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 opj_t2_putcommacode(opj_bio_t *bio, OPJ_INT32 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 static void opj_t2_putcommacode(opj_bio_t *bio, OPJ_INT32 n) {
 149         while (--n >= 0) {
 150                 opj_bio_write(bio, 1, 1);
 151         }
 152         opj_bio_write(bio, 0, 1);
 153 }
 154
 155 OPJ_UINT32 opj_t2_getcommacode(opj_bio_t *bio)
 156 {
 157     OPJ_UINT32 n = 0;
 158     while (opj_bio_read(bio, 1)) {
 159             ++n;
 160     }
 161     return n;
 162 }
 163
 164 void opj_t2_putnumpasses(opj_bio_t *bio, OPJ_UINT32 n) {
 165         if (n == 1) {
 166                 opj_bio_write(bio, 0, 1);
 167         } else if (n == 2) {
 168                 opj_bio_write(bio, 2, 2);
 169         } else if (n <= 5) {
 170                 opj_bio_write(bio, 0xc | (n - 3), 4);
 171         } else if (n <= 36) {
 172                 opj_bio_write(bio, 0x1e0 | (n - 6), 9);
 173         } else if (n <= 164) {
 174                 opj_bio_write(bio, 0xff80 | (n - 37), 16);
 175         }
 176 }
 177
 178 OPJ_UINT32 opj_t2_getnumpasses(opj_bio_t *bio) {
 179         OPJ_UINT32 n;
 180         if (!opj_bio_read(bio, 1))
 181                 return 1;
 182         if (!opj_bio_read(bio, 1))
 183                 return 2;
 184         if ((n = opj_bio_read(bio, 2)) != 3)
 185                 return (3 + n);
 186         if ((n = opj_bio_read(bio, 5)) != 31)
 187                 return (6 + n);
 188         return (37 + opj_bio_read(bio, 7));
 189 }
 190
 191 /* ----------------------------------------------------------------------- */
 192
 193 OPJ_BOOL opj_t2_encode_packets( opj_t2_t* p_t2,
 194                                 OPJ_UINT32 p_tile_no,
 195                                 opj_tcd_tile_t *p_tile,
 196                                 OPJ_UINT32 p_maxlayers,
 197                                 OPJ_BYTE *p_dest,
 198                                 OPJ_UINT32 * p_data_written,
 199                                 OPJ_UINT32 p_max_len,
 200                                 opj_codestream_info_t *cstr_info,
 201                                 OPJ_UINT32 p_tp_num,
 202                                 OPJ_INT32 p_tp_pos,
 203                                 OPJ_UINT32 p_pino,
 204                                 J2K_T2_MODE p_t2_mode)
 205 {
 206         OPJ_BYTE *l_current_data = p_dest;
 207         OPJ_UINT32 l_nb_bytes = 0;
 208         OPJ_UINT32 compno;
 209         OPJ_UINT32 poc;
 210         opj_pi_iterator_t *l_pi = 00;
 211         opj_pi_iterator_t *l_current_pi = 00;
 212         opj_image_t *l_image = p_t2->image;
 213         opj_cp_t *l_cp = p_t2->cp;
 214         opj_tcp_t *l_tcp = &l_cp->tcps[p_tile_no];
 215         OPJ_UINT32 pocno = l_cp->m_specific_param.m_enc.m_cinema == OPJ_CINEMA4K_24? 2: 1;
 216         OPJ_UINT32 l_max_comp = l_cp->m_specific_param.m_enc.m_max_comp_size > 0 ? l_image->numcomps : 1;
 217         OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 218
 219         l_pi = opj_pi_initialise_encode(l_image, l_cp, p_tile_no, p_t2_mode);
 220         if (!l_pi) {
 221                 return OPJ_FALSE;
 222         }
 223
 224         * p_data_written = 0;
 225
 226         if (p_t2_mode == THRESH_CALC ){ /* Calculating threshold */
 227                 l_current_pi = l_pi;
 228
 229                 for     (compno = 0; compno < l_max_comp; ++compno) {
 230                         OPJ_UINT32 l_comp_len = 0;
 231                         l_current_pi = l_pi;
 232
 233                         for (poc = 0; poc < pocno ; ++poc) {
 234                                 OPJ_UINT32 l_tp_num = compno;
 235
 236                                 /* TODO MSD : check why this function cannot fail (cf. v1) */
 237                                 opj_pi_create_encode(l_pi, l_cp,p_tile_no,poc,l_tp_num,p_tp_pos,p_t2_mode);
 238
 239                                 while (opj_pi_next(l_current_pi)) {
 240                                         if (l_current_pi->layno < p_maxlayers) {
 241                                                 l_nb_bytes = 0;
 242
 243                                                 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)) {
 244                                                         opj_pi_destroy(l_pi, l_nb_pocs);
 245                                                         return OPJ_FALSE;
 246                                                 }
 247
 248                                                 l_comp_len += l_nb_bytes;
 249                                                 l_current_data += l_nb_bytes;
 250                                                 p_max_len -= l_nb_bytes;
 251
 252                                                 * p_data_written += l_nb_bytes;
 253                                         }
 254                                 }
 255
 256                                 if (l_cp->m_specific_param.m_enc.m_max_comp_size) {
 257                                         if (l_comp_len > l_cp->m_specific_param.m_enc.m_max_comp_size) {
 258                                                 opj_pi_destroy(l_pi, l_nb_pocs);
 259                                                 return OPJ_FALSE;
 260                                         }
 261                                 }
 262
 263                                 ++l_current_pi;
 264                         }
 265                 }
 266         }
 267         else {  /* t2_mode == FINAL_PASS  */
 268                 opj_pi_create_encode(l_pi, l_cp,p_tile_no,p_pino,p_tp_num,p_tp_pos,p_t2_mode);
 269
 270                 l_current_pi = &l_pi[p_pino];
 271
 272                 while (opj_pi_next(l_current_pi)) {
 273                         if (l_current_pi->layno < p_maxlayers) {
 274                                 l_nb_bytes=0;
 275
 276                                 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)) {
 277                                         opj_pi_destroy(l_pi, l_nb_pocs);
 278                                         return OPJ_FALSE;
 279                                 }
 280
 281                                 l_current_data += l_nb_bytes;
 282                                 p_max_len -= l_nb_bytes;
 283
 284                                 * p_data_written += l_nb_bytes;
 285
 286                                 /* INDEX >> */
 287                                 if(cstr_info) {
 288                                         if(cstr_info->index_write) {
 289                                                 opj_tile_info_t *info_TL = &cstr_info->tile[p_tile_no];
 290                                                 opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno];
 291                                                 if (!cstr_info->packno) {
 292                                                         info_PK->start_pos = info_TL->end_header + 1;
 293                                                 } else {
 294                                                         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;
 295                                                 }
 296                                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes - 1;
 297                                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance
 298                                                                                                                                                                                                                                                    to start of packet is incremented by value of start of packet*/
 299                                         }
 300
 301                                         cstr_info->packno++;
 302                                 }
 303                                 /* << INDEX */
 304                                 ++p_tile->packno;
 305                         }
 306                 }
 307         }
 308
 309         opj_pi_destroy(l_pi, l_nb_pocs);
 310
 311         return OPJ_TRUE;
 312 }
 313
 314 OPJ_BOOL opj_t2_decode_packets( opj_t2_t *p_t2,
 315                                 OPJ_UINT32 p_tile_no,
 316                                 opj_tcd_tile_t *p_tile,
 317                                 OPJ_BYTE *p_src,
 318                                 OPJ_UINT32 * p_data_read,
 319                                 OPJ_UINT32 p_max_len,
 320                                 opj_codestream_index_t *p_cstr_index)
 321 {
 322         OPJ_BYTE *l_current_data = p_src;
 323         opj_pi_iterator_t *l_pi = 00;
 324         OPJ_UINT32 pino;
 325         opj_image_t *l_image = p_t2->image;
 326         opj_cp_t *l_cp = p_t2->cp;
 327         opj_tcp_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 #ifdef TODO_MSD
 332         OPJ_UINT32 curtp = 0;
 333         OPJ_UINT32 tp_start_packno;
 334 #endif
 335         opj_packet_info_t *l_pack_info = 00;
 336         opj_image_comp_t* l_img_comp = 00;
 337
 338         OPJ_ARG_NOT_USED(p_cstr_index);
 339
 340 #ifdef TODO_MSD
 341         if (p_cstr_index) {
 342                 l_pack_info = p_cstr_index->tile_index[p_tile_no].packet;
 343         }
 344 #endif
 345
 346         /* create a packet iterator */
 347         l_pi = opj_pi_create_decode(l_image, l_cp, p_tile_no);
 348         if (!l_pi) {
 349                 return OPJ_FALSE;
 350         }
 351
 352
 353         l_current_pi = l_pi;
 354
 355         for     (pino = 0; pino <= l_tcp->numpocs; ++pino) {
 356
 357                 /* if the resolution needed is to low, one dim of the tilec could be equal to zero
 358                  * and no packets are used to encode this resolution and
 359                  * l_current_pi->resno is always >= p_tile->comps[l_current_pi->compno].minimum_num_resolutions
 360                  * and no l_img_comp->resno_decoded are computed
 361                  */
 362                 OPJ_BOOL* first_pass_failed = (OPJ_BOOL*)opj_malloc(l_image->numcomps * sizeof(OPJ_BOOL));
 363                 if (!first_pass_failed)
 364                 {
 365                     opj_pi_destroy(l_pi,l_nb_pocs);
 366                     return OPJ_FALSE;
 367                 }
 368                 memset(first_pass_failed, OPJ_TRUE, l_image->numcomps * sizeof(OPJ_BOOL));
 369
 370                 while (opj_pi_next(l_current_pi)) {
 371
 372
 373                         if (l_tcp->num_layers_to_decode > l_current_pi->layno
 374                                         && l_current_pi->resno < p_tile->comps[l_current_pi->compno].minimum_num_resolutions) {
 375                                 l_nb_bytes_read = 0;
 376
 377                                 first_pass_failed[l_current_pi->compno] = OPJ_FALSE;
 378
 379                                 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)) {
 380                                         opj_pi_destroy(l_pi,l_nb_pocs);
 381                                         opj_free(first_pass_failed);
 382                                         return OPJ_FALSE;
 383                                 }
 384
 385                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 386                                 l_img_comp->resno_decoded = opj_uint_max(l_current_pi->resno, l_img_comp->resno_decoded);
 387                         }
 388                         else {
 389                                 l_nb_bytes_read = 0;
 390                                 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)) {
 391                                         opj_pi_destroy(l_pi,l_nb_pocs);
 392                                         opj_free(first_pass_failed);
 393                                         return OPJ_FALSE;
 394                                 }
 395                         }
 396
 397                         if (first_pass_failed[l_current_pi->compno]) {
 398                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 399                                 if (l_img_comp->resno_decoded == 0)
 400                                         l_img_comp->resno_decoded = p_tile->comps[l_current_pi->compno].minimum_num_resolutions - 1;
 401                         }
 402
 403                         l_current_data += l_nb_bytes_read;
 404                         p_max_len -= l_nb_bytes_read;
 405
 406                         /* INDEX >> */
 407 #ifdef TODO_MSD
 408                         if(p_cstr_info) {
 409                                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 410                                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 411                                 tp_start_packno = 0;
 412                                 if (!p_cstr_info->packno) {
 413                                         info_PK->start_pos = info_TL->end_header + 1;
 414                                 } 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 */
 415                                         info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno - tp_start_packno; /* Number of packets in previous tile-part */
 416                                         tp_start_packno = p_cstr_info->packno;
 417                                         curtp++;
 418                                         info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header+1;
 419                                 } else {
 420                                         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;
 421                                 }
 422                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 423                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance */
 424                                 ++p_cstr_info->packno;
 425                         }
 426 #endif
 427                         /* << INDEX */
 428                 }
 429                 ++l_current_pi;
 430
 431                 opj_free(first_pass_failed);
 432         }
 433         /* INDEX >> */
 434 #ifdef TODO_MSD
 435         if
 436                 (p_cstr_info) {
 437                 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 */
 438         }
 439 #endif
 440         /* << INDEX */
 441
 442         /* don't forget to release pi */
 443         opj_pi_destroy(l_pi,l_nb_pocs);
 444         assert( l_current_data - p_src < (ptrdiff_t)UINT32_MAX );
 445         *p_data_read = (OPJ_UINT32)(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 #if 0
 551                 c[4] = (tile->packno % 65536) / 256;
 552                 c[5] = (tile->packno % 65536) % 256;
 553 #else
 554                 c[4] = (tile->packno >> 8) & 0xff; /* packno is uint32_t */
 555                 c[5] = tile->packno & 0xff;
 556 #endif
 557                 c += 6;
 558                 length -= 6;
 559         }
 560         /* </SOP> */
 561
 562         if (!layno) {
 563                 band = res->bands;
 564
 565                 for(bandno = 0; bandno < res->numbands; ++bandno) {
 566                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 567
 568                         opj_tgt_reset(prc->incltree);
 569                         opj_tgt_reset(prc->imsbtree);
 570
 571                         l_nb_blocks = prc->cw * prc->ch;
 572                         for     (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 573                                 cblk = &prc->cblks.enc[cblkno];
 574
 575                                 cblk->numpasses = 0;
 576                                 opj_tgt_setvalue(prc->imsbtree, cblkno, band->numbps - (OPJ_INT32)cblk->numbps);
 577                         }
 578                         ++band;
 579                 }
 580         }
 581
 582         bio = opj_bio_create();
 583         opj_bio_init_enc(bio, c, length);
 584         opj_bio_write(bio, 1, 1);           /* Empty header bit */
 585
 586         /* Writing Packet header */
 587         band = res->bands;
 588         for (bandno = 0; bandno < res->numbands; ++bandno)      {
 589                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 590
 591                 l_nb_blocks = prc->cw * prc->ch;
 592                 cblk = prc->cblks.enc;
 593
 594                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 595                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 596
 597                         if (!cblk->numpasses && layer->numpasses) {
 598                                 opj_tgt_setvalue(prc->incltree, cblkno, (OPJ_INT32)layno);
 599                         }
 600
 601                         ++cblk;
 602                 }
 603
 604                 cblk = prc->cblks.enc;
 605                 for (cblkno = 0; cblkno < l_nb_blocks; cblkno++) {
 606                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 607                         OPJ_UINT32 increment = 0;
 608                         OPJ_UINT32 nump = 0;
 609                         OPJ_UINT32 len = 0, passno;
 610                         OPJ_UINT32 l_nb_passes;
 611
 612                         /* cblk inclusion bits */
 613                         if (!cblk->numpasses) {
 614                                 opj_tgt_encode(bio, prc->incltree, cblkno, (OPJ_INT32)(layno + 1));
 615                         } else {
 616                                 opj_bio_write(bio, layer->numpasses != 0, 1);
 617                         }
 618
 619                         /* if cblk not included, go to the next cblk  */
 620                         if (!layer->numpasses) {
 621                                 ++cblk;
 622                                 continue;
 623                         }
 624
 625                         /* if first instance of cblk --> zero bit-planes information */
 626                         if (!cblk->numpasses) {
 627                                 cblk->numlenbits = 3;
 628                                 opj_tgt_encode(bio, prc->imsbtree, cblkno, 999);
 629                         }
 630
 631                         /* number of coding passes included */
 632                         opj_t2_putnumpasses(bio, layer->numpasses);
 633                         l_nb_passes = cblk->numpasses + layer->numpasses;
 634                         pass = cblk->passes +  cblk->numpasses;
 635
 636                         /* computation of the increase of the length indicator and insertion in the header     */
 637                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 638                                 ++nump;
 639                                 len += pass->len;
 640
 641                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 642                                   increment = (OPJ_UINT32)opj_int_max((OPJ_INT32)increment, opj_int_floorlog2((OPJ_INT32)len) + 1
 643                                     - ((OPJ_INT32)cblk->numlenbits + opj_int_floorlog2((OPJ_INT32)nump)));
 644                                         len = 0;
 645                                         nump = 0;
 646                                 }
 647
 648                                 ++pass;
 649                         }
 650                         opj_t2_putcommacode(bio, (OPJ_INT32)increment);
 651
 652                         /* computation of the new Length indicator */
 653                         cblk->numlenbits += increment;
 654
 655                         pass = cblk->passes +  cblk->numpasses;
 656                         /* insertion of the codeword segment length */
 657                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 658                                 nump++;
 659                                 len += pass->len;
 660
 661                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 662                                         opj_bio_write(bio, (OPJ_UINT32)len, cblk->numlenbits + (OPJ_UINT32)opj_int_floorlog2((OPJ_INT32)nump));
 663                                         len = 0;
 664                                         nump = 0;
 665                                 }
 666                                 ++pass;
 667                         }
 668
 669                         ++cblk;
 670                 }
 671
 672                 ++band;
 673         }
 674
 675         if (!opj_bio_flush(bio)) {
 676                 opj_bio_destroy(bio);
 677                 return OPJ_FALSE;               /* modified to eliminate longjmp !! */
 678         }
 679
 680         l_nb_bytes = (OPJ_UINT32)opj_bio_numbytes(bio);
 681         c += l_nb_bytes;
 682         length -= l_nb_bytes;
 683
 684         opj_bio_destroy(bio);
 685
 686         /* <EPH 0xff92> */
 687         if (tcp->csty & J2K_CP_CSTY_EPH) {
 688                 c[0] = 255;
 689                 c[1] = 146;
 690                 c += 2;
 691                 length -= 2;
 692         }
 693         /* </EPH> */
 694
 695         /* << INDEX */
 696         /* End of packet header position. Currently only represents the distance to start of packet
 697            Will be updated later by incrementing with packet start value*/
 698         if(cstr_info && cstr_info->index_write) {
 699                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 700                 info_PK->end_ph_pos = (OPJ_INT32)(c - dest);
 701         }
 702         /* INDEX >> */
 703
 704         /* Writing the packet body */
 705         band = res->bands;
 706         for (bandno = 0; bandno < res->numbands; bandno++) {
 707                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 708
 709                 l_nb_blocks = prc->cw * prc->ch;
 710                 cblk = prc->cblks.enc;
 711
 712                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 713                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 714
 715                         if (!layer->numpasses) {
 716                                 ++cblk;
 717                                 continue;
 718                         }
 719
 720                         if (layer->len > length) {
 721                                 return OPJ_FALSE;
 722                         }
 723
 724                         memcpy(c, layer->data, layer->len);
 725                         cblk->numpasses += layer->numpasses;
 726                         c += layer->len;
 727                         length -= layer->len;
 728
 729                         /* << INDEX */
 730                         if(cstr_info && cstr_info->index_write) {
 731                                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 732                                 info_PK->disto += layer->disto;
 733                                 if (cstr_info->D_max < info_PK->disto) {
 734                                         cstr_info->D_max = info_PK->disto;
 735                                 }
 736                         }
 737
 738                         ++cblk;
 739                         /* INDEX >> */
 740                 }
 741                 ++band;
 742         }
 743
 744         assert( c >= dest );
 745         * p_data_written += (OPJ_UINT32)(c - dest);
 746
 747         return OPJ_TRUE;
 748 }
 749
 750 static OPJ_BOOL opj_t2_skip_packet( opj_t2_t* p_t2,
 751                                     opj_tcd_tile_t *p_tile,
 752                                     opj_tcp_t *p_tcp,
 753                                     opj_pi_iterator_t *p_pi,
 754                                     OPJ_BYTE *p_src,
 755                                     OPJ_UINT32 * p_data_read,
 756                                     OPJ_UINT32 p_max_length,
 757                                     opj_packet_info_t *p_pack_info)
 758 {
 759         OPJ_BOOL l_read_data;
 760         OPJ_UINT32 l_nb_bytes_read = 0;
 761         OPJ_UINT32 l_nb_total_bytes_read = 0;
 762
 763         *p_data_read = 0;
 764
 765         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)) {
 766                 return OPJ_FALSE;
 767         }
 768
 769         p_src += l_nb_bytes_read;
 770         l_nb_total_bytes_read += l_nb_bytes_read;
 771         p_max_length -= l_nb_bytes_read;
 772
 773         /* we should read data for the packet */
 774         if (l_read_data) {
 775                 l_nb_bytes_read = 0;
 776
 777                 if (! opj_t2_skip_packet_data(p_t2,p_tile,p_pi,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 778                         return OPJ_FALSE;
 779                 }
 780
 781                 l_nb_total_bytes_read += l_nb_bytes_read;
 782         }
 783         *p_data_read = l_nb_total_bytes_read;
 784
 785         return OPJ_TRUE;
 786 }
 787
 788
 789
 790 OPJ_BOOL opj_t2_read_packet_header( opj_t2_t* p_t2,
 791                                     opj_tcd_tile_t *p_tile,
 792                                     opj_tcp_t *p_tcp,
 793                                     opj_pi_iterator_t *p_pi,
 794                                     OPJ_BOOL * p_is_data_present,
 795                                     OPJ_BYTE *p_src_data,
 796                                     OPJ_UINT32 * p_data_read,
 797                                     OPJ_UINT32 p_max_length,
 798                                     opj_packet_info_t *p_pack_info)
 799
 800 {
 801         /* loop */
 802         OPJ_UINT32 bandno, cblkno;
 803         OPJ_UINT32 l_nb_code_blocks;
 804         OPJ_UINT32 l_remaining_length;
 805         OPJ_UINT32 l_header_length;
 806         OPJ_UINT32 * l_modified_length_ptr = 00;
 807         OPJ_BYTE *l_current_data = p_src_data;
 808         opj_cp_t *l_cp = p_t2->cp;
 809         opj_bio_t *l_bio = 00;  /* BIO component */
 810         opj_tcd_band_t *l_band = 00;
 811         opj_tcd_cblk_dec_t* l_cblk = 00;
 812         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
 813
 814         OPJ_BYTE *l_header_data = 00;
 815         OPJ_BYTE **l_header_data_start = 00;
 816
 817         OPJ_UINT32 l_present;
 818
 819         if (p_pi->layno == 0) {
 820                 l_band = l_res->bands;
 821
 822                 /* reset tagtrees */
 823                 for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 824                         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
 825
 826                         if ( ! ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) ) {
 827                                 opj_tgt_reset(l_prc->incltree);
 828                                 opj_tgt_reset(l_prc->imsbtree);
 829                                 l_cblk = l_prc->cblks.dec;
 830
 831                                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 832                                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
 833                                         l_cblk->numsegs = 0;
 834                                         l_cblk->real_num_segs = 0;
 835                                         ++l_cblk;
 836                                 }
 837                         }
 838
 839                         ++l_band;
 840                 }
 841         }
 842
 843         /* SOP markers */
 844
 845         if (p_tcp->csty & J2K_CP_CSTY_SOP) {
 846                 if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
 847                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_WARNING, "Expected SOP marker\n"); */
 848                 } else {
 849                         l_current_data += 6;
 850                 }
 851
 852                 /** TODO : check the Nsop value */
 853         }
 854
 855         /*
 856         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
 857         This part deal with this caracteristic
 858         step 1: Read packet header in the saved structure
 859         step 2: Return to codestream for decoding
 860         */
 861
 862         l_bio = opj_bio_create();
 863         if (! l_bio) {
 864                 return OPJ_FALSE;
 865         }
 866
 867         if (l_cp->ppm == 1) { /* PPM */
 868                 l_header_data_start = &l_cp->ppm_data;
 869                 l_header_data = *l_header_data_start;
 870                 l_modified_length_ptr = &(l_cp->ppm_len);
 871
 872         }
 873         else if (p_tcp->ppt == 1) { /* PPT */
 874                 l_header_data_start = &(p_tcp->ppt_data);
 875                 l_header_data = *l_header_data_start;
 876                 l_modified_length_ptr = &(p_tcp->ppt_len);
 877         }
 878         else {  /* Normal Case */
 879                 l_header_data_start = &(l_current_data);
 880                 l_header_data = *l_header_data_start;
 881                 l_remaining_length = (OPJ_UINT32)(p_src_data+p_max_length-l_header_data);
 882                 l_modified_length_ptr = &(l_remaining_length);
 883         }
 884
 885         opj_bio_init_dec(l_bio, l_header_data,*l_modified_length_ptr);
 886
 887         l_present = opj_bio_read(l_bio, 1);
 888         if (!l_present) {
 889             /* TODO MSD: no test to control the output of this function*/
 890                 opj_bio_inalign(l_bio);
 891                 l_header_data += opj_bio_numbytes(l_bio);
 892                 opj_bio_destroy(l_bio);
 893
 894                 /* EPH markers */
 895                 if (p_tcp->csty & J2K_CP_CSTY_EPH) {
 896                         if (p_max_length < 2) {
 897                                 fprintf(stderr, "Not enough space for expected EPH marker\n");
 898                         } else if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
 899                                 printf("Error : expected EPH marker\n");
 900                         } else {
 901                                 l_header_data += 2;
 902                         }
 903                 }
 904
 905                 l_header_length = (OPJ_UINT32)(l_header_data - *l_header_data_start);
 906                 *l_modified_length_ptr -= l_header_length;
 907                 *l_header_data_start += l_header_length;
 908
 909                 /* << INDEX */
 910                 /* End of packet header position. Currently only represents the distance to start of packet
 911                    Will be updated later by incrementing with packet start value */
 912                 if (p_pack_info) {
 913                         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
 914                 }
 915                 /* INDEX >> */
 916
 917                 * p_is_data_present = OPJ_FALSE;
 918                 *p_data_read = (OPJ_UINT32)(l_current_data - p_src_data);
 919                 return OPJ_TRUE;
 920         }
 921
 922         l_band = l_res->bands;
 923         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 924                 opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
 925
 926                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
 927                         ++l_band;
 928                         continue;
 929                 }
 930
 931                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 932                 l_cblk = l_prc->cblks.dec;
 933                 for (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++) {
 934                         OPJ_UINT32 l_included,l_increment, l_segno;
 935                         OPJ_INT32 n;
 936
 937                         /* if cblk not yet included before --> inclusion tagtree */
 938                         if (!l_cblk->numsegs) {
 939                                 l_included = opj_tgt_decode(l_bio, l_prc->incltree, cblkno, (OPJ_INT32)(p_pi->layno + 1));
 940                                 /* else one bit */
 941                         }
 942                         else {
 943                                 l_included = opj_bio_read(l_bio, 1);
 944                         }
 945
 946                         /* if cblk not included */
 947                         if (!l_included) {
 948                                 l_cblk->numnewpasses = 0;
 949                                 ++l_cblk;
 950                                 continue;
 951                         }
 952
 953                         /* if cblk not yet included --> zero-bitplane tagtree */
 954                         if (!l_cblk->numsegs) {
 955                                 OPJ_UINT32 i = 0;
 956
 957                                 while (!opj_tgt_decode(l_bio, l_prc->imsbtree, cblkno, (OPJ_INT32)i)) {
 958                                         ++i;
 959                                 }
 960
 961                                 l_cblk->numbps = (OPJ_UINT32)l_band->numbps + 1 - i;
 962                                 l_cblk->numlenbits = 3;
 963                         }
 964
 965                         /* number of coding passes */
 966                         l_cblk->numnewpasses = opj_t2_getnumpasses(l_bio);
 967                         l_increment = opj_t2_getcommacode(l_bio);
 968
 969                         /* length indicator increment */
 970                         l_cblk->numlenbits += l_increment;
 971                         l_segno = 0;
 972
 973                         if (!l_cblk->numsegs) {
 974                                 if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1)) {
 975                                         opj_bio_destroy(l_bio);
 976                                         return OPJ_FALSE;
 977                                 }
 978                         }
 979                         else {
 980                                 l_segno = l_cblk->numsegs - 1;
 981                                 if (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses) {
 982                                         ++l_segno;
 983                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
 984                                                 opj_bio_destroy(l_bio);
 985                                                 return OPJ_FALSE;
 986                                         }
 987                                 }
 988                         }
 989                         n = (OPJ_INT32)l_cblk->numnewpasses;
 990
 991                         do {
 992                                 l_cblk->segs[l_segno].numnewpasses = (OPJ_UINT32)opj_int_min((OPJ_INT32)(l_cblk->segs[l_segno].maxpasses - l_cblk->segs[l_segno].numpasses), n);
 993                                 l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, l_cblk->numlenbits + opj_uint_floorlog2(l_cblk->segs[l_segno].numnewpasses));
 994
 995                                 n -= (OPJ_INT32)l_cblk->segs[l_segno].numnewpasses;
 996                                 if (n > 0) {
 997                                         ++l_segno;
 998
 999                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
1000                                                 opj_bio_destroy(l_bio);
1001                                                 return OPJ_FALSE;
1002                                         }
1003                                 }
1004                         } while (n > 0);
1005
1006                         ++l_cblk;
1007                 }
1008
1009                 ++l_band;
1010         }
1011
1012         if (!opj_bio_inalign(l_bio)) {
1013                 opj_bio_destroy(l_bio);
1014                 return OPJ_FALSE;
1015         }
1016
1017         l_header_data += opj_bio_numbytes(l_bio);
1018         opj_bio_destroy(l_bio);
1019
1020         /* EPH markers */
1021         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1022                 if (p_max_length < 2) {
1023                         fprintf(stderr, "Not enough space for expected EPH marker\n");
1024                 } else if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1025                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_ERROR, "Expected EPH marker\n"); */
1026                 } else {
1027                         l_header_data += 2;
1028                 }
1029         }
1030
1031         l_header_length = (OPJ_UINT32)(l_header_data - *l_header_data_start);
1032         *l_modified_length_ptr -= l_header_length;
1033         *l_header_data_start += l_header_length;
1034
1035         /* << INDEX */
1036         /* End of packet header position. Currently only represents the distance to start of packet
1037          Will be updated later by incrementing with packet start value */
1038         if (p_pack_info) {
1039                 p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1040         }
1041         /* INDEX >> */
1042
1043         *p_is_data_present = OPJ_TRUE;
1044         *p_data_read = (OPJ_UINT32)(l_current_data - p_src_data);
1045
1046         return OPJ_TRUE;
1047 }
1048
1049 OPJ_BOOL opj_t2_read_packet_data(   opj_t2_t* p_t2,
1050                                     opj_tcd_tile_t *p_tile,
1051                                     opj_pi_iterator_t *p_pi,
1052                                     OPJ_BYTE *p_src_data,
1053                                     OPJ_UINT32 * p_data_read,
1054                                     OPJ_UINT32 p_max_length,
1055                                     opj_packet_info_t *pack_info)
1056 {
1057         OPJ_UINT32 bandno, cblkno;
1058         OPJ_UINT32 l_nb_code_blocks;
1059         OPJ_BYTE *l_current_data = p_src_data;
1060         opj_tcd_band_t *l_band = 00;
1061         opj_tcd_cblk_dec_t* l_cblk = 00;
1062         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1063
1064         OPJ_ARG_NOT_USED(p_t2);
1065         OPJ_ARG_NOT_USED(pack_info);
1066
1067         l_band = l_res->bands;
1068         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1069                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1070
1071                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1072                         ++l_band;
1073                         continue;
1074                 }
1075
1076                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1077                 l_cblk = l_prc->cblks.dec;
1078
1079                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1080                         opj_tcd_seg_t *l_seg = 00;
1081
1082                         if (!l_cblk->numnewpasses) {
1083                                 /* nothing to do */
1084                                 ++l_cblk;
1085                                 continue;
1086                         }
1087
1088                         if (!l_cblk->numsegs) {
1089                                 l_seg = l_cblk->segs;
1090                                 ++l_cblk->numsegs;
1091                                 l_cblk->data_current_size = 0;
1092                         }
1093                         else {
1094                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1095
1096                                 if (l_seg->numpasses == l_seg->maxpasses) {
1097                                         ++l_seg;
1098                                         ++l_cblk->numsegs;
1099                                 }
1100                         }
1101
1102                         do {
1103                                 if (l_current_data + l_seg->newlen > p_src_data + p_max_length) {
1104                                         return OPJ_FALSE;
1105                                 }
1106
1107 #ifdef USE_JPWL
1108                         /* we need here a j2k handle to verify if making a check to
1109                         the validity of cblocks parameters is selected from user (-W) */
1110
1111                                 /* let's check that we are not exceeding */
1112                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1113                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1114                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1115                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1116                                         if (!JPWL_ASSUME) {
1117                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1118                                                 return OPJ_FALSE;
1119                                         }
1120                                         l_seg->newlen = 8192 - l_cblk->len;
1121                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1122                                         break;
1123                                 };
1124
1125 #endif /* USE_JPWL */
1126                                 /* Check if the cblk->data have allocated enough memory */
1127                                 if ((l_cblk->data_current_size + l_seg->newlen) > l_cblk->data_max_size) {
1128                                     OPJ_BYTE* new_cblk_data = (OPJ_BYTE*) opj_realloc(l_cblk->data, l_cblk->data_current_size + l_seg->newlen);
1129                                     if(! new_cblk_data) {
1130                                         opj_free(l_cblk->data);
1131                                         l_cblk->data_max_size = 0;
1132                                         /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to realloc code block cata!\n"); */
1133                                         return OPJ_FALSE;
1134                                     }
1135                                     l_cblk->data_max_size = l_cblk->data_current_size + l_seg->newlen;
1136                                     l_cblk->data = new_cblk_data;
1137                                 }
1138
1139                                 memcpy(l_cblk->data + l_cblk->data_current_size, l_current_data, l_seg->newlen);
1140
1141                                 if (l_seg->numpasses == 0) {
1142                                         l_seg->data = &l_cblk->data;
1143                                         l_seg->dataindex = l_cblk->data_current_size;
1144                                 }
1145
1146                                 l_current_data += l_seg->newlen;
1147                                 l_seg->numpasses += l_seg->numnewpasses;
1148                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1149
1150                                 l_seg->real_num_passes = l_seg->numpasses;
1151                                 l_cblk->data_current_size += l_seg->newlen;
1152                                 l_seg->len += l_seg->newlen;
1153
1154                                 if (l_cblk->numnewpasses > 0) {
1155                                         ++l_seg;
1156                                         ++l_cblk->numsegs;
1157                                 }
1158                         } while (l_cblk->numnewpasses > 0);
1159
1160                         l_cblk->real_num_segs = l_cblk->numsegs;
1161                         ++l_cblk;
1162                 } /* next code_block */
1163
1164                 ++l_band;
1165         }
1166
1167         *(p_data_read) = (OPJ_UINT32)(l_current_data - p_src_data);
1168
1169         return OPJ_TRUE;
1170 }
1171
1172 OPJ_BOOL opj_t2_skip_packet_data(   opj_t2_t* p_t2,
1173                                     opj_tcd_tile_t *p_tile,
1174                                     opj_pi_iterator_t *p_pi,
1175                                     OPJ_UINT32 * p_data_read,
1176                                     OPJ_UINT32 p_max_length,
1177                                     opj_packet_info_t *pack_info)
1178 {
1179         OPJ_UINT32 bandno, cblkno;
1180         OPJ_UINT32 l_nb_code_blocks;
1181         opj_tcd_band_t *l_band = 00;
1182         opj_tcd_cblk_dec_t* l_cblk = 00;
1183         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1184
1185         OPJ_ARG_NOT_USED(p_t2);
1186         OPJ_ARG_NOT_USED(pack_info);
1187
1188         *p_data_read = 0;
1189         l_band = l_res->bands;
1190
1191         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1192                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1193
1194                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1195                         ++l_band;
1196                         continue;
1197                 }
1198
1199                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1200                 l_cblk = l_prc->cblks.dec;
1201
1202                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1203                         opj_tcd_seg_t *l_seg = 00;
1204
1205                         if (!l_cblk->numnewpasses) {
1206                                 /* nothing to do */
1207                                 ++l_cblk;
1208                                 continue;
1209                         }
1210
1211                         if (!l_cblk->numsegs) {
1212                                 l_seg = l_cblk->segs;
1213                                 ++l_cblk->numsegs;
1214                                 l_cblk->data_current_size = 0;
1215                         }
1216                         else {
1217                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1218
1219                                 if (l_seg->numpasses == l_seg->maxpasses) {
1220                                         ++l_seg;
1221                                         ++l_cblk->numsegs;
1222                                 }
1223                         }
1224
1225                         do {
1226                                 if (* p_data_read + l_seg->newlen > p_max_length) {
1227                                         return OPJ_FALSE;
1228                                 }
1229
1230 #ifdef USE_JPWL
1231                         /* we need here a j2k handle to verify if making a check to
1232                         the validity of cblocks parameters is selected from user (-W) */
1233
1234                                 /* let's check that we are not exceeding */
1235                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1236                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1237                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1238                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1239                                         if (!JPWL_ASSUME) {
1240                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1241                                                 return -999;
1242                                         }
1243                                         l_seg->newlen = 8192 - l_cblk->len;
1244                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1245                                         break;
1246                                 };
1247
1248 #endif /* USE_JPWL */
1249                                 *(p_data_read) += l_seg->newlen;
1250
1251                                 l_seg->numpasses += l_seg->numnewpasses;
1252                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1253                                 if (l_cblk->numnewpasses > 0)
1254                                 {
1255                                         ++l_seg;
1256                                         ++l_cblk->numsegs;
1257                                 }
1258                         } while (l_cblk->numnewpasses > 0);
1259
1260                         ++l_cblk;
1261                 }
1262
1263                 ++l_band;
1264         }
1265
1266         return OPJ_TRUE;
1267 }
1268
1269
1270 OPJ_BOOL opj_t2_init_seg(   opj_tcd_cblk_dec_t* cblk,
1271                             OPJ_UINT32 index,
1272                             OPJ_UINT32 cblksty,
1273                             OPJ_UINT32 first)
1274 {
1275         opj_tcd_seg_t* seg = 00;
1276         OPJ_UINT32 l_nb_segs = index + 1;
1277
1278         if (l_nb_segs > cblk->m_current_max_segs) {
1279                 opj_tcd_seg_t* new_segs;
1280                 cblk->m_current_max_segs += OPJ_J2K_DEFAULT_NB_SEGS;
1281
1282                 new_segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, cblk->m_current_max_segs * sizeof(opj_tcd_seg_t));
1283                 if(! new_segs) {
1284                         opj_free(cblk->segs);
1285                         cblk->segs = NULL;
1286                         cblk->m_current_max_segs = 0;
1287                         /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to initialize segment %d\n", l_nb_segs); */
1288                         return OPJ_FALSE;
1289                 }
1290                 cblk->segs = new_segs;
1291         }
1292
1293         seg = &cblk->segs[index];
1294         memset(seg,0,sizeof(opj_tcd_seg_t));
1295
1296         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1297                 seg->maxpasses = 1;
1298         }
1299         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1300                 if (first) {
1301                         seg->maxpasses = 10;
1302                 } else {
1303                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1304                 }
1305         } else {
1306                 seg->maxpasses = 109;
1307         }
1308
1309         return OPJ_TRUE;
1310 }