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  * Copyright (c) 2008;2011-2012, Centre National d'Etudes Spatiales (CNES), France
   9  * Copyright (c) 2012, CS Systemes d'Information, France
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "opj_includes.h"
  35
  36 /** @defgroup T2 T2 - Implementation of a tier-2 coding */
  37 /*@{*/
  38
  39 /** @name Local static functions */
  40 /*@{*/
  41
  42 static void t2_putcommacode(opj_bio_t *bio, int n);
  43
  44 static OPJ_UINT32 opj_t2_getcommacode(opj_bio_t *bio);
  45 /**
  46 Variable length code for signalling delta Zil (truncation point)
  47 @param bio  Bit Input/Output component
  48 @param n    delta Zil
  49 */
  50 static void opj_t2_putnumpasses(opj_bio_t *bio, OPJ_UINT32 n);
  51 static OPJ_UINT32 opj_t2_getnumpasses(opj_bio_t *bio);
  52
  53 /**
  54 Encode a packet of a tile to a destination buffer
  55 @param tileno Number of the tile encoded
  56 @param tile Tile for which to write the packets
  57 @param tcp Tile coding parameters
  58 @param pi Packet identity
  59 @param dest Destination buffer
  60 @param p_data_written   FIXME DOC
  61 @param len Length of the destination buffer
  62 @param cstr_info Codestream information structure
  63 @return
  64 */
  65 static OPJ_BOOL opj_t2_encode_packet(   OPJ_UINT32 tileno,
  66                                         opj_tcd_tile_t *tile,
  67                                         opj_tcp_t *tcp,
  68                                         opj_pi_iterator_t *pi,
  69                                         OPJ_BYTE *dest,
  70                                         OPJ_UINT32 * p_data_written,
  71                                         OPJ_UINT32 len,
  72                                         opj_codestream_info_t *cstr_info);
  73
  74 /**
  75 Decode a packet of a tile from a source buffer
  76 @param t2 T2 handle
  77 @param tile Tile for which to write the packets
  78 @param tcp Tile coding parameters
  79 @param pi Packet identity
  80 @param src Source buffer
  81 @param data_read   FIXME DOC
  82 @param max_length  FIXME DOC
  83 @param pack_info Packet information
  84
  85 @return  FIXME DOC
  86 */
  87 static OPJ_BOOL opj_t2_decode_packet(   opj_t2_t* t2,
  88                                         opj_tcd_tile_t *tile,
  89                                         opj_tcp_t *tcp,
  90                                         opj_pi_iterator_t *pi,
  91                                         OPJ_BYTE *src,
  92                                         OPJ_UINT32 * data_read,
  93                                         OPJ_UINT32 max_length,
  94                                         opj_packet_info_t *pack_info);
  95
  96 static OPJ_BOOL opj_t2_skip_packet( opj_t2_t* p_t2,
  97                                     opj_tcd_tile_t *p_tile,
  98                                     opj_tcp_t *p_tcp,
  99                                     opj_pi_iterator_t *p_pi,
 100                                     OPJ_BYTE *p_src,
 101                                     OPJ_UINT32 * p_data_read,
 102                                     OPJ_UINT32 p_max_length,
 103                                     opj_packet_info_t *p_pack_info);
 104
 105 static OPJ_BOOL opj_t2_read_packet_header(  opj_t2_t* p_t2,
 106                                             opj_tcd_tile_t *p_tile,
 107                                             opj_tcp_t *p_tcp,
 108                                             opj_pi_iterator_t *p_pi,
 109                                             OPJ_BOOL * p_is_data_present,
 110                                             OPJ_BYTE *p_src_data,
 111                                             OPJ_UINT32 * p_data_read,
 112                                             OPJ_UINT32 p_max_length,
 113                                             opj_packet_info_t *p_pack_info);
 114
 115 static OPJ_BOOL opj_t2_read_packet_data(opj_t2_t* p_t2,
 116                                         opj_tcd_tile_t *p_tile,
 117                                         opj_pi_iterator_t *p_pi,
 118                                         OPJ_BYTE *p_src_data,
 119                                         OPJ_UINT32 * p_data_read,
 120                                         OPJ_UINT32 p_max_length,
 121                                         opj_packet_info_t *pack_info);
 122
 123 static OPJ_BOOL opj_t2_skip_packet_data(opj_t2_t* p_t2,
 124                                         opj_tcd_tile_t *p_tile,
 125                                         opj_pi_iterator_t *p_pi,
 126                                         OPJ_UINT32 * p_data_read,
 127                                         OPJ_UINT32 p_max_length,
 128                                         opj_packet_info_t *pack_info);
 129
 130 /**
 131 @param cblk
 132 @param index
 133 @param cblksty
 134 @param first
 135 */
 136 static OPJ_BOOL opj_t2_init_seg(    opj_tcd_cblk_dec_t* cblk,
 137                                     OPJ_UINT32 index,
 138                                     OPJ_UINT32 cblksty,
 139                                     OPJ_UINT32 first);
 140
 141 /*@}*/
 142
 143 /*@}*/
 144
 145 /* ----------------------------------------------------------------------- */
 146
 147 /* #define RESTART 0x04 */
 148 /* TODO MSD->LHE */
 149 static void t2_putcommacode(opj_bio_t *bio, int n) {
 150         while (--n >= 0) {
 151                 opj_bio_write(bio, 1, 1);
 152         }
 153         opj_bio_write(bio, 0, 1);
 154 }
 155
 156 OPJ_UINT32 opj_t2_getcommacode(opj_bio_t *bio)
 157 {
 158     OPJ_UINT32 n = 0;
 159     while (opj_bio_read(bio, 1)) {
 160             ++n;
 161     }
 162     return n;
 163 }
 164
 165 void opj_t2_putnumpasses(opj_bio_t *bio, OPJ_UINT32 n) {
 166         if (n == 1) {
 167                 opj_bio_write(bio, 0, 1);
 168         } else if (n == 2) {
 169                 opj_bio_write(bio, 2, 2);
 170         } else if (n <= 5) {
 171                 opj_bio_write(bio, 0xc | (n - 3), 4);
 172         } else if (n <= 36) {
 173                 opj_bio_write(bio, 0x1e0 | (n - 6), 9);
 174         } else if (n <= 164) {
 175                 opj_bio_write(bio, 0xff80 | (n - 37), 16);
 176         }
 177 }
 178
 179 OPJ_UINT32 opj_t2_getnumpasses(opj_bio_t *bio) {
 180         OPJ_UINT32 n;
 181         if (!opj_bio_read(bio, 1))
 182                 return 1;
 183         if (!opj_bio_read(bio, 1))
 184                 return 2;
 185         if ((n = opj_bio_read(bio, 2)) != 3)
 186                 return (3 + n);
 187         if ((n = opj_bio_read(bio, 5)) != 31)
 188                 return (6 + n);
 189         return (37 + opj_bio_read(bio, 7));
 190 }
 191
 192 /* ----------------------------------------------------------------------- */
 193
 194 OPJ_BOOL opj_t2_encode_packets( opj_t2_t* p_t2,
 195                                 OPJ_UINT32 p_tile_no,
 196                                 opj_tcd_tile_t *p_tile,
 197                                 OPJ_UINT32 p_maxlayers,
 198                                 OPJ_BYTE *p_dest,
 199                                 OPJ_UINT32 * p_data_written,
 200                                 OPJ_UINT32 p_max_len,
 201                                 opj_codestream_info_t *cstr_info,
 202                                 OPJ_UINT32 p_tp_num,
 203                                 OPJ_INT32 p_tp_pos,
 204                                 OPJ_UINT32 p_pino,
 205                                 J2K_T2_MODE p_t2_mode)
 206 {
 207         OPJ_BYTE *l_current_data = p_dest;
 208         OPJ_UINT32 l_nb_bytes = 0;
 209         OPJ_UINT32 compno;
 210         OPJ_UINT32 poc;
 211         opj_pi_iterator_t *l_pi = 00;
 212         opj_pi_iterator_t *l_current_pi = 00;
 213         opj_image_t *l_image = p_t2->image;
 214         opj_cp_t *l_cp = p_t2->cp;
 215         opj_tcp_t *l_tcp = &l_cp->tcps[p_tile_no];
 216         OPJ_UINT32 pocno = l_cp->m_specific_param.m_enc.m_cinema == OPJ_CINEMA4K_24? 2: 1;
 217         OPJ_UINT32 l_max_comp = l_cp->m_specific_param.m_enc.m_max_comp_size > 0 ? l_image->numcomps : 1;
 218         OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 219
 220         l_pi = opj_pi_initialise_encode(l_image, l_cp, p_tile_no, p_t2_mode);
 221         if (!l_pi) {
 222                 return OPJ_FALSE;
 223         }
 224
 225         * p_data_written = 0;
 226
 227         if (p_t2_mode == THRESH_CALC ){ /* Calculating threshold */
 228                 l_current_pi = l_pi;
 229
 230                 for     (compno = 0; compno < l_max_comp; ++compno) {
 231                         OPJ_UINT32 l_comp_len = 0;
 232                         l_current_pi = l_pi;
 233
 234                         for (poc = 0; poc < pocno ; ++poc) {
 235                                 OPJ_UINT32 l_tp_num = compno;
 236
 237                                 /* TODO MSD : check why this function cannot fail (cf. v1) */
 238                                 opj_pi_create_encode(l_pi, l_cp,p_tile_no,poc,l_tp_num,p_tp_pos,p_t2_mode);
 239
 240                                 while (opj_pi_next(l_current_pi)) {
 241                                         if (l_current_pi->layno < p_maxlayers) {
 242                                                 l_nb_bytes = 0;
 243
 244                                                 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)) {
 245                                                         opj_pi_destroy(l_pi, l_nb_pocs);
 246                                                         return OPJ_FALSE;
 247                                                 }
 248
 249                                                 l_comp_len += l_nb_bytes;
 250                                                 l_current_data += l_nb_bytes;
 251                                                 p_max_len -= l_nb_bytes;
 252
 253                                                 * p_data_written += l_nb_bytes;
 254                                         }
 255                                 }
 256
 257                                 if (l_cp->m_specific_param.m_enc.m_max_comp_size) {
 258                                         if (l_comp_len > l_cp->m_specific_param.m_enc.m_max_comp_size) {
 259                                                 opj_pi_destroy(l_pi, l_nb_pocs);
 260                                                 return OPJ_FALSE;
 261                                         }
 262                                 }
 263
 264                                 ++l_current_pi;
 265                         }
 266                 }
 267         }
 268         else {  /* t2_mode == FINAL_PASS  */
 269                 opj_pi_create_encode(l_pi, l_cp,p_tile_no,p_pino,p_tp_num,p_tp_pos,p_t2_mode);
 270
 271                 l_current_pi = &l_pi[p_pino];
 272
 273                 while (opj_pi_next(l_current_pi)) {
 274                         if (l_current_pi->layno < p_maxlayers) {
 275                                 l_nb_bytes=0;
 276
 277                                 if (! opj_t2_encode_packet(p_tile_no,p_tile, l_tcp, l_current_pi, l_current_data, &l_nb_bytes, p_max_len, cstr_info)) {
 278                                         opj_pi_destroy(l_pi, l_nb_pocs);
 279                                         return OPJ_FALSE;
 280                                 }
 281
 282                                 l_current_data += l_nb_bytes;
 283                                 p_max_len -= l_nb_bytes;
 284
 285                                 * p_data_written += l_nb_bytes;
 286
 287                                 /* INDEX >> */
 288                                 if(cstr_info) {
 289                                         if(cstr_info->index_write) {
 290                                                 opj_tile_info_t *info_TL = &cstr_info->tile[p_tile_no];
 291                                                 opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno];
 292                                                 if (!cstr_info->packno) {
 293                                                         info_PK->start_pos = info_TL->end_header + 1;
 294                                                 } else {
 295                                                         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;
 296                                                 }
 297                                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes - 1;
 298                                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance
 299                                                                                                                                                                                                                                                    to start of packet is incremented by value of start of packet*/
 300                                         }
 301
 302                                         cstr_info->packno++;
 303                                 }
 304                                 /* << INDEX */
 305                                 ++p_tile->packno;
 306                         }
 307                 }
 308         }
 309
 310         opj_pi_destroy(l_pi, l_nb_pocs);
 311
 312         return OPJ_TRUE;
 313 }
 314
 315 OPJ_BOOL opj_t2_decode_packets( opj_t2_t *p_t2,
 316                                 OPJ_UINT32 p_tile_no,
 317                                 opj_tcd_tile_t *p_tile,
 318                                 OPJ_BYTE *p_src,
 319                                 OPJ_UINT32 * p_data_read,
 320                                 OPJ_UINT32 p_max_len,
 321                                 opj_codestream_index_t *p_cstr_index)
 322 {
 323         OPJ_BYTE *l_current_data = p_src;
 324         opj_pi_iterator_t *l_pi = 00;
 325         OPJ_UINT32 pino;
 326         opj_image_t *l_image = p_t2->image;
 327         opj_cp_t *l_cp = p_t2->cp;
 328         opj_tcp_t *l_tcp = &(p_t2->cp->tcps[p_tile_no]);
 329         OPJ_UINT32 l_nb_bytes_read;
 330         OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 331         opj_pi_iterator_t *l_current_pi = 00;
 332 #ifdef TODO_MSD
 333         OPJ_UINT32 curtp = 0;
 334         OPJ_UINT32 tp_start_packno;
 335 #endif
 336         opj_packet_info_t *l_pack_info = 00;
 337         opj_image_comp_t* l_img_comp = 00;
 338
 339         OPJ_ARG_NOT_USED(p_cstr_index);
 340
 341 #ifdef TODO_MSD
 342         if (p_cstr_index) {
 343                 l_pack_info = p_cstr_index->tile_index[p_tile_no].packet;
 344         }
 345 #endif
 346
 347         /* create a packet iterator */
 348         l_pi = opj_pi_create_decode(l_image, l_cp, p_tile_no);
 349         if (!l_pi) {
 350                 return OPJ_FALSE;
 351         }
 352
 353
 354         l_current_pi = l_pi;
 355
 356         for     (pino = 0; pino <= l_tcp->numpocs; ++pino) {
 357
 358                 /* if the resolution needed is to low, one dim of the tilec could be equal to zero
 359                  * and no packets are used to encode this resolution and
 360                  * l_current_pi->resno is always >= p_tile->comps[l_current_pi->compno].minimum_num_resolutions
 361                  * and no l_img_comp->resno_decoded are computed
 362                  */
 363                 OPJ_BOOL* first_pass_failed = (OPJ_BOOL*)opj_malloc(l_image->numcomps * sizeof(OPJ_BOOL));
 364                 if (!first_pass_failed)
 365                 {
 366                     opj_pi_destroy(l_pi,l_nb_pocs);
 367                     return OPJ_FALSE;
 368                 }
 369                 memset(first_pass_failed, OPJ_TRUE, l_image->numcomps * sizeof(OPJ_BOOL));
 370
 371                 while (opj_pi_next(l_current_pi)) {
 372
 373
 374                         if (l_tcp->num_layers_to_decode > l_current_pi->layno
 375                                         && l_current_pi->resno < p_tile->comps[l_current_pi->compno].minimum_num_resolutions) {
 376                                 l_nb_bytes_read = 0;
 377
 378                                 first_pass_failed[l_current_pi->compno] = OPJ_FALSE;
 379
 380                                 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)) {
 381                                         opj_pi_destroy(l_pi,l_nb_pocs);
 382                                         opj_free(first_pass_failed);
 383                                         return OPJ_FALSE;
 384                                 }
 385
 386                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 387                                 l_img_comp->resno_decoded = opj_uint_max(l_current_pi->resno, l_img_comp->resno_decoded);
 388                         }
 389                         else {
 390                                 l_nb_bytes_read = 0;
 391                                 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)) {
 392                                         opj_pi_destroy(l_pi,l_nb_pocs);
 393                                         opj_free(first_pass_failed);
 394                                         return OPJ_FALSE;
 395                                 }
 396                         }
 397
 398                         if (first_pass_failed[l_current_pi->compno]) {
 399                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 400                                 if (l_img_comp->resno_decoded == 0)
 401                                         l_img_comp->resno_decoded = p_tile->comps[l_current_pi->compno].minimum_num_resolutions - 1;
 402                         }
 403
 404                         l_current_data += l_nb_bytes_read;
 405                         p_max_len -= l_nb_bytes_read;
 406
 407                         /* INDEX >> */
 408 #ifdef TODO_MSD
 409                         if(p_cstr_info) {
 410                                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 411                                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 412                                 tp_start_packno = 0;
 413                                 if (!p_cstr_info->packno) {
 414                                         info_PK->start_pos = info_TL->end_header + 1;
 415                                 } 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 */
 416                                         info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno - tp_start_packno; /* Number of packets in previous tile-part */
 417                                         tp_start_packno = p_cstr_info->packno;
 418                                         curtp++;
 419                                         info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header+1;
 420                                 } else {
 421                                         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;
 422                                 }
 423                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 424                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance */
 425                                 ++p_cstr_info->packno;
 426                         }
 427 #endif
 428                         /* << INDEX */
 429                 }
 430                 ++l_current_pi;
 431
 432                 opj_free(first_pass_failed);
 433         }
 434         /* INDEX >> */
 435 #ifdef TODO_MSD
 436         if
 437                 (p_cstr_info) {
 438                 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 */
 439         }
 440 #endif
 441         /* << INDEX */
 442
 443         /* don't forget to release pi */
 444         opj_pi_destroy(l_pi,l_nb_pocs);
 445         *p_data_read = l_current_data - p_src;
 446         return OPJ_TRUE;
 447 }
 448
 449 /* ----------------------------------------------------------------------- */
 450
 451 /**
 452  * Creates a Tier 2 handle
 453  *
 454  * @param       p_image         Source or destination image
 455  * @param       p_cp            Image coding parameters.
 456  * @return              a new T2 handle if successful, NULL otherwise.
 457 */
 458 opj_t2_t* opj_t2_create(opj_image_t *p_image, opj_cp_t *p_cp)
 459 {
 460         /* create the t2 structure */
 461         opj_t2_t *l_t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
 462         if (!l_t2) {
 463                 return NULL;
 464         }
 465         memset(l_t2,0,sizeof(opj_t2_t));
 466
 467         l_t2->image = p_image;
 468         l_t2->cp = p_cp;
 469
 470         return l_t2;
 471 }
 472
 473 void opj_t2_destroy(opj_t2_t *t2) {
 474         if(t2) {
 475                 opj_free(t2);
 476         }
 477 }
 478
 479 OPJ_BOOL opj_t2_decode_packet(  opj_t2_t* p_t2,
 480                                 opj_tcd_tile_t *p_tile,
 481                                 opj_tcp_t *p_tcp,
 482                                 opj_pi_iterator_t *p_pi,
 483                                 OPJ_BYTE *p_src,
 484                                 OPJ_UINT32 * p_data_read,
 485                                 OPJ_UINT32 p_max_length,
 486                                 opj_packet_info_t *p_pack_info)
 487 {
 488         OPJ_BOOL l_read_data;
 489         OPJ_UINT32 l_nb_bytes_read = 0;
 490         OPJ_UINT32 l_nb_total_bytes_read = 0;
 491
 492         *p_data_read = 0;
 493
 494         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)) {
 495                 return OPJ_FALSE;
 496         }
 497
 498         p_src += l_nb_bytes_read;
 499         l_nb_total_bytes_read += l_nb_bytes_read;
 500         p_max_length -= l_nb_bytes_read;
 501
 502         /* we should read data for the packet */
 503         if (l_read_data) {
 504                 l_nb_bytes_read = 0;
 505
 506                 if (! opj_t2_read_packet_data(p_t2,p_tile,p_pi,p_src,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 507                         return OPJ_FALSE;
 508                 }
 509
 510                 l_nb_total_bytes_read += l_nb_bytes_read;
 511         }
 512
 513         *p_data_read = l_nb_total_bytes_read;
 514
 515         return OPJ_TRUE;
 516 }
 517
 518 OPJ_BOOL opj_t2_encode_packet(  OPJ_UINT32 tileno,
 519                                 opj_tcd_tile_t * tile,
 520                                 opj_tcp_t * tcp,
 521                                 opj_pi_iterator_t *pi,
 522                                 OPJ_BYTE *dest,
 523                                 OPJ_UINT32 * p_data_written,
 524                                 OPJ_UINT32 length,
 525                                 opj_codestream_info_t *cstr_info)
 526 {
 527         OPJ_UINT32 bandno, cblkno;
 528         OPJ_BYTE *c = dest;
 529         OPJ_UINT32 l_nb_bytes;
 530         OPJ_UINT32 compno = pi->compno; /* component value */
 531         OPJ_UINT32 resno  = pi->resno;          /* resolution level value */
 532         OPJ_UINT32 precno = pi->precno; /* precinct value */
 533         OPJ_UINT32 layno  = pi->layno;          /* quality layer value */
 534         OPJ_UINT32 l_nb_blocks;
 535         opj_tcd_band_t *band = 00;
 536         opj_tcd_cblk_enc_t* cblk = 00;
 537         opj_tcd_pass_t *pass = 00;
 538
 539         opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 540         opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 541
 542         opj_bio_t *bio = 00;    /* BIO component */
 543
 544         /* <SOP 0xff91> */
 545         if (tcp->csty & J2K_CP_CSTY_SOP) {
 546                 c[0] = 255;
 547                 c[1] = 145;
 548                 c[2] = 0;
 549                 c[3] = 4;
 550                 c[4] = (tile->packno % 65536) / 256;
 551                 c[5] = (tile->packno % 65536) % 256;
 552                 c += 6;
 553                 length -= 6;
 554         }
 555         /* </SOP> */
 556
 557         if (!layno) {
 558                 band = res->bands;
 559
 560                 for(bandno = 0; bandno < res->numbands; ++bandno) {
 561                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 562
 563                         opj_tgt_reset(prc->incltree);
 564                         opj_tgt_reset(prc->imsbtree);
 565
 566                         l_nb_blocks = prc->cw * prc->ch;
 567                         for     (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 568                                 cblk = &prc->cblks.enc[cblkno];
 569
 570                                 cblk->numpasses = 0;
 571                                 opj_tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
 572                         }
 573                         ++band;
 574                 }
 575         }
 576
 577         bio = opj_bio_create();
 578         opj_bio_init_enc(bio, c, length);
 579         opj_bio_write(bio, 1, 1);           /* Empty header bit */
 580
 581         /* Writing Packet header */
 582         band = res->bands;
 583         for (bandno = 0; bandno < res->numbands; ++bandno)      {
 584                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 585
 586                 l_nb_blocks = prc->cw * prc->ch;
 587                 cblk = prc->cblks.enc;
 588
 589                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 590                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 591
 592                         if (!cblk->numpasses && layer->numpasses) {
 593                                 opj_tgt_setvalue(prc->incltree, cblkno, layno);
 594                         }
 595
 596                         ++cblk;
 597                 }
 598
 599                 cblk = prc->cblks.enc;
 600                 for (cblkno = 0; cblkno < l_nb_blocks; cblkno++) {
 601                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 602                         OPJ_UINT32 increment = 0;
 603                         OPJ_UINT32 nump = 0;
 604                         OPJ_UINT32 len = 0, passno;
 605                         OPJ_UINT32 l_nb_passes;
 606
 607                         /* cblk inclusion bits */
 608                         if (!cblk->numpasses) {
 609                                 opj_tgt_encode(bio, prc->incltree, cblkno, layno + 1);
 610                         } else {
 611                                 opj_bio_write(bio, layer->numpasses != 0, 1);
 612                         }
 613
 614                         /* if cblk not included, go to the next cblk  */
 615                         if (!layer->numpasses) {
 616                                 ++cblk;
 617                                 continue;
 618                         }
 619
 620                         /* if first instance of cblk --> zero bit-planes information */
 621                         if (!cblk->numpasses) {
 622                                 cblk->numlenbits = 3;
 623                                 opj_tgt_encode(bio, prc->imsbtree, cblkno, 999);
 624                         }
 625
 626                         /* number of coding passes included */
 627                         opj_t2_putnumpasses(bio, layer->numpasses);
 628                         l_nb_passes = cblk->numpasses + layer->numpasses;
 629                         pass = cblk->passes +  cblk->numpasses;
 630
 631                         /* computation of the increase of the length indicator and insertion in the header     */
 632                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 633                                 ++nump;
 634                                 len += pass->len;
 635
 636                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 637                                         increment = opj_int_max(increment, opj_int_floorlog2(len) + 1 - (cblk->numlenbits + opj_int_floorlog2(nump)));
 638                                         len = 0;
 639                                         nump = 0;
 640                                 }
 641
 642                                 ++pass;
 643                         }
 644                         t2_putcommacode(bio, increment);
 645
 646                         /* computation of the new Length indicator */
 647                         cblk->numlenbits += increment;
 648
 649                         pass = cblk->passes +  cblk->numpasses;
 650                         /* insertion of the codeword segment length */
 651                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 652                                 nump++;
 653                                 len += pass->len;
 654
 655                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 656                                         opj_bio_write(bio, len, cblk->numlenbits + opj_int_floorlog2(nump));
 657                                         len = 0;
 658                                         nump = 0;
 659                                 }
 660                                 ++pass;
 661                         }
 662
 663                         ++cblk;
 664                 }
 665
 666                 ++band;
 667         }
 668
 669         if (!opj_bio_flush(bio)) {
 670                 opj_bio_destroy(bio);
 671                 return OPJ_FALSE;               /* modified to eliminate longjmp !! */
 672         }
 673
 674         l_nb_bytes = opj_bio_numbytes(bio);
 675         c += l_nb_bytes;
 676         length -= l_nb_bytes;
 677
 678         opj_bio_destroy(bio);
 679
 680         /* <EPH 0xff92> */
 681         if (tcp->csty & J2K_CP_CSTY_EPH) {
 682                 c[0] = 255;
 683                 c[1] = 146;
 684                 c += 2;
 685                 length -= 2;
 686         }
 687         /* </EPH> */
 688
 689         /* << INDEX */
 690         /* End of packet header position. Currently only represents the distance to start of packet
 691            Will be updated later by incrementing with packet start value*/
 692         if(cstr_info && cstr_info->index_write) {
 693                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 694                 info_PK->end_ph_pos = (OPJ_INT32)(c - dest);
 695         }
 696         /* INDEX >> */
 697
 698         /* Writing the packet body */
 699         band = res->bands;
 700         for (bandno = 0; bandno < res->numbands; bandno++) {
 701                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 702
 703                 l_nb_blocks = prc->cw * prc->ch;
 704                 cblk = prc->cblks.enc;
 705
 706                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 707                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 708
 709                         if (!layer->numpasses) {
 710                                 ++cblk;
 711                                 continue;
 712                         }
 713
 714                         if (layer->len > length) {
 715                                 return OPJ_FALSE;
 716                         }
 717
 718                         memcpy(c, layer->data, layer->len);
 719                         cblk->numpasses += layer->numpasses;
 720                         c += layer->len;
 721                         length -= layer->len;
 722
 723                         /* << INDEX */
 724                         if(cstr_info && cstr_info->index_write) {
 725                                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 726                                 info_PK->disto += layer->disto;
 727                                 if (cstr_info->D_max < info_PK->disto) {
 728                                         cstr_info->D_max = info_PK->disto;
 729                                 }
 730                         }
 731
 732                         ++cblk;
 733                         /* INDEX >> */
 734                 }
 735                 ++band;
 736         }
 737
 738         * p_data_written += (c - dest);
 739
 740         return OPJ_TRUE;
 741 }
 742
 743 static OPJ_BOOL opj_t2_skip_packet( opj_t2_t* p_t2,
 744                                     opj_tcd_tile_t *p_tile,
 745                                     opj_tcp_t *p_tcp,
 746                                     opj_pi_iterator_t *p_pi,
 747                                     OPJ_BYTE *p_src,
 748                                     OPJ_UINT32 * p_data_read,
 749                                     OPJ_UINT32 p_max_length,
 750                                     opj_packet_info_t *p_pack_info)
 751 {
 752         OPJ_BOOL l_read_data;
 753         OPJ_UINT32 l_nb_bytes_read = 0;
 754         OPJ_UINT32 l_nb_total_bytes_read = 0;
 755
 756         *p_data_read = 0;
 757
 758         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)) {
 759                 return OPJ_FALSE;
 760         }
 761
 762         p_src += l_nb_bytes_read;
 763         l_nb_total_bytes_read += l_nb_bytes_read;
 764         p_max_length -= l_nb_bytes_read;
 765
 766         /* we should read data for the packet */
 767         if (l_read_data) {
 768                 l_nb_bytes_read = 0;
 769
 770                 if (! opj_t2_skip_packet_data(p_t2,p_tile,p_pi,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 771                         return OPJ_FALSE;
 772                 }
 773
 774                 l_nb_total_bytes_read += l_nb_bytes_read;
 775         }
 776         *p_data_read = l_nb_total_bytes_read;
 777
 778         return OPJ_TRUE;
 779 }
 780
 781
 782
 783 OPJ_BOOL opj_t2_read_packet_header( opj_t2_t* p_t2,
 784                                     opj_tcd_tile_t *p_tile,
 785                                     opj_tcp_t *p_tcp,
 786                                     opj_pi_iterator_t *p_pi,
 787                                     OPJ_BOOL * p_is_data_present,
 788                                     OPJ_BYTE *p_src_data,
 789                                     OPJ_UINT32 * p_data_read,
 790                                     OPJ_UINT32 p_max_length,
 791                                     opj_packet_info_t *p_pack_info)
 792
 793 {
 794         /* loop */
 795         OPJ_UINT32 bandno, cblkno;
 796         OPJ_UINT32 l_nb_code_blocks;
 797         OPJ_UINT32 l_remaining_length;
 798         OPJ_UINT32 l_header_length;
 799         OPJ_UINT32 * l_modified_length_ptr = 00;
 800         OPJ_BYTE *l_current_data = p_src_data;
 801         opj_cp_t *l_cp = p_t2->cp;
 802         opj_bio_t *l_bio = 00;  /* BIO component */
 803         opj_tcd_band_t *l_band = 00;
 804         opj_tcd_cblk_dec_t* l_cblk = 00;
 805         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
 806
 807         OPJ_BYTE *l_header_data = 00;
 808         OPJ_BYTE **l_header_data_start = 00;
 809
 810         OPJ_UINT32 l_present;
 811
 812         if (p_pi->layno == 0) {
 813                 l_band = l_res->bands;
 814
 815                 /* reset tagtrees */
 816                 for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 817                         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
 818
 819                         if ( ! ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) ) {
 820                                 opj_tgt_reset(l_prc->incltree);
 821                                 opj_tgt_reset(l_prc->imsbtree);
 822                                 l_cblk = l_prc->cblks.dec;
 823
 824                                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 825                                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
 826                                         l_cblk->numsegs = 0;
 827                                         l_cblk->real_num_segs = 0;
 828                                         ++l_cblk;
 829                                 }
 830                         }
 831
 832                         ++l_band;
 833                 }
 834         }
 835
 836         /* SOP markers */
 837
 838         if (p_tcp->csty & J2K_CP_CSTY_SOP) {
 839                 if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
 840                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_WARNING, "Expected SOP marker\n"); */
 841                 } else {
 842                         l_current_data += 6;
 843                 }
 844
 845                 /** TODO : check the Nsop value */
 846         }
 847
 848         /*
 849         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
 850         This part deal with this caracteristic
 851         step 1: Read packet header in the saved structure
 852         step 2: Return to codestream for decoding
 853         */
 854
 855         l_bio = opj_bio_create();
 856         if (! l_bio) {
 857                 return OPJ_FALSE;
 858         }
 859
 860         if (l_cp->ppm == 1) { /* PPM */
 861                 l_header_data_start = &l_cp->ppm_data;
 862                 l_header_data = *l_header_data_start;
 863                 l_modified_length_ptr = &(l_cp->ppm_len);
 864
 865         }
 866         else if (p_tcp->ppt == 1) { /* PPT */
 867                 l_header_data_start = &(p_tcp->ppt_data);
 868                 l_header_data = *l_header_data_start;
 869                 l_modified_length_ptr = &(p_tcp->ppt_len);
 870         }
 871         else {  /* Normal Case */
 872                 l_header_data_start = &(l_current_data);
 873                 l_header_data = *l_header_data_start;
 874                 l_remaining_length = p_src_data+p_max_length-l_header_data;
 875                 l_modified_length_ptr = &(l_remaining_length);
 876         }
 877
 878         opj_bio_init_dec(l_bio, l_header_data,*l_modified_length_ptr);
 879
 880         l_present = opj_bio_read(l_bio, 1);
 881         if (!l_present) {
 882             /* TODO MSD: no test to control the output of this function*/
 883                 opj_bio_inalign(l_bio);
 884                 l_header_data += opj_bio_numbytes(l_bio);
 885                 opj_bio_destroy(l_bio);
 886
 887                 /* EPH markers */
 888                 if (p_tcp->csty & J2K_CP_CSTY_EPH) {
 889                         if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
 890                                 printf("Error : expected EPH marker\n");
 891                         } else {
 892                                 l_header_data += 2;
 893                         }
 894                 }
 895
 896                 l_header_length = (l_header_data - *l_header_data_start);
 897                 *l_modified_length_ptr -= l_header_length;
 898                 *l_header_data_start += l_header_length;
 899
 900                 /* << INDEX */
 901                 /* End of packet header position. Currently only represents the distance to start of packet
 902                    Will be updated later by incrementing with packet start value */
 903                 if (p_pack_info) {
 904                         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
 905                 }
 906                 /* INDEX >> */
 907
 908                 * p_is_data_present = OPJ_FALSE;
 909                 *p_data_read = l_current_data - p_src_data;
 910                 return OPJ_TRUE;
 911         }
 912
 913         l_band = l_res->bands;
 914         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 915                 opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
 916
 917                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
 918                         ++l_band;
 919                         continue;
 920                 }
 921
 922                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 923                 l_cblk = l_prc->cblks.dec;
 924                 for (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++) {
 925                         OPJ_UINT32 l_included,l_increment, l_segno;
 926                         OPJ_INT32 n;
 927
 928                         /* if cblk not yet included before --> inclusion tagtree */
 929                         if (!l_cblk->numsegs) {
 930                                 l_included = opj_tgt_decode(l_bio, l_prc->incltree, cblkno, p_pi->layno + 1);
 931                                 /* else one bit */
 932                         }
 933                         else {
 934                                 l_included = opj_bio_read(l_bio, 1);
 935                         }
 936
 937                         /* if cblk not included */
 938                         if (!l_included) {
 939                                 l_cblk->numnewpasses = 0;
 940                                 ++l_cblk;
 941                                 continue;
 942                         }
 943
 944                         /* if cblk not yet included --> zero-bitplane tagtree */
 945                         if (!l_cblk->numsegs) {
 946                                 OPJ_UINT32 i = 0;
 947
 948                                 while (!opj_tgt_decode(l_bio, l_prc->imsbtree, cblkno, i)) {
 949                                         ++i;
 950                                 }
 951
 952                                 l_cblk->numbps = l_band->numbps + 1 - i;
 953                                 l_cblk->numlenbits = 3;
 954                         }
 955
 956                         /* number of coding passes */
 957                         l_cblk->numnewpasses = opj_t2_getnumpasses(l_bio);
 958                         l_increment = opj_t2_getcommacode(l_bio);
 959
 960                         /* length indicator increment */
 961                         l_cblk->numlenbits += l_increment;
 962                         l_segno = 0;
 963
 964                         if (!l_cblk->numsegs) {
 965                                 if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1)) {
 966                                         opj_bio_destroy(l_bio);
 967                                         return OPJ_FALSE;
 968                                 }
 969                         }
 970                         else {
 971                                 l_segno = l_cblk->numsegs - 1;
 972                                 if (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses) {
 973                                         ++l_segno;
 974                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 975                                                 opj_bio_destroy(l_bio);
 976                                                 return OPJ_FALSE;
 977                                         }
 978                                 }
 979                         }
 980                         n = l_cblk->numnewpasses;
 981
 982                         do {
 983                                 l_cblk->segs[l_segno].numnewpasses = opj_int_min(l_cblk->segs[l_segno].maxpasses - l_cblk->segs[l_segno].numpasses, n);
 984                                 l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, l_cblk->numlenbits + opj_uint_floorlog2(l_cblk->segs[l_segno].numnewpasses));
 985
 986                                 n -= l_cblk->segs[l_segno].numnewpasses;
 987                                 if (n > 0) {
 988                                         ++l_segno;
 989
 990                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 991                                                 opj_bio_destroy(l_bio);
 992                                                 return OPJ_FALSE;
 993                                         }
 994                                 }
 995                         } while (n > 0);
 996
 997                         ++l_cblk;
 998                 }
 999
1000                 ++l_band;
1001         }
1002
1003         if (!opj_bio_inalign(l_bio)) {
1004                 opj_bio_destroy(l_bio);
1005                 return OPJ_FALSE;
1006         }
1007
1008         l_header_data += opj_bio_numbytes(l_bio);
1009         opj_bio_destroy(l_bio);
1010
1011         /* EPH markers */
1012         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1013                 if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1014                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_ERROR, "Expected EPH marker\n"); */
1015                 } else {
1016                         l_header_data += 2;
1017                 }
1018         }
1019
1020         l_header_length = (l_header_data - *l_header_data_start);
1021         *l_modified_length_ptr -= l_header_length;
1022         *l_header_data_start += l_header_length;
1023
1024         /* << INDEX */
1025         /* End of packet header position. Currently only represents the distance to start of packet
1026          Will be updated later by incrementing with packet start value */
1027         if (p_pack_info) {
1028                 p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1029         }
1030         /* INDEX >> */
1031
1032         *p_is_data_present = OPJ_TRUE;
1033         *p_data_read = l_current_data - p_src_data;
1034
1035         return OPJ_TRUE;
1036 }
1037
1038 OPJ_BOOL opj_t2_read_packet_data(   opj_t2_t* p_t2,
1039                                     opj_tcd_tile_t *p_tile,
1040                                     opj_pi_iterator_t *p_pi,
1041                                     OPJ_BYTE *p_src_data,
1042                                     OPJ_UINT32 * p_data_read,
1043                                     OPJ_UINT32 p_max_length,
1044                                     opj_packet_info_t *pack_info)
1045 {
1046         OPJ_UINT32 bandno, cblkno;
1047         OPJ_UINT32 l_nb_code_blocks;
1048         OPJ_BYTE *l_current_data = p_src_data;
1049         opj_tcd_band_t *l_band = 00;
1050         opj_tcd_cblk_dec_t* l_cblk = 00;
1051         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1052
1053         OPJ_ARG_NOT_USED(p_t2);
1054         OPJ_ARG_NOT_USED(pack_info);
1055
1056         l_band = l_res->bands;
1057         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1058                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1059
1060                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1061                         ++l_band;
1062                         continue;
1063                 }
1064
1065                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1066                 l_cblk = l_prc->cblks.dec;
1067
1068                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1069                         opj_tcd_seg_t *l_seg = 00;
1070
1071                         if (!l_cblk->numnewpasses) {
1072                                 /* nothing to do */
1073                                 ++l_cblk;
1074                                 continue;
1075                         }
1076
1077                         if (!l_cblk->numsegs) {
1078                                 l_seg = l_cblk->segs;
1079                                 ++l_cblk->numsegs;
1080                                 l_cblk->len = 0;
1081                         }
1082                         else {
1083                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1084
1085                                 if (l_seg->numpasses == l_seg->maxpasses) {
1086                                         ++l_seg;
1087                                         ++l_cblk->numsegs;
1088                                 }
1089                         }
1090
1091                         do {
1092                                 if (l_current_data + l_seg->newlen > p_src_data + p_max_length) {
1093                                         return OPJ_FALSE;
1094                                 }
1095
1096 #ifdef USE_JPWL
1097                         /* we need here a j2k handle to verify if making a check to
1098                         the validity of cblocks parameters is selected from user (-W) */
1099
1100                                 /* let's check that we are not exceeding */
1101                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1102                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1103                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1104                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1105                                         if (!JPWL_ASSUME) {
1106                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1107                                                 return OPJ_FALSE;
1108                                         }
1109                                         l_seg->newlen = 8192 - l_cblk->len;
1110                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1111                                         break;
1112                                 };
1113
1114 #endif /* USE_JPWL */
1115
1116                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1117                                         return OPJ_FALSE;
1118                                 }
1119
1120                                 memcpy(l_cblk->data + l_cblk->len, l_current_data, l_seg->newlen);
1121
1122                                 if (l_seg->numpasses == 0) {
1123                                         l_seg->data = &l_cblk->data;
1124                                         l_seg->dataindex = l_cblk->len;
1125                                 }
1126
1127                                 l_current_data += l_seg->newlen;
1128                                 l_seg->numpasses += l_seg->numnewpasses;
1129                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1130
1131                                 l_seg->real_num_passes = l_seg->numpasses;
1132                                 l_cblk->len += l_seg->newlen;
1133                                 l_seg->len += l_seg->newlen;
1134
1135                                 if (l_cblk->numnewpasses > 0) {
1136                                         ++l_seg;
1137                                         ++l_cblk->numsegs;
1138                                 }
1139                         } while (l_cblk->numnewpasses > 0);
1140
1141                         l_cblk->real_num_segs = l_cblk->numsegs;
1142                         ++l_cblk;
1143                 }
1144
1145                 ++l_band;
1146         }
1147
1148         *(p_data_read) = l_current_data - p_src_data;
1149
1150         return OPJ_TRUE;
1151 }
1152
1153 OPJ_BOOL opj_t2_skip_packet_data(   opj_t2_t* p_t2,
1154                                     opj_tcd_tile_t *p_tile,
1155                                     opj_pi_iterator_t *p_pi,
1156                                     OPJ_UINT32 * p_data_read,
1157                                     OPJ_UINT32 p_max_length,
1158                                     opj_packet_info_t *pack_info)
1159 {
1160         OPJ_UINT32 bandno, cblkno;
1161         OPJ_UINT32 l_nb_code_blocks;
1162         opj_tcd_band_t *l_band = 00;
1163         opj_tcd_cblk_dec_t* l_cblk = 00;
1164         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1165
1166         OPJ_ARG_NOT_USED(p_t2);
1167         OPJ_ARG_NOT_USED(pack_info);
1168
1169         *p_data_read = 0;
1170         l_band = l_res->bands;
1171
1172         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1173                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1174
1175                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1176                         ++l_band;
1177                         continue;
1178                 }
1179
1180                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1181                 l_cblk = l_prc->cblks.dec;
1182
1183                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1184                         opj_tcd_seg_t *l_seg = 00;
1185
1186                         if (!l_cblk->numnewpasses) {
1187                                 /* nothing to do */
1188                                 ++l_cblk;
1189                                 continue;
1190                         }
1191
1192                         if (!l_cblk->numsegs) {
1193                                 l_seg = l_cblk->segs;
1194                                 ++l_cblk->numsegs;
1195                                 l_cblk->len = 0;
1196                         }
1197                         else {
1198                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1199
1200                                 if (l_seg->numpasses == l_seg->maxpasses) {
1201                                         ++l_seg;
1202                                         ++l_cblk->numsegs;
1203                                 }
1204                         }
1205
1206                         do {
1207                                 if (* p_data_read + l_seg->newlen > p_max_length) {
1208                                         return OPJ_FALSE;
1209                                 }
1210
1211 #ifdef USE_JPWL
1212                         /* we need here a j2k handle to verify if making a check to
1213                         the validity of cblocks parameters is selected from user (-W) */
1214
1215                                 /* let's check that we are not exceeding */
1216                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1217                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1218                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1219                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1220                                         if (!JPWL_ASSUME) {
1221                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1222                                                 return -999;
1223                                         }
1224                                         l_seg->newlen = 8192 - l_cblk->len;
1225                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1226                                         break;
1227                                 };
1228
1229 #endif /* USE_JPWL */
1230                                 *(p_data_read) += l_seg->newlen;
1231
1232                                 l_seg->numpasses += l_seg->numnewpasses;
1233                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1234                                 if (l_cblk->numnewpasses > 0)
1235                                 {
1236                                         ++l_seg;
1237                                         ++l_cblk->numsegs;
1238                                 }
1239                         } while (l_cblk->numnewpasses > 0);
1240
1241                         ++l_cblk;
1242                 }
1243
1244                 ++l_band;
1245         }
1246
1247         return OPJ_TRUE;
1248 }
1249
1250
1251 OPJ_BOOL opj_t2_init_seg(   opj_tcd_cblk_dec_t* cblk,
1252                             OPJ_UINT32 index,
1253                             OPJ_UINT32 cblksty,
1254                             OPJ_UINT32 first)
1255 {
1256         opj_tcd_seg_t* seg = 00;
1257         OPJ_UINT32 l_nb_segs = index + 1;
1258
1259         if (l_nb_segs > cblk->m_current_max_segs) {
1260                 opj_tcd_seg_t* new_segs;
1261                 cblk->m_current_max_segs += OPJ_J2K_DEFAULT_NB_SEGS;
1262
1263                 new_segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, cblk->m_current_max_segs * sizeof(opj_tcd_seg_t));
1264                 if(! new_segs) {
1265                         opj_free(cblk->segs);
1266                         cblk->segs = NULL;
1267                         cblk->m_current_max_segs = 0;
1268                         /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to initialize segment %d\n", l_nb_segs); */
1269                         return OPJ_FALSE;
1270                 }
1271                 cblk->segs = new_segs;
1272         }
1273
1274         seg = &cblk->segs[index];
1275         memset(seg,0,sizeof(opj_tcd_seg_t));
1276
1277         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1278                 seg->maxpasses = 1;
1279         }
1280         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1281                 if (first) {
1282                         seg->maxpasses = 10;
1283                 } else {
1284                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1285                 }
1286         } else {
1287                 seg->maxpasses = 109;
1288         }
1289
1290         return OPJ_TRUE;
1291 }