libopenjpeg/t2.c

   1 /*
   2  * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
   3  * Copyright (c) 2002-2007, Professor Benoit Macq
   4  * Copyright (c) 2001-2003, David Janssens
   5  * Copyright (c) 2002-2003, Yannick Verschueren
   6  * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
   7  * Copyright (c) 2005, Herve Drolon, FreeImage Team
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "opj_includes.h"
  33
  34 /** @defgroup T2 T2 - Implementation of a tier-2 coding */
  35 /*@{*/
  36
  37 /** @name Local static functions */
  38 /*@{*/
  39
  40 static void t2_putcommacode(opj_bio_t *bio, int n);
  41 static int t2_getcommacode(opj_bio_t *bio);
  42 /**
  43 Variable length code for signalling delta Zil (truncation point)
  44 @param bio Bit Input/Output component
  45 @param n delta Zil
  46 */
  47 static void t2_putnumpasses(opj_bio_t *bio, int n);
  48 static int t2_getnumpasses(opj_bio_t *bio);
  49 /**
  50 Encode a packet of a tile to a destination buffer
  51 @param tile Tile for which to write the packets
  52 @param tcp Tile coding parameters
  53 @param pi Packet identity
  54 @param dest Destination buffer
  55 @param len Length of the destination buffer
  56 @param cstr_info Codestream information structure
  57 @param tileno Number of the tile encoded
  58 @return
  59 */
  60 static int t2_encode_packet(opj_tcd_tile_t *tile, opj_tcp_t *tcp, opj_pi_iterator_t *pi, unsigned char *dest, int len, opj_codestream_info_t *cstr_info, int tileno);
  61 /**
  62 @param cblk
  63 @param index
  64 @param cblksty
  65 @param first
  66 */
  67 static void t2_init_seg(opj_tcd_cblk_dec_t* cblk, int index, int cblksty, int first);
  68 /**
  69 Decode a packet of a tile from a source buffer
  70 @param t2 T2 handle
  71 @param src Source buffer
  72 @param len Length of the source buffer
  73 @param tile Tile for which to write the packets
  74 @param tcp Tile coding parameters
  75 @param pi Packet identity
  76 @param pack_info Packet information
  77 @return
  78 */
  79 static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile,
  80                                                                                                                 opj_tcp_t *tcp, opj_pi_iterator_t *pi, opj_packet_info_t *pack_info);
  81
  82
  83 /**
  84 Decode a packet of a tile from a source buffer
  85 @param t2 T2 handle
  86 @param src Source buffer
  87 @param len Length of the source buffer
  88 @param tile Tile for which to write the packets
  89 @param tcp Tile coding parameters
  90 @param pi Packet identity
  91 @return
  92 */
  93 static opj_bool t2_decode_packet_v2(
  94                                                          opj_t2_v2_t* p_t2,
  95                                                          opj_tcd_tile_t *p_tile,
  96                              opj_tcp_v2_t *p_tcp,
  97                                                          opj_pi_iterator_t *p_pi,
  98                                                          OPJ_BYTE *p_src,
  99                                                          OPJ_UINT32 * p_data_read,
 100                                                          OPJ_UINT32 p_max_length,
 101                                                          opj_packet_info_t *p_pack_info);
 102
 103 static opj_bool t2_skip_packet(
 104                                                          opj_t2_v2_t* p_t2,
 105                                                          opj_tcd_tile_t *p_tile,
 106                              opj_tcp_v2_t *p_tcp,
 107                                                          opj_pi_iterator_t *p_pi,
 108                                                          OPJ_BYTE *p_src,
 109                                                          OPJ_UINT32 * p_data_read,
 110                                                          OPJ_UINT32 p_max_length,
 111                                                          opj_packet_info_t *p_pack_info);
 112
 113 static opj_bool t2_read_packet_header(
 114                                                          opj_t2_v2_t* p_t2,
 115                                                          opj_tcd_tile_t *p_tile,
 116                              opj_tcp_v2_t *p_tcp,
 117                                                          opj_pi_iterator_t *p_pi,
 118                                                          opj_bool * p_is_data_present,
 119                                                          OPJ_BYTE *p_src_data,
 120                                                          OPJ_UINT32 * p_data_read,
 121                                                          OPJ_UINT32 p_max_length,
 122                                                          opj_packet_info_t *p_pack_info);
 123
 124 static opj_bool t2_read_packet_data(
 125                                                          opj_t2_v2_t* p_t2,
 126                                                          opj_tcd_tile_t *p_tile,
 127                                                          opj_pi_iterator_t *p_pi,
 128                                                          OPJ_BYTE *p_src_data,
 129                                                          OPJ_UINT32 * p_data_read,
 130                                                          OPJ_UINT32 p_max_length,
 131                                                          opj_packet_info_t *pack_info);
 132
 133 static opj_bool t2_skip_packet_data(
 134                                                          opj_t2_v2_t* p_t2,
 135                                                          opj_tcd_tile_t *p_tile,
 136                                                          opj_pi_iterator_t *p_pi,
 137                                                          OPJ_UINT32 * p_data_read,
 138                                                          OPJ_UINT32 p_max_length,
 139                                                          opj_packet_info_t *pack_info);
 140
 141 /**
 142 @param seg
 143 @param cblksty
 144 @param first
 145 */
 146 static opj_bool t2_init_seg_v2(opj_tcd_cblk_dec_t* cblk, OPJ_UINT32 index, OPJ_UINT32 cblksty, OPJ_UINT32 first);
 147
 148 /*@}*/
 149
 150 /*@}*/
 151
 152 /* ----------------------------------------------------------------------- */
 153
 154 /* #define RESTART 0x04 */
 155
 156 static void t2_putcommacode(opj_bio_t *bio, int n) {
 157         while (--n >= 0) {
 158                 bio_write(bio, 1, 1);
 159         }
 160         bio_write(bio, 0, 1);
 161 }
 162
 163 static int t2_getcommacode(opj_bio_t *bio) {
 164         int n;
 165         for (n = 0; bio_read(bio, 1); n++) {
 166                 ;
 167         }
 168         return n;
 169 }
 170
 171 static void t2_putnumpasses(opj_bio_t *bio, int n) {
 172         if (n == 1) {
 173                 bio_write(bio, 0, 1);
 174         } else if (n == 2) {
 175                 bio_write(bio, 2, 2);
 176         } else if (n <= 5) {
 177                 bio_write(bio, 0xc | (n - 3), 4);
 178         } else if (n <= 36) {
 179                 bio_write(bio, 0x1e0 | (n - 6), 9);
 180         } else if (n <= 164) {
 181                 bio_write(bio, 0xff80 | (n - 37), 16);
 182         }
 183 }
 184
 185 static int t2_getnumpasses(opj_bio_t *bio) {
 186         int n;
 187         if (!bio_read(bio, 1))
 188                 return 1;
 189         if (!bio_read(bio, 1))
 190                 return 2;
 191         if ((n = bio_read(bio, 2)) != 3)
 192                 return (3 + n);
 193         if ((n = bio_read(bio, 5)) != 31)
 194                 return (6 + n);
 195         return (37 + bio_read(bio, 7));
 196 }
 197
 198 static int t2_encode_packet(opj_tcd_tile_t * tile, opj_tcp_t * tcp, opj_pi_iterator_t *pi, unsigned char *dest, int length, opj_codestream_info_t *cstr_info, int tileno) {
 199         int bandno, cblkno;
 200         unsigned char *c = dest;
 201
 202         int compno = pi->compno;        /* component value */
 203         int resno  = pi->resno;         /* resolution level value */
 204         int precno = pi->precno;        /* precinct value */
 205         int layno  = pi->layno;         /* quality layer value */
 206
 207         opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
 208         opj_tcd_resolution_t *res = &tilec->resolutions[resno];
 209
 210         opj_bio_t *bio = NULL;  /* BIO component */
 211
 212         /* <SOP 0xff91> */
 213         if (tcp->csty & J2K_CP_CSTY_SOP) {
 214                 c[0] = 255;
 215                 c[1] = 145;
 216                 c[2] = 0;
 217                 c[3] = 4;
 218                 c[4] = (unsigned char)((tile->packno % 65536) / 256);
 219                 c[5] = (unsigned char)((tile->packno % 65536) % 256);
 220                 c += 6;
 221         }
 222         /* </SOP> */
 223
 224         if (!layno) {
 225                 for (bandno = 0; bandno < res->numbands; bandno++) {
 226                         opj_tcd_band_t *band = &res->bands[bandno];
 227                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 228                         tgt_reset(prc->incltree);
 229                         tgt_reset(prc->imsbtree);
 230                         for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 231                                 opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno];
 232                                 cblk->numpasses = 0;
 233                                 tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
 234                         }
 235                 }
 236         }
 237
 238         bio = bio_create();
 239         bio_init_enc(bio, c, length);
 240         bio_write(bio, 1, 1);           /* Empty header bit */
 241
 242         /* Writing Packet header */
 243         for (bandno = 0; bandno < res->numbands; bandno++) {
 244                 opj_tcd_band_t *band = &res->bands[bandno];
 245                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 246                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 247                         opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno];
 248                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 249                         if (!cblk->numpasses && layer->numpasses) {
 250                                 tgt_setvalue(prc->incltree, cblkno, layno);
 251                         }
 252                 }
 253                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 254                         opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno];
 255                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 256                         int increment = 0;
 257                         int nump = 0;
 258                         int len = 0, passno;
 259                         /* cblk inclusion bits */
 260                         if (!cblk->numpasses) {
 261                                 tgt_encode(bio, prc->incltree, cblkno, layno + 1);
 262                         } else {
 263                                 bio_write(bio, layer->numpasses != 0, 1);
 264                         }
 265                         /* if cblk not included, go to the next cblk  */
 266                         if (!layer->numpasses) {
 267                                 continue;
 268                         }
 269                         /* if first instance of cblk --> zero bit-planes information */
 270                         if (!cblk->numpasses) {
 271                                 cblk->numlenbits = 3;
 272                                 tgt_encode(bio, prc->imsbtree, cblkno, 999);
 273                         }
 274                         /* number of coding passes included */
 275                         t2_putnumpasses(bio, layer->numpasses);
 276
 277                         /* computation of the increase of the length indicator and insertion in the header     */
 278                         for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) {
 279                                 opj_tcd_pass_t *pass = &cblk->passes[passno];
 280                                 nump++;
 281                                 len += pass->len;
 282                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 283                                         increment = int_max(increment, int_floorlog2(len) + 1 - (cblk->numlenbits + int_floorlog2(nump)));
 284                                         len = 0;
 285                                         nump = 0;
 286                                 }
 287                         }
 288                         t2_putcommacode(bio, increment);
 289
 290                         /* computation of the new Length indicator */
 291                         cblk->numlenbits += increment;
 292
 293                         /* insertion of the codeword segment length */
 294                         for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) {
 295                                 opj_tcd_pass_t *pass = &cblk->passes[passno];
 296                                 nump++;
 297                                 len += pass->len;
 298                                 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
 299                                         bio_write(bio, len, cblk->numlenbits + int_floorlog2(nump));
 300                                         len = 0;
 301                                         nump = 0;
 302                                 }
 303                         }
 304                 }
 305         }
 306
 307         if (bio_flush(bio)) {
 308                 bio_destroy(bio);
 309                 return -999;            /* modified to eliminate longjmp !! */
 310         }
 311
 312         c += bio_numbytes(bio);
 313         bio_destroy(bio);
 314
 315         /* <EPH 0xff92> */
 316         if (tcp->csty & J2K_CP_CSTY_EPH) {
 317                 c[0] = 255;
 318                 c[1] = 146;
 319                 c += 2;
 320         }
 321         /* </EPH> */
 322
 323         /* << INDEX */
 324         // End of packet header position. Currently only represents the distance to start of packet
 325         // Will be updated later by incrementing with packet start value
 326         if(cstr_info && cstr_info->index_write) {
 327                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 328                 info_PK->end_ph_pos = (int)(c - dest);
 329         }
 330         /* INDEX >> */
 331
 332         /* Writing the packet body */
 333
 334         for (bandno = 0; bandno < res->numbands; bandno++) {
 335                 opj_tcd_band_t *band = &res->bands[bandno];
 336                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 337                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 338                         opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno];
 339                         opj_tcd_layer_t *layer = &cblk->layers[layno];
 340                         if (!layer->numpasses) {
 341                                 continue;
 342                         }
 343                         if (c + layer->len > dest + length) {
 344                                 return -999;
 345                         }
 346
 347                         memcpy(c, layer->data, layer->len);
 348                         cblk->numpasses += layer->numpasses;
 349                         c += layer->len;
 350                         /* << INDEX */
 351                         if(cstr_info && cstr_info->index_write) {
 352                                 opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
 353                                 info_PK->disto += layer->disto;
 354                                 if (cstr_info->D_max < info_PK->disto) {
 355                                         cstr_info->D_max = info_PK->disto;
 356                                 }
 357                         }
 358                         /* INDEX >> */
 359                 }
 360         }
 361
 362         return (c - dest);
 363 }
 364
 365 static void t2_init_seg(opj_tcd_cblk_dec_t* cblk, int index, int cblksty, int first) {
 366         opj_tcd_seg_t* seg;
 367         cblk->segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, (index + 1) * sizeof(opj_tcd_seg_t));
 368         seg = &cblk->segs[index];
 369         seg->data = NULL;
 370         seg->dataindex = 0;
 371         seg->numpasses = 0;
 372         seg->len = 0;
 373         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
 374                 seg->maxpasses = 1;
 375         }
 376         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
 377                 if (first) {
 378                         seg->maxpasses = 10;
 379                 } else {
 380                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
 381                 }
 382         } else {
 383                 seg->maxpasses = 109;
 384         }
 385 }
 386
 387 static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile,
 388                                                                                                                 opj_tcp_t *tcp, opj_pi_iterator_t *pi, opj_packet_info_t *pack_info) {
 389         int bandno, cblkno;
 390         unsigned char *c = src;
 391
 392         opj_cp_t *cp = t2->cp;
 393
 394         int compno = pi->compno;        /* component value */
 395         int resno  = pi->resno;         /* resolution level value */
 396         int precno = pi->precno;        /* precinct value */
 397         int layno  = pi->layno;         /* quality layer value */
 398
 399         opj_tcd_resolution_t* res = &tile->comps[compno].resolutions[resno];
 400
 401         unsigned char *hd = NULL;
 402         int present;
 403
 404         opj_bio_t *bio = NULL;  /* BIO component */
 405
 406         if (layno == 0) {
 407                 for (bandno = 0; bandno < res->numbands; bandno++) {
 408                         opj_tcd_band_t *band = &res->bands[bandno];
 409                         opj_tcd_precinct_t *prc = &band->precincts[precno];
 410
 411                         if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
 412
 413                         tgt_reset(prc->incltree);
 414                         tgt_reset(prc->imsbtree);
 415                         for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 416                                 opj_tcd_cblk_dec_t* cblk = &prc->cblks.dec[cblkno];
 417                                 cblk->numsegs = 0;
 418                         }
 419                 }
 420         }
 421
 422         /* SOP markers */
 423
 424         if (tcp->csty & J2K_CP_CSTY_SOP) {
 425                 if ((*c) != 0xff || (*(c + 1) != 0x91)) {
 426                         opj_event_msg(t2->cinfo, EVT_WARNING, "Expected SOP marker\n");
 427                 } else {
 428                         c += 6;
 429                 }
 430
 431                 /** TODO : check the Nsop value */
 432         }
 433
 434         /*
 435         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
 436         This part deal with this caracteristic
 437         step 1: Read packet header in the saved structure
 438         step 2: Return to codestream for decoding
 439         */
 440
 441         bio = bio_create();
 442
 443         if (cp->ppm == 1) {             /* PPM */
 444                 hd = cp->ppm_data;
 445                 bio_init_dec(bio, hd, cp->ppm_len);
 446         } else if (tcp->ppt == 1) {     /* PPT */
 447                 hd = tcp->ppt_data;
 448                 bio_init_dec(bio, hd, tcp->ppt_len);
 449         } else {                        /* Normal Case */
 450                 hd = c;
 451                 bio_init_dec(bio, hd, src+len-hd);
 452         }
 453
 454         present = bio_read(bio, 1);
 455
 456         if (!present) {
 457                 bio_inalign(bio);
 458                 hd += bio_numbytes(bio);
 459                 bio_destroy(bio);
 460
 461                 /* EPH markers */
 462
 463                 if (tcp->csty & J2K_CP_CSTY_EPH) {
 464                         if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
 465                                 printf("Error : expected EPH marker\n");
 466                         } else {
 467                                 hd += 2;
 468                         }
 469                 }
 470
 471                 /* << INDEX */
 472                 // End of packet header position. Currently only represents the distance to start of packet
 473                 // Will be updated later by incrementing with packet start value
 474                 if(pack_info) {
 475                         pack_info->end_ph_pos = (int)(c - src);
 476                 }
 477                 /* INDEX >> */
 478
 479                 if (cp->ppm == 1) {             /* PPM case */
 480                         cp->ppm_len += cp->ppm_data-hd;
 481                         cp->ppm_data = hd;
 482                         return (c - src);
 483                 }
 484                 if (tcp->ppt == 1) {    /* PPT case */
 485                         tcp->ppt_len+=tcp->ppt_data-hd;
 486                         tcp->ppt_data = hd;
 487                         return (c - src);
 488                 }
 489
 490                 return (hd - src);
 491         }
 492
 493         for (bandno = 0; bandno < res->numbands; bandno++) {
 494                 opj_tcd_band_t *band = &res->bands[bandno];
 495                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 496
 497                 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
 498
 499                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 500                         int included, increment, n, segno;
 501                         opj_tcd_cblk_dec_t* cblk = &prc->cblks.dec[cblkno];
 502                         /* if cblk not yet included before --> inclusion tagtree */
 503                         if (!cblk->numsegs) {
 504                                 included = tgt_decode(bio, prc->incltree, cblkno, layno + 1);
 505                                 /* else one bit */
 506                         } else {
 507                                 included = bio_read(bio, 1);
 508                         }
 509                         /* if cblk not included */
 510                         if (!included) {
 511                                 cblk->numnewpasses = 0;
 512                                 continue;
 513                         }
 514                         /* if cblk not yet included --> zero-bitplane tagtree */
 515                         if (!cblk->numsegs) {
 516                                 int i, numimsbs;
 517                                 for (i = 0; !tgt_decode(bio, prc->imsbtree, cblkno, i); i++) {
 518                                         ;
 519                                 }
 520                                 numimsbs = i - 1;
 521                                 cblk->numbps = band->numbps - numimsbs;
 522                                 cblk->numlenbits = 3;
 523                         }
 524                         /* number of coding passes */
 525                         cblk->numnewpasses = t2_getnumpasses(bio);
 526                         increment = t2_getcommacode(bio);
 527                         /* length indicator increment */
 528                         cblk->numlenbits += increment;
 529                         segno = 0;
 530                         if (!cblk->numsegs) {
 531                                 t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 1);
 532                         } else {
 533                                 segno = cblk->numsegs - 1;
 534                                 if (cblk->segs[segno].numpasses == cblk->segs[segno].maxpasses) {
 535                                         ++segno;
 536                                         t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 0);
 537                                 }
 538                         }
 539                         n = cblk->numnewpasses;
 540
 541                         do {
 542                                 cblk->segs[segno].numnewpasses = int_min(cblk->segs[segno].maxpasses - cblk->segs[segno].numpasses, n);
 543                                 cblk->segs[segno].newlen = bio_read(bio, cblk->numlenbits + int_floorlog2(cblk->segs[segno].numnewpasses));
 544                                 n -= cblk->segs[segno].numnewpasses;
 545                                 if (n > 0) {
 546                                         ++segno;
 547                                         t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 0);
 548                                 }
 549                         } while (n > 0);
 550                 }
 551         }
 552
 553         if (bio_inalign(bio)) {
 554                 bio_destroy(bio);
 555                 return -999;
 556         }
 557
 558         hd += bio_numbytes(bio);
 559         bio_destroy(bio);
 560
 561         /* EPH markers */
 562         if (tcp->csty & J2K_CP_CSTY_EPH) {
 563                 if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
 564                         opj_event_msg(t2->cinfo, EVT_ERROR, "Expected EPH marker\n");
 565                         return -999;
 566                 } else {
 567                         hd += 2;
 568                 }
 569         }
 570
 571         /* << INDEX */
 572         // End of packet header position. Currently only represents the distance to start of packet
 573         // Will be updated later by incrementing with packet start value
 574         if(pack_info) {
 575                 pack_info->end_ph_pos = (int)(hd - src);
 576         }
 577         /* INDEX >> */
 578
 579         if (cp->ppm==1) {
 580                 cp->ppm_len+=cp->ppm_data-hd;
 581                 cp->ppm_data = hd;
 582         } else if (tcp->ppt == 1) {
 583                 tcp->ppt_len+=tcp->ppt_data-hd;
 584                 tcp->ppt_data = hd;
 585         } else {
 586                 c=hd;
 587         }
 588
 589         for (bandno = 0; bandno < res->numbands; bandno++) {
 590                 opj_tcd_band_t *band = &res->bands[bandno];
 591                 opj_tcd_precinct_t *prc = &band->precincts[precno];
 592
 593                 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
 594
 595                 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
 596                         opj_tcd_cblk_dec_t* cblk = &prc->cblks.dec[cblkno];
 597                         opj_tcd_seg_t *seg = NULL;
 598                         if (!cblk->numnewpasses)
 599                                 continue;
 600                         if (!cblk->numsegs) {
 601                                 seg = &cblk->segs[0];
 602                                 cblk->numsegs++;
 603                                 cblk->len = 0;
 604                         } else {
 605                                 seg = &cblk->segs[cblk->numsegs - 1];
 606                                 if (seg->numpasses == seg->maxpasses) {
 607                                         seg++;
 608                                         cblk->numsegs++;
 609                                 }
 610                         }
 611
 612                         do {
 613                                 if (c + seg->newlen > src + len) {
 614                                         return -999;
 615                                 }
 616
 617 #ifdef USE_JPWL
 618                         /* we need here a j2k handle to verify if making a check to
 619                         the validity of cblocks parameters is selected from user (-W) */
 620
 621                                 /* let's check that we are not exceeding */
 622                                 if ((cblk->len + seg->newlen) > 8192) {
 623                                         opj_event_msg(t2->cinfo, EVT_WARNING,
 624                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
 625                                                 seg->newlen, cblkno, precno, bandno, resno, compno);
 626                                         if (!JPWL_ASSUME) {
 627                                                 opj_event_msg(t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
 628                                                 return -999;
 629                                         }
 630                                         seg->newlen = 8192 - cblk->len;
 631                                         opj_event_msg(t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", seg->newlen);
 632                                         break;
 633                                 };
 634
 635 #endif /* USE_JPWL */
 636
 637                                 cblk->data = (unsigned char*) opj_realloc(cblk->data, (cblk->len + seg->newlen) * sizeof(unsigned char*));
 638                                 memcpy(cblk->data + cblk->len, c, seg->newlen);
 639                                 if (seg->numpasses == 0) {
 640                                         seg->data = &cblk->data;
 641                                         seg->dataindex = cblk->len;
 642                                 }
 643                                 c += seg->newlen;
 644                                 cblk->len += seg->newlen;
 645                                 seg->len += seg->newlen;
 646                                 seg->numpasses += seg->numnewpasses;
 647                                 cblk->numnewpasses -= seg->numnewpasses;
 648                                 if (cblk->numnewpasses > 0) {
 649                                         seg++;
 650                                         cblk->numsegs++;
 651                                 }
 652                         } while (cblk->numnewpasses > 0);
 653                 }
 654         }
 655
 656         return (c - src);
 657 }
 658
 659 /* ----------------------------------------------------------------------- */
 660
 661 int t2_encode_packets(opj_t2_t* t2,int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_codestream_info_t *cstr_info,int tpnum, int tppos,int pino, J2K_T2_MODE t2_mode, int cur_totnum_tp){
 662         unsigned char *c = dest;
 663         int e = 0;
 664         int compno;
 665         opj_pi_iterator_t *pi = NULL;
 666         int poc;
 667         opj_image_t *image = t2->image;
 668         opj_cp_t *cp = t2->cp;
 669         opj_tcp_t *tcp = &cp->tcps[tileno];
 670         int pocno = cp->cinema == CINEMA4K_24? 2: 1;
 671         int maxcomp = cp->max_comp_size > 0 ? image->numcomps : 1;
 672
 673         pi = pi_initialise_encode(image, cp, tileno, t2_mode);
 674         if(!pi) {
 675                 /* TODO: throw an error */
 676                 return -999;
 677         }
 678
 679         if(t2_mode == THRESH_CALC ){ /* Calculating threshold */
 680                 for(compno = 0; compno < maxcomp; compno++ ){
 681                         for(poc = 0; poc < pocno ; poc++){
 682                                 int comp_len = 0;
 683                                 int tpnum = compno;
 684                                 if (pi_create_encode(pi, cp,tileno,poc,tpnum,tppos,t2_mode,cur_totnum_tp)) {
 685                                         opj_event_msg(t2->cinfo, EVT_ERROR, "Error initializing Packet Iterator\n");
 686                                         pi_destroy(pi, cp, tileno);
 687                                         return -999;
 688                                 }
 689                                 while (pi_next(&pi[poc])) {
 690                                         if (pi[poc].layno < maxlayers) {
 691                                                 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[poc], c, dest + len - c, cstr_info, tileno);
 692                                                 comp_len = comp_len + e;
 693                                                 if (e == -999) {
 694                                                         break;
 695                                                 } else {
 696                                                         c += e;
 697                                                 }
 698                                         }
 699                                 }
 700                                 if (e == -999) break;
 701                                 if (cp->max_comp_size){
 702                                         if (comp_len > cp->max_comp_size){
 703                                                 e = -999;
 704                                                 break;
 705                                         }
 706                                 }
 707                         }
 708                         if (e == -999)  break;
 709                 }
 710         }else{  /* t2_mode == FINAL_PASS  */
 711                 pi_create_encode(pi, cp,tileno,pino,tpnum,tppos,t2_mode,cur_totnum_tp);
 712                 while (pi_next(&pi[pino])) {
 713                         if (pi[pino].layno < maxlayers) {
 714                                 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[pino], c, dest + len - c, cstr_info, tileno);
 715                                 if (e == -999) {
 716                                         break;
 717                                 } else {
 718                                         c += e;
 719                                 }
 720                                 /* INDEX >> */
 721                                 if(cstr_info) {
 722                                         if(cstr_info->index_write) {
 723                                                 opj_tile_info_t *info_TL = &cstr_info->tile[tileno];
 724                                                 opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno];
 725                                                 if (!cstr_info->packno) {
 726                                                         info_PK->start_pos = info_TL->end_header + 1;
 727                                                 } else {
 728                                                         info_PK->start_pos = ((cp->tp_on | tcp->POC)&& info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[cstr_info->packno - 1].end_pos + 1;
 729                                                 }
 730                                                 info_PK->end_pos = info_PK->start_pos + e - 1;
 731                                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  // End of packet header which now only represents the distance
 732                                                                                                                                                                                                                                                 // to start of packet is incremented by value of start of packet
 733                                         }
 734
 735                                         cstr_info->packno++;
 736                                 }
 737                                 /* << INDEX */
 738                                 tile->packno++;
 739                         }
 740                 }
 741         }
 742
 743         pi_destroy(pi, cp, tileno);
 744
 745         if (e == -999) {
 746                 return e;
 747         }
 748
 749   return (c - dest);
 750 }
 751
 752 int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile, opj_codestream_info_t *cstr_info) {
 753         unsigned char *c = src;
 754         opj_pi_iterator_t *pi;
 755         int pino, e = 0;
 756         int n = 0, curtp = 0;
 757         int tp_start_packno;
 758
 759         opj_image_t *image = t2->image;
 760         opj_cp_t *cp = t2->cp;
 761
 762         /* create a packet iterator */
 763         pi = pi_create_decode(image, cp, tileno);
 764         if(!pi) {
 765                 /* TODO: throw an error */
 766                 return -999;
 767         }
 768
 769         tp_start_packno = 0;
 770
 771         for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) {
 772                 while (pi_next(&pi[pino])) {
 773                         if ((cp->layer==0) || (cp->layer>=((pi[pino].layno)+1))) {
 774                                 opj_packet_info_t *pack_info;
 775                                 if (cstr_info)
 776                                         pack_info = &cstr_info->tile[tileno].packet[cstr_info->packno];
 777                                 else
 778                                         pack_info = NULL;
 779                                 e = t2_decode_packet(t2, c, src + len - c, tile, &cp->tcps[tileno], &pi[pino], pack_info);
 780                         } else {
 781                                 e = 0;
 782                         }
 783                         if(e == -999) return -999;
 784                         /* progression in resolution */
 785                         image->comps[pi[pino].compno].resno_decoded =
 786                                 (e > 0) ?
 787                                 int_max(pi[pino].resno, image->comps[pi[pino].compno].resno_decoded)
 788                                 : image->comps[pi[pino].compno].resno_decoded;
 789                         n++;
 790
 791                         /* INDEX >> */
 792                         if(cstr_info) {
 793                                 opj_tile_info_t *info_TL = &cstr_info->tile[tileno];
 794                                 opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno];
 795                                 if (!cstr_info->packno) {
 796                                         info_PK->start_pos = info_TL->end_header + 1;
 797                                 } else if (info_TL->packet[cstr_info->packno-1].end_pos >= (int)cstr_info->tile[tileno].tp[curtp].tp_end_pos){ // New tile part
 798                                         info_TL->tp[curtp].tp_numpacks = cstr_info->packno - tp_start_packno; // Number of packets in previous tile-part
 799           info_TL->tp[curtp].tp_start_pack = tp_start_packno;
 800                                         tp_start_packno = cstr_info->packno;
 801                                         curtp++;
 802                                         info_PK->start_pos = cstr_info->tile[tileno].tp[curtp].tp_end_header+1;
 803                                 } else {
 804                                         info_PK->start_pos = (cp->tp_on && info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[cstr_info->packno - 1].end_pos + 1;
 805                                 }
 806                                 info_PK->end_pos = info_PK->start_pos + e - 1;
 807                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  // End of packet header which now only represents the distance
 808                                                                                                                                                                                                                                 // to start of packet is incremented by value of start of packet
 809                                 cstr_info->packno++;
 810                         }
 811                         /* << INDEX */
 812
 813                         if (e == -999) {                /* ADD */
 814                                 break;
 815                         } else {
 816                                 c += e;
 817                         }
 818                 }
 819         }
 820         /* INDEX >> */
 821         if(cstr_info) {
 822                 cstr_info->tile[tileno].tp[curtp].tp_numpacks = cstr_info->packno - tp_start_packno; // Number of packets in last tile-part
 823     cstr_info->tile[tileno].tp[curtp].tp_start_pack = tp_start_packno;
 824         }
 825         /* << INDEX */
 826
 827         /* don't forget to release pi */
 828         pi_destroy(pi, cp, tileno);
 829
 830         if (e == -999) {
 831                 return e;
 832         }
 833
 834         return (c - src);
 835 }
 836
 837 opj_bool t2_decode_packets_v2(
 838                                                 opj_t2_v2_t *p_t2,
 839                                                 OPJ_UINT32 p_tile_no,
 840                                                 struct opj_tcd_tile *p_tile,
 841                                                 OPJ_BYTE *p_src,
 842                                                 OPJ_UINT32 * p_data_read,
 843                                                 OPJ_UINT32 p_max_len,
 844                                                 struct opj_codestream_info_v2 *p_cstr_info)
 845 {
 846         OPJ_BYTE *l_current_data = p_src;
 847         opj_pi_iterator_t *l_pi = 00;
 848         OPJ_UINT32 pino;
 849         opj_image_header_t *l_image = p_t2->image;
 850         opj_cp_v2_t *l_cp = p_t2->cp;
 851         opj_cp_v2_t *cp = p_t2->cp;
 852         opj_tcp_v2_t *l_tcp = &(p_t2->cp->tcps[p_tile_no]);
 853         OPJ_UINT32 l_nb_bytes_read;
 854         OPJ_UINT32 l_nb_pocs = l_tcp->numpocs + 1;
 855         opj_pi_iterator_t *l_current_pi = 00;
 856         OPJ_UINT32 curtp = 0;
 857         OPJ_UINT32 tp_start_packno;
 858         opj_packet_info_t *l_pack_info = 00;
 859         opj_image_comp_header_t* l_img_comp = 00;
 860
 861
 862         if (p_cstr_info) {
 863                 l_pack_info = p_cstr_info->tile[p_tile_no].packet;
 864         }
 865
 866         /* create a packet iterator */
 867         l_pi = pi_create_decode_v2(l_image, l_cp, p_tile_no);
 868         if (!l_pi) {
 869                 return OPJ_FALSE;
 870         }
 871
 872         tp_start_packno = 0;
 873         l_current_pi = l_pi;
 874
 875         for     (pino = 0; pino <= l_tcp->numpocs; ++pino) {
 876
 877                 while (pi_next(l_current_pi)) {
 878
 879                         if (l_tcp->num_layers_to_decode > l_current_pi->layno
 880                                         && l_current_pi->resno < p_tile->comps[l_current_pi->compno].minimum_num_resolutions) {
 881                                 l_nb_bytes_read = 0;
 882
 883                                 if (! t2_decode_packet_v2(p_t2,p_tile,l_tcp,l_current_pi,l_current_data,&l_nb_bytes_read,p_max_len,l_pack_info)) {
 884                                         pi_destroy_v2(l_pi,l_nb_pocs);
 885                                         return OPJ_FALSE;
 886                                 }
 887
 888                                 l_img_comp = &(l_image->comps[l_current_pi->compno]);
 889                                 l_img_comp->resno_decoded = uint_max(l_current_pi->resno, l_img_comp->resno_decoded);
 890                         }
 891                         else {
 892                                 l_nb_bytes_read = 0;
 893                                 if (! 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)) {
 894                                         pi_destroy_v2(l_pi,l_nb_pocs);
 895                                         return OPJ_FALSE;
 896                                 }
 897                         }
 898
 899                         l_current_data += l_nb_bytes_read;
 900                         p_max_len -= l_nb_bytes_read;
 901
 902                         /* INDEX >> */
 903                         if(p_cstr_info) {
 904                                 opj_tile_info_v2_t *info_TL = &p_cstr_info->tile[p_tile_no];
 905                                 opj_packet_info_t *info_PK = &info_TL->packet[p_cstr_info->packno];
 906                                 if (!p_cstr_info->packno) {
 907                                         info_PK->start_pos = info_TL->end_header + 1;
 908                                 } 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
 909                                         info_TL->tp[curtp].tp_numpacks = p_cstr_info->packno - tp_start_packno; // Number of packets in previous tile-part
 910                                         tp_start_packno = p_cstr_info->packno;
 911                                         curtp++;
 912                                         info_PK->start_pos = p_cstr_info->tile[p_tile_no].tp[curtp].tp_end_header+1;
 913                                 } else {
 914                                         info_PK->start_pos = (cp->m_specific_param.m_enc.m_tp_on && info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[p_cstr_info->packno - 1].end_pos + 1;
 915                                 }
 916                                 info_PK->end_pos = info_PK->start_pos + l_nb_bytes_read - 1;
 917                                 info_PK->end_ph_pos += info_PK->start_pos - 1;  // End of packet header which now only represents the distance
 918                                 ++p_cstr_info->packno;
 919                         }
 920                         /* << INDEX */
 921                 }
 922                 ++l_current_pi;
 923         }
 924         /* INDEX >> */
 925         if
 926                 (p_cstr_info) {
 927                 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
 928         }
 929         /* << INDEX */
 930
 931         /* don't forget to release pi */
 932         pi_destroy_v2(l_pi,l_nb_pocs);
 933         *p_data_read = l_current_data - p_src;
 934         return OPJ_TRUE;
 935 }
 936
 937 /* ----------------------------------------------------------------------- */
 938
 939 opj_t2_t* t2_create(opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp) {
 940         /* create the tcd structure */
 941         opj_t2_t *t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
 942         if(!t2) return NULL;
 943         t2->cinfo = cinfo;
 944         t2->image = image;
 945         t2->cp = cp;
 946
 947         return t2;
 948 }
 949
 950 /**
 951  * Creates a Tier 2 handle
 952  *
 953  * @param       p_image         Source or destination image
 954  * @param       p_cp            Image coding parameters.
 955  * @return              a new T2 handle if successful, NULL otherwise.
 956 */
 957 opj_t2_v2_t* t2_create_v2(
 958                                         opj_image_header_t *p_image,
 959                                         opj_cp_v2_t *p_cp)
 960 {
 961         /* create the tcd structure */
 962         opj_t2_v2_t *l_t2 = (opj_t2_v2_t*)opj_malloc(sizeof(opj_t2_v2_t));
 963         if
 964                 (!l_t2)
 965         {
 966                 return 00;
 967         }
 968         memset(l_t2,0,sizeof(opj_t2_t));
 969         l_t2->image = p_image;
 970         l_t2->cp = p_cp;
 971         return l_t2;
 972 }
 973
 974 void t2_destroy(opj_t2_t *t2) {
 975         if(t2) {
 976                 opj_free(t2);
 977         }
 978 }
 979
 980 void t2_destroy_v2(opj_t2_v2_t *t2) {
 981         if(t2) {
 982                 opj_free(t2);
 983         }
 984 }
 985
 986
 987 static opj_bool t2_decode_packet_v2(
 988                                                          opj_t2_v2_t* p_t2,
 989                                                          opj_tcd_tile_t *p_tile,
 990                              opj_tcp_v2_t *p_tcp,
 991                                                          opj_pi_iterator_t *p_pi,
 992                                                          OPJ_BYTE *p_src,
 993                                                          OPJ_UINT32 * p_data_read,
 994                                                          OPJ_UINT32 p_max_length,
 995                                                          opj_packet_info_t *p_pack_info)
 996 {
 997         opj_bool l_read_data;
 998         OPJ_UINT32 l_nb_bytes_read = 0;
 999         OPJ_UINT32 l_nb_total_bytes_read = 0;
1000
1001         *p_data_read = 0;
1002
1003         if (! 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)) {
1004                 return OPJ_FALSE;
1005         }
1006
1007         p_src += l_nb_bytes_read;
1008         l_nb_total_bytes_read += l_nb_bytes_read;
1009         p_max_length -= l_nb_bytes_read;
1010
1011         /* we should read data for the packet */
1012         if (l_read_data) {
1013                 l_nb_bytes_read = 0;
1014
1015                 if (! t2_read_packet_data(p_t2,p_tile,p_pi,p_src,&l_nb_bytes_read,p_max_length,p_pack_info)) {
1016                         return OPJ_FALSE;
1017                 }
1018
1019                 l_nb_total_bytes_read += l_nb_bytes_read;
1020         }
1021
1022         *p_data_read = l_nb_total_bytes_read;
1023
1024         return OPJ_FALSE;
1025 }
1026
1027 static opj_bool t2_skip_packet(
1028                                                          opj_t2_v2_t* p_t2,
1029                                                          opj_tcd_tile_t *p_tile,
1030                              opj_tcp_v2_t *p_tcp,
1031                                                          opj_pi_iterator_t *p_pi,
1032                                                          OPJ_BYTE *p_src,
1033                                                          OPJ_UINT32 * p_data_read,
1034                                                          OPJ_UINT32 p_max_length,
1035                                                          opj_packet_info_t *p_pack_info)
1036 {
1037         opj_bool l_read_data;
1038         OPJ_UINT32 l_nb_bytes_read = 0;
1039         OPJ_UINT32 l_nb_total_bytes_read = 0;
1040
1041         *p_data_read = 0;
1042
1043         if
1044                 (! 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))
1045         {
1046                 return OPJ_FALSE;
1047         }
1048         p_src += l_nb_bytes_read;
1049         l_nb_total_bytes_read += l_nb_bytes_read;
1050         p_max_length -= l_nb_bytes_read;
1051         /* we should read data for the packet */
1052         if
1053                 (l_read_data)
1054         {
1055                 l_nb_bytes_read = 0;
1056                 if
1057                         (! t2_skip_packet_data(p_t2,p_tile,p_pi,&l_nb_bytes_read,p_max_length,p_pack_info))
1058                 {
1059                         return OPJ_FALSE;
1060                 }
1061                 l_nb_total_bytes_read += l_nb_bytes_read;
1062         }
1063         *p_data_read = l_nb_total_bytes_read;
1064         return OPJ_TRUE;
1065 }
1066
1067
1068
1069 static opj_bool t2_read_packet_header(
1070                                                          opj_t2_v2_t* p_t2,
1071                                                          opj_tcd_tile_t *p_tile,
1072                              opj_tcp_v2_t *p_tcp,
1073                                                          opj_pi_iterator_t *p_pi,
1074                                                          opj_bool * p_is_data_present,
1075                                                          OPJ_BYTE *p_src_data,
1076                                                          OPJ_UINT32 * p_data_read,
1077                                                          OPJ_UINT32 p_max_length,
1078                                                          opj_packet_info_t *p_pack_info)
1079 {
1080         /* loop */
1081         OPJ_UINT32 bandno, cblkno;
1082         OPJ_UINT32 l_nb_code_blocks;
1083         OPJ_UINT32 l_remaining_length;
1084         OPJ_UINT32 l_header_length;
1085         OPJ_UINT32 * l_modified_length_ptr = 00;
1086         OPJ_BYTE *l_current_data = p_src_data;
1087         opj_cp_v2_t *l_cp = p_t2->cp;
1088         opj_bio_t *l_bio = 00;  /* BIO component */
1089         opj_tcd_band_t *l_band = 00;
1090         opj_tcd_cblk_dec_t* l_cblk = 00;
1091         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1092
1093         OPJ_BYTE *l_header_data = 00;
1094         OPJ_BYTE **l_header_data_start = 00;
1095
1096         OPJ_UINT32 l_present;
1097
1098         if
1099                 (p_pi->layno == 0)
1100         {
1101                 l_band = l_res->bands;
1102                 /* reset tagtrees */
1103                 for
1104                         (bandno = 0; bandno < l_res->numbands; ++bandno)
1105                 {
1106                         opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1107
1108                         if (
1109                                 ! ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0)))
1110                         {
1111                                 tgt_reset(l_prc->incltree);
1112                                 tgt_reset(l_prc->imsbtree);
1113                                 l_cblk = l_prc->cblks.dec;
1114                                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1115                                 for
1116                                         (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno)
1117                                 {
1118                                         l_cblk->numsegs = 0;
1119                                         l_cblk->real_num_segs = 0;
1120                                         ++l_cblk;
1121                                 }
1122                         }
1123                         ++l_band;
1124                 }
1125         }
1126
1127         /* SOP markers */
1128
1129         if (p_tcp->csty & J2K_CP_CSTY_SOP) {
1130                 if ((*l_current_data) != 0xff || (*(l_current_data + 1) != 0x91)) {
1131                         // TODO opj_event_msg(t2->cinfo->event_mgr, EVT_WARNING, "Expected SOP marker\n");
1132                 } else {
1133                         l_current_data += 6;
1134                 }
1135
1136                 /** TODO : check the Nsop value */
1137         }
1138
1139         /*
1140         When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
1141         This part deal with this caracteristic
1142         step 1: Read packet header in the saved structure
1143         step 2: Return to codestream for decoding
1144         */
1145
1146         l_bio = bio_create();
1147         if
1148                 (! l_bio)
1149         {
1150                 return OPJ_FALSE;
1151         }
1152
1153         if
1154                 (l_cp->ppm == 1)
1155         {               /* PPM */
1156                 l_header_data_start = &l_cp->ppm_data;
1157                 l_header_data = *l_header_data_start;
1158                 l_modified_length_ptr = &(l_cp->ppm_len);
1159
1160         }
1161         else if
1162                 (p_tcp->ppt == 1)
1163         {       /* PPT */
1164                 l_header_data_start = &(p_tcp->ppt_data);
1165                 l_header_data = *l_header_data_start;
1166                 l_modified_length_ptr = &(p_tcp->ppt_len);
1167         }
1168         else
1169         {       /* Normal Case */
1170                 l_header_data_start = &(l_current_data);
1171                 l_header_data = *l_header_data_start;
1172                 l_remaining_length = p_src_data+p_max_length-l_header_data;
1173                 l_modified_length_ptr = &(l_remaining_length);
1174         }
1175         bio_init_dec(l_bio, l_header_data,*l_modified_length_ptr);
1176         l_present = bio_read(l_bio, 1);
1177         if
1178                 (!l_present)
1179         {
1180                 bio_inalign(l_bio);
1181                 l_header_data += bio_numbytes(l_bio);
1182                 bio_destroy(l_bio);
1183                 /* EPH markers */
1184                 if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1185                         if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1186                                 printf("Error : expected EPH marker\n");
1187                         } else {
1188                                 l_header_data += 2;
1189                         }
1190                 }
1191                 l_header_length = (l_header_data - *l_header_data_start);
1192                 *l_modified_length_ptr -= l_header_length;
1193                 *l_header_data_start += l_header_length;
1194                 /* << INDEX */
1195                 // End of packet header position. Currently only represents the distance to start of packet
1196                 // Will be updated later by incrementing with packet start value
1197                 if
1198                         (p_pack_info)
1199                 {
1200                         p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1201                 }
1202                 /* INDEX >> */
1203                 * p_is_data_present = OPJ_FALSE;
1204                 *p_data_read = l_current_data - p_src_data;
1205                 return OPJ_TRUE;
1206         }
1207
1208         l_band = l_res->bands;
1209         for
1210                 (bandno = 0; bandno < l_res->numbands; ++bandno)
1211         {
1212                 opj_tcd_precinct_t *l_prc = &(l_band->precincts[p_pi->precno]);
1213
1214                 if ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0))
1215                 {
1216                         ++l_band;
1217                         continue;
1218                 }
1219                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1220                 l_cblk = l_prc->cblks.dec;
1221                 for
1222                         (cblkno = 0; cblkno < l_nb_code_blocks; cblkno++)
1223                 {
1224                         OPJ_UINT32 l_included,l_increment, l_segno;
1225                         OPJ_INT32 n;
1226                         /* if cblk not yet included before --> inclusion tagtree */
1227                         if
1228                                 (!l_cblk->numsegs)
1229                         {
1230                                 l_included = tgt_decode(l_bio, l_prc->incltree, cblkno, p_pi->layno + 1);
1231                                 /* else one bit */
1232                         }
1233                         else
1234                         {
1235                                 l_included = bio_read(l_bio, 1);
1236                         }
1237                         /* if cblk not included */
1238                         if
1239                                 (!l_included)
1240                         {
1241                                 l_cblk->numnewpasses = 0;
1242                                 ++l_cblk;
1243                                 continue;
1244                         }
1245                         /* if cblk not yet included --> zero-bitplane tagtree */
1246                         if
1247                                 (!l_cblk->numsegs)
1248                         {
1249                                 OPJ_UINT32 i = 0;
1250                                 while
1251                                         (!tgt_decode(l_bio, l_prc->imsbtree, cblkno, i))
1252                                 {
1253                                         ++i;
1254                                 }
1255                                 l_cblk->numbps = l_band->numbps + 1 - i;
1256                                 l_cblk->numlenbits = 3;
1257                         }
1258                         /* number of coding passes */
1259                         l_cblk->numnewpasses = t2_getnumpasses(l_bio);
1260                         l_increment = t2_getcommacode(l_bio);
1261                         /* length indicator increment */
1262                         l_cblk->numlenbits += l_increment;
1263                         l_segno = 0;
1264                         if
1265                                 (!l_cblk->numsegs)
1266                         {
1267                                 if
1268                                         (! t2_init_seg_v2(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 1))
1269                                 {
1270                                         bio_destroy(l_bio);
1271                                         return OPJ_FALSE;
1272                                 }
1273
1274                         }
1275                         else
1276                         {
1277                                 l_segno = l_cblk->numsegs - 1;
1278                                 if
1279                                         (l_cblk->segs[l_segno].numpasses == l_cblk->segs[l_segno].maxpasses)
1280                                 {
1281                                         ++l_segno;
1282                                         if
1283                                                 (! t2_init_seg_v2(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0))
1284                                         {
1285                                                 bio_destroy(l_bio);
1286                                                 return OPJ_FALSE;
1287                                         }
1288                                 }
1289                         }
1290                         n = l_cblk->numnewpasses;
1291
1292                         do {
1293                                 l_cblk->segs[l_segno].numnewpasses = int_min(l_cblk->segs[l_segno].maxpasses - l_cblk->segs[l_segno].numpasses, n);
1294                                 l_cblk->segs[l_segno].newlen = bio_read(l_bio, l_cblk->numlenbits + uint_floorlog2(l_cblk->segs[l_segno].numnewpasses));
1295                                 n -= l_cblk->segs[l_segno].numnewpasses;
1296                                 if
1297                                         (n > 0)
1298                                 {
1299                                         ++l_segno;
1300                                         if
1301                                                 (! t2_init_seg_v2(l_cblk, l_segno, p_tcp->tccps[p_pi->compno].cblksty, 0))
1302                                         {
1303                                                 bio_destroy(l_bio);
1304                                                 return OPJ_FALSE;
1305                                         }
1306                                 }
1307                         }
1308                         while (n > 0);
1309                         ++l_cblk;
1310                 }
1311                 ++l_band;
1312         }
1313
1314         if
1315                 (bio_inalign(l_bio))
1316         {
1317                 bio_destroy(l_bio);
1318                 return OPJ_FALSE;
1319         }
1320
1321         l_header_data += bio_numbytes(l_bio);
1322         bio_destroy(l_bio);
1323
1324         /* EPH markers */
1325         if (p_tcp->csty & J2K_CP_CSTY_EPH) {
1326                 if ((*l_header_data) != 0xff || (*(l_header_data + 1) != 0x92)) {
1327                         // TODO opj_event_msg(t2->cinfo->event_mgr, EVT_ERROR, "Expected EPH marker\n");
1328                 } else {
1329                         l_header_data += 2;
1330                 }
1331         }
1332
1333
1334         l_header_length = (l_header_data - *l_header_data_start);
1335         *l_modified_length_ptr -= l_header_length;
1336         *l_header_data_start += l_header_length;
1337         /* << INDEX */
1338         // End of packet header position. Currently only represents the distance to start of packet
1339         // Will be updated later by incrementing with packet start value
1340         if
1341                 (p_pack_info)
1342         {
1343                 p_pack_info->end_ph_pos = (OPJ_INT32)(l_current_data - p_src_data);
1344         }
1345         /* INDEX >> */
1346         * p_is_data_present = OPJ_TRUE;
1347         *p_data_read = l_current_data - p_src_data;
1348         return OPJ_TRUE;
1349 }
1350
1351 static opj_bool t2_read_packet_data(
1352                                                          opj_t2_v2_t* p_t2,
1353                                                          opj_tcd_tile_t *p_tile,
1354                                                          opj_pi_iterator_t *p_pi,
1355                                                          OPJ_BYTE *p_src_data,
1356                                                          OPJ_UINT32 * p_data_read,
1357                                                          OPJ_UINT32 p_max_length,
1358                                                          opj_packet_info_t *pack_info)
1359 {
1360         OPJ_UINT32 bandno, cblkno;
1361         OPJ_UINT32 l_nb_code_blocks;
1362         OPJ_BYTE *l_current_data = p_src_data;
1363         opj_tcd_band_t *l_band = 00;
1364         opj_tcd_cblk_dec_t* l_cblk = 00;
1365         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1366
1367         l_band = l_res->bands;
1368         for
1369                 (bandno = 0; bandno < l_res->numbands; ++bandno)
1370         {
1371                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1372
1373                 if
1374                         ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0))
1375                 {
1376                         ++l_band;
1377                         continue;
1378                 }
1379                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1380                 l_cblk = l_prc->cblks.dec;
1381                 for
1382                         (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno)
1383                 {
1384                         opj_tcd_seg_t *l_seg = 00;
1385                         if
1386                                 (!l_cblk->numnewpasses)
1387                         {
1388                                 /* nothing to do */
1389                                 ++l_cblk;
1390                                 continue;
1391                         }
1392                         if
1393                                 (!l_cblk->numsegs)
1394                         {
1395                                 l_seg = l_cblk->segs;
1396                                 ++l_cblk->numsegs;
1397                                 l_cblk->len = 0;
1398                         }
1399                         else
1400                         {
1401                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1402                                 if
1403                                         (l_seg->numpasses == l_seg->maxpasses)
1404                                 {
1405                                         ++l_seg;
1406                                         ++l_cblk->numsegs;
1407                                 }
1408                         }
1409
1410                         do
1411                         {
1412                                 if
1413                                         (l_current_data + l_seg->newlen > p_src_data + p_max_length)
1414                                 {
1415                                         return OPJ_FALSE;
1416                                 }
1417
1418 #ifdef USE_JPWL
1419                         /* we need here a j2k handle to verify if making a check to
1420                         the validity of cblocks parameters is selected from user (-W) */
1421
1422                                 /* let's check that we are not exceeding */
1423                                 if ((cblk->len + seg->newlen) > 8192) {
1424                                         opj_event_msg(t2->cinfo, EVT_WARNING,
1425                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1426                                                 seg->newlen, cblkno, precno, bandno, resno, compno);
1427                                         if (!JPWL_ASSUME) {
1428                                                 opj_event_msg(t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1429                                                 return -999;
1430                                         }
1431                                         seg->newlen = 8192 - cblk->len;
1432                                         opj_event_msg(t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", seg->newlen);
1433                                         break;
1434                                 };
1435
1436 #endif /* USE_JPWL */
1437
1438                                 memcpy(l_cblk->data + l_cblk->len, l_current_data, l_seg->newlen);
1439                                 if
1440                                         (l_seg->numpasses == 0)
1441                                 {
1442                                         l_seg->data = &l_cblk->data;
1443                                         l_seg->dataindex = l_cblk->len;
1444                                 }
1445                                 l_current_data += l_seg->newlen;
1446                                 l_seg->numpasses += l_seg->numnewpasses;
1447                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1448
1449                                 l_seg->real_num_passes = l_seg->numpasses;
1450                                 l_cblk->len += l_seg->newlen;
1451                                 l_seg->len += l_seg->newlen;
1452                                 if
1453                                         (l_cblk->numnewpasses > 0)
1454                                 {
1455                                         ++l_seg;
1456                                         ++l_cblk->numsegs;
1457                                 }
1458                         }
1459                         while (l_cblk->numnewpasses > 0);
1460                         l_cblk->real_num_segs = l_cblk->numsegs;
1461                         ++l_cblk;
1462                 }
1463                 ++l_band;
1464         }
1465         *(p_data_read) = l_current_data - p_src_data;
1466         return OPJ_TRUE;
1467 }
1468
1469 static opj_bool t2_skip_packet_data(
1470                                                          opj_t2_v2_t* p_t2,
1471                                                          opj_tcd_tile_t *p_tile,
1472                                                          opj_pi_iterator_t *p_pi,
1473                                                          OPJ_UINT32 * p_data_read,
1474                                                          OPJ_UINT32 p_max_length,
1475                                                          opj_packet_info_t *pack_info)
1476 {
1477         OPJ_UINT32 bandno, cblkno;
1478         OPJ_UINT32 l_nb_code_blocks;
1479         opj_tcd_band_t *l_band = 00;
1480         opj_tcd_cblk_dec_t* l_cblk = 00;
1481
1482         opj_tcd_resolution_t* l_res = &p_tile->comps[p_pi->compno].resolutions[p_pi->resno];
1483
1484         *p_data_read = 0;
1485         l_band = l_res->bands;
1486         for
1487                 (bandno = 0; bandno < l_res->numbands; ++bandno)
1488         {
1489                 opj_tcd_precinct_t *l_prc = &l_band->precincts[p_pi->precno];
1490
1491                 if
1492                         ((l_band->x1-l_band->x0 == 0)||(l_band->y1-l_band->y0 == 0))
1493                 {
1494                         ++l_band;
1495                         continue;
1496                 }
1497                 l_nb_code_blocks = l_prc->cw * l_prc->ch;
1498                 l_cblk = l_prc->cblks.dec;
1499                 for
1500                         (cblkno = 0; cblkno < l_nb_code_blocks; ++cblkno)
1501                 {
1502                         opj_tcd_seg_t *l_seg = 00;
1503                         if
1504                                 (!l_cblk->numnewpasses)
1505                         {
1506                                 /* nothing to do */
1507                                 ++l_cblk;
1508                                 continue;
1509                         }
1510                         if
1511                                 (!l_cblk->numsegs)
1512                         {
1513                                 l_seg = l_cblk->segs;
1514                                 ++l_cblk->numsegs;
1515                                 l_cblk->len = 0;
1516                         }
1517                         else
1518                         {
1519                                 l_seg = &l_cblk->segs[l_cblk->numsegs - 1];
1520                                 if
1521                                         (l_seg->numpasses == l_seg->maxpasses)
1522                                 {
1523                                         ++l_seg;
1524                                         ++l_cblk->numsegs;
1525                                 }
1526                         }
1527
1528                         do
1529                         {
1530                                 if
1531                                         (* p_data_read + l_seg->newlen > p_max_length)
1532                                 {
1533                                         return OPJ_FALSE;
1534                                 }
1535
1536 #ifdef USE_JPWL
1537                         /* we need here a j2k handle to verify if making a check to
1538                         the validity of cblocks parameters is selected from user (-W) */
1539
1540                                 /* let's check that we are not exceeding */
1541                                 if ((cblk->len + seg->newlen) > 8192) {
1542                                         opj_event_msg(t2->cinfo, EVT_WARNING,
1543                                                 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
1544                                                 seg->newlen, cblkno, precno, bandno, resno, compno);
1545                                         if (!JPWL_ASSUME) {
1546                                                 opj_event_msg(t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
1547                                                 return -999;
1548                                         }
1549                                         seg->newlen = 8192 - cblk->len;
1550                                         opj_event_msg(t2->cinfo, EVT_WARNING, "      - truncating segment to %d\n", seg->newlen);
1551                                         break;
1552                                 };
1553
1554 #endif /* USE_JPWL */
1555                                 *(p_data_read) += l_seg->newlen;
1556                                 l_seg->numpasses += l_seg->numnewpasses;
1557                                 l_cblk->numnewpasses -= l_seg->numnewpasses;
1558                                 if
1559                                         (l_cblk->numnewpasses > 0)
1560                                 {
1561                                         ++l_seg;
1562                                         ++l_cblk->numsegs;
1563                                 }
1564                         }
1565                         while (l_cblk->numnewpasses > 0);
1566                         ++l_cblk;
1567                 }
1568                 ++l_band;
1569         }
1570         return OPJ_TRUE;
1571 }
1572
1573
1574 static opj_bool t2_init_seg_v2(opj_tcd_cblk_dec_t* cblk, OPJ_UINT32 index, OPJ_UINT32 cblksty, OPJ_UINT32 first)
1575 {
1576         opj_tcd_seg_t* seg = 00;
1577         OPJ_UINT32 l_nb_segs = index + 1;
1578
1579         if
1580                 (l_nb_segs > cblk->m_current_max_segs)
1581         {
1582                 cblk->m_current_max_segs += J2K_DEFAULT_NB_SEGS;
1583         cblk->segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, cblk->m_current_max_segs * sizeof(opj_tcd_seg_t));
1584                 if
1585                         (! cblk->segs)
1586                 {
1587                         return OPJ_FALSE;
1588                 }
1589         }
1590         seg = &cblk->segs[index];
1591         memset(seg,0,sizeof(opj_tcd_seg_t));
1592
1593         if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
1594                 seg->maxpasses = 1;
1595         }
1596         else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
1597                 if (first) {
1598                         seg->maxpasses = 10;
1599                 } else {
1600                         seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
1601                 }
1602         } else {
1603                 seg->maxpasses = 109;
1604         }
1605         return OPJ_TRUE;
1606 }