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         OPJ_UINT32 curtp = 0;
 331         OPJ_UINT32 tp_start_packno;
 332         opj_packet_info_t *l_pack_info = 00;
 333         opj_image_comp_t* l_img_comp = 00;
 334
 335 #ifdef TODO_MSD
 336         if (p_cstr_index) {
 337                 l_pack_info = p_cstr_index->tile_index[p_tile_no].packet;
 338         }
 339 #endif
 340
 341         /* create a packet iterator */
 342         l_pi = opj_pi_create_decode(l_image, l_cp, p_tile_no);
 343         if (!l_pi) {
 344                 return OPJ_FALSE;
 345         }
 346
 347         tp_start_packno = 0;
 348         l_current_pi = l_pi;
 349
 350         for     (pino = 0; pino <= l_tcp->numpocs; ++pino) {
 351
 352                 /* if the resolution needed is to low, one dim of the tilec could be equal to zero
 353                  * and no packets are used to encode this resolution and
 354                  * l_current_pi->resno is always >= p_tile->comps[l_current_pi->compno].minimum_num_resolutions
 355                  * and no l_img_comp->resno_decoded are computed
 356                  */
 357                 opj_bool* first_pass_failed = (opj_bool*)opj_malloc(l_image->numcomps * sizeof(opj_bool));
 358                 memset(first_pass_failed, OPJ_TRUE, l_image->numcomps * sizeof(opj_bool));
 359
 360                 while (opj_pi_next(l_current_pi)) {
 361
 362
 363                         if (l_tcp->num_layers_to_decode > l_current_pi->layno
 364                                         && l_current_pi->resno < p_tile->comps[l_current_pi->compno].minimum_num_resolutions) {
 365                                 l_nb_bytes_read = 0;
 366
 367                                 first_pass_failed[l_current_pi->compno] = OPJ_FALSE;
 368
 369                                 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)) {
 370                                         opj_pi_destroy(l_pi,l_nb_pocs);
 371                                         return OPJ_FALSE;
 372                                 }
 373
 374                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 375                                 l_img_comp->resno_decoded = opj_uint_max(l_current_pi->resno, l_img_comp->resno_decoded);
 376                         }
 377                         else {
 378                                 l_nb_bytes_read = 0;
 379                                 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)) {
 380                                         opj_pi_destroy(l_pi,l_nb_pocs);
 381                                         return OPJ_FALSE;
 382                                 }
 383                         }
 384
 385                         if (first_pass_failed[l_current_pi->compno]) {
 386                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 387                                 if (l_img_comp->resno_decoded == 0)
 388                                         l_img_comp->resno_decoded = p_tile->comps[l_current_pi->compno].minimum_num_resolutions - 1;
 389                         }
 390
 391                         l_current_data += l_nb_bytes_read;
 392                         p_max_len -= l_nb_bytes_read;
 393
 394                         /* INDEX >> */
 395 #ifdef TODO_MSD
 396                         if(p_cstr_info) {
 397                                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 398                                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 399                                 if (!p_cstr_info->packno) {
 400                                         info_PK->start_pos = info_TL->end_header + 1;
 401                                 } 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 */
 402                                         info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno - tp_start_packno; /* Number of packets in previous tile-part */
 403                                         tp_start_packno = p_cstr_info->packno;
 404                                         curtp++;
 405                                         info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header+1;
 406                                 } else {
 407                                         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;
 408                                 }
 409                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 410                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance */
 411                                 ++p_cstr_info->packno;
 412                         }
 413 #endif
 414                         /* << INDEX */
 415                 }
 416                 ++l_current_pi;
 417
 418                 opj_free(first_pass_failed);
 419         }
 420         /* INDEX >> */
 421 #ifdef TODO_MSD
 422         if
 423                 (p_cstr_info) {
 424                 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 */
 425         }
 426 #endif
 427         /* << INDEX */
 428
 429         /* don't forget to release pi */
 430         opj_pi_destroy(l_pi,l_nb_pocs);
 431         *p_data_read = l_current_data - p_src;
 432         return OPJ_TRUE;
 433 }
 434
 435 /* ----------------------------------------------------------------------- */
 436
 437 /**
 438  * Creates a Tier 2 handle
 439  *
 440  * @param       p_image         Source or destination image
 441  * @param       p_cp            Image coding parameters.
 442  * @return              a new T2 handle if successful, NULL otherwise.
 443 */
 444 opj_t2_t* opj_t2_create(opj_image_t *p_image, opj_cp_t *p_cp)
 445 {
 446         /* create the t2 structure */
 447         opj_t2_t *l_t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
 448         if (!l_t2) {
 449                 return NULL;
 450         }
 451         memset(l_t2,0,sizeof(opj_t2_t));
 452
 453         l_t2->image = p_image;
 454         l_t2->cp = p_cp;
 455
 456         return l_t2;
 457 }
 458
 459 void opj_t2_destroy(opj_t2_t *t2) {
 460         if(t2) {
 461                 opj_free(t2);
 462         }
 463 }
 464
 465 opj_bool opj_t2_decode_packet(  opj_t2_t* p_t2,
 466                                 opj_tcd_tile_t *p_tile,
 467                                 opj_tcp_t *p_tcp,
 468                                 opj_pi_iterator_t *p_pi,
 469                                 OPJ_BYTE *p_src,
 470                                 OPJ_UINT32 * p_data_read,
 471                                 OPJ_UINT32 p_max_length,
 472                                 opj_packet_info_t *p_pack_info)
 473 {
 474         opj_bool l_read_data;
 475         OPJ_UINT32 l_nb_bytes_read = 0;
 476         OPJ_UINT32 l_nb_total_bytes_read = 0;
 477
 478         *p_data_read = 0;
 479
 480         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)) {
 481                 return OPJ_FALSE;
 482         }
 483
 484         p_src += l_nb_bytes_read;
 485         l_nb_total_bytes_read += l_nb_bytes_read;
 486         p_max_length -= l_nb_bytes_read;
 487
 488         /* we should read data for the packet */
 489         if (l_read_data) {
 490                 l_nb_bytes_read = 0;
 491
 492                 if (! opj_t2_read_packet_data(p_t2,p_tile,p_pi,p_src,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 493                         return OPJ_FALSE;
 494                 }
 495
 496                 l_nb_total_bytes_read += l_nb_bytes_read;
 497         }
 498
 499         *p_data_read = l_nb_total_bytes_read;
 500
 501         return OPJ_TRUE;
 502 }
 503
 504 opj_bool opj_t2_encode_packet(  OPJ_UINT32 tileno,
 505                                 opj_tcd_tile_t * tile,
 506                                 opj_tcp_t * tcp,
 507                                 opj_pi_iterator_t *pi,
 508                                 OPJ_BYTE *dest,
 509                                 OPJ_UINT32 * p_data_written,
 510                                 OPJ_UINT32 length,
 511                                 opj_codestream_info_t *cstr_info)
 512 {
 513         OPJ_UINT32 bandno, cblkno;
 514         OPJ_BYTE *c = dest;
 515         OPJ_UINT32 l_nb_bytes;
 516         OPJ_UINT32 compno = pi->compno; /* component value */
 517         OPJ_UINT32 resno  = pi->resno;          /* resolution level value */
 518         OPJ_UINT32 precno = pi->precno; /* precinct value */
 519         OPJ_UINT32 layno  = pi->layno;          /* quality layer value */
 520         OPJ_UINT32 l_nb_blocks;
 521         opj_tcd_band_t *band = 00;
 522         opj_tcd_cblk_enc_t* cblk = 00;
 523         opj_tcd_pass_t *pass = 00;
 524
 525         opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 526         opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 527
 528         opj_bio_t *bio = 00;    /* BIO component */
 529
 530         /* <SOP 0xff91> */
 531         if (tcp->csty & J2K_CP_CSTY_SOP) {
 532                 c[0] = 255;
 533                 c[1] = 145;
 534                 c[2] = 0;
 535                 c[3] = 4;
 536                 c[4] = (tile->packno % 65536) / 256;
 537                 c[5] = (tile->packno % 65536) % 256;
 538                 c += 6;
 539                 length -= 6;
 540         }
 541         /* </SOP> */
 542
 543         if (!layno) {
 544                 band = res->bands;
 545
 546                 for(bandno = 0; bandno < res->numbands; ++bandno) {
 547                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 548
 549                         opj_tgt_reset(prc->incltree);
 550                         opj_tgt_reset(prc->imsbtree);
 551
 552                         l_nb_blocks = prc->cw * prc->ch;
 553                         for     (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 554                                 opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno];
 555
 556                                 cblk->numpasses = 0;
 557                                 opj_tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
 558                         }
 559                         ++band;
 560                 }
 561         }
 562
 563         bio = opj_bio_create();
 564         opj_bio_init_enc(bio, c, length);
 565         opj_bio_write(bio, 1, 1);           /* Empty header bit */
 566
 567         /* Writing Packet header */
 568         band = res->bands;
 569         for (bandno = 0; bandno < res->numbands; ++bandno)      {
 570                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 571
 572                 l_nb_blocks = prc->cw * prc->ch;
 573                 cblk = prc->cblks.enc;
 574
 575                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 576                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 577
 578                         if (!cblk->numpasses && layer->numpasses) {
 579                                 opj_tgt_setvalue(prc->incltree, cblkno, layno);
 580                         }
 581
 582                         ++cblk;
 583                 }
 584
 585                 cblk = prc->cblks.enc;
 586                 for (cblkno = 0; cblkno < l_nb_blocks; cblkno++) {
 587                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 588                         OPJ_UINT32 increment = 0;
 589                         OPJ_UINT32 nump = 0;
 590                         OPJ_UINT32 len = 0, passno;
 591                         OPJ_UINT32 l_nb_passes;
 592
 593                         /* cblk inclusion bits */
 594                         if (!cblk->numpasses) {
 595                                 opj_tgt_encode(bio, prc->incltree, cblkno, layno + 1);
 596                         } else {
 597                                 opj_bio_write(bio, layer->numpasses != 0, 1);
 598                         }
 599
 600                         /* if cblk not included, go to the next cblk  */
 601                         if (!layer->numpasses) {
 602                                 ++cblk;
 603                                 continue;
 604                         }
 605
 606                         /* if first instance of cblk --> zero bit-planes information */
 607                         if (!cblk->numpasses) {
 608                                 cblk->numlenbits = 3;
 609                                 opj_tgt_encode(bio, prc->imsbtree, cblkno, 999);
 610                         }
 611
 612                         /* number of coding passes included */
 613                         opj_t2_putnumpasses(bio, layer->numpasses);
 614                         l_nb_passes = cblk->numpasses + layer->numpasses;
 615                         pass = cblk->passes +  cblk->numpasses;
 616
 617                         /* computation of the increase of the length indicator and insertion in the header     */
 618                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 619                                 ++nump;
 620                                 len += pass->len;
 621
 622                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 623                                         increment = opj_int_max(increment, opj_int_floorlog2(len) + 1 - (cblk->numlenbits + opj_int_floorlog2(nump)));
 624                                         len = 0;
 625                                         nump = 0;
 626                                 }
 627
 628                                 ++pass;
 629                         }
 630                         t2_putcommacode(bio, increment);
 631
 632                         /* computation of the new Length indicator */
 633                         cblk->numlenbits += increment;
 634
 635                         pass = cblk->passes +  cblk->numpasses;
 636                         /* insertion of the codeword segment length */
 637                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 638                                 nump++;
 639                                 len += pass->len;
 640
 641                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 642                                         opj_bio_write(bio, len, cblk->numlenbits + opj_int_floorlog2(nump));
 643                                         len = 0;
 644                                         nump = 0;
 645                                 }
 646                                 ++pass;
 647                         }
 648
 649                         ++cblk;
 650                 }
 651
 652                 ++band;
 653         }
 654
 655         if (!opj_bio_flush(bio)) {
 656                 opj_bio_destroy(bio);
 657                 return OPJ_FALSE;               /* modified to eliminate longjmp !! */
 658         }
 659
 660         l_nb_bytes = opj_bio_numbytes(bio);
 661         c += l_nb_bytes;
 662         length -= l_nb_bytes;
 663
 664         opj_bio_destroy(bio);
 665
 666         /* <EPH 0xff92> */
 667         if (tcp->csty & J2K_CP_CSTY_EPH) {
 668                 c[0] = 255;
 669                 c[1] = 146;
 670                 c += 2;
 671                 length -= 2;
 672         }
 673         /* </EPH> */
 674
 675         /* << INDEX */
 676         /* End of packet header position. Currently only represents the distance to start of packet
 677            Will be updated later by incrementing with packet start value*/
 678         if(cstr_info && cstr_info->index_write) {
 679                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 680                 info_PK->end_ph_pos = (OPJ_INT32)(c - dest);
 681         }
 682         /* INDEX >> */
 683
 684         /* Writing the packet body */
 685         band = res->bands;
 686         for (bandno = 0; bandno < res->numbands; bandno++) {
 687                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 688
 689                 l_nb_blocks = prc->cw * prc->ch;
 690                 cblk = prc->cblks.enc;
 691
 692                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 693                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 694
 695                         if (!layer->numpasses) {
 696                                 ++cblk;
 697                                 continue;
 698                         }
 699
 700                         if (layer->len > length) {
 701                                 return OPJ_FALSE;
 702                         }
 703
 704                         memcpy(c, layer->data, layer->len);
 705                         cblk->numpasses += layer->numpasses;
 706                         c += layer->len;
 707                         length -= layer->len;
 708
 709                         /* << INDEX */
 710                         if(cstr_info && cstr_info->index_write) {
 711                                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 712                                 info_PK->disto += layer->disto;
 713                                 if (cstr_info->D_max < info_PK->disto) {
 714                                         cstr_info->D_max = info_PK->disto;
 715                                 }
 716                         }
 717
 718                         ++cblk;
 719                         /* INDEX >> */
 720                 }
 721                 ++band;
 722         }
 723
 724         * p_data_written += (c - dest);
 725
 726         return OPJ_TRUE;
 727 }
 728
 729 static opj_bool opj_t2_skip_packet( opj_t2_t* p_t2,
 730                                     opj_tcd_tile_t *p_tile,
 731                                     opj_tcp_t *p_tcp,
 732                                     opj_pi_iterator_t *p_pi,
 733                                     OPJ_BYTE *p_src,
 734                                     OPJ_UINT32 * p_data_read,
 735                                     OPJ_UINT32 p_max_length,
 736                                     opj_packet_info_t *p_pack_info)
 737 {
 738         opj_bool l_read_data;
 739         OPJ_UINT32 l_nb_bytes_read = 0;
 740         OPJ_UINT32 l_nb_total_bytes_read = 0;
 741
 742         *p_data_read = 0;
 743
 744         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)) {
 745                 return OPJ_FALSE;
 746         }
 747
 748         p_src += l_nb_bytes_read;
 749         l_nb_total_bytes_read += l_nb_bytes_read;
 750         p_max_length -= l_nb_bytes_read;
 751
 752         /* we should read data for the packet */
 753         if (l_read_data) {
 754                 l_nb_bytes_read = 0;
 755
 756                 if (! opj_t2_skip_packet_data(p_t2,p_tile,p_pi,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 757                         return OPJ_FALSE;
 758                 }
 759
 760                 l_nb_total_bytes_read += l_nb_bytes_read;
 761         }
 762         *p_data_read = l_nb_total_bytes_read;
 763
 764         return OPJ_TRUE;
 765 }
 766
 767
 768
 769 opj_bool opj_t2_read_packet_header( opj_t2_t* p_t2,
 770                                     opj_tcd_tile_t *p_tile,
 771                                     opj_tcp_t *p_tcp,
 772                                     opj_pi_iterator_t *p_pi,
 773                                     opj_bool * p_is_data_present,
 774                                     OPJ_BYTE *p_src_data,
 775                                     OPJ_UINT32 * p_data_read,
 776                                     OPJ_UINT32 p_max_length,
 777                                     opj_packet_info_t *p_pack_info)
 778
 779 {
 780         /* loop */
 781         OPJ_UINT32 bandno, cblkno;
 782         OPJ_UINT32 l_nb_code_blocks;
 783         OPJ_UINT32 l_remaining_length;
 784         OPJ_UINT32 l_header_length;
 785         OPJ_UINT32 * l_modified_length_ptr = 00;
 786         OPJ_BYTE *l_current_data = p_src_data;
 787         opj_cp_t *l_cp = p_t2->cp;
 788         opj_bio_t *l_bio = 00;  /* BIO component */
 789         opj_tcd_band_t *l_band = 00;
 790         opj_tcd_cblk_dec_t* l_cblk = 00;
 791         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
 792
 793         OPJ_BYTE *l_header_data = 00;
 794         OPJ_BYTE **l_header_data_start = 00;
 795
 796         OPJ_UINT32 l_present;
 797
 798         if (p_pi->layno == 0) {
 799                 l_band = l_res->bands;
 800
 801                 /* reset tagtrees */
 802                 for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 803                         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
 804
 805                         if ( ! ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) ) {
 806                                 opj_tgt_reset(l_prc->incltree);
 807                                 opj_tgt_reset(l_prc->imsbtree);
 808                                 l_cblk = l_prc->cblks.dec;
 809
 810                                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 811                                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
 812                                         l_cblk->numsegs = 0;
 813                                         l_cblk->real_num_segs = 0;
 814                                         ++l_cblk;
 815                                 }
 816                         }
 817
 818                         ++l_band;
 819                 }
 820         }
 821
 822         /* SOP markers */
 823
 824         if (p_tcp->csty & J2K_CP_CSTY_SOP) {
 825                 if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
 826                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_WARNING, "Expected SOP marker\n"); */
 827                 } else {
 828                         l_current_data += 6;
 829                 }
 830
 831                 /** TODO : check the Nsop value */
 832         }
 833
 834         /*
 835         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
 836         This part deal with this caracteristic
 837         step 1: Read packet header in the saved structure
 838         step 2: Return to codestream for decoding
 839         */
 840
 841         l_bio = opj_bio_create();
 842         if (! l_bio) {
 843                 return OPJ_FALSE;
 844         }
 845
 846         if (l_cp->ppm == 1) { /* PPM */
 847                 l_header_data_start = &l_cp->ppm_data;
 848                 l_header_data = *l_header_data_start;
 849                 l_modified_length_ptr = &(l_cp->ppm_len);
 850
 851         }
 852         else if (p_tcp->ppt == 1) { /* PPT */
 853                 l_header_data_start = &(p_tcp->ppt_data);
 854                 l_header_data = *l_header_data_start;
 855                 l_modified_length_ptr = &(p_tcp->ppt_len);
 856         }
 857         else {  /* Normal Case */
 858                 l_header_data_start = &(l_current_data);
 859                 l_header_data = *l_header_data_start;
 860                 l_remaining_length = p_src_data+p_max_length-l_header_data;
 861                 l_modified_length_ptr = &(l_remaining_length);
 862         }
 863
 864         opj_bio_init_dec(l_bio, l_header_data,*l_modified_length_ptr);
 865
 866         l_present = opj_bio_read(l_bio, 1);
 867         if (!l_present) {
 868             /* TODO MSD: no test to control the output of this function*/
 869                 opj_bio_inalign(l_bio);
 870                 l_header_data += opj_bio_numbytes(l_bio);
 871                 opj_bio_destroy(l_bio);
 872
 873                 /* EPH markers */
 874                 if (p_tcp->csty & J2K_CP_CSTY_EPH) {
 875                         if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
 876                                 printf("Error : expected EPH marker\n");
 877                         } else {
 878                                 l_header_data += 2;
 879                         }
 880                 }
 881
 882                 l_header_length = (l_header_data - *l_header_data_start);
 883                 *l_modified_length_ptr -= l_header_length;
 884                 *l_header_data_start += l_header_length;
 885
 886                 /* << INDEX */
 887                 /* End of packet header position. Currently only represents the distance to start of packet
 888                    Will be updated later by incrementing with packet start value */
 889                 if (p_pack_info) {
 890                         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
 891                 }
 892                 /* INDEX >> */
 893
 894                 * p_is_data_present = OPJ_FALSE;
 895                 *p_data_read = l_current_data - p_src_data;
 896                 return OPJ_TRUE;
 897         }
 898
 899         l_band = l_res->bands;
 900         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 901                 opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
 902
 903                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
 904                         ++l_band;
 905                         continue;
 906                 }
 907
 908                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 909                 l_cblk = l_prc->cblks.dec;
 910                 for (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++) {
 911                         OPJ_UINT32 l_included,l_increment, l_segno;
 912                         OPJ_INT32 n;
 913
 914                         /* if cblk not yet included before --> inclusion tagtree */
 915                         if (!l_cblk->numsegs) {
 916                                 l_included = opj_tgt_decode(l_bio, l_prc->incltree, cblkno, p_pi->layno + 1);
 917                                 /* else one bit */
 918                         }
 919                         else {
 920                                 l_included = opj_bio_read(l_bio, 1);
 921                         }
 922
 923                         /* if cblk not included */
 924                         if (!l_included) {
 925                                 l_cblk->numnewpasses = 0;
 926                                 ++l_cblk;
 927                                 continue;
 928                         }
 929
 930                         /* if cblk not yet included --> zero-bitplane tagtree */
 931                         if (!l_cblk->numsegs) {
 932                                 OPJ_UINT32 i = 0;
 933
 934                                 while (!opj_tgt_decode(l_bio, l_prc->imsbtree, cblkno, i)) {
 935                                         ++i;
 936                                 }
 937
 938                                 l_cblk->numbps = l_band->numbps + 1 - i;
 939                                 l_cblk->numlenbits = 3;
 940                         }
 941
 942                         /* number of coding passes */
 943                         l_cblk->numnewpasses = opj_t2_getnumpasses(l_bio);
 944                         l_increment = opj_t2_getcommacode(l_bio);
 945
 946                         /* length indicator increment */
 947                         l_cblk->numlenbits += l_increment;
 948                         l_segno = 0;
 949
 950                         if (!l_cblk->numsegs) {
 951                                 if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1)) {
 952                                         opj_bio_destroy(l_bio);
 953                                         return OPJ_FALSE;
 954                                 }
 955                         }
 956                         else {
 957                                 l_segno = l_cblk->numsegs - 1;
 958                                 if (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses) {
 959                                         ++l_segno;
 960                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 961                                                 opj_bio_destroy(l_bio);
 962                                                 return OPJ_FALSE;
 963                                         }
 964                                 }
 965                         }
 966                         n = l_cblk->numnewpasses;
 967
 968                         do {
 969                                 l_cblk->segs[l_segno].numnewpasses = opj_int_min(l_cblk->segs[l_segno].maxpasses - l_cblk->segs[l_segno].numpasses, n);
 970                                 l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, l_cblk->numlenbits + opj_uint_floorlog2(l_cblk->segs[l_segno].numnewpasses));
 971
 972                                 n -= l_cblk->segs[l_segno].numnewpasses;
 973                                 if (n > 0) {
 974                                         ++l_segno;
 975
 976                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 977                                                 opj_bio_destroy(l_bio);
 978                                                 return OPJ_FALSE;
 979                                         }
 980                                 }
 981                         } while (n > 0);
 982
 983                         ++l_cblk;
 984                 }
 985
 986                 ++l_band;
 987         }
 988
 989         if (!opj_bio_inalign(l_bio)) {
 990                 opj_bio_destroy(l_bio);
 991                 return OPJ_FALSE;
 992         }
 993
 994         l_header_data += opj_bio_numbytes(l_bio);
 995         opj_bio_destroy(l_bio);
 996
 997         /* EPH markers */
 998         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
 999                 if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1000                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_ERROR, "Expected EPH marker\n"); */
1001                 } else {
1002                         l_header_data += 2;
1003                 }
1004         }
1005
1006         l_header_length = (l_header_data - *l_header_data_start);
1007         *l_modified_length_ptr -= l_header_length;
1008         *l_header_data_start += l_header_length;
1009
1010         /* << INDEX */
1011         /* End of packet header position. Currently only represents the distance to start of packet
1012          Will be updated later by incrementing with packet start value */
1013         if (p_pack_info) {
1014                 p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1015         }
1016         /* INDEX >> */
1017
1018         *p_is_data_present = OPJ_TRUE;
1019         *p_data_read = l_current_data - p_src_data;
1020
1021         return OPJ_TRUE;
1022 }
1023
1024 opj_bool opj_t2_read_packet_data(   opj_t2_t* p_t2,
1025                                     opj_tcd_tile_t *p_tile,
1026                                     opj_pi_iterator_t *p_pi,
1027                                     OPJ_BYTE *p_src_data,
1028                                     OPJ_UINT32 * p_data_read,
1029                                     OPJ_UINT32 p_max_length,
1030                                     opj_packet_info_t *pack_info)
1031 {
1032         OPJ_UINT32 bandno, cblkno;
1033         OPJ_UINT32 l_nb_code_blocks;
1034         OPJ_BYTE *l_current_data = p_src_data;
1035         opj_tcd_band_t *l_band = 00;
1036         opj_tcd_cblk_dec_t* l_cblk = 00;
1037         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1038
1039         l_band = l_res->bands;
1040         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1041                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1042
1043                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1044                         ++l_band;
1045                         continue;
1046                 }
1047
1048                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1049                 l_cblk = l_prc->cblks.dec;
1050
1051                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1052                         opj_tcd_seg_t *l_seg = 00;
1053
1054                         if (!l_cblk->numnewpasses) {
1055                                 /* nothing to do */
1056                                 ++l_cblk;
1057                                 continue;
1058                         }
1059
1060                         if (!l_cblk->numsegs) {
1061                                 l_seg = l_cblk->segs;
1062                                 ++l_cblk->numsegs;
1063                                 l_cblk->len = 0;
1064                         }
1065                         else {
1066                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1067
1068                                 if (l_seg->numpasses == l_seg->maxpasses) {
1069                                         ++l_seg;
1070                                         ++l_cblk->numsegs;
1071                                 }
1072                         }
1073
1074                         do {
1075                                 if (l_current_data + l_seg->newlen > p_src_data + p_max_length) {
1076                                         return OPJ_FALSE;
1077                                 }
1078
1079 #ifdef USE_JPWL
1080                         /* we need here a j2k handle to verify if making a check to
1081                         the validity of cblocks parameters is selected from user (-W) */
1082
1083                                 /* let's check that we are not exceeding */
1084                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1085                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1086                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1087                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1088                                         if (!JPWL_ASSUME) {
1089                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1090                                                 return OPJ_FALSE;
1091                                         }
1092                                         l_seg->newlen = 8192 - l_cblk->len;
1093                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1094                                         break;
1095                                 };
1096
1097 #endif /* USE_JPWL */
1098
1099                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1100                                         return OPJ_FALSE;
1101                                 }
1102
1103                                 memcpy(l_cblk->data + l_cblk->len, l_current_data, l_seg->newlen);
1104
1105                                 if (l_seg->numpasses == 0) {
1106                                         l_seg->data = &l_cblk->data;
1107                                         l_seg->dataindex = l_cblk->len;
1108                                 }
1109
1110                                 l_current_data += l_seg->newlen;
1111                                 l_seg->numpasses += l_seg->numnewpasses;
1112                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1113
1114                                 l_seg->real_num_passes = l_seg->numpasses;
1115                                 l_cblk->len += l_seg->newlen;
1116                                 l_seg->len += l_seg->newlen;
1117
1118                                 if (l_cblk->numnewpasses > 0) {
1119                                         ++l_seg;
1120                                         ++l_cblk->numsegs;
1121                                 }
1122                         } while (l_cblk->numnewpasses > 0);
1123
1124                         l_cblk->real_num_segs = l_cblk->numsegs;
1125                         ++l_cblk;
1126                 }
1127
1128                 ++l_band;
1129         }
1130
1131         *(p_data_read) = l_current_data - p_src_data;
1132
1133         return OPJ_TRUE;
1134 }
1135
1136 opj_bool opj_t2_skip_packet_data(   opj_t2_t* p_t2,
1137                                     opj_tcd_tile_t *p_tile,
1138                                     opj_pi_iterator_t *p_pi,
1139                                     OPJ_UINT32 * p_data_read,
1140                                     OPJ_UINT32 p_max_length,
1141                                     opj_packet_info_t *pack_info)
1142 {
1143         OPJ_UINT32 bandno, cblkno;
1144         OPJ_UINT32 l_nb_code_blocks;
1145         opj_tcd_band_t *l_band = 00;
1146         opj_tcd_cblk_dec_t* l_cblk = 00;
1147         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1148
1149         *p_data_read = 0;
1150         l_band = l_res->bands;
1151
1152         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1153                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1154
1155                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1156                         ++l_band;
1157                         continue;
1158                 }
1159
1160                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1161                 l_cblk = l_prc->cblks.dec;
1162
1163                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1164                         opj_tcd_seg_t *l_seg = 00;
1165
1166                         if (!l_cblk->numnewpasses) {
1167                                 /* nothing to do */
1168                                 ++l_cblk;
1169                                 continue;
1170                         }
1171
1172                         if (!l_cblk->numsegs) {
1173                                 l_seg = l_cblk->segs;
1174                                 ++l_cblk->numsegs;
1175                                 l_cblk->len = 0;
1176                         }
1177                         else {
1178                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1179
1180                                 if (l_seg->numpasses == l_seg->maxpasses) {
1181                                         ++l_seg;
1182                                         ++l_cblk->numsegs;
1183                                 }
1184                         }
1185
1186                         do {
1187                                 if (* p_data_read + l_seg->newlen > p_max_length) {
1188                                         return OPJ_FALSE;
1189                                 }
1190
1191 #ifdef USE_JPWL
1192                         /* we need here a j2k handle to verify if making a check to
1193                         the validity of cblocks parameters is selected from user (-W) */
1194
1195                                 /* let's check that we are not exceeding */
1196                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1197                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1198                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1199                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1200                                         if (!JPWL_ASSUME) {
1201                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1202                                                 return -999;
1203                                         }
1204                                         l_seg->newlen = 8192 - l_cblk->len;
1205                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1206                                         break;
1207                                 };
1208
1209 #endif /* USE_JPWL */
1210                                 *(p_data_read) += l_seg->newlen;
1211
1212                                 l_seg->numpasses += l_seg->numnewpasses;
1213                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1214                                 if (l_cblk->numnewpasses > 0)
1215                                 {
1216                                         ++l_seg;
1217                                         ++l_cblk->numsegs;
1218                                 }
1219                         } while (l_cblk->numnewpasses > 0);
1220
1221                         ++l_cblk;
1222                 }
1223
1224                 ++l_band;
1225         }
1226
1227         return OPJ_TRUE;
1228 }
1229
1230
1231 opj_bool opj_t2_init_seg(   opj_tcd_cblk_dec_t* cblk,
1232                             OPJ_UINT32 index,
1233                             OPJ_UINT32 cblksty,
1234                             OPJ_UINT32 first)
1235 {
1236         opj_tcd_seg_t* seg = 00;
1237         OPJ_UINT32 l_nb_segs = index + 1;
1238
1239         if (l_nb_segs > cblk->m_current_max_segs) {
1240                 opj_tcd_seg_t* new_segs;
1241                 cblk->m_current_max_segs += J2K_DEFAULT_NB_SEGS;
1242
1243                 new_segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, cblk->m_current_max_segs * sizeof(opj_tcd_seg_t));
1244                 if(! new_segs) {
1245                         opj_free(cblk->segs);
1246                         cblk->segs = NULL;
1247                         cblk->m_current_max_segs = 0;
1248                         /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to initialize segment %d\n", l_nb_segs); */
1249                         return OPJ_FALSE;
1250                 }
1251                 cblk->segs = new_segs;
1252         }
1253
1254         seg = &cblk->segs[index];
1255         memset(seg,0,sizeof(opj_tcd_seg_t));
1256
1257         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1258                 seg->maxpasses = 1;
1259         }
1260         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1261                 if (first) {
1262                         seg->maxpasses = 10;
1263                 } else {
1264                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1265                 }
1266         } else {
1267                 seg->maxpasses = 109;
1268         }
1269
1270         return OPJ_TRUE;
1271 }