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 /* see issue 80 */
 315 #if 0
 316 #define JAS_FPRINTF fprintf
 317 #else
 318 /* issue 290 */
 319 static void opj_null_jas_fprintf(FILE* file, const char * format, ...)
 320 {
 321   (void)file;
 322   (void)format;
 323 }
 324 #define JAS_FPRINTF opj_null_jas_fprintf
 325 #endif
 326
 327 OPJ_BOOL opj_t2_decode_packets( opj_t2_t *p_t2,
 328                                 OPJ_UINT32 p_tile_no,
 329                                 opj_tcd_tile_t *p_tile,
 330                                 OPJ_BYTE *p_src,
 331                                 OPJ_UINT32 * p_data_read,
 332                                 OPJ_UINT32 p_max_len,
 333                                 opj_codestream_index_t *p_cstr_index)
 334 {
 335         OPJ_BYTE *l_current_data = p_src;
 336         opj_pi_iterator_t *l_pi = 00;
 337         OPJ_UINT32 pino;
 338         opj_image_t *l_image = p_t2->image;
 339         opj_cp_t *l_cp = p_t2->cp;
 340         opj_tcp_t *l_tcp = &(p_t2->cp->tcps[p_tile_no]);
 341         OPJ_UINT32 l_nb_bytes_read;
 342         OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 343         opj_pi_iterator_t *l_current_pi = 00;
 344 #ifdef TODO_MSD
 345         OPJ_UINT32 curtp = 0;
 346         OPJ_UINT32 tp_start_packno;
 347 #endif
 348         opj_packet_info_t *l_pack_info = 00;
 349         opj_image_comp_t* l_img_comp = 00;
 350
 351         OPJ_ARG_NOT_USED(p_cstr_index);
 352
 353 #ifdef TODO_MSD
 354         if (p_cstr_index) {
 355                 l_pack_info = p_cstr_index->tile_index[p_tile_no].packet;
 356         }
 357 #endif
 358
 359         /* create a packet iterator */
 360         l_pi = opj_pi_create_decode(l_image, l_cp, p_tile_no);
 361         if (!l_pi) {
 362                 return OPJ_FALSE;
 363         }
 364
 365
 366         l_current_pi = l_pi;
 367
 368         for     (pino = 0; pino <= l_tcp->numpocs; ++pino) {
 369
 370                 /* if the resolution needed is too low, one dim of the tilec could be equal to zero
 371                  * and no packets are used to decode this resolution and
 372                  * l_current_pi->resno is always >= p_tile->comps[l_current_pi->compno].minimum_num_resolutions
 373                  * and no l_img_comp->resno_decoded are computed
 374                  */
 375                 OPJ_BOOL* first_pass_failed = (OPJ_BOOL*)opj_malloc(l_image->numcomps * sizeof(OPJ_BOOL));
 376                 if (!first_pass_failed)
 377                 {
 378                     opj_pi_destroy(l_pi,l_nb_pocs);
 379                     return OPJ_FALSE;
 380                 }
 381                 memset(first_pass_failed, OPJ_TRUE, l_image->numcomps * sizeof(OPJ_BOOL));
 382
 383                 while (opj_pi_next(l_current_pi)) {
 384                   JAS_FPRINTF( stderr, "packet offset=00000166 prg=%d cmptno=%02d rlvlno=%02d prcno=%03d lyrno=%02d\n\n",
 385                     l_current_pi->poc.prg1, l_current_pi->compno, l_current_pi->resno, l_current_pi->precno, l_current_pi->layno );
 386
 387                         if (l_tcp->num_layers_to_decode > l_current_pi->layno
 388                                         && l_current_pi->resno < p_tile->comps[l_current_pi->compno].minimum_num_resolutions) {
 389                                 l_nb_bytes_read = 0;
 390
 391                                 first_pass_failed[l_current_pi->compno] = OPJ_FALSE;
 392
 393                                 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)) {
 394                                         opj_pi_destroy(l_pi,l_nb_pocs);
 395                                         opj_free(first_pass_failed);
 396                                         return OPJ_FALSE;
 397                                 }
 398
 399                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 400                                 l_img_comp->resno_decoded = opj_uint_max(l_current_pi->resno, l_img_comp->resno_decoded);
 401                         }
 402                         else {
 403                                 l_nb_bytes_read = 0;
 404                                 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)) {
 405                                         opj_pi_destroy(l_pi,l_nb_pocs);
 406                                         opj_free(first_pass_failed);
 407                                         return OPJ_FALSE;
 408                                 }
 409                         }
 410
 411                         if (first_pass_failed[l_current_pi->compno]) {
 412                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 413                                 if (l_img_comp->resno_decoded == 0)
 414                                         l_img_comp->resno_decoded = p_tile->comps[l_current_pi->compno].minimum_num_resolutions - 1;
 415                         }
 416
 417                         l_current_data += l_nb_bytes_read;
 418                         p_max_len -= l_nb_bytes_read;
 419
 420                         /* INDEX >> */
 421 #ifdef TODO_MSD
 422                         if(p_cstr_info) {
 423                                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 424                                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 425                                 tp_start_packno = 0;
 426                                 if (!p_cstr_info->packno) {
 427                                         info_PK->start_pos = info_TL->end_header + 1;
 428                                 } 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 */
 429                                         info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno - tp_start_packno; /* Number of packets in previous tile-part */
 430                                         tp_start_packno = p_cstr_info->packno;
 431                                         curtp++;
 432                                         info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header+1;
 433                                 } else {
 434                                         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;
 435                                 }
 436                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 437                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  /* End of packet header which now only represents the distance */
 438                                 ++p_cstr_info->packno;
 439                         }
 440 #endif
 441                         /* << INDEX */
 442                 }
 443                 ++l_current_pi;
 444
 445                 opj_free(first_pass_failed);
 446         }
 447         /* INDEX >> */
 448 #ifdef TODO_MSD
 449         if
 450                 (p_cstr_info) {
 451                 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 */
 452         }
 453 #endif
 454         /* << INDEX */
 455
 456         /* don't forget to release pi */
 457         opj_pi_destroy(l_pi,l_nb_pocs);
 458         *p_data_read = (OPJ_UINT32)(l_current_data - p_src);
 459         return OPJ_TRUE;
 460 }
 461
 462 /* ----------------------------------------------------------------------- */
 463
 464 /**
 465  * Creates a Tier 2 handle
 466  *
 467  * @param       p_image         Source or destination image
 468  * @param       p_cp            Image coding parameters.
 469  * @return              a new T2 handle if successful, NULL otherwise.
 470 */
 471 opj_t2_t* opj_t2_create(opj_image_t *p_image, opj_cp_t *p_cp)
 472 {
 473         /* create the t2 structure */
 474         opj_t2_t *l_t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
 475         if (!l_t2) {
 476                 return NULL;
 477         }
 478         memset(l_t2,0,sizeof(opj_t2_t));
 479
 480         l_t2->image = p_image;
 481         l_t2->cp = p_cp;
 482
 483         return l_t2;
 484 }
 485
 486 void opj_t2_destroy(opj_t2_t *t2) {
 487         if(t2) {
 488                 opj_free(t2);
 489         }
 490 }
 491
 492 OPJ_BOOL opj_t2_decode_packet(  opj_t2_t* p_t2,
 493                                 opj_tcd_tile_t *p_tile,
 494                                 opj_tcp_t *p_tcp,
 495                                 opj_pi_iterator_t *p_pi,
 496                                 OPJ_BYTE *p_src,
 497                                 OPJ_UINT32 * p_data_read,
 498                                 OPJ_UINT32 p_max_length,
 499                                 opj_packet_info_t *p_pack_info)
 500 {
 501         OPJ_BOOL l_read_data;
 502         OPJ_UINT32 l_nb_bytes_read = 0;
 503         OPJ_UINT32 l_nb_total_bytes_read = 0;
 504
 505         *p_data_read = 0;
 506
 507         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)) {
 508                 return OPJ_FALSE;
 509         }
 510
 511         p_src += l_nb_bytes_read;
 512         l_nb_total_bytes_read += l_nb_bytes_read;
 513         p_max_length -= l_nb_bytes_read;
 514
 515         /* we should read data for the packet */
 516         if (l_read_data) {
 517                 l_nb_bytes_read = 0;
 518
 519                 if (! opj_t2_read_packet_data(p_t2,p_tile,p_pi,p_src,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 520                         return OPJ_FALSE;
 521                 }
 522
 523                 l_nb_total_bytes_read += l_nb_bytes_read;
 524         }
 525
 526         *p_data_read = l_nb_total_bytes_read;
 527
 528         return OPJ_TRUE;
 529 }
 530
 531 OPJ_BOOL opj_t2_encode_packet(  OPJ_UINT32 tileno,
 532                                 opj_tcd_tile_t * tile,
 533                                 opj_tcp_t * tcp,
 534                                 opj_pi_iterator_t *pi,
 535                                 OPJ_BYTE *dest,
 536                                 OPJ_UINT32 * p_data_written,
 537                                 OPJ_UINT32 length,
 538                                 opj_codestream_info_t *cstr_info)
 539 {
 540         OPJ_UINT32 bandno, cblkno;
 541         OPJ_BYTE* c = dest;
 542         OPJ_UINT32 l_nb_bytes;
 543         OPJ_UINT32 compno = pi->compno;     /* component value */
 544         OPJ_UINT32 resno  = pi->resno;      /* resolution level value */
 545         OPJ_UINT32 precno = pi->precno;     /* precinct value */
 546         OPJ_UINT32 layno  = pi->layno;      /* quality layer value */
 547         OPJ_UINT32 l_nb_blocks;
 548         opj_tcd_band_t *band = 00;
 549         opj_tcd_cblk_enc_t* cblk = 00;
 550         opj_tcd_pass_t *pass = 00;
 551
 552         opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 553         opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 554
 555         opj_bio_t *bio = 00;    /* BIO component */
 556
 557         /* <SOP 0xff91> */
 558         if (tcp->csty & J2K_CP_CSTY_SOP) {
 559                 c[0] = 255;
 560                 c[1] = 145;
 561                 c[2] = 0;
 562                 c[3] = 4;
 563 #if 0
 564                 c[4] = (tile->packno % 65536) / 256;
 565                 c[5] = (tile->packno % 65536) % 256;
 566 #else
 567                 c[4] = (tile->packno >> 8) & 0xff; /* packno is uint32_t */
 568                 c[5] = tile->packno & 0xff;
 569 #endif
 570                 c += 6;
 571                 length -= 6;
 572         }
 573         /* </SOP> */
 574
 575         if (!layno) {
 576                 band = res->bands;
 577
 578                 for(bandno = 0; bandno < res->numbands; ++bandno) {
 579                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 580
 581                         opj_tgt_reset(prc->incltree);
 582                         opj_tgt_reset(prc->imsbtree);
 583
 584                         l_nb_blocks = prc->cw * prc->ch;
 585                         for     (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 586                                 cblk = &prc->cblks.enc[cblkno];
 587
 588                                 cblk->numpasses = 0;
 589                                 opj_tgt_setvalue(prc->imsbtree, cblkno, band->numbps - (OPJ_INT32)cblk->numbps);
 590                         }
 591                         ++band;
 592                 }
 593         }
 594
 595         bio = opj_bio_create();
 596         opj_bio_init_enc(bio, c, length);
 597         opj_bio_write(bio, 1, 1);           /* Empty header bit */
 598
 599         /* Writing Packet header */
 600         band = res->bands;
 601         for (bandno = 0; bandno < res->numbands; ++bandno)      {
 602                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 603
 604                 l_nb_blocks = prc->cw * prc->ch;
 605                 cblk = prc->cblks.enc;
 606
 607                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 608                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 609
 610                         if (!cblk->numpasses && layer->numpasses) {
 611                                 opj_tgt_setvalue(prc->incltree, cblkno, (OPJ_INT32)layno);
 612                         }
 613
 614                         ++cblk;
 615                 }
 616
 617                 cblk = prc->cblks.enc;
 618                 for (cblkno = 0; cblkno < l_nb_blocks; cblkno++) {
 619                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 620                         OPJ_UINT32 increment = 0;
 621                         OPJ_UINT32 nump = 0;
 622                         OPJ_UINT32 len = 0, passno;
 623                         OPJ_UINT32 l_nb_passes;
 624
 625                         /* cblk inclusion bits */
 626                         if (!cblk->numpasses) {
 627                                 opj_tgt_encode(bio, prc->incltree, cblkno, (OPJ_INT32)(layno + 1));
 628                         } else {
 629                                 opj_bio_write(bio, layer->numpasses != 0, 1);
 630                         }
 631
 632                         /* if cblk not included, go to the next cblk  */
 633                         if (!layer->numpasses) {
 634                                 ++cblk;
 635                                 continue;
 636                         }
 637
 638                         /* if first instance of cblk --> zero bit-planes information */
 639                         if (!cblk->numpasses) {
 640                                 cblk->numlenbits = 3;
 641                                 opj_tgt_encode(bio, prc->imsbtree, cblkno, 999);
 642                         }
 643
 644                         /* number of coding passes included */
 645                         opj_t2_putnumpasses(bio, layer->numpasses);
 646                         l_nb_passes = cblk->numpasses + layer->numpasses;
 647                         pass = cblk->passes +  cblk->numpasses;
 648
 649                         /* computation of the increase of the length indicator and insertion in the header     */
 650                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 651                                 ++nump;
 652                                 len += pass->len;
 653
 654                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 655                                   increment = (OPJ_UINT32)opj_int_max((OPJ_INT32)increment, opj_int_floorlog2((OPJ_INT32)len) + 1
 656                                     - ((OPJ_INT32)cblk->numlenbits + opj_int_floorlog2((OPJ_INT32)nump)));
 657                                         len = 0;
 658                                         nump = 0;
 659                                 }
 660
 661                                 ++pass;
 662                         }
 663                         opj_t2_putcommacode(bio, (OPJ_INT32)increment);
 664
 665                         /* computation of the new Length indicator */
 666                         cblk->numlenbits += increment;
 667
 668                         pass = cblk->passes +  cblk->numpasses;
 669                         /* insertion of the codeword segment length */
 670                         for (passno = cblk->numpasses; passno < l_nb_passes; ++passno) {
 671                                 nump++;
 672                                 len += pass->len;
 673
 674                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 675                                         opj_bio_write(bio, (OPJ_UINT32)len, cblk->numlenbits + (OPJ_UINT32)opj_int_floorlog2((OPJ_INT32)nump));
 676                                         len = 0;
 677                                         nump = 0;
 678                                 }
 679                                 ++pass;
 680                         }
 681
 682                         ++cblk;
 683                 }
 684
 685                 ++band;
 686         }
 687
 688         if (!opj_bio_flush(bio)) {
 689                 opj_bio_destroy(bio);
 690                 return OPJ_FALSE;               /* modified to eliminate longjmp !! */
 691         }
 692
 693         l_nb_bytes = (OPJ_UINT32)opj_bio_numbytes(bio);
 694         c += l_nb_bytes;
 695         length -= l_nb_bytes;
 696
 697         opj_bio_destroy(bio);
 698
 699         /* <EPH 0xff92> */
 700         if (tcp->csty & J2K_CP_CSTY_EPH) {
 701                 c[0] = 255;
 702                 c[1] = 146;
 703                 c += 2;
 704                 length -= 2;
 705         }
 706         /* </EPH> */
 707
 708         /* << INDEX */
 709         /* End of packet header position. Currently only represents the distance to start of packet
 710            Will be updated later by incrementing with packet start value*/
 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->end_ph_pos = (OPJ_INT32)(c - dest);
 714         }
 715         /* INDEX >> */
 716
 717         /* Writing the packet body */
 718         band = res->bands;
 719         for (bandno = 0; bandno < res->numbands; bandno++) {
 720                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 721
 722                 l_nb_blocks = prc->cw * prc->ch;
 723                 cblk = prc->cblks.enc;
 724
 725                 for (cblkno = 0; cblkno < l_nb_blocks; ++cblkno) {
 726                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 727
 728                         if (!layer->numpasses) {
 729                                 ++cblk;
 730                                 continue;
 731                         }
 732
 733                         if (layer->len > length) {
 734                                 return OPJ_FALSE;
 735                         }
 736
 737                         memcpy(c, layer->data, layer->len);
 738                         cblk->numpasses += layer->numpasses;
 739                         c += layer->len;
 740                         length -= layer->len;
 741
 742                         /* << INDEX */
 743                         if(cstr_info && cstr_info->index_write) {
 744                                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 745                                 info_PK->disto += layer->disto;
 746                                 if (cstr_info->D_max < info_PK->disto) {
 747                                         cstr_info->D_max = info_PK->disto;
 748                                 }
 749                         }
 750
 751                         ++cblk;
 752                         /* INDEX >> */
 753                 }
 754                 ++band;
 755         }
 756
 757         assert( c >= dest );
 758         * p_data_written += (OPJ_UINT32)(c - dest);
 759
 760         return OPJ_TRUE;
 761 }
 762
 763 static OPJ_BOOL opj_t2_skip_packet( opj_t2_t* p_t2,
 764                                     opj_tcd_tile_t *p_tile,
 765                                     opj_tcp_t *p_tcp,
 766                                     opj_pi_iterator_t *p_pi,
 767                                     OPJ_BYTE *p_src,
 768                                     OPJ_UINT32 * p_data_read,
 769                                     OPJ_UINT32 p_max_length,
 770                                     opj_packet_info_t *p_pack_info)
 771 {
 772         OPJ_BOOL l_read_data;
 773         OPJ_UINT32 l_nb_bytes_read = 0;
 774         OPJ_UINT32 l_nb_total_bytes_read = 0;
 775
 776         *p_data_read = 0;
 777
 778         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)) {
 779                 return OPJ_FALSE;
 780         }
 781
 782         p_src += l_nb_bytes_read;
 783         l_nb_total_bytes_read += l_nb_bytes_read;
 784         p_max_length -= l_nb_bytes_read;
 785
 786         /* we should read data for the packet */
 787         if (l_read_data) {
 788                 l_nb_bytes_read = 0;
 789
 790                 if (! opj_t2_skip_packet_data(p_t2,p_tile,p_pi,&l_nb_bytes_read,p_max_length,p_pack_info)) {
 791                         return OPJ_FALSE;
 792                 }
 793
 794                 l_nb_total_bytes_read += l_nb_bytes_read;
 795         }
 796         *p_data_read = l_nb_total_bytes_read;
 797
 798         return OPJ_TRUE;
 799 }
 800
 801
 802 OPJ_BOOL opj_t2_read_packet_header( opj_t2_t* p_t2,
 803                                     opj_tcd_tile_t *p_tile,
 804                                     opj_tcp_t *p_tcp,
 805                                     opj_pi_iterator_t *p_pi,
 806                                     OPJ_BOOL * p_is_data_present,
 807                                     OPJ_BYTE *p_src_data,
 808                                     OPJ_UINT32 * p_data_read,
 809                                     OPJ_UINT32 p_max_length,
 810                                     opj_packet_info_t *p_pack_info)
 811
 812 {
 813         /* loop */
 814         OPJ_UINT32 bandno, cblkno;
 815         OPJ_UINT32 l_nb_code_blocks;
 816         OPJ_UINT32 l_remaining_length;
 817         OPJ_UINT32 l_header_length;
 818         OPJ_UINT32 * l_modified_length_ptr = 00;
 819         OPJ_BYTE *l_current_data = p_src_data;
 820         opj_cp_t *l_cp = p_t2->cp;
 821         opj_bio_t *l_bio = 00;  /* BIO component */
 822         opj_tcd_band_t *l_band = 00;
 823         opj_tcd_cblk_dec_t* l_cblk = 00;
 824         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
 825
 826         OPJ_BYTE *l_header_data = 00;
 827         OPJ_BYTE **l_header_data_start = 00;
 828
 829         OPJ_UINT32 l_present;
 830
 831         if (p_pi->layno == 0) {
 832                 l_band = l_res->bands;
 833
 834                 /* reset tagtrees */
 835                 for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 836                         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
 837
 838                         if ( ! ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) ) {
 839                                 opj_tgt_reset(l_prc->incltree);
 840                                 opj_tgt_reset(l_prc->imsbtree);
 841                                 l_cblk = l_prc->cblks.dec;
 842
 843                                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 844                                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
 845                                         l_cblk->numsegs = 0;
 846                                         l_cblk->real_num_segs = 0;
 847                                         ++l_cblk;
 848                                 }
 849                         }
 850
 851                         ++l_band;
 852                 }
 853         }
 854
 855         /* SOP markers */
 856
 857         if (p_tcp->csty & J2K_CP_CSTY_SOP) {
 858                 if (p_max_length < 6) {
 859                         /* TODO opj_event_msg(p_t2->cinfo->event_mgr, EVT_WARNING, "Not enough space for expected SOP marker\n"); */
 860                         printf("Not enough space for expected SOP marker\n");
 861                 } else if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
 862                         /* TODO opj_event_msg(p_t2->cinfo->event_mgr, EVT_WARNING, "Expected SOP marker\n"); */
 863                         printf("Expected SOP marker\n");
 864                         fprintf(stderr, "Error : expected SOP marker\n");
 865                 } else {
 866                         l_current_data += 6;
 867                 }
 868
 869                 /** TODO : check the Nsop value */
 870         }
 871
 872         /*
 873         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
 874         This part deal with this caracteristic
 875         step 1: Read packet header in the saved structure
 876         step 2: Return to codestream for decoding
 877         */
 878
 879         l_bio = opj_bio_create();
 880         if (! l_bio) {
 881                 return OPJ_FALSE;
 882         }
 883
 884         if (l_cp->ppm == 1) { /* PPM */
 885                 l_header_data_start = &l_cp->ppm_data;
 886                 l_header_data = *l_header_data_start;
 887                 l_modified_length_ptr = &(l_cp->ppm_len);
 888
 889         }
 890         else if (p_tcp->ppt == 1) { /* PPT */
 891                 l_header_data_start = &(p_tcp->ppt_data);
 892                 l_header_data = *l_header_data_start;
 893                 l_modified_length_ptr = &(p_tcp->ppt_len);
 894         }
 895         else {  /* Normal Case */
 896                 l_header_data_start = &(l_current_data);
 897                 l_header_data = *l_header_data_start;
 898                 l_remaining_length = (OPJ_UINT32)(p_src_data+p_max_length-l_header_data);
 899                 l_modified_length_ptr = &(l_remaining_length);
 900         }
 901
 902         opj_bio_init_dec(l_bio, l_header_data,*l_modified_length_ptr);
 903
 904         l_present = opj_bio_read(l_bio, 1);
 905         JAS_FPRINTF(stderr, "present=%d \n", l_present );
 906         if (!l_present) {
 907             /* TODO MSD: no test to control the output of this function*/
 908                 opj_bio_inalign(l_bio);
 909                 l_header_data += opj_bio_numbytes(l_bio);
 910                 opj_bio_destroy(l_bio);
 911
 912                 /* EPH markers */
 913                 if (p_tcp->csty & J2K_CP_CSTY_EPH) {
 914                         if (p_max_length < 2) {
 915                                 fprintf(stderr, "Not enough space for expected EPH marker\n");
 916                         } else if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
 917                                 fprintf(stderr, "Error : expected EPH marker\n");
 918                         } else {
 919                                 l_header_data += 2;
 920                         }
 921                 }
 922
 923                 l_header_length = (OPJ_UINT32)(l_header_data - *l_header_data_start);
 924                 *l_modified_length_ptr -= l_header_length;
 925                 *l_header_data_start += l_header_length;
 926
 927                 /* << INDEX */
 928                 /* End of packet header position. Currently only represents the distance to start of packet
 929                    Will be updated later by incrementing with packet start value */
 930                 if (p_pack_info) {
 931                         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
 932                 }
 933                 /* INDEX >> */
 934
 935                 * p_is_data_present = OPJ_FALSE;
 936                 *p_data_read = (OPJ_UINT32)(l_current_data - p_src_data);
 937                 return OPJ_TRUE;
 938         }
 939
 940         l_band = l_res->bands;
 941         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
 942                 opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
 943
 944                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
 945                         ++l_band;
 946                         continue;
 947                 }
 948
 949                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
 950                 l_cblk = l_prc->cblks.dec;
 951                 for (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++) {
 952                         OPJ_UINT32 l_included,l_increment, l_segno;
 953                         OPJ_INT32 n;
 954
 955                         /* if cblk not yet included before --> inclusion tagtree */
 956                         if (!l_cblk->numsegs) {
 957                                 l_included = opj_tgt_decode(l_bio, l_prc->incltree, cblkno, (OPJ_INT32)(p_pi->layno + 1));
 958                                 /* else one bit */
 959                         }
 960                         else {
 961                                 l_included = opj_bio_read(l_bio, 1);
 962                         }
 963
 964                         /* if cblk not included */
 965                         if (!l_included) {
 966                                 l_cblk->numnewpasses = 0;
 967                                 ++l_cblk;
 968         JAS_FPRINTF(stderr, "included=%d \n", l_included);
 969                                 continue;
 970                         }
 971
 972                         /* if cblk not yet included --> zero-bitplane tagtree */
 973                         if (!l_cblk->numsegs) {
 974                                 OPJ_UINT32 i = 0;
 975
 976                                 while (!opj_tgt_decode(l_bio, l_prc->imsbtree, cblkno, (OPJ_INT32)i)) {
 977                                         ++i;
 978                                 }
 979
 980                                 l_cblk->numbps = (OPJ_UINT32)l_band->numbps + 1 - i;
 981                                 l_cblk->numlenbits = 3;
 982                         }
 983
 984                         /* number of coding passes */
 985                         l_cblk->numnewpasses = opj_t2_getnumpasses(l_bio);
 986                         l_increment = opj_t2_getcommacode(l_bio);
 987
 988                         /* length indicator increment */
 989                         l_cblk->numlenbits += l_increment;
 990                         l_segno = 0;
 991
 992                         if (!l_cblk->numsegs) {
 993                                 if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1)) {
 994                                         opj_bio_destroy(l_bio);
 995                                         return OPJ_FALSE;
 996                                 }
 997                         }
 998                         else {
 999                                 l_segno = l_cblk->numsegs - 1;
1000                                 if (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses) {
1001                                         ++l_segno;
1002                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
1003                                                 opj_bio_destroy(l_bio);
1004                                                 return OPJ_FALSE;
1005                                         }
1006                                 }
1007                         }
1008                         n = (OPJ_INT32)l_cblk->numnewpasses;
1009
1010                         do {
1011                                 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);
1012                                 l_cblk->segs[l_segno].newlen = opj_bio_read(l_bio, l_cblk->numlenbits + opj_uint_floorlog2(l_cblk->segs[l_segno].numnewpasses));
1013                                         JAS_FPRINTF(stderr, "included=%d numnewpasses=%d increment=%d len=%d \n", l_included, l_cblk->segs[l_segno].numnewpasses, l_increment, l_cblk->segs[l_segno].newlen );
1014
1015                                 n -= (OPJ_INT32)l_cblk->segs[l_segno].numnewpasses;
1016                                 if (n > 0) {
1017                                         ++l_segno;
1018
1019                                         if (! opj_t2_init_seg(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0)) {
1020                                                 opj_bio_destroy(l_bio);
1021                                                 return OPJ_FALSE;
1022                                         }
1023                                 }
1024                         } while (n > 0);
1025
1026                         ++l_cblk;
1027                 }
1028
1029                 ++l_band;
1030         }
1031
1032         if (!opj_bio_inalign(l_bio)) {
1033                 opj_bio_destroy(l_bio);
1034                 return OPJ_FALSE;
1035         }
1036
1037         l_header_data += opj_bio_numbytes(l_bio);
1038         opj_bio_destroy(l_bio);
1039
1040         /* EPH markers */
1041         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1042                 if (p_max_length < 2) {
1043                         fprintf(stderr, "Not enough space for expected EPH marker\n");
1044                 } else if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1045                         /* TODO opj_event_msg(t2->cinfo->event_mgr, EVT_ERROR, "Expected EPH marker\n"); */
1046                         fprintf(stderr, "Error : expected EPH marker\n");
1047                 } else {
1048                         l_header_data += 2;
1049                 }
1050         }
1051
1052         l_header_length = (OPJ_UINT32)(l_header_data - *l_header_data_start);
1053         JAS_FPRINTF( stderr, "hdrlen=%d \n", l_header_length );
1054         JAS_FPRINTF( stderr, "packet body\n");
1055         *l_modified_length_ptr -= l_header_length;
1056         *l_header_data_start += l_header_length;
1057
1058         /* << INDEX */
1059         /* End of packet header position. Currently only represents the distance to start of packet
1060          Will be updated later by incrementing with packet start value */
1061         if (p_pack_info) {
1062                 p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1063         }
1064         /* INDEX >> */
1065
1066         *p_is_data_present = OPJ_TRUE;
1067         *p_data_read = (OPJ_UINT32)(l_current_data - p_src_data);
1068
1069         return OPJ_TRUE;
1070 }
1071
1072 OPJ_BOOL opj_t2_read_packet_data(   opj_t2_t* p_t2,
1073                                     opj_tcd_tile_t *p_tile,
1074                                     opj_pi_iterator_t *p_pi,
1075                                     OPJ_BYTE *p_src_data,
1076                                     OPJ_UINT32 * p_data_read,
1077                                     OPJ_UINT32 p_max_length,
1078                                     opj_packet_info_t *pack_info)
1079 {
1080         OPJ_UINT32 bandno, cblkno;
1081         OPJ_UINT32 l_nb_code_blocks;
1082         OPJ_BYTE *l_current_data = p_src_data;
1083         opj_tcd_band_t *l_band = 00;
1084         opj_tcd_cblk_dec_t* l_cblk = 00;
1085         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1086
1087         OPJ_ARG_NOT_USED(p_t2);
1088         OPJ_ARG_NOT_USED(pack_info);
1089
1090         l_band = l_res->bands;
1091         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1092                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1093
1094                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1095                         ++l_band;
1096                         continue;
1097                 }
1098
1099                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1100                 l_cblk = l_prc->cblks.dec;
1101
1102                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1103                         opj_tcd_seg_t *l_seg = 00;
1104
1105                         if (!l_cblk->numnewpasses) {
1106                                 /* nothing to do */
1107                                 ++l_cblk;
1108                                 continue;
1109                         }
1110
1111                         if (!l_cblk->numsegs) {
1112                                 l_seg = l_cblk->segs;
1113                                 ++l_cblk->numsegs;
1114                                 l_cblk->data_current_size = 0;
1115                         }
1116                         else {
1117                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1118
1119                                 if (l_seg->numpasses == l_seg->maxpasses) {
1120                                         ++l_seg;
1121                                         ++l_cblk->numsegs;
1122                                 }
1123                         }
1124
1125                         do {
1126                                 if (l_current_data + l_seg->newlen > p_src_data + p_max_length) {
1127                                         fprintf(stderr, "read: segment too long (%d) with max (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1128                                                 l_seg->newlen, p_max_length, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1129                                         return OPJ_FALSE;
1130                                 }
1131
1132 #ifdef USE_JPWL
1133                         /* we need here a j2k handle to verify if making a check to
1134                         the validity of cblocks parameters is selected from user (-W) */
1135
1136                                 /* let's check that we are not exceeding */
1137                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1138                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1139                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1140                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1141                                         if (!JPWL_ASSUME) {
1142                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1143                                                 return OPJ_FALSE;
1144                                         }
1145                                         l_seg->newlen = 8192 - l_cblk->len;
1146                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1147                                         break;
1148                                 };
1149
1150 #endif /* USE_JPWL */
1151                                 /* Check if the cblk->data have allocated enough memory */
1152                                 if ((l_cblk->data_current_size + l_seg->newlen) > l_cblk->data_max_size) {
1153                                     OPJ_BYTE* new_cblk_data = (OPJ_BYTE*) opj_realloc(l_cblk->data, l_cblk->data_current_size + l_seg->newlen);
1154                                     if(! new_cblk_data) {
1155                                         opj_free(l_cblk->data);
1156                                         l_cblk->data_max_size = 0;
1157                                         /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to realloc code block cata!\n"); */
1158                                         return OPJ_FALSE;
1159                                     }
1160                                     l_cblk->data_max_size = l_cblk->data_current_size + l_seg->newlen;
1161                                     l_cblk->data = new_cblk_data;
1162                                 }
1163
1164                                 memcpy(l_cblk->data + l_cblk->data_current_size, l_current_data, l_seg->newlen);
1165
1166                                 if (l_seg->numpasses == 0) {
1167                                         l_seg->data = &l_cblk->data;
1168                                         l_seg->dataindex = l_cblk->data_current_size;
1169                                 }
1170
1171                                 l_current_data += l_seg->newlen;
1172                                 l_seg->numpasses += l_seg->numnewpasses;
1173                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1174
1175                                 l_seg->real_num_passes = l_seg->numpasses;
1176                                 l_cblk->data_current_size += l_seg->newlen;
1177                                 l_seg->len += l_seg->newlen;
1178
1179                                 if (l_cblk->numnewpasses > 0) {
1180                                         ++l_seg;
1181                                         ++l_cblk->numsegs;
1182                                 }
1183                         } while (l_cblk->numnewpasses > 0);
1184
1185                         l_cblk->real_num_segs = l_cblk->numsegs;
1186                         ++l_cblk;
1187                 } /* next code_block */
1188
1189                 ++l_band;
1190         }
1191
1192         *(p_data_read) = (OPJ_UINT32)(l_current_data - p_src_data);
1193
1194         return OPJ_TRUE;
1195 }
1196
1197 OPJ_BOOL opj_t2_skip_packet_data(   opj_t2_t* p_t2,
1198                                     opj_tcd_tile_t *p_tile,
1199                                     opj_pi_iterator_t *p_pi,
1200                                     OPJ_UINT32 * p_data_read,
1201                                     OPJ_UINT32 p_max_length,
1202                                     opj_packet_info_t *pack_info)
1203 {
1204         OPJ_UINT32 bandno, cblkno;
1205         OPJ_UINT32 l_nb_code_blocks;
1206         opj_tcd_band_t *l_band = 00;
1207         opj_tcd_cblk_dec_t* l_cblk = 00;
1208         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1209
1210         OPJ_ARG_NOT_USED(p_t2);
1211         OPJ_ARG_NOT_USED(pack_info);
1212
1213         *p_data_read = 0;
1214         l_band = l_res->bands;
1215
1216         for (bandno = 0; bandno < l_res->numbands; ++bandno) {
1217                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1218
1219                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)) {
1220                         ++l_band;
1221                         continue;
1222                 }
1223
1224                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1225                 l_cblk = l_prc->cblks.dec;
1226
1227                 for (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno) {
1228                         opj_tcd_seg_t *l_seg = 00;
1229
1230                         if (!l_cblk->numnewpasses) {
1231                                 /* nothing to do */
1232                                 ++l_cblk;
1233                                 continue;
1234                         }
1235
1236                         if (!l_cblk->numsegs) {
1237                                 l_seg = l_cblk->segs;
1238                                 ++l_cblk->numsegs;
1239                                 l_cblk->data_current_size = 0;
1240                         }
1241                         else {
1242                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1243
1244                                 if (l_seg->numpasses == l_seg->maxpasses) {
1245                                         ++l_seg;
1246                                         ++l_cblk->numsegs;
1247                                 }
1248                         }
1249
1250                         do {
1251                                 if (* p_data_read + l_seg->newlen > p_max_length) {
1252                                         fprintf(stderr, "skip: segment too long (%d) with max (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1253                                                 l_seg->newlen, p_max_length, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1254                                         return OPJ_FALSE;
1255                                 }
1256
1257 #ifdef USE_JPWL
1258                         /* we need here a j2k handle to verify if making a check to
1259                         the validity of cblocks parameters is selected from user (-W) */
1260
1261                                 /* let's check that we are not exceeding */
1262                                 if ((l_cblk->len + l_seg->newlen) > 8192) {
1263                                         opj_event_msg(p_t2->cinfo, EVT_WARNING,
1264                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1265                                                 l_seg->newlen, cblkno, p_pi->precno, bandno, p_pi->resno, p_pi->compno);
1266                                         if (!JPWL_ASSUME) {
1267                                                 opj_event_msg(p_t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1268                                                 return -999;
1269                                         }
1270                                         l_seg->newlen = 8192 - l_cblk->len;
1271                                         opj_event_msg(p_t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", l_seg->newlen);
1272                                         break;
1273                                 };
1274
1275 #endif /* USE_JPWL */
1276                                         JAS_FPRINTF(stderr, "p_data_read (%d) newlen (%d) \n", *p_data_read, l_seg->newlen );
1277                                 *(p_data_read) += l_seg->newlen;
1278
1279                                 l_seg->numpasses += l_seg->numnewpasses;
1280                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1281                                 if (l_cblk->numnewpasses > 0)
1282                                 {
1283                                         ++l_seg;
1284                                         ++l_cblk->numsegs;
1285                                 }
1286                         } while (l_cblk->numnewpasses > 0);
1287
1288                         ++l_cblk;
1289                 }
1290
1291                 ++l_band;
1292         }
1293
1294         return OPJ_TRUE;
1295 }
1296
1297
1298 OPJ_BOOL opj_t2_init_seg(   opj_tcd_cblk_dec_t* cblk,
1299                             OPJ_UINT32 index,
1300                             OPJ_UINT32 cblksty,
1301                             OPJ_UINT32 first)
1302 {
1303         opj_tcd_seg_t* seg = 00;
1304         OPJ_UINT32 l_nb_segs = index + 1;
1305
1306         if (l_nb_segs > cblk->m_current_max_segs) {
1307                 opj_tcd_seg_t* new_segs;
1308                 cblk->m_current_max_segs += OPJ_J2K_DEFAULT_NB_SEGS;
1309
1310                 new_segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, cblk->m_current_max_segs * sizeof(opj_tcd_seg_t));
1311                 if(! new_segs) {
1312                         opj_free(cblk->segs);
1313                         cblk->segs = NULL;
1314                         cblk->m_current_max_segs = 0;
1315                         /* opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to initialize segment %d\n", l_nb_segs); */
1316                         return OPJ_FALSE;
1317                 }
1318                 cblk->segs = new_segs;
1319         }
1320
1321         seg = &cblk->segs[index];
1322         memset(seg,0,sizeof(opj_tcd_seg_t));
1323
1324         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1325                 seg->maxpasses = 1;
1326         }
1327         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1328                 if (first) {
1329                         seg->maxpasses = 10;
1330                 } else {
1331                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1332                 }
1333         } else {
1334                 seg->maxpasses = 109;
1335         }
1336
1337         return OPJ_TRUE;
1338 }