, p_pi->precno, bandno, p_pi->resno,
1378                                   p_pi->compno);
1379                     return OPJ_FALSE;
1380                 }
1381
1382 #ifdef USE_JPWL
1383                 /* we need here a j2k handle to verify if making a check to
1384                 the validity of cblocks parameters is selected from user (-W) */
1385
1386                 /* let's check that we are not exceeding */
1387                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1388                     opj_event_msg(p_manager, EVT_WARNING,
1389                                   "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1390                                   l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1391                     if (!JPWL_ASSUME) {
1392                         opj_event_msg(p_manager, EVT_ERROR, "JPWL: giving up\n");
1393                         return OPJ_FALSE;
1394                     }
1395                     l_seg->newlen = 8192 - l_cblk->len;
1396                     opj_event_msg(p_manager, EVT_WARNING, "      - truncating segment to %d\n",
1397                                   l_seg->newlen);
1398                     break;
1399                 };
1400
1401 #endif /* USE_JPWL */
1402
1403                 if (l_cblk->numchunks == l_cblk->numchunksalloc) {
1404                     OPJ_UINT32 l_numchunksalloc = l_cblk->numchunksalloc * 2 + 1;
1405                     opj_tcd_seg_data_chunk_t* l_chunks =
1406                         (opj_tcd_seg_data_chunk_t*)opj_realloc(l_cblk->chunks,
1407                                 l_numchunksalloc * sizeof(opj_tcd_seg_data_chunk_t));
1408                     if (l_chunks == NULL) {
1409                         opj_event_msg(p_manager, EVT_ERROR,
1410                                       "cannot allocate opj_tcd_seg_data_chunk_t* array");
1411                         return OPJ_FALSE;
1412                     }
1413                     l_cblk->chunks = l_chunks;
1414                     l_cblk->numchunksalloc = l_numchunksalloc;
1415                 }
1416
1417                 l_cblk->chunks[l_cblk->numchunks].data = l_current_data;
1418                 l_cblk->chunks[l_cblk->numchunks].len = l_seg->newlen;
1419                 l_cblk->numchunks ++;
1420
1421                 l_current_data += l_seg->newlen;
1422                 l_seg->len += l_seg->newlen;
1423                 l_seg->numpasses += l_seg->numnewpasses;
1424                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1425
1426                 l_seg->real_num_passes = l_seg->numpasses;
1427
1428                 if (l_cblk->numnewpasses > 0) {
1429                     ++l_seg;
1430                     ++l_cblk->numsegs;
1431                 }
1432             } while (l_cblk->numnewpasses > 0);
1433
1434             l_cblk->real_num_segs = l_cblk->numsegs;
1435             ++l_cblk;
1436         } /* next code_block */
1437
1438         ++l_band;
1439     }
1440
1441     *(p_data_read) = (OPJ_UINT32)(l_current_data - p_src_data);
1442
1443
1444     return OPJ_TRUE;
1445 }
1446
1447 static OPJ_BOOL opj_t2_skip_packet_data(opj_t2_t* p_t2,
1448                                         opj_tcd_tile_t *p_tile,
1449                                         opj_pi_iterator_t *p_pi,
1450                                         OPJ_UINT32 * p_data_read,
1451                                         OPJ_UINT32 p_max_length,
1452                                         opj_packet_info_t *pack_info,
1453                                         opj_event_mgr_t *p_manager)
1454 {
1455     OPJ_UINT32 bandno, cblkno;
1456     OPJ_UINT32 l_nb_code_blocks;
1457     opj_tcd_band_t *l_band = 00;
1458     opj_tcd_cblk_dec_t* l_cblk = 00;
1459     opj_tcd_resolution_t* l_res =
1460         &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1461
1462     OPJ_ARG_NOT_USED(p_t2);
1463     OPJ_ARG_NOT_USED(pack_info);
1464
1465     *p_data_read = 0;
1466     l_band = l_res->bands;
1467
1468     for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1469         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1470
1471         if ((l_band->x1 - l_band->x0 == 0) || (l_band->y1 - l_band->y0 == 0)) {
1472             ++l_band;
1473             continue;
1474         }
1475
1476         l_nb_code_blocks = l_prc->cw * l_prc->ch;
1477         l_cblk = l_prc->cblks.dec;
1478
1479         for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1480             opj_tcd_seg_t *l_seg = 00;
1481
1482             if (!l_cblk->numnewpasses) {
1483                 /* nothing to do */
1484                 ++l_cblk;
1485                 continue;
1486             }
1487
1488             if (!l_cblk->numsegs) {
1489                 l_seg = l_cblk->segs;
1490                 ++l_cblk->numsegs;
1491             } else {
1492                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1493
1494                 if (l_seg->numpasses == l_seg->maxpasses) {
1495                     ++l_seg;
1496                     ++l_cblk->numsegs;
1497                 }
1498             }
1499
1500             do {
1501                 /* Check possible overflow then size */
1502                 if (((*p_data_read + l_seg->newlen) < (*p_data_read)) ||
1503                         ((*p_data_read + l_seg->newlen) > p_max_length)) {
1504                     opj_event_msg(p_manager, EVT_ERROR,
1505                                   "skip: segment too long (%d) with max (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1506                                   l_seg->newlen, p_max_length, cblkno, p_pi->precno, bandno, p_pi->resno,
1507                                   p_pi->compno);
1508                     return OPJ_FALSE;
1509                 }
1510
1511 #ifdef USE_JPWL
1512                 /* we need here a j2k handle to verify if making a check to
1513                 the validity of cblocks parameters is selected from user (-W) */
1514
1515                 /* let's check that we are not exceeding */
1516                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1517                     opj_event_msg(p_manager, EVT_WARNING,
1518                                   "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1519                                   l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1520                     if (!JPWL_ASSUME) {
1521                         opj_event_msg(p_manager, EVT_ERROR, "JPWL: giving up\n");
1522                         return -999;
1523                     }
1524                     l_seg->newlen = 8192 - l_cblk->len;
1525                     opj_event_msg(p_manager, EVT_WARNING, "      - truncating segment to %d\n",
1526                                   l_seg->newlen);
1527                     break;
1528                 };
1529
1530 #endif /* USE_JPWL */
1531                 JAS_FPRINTF(stderr, "p_data_read (%d) newlen (%d) \n", *p_data_read,
1532                             l_seg->newlen);
1533                 *(p_data_read) += l_seg->newlen;
1534
1535                 l_seg->numpasses += l_seg->numnewpasses;
1536                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1537                 if (l_cblk->numnewpasses > 0) {
1538                     ++l_seg;
1539                     ++l_cblk->numsegs;
1540                 }
1541             } while (l_cblk->numnewpasses > 0);
1542
1543             ++l_cblk;
1544         }
1545
1546         ++l_band;
1547     }
1548
1549     return OPJ_TRUE;
1550 }
1551
1552
1553 static OPJ_BOOL opj_t2_init_seg(opj_tcd_cblk_dec_t* cblk,
1554                                 OPJ_UINT32 index,
1555                                 OPJ_UINT32 cblksty,
1556                                 OPJ_UINT32 first)
1557 {
1558     opj_tcd_seg_t* seg = 00;
1559     OPJ_UINT32 l_nb_segs = index + 1;
1560
1561     if (l_nb_segs > cblk->m_current_max_segs) {
1562         opj_tcd_seg_t* new_segs;
1563         OPJ_UINT32 l_m_current_max_segs = cblk->m_current_max_segs +
1564                                           OPJ_J2K_DEFAULT_NB_SEGS;
1565
1566         new_segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs,
1567                                                 l_m_current_max_segs * sizeof(opj_tcd_seg_t));
1568         if (! new_segs) {
1569             /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to initialize segment %d\n", l_nb_segs); */
1570             return OPJ_FALSE;
1571         }
1572         cblk->segs = new_segs;
1573         memset(new_segs + cblk->m_current_max_segs,
1574                0, OPJ_J2K_DEFAULT_NB_SEGS * sizeof(opj_tcd_seg_t));
1575         cblk->m_current_max_segs = l_m_current_max_segs;
1576     }
1577
1578     seg = &cblk->segs[index];
1579     opj_tcd_reinit_segment(seg);
1580
1581     if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1582         seg->maxpasses = 1;
1583     } else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1584         if (first) {
1585             seg->maxpasses = 10;
1586         } else {
1587             seg->maxpasses = (((seg - 1)->maxpasses == 1) ||
1588                               ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1589         }
1590     } else {
1591         /* See paragraph "B.10.6 Number of coding passes" of the standard.
1592          * Probably that 109 must be interpreted a (Mb-1)*3 + 1 with Mb=37,
1593          * Mb being the maximum number of bit-planes available for the
1594          * representation of coefficients in the sub-band */
1595         seg->maxpasses = 109;
1596     }
1597
1598     return OPJ_TRUE;
1599 }