src/lib/openjp2/t2.c

   1 /*
   2  * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
   3  * Copyright (c) 2002-2007, Professor Benoit Macq
   4  * Copyright (c) 2001-2003, David Janssens
   5  * Copyright (c) 2002-2003, Yannick Verschueren
   6  * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
   7  * Copyright (c) 2005, Herve Drolon, FreeImage Team
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "opj_includes.h"
  33
  34 /** @defgroup T2 T2 - Implementation of a tier-2 coding */
  35 /*@{*/
  36
  37 /** @name Local static functions */
  38 /*@{*/
  39
  40 static void t2_putcommacode(opj_bio_t *bio, int n);
  41
  42 static OPJ_UINT32 opj_t2_getcommacode(opj_bio_t *bio);
  43 /**
  44 Variable length code for signalling delta Zil (truncation point)
  45 @param bio  Bit Input/Output component
  46 @param n    delta Zil
  47 */
  48 static void opj_t2_putnumpasses(opj_bio_t *bio, OPJ_UINT32 n);
  49 static OPJ_UINT32 opj_t2_getnumpasses(opj_bio_t *bio);
  50
  51 /**
  52 Encode a packet of a tile to a destination buffer
  53 @param tileno Number of the tile encoded
  54 @param tile Tile for which to write the packets
  55 @param tcp Tile coding parameters
  56 @param pi Packet identity
  57 @param dest Destination buffer
  58 @param p_data_written   FIXME DOC
  59 @param len Length of the destination buffer
  60 @param cstr_info Codestream information structure
  61 @return
  62 */
  63 static opj_bool opj_t2_encode_packet(   OPJ_UINT32 tileno,
  64                                         opj_tcd_tile_t *tile,
  65                                         opj_tcp_t *tcp,
  66                                         opj_pi_iterator_t *pi,
  67                                         OPJ_BYTE *dest,
  68                                         OPJ_UINT32 * p_data_written,
  69                                         OPJ_UINT32 len,
  70                                         opj_codestream_info_t *cstr_info);
  71
  72 /**
  73 Decode a packet of a tile from a source buffer
  74 @param t2 T2 handle
  75 @param tile Tile for which to write the packets
  76 @param tcp Tile coding parameters
  77 @param pi Packet identity
  78 @param src Source buffer
  79 @param data_read   FIXME DOC
  80 @param max_length  FIXME DOC
  81 @param pack_info Packet information
  82
  83 @return  FIXME DOC
  84 */
  85 static opj_bool opj_t2_decode_packet(   opj_t2_t* t2,
  86                                         opj_tcd_tile_t *tile,
  87                                         opj_tcp_t *tcp,
  88                                         opj_pi_iterator_t *pi,
  89                                         OPJ_BYTE *src,
  90                                         OPJ_UINT32 * data_read,
  91                                         OPJ_UINT32 max_length,
  92                                         opj_packet_info_t *pack_info);
  93
  94 static opj_bool opj_t2_skip_packet( opj_t2_t* p_t2,
  95                                     opj_tcd_tile_t *p_tile,
  96                                     opj_tcp_t *p_tcp,
  97                                     opj_pi_iterator_t *p_pi,
  98                                     OPJ_BYTE *p_src,
  99                                     OPJ_UINT32 * p_data_read,
 100                                     OPJ_UINT32 p_max_length,
 101                                     opj_packet_info_t *p_pack_info);
 102
 103 static opj_bool opj_t2_read_packet_header(  opj_t2_t* p_t2,
 104                                             opj_tcd_tile_t *p_tile,
 105                                             opj_tcp_t *p_tcp,
 106                                             opj_pi_iterator_t *p_pi,
 107                                             opj_bool * p_is_data_present,
 108                                             OPJ_BYTE *p_src_data,
 109                                             OPJ_UINT32 * p_data_read,
 110                                             OPJ_UINT32 p_max_length,
 111                                             opj_packet_info_t *p_pack_info);
 112
 113 static opj_bool opj_t2_read_packet_data(opj_t2_t* p_t2,
 114                                         opj_tcd_tile_t *p_tile,
 115                                         opj_pi_iterator_t *p_pi,
 116                                         OPJ_BYTE *p_src_data,
 117                                         OPJ_UINT32 * p_data_read,
 118                                         OPJ_UINT32 p_max_length,
 119                                         opj_packet_info_t *pack_info);
 120
 121 static opj_bool opj_t2_skip_packet_data(opj_t2_t* p_t2,
 122                                         opj_tcd_tile_t *p_tile,
 123                                         opj_pi_iterator_t *p_pi,
 124                                         OPJ_UINT32 * p_data_read,
 125                                         OPJ_UINT32 p_max_length,
 126                                         opj_packet_info_t *pack_info);
 127
 128 /**
 129 @param cblk
 130 @param index
 131 @param cblksty
 132 @param first
 133 */
 134 static opj_bool opj_t2_init_seg(    opj_tcd_cblk_dec_t* cblk,
 135                                     OPJ_UINT32 index,
 136                                     OPJ_UINT32 cblksty,
 137                                     OPJ_UINT32 first);
 138
 139 /*@}*/
 140
 141 /*@}*/
 142
 143 /* ----------------------------------------------------------------------- */
 144
 145 /* #define RESTART 0x04 */
 146 /* TODO MSD->LHE */
 147 static void t2_putcommacode(opj_bio_t *bio, int n) {
 148         while (--n >= 0) {
 149                 opj_bio_write(bio, 1, 1);
 150         }
 151         opj_bio_write(bio, 0, 1);
 152 }
 153
 154 OPJ_UINT32 opj_t2_getcommacode(opj_bio_t *bio)
 155 {
 156     OPJ_UINT32 n = 0;
 157     while (opj_bio_read(bio, 1)) {
 158             ++n;
 159     }
 160     return n;
 161 }
 162
 163 void opj_t2_putnumpasses(opj_bio_t *bio, OPJ_UINT32 n) {
 164         if (n == 1) {
 165                 opj_bio_write(bio, 0, 1);
 166         } else if (n == 2) {
 167                 opj_bio_write(bio, 2, 2);
 168         } else if (n <= 5) {
 169                 opj_bio_write(bio, 0xc | (n - 3), 4);
 170         } else if (n <= 36) {
 171                 opj_bio_write(bio, 0x1e0 | (n - 6), 9);
 172         } else if (n <= 164) {
 173                 opj_bio_write(bio, 0xff80 | (n - 37), 16);
 174         }
 175 }
 176
 177 OPJ_UINT32 opj_t2_getnumpasses(opj_bio_t *bio) {
 178         OPJ_UINT32 n;
 179         if (!opj_bio_read(bio, 1))
 180                 return 1;
 181         if (!opj_bio_read(bio, 1))
 182                 return 2;
 183         if ((n = opj_bio_read(bio, 2)) != 3)
 184                 return (3 + n);
 185         if ((n = opj_bio_read(bio, 5)) != 31)
 186                 return (6 + n);
 187         return (37 + opj_bio_read(bio, 7));
 188 }
 189
 190 /* ----------------------------------------------------------------------- */
 191
 192 opj_bool opj_t2_encode_packets( opj_t2_t* p_t2,
 193                                 OPJ_UINT32 p_tile_no,
 194                                 opj_tcd_tile_t *p_tile,
 195                                 OPJ_UINT32 p_maxlayers,
 196                                 OPJ_BYTE *p_dest,
 197                                 OPJ_UINT32 * p_data_written,
 198                                 OPJ_UINT32 p_max_len,
 199                                 opj_codestream_info_t *cstr_info,
 200                                 OPJ_UINT32 p_tp_num,
 201                                 OPJ_INT32 p_tp_pos,
 202                                 OPJ_UINT32 p_pino,
 203                                 J2K_T2_MODE p_t2_mode)
 204 {
 205         OPJ_BYTE *l_current_data = p_dest;
 206         OPJ_UINT32 l_nb_bytes = 0;
 207         OPJ_UINT32 compno;
 208         OPJ_UINT32 poc;
 209         opj_pi_iterator_t *l_pi = 00;
 210         opj_pi_iterator_t *l_current_pi = 00;
 211         opj_image_t *l_image = p_t2->image;
 212         opj_cp_t *l_cp = p_t2->cp;
 213         opj_tcp_t *l_tcp = &l_cp->tcps[p_tile_no];
 214         OPJ_UINT32 pocno = l_cp->m_specific_param.m_enc.m_cinema == CINEMA4K_24? 2: 1;
 215         OPJ_UINT32 l_max_comp = l_cp->m_specific_param.m_enc.m_max_comp_size > 0 ? l_image->numcomps : 1;
 216         OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 217
 218         l_pi = opj_pi_initialise_encode(l_image, l_cp, p_tile_no, p_t2_mode);
 219         if (!l_pi) {
 220                 return OPJ_FALSE;
 221         }
 222
 223         * p_data_written = 0;
 224
 225         if (p_t2_mode == THRESH_CALC ){ /* Calculating threshold */
 226                 l_current_pi = l_pi;
 227
 228                 for     (compno = 0; compno < l_max_comp; ++compno) {
 229                         OPJ_UINT32 l_comp_len = 0;
 230                         l_current_pi = l_pi;
 231
 232                         for (poc = 0; poc < pocno ; ++poc) {
 233                                 OPJ_UINT32 l_tp_num = compno;
 234
 235                                 /* TODO MSD : check why this function cannot fail (cf. v1) */
 236                                 opj_pi_create_encode(l_pi, l_cp,p_tile_no,poc,l_tp_num,p_tp_pos,p_t2_mode);
 237
 238                                 while (opj_pi_next(l_current_pi)) {
 239                                         if (l_current_pi->layno < p_maxlayers) {
 240                                                 l_nb_bytes = 0;
 241
 242                                                 if (! opj_t2_encode_packet(p_tile_no,p_tile, l_tcp, l_current_pi, l_current_data, &l_nb_bytes, p_max_len, cstr_info)) {
 243                                                         opj_pi_destroy(l_pi, l_nb_pocs);
 244                                                         return OPJ_FALSE;
 245                                                 }
 246
 247                                                 l_comp_len += l_nb_bytes;
 248                                                 l_current_data += l_nb_bytes;
 249                                                 p_max_len -= l_nb_bytes;
 250
 251                                                 * p_data_written += l_nb_bytes;
 252                                         }
 253                                 }
 254
 255                                 if (l_cp->m_specific_param.m_enc.m_max_comp_size) {
 256                                         if (l_comp_len > l_cp->m_specific_param.m_enc.m_max_comp_size) {
 257                                                 opj_pi_destroy(l_pi, l_nb_pocs);
 258                                                 return OPJ_FALSE;
 259                                         }
 260                                 }
 261
 262                                 ++l_current_pi;
 263                         }
 264                 }
 265         }
 266         else {  /* t2_mode == FINAL_PASS  */
 267                 opj_pi_create_encode(l_pi, l_cp,p_tile_no,p_pino,p_tp_num,p_tp_pos,p_t2_mode);
 268
 269                 l_current_pi = &l_pi[p_pino];
 270
 271                 while (opj_pi_next(l_current_pi)) {
 272                         if (l_current_pi->layno < p_maxlayers) {
 273                                 l_nb_bytes=0;
 274
 275                                 if (! opj_t2_encode_packet(p_tile_no,p_tile, l_tcp, l_current_pi, l_current_data, &l_nb_bytes, p_max_len, cstr_info)) {
 276                                         opj_pi_destroy(l_pi, l_nb_pocs);
 277                                         return OPJ_FALSE;
 278                                 }
 279
 280                                 l_current_data += l_nb_bytes;
 281                                 p_max_len -= l_nb_bytes;
 282
 283                                 * p_data_written += l_nb_bytes;
 284
 285                                 /* INDEX >> */
 286                                 if(cstr_info) {
 287                                         if(cstr_info->index_write) {
 288                                                 opj_tile_info_t *info_TL = &cstr_info->tile[p_tile_no];
 289                                                 opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno];
 290                                                 if (!cstr_info->packno) {
 291                                                         info_PK->start_pos = info_TL->end_header + 1;
 292                                                 } else {
 293                                                         info_PK->start_pos = ((l_cp->m_specific_param.m_enc.m_tp_on | l_tcp->POC)&& info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[cstr_info->packno - 1].end_pos + 1;
 294                                                 }
 295                                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes - 1;
 296                                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance
 297                                                                                                                                                                                                                                                    to start of packet is incremented by value of start of packet*/
 298                                         }
 299
 300                                         cstr_info->packno++;
 301                                 }
 302                                 /* << INDEX */
 303                                 ++p_tile->packno;
 304                         }
 305                 }
 306         }
 307
 308         opj_pi_destroy(l_pi, l_nb_pocs);
 309
 310         return OPJ_TRUE;
 311 }
 312
 313 opj_bool opj_t2_decode_packets( opj_t2_t *p_t2,
 314                                 OPJ_UINT32 p_tile_no,
 315                                 opj_tcd_tile_t *p_tile,
 316                                 OPJ_BYTE *p_src,
 317                                 OPJ_UINT32 * p_data_read,
 318                                 OPJ_UINT32 p_max_len,
 319                                 opj_codestream_index_t *p_cstr_index)
 320 {
 321         OPJ_BYTE *l_current_data = p_src;
 322         opj_pi_iterator_t *l_pi = 00;
 323         OPJ_UINT32 pino;
 324         opj_image_t *l_image = p_t2->image;
 325         opj_cp_t *l_cp = p_t2->cp;
 326         opj_tcp_t *l_tcp = &(p_t2->cp->tcps[p_tile_no]);
 327         OPJ_UINT32 l_nb_bytes_read;
 328         OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 329         opj_pi_iterator_t *l_current_pi = 00;
 330 #ifdef TODO_MSD
 331         OPJ_UINT32 curtp = 0;
 332 #endif
 333         OPJ_UINT32 tp_start_packno;
 334         opj_packet_info_t *l_pack_info = 00;
 335         opj_image_comp_t* l_img_comp = 00;
 336
 337         OPJ_ARG_NOT_USED(p_cstr_index);
 338
 339 #ifdef TODO_MSD
 340         if (p_cstr_index) {
 341                 l_pack_info = p_cstr_index->tile_index[p_tile_no].packet;
 342         }
 343 #endif
 344
 345         /* create a packet iterator */
 346         l_pi = opj_pi_create_decode(l_image, l_cp, p_tile_no);
 347         if (!l_pi) {
 348                 return OPJ_FALSE;
 349         }
 350
 351         tp_start_packno = 0;
 352         l_current_pi = l_pi;
 353
 354         for     (pino = 0; pino <= l_tcp->numpocs; ++pino) {
 355
 356                 /* if the resolution needed is to low, one dim of the tilec could be equal to zero
 357                  * and no packets are used to encode this resolution and
 358                  * l_current_pi->resno is always >= p_tile->comps[l_current_pi->compno].minimum_num_resolutions
 359                  * and no l_img_comp->resno_decoded are computed
 360                  */
 361                 opj_bool* first_pass_failed = (opj_bool*)opj_malloc(l_image->numcomps * sizeof(opj_bool));
 362                 if (!first_pass_failed)
 363                 {
 364                     opj_pi_destroy(l_pi,l_nb_pocs);
 365                     return OPJ_FALSE;
 366                 }
 367                 memset(first_pass_failed, OPJ_TRUE, l_image->numcomps * sizeof(opj_bool));
 368
 369                 while (opj_pi_next(l_current_pi)) {
 370
 371
 372                         if (l_tcp->num_layers_to_decode > l_current_pi->layno
 373                                         && l_current_pi->resno < p_tile->comps[l_current_pi->compno].minimum_num_resolutions) {
 374                                 l_nb_bytes_read = 0;
 375
 376                                 first_pass_failed[l_current_pi->compno] = OPJ_FALSE;
 377
 378                                 if (! opj_t2_decode_packet(p_t2,p_tile,l_tcp,l_current_pi,l_current_data,&l_nb_bytes_read,p_max_len,l_pack_info)) {
 379                                         opj_pi_destroy(l_pi,l_nb_pocs);
 380                                         opj_free(first_pass_failed);
 381                                         return OPJ_FALSE;
 382                                 }
 383
 384                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 385                                 l_img_comp->resno_decoded = opj_uint_max(l_current_pi->resno, l_img_comp->resno_decoded);
 386                         }
 387                         else {
 388                                 l_nb_bytes_read = 0;
 389                                 if (! opj_t2_skip_packet(p_t2,p_tile,l_tcp,l_current_pi,l_current_data,&l_nb_bytes_read,p_max_len,l_pack_info)) {
 390                                         opj_pi_destroy(l_pi,l_nb_pocs);
 391                                         opj_free(first_pass_failed);
 392                                         return OPJ_FALSE;
 393                                 }
 394                         }
 395
 396                         if (first_pass_failed[l_current_pi->compno]) {
 397                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 398                                 if (l_img_comp->resno_decoded == 0)
 399                                         l_img_comp->resno_decoded = p_tile->comps[l_current_pi->compno].minimum_num_resolutions - 1;
 400                         }
 401
 402                         l_current_data += l_nb_bytes_read;
 403                         p_max_len -= l_nb_bytes_read;
 404
 405                         /* INDEX >> */
 406 #ifdef TODO_MSD
 407                         if(p_cstr_info) {
 408                                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 409                                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 410                                 if (!p_cstr_info->packno) {
 411                                         info_PK->start_pos = info_TL->end_header + 1;
 412                                 } else if (info_TL->packet[p_cstr_info->packno-1].end_pos >= (OPJ_INT32)p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_pos){ /* New tile part */
 413                                         info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno - tp_start_packno; /* Number of packets in previous tile-part */
 414                                         tp_start_packno = p_cstr_info->packno;
 415                                         curtp++;
 416                                         info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header+1;
 417                                 } else {
 418                                         info_PK->start_pos = (l_cp->m_specific_param.m_enc.m_tp_on && info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[p_cstr_info->packno - 1].end_pos + 1;
 419                                 }
 420                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 421                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance */
 422                                 ++p_cstr_info->packno;
 423                         }
 424 #endif
 425                         /* << INDEX */
 426                 }
 427                 ++l_current_pi;
 428
 429                 opj_free(first_pass_failed);
 430         }
 431         /* INDEX >> */
 432 #ifdef TODO_MSD
 433         if
 434                 (p_cstr_info) {
 435                 p_cstr_info->tile[p_tile_no].tp[curtp].tp_numpacks = p_cstr_info->packno - tp_start_packno; /* Number of packets in last tile-part */
 436         }
 437 #endif
 438         /* << INDEX */
 439
 440         /* don't forget to release pi */
 441         opj_pi_destroy(l_pi,l_nb_pocs);
 442         *p_data_read = l_current_data - p_src;
 443         return OPJ_TRUE;
 444 }
 445
 446 /* ----------------------------------------------------------------------- */
 447
 448 /**
 449  * Creates a Tier 2 handle
 450  *
 451  * @param       p_image         Source or destination image
 452  * @param       p_cp            Image coding parameters.
 453  * @return              a new T2 handle if successful, NULL otherwise.
 454 */
 455 opj_t2_t* opj_t2_create(opj_image_t *p_image, opj_cp_t *p_cp)
 456 {
 457         /* create the t2 structure */
 458         opj_t2_t *l_t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
 459         if (!l_t2) {
 460                 return NULL;
 461         }
 462         memset(l_t2,0,sizeof(opj_t2_t));
 463
 464         l_t2->image = p_image;
 465         l_t2->cp = p_cp;
 466
 467         return l_t2;
 468 }
 469
 470 void opj_t2_destroy(opj_t2_t *t2) {
 471         if(t2) {
 472                 opj_free(t2);
 473         }
 474 }
 475
 476 opj_bool opj_t2_decode_packet(  opj_t2_t* p_t2,
 477                                 opj_tcd_tile_t *p_tile,
 478                                 opj_tcp_t *p_tcp,
 479                                 opj_pi_iterator_t *p_pi,
 480                                 OPJ_BYTE *p_src,
 481                                 OPJ_UINT32 * p_data_read,
 482                                 OPJ_UINT32 p_max_length,
 483                                 opj_packet_info_t *p_pack_info)
 484 {
 485         opj_bool l_read_data;
 486         OPJ_UINT32 l_nb_bytes_read = 0;
 487         OPJ_UINT32 l_nb_total_bytes_read = 0;
 488
 489         *p_data_read = 0;
 490
 491         if (! opj_t2_read_packet_header(p_t2,p_tile,p_tcp,p_pi,&l_read_data,p_src,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 492                 return OPJ_FALSE;
 493         }
 494
 495         p_src += l_nb_bytes_read;
 496         l_nb_total_bytes_read += l_nb_bytes_read;
 497         p_max_length -= l_nb_bytes_read;
 498
 499         /* we should read data for the packet */
 500         if (l_read_data) {
 501                 l_nb_bytes_read = 0;
 502
 503                 if (! opj_t2_read_packet_data(p_t2,p_tile,p_pi,p_src,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 504                         return OPJ_FALSE;
 505                 }
 506
 507                 l_nb_total_bytes_read += l_nb_bytes_read;
 508         }
 509
 510         *p_data_read = l_nb_total_bytes_read;
 511
 512         return OPJ_TRUE;
 513 }
 514
 515 opj_bool opj_t2_encode_packet(  OPJ_UINT32 tileno,
 516                                 opj_tcd_tile_t * tile,
 517                                 opj_tcp_t * tcp,
 518                                 opj_pi_iterator_t *pi,
 519                                 OPJ_BYTE *dest,
 520                                 OPJ_UINT32 * p_data_written,
 521                                 OPJ_UINT32 length,
 522                                 opj_codestream_info_t *cstr_info)
 523 {
 524         OPJ_UINT32 bandno, cblkno;
 525         OPJ_BYTE *c = dest;
 526         OPJ_UINT32 l_nb_bytes;
 527         OPJ_UINT32 compno = pi->compno; /* component value */
 528         OPJ_UINT32 resno  = pi->resno;          /* resolution level value */
 529         OPJ_UINT32 precno = pi->precno; /* precinct value */
 530         OPJ_UINT32 layno  = pi->layno;          /* quality layer value */
 531         OPJ_UINT32 l_nb_blocks;
 532         opj_tcd_band_t *band = 00;
 533         opj_tcd_cblk_enc_t* cblk = 00;
 534         opj_tcd_pass_t *pass = 00;
 535
 536         opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 537         opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 538
 539         opj_bio_t *bio = 00;    /* BIO component */
 540
 541         /* <SOP 0xff91> */
 542         if (tcp->csty & J2K_CP_CSTY_SOP) {
 543                 c[0] = 255;
 544                 c[1] = 145;
 545                 c[2] = 0;
 546                 c[3] = 4;
 547                 c[4] = (tile->packno % 65536) / 256;
 548                 c[5] = (tile->packno % 65536) % 256;
 549                 c += 6;
 550                 length -= 6;
 551         }
 552         /* </SOP> */
 553
 554         if (!layno) {
 555                 band = res->bands;
 556
 557                 for(bandno = 0; bandno < res->numbands; ++bandno) {
 558                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 559
 560                         opj_tgt_reset(prc->incltree);
 561                         opj_tgt_reset(prc->imsbtree);
 562
 563                         l_nb_blocks = prc->cw * prc->ch;
 564                         for     (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 565                                 cblk = &prc->cblks.enc[cblkno];
 566
 567                                 cblk->numpasses = 0;
 568                                 opj_tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
 569                         }
 570                         ++band;
 571                 }
 572         }
 573
 574         bio = opj_bio_create();
 575         opj_bio_init_enc(bio, c, length);
 576         opj_bio_write(bio, 1, 1);           /* Empty header bit */
 577
 578         /* Writing Packet header */
 579         band = res->bands;
 580         for (bandno = 0; bandno < res->numbands; ++bandno)      {
 581                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 582
 583                 l_nb_blocks = prc->cw * prc->ch;
 584                 cblk = prc->cblks.enc;
 585
 586                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 587                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 588
 589                         if (!cblk->numpasses && layer->numpasses) {
 590                                 opj_tgt_setvalue(prc->incltree, cblkno, layno);
 591                         }
 592
 593                         ++cblk;
 594                 }
 595
 596                 cblk = prc->cblks.enc;
 597                 for (cblkno = 0; cblkno < l_nb_blocks; cblkno++) {
 598                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 599                         OPJ_UINT32 increment = 0;
 600                         OPJ_UINT32 nump = 0;
 601                         OPJ_UINT32 len = 0, passno;
 602                         OPJ_UINT32 l_nb_passes;
 603
 604                         /* cblk inclusion bits */
 605                         if (!cblk->numpasses) {
 606                                 opj_tgt_encode(bio, prc->incltree, cblkno, layno + 1);
 607                         } else {
 608                                 opj_bio_write(bio, layer->numpasses != 0, 1);
 609                         }
 610
 611                         /* if cblk not included, go to the next cblk  */
 612                         if (!layer->numpasses) {
 613                                 ++cblk;
 614                                 continue;
 615                         }
 616
 617                         /* if first instance of cblk --> zero bit-planes information */
 618                         if (!cblk->numpasses) {
 619                                 cblk->numlenbits = 3;
 620                                 opj_tgt_encode(bio, prc->imsbtree, cblkno, 999);
 621                         }
 622
 623                         /* number of coding passes included */
 624                         opj_t2_putnumpasses(bio, layer->numpasses);
 625                         l_nb_passes = cblk->numpasses + layer->numpasses;
 626                         pass = cblk->passes +  cblk->numpasses;
 627
 628                         /* computation of the increase of the length indicator and insertion in the header     */
 629                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 630                                 ++nump;
 631                                 len += pass->len;
 632
 633                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 634                                         increment = opj_int_max(increment, opj_int_floorlog2(len) + 1 - (cblk->numlenbits + opj_int_floorlog2(nump)));
 635                                         len = 0;
 636                                         nump = 0;
 637                                 }
 638
 639                                 ++pass;
 640                         }
 641                         t2_putcommacode(bio, increment);
 642
 643                         /* computation of the new Length indicator */
 644                         cblk->numlenbits += increment;
 645
 646                         pass = cblk->passes +  cblk->numpasses;
 647                         /* insertion of the codeword segment length */
 648                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 649                                 nump++;
 650                                 len += pass->len;
 651
 652                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 653                                         opj_bio_write(bio, len, cblk->numlenbits + opj_int_floorlog2(nump));
 654                                         len = 0;
 655                                         nump = 0;
 656                                 }
 657                                 ++pass;
 658                         }
 659
 660                         ++cblk;
 661                 }
 662
 663                 ++band;
 664         }
 665
 666         if (!opj_bio_flush(bio)) {
 667                 opj_bio_destroy(bio);
 668                 return OPJ_FALSE;               /* modified to eliminate longjmp !! */
 669         }
 670
 671         l_nb_bytes = opj_bio_numbytes(bio);
 672         c += l_nb_bytes;
 673         length -= l_nb_bytes;
 674
 675         opj_bio_destroy(bio);
 676
 677         /* <EPH 0xff92> */
 678         if (tcp->csty & J2K_CP_CSTY_EPH) {
 679                 c[0] = 255;
 680                 c[1] = 146;
 681                 c += 2;
 682                 length -= 2;
 683         }
 684         /* </EPH> */
 685
 686         /* << INDEX */
 687         /* End of packet header position. Currently only represents the distance to start of packet
 688            Will be updated later by incrementing with packet start value*/
 689         if(cstr_info && cstr_info->index_write) {
 690                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 691                 info_PK->end_ph_pos = (OPJ_INT32)(c - dest);
 692         }
 693         /* INDEX >> */
 694
 695         /* Writing the packet body */
 696         band = res->bands;
 697         for (bandno = 0; bandno < res->numbands; bandno++) {
 698                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 699
 700                 l_nb_blocks = prc->cw * prc->ch;
 701                 cblk = prc->cblks.enc;
 702
 703                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 704                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 705
 706                         if (!layer->numpasses) {
 707                                 ++cblk;
 708                                 continue;
 709                         }
 710
 711                         if (layer->len > length) {
 712                                 return OPJ_FALSE;
 713                         }
 714
 715                         memcpy(c, layer->data, layer->len);
 716                         cblk->numpasses += layer->numpasses;
 717                         c += layer->len;
 718                         length -= layer->len;
 719
 720                         /* << INDEX */
 721                         if(cstr_info && cstr_info->index_write) {
 722                                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 723                                 info_PK->disto += layer->disto;
 724                                 if (cstr_info->D_max < info_PK->disto) {
 725                                         cstr_info->D_max = info_PK->disto;
 726                                 }
 727                         }
 728
 729                         ++cblk;
 730                         /* INDEX >> */
 731                 }
 732                 ++band;
 733         }
 734
 735         * p_data_written += (c - dest);
 736
 737         return OPJ_TRUE;
 738 }
 739
 740 static opj_bool opj_t2_skip_packet( opj_t2_t* p_t2,
 741                                     opj_tcd_tile_t *p_tile,
 742                                     opj_tcp_t *p_tcp,
 743                                     opj_pi_iterator_t *p_pi,
 744                                     OPJ_BYTE *p_src,
 745                                     OPJ_UINT32 * p_data_read,
 746                                     OPJ_UINT32 p_max_length,
 747                                     opj_packet_info_t *p_pack_info)
 748 {
 749         opj_bool l_read_data;
 750         OPJ_UINT32 l_nb_bytes_read = 0;
 751         OPJ_UINT32 l_nb_total_bytes_read = 0;
 752
 753         *p_data_read = 0;
 754
 755         if (! opj_t2_read_packet_header(p_t2,p_tile,p_tcp,p_pi,&l_read_data,p_src,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 756                 return OPJ_FALSE;
 757         }
 758
 759         p_src += l_nb_bytes_read;
 760         l_nb_total_bytes_read += l_nb_bytes_read;
 761         p_max_length -= l_nb_bytes_read;
 762
 763         /* we should read data for the packet */
 764         if (l_read_data) {
 765                 l_nb_bytes_read = 0;
 766
 767                 if (! opj_t2_skip_packet_data(p_t2,p_tile,p_pi,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 768                         return OPJ_FALSE;
 769                 }
 770
 771                 l_nb_total_bytes_read += l_nb_bytes_read;
 772         }
 773         *p_data_read = l_nb_total_bytes_read;
 774
 775         return OPJ_TRUE;
 776 }
 777
 778
 779
 780 opj_bool opj_t2_read_packet_header( opj_t2_t* p_t2,
 781                                     opj_tcd_tile_t *p_tile,
 782                                     opj_tcp_t *p_tcp,
 783                                     opj_pi_iterator_t *p_pi,
 784                                     opj_bool * p_is_data_present,
 785                                     OPJ_BYTE *p_src_data,
 786                                     OPJ_UINT32 * p_data_read,
 787                                     OPJ_UINT32 p_max_length,
 788                                     opj_packet_info_t *p_pack_info)
 789
 790 {
 791         /* loop */
 792         OPJ_UINT32 bandno, cblkno;
 793         OPJ_UINT32 l_nb_code_blocks;
 794         OPJ_UINT32 l_remaining_length;
 795         OPJ_UINT32 l_header_length;
 796         OPJ_UINT32 * l_modified_length_ptr = 00;
 797         OPJ_BYTE *l_current_data = p_src_data;
 798         opj_cp_t *l_cp = p_t2->cp;
 799         opj_bio_t *l_bio = 00;  /* BIO component */
 800         opj_tcd_band_t *l_band = 00;
 801         opj_tcd_cblk_dec_t* l_cblk = 00;
 802         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
 803
 804         OPJ_BYTE *l_header_data = 00;
 805         OPJ_BYTE **l_header_data_start = 00;
 806
 807         OPJ_UINT32 l_present;
 808
 809         if (p_pi->layno == 0) {
 810                 l_band = l_res->bands;
 811
 812                 /* reset tagtrees */
 813                 for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 814                         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
 815
 816                         if ( ! ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) ) {
 817                                 opj_tgt_reset(l_prc->incltree);
 818                                 opj_tgt_reset(l_prc->imsbtree);
 819                                 l_cblk = l_prc->cblks.dec;
 820
 821                                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 822                                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
 823                                         l_cblk->numsegs = 0;
 824                                         l_cblk->real_num_segs = 0;
 825                                         ++l_cblk;
 826                                 }
 827                         }
 828
 829                         ++l_band;
 830                 }
 831         }
 832
 833         /* SOP markers */
 834
 835         if (p_tcp->csty & J2K_CP_CSTY_SOP) {
 836                 if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
 837                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_WARNING, "Expected SOP marker\n"); */
 838                 } else {
 839                         l_current_data += 6;
 840                 }
 841
 842                 /** TODO : check the Nsop value */
 843         }
 844
 845         /*
 846         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
 847         This part deal with this caracteristic
 848         step 1: Read packet header in the saved structure
 849         step 2: Return to codestream for decoding
 850         */
 851
 852         l_bio = opj_bio_create();
 853         if (! l_bio) {
 854                 return OPJ_FALSE;
 855         }
 856
 857         if (l_cp->ppm == 1) { /* PPM */
 858                 l_header_data_start = &l_cp->ppm_data;
 859                 l_header_data = *l_header_data_start;
 860                 l_modified_length_ptr = &(l_cp->ppm_len);
 861
 862         }
 863         else if (p_tcp->ppt == 1) { /* PPT */
 864                 l_header_data_start = &(p_tcp->ppt_data);
 865                 l_header_data = *l_header_data_start;
 866                 l_modified_length_ptr = &(p_tcp->ppt_len);
 867         }
 868         else {  /* Normal Case */
 869                 l_header_data_start = &(l_current_data);
 870                 l_header_data = *l_header_data_start;
 871                 l_remaining_length = p_src_data+p_max_length-l_header_data;
 872                 l_modified_length_ptr = &(l_remaining_length);
 873         }
 874
 875         opj_bio_init_dec(l_bio, l_header_data,*l_modified_length_ptr);
 876
 877         l_present = opj_bio_read(l_bio, 1);
 878         if (!l_present) {
 879             /* TODO MSD: no test to control the output of this function*/
 880                 opj_bio_inalign(l_bio);
 881                 l_header_data += opj_bio_numbytes(l_bio);
 882                 opj_bio_destroy(l_bio);
 883
 884                 /* EPH markers */
 885                 if (p_tcp->csty & J2K_CP_CSTY_EPH) {
 886                         if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
 887                                 printf("Error : expected EPH marker\n");
 888                         } else {
 889                                 l_header_data += 2;
 890                         }
 891                 }
 892
 893                 l_header_length = (l_header_data - *l_header_data_start);
 894                 *l_modified_length_ptr -= l_header_length;
 895                 *l_header_data_start += l_header_length;
 896
 897                 /* << INDEX */
 898                 /* End of packet header position. Currently only represents the distance to start of packet
 899                    Will be updated later by incrementing with packet start value */
 900                 if (p_pack_info) {
 901                         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
 902                 }
 903                 /* INDEX >> */
 904
 905                 * p_is_data_present = OPJ_FALSE;
 906                 *p_data_read = l_current_data - p_src_data;
 907                 return OPJ_TRUE;
 908         }
 909
 910         l_band = l_res->bands;
 911         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 912                 opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
 913
 914                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
 915                         ++l_band;
 916                         continue;
 917                 }
 918
 919                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 920                 l_cblk = l_prc->cblks.dec;
 921                 for (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++) {
 922                         OPJ_UINT32 l_included,l_increment, l_segno;
 923                         OPJ_INT32 n;
 924
 925                         /* if cblk not yet included before --> inclusion tagtree */
 926                         if (!l_cblk->numsegs) {
 927                                 l_included = opj_tgt_decode(l_bio, l_prc->incltree, cblkno, p_pi->layno + 1);
 928                                 /* else one bit */
 929                         }
 930                         else {
 931                                 l_included = opj_bio_read(l_bio, 1);
 932                         }
 933
 934                         /* if cblk not included */
 935                         if (!l_included) {
 936                                 l_cblk->numnewpasses = 0;
 937                                 ++l_cblk;
 938                                 continue;
 939                         }
 940
 941                         /* if cblk not yet included --> zero-bitplane tagtree */
 942                         if (!l_cblk->numsegs) {
 943                                 OPJ_UINT32 i = 0;
 944
 945                                 while (!opj_tgt_decode(l_bio, l_prc->imsbtree, cblkno, i)) {
 946                                         ++i;
 947                                 }
 948
 949                                 l_cblk->numbps = l_band->numbps + 1 - i;
 950                                 l_cblk->numlenbits = 3;
 951                         }
 952
 953                         /* number of coding passes */
 954                         l_cblk->numnewpasses = opj_t2_getnumpasses(l_bio);
 955                         l_increment = opj_t2_getcommacode(l_bio);
 956
 957                         /* length indicator increment */
 958                         l_cblk->numlenbits += l_increment;
 959                         l_segno = 0;
 960
 961                         if (!l_cblk->numsegs) {
 962                                 if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1)) {
 963                                         opj_bio_destroy(l_bio);
 964                                         return OPJ_FALSE;
 965                                 }
 966                         }
 967                         else {
 968                                 l_segno = l_cblk->numsegs - 1;
 969                                 if (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses) {
 970                                         ++l_segno;
 971                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 972                                                 opj_bio_destroy(l_bio);
 973                                                 return OPJ_FALSE;
 974                                         }
 975                                 }
 976                         }
 977                         n = l_cblk->numnewpasses;
 978
 979                         do {
 980                                 l_cblk->segs[l_segno].numnewpasses = opj_int_min(l_cblk->segs[l_segno].maxpasses - l_cblk->segs[l_segno].numpasses, n);
 981                                 l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, l_cblk->numlenbits + opj_uint_floorlog2(l_cblk->segs[l_segno].numnewpasses));
 982
 983                                 n -= l_cblk->segs[l_segno].numnewpasses;
 984                                 if (n > 0) {
 985                                         ++l_segno;
 986
 987                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 988                                                 opj_bio_destroy(l_bio);
 989                                                 return OPJ_FALSE;
 990                                         }
 991                                 }
 992                         } while (n > 0);
 993
 994                         ++l_cblk;
 995                 }
 996
 997                 ++l_band;
 998         }
 999
1000         if (!opj_bio_inalign(l_bio)) {
1001                 opj_bio_destroy(l_bio);
1002                 return OPJ_FALSE;
1003         }
1004
1005         l_header_data += opj_bio_numbytes(l_bio);
1006         opj_bio_destroy(l_bio);
1007
1008         /* EPH markers */
1009         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1010                 if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1011                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_ERROR, "Expected EPH marker\n"); */
1012                 } else {
1013                         l_header_data += 2;
1014                 }
1015         }
1016
1017         l_header_length = (l_header_data - *l_header_data_start);
1018         *l_modified_length_ptr -= l_header_length;
1019         *l_header_data_start += l_header_length;
1020
1021         /* << INDEX */
1022         /* End of packet header position. Currently only represents the distance to start of packet
1023          Will be updated later by incrementing with packet start value */
1024         if (p_pack_info) {
1025                 p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1026         }
1027         /* INDEX >> */
1028
1029         *p_is_data_present = OPJ_TRUE;
1030         *p_data_read = l_current_data - p_src_data;
1031
1032         return OPJ_TRUE;
1033 }
1034
1035 opj_bool opj_t2_read_packet_data(   opj_t2_t* p_t2,
1036                                     opj_tcd_tile_t *p_tile,
1037                                     opj_pi_iterator_t *p_pi,
1038                                     OPJ_BYTE *p_src_data,
1039                                     OPJ_UINT32 * p_data_read,
1040                                     OPJ_UINT32 p_max_length,
1041                                     opj_packet_info_t *pack_info)
1042 {
1043         OPJ_UINT32 bandno, cblkno;
1044         OPJ_UINT32 l_nb_code_blocks;
1045         OPJ_BYTE *l_current_data = p_src_data;
1046         opj_tcd_band_t *l_band = 00;
1047         opj_tcd_cblk_dec_t* l_cblk = 00;
1048         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1049
1050         OPJ_ARG_NOT_USED(p_t2);
1051         OPJ_ARG_NOT_USED(pack_info);
1052
1053         l_band = l_res->bands;
1054         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1055                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1056
1057                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1058                         ++l_band;
1059                         continue;
1060                 }
1061
1062                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1063                 l_cblk = l_prc->cblks.dec;
1064
1065                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1066                         opj_tcd_seg_t *l_seg = 00;
1067
1068                         if (!l_cblk->numnewpasses) {
1069                                 /* nothing to do */
1070                                 ++l_cblk;
1071                                 continue;
1072                         }
1073
1074                         if (!l_cblk->numsegs) {
1075                                 l_seg = l_cblk->segs;
1076                                 ++l_cblk->numsegs;
1077                                 l_cblk->len = 0;
1078                         }
1079                         else {
1080                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1081
1082                                 if (l_seg->numpasses == l_seg->maxpasses) {
1083                                         ++l_seg;
1084                                         ++l_cblk->numsegs;
1085                                 }
1086                         }
1087
1088                         do {
1089                                 if (l_current_data + l_seg->newlen > p_src_data + p_max_length) {
1090                                         return OPJ_FALSE;
1091                                 }
1092
1093 #ifdef USE_JPWL
1094                         /* we need here a j2k handle to verify if making a check to
1095                         the validity of cblocks parameters is selected from user (-W) */
1096
1097                                 /* let's check that we are not exceeding */
1098                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1099                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1100                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1101                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1102                                         if (!JPWL_ASSUME) {
1103                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1104                                                 return OPJ_FALSE;
1105                                         }
1106                                         l_seg->newlen = 8192 - l_cblk->len;
1107                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1108                                         break;
1109                                 };
1110
1111 #endif /* USE_JPWL */
1112
1113                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1114                                         return OPJ_FALSE;
1115                                 }
1116
1117                                 memcpy(l_cblk->data + l_cblk->len, l_current_data, l_seg->newlen);
1118
1119                                 if (l_seg->numpasses == 0) {
1120                                         l_seg->data = &l_cblk->data;
1121                                         l_seg->dataindex = l_cblk->len;
1122                                 }
1123
1124                                 l_current_data += l_seg->newlen;
1125                                 l_seg->numpasses += l_seg->numnewpasses;
1126                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1127
1128                                 l_seg->real_num_passes = l_seg->numpasses;
1129                                 l_cblk->len += l_seg->newlen;
1130                                 l_seg->len += l_seg->newlen;
1131
1132                                 if (l_cblk->numnewpasses > 0) {
1133                                         ++l_seg;
1134                                         ++l_cblk->numsegs;
1135                                 }
1136                         } while (l_cblk->numnewpasses > 0);
1137
1138                         l_cblk->real_num_segs = l_cblk->numsegs;
1139                         ++l_cblk;
1140                 }
1141
1142                 ++l_band;
1143         }
1144
1145         *(p_data_read) = l_current_data - p_src_data;
1146
1147         return OPJ_TRUE;
1148 }
1149
1150 opj_bool opj_t2_skip_packet_data(   opj_t2_t* p_t2,
1151                                     opj_tcd_tile_t *p_tile,
1152                                     opj_pi_iterator_t *p_pi,
1153                                     OPJ_UINT32 * p_data_read,
1154                                     OPJ_UINT32 p_max_length,
1155                                     opj_packet_info_t *pack_info)
1156 {
1157         OPJ_UINT32 bandno, cblkno;
1158         OPJ_UINT32 l_nb_code_blocks;
1159         opj_tcd_band_t *l_band = 00;
1160         opj_tcd_cblk_dec_t* l_cblk = 00;
1161         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1162
1163         OPJ_ARG_NOT_USED(p_t2);
1164         OPJ_ARG_NOT_USED(pack_info);
1165
1166         *p_data_read = 0;
1167         l_band = l_res->bands;
1168
1169         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1170                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1171
1172                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1173                         ++l_band;
1174                         continue;
1175                 }
1176
1177                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1178                 l_cblk = l_prc->cblks.dec;
1179
1180                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1181                         opj_tcd_seg_t *l_seg = 00;
1182
1183                         if (!l_cblk->numnewpasses) {
1184                                 /* nothing to do */
1185                                 ++l_cblk;
1186                                 continue;
1187                         }
1188
1189                         if (!l_cblk->numsegs) {
1190                                 l_seg = l_cblk->segs;
1191                                 ++l_cblk->numsegs;
1192                                 l_cblk->len = 0;
1193                         }
1194                         else {
1195                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1196
1197                                 if (l_seg->numpasses == l_seg->maxpasses) {
1198                                         ++l_seg;
1199                                         ++l_cblk->numsegs;
1200                                 }
1201                         }
1202
1203                         do {
1204                                 if (* p_data_read + l_seg->newlen > p_max_length) {
1205                                         return OPJ_FALSE;
1206                                 }
1207
1208 #ifdef USE_JPWL
1209                         /* we need here a j2k handle to verify if making a check to
1210                         the validity of cblocks parameters is selected from user (-W) */
1211
1212                                 /* let's check that we are not exceeding */
1213                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1214                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1215                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1216                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1217                                         if (!JPWL_ASSUME) {
1218                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1219                                                 return -999;
1220                                         }
1221                                         l_seg->newlen = 8192 - l_cblk->len;
1222                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1223                                         break;
1224                                 };
1225
1226 #endif /* USE_JPWL */
1227                                 *(p_data_read) += l_seg->newlen;
1228
1229                                 l_seg->numpasses += l_seg->numnewpasses;
1230                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1231                                 if (l_cblk->numnewpasses > 0)
1232                                 {
1233                                         ++l_seg;
1234                                         ++l_cblk->numsegs;
1235                                 }
1236                         } while (l_cblk->numnewpasses > 0);
1237
1238                         ++l_cblk;
1239                 }
1240
1241                 ++l_band;
1242         }
1243
1244         return OPJ_TRUE;
1245 }
1246
1247
1248 opj_bool opj_t2_init_seg(   opj_tcd_cblk_dec_t* cblk,
1249                             OPJ_UINT32 index,
1250                             OPJ_UINT32 cblksty,
1251                             OPJ_UINT32 first)
1252 {
1253         opj_tcd_seg_t* seg = 00;
1254         OPJ_UINT32 l_nb_segs = index + 1;
1255
1256         if (l_nb_segs > cblk->m_current_max_segs) {
1257                 opj_tcd_seg_t* new_segs;
1258                 cblk->m_current_max_segs += J2K_DEFAULT_NB_SEGS;
1259
1260                 new_segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, cblk->m_current_max_segs * sizeof(opj_tcd_seg_t));
1261                 if(! new_segs) {
1262                         opj_free(cblk->segs);
1263                         cblk->segs = NULL;
1264                         cblk->m_current_max_segs = 0;
1265                         /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to initialize segment %d\n", l_nb_segs); */
1266                         return OPJ_FALSE;
1267                 }
1268                 cblk->segs = new_segs;
1269         }
1270
1271         seg = &cblk->segs[index];
1272         memset(seg,0,sizeof(opj_tcd_seg_t));
1273
1274         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1275                 seg->maxpasses = 1;
1276         }
1277         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1278                 if (first) {
1279                         seg->maxpasses = 10;
1280                 } else {
1281                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1282                 }
1283         } else {
1284                 seg->maxpasses = 109;
1285         }
1286
1287         return OPJ_TRUE;
1288 }