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_v2_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_v2_t* t2,
  86                                         opj_tcd_tile_t *tile,
  87                                         opj_tcp_v2_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_v2_t* p_t2,
  95                                     opj_tcd_tile_t *p_tile,
  96                                     opj_tcp_v2_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_v2_t* p_t2,
 104                                             opj_tcd_tile_t *p_tile,
 105                                             opj_tcp_v2_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_v2_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_v2_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_v2_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_v2_t *l_cp = p_t2->cp;
 213         opj_tcp_v2_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_v2_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_v2_t *l_cp = p_t2->cp;
 326         opj_cp_v2_t *cp = p_t2->cp;
 327         opj_tcp_v2_t *l_tcp = &(p_t2->cp->tcps[p_tile_no]);
 328         OPJ_UINT32 l_nb_bytes_read;
 329         OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 330         opj_pi_iterator_t *l_current_pi = 00;
 331         OPJ_UINT32 curtp = 0;
 332         OPJ_UINT32 tp_start_packno;
 333         opj_packet_info_t *l_pack_info = 00;
 334         opj_image_comp_t* l_img_comp = 00;
 335
 336 #ifdef TODO_MSD
 337         if (p_cstr_index) {
 338                 l_pack_info = p_cstr_index->tile_index[p_tile_no].packet;
 339         }
 340 #endif
 341
 342         /* create a packet iterator */
 343         l_pi = opj_pi_create_decode(l_image, l_cp, p_tile_no);
 344         if (!l_pi) {
 345                 return OPJ_FALSE;
 346         }
 347
 348         tp_start_packno = 0;
 349         l_current_pi = l_pi;
 350
 351         for     (pino = 0; pino <= l_tcp->numpocs; ++pino) {
 352
 353                 /* if the resolution needed is to low, one dim of the tilec could be equal to zero
 354                  * and no packets are used to encode this resolution and
 355                  * l_current_pi->resno is always >= p_tile->comps[l_current_pi->compno].minimum_num_resolutions
 356                  * and no l_img_comp->resno_decoded are computed
 357                  */
 358                 opj_bool* first_pass_failed = (opj_bool*)opj_malloc(l_image->numcomps * sizeof(opj_bool));
 359                 memset(first_pass_failed, OPJ_TRUE, l_image->numcomps * sizeof(opj_bool));
 360
 361                 while (opj_pi_next(l_current_pi)) {
 362
 363
 364                         if (l_tcp->num_layers_to_decode > l_current_pi->layno
 365                                         && l_current_pi->resno < p_tile->comps[l_current_pi->compno].minimum_num_resolutions) {
 366                                 l_nb_bytes_read = 0;
 367
 368                                 first_pass_failed[l_current_pi->compno] = OPJ_FALSE;
 369
 370                                 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)) {
 371                                         opj_pi_destroy(l_pi,l_nb_pocs);
 372                                         return OPJ_FALSE;
 373                                 }
 374
 375                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 376                                 l_img_comp->resno_decoded = opj_uint_max(l_current_pi->resno, l_img_comp->resno_decoded);
 377                         }
 378                         else {
 379                                 l_nb_bytes_read = 0;
 380                                 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)) {
 381                                         opj_pi_destroy(l_pi,l_nb_pocs);
 382                                         return OPJ_FALSE;
 383                                 }
 384                         }
 385
 386                         if (first_pass_failed[l_current_pi->compno]) {
 387                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 388                                 if (l_img_comp->resno_decoded == 0)
 389                                         l_img_comp->resno_decoded = p_tile->comps[l_current_pi->compno].minimum_num_resolutions - 1;
 390                         }
 391
 392                         l_current_data += l_nb_bytes_read;
 393                         p_max_len -= l_nb_bytes_read;
 394
 395                         /* INDEX >> */
 396 #ifdef TODO_MSD
 397                         if(p_cstr_info) {
 398                                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 399                                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 400                                 if (!p_cstr_info->packno) {
 401                                         info_PK->start_pos = info_TL->end_header + 1;
 402                                 } 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 */
 403                                         info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno - tp_start_packno; /* Number of packets in previous tile-part */
 404                                         tp_start_packno = p_cstr_info->packno;
 405                                         curtp++;
 406                                         info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header+1;
 407                                 } else {
 408                                         info_PK->start_pos = (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;
 409                                 }
 410                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 411                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance */
 412                                 ++p_cstr_info->packno;
 413                         }
 414 #endif
 415                         /* << INDEX */
 416                 }
 417                 ++l_current_pi;
 418
 419                 opj_free(first_pass_failed);
 420         }
 421         /* INDEX >> */
 422 #ifdef TODO_MSD
 423         if
 424                 (p_cstr_info) {
 425                 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 */
 426         }
 427 #endif
 428         /* << INDEX */
 429
 430         /* don't forget to release pi */
 431         opj_pi_destroy(l_pi,l_nb_pocs);
 432         *p_data_read = l_current_data - p_src;
 433         return OPJ_TRUE;
 434 }
 435
 436 /* ----------------------------------------------------------------------- */
 437
 438 /**
 439  * Creates a Tier 2 handle
 440  *
 441  * @param       p_image         Source or destination image
 442  * @param       p_cp            Image coding parameters.
 443  * @return              a new T2 handle if successful, NULL otherwise.
 444 */
 445 opj_t2_v2_t* opj_t2_create(opj_image_t *p_image, opj_cp_v2_t *p_cp)
 446 {
 447         /* create the t2 structure */
 448         opj_t2_v2_t *l_t2 = (opj_t2_v2_t*)opj_malloc(sizeof(opj_t2_v2_t));
 449         if (!l_t2) {
 450                 return NULL;
 451         }
 452         memset(l_t2,0,sizeof(opj_t2_v2_t));
 453
 454         l_t2->image = p_image;
 455         l_t2->cp = p_cp;
 456
 457         return l_t2;
 458 }
 459
 460 void opj_t2_destroy(opj_t2_v2_t *t2) {
 461         if(t2) {
 462                 opj_free(t2);
 463         }
 464 }
 465
 466 opj_bool opj_t2_decode_packet(  opj_t2_v2_t* p_t2,
 467                                 opj_tcd_tile_t *p_tile,
 468                                 opj_tcp_v2_t *p_tcp,
 469                                 opj_pi_iterator_t *p_pi,
 470                                 OPJ_BYTE *p_src,
 471                                 OPJ_UINT32 * p_data_read,
 472                                 OPJ_UINT32 p_max_length,
 473                                 opj_packet_info_t *p_pack_info)
 474 {
 475         opj_bool l_read_data;
 476         OPJ_UINT32 l_nb_bytes_read = 0;
 477         OPJ_UINT32 l_nb_total_bytes_read = 0;
 478
 479         *p_data_read = 0;
 480
 481         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)) {
 482                 return OPJ_FALSE;
 483         }
 484
 485         p_src += l_nb_bytes_read;
 486         l_nb_total_bytes_read += l_nb_bytes_read;
 487         p_max_length -= l_nb_bytes_read;
 488
 489         /* we should read data for the packet */
 490         if (l_read_data) {
 491                 l_nb_bytes_read = 0;
 492
 493                 if (! opj_t2_read_packet_data(p_t2,p_tile,p_pi,p_src,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 494                         return OPJ_FALSE;
 495                 }
 496
 497                 l_nb_total_bytes_read += l_nb_bytes_read;
 498         }
 499
 500         *p_data_read = l_nb_total_bytes_read;
 501
 502         return OPJ_TRUE;
 503 }
 504
 505 opj_bool opj_t2_encode_packet(  OPJ_UINT32 tileno,
 506                                 opj_tcd_tile_t * tile,
 507                                 opj_tcp_v2_t * tcp,
 508                                 opj_pi_iterator_t *pi,
 509                                 OPJ_BYTE *dest,
 510                                 OPJ_UINT32 * p_data_written,
 511                                 OPJ_UINT32 length,
 512                                 opj_codestream_info_t *cstr_info)
 513 {
 514         OPJ_UINT32 bandno, cblkno;
 515         OPJ_BYTE *c = dest;
 516         OPJ_UINT32 l_nb_bytes;
 517         OPJ_UINT32 compno = pi->compno; /* component value */
 518         OPJ_UINT32 resno  = pi->resno;          /* resolution level value */
 519         OPJ_UINT32 precno = pi->precno; /* precinct value */
 520         OPJ_UINT32 layno  = pi->layno;          /* quality layer value */
 521         OPJ_UINT32 l_nb_blocks;
 522         opj_tcd_band_t *band = 00;
 523         opj_tcd_cblk_enc_t* cblk = 00;
 524         opj_tcd_pass_t *pass = 00;
 525
 526         opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 527         opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 528
 529         opj_bio_t *bio = 00;    /* BIO component */
 530
 531         /* <SOP 0xff91> */
 532         if (tcp->csty & J2K_CP_CSTY_SOP) {
 533                 c[0] = 255;
 534                 c[1] = 145;
 535                 c[2] = 0;
 536                 c[3] = 4;
 537                 c[4] = (tile->packno % 65536) / 256;
 538                 c[5] = (tile->packno % 65536) % 256;
 539                 c += 6;
 540                 length -= 6;
 541         }
 542         /* </SOP> */
 543
 544         if (!layno) {
 545                 band = res->bands;
 546
 547                 for(bandno = 0; bandno < res->numbands; ++bandno) {
 548                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 549
 550                         opj_tgt_reset(prc->incltree);
 551                         opj_tgt_reset(prc->imsbtree);
 552
 553                         l_nb_blocks = prc->cw * prc->ch;
 554                         for     (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 555                                 opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno];
 556
 557                                 cblk->numpasses = 0;
 558                                 opj_tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
 559                         }
 560                         ++band;
 561                 }
 562         }
 563
 564         bio = opj_bio_create();
 565         opj_bio_init_enc(bio, c, length);
 566         opj_bio_write(bio, 1, 1);           /* Empty header bit */
 567
 568         /* Writing Packet header */
 569         band = res->bands;
 570         for (bandno = 0; bandno < res->numbands; ++bandno)      {
 571                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 572
 573                 l_nb_blocks = prc->cw * prc->ch;
 574                 cblk = prc->cblks.enc;
 575
 576                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 577                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 578
 579                         if (!cblk->numpasses && layer->numpasses) {
 580                                 opj_tgt_setvalue(prc->incltree, cblkno, layno);
 581                         }
 582
 583                         ++cblk;
 584                 }
 585
 586                 cblk = prc->cblks.enc;
 587                 for (cblkno = 0; cblkno < l_nb_blocks; cblkno++) {
 588                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 589                         OPJ_UINT32 increment = 0;
 590                         OPJ_UINT32 nump = 0;
 591                         OPJ_UINT32 len = 0, passno;
 592                         OPJ_UINT32 l_nb_passes;
 593
 594                         /* cblk inclusion bits */
 595                         if (!cblk->numpasses) {
 596                                 opj_tgt_encode(bio, prc->incltree, cblkno, layno + 1);
 597                         } else {
 598                                 opj_bio_write(bio, layer->numpasses != 0, 1);
 599                         }
 600
 601                         /* if cblk not included, go to the next cblk  */
 602                         if (!layer->numpasses) {
 603                                 ++cblk;
 604                                 continue;
 605                         }
 606
 607                         /* if first instance of cblk --> zero bit-planes information */
 608                         if (!cblk->numpasses) {
 609                                 cblk->numlenbits = 3;
 610                                 opj_tgt_encode(bio, prc->imsbtree, cblkno, 999);
 611                         }
 612
 613                         /* number of coding passes included */
 614                         opj_t2_putnumpasses(bio, layer->numpasses);
 615                         l_nb_passes = cblk->numpasses + layer->numpasses;
 616                         pass = cblk->passes +  cblk->numpasses;
 617
 618                         /* computation of the increase of the length indicator and insertion in the header     */
 619                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 620                                 ++nump;
 621                                 len += pass->len;
 622
 623                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 624                                         increment = opj_int_max(increment, opj_int_floorlog2(len) + 1 - (cblk->numlenbits + opj_int_floorlog2(nump)));
 625                                         len = 0;
 626                                         nump = 0;
 627                                 }
 628
 629                                 ++pass;
 630                         }
 631                         t2_putcommacode(bio, increment);
 632
 633                         /* computation of the new Length indicator */
 634                         cblk->numlenbits += increment;
 635
 636                         pass = cblk->passes +  cblk->numpasses;
 637                         /* insertion of the codeword segment length */
 638                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 639                                 nump++;
 640                                 len += pass->len;
 641
 642                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 643                                         opj_bio_write(bio, len, cblk->numlenbits + opj_int_floorlog2(nump));
 644                                         len = 0;
 645                                         nump = 0;
 646                                 }
 647                                 ++pass;
 648                         }
 649
 650                         ++cblk;
 651                 }
 652
 653                 ++band;
 654         }
 655
 656         if (!opj_bio_flush(bio)) {
 657                 opj_bio_destroy(bio);
 658                 return OPJ_FALSE;               /* modified to eliminate longjmp !! */
 659         }
 660
 661         l_nb_bytes = opj_bio_numbytes(bio);
 662         c += l_nb_bytes;
 663         length -= l_nb_bytes;
 664
 665         opj_bio_destroy(bio);
 666
 667         /* <EPH 0xff92> */
 668         if (tcp->csty & J2K_CP_CSTY_EPH) {
 669                 c[0] = 255;
 670                 c[1] = 146;
 671                 c += 2;
 672                 length -= 2;
 673         }
 674         /* </EPH> */
 675
 676         /* << INDEX */
 677         /* End of packet header position. Currently only represents the distance to start of packet
 678            Will be updated later by incrementing with packet start value*/
 679         if(cstr_info && cstr_info->index_write) {
 680                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 681                 info_PK->end_ph_pos = (OPJ_INT32)(c - dest);
 682         }
 683         /* INDEX >> */
 684
 685         /* Writing the packet body */
 686         band = res->bands;
 687         for (bandno = 0; bandno < res->numbands; bandno++) {
 688                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 689
 690                 l_nb_blocks = prc->cw * prc->ch;
 691                 cblk = prc->cblks.enc;
 692
 693                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 694                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 695
 696                         if (!layer->numpasses) {
 697                                 ++cblk;
 698                                 continue;
 699                         }
 700
 701                         if (layer->len > length) {
 702                                 return OPJ_FALSE;
 703                         }
 704
 705                         memcpy(c, layer->data, layer->len);
 706                         cblk->numpasses += layer->numpasses;
 707                         c += layer->len;
 708                         length -= layer->len;
 709
 710                         /* << INDEX */
 711                         if(cstr_info && cstr_info->index_write) {
 712                                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 713                                 info_PK->disto += layer->disto;
 714                                 if (cstr_info->D_max < info_PK->disto) {
 715                                         cstr_info->D_max = info_PK->disto;
 716                                 }
 717                         }
 718
 719                         ++cblk;
 720                         /* INDEX >> */
 721                 }
 722                 ++band;
 723         }
 724
 725         * p_data_written += (c - dest);
 726
 727         return OPJ_TRUE;
 728 }
 729
 730 static opj_bool opj_t2_skip_packet( opj_t2_v2_t* p_t2,
 731                                     opj_tcd_tile_t *p_tile,
 732                                     opj_tcp_v2_t *p_tcp,
 733                                     opj_pi_iterator_t *p_pi,
 734                                     OPJ_BYTE *p_src,
 735                                     OPJ_UINT32 * p_data_read,
 736                                     OPJ_UINT32 p_max_length,
 737                                     opj_packet_info_t *p_pack_info)
 738 {
 739         opj_bool l_read_data;
 740         OPJ_UINT32 l_nb_bytes_read = 0;
 741         OPJ_UINT32 l_nb_total_bytes_read = 0;
 742
 743         *p_data_read = 0;
 744
 745         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)) {
 746                 return OPJ_FALSE;
 747         }
 748
 749         p_src += l_nb_bytes_read;
 750         l_nb_total_bytes_read += l_nb_bytes_read;
 751         p_max_length -= l_nb_bytes_read;
 752
 753         /* we should read data for the packet */
 754         if (l_read_data) {
 755                 l_nb_bytes_read = 0;
 756
 757                 if (! opj_t2_skip_packet_data(p_t2,p_tile,p_pi,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 758                         return OPJ_FALSE;
 759                 }
 760
 761                 l_nb_total_bytes_read += l_nb_bytes_read;
 762         }
 763         *p_data_read = l_nb_total_bytes_read;
 764
 765         return OPJ_TRUE;
 766 }
 767
 768
 769
 770 opj_bool opj_t2_read_packet_header( opj_t2_v2_t* p_t2,
 771                                     opj_tcd_tile_t *p_tile,
 772                                     opj_tcp_v2_t *p_tcp,
 773                                     opj_pi_iterator_t *p_pi,
 774                                     opj_bool * p_is_data_present,
 775                                     OPJ_BYTE *p_src_data,
 776                                     OPJ_UINT32 * p_data_read,
 777                                     OPJ_UINT32 p_max_length,
 778                                     opj_packet_info_t *p_pack_info)
 779
 780 {
 781         /* loop */
 782         OPJ_UINT32 bandno, cblkno;
 783         OPJ_UINT32 l_nb_code_blocks;
 784         OPJ_UINT32 l_remaining_length;
 785         OPJ_UINT32 l_header_length;
 786         OPJ_UINT32 * l_modified_length_ptr = 00;
 787         OPJ_BYTE *l_current_data = p_src_data;
 788         opj_cp_v2_t *l_cp = p_t2->cp;
 789         opj_bio_t *l_bio = 00;  /* BIO component */
 790         opj_tcd_band_t *l_band = 00;
 791         opj_tcd_cblk_dec_t* l_cblk = 00;
 792         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
 793
 794         OPJ_BYTE *l_header_data = 00;
 795         OPJ_BYTE **l_header_data_start = 00;
 796
 797         OPJ_UINT32 l_present;
 798
 799         if (p_pi->layno == 0) {
 800                 l_band = l_res->bands;
 801
 802                 /* reset tagtrees */
 803                 for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 804                         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
 805
 806                         if ( ! ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) ) {
 807                                 opj_tgt_reset(l_prc->incltree);
 808                                 opj_tgt_reset(l_prc->imsbtree);
 809                                 l_cblk = l_prc->cblks.dec;
 810
 811                                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 812                                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
 813                                         l_cblk->numsegs = 0;
 814                                         l_cblk->real_num_segs = 0;
 815                                         ++l_cblk;
 816                                 }
 817                         }
 818
 819                         ++l_band;
 820                 }
 821         }
 822
 823         /* SOP markers */
 824
 825         if (p_tcp->csty & J2K_CP_CSTY_SOP) {
 826                 if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
 827                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_WARNING, "Expected SOP marker\n"); */
 828                 } else {
 829                         l_current_data += 6;
 830                 }
 831
 832                 /** TODO : check the Nsop value */
 833         }
 834
 835         /*
 836         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
 837         This part deal with this caracteristic
 838         step 1: Read packet header in the saved structure
 839         step 2: Return to codestream for decoding
 840         */
 841
 842         l_bio = opj_bio_create();
 843         if (! l_bio) {
 844                 return OPJ_FALSE;
 845         }
 846
 847         if (l_cp->ppm == 1) { /* PPM */
 848                 l_header_data_start = &l_cp->ppm_data;
 849                 l_header_data = *l_header_data_start;
 850                 l_modified_length_ptr = &(l_cp->ppm_len);
 851
 852         }
 853         else if (p_tcp->ppt == 1) { /* PPT */
 854                 l_header_data_start = &(p_tcp->ppt_data);
 855                 l_header_data = *l_header_data_start;
 856                 l_modified_length_ptr = &(p_tcp->ppt_len);
 857         }
 858         else {  /* Normal Case */
 859                 l_header_data_start = &(l_current_data);
 860                 l_header_data = *l_header_data_start;
 861                 l_remaining_length = p_src_data+p_max_length-l_header_data;
 862                 l_modified_length_ptr = &(l_remaining_length);
 863         }
 864
 865         opj_bio_init_dec(l_bio, l_header_data,*l_modified_length_ptr);
 866
 867         l_present = opj_bio_read(l_bio, 1);
 868         if (!l_present) {
 869             /* TODO MSD: no test to control the output of this function*/
 870                 opj_bio_inalign(l_bio);
 871                 l_header_data += opj_bio_numbytes(l_bio);
 872                 opj_bio_destroy(l_bio);
 873
 874                 /* EPH markers */
 875                 if (p_tcp->csty & J2K_CP_CSTY_EPH) {
 876                         if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
 877                                 printf("Error : expected EPH marker\n");
 878                         } else {
 879                                 l_header_data += 2;
 880                         }
 881                 }
 882
 883                 l_header_length = (l_header_data - *l_header_data_start);
 884                 *l_modified_length_ptr -= l_header_length;
 885                 *l_header_data_start += l_header_length;
 886
 887                 /* << INDEX */
 888                 /* End of packet header position. Currently only represents the distance to start of packet
 889                    Will be updated later by incrementing with packet start value */
 890                 if (p_pack_info) {
 891                         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
 892                 }
 893                 /* INDEX >> */
 894
 895                 * p_is_data_present = OPJ_FALSE;
 896                 *p_data_read = l_current_data - p_src_data;
 897                 return OPJ_TRUE;
 898         }
 899
 900         l_band = l_res->bands;
 901         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 902                 opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
 903
 904                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
 905                         ++l_band;
 906                         continue;
 907                 }
 908
 909                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 910                 l_cblk = l_prc->cblks.dec;
 911                 for (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++) {
 912                         OPJ_UINT32 l_included,l_increment, l_segno;
 913                         OPJ_INT32 n;
 914
 915                         /* if cblk not yet included before --> inclusion tagtree */
 916                         if (!l_cblk->numsegs) {
 917                                 l_included = opj_tgt_decode(l_bio, l_prc->incltree, cblkno, p_pi->layno + 1);
 918                                 /* else one bit */
 919                         }
 920                         else {
 921                                 l_included = opj_bio_read(l_bio, 1);
 922                         }
 923
 924                         /* if cblk not included */
 925                         if (!l_included) {
 926                                 l_cblk->numnewpasses = 0;
 927                                 ++l_cblk;
 928                                 continue;
 929                         }
 930
 931                         /* if cblk not yet included --> zero-bitplane tagtree */
 932                         if (!l_cblk->numsegs) {
 933                                 OPJ_UINT32 i = 0;
 934
 935                                 while (!opj_tgt_decode(l_bio, l_prc->imsbtree, cblkno, i)) {
 936                                         ++i;
 937                                 }
 938
 939                                 l_cblk->numbps = l_band->numbps + 1 - i;
 940                                 l_cblk->numlenbits = 3;
 941                         }
 942
 943                         /* number of coding passes */
 944                         l_cblk->numnewpasses = opj_t2_getnumpasses(l_bio);
 945                         l_increment = opj_t2_getcommacode(l_bio);
 946
 947                         /* length indicator increment */
 948                         l_cblk->numlenbits += l_increment;
 949                         l_segno = 0;
 950
 951                         if (!l_cblk->numsegs) {
 952                                 if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1)) {
 953                                         opj_bio_destroy(l_bio);
 954                                         return OPJ_FALSE;
 955                                 }
 956                         }
 957                         else {
 958                                 l_segno = l_cblk->numsegs - 1;
 959                                 if (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses) {
 960                                         ++l_segno;
 961                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 962                                                 opj_bio_destroy(l_bio);
 963                                                 return OPJ_FALSE;
 964                                         }
 965                                 }
 966                         }
 967                         n = l_cblk->numnewpasses;
 968
 969                         do {
 970                                 l_cblk->segs[l_segno].numnewpasses = opj_int_min(l_cblk->segs[l_segno].maxpasses - l_cblk->segs[l_segno].numpasses, n);
 971                                 l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, l_cblk->numlenbits + opj_uint_floorlog2(l_cblk->segs[l_segno].numnewpasses));
 972
 973                                 n -= l_cblk->segs[l_segno].numnewpasses;
 974                                 if (n > 0) {
 975                                         ++l_segno;
 976
 977                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 978                                                 opj_bio_destroy(l_bio);
 979                                                 return OPJ_FALSE;
 980                                         }
 981                                 }
 982                         } while (n > 0);
 983
 984                         ++l_cblk;
 985                 }
 986
 987                 ++l_band;
 988         }
 989
 990         if (!opj_bio_inalign(l_bio)) {
 991                 opj_bio_destroy(l_bio);
 992                 return OPJ_FALSE;
 993         }
 994
 995         l_header_data += opj_bio_numbytes(l_bio);
 996         opj_bio_destroy(l_bio);
 997
 998         /* EPH markers */
 999         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1000                 if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1001                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_ERROR, "Expected EPH marker\n"); */
1002                 } else {
1003                         l_header_data += 2;
1004                 }
1005         }
1006
1007         l_header_length = (l_header_data - *l_header_data_start);
1008         *l_modified_length_ptr -= l_header_length;
1009         *l_header_data_start += l_header_length;
1010
1011         /* << INDEX */
1012         /* End of packet header position. Currently only represents the distance to start of packet
1013          Will be updated later by incrementing with packet start value */
1014         if (p_pack_info) {
1015                 p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1016         }
1017         /* INDEX >> */
1018
1019         *p_is_data_present = OPJ_TRUE;
1020         *p_data_read = l_current_data - p_src_data;
1021
1022         return OPJ_TRUE;
1023 }
1024
1025 opj_bool opj_t2_read_packet_data(   opj_t2_v2_t* p_t2,
1026                                     opj_tcd_tile_t *p_tile,
1027                                     opj_pi_iterator_t *p_pi,
1028                                     OPJ_BYTE *p_src_data,
1029                                     OPJ_UINT32 * p_data_read,
1030                                     OPJ_UINT32 p_max_length,
1031                                     opj_packet_info_t *pack_info)
1032 {
1033         OPJ_UINT32 bandno, cblkno;
1034         OPJ_UINT32 l_nb_code_blocks;
1035         OPJ_BYTE *l_current_data = p_src_data;
1036         opj_tcd_band_t *l_band = 00;
1037         opj_tcd_cblk_dec_t* l_cblk = 00;
1038         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1039
1040         l_band = l_res->bands;
1041         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1042                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1043
1044                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1045                         ++l_band;
1046                         continue;
1047                 }
1048
1049                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1050                 l_cblk = l_prc->cblks.dec;
1051
1052                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1053                         opj_tcd_seg_t *l_seg = 00;
1054
1055                         if (!l_cblk->numnewpasses) {
1056                                 /* nothing to do */
1057                                 ++l_cblk;
1058                                 continue;
1059                         }
1060
1061                         if (!l_cblk->numsegs) {
1062                                 l_seg = l_cblk->segs;
1063                                 ++l_cblk->numsegs;
1064                                 l_cblk->len = 0;
1065                         }
1066                         else {
1067                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1068
1069                                 if (l_seg->numpasses == l_seg->maxpasses) {
1070                                         ++l_seg;
1071                                         ++l_cblk->numsegs;
1072                                 }
1073                         }
1074
1075                         do {
1076                                 if (l_current_data + l_seg->newlen > p_src_data + p_max_length) {
1077                                         return OPJ_FALSE;
1078                                 }
1079
1080 #ifdef USE_JPWL
1081                         /* we need here a j2k handle to verify if making a check to
1082                         the validity of cblocks parameters is selected from user (-W) */
1083
1084                                 /* let's check that we are not exceeding */
1085                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1086                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1087                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1088                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1089                                         if (!JPWL_ASSUME) {
1090                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1091                                                 return OPJ_FALSE;
1092                                         }
1093                                         l_seg->newlen = 8192 - l_cblk->len;
1094                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1095                                         break;
1096                                 };
1097
1098 #endif /* USE_JPWL */
1099
1100                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1101                                         return OPJ_FALSE;
1102                                 }
1103
1104                                 memcpy(l_cblk->data + l_cblk->len, l_current_data, l_seg->newlen);
1105
1106                                 if (l_seg->numpasses == 0) {
1107                                         l_seg->data = &l_cblk->data;
1108                                         l_seg->dataindex = l_cblk->len;
1109                                 }
1110
1111                                 l_current_data += l_seg->newlen;
1112                                 l_seg->numpasses += l_seg->numnewpasses;
1113                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1114
1115                                 l_seg->real_num_passes = l_seg->numpasses;
1116                                 l_cblk->len += l_seg->newlen;
1117                                 l_seg->len += l_seg->newlen;
1118
1119                                 if (l_cblk->numnewpasses > 0) {
1120                                         ++l_seg;
1121                                         ++l_cblk->numsegs;
1122                                 }
1123                         } while (l_cblk->numnewpasses > 0);
1124
1125                         l_cblk->real_num_segs = l_cblk->numsegs;
1126                         ++l_cblk;
1127                 }
1128
1129                 ++l_band;
1130         }
1131
1132         *(p_data_read) = l_current_data - p_src_data;
1133
1134         return OPJ_TRUE;
1135 }
1136
1137 opj_bool opj_t2_skip_packet_data(   opj_t2_v2_t* p_t2,
1138                                     opj_tcd_tile_t *p_tile,
1139                                     opj_pi_iterator_t *p_pi,
1140                                     OPJ_UINT32 * p_data_read,
1141                                     OPJ_UINT32 p_max_length,
1142                                     opj_packet_info_t *pack_info)
1143 {
1144         OPJ_UINT32 bandno, cblkno;
1145         OPJ_UINT32 l_nb_code_blocks;
1146         opj_tcd_band_t *l_band = 00;
1147         opj_tcd_cblk_dec_t* l_cblk = 00;
1148         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1149
1150         *p_data_read = 0;
1151         l_band = l_res->bands;
1152
1153         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1154                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1155
1156                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1157                         ++l_band;
1158                         continue;
1159                 }
1160
1161                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1162                 l_cblk = l_prc->cblks.dec;
1163
1164                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1165                         opj_tcd_seg_t *l_seg = 00;
1166
1167                         if (!l_cblk->numnewpasses) {
1168                                 /* nothing to do */
1169                                 ++l_cblk;
1170                                 continue;
1171                         }
1172
1173                         if (!l_cblk->numsegs) {
1174                                 l_seg = l_cblk->segs;
1175                                 ++l_cblk->numsegs;
1176                                 l_cblk->len = 0;
1177                         }
1178                         else {
1179                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1180
1181                                 if (l_seg->numpasses == l_seg->maxpasses) {
1182                                         ++l_seg;
1183                                         ++l_cblk->numsegs;
1184                                 }
1185                         }
1186
1187                         do {
1188                                 if (* p_data_read + l_seg->newlen > p_max_length) {
1189                                         return OPJ_FALSE;
1190                                 }
1191
1192 #ifdef USE_JPWL
1193                         /* we need here a j2k handle to verify if making a check to
1194                         the validity of cblocks parameters is selected from user (-W) */
1195
1196                                 /* let's check that we are not exceeding */
1197                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1198                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1199                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1200                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1201                                         if (!JPWL_ASSUME) {
1202                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1203                                                 return -999;
1204                                         }
1205                                         l_seg->newlen = 8192 - l_cblk->len;
1206                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1207                                         break;
1208                                 };
1209
1210 #endif /* USE_JPWL */
1211                                 *(p_data_read) += l_seg->newlen;
1212
1213                                 l_seg->numpasses += l_seg->numnewpasses;
1214                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1215                                 if (l_cblk->numnewpasses > 0)
1216                                 {
1217                                         ++l_seg;
1218                                         ++l_cblk->numsegs;
1219                                 }
1220                         } while (l_cblk->numnewpasses > 0);
1221
1222                         ++l_cblk;
1223                 }
1224
1225                 ++l_band;
1226         }
1227
1228         return OPJ_TRUE;
1229 }
1230
1231
1232 opj_bool opj_t2_init_seg(   opj_tcd_cblk_dec_t* cblk,
1233                             OPJ_UINT32 index,
1234                             OPJ_UINT32 cblksty,
1235                             OPJ_UINT32 first)
1236 {
1237         opj_tcd_seg_t* seg = 00;
1238         OPJ_UINT32 l_nb_segs = index + 1;
1239
1240         if (l_nb_segs > cblk->m_current_max_segs) {
1241                 opj_tcd_seg_t* new_segs;
1242                 cblk->m_current_max_segs += J2K_DEFAULT_NB_SEGS;
1243
1244                 new_segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, cblk->m_current_max_segs * sizeof(opj_tcd_seg_t));
1245                 if(! new_segs) {
1246                         opj_free(cblk->segs);
1247                         cblk->segs = NULL;
1248                         cblk->m_current_max_segs = 0;
1249                         /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to initialize segment %d\n", l_nb_segs); */
1250                         return OPJ_FALSE;
1251                 }
1252                 cblk->segs = new_segs;
1253         }
1254
1255         seg = &cblk->segs[index];
1256         memset(seg,0,sizeof(opj_tcd_seg_t));
1257
1258         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1259                 seg->maxpasses = 1;
1260         }
1261         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1262                 if (first) {
1263                         seg->maxpasses = 10;
1264                 } else {
1265                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1266                 }
1267         } else {
1268                 seg->maxpasses = 109;
1269         }
1270
1271         return OPJ_TRUE;
1272 }