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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
40static void t2_putcommacode(opj_bio_t *bio, int n);
41static int t2_getcommacode(opj_bio_t *bio);
42/**
43Variable length code for signalling delta Zil (truncation point)
44@param bio Bit Input/Output component
45@param n delta Zil
46*/
47static void t2_putnumpasses(opj_bio_t *bio, int n);
48static int t2_getnumpasses(opj_bio_t *bio);
49/**
50Encode 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 image_info Structure to create an index file
57@param tileno Number of the tile encoded
58@return
59*/
60static int t2_encode_packet(opj_tcd_tile_t *tile, opj_tcp_t *tcp, opj_pi_iterator_t *pi, unsigned char *dest, int len, opj_image_info_t *image_info, int tileno);
61/**
62@param seg
63@param cblksty
64@param first
65*/
66static void t2_init_seg(opj_tcd_seg_t *seg, int cblksty, int first);
67/**
68Decode a packet of a tile from a source buffer
69@param t2 T2 handle
70@param src Source buffer
71@param len Length of the source buffer
72@param tile Tile for which to write the packets
73@param tcp Tile coding parameters
74@param pi Packet identity
75@return
76*/
77static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile, opj_tcp_t *tcp, opj_pi_iterator_t *pi);
78
79/*@}*/
80
81/*@}*/
82
83/* ----------------------------------------------------------------------- */
84
85/* #define RESTART 0x04 */
86
87static void t2_putcommacode(opj_bio_t *bio, int n) {
88 while (--n >= 0) {
89 bio_write(bio, 1, 1);
90 }
91 bio_write(bio, 0, 1);
92}
93
94static int t2_getcommacode(opj_bio_t *bio) {
95 int n;
96 for (n = 0; bio_read(bio, 1); n++) {
97 ;
98 }
99 return n;
100}
101
102static void t2_putnumpasses(opj_bio_t *bio, int n) {
103 if (n == 1) {
104 bio_write(bio, 0, 1);
105 } else if (n == 2) {
106 bio_write(bio, 2, 2);
107 } else if (n <= 5) {
108 bio_write(bio, 0xc | (n - 3), 4);
109 } else if (n <= 36) {
110 bio_write(bio, 0x1e0 | (n - 6), 9);
111 } else if (n <= 164) {
112 bio_write(bio, 0xff80 | (n - 37), 16);
113 }
114}
115
116static int t2_getnumpasses(opj_bio_t *bio) {
117 int n;
118 if (!bio_read(bio, 1))
119 return 1;
120 if (!bio_read(bio, 1))
121 return 2;
122 if ((n = bio_read(bio, 2)) != 3)
123 return (3 + n);
124 if ((n = bio_read(bio, 5)) != 31)
125 return (6 + n);
126 return (37 + bio_read(bio, 7));
127}
128
129static int t2_encode_packet(opj_tcd_tile_t * tile, opj_tcp_t * tcp, opj_pi_iterator_t *pi, unsigned char *dest, int length, opj_image_info_t * image_info, int tileno) {
130 int bandno, cblkno;
131 unsigned char *sop = 0, *eph = 0;
132 unsigned char *c = dest;
133
134 int compno = pi->compno; /* component value */
135 int resno = pi->resno; /* resolution level value */
136 int precno = pi->precno; /* precinct value */
137 int layno = pi->layno; /* quality layer value */
138
139 opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
140 opj_tcd_resolution_t *res = &tilec->resolutions[resno];
141
142 opj_bio_t *bio = NULL; /* BIO component */
143
144 /* <SOP 0xff91> */
145 if (tcp->csty & J2K_CP_CSTY_SOP) {
146 sop = (unsigned char *) opj_malloc(6 * sizeof(unsigned char));
147 sop[0] = 255;
148 sop[1] = 145;
149 sop[2] = 0;
150 sop[3] = 4;
151 sop[4] = (image_info->num % 65536) / 256;
152 sop[5] = (image_info->num % 65536) % 256;
153 memcpy(c, sop, 6);
154 opj_free(sop);
155 c += 6;
156 }
157 /* </SOP> */
158
159 if (!layno) {
160 for (bandno = 0; bandno < res->numbands; bandno++) {
161 opj_tcd_band_t *band = &res->bands[bandno];
162 opj_tcd_precinct_t *prc = &band->precincts[precno];
163 tgt_reset(prc->incltree);
164 tgt_reset(prc->imsbtree);
165 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
166 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
167 cblk->numpasses = 0;
168 tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
169 }
170 }
171 }
172
173 bio = bio_create();
174 bio_init_enc(bio, c, length);
175 bio_write(bio, 1, 1); /* Empty header bit */
176
177 /* Writing Packet header */
178 for (bandno = 0; bandno < res->numbands; bandno++) {
179 opj_tcd_band_t *band = &res->bands[bandno];
180 opj_tcd_precinct_t *prc = &band->precincts[precno];
181 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
182 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
183 opj_tcd_layer_t *layer = &cblk->layers[layno];
184 if (!cblk->numpasses && layer->numpasses) {
185 tgt_setvalue(prc->incltree, cblkno, layno);
186 }
187 }
188 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
189 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
190 opj_tcd_layer_t *layer = &cblk->layers[layno];
191 int increment = 0;
192 int nump = 0;
193 int len = 0, passno;
194 /* cblk inclusion bits */
195 if (!cblk->numpasses) {
196 tgt_encode(bio, prc->incltree, cblkno, layno + 1);
197 } else {
198 bio_write(bio, layer->numpasses != 0, 1);
199 }
200 /* if cblk not included, go to the next cblk */
201 if (!layer->numpasses) {
202 continue;
203 }
204 /* if first instance of cblk --> zero bit-planes information */
205 if (!cblk->numpasses) {
206 cblk->numlenbits = 3;
207 tgt_encode(bio, prc->imsbtree, cblkno, 999);
208 }
209 /* number of coding passes included */
210 t2_putnumpasses(bio, layer->numpasses);
211
212 /* computation of the increase of the length indicator and insertion in the header */
213 for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) {
214 opj_tcd_pass_t *pass = &cblk->passes[passno];
215 nump++;
216 len += pass->len;
217 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
218 increment = int_max(increment, int_floorlog2(len) + 1 - (cblk->numlenbits + int_floorlog2(nump)));
219 len = 0;
220 nump = 0;
221 }
222 }
223 t2_putcommacode(bio, increment);
224
225 /* computation of the new Length indicator */
226 cblk->numlenbits += increment;
227
228 /* insertion of the codeword segment length */
229 for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) {
230 opj_tcd_pass_t *pass = &cblk->passes[passno];
231 nump++;
232 len += pass->len;
233 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
234 bio_write(bio, len, cblk->numlenbits + int_floorlog2(nump));
235 len = 0;
236 nump = 0;
237 }
238 }
239 }
240 }
241
242 if (bio_flush(bio)) {
243 return -999; /* modified to eliminate longjmp !! */
244 }
245
246 c += bio_numbytes(bio);
247
248 bio_destroy(bio);
249
250 /* <EPH 0xff92> */
251 if (tcp->csty & J2K_CP_CSTY_EPH) {
252 eph = (unsigned char *) opj_malloc(2 * sizeof(unsigned char));
253 eph[0] = 255;
254 eph[1] = 146;
255 memcpy(c, eph, 2);
256 opj_free(eph);
257 c += 2;
258 }
259 /* </EPH> */
260
261 /* Writing the packet body */
262
263 for (bandno = 0; bandno < res->numbands; bandno++) {
264 opj_tcd_band_t *band = &res->bands[bandno];
265 opj_tcd_precinct_t *prc = &band->precincts[precno];
266 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
267 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
268 opj_tcd_layer_t *layer = &cblk->layers[layno];
269 if (!layer->numpasses) {
270 continue;
271 }
272 if (c + layer->len > dest + length) {
273 return -999;
274 }
275
276 memcpy(c, layer->data, layer->len);
277 cblk->numpasses += layer->numpasses;
278 c += layer->len;
279 /* ADD for index Cfr. Marcela --> delta disto by packet */
280 if(image_info && image_info->index_write && image_info->index_on) {
281 opj_tile_info_t *info_TL = &image_info->tile[tileno];
282 opj_packet_info_t *info_PK = &info_TL->packet[image_info->num];
283 info_PK->disto += layer->disto;
284 if (image_info->D_max < info_PK->disto) {
285 image_info->D_max = info_PK->disto;
286 }
287 }
288 /* </ADD> */
289 }
290 }
291
292 return (c - dest);
293}
294
295static void t2_init_seg(opj_tcd_seg_t * seg, int cblksty, int first) {
296 seg->numpasses = 0;
297 seg->len = 0;
298 if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
299 seg->maxpasses = 1;
300 }
301 else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
302 if (first) {
303 seg->maxpasses = 10;
304 } else {
305 seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
306 }
307 } else {
308 seg->maxpasses = 109;
309 }
310}
311
312static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile, opj_tcp_t *tcp, opj_pi_iterator_t *pi) {
313 int bandno, cblkno;
314 unsigned char *c = src;
315
316 opj_cp_t *cp = t2->cp;
317
318 int compno = pi->compno; /* component value */
319 int resno = pi->resno; /* resolution level value */
320 int precno = pi->precno; /* precinct value */
321 int layno = pi->layno; /* quality layer value */
322
323 opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
324 opj_tcd_resolution_t *res = &tilec->resolutions[resno];
325
326 unsigned char *hd = NULL;
327 int present;
328
329 opj_bio_t *bio = NULL; /* BIO component */
330
331 if (layno == 0) {
332 for (bandno = 0; bandno < res->numbands; bandno++) {
333 opj_tcd_band_t *band = &res->bands[bandno];
334 opj_tcd_precinct_t *prc = &band->precincts[precno];
335
336 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
337
338 tgt_reset(prc->incltree);
339 tgt_reset(prc->imsbtree);
340 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
341 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
342 cblk->numsegs = 0;
343 }
344 }
345 }
346
347 /* SOP markers */
348
349 if (tcp->csty & J2K_CP_CSTY_SOP) {
350 if ((*c) != 0xff || (*(c + 1) != 0x91)) {
351 opj_event_msg(t2->cinfo, EVT_WARNING, "Expected SOP marker\n");
352 } else {
353 c += 6;
354 }
355
356 /** TODO : check the Nsop value */
357 }
358
359 /*
360 When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
361 This part deal with this caracteristic
362 step 1: Read packet header in the saved structure
363 step 2: Return to codestream for decoding
364 */
365
366 bio = bio_create();
367
368 if (cp->ppm == 1) { /* PPM */
369 hd = cp->ppm_data;
370 bio_init_dec(bio, hd, cp->ppm_len);
371 } else if (tcp->ppt == 1) { /* PPT */
372 hd = tcp->ppt_data;
373 bio_init_dec(bio, hd, tcp->ppt_len);
374 } else { /* Normal Case */
375 hd = c;
376 bio_init_dec(bio, hd, src+len-hd);
377 }
378
379 present = bio_read(bio, 1);
380
381 if (!present) {
382 bio_inalign(bio);
383 hd += bio_numbytes(bio);
384 bio_destroy(bio);
385
386 /* EPH markers */
387
388 if (tcp->csty & J2K_CP_CSTY_EPH) {
389 if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
390 printf("Error : expected EPH marker\n");
391 } else {
392 hd += 2;
393 }
394 }
395
396 if (cp->ppm == 1) { /* PPM case */
397 cp->ppm_len += cp->ppm_data-hd;
398 cp->ppm_data = hd;
399 return (c - src);
400 }
401 if (tcp->ppt == 1) { /* PPT case */
402 tcp->ppt_len+=tcp->ppt_data-hd;
403 tcp->ppt_data = hd;
404 return (c - src);
405 }
406
407 return (hd - src);
408 }
409
410 for (bandno = 0; bandno < res->numbands; bandno++) {
411 opj_tcd_band_t *band = &res->bands[bandno];
412 opj_tcd_precinct_t *prc = &band->precincts[precno];
413
414 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
415
416 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
417 int included, increment, n;
418 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
419 opj_tcd_seg_t *seg = NULL;
420 /* if cblk not yet included before --> inclusion tagtree */
421 if (!cblk->numsegs) {
422 included = tgt_decode(bio, prc->incltree, cblkno, layno + 1);
423 /* else one bit */
424 } else {
425 included = bio_read(bio, 1);
426 }
427 /* if cblk not included */
428 if (!included) {
429 cblk->numnewpasses = 0;
430 continue;
431 }
432 /* if cblk not yet included --> zero-bitplane tagtree */
433 if (!cblk->numsegs) {
434 int i, numimsbs;
435 for (i = 0; !tgt_decode(bio, prc->imsbtree, cblkno, i); i++) {
436 ;
437 }
438 numimsbs = i - 1;
439 cblk->numbps = band->numbps - numimsbs;
440 cblk->numlenbits = 3;
441 }
442 /* number of coding passes */
443 cblk->numnewpasses = t2_getnumpasses(bio);
444 increment = t2_getcommacode(bio);
445 /* length indicator increment */
446 cblk->numlenbits += increment;
447 if (!cblk->numsegs) {
448 seg = &cblk->segs[0];
449 t2_init_seg(seg, tcp->tccps[compno].cblksty, 1);
450 } else {
451 seg = &cblk->segs[cblk->numsegs - 1];
452 if (seg->numpasses == seg->maxpasses) {
453 t2_init_seg(++seg, tcp->tccps[compno].cblksty, 0);
454 }
455 }
456 n = cblk->numnewpasses;
457
458 do {
459 seg->numnewpasses = int_min(seg->maxpasses - seg->numpasses, n);
460 seg->newlen = bio_read(bio, cblk->numlenbits + int_floorlog2(seg->numnewpasses));
461 n -= seg->numnewpasses;
462 if (n > 0) {
463 t2_init_seg(++seg, tcp->tccps[compno].cblksty, 0);
464 }
465 } while (n > 0);
466 }
467 }
468
469 if (bio_inalign(bio)) {
470 bio_destroy(bio);
471 return -999;
472 }
473
474 hd += bio_numbytes(bio);
475 bio_destroy(bio);
476
477 /* EPH markers */
478 if (tcp->csty & J2K_CP_CSTY_EPH) {
479 if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
480 opj_event_msg(t2->cinfo, EVT_ERROR, "Expected EPH marker\n");
481 } else {
482 hd += 2;
483 }
484 }
485
486 if (cp->ppm==1) {
487 cp->ppm_len+=cp->ppm_data-hd;
488 cp->ppm_data = hd;
489 } else if (tcp->ppt == 1) {
490 tcp->ppt_len+=tcp->ppt_data-hd;
491 tcp->ppt_data = hd;
492 } else {
493 c=hd;
494 }
495
496 for (bandno = 0; bandno < res->numbands; bandno++) {
497 opj_tcd_band_t *band = &res->bands[bandno];
498 opj_tcd_precinct_t *prc = &band->precincts[precno];
499
500 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
501
502 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
503 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
504 opj_tcd_seg_t *seg = NULL;
505 if (!cblk->numnewpasses)
506 continue;
507 if (!cblk->numsegs) {
508 seg = &cblk->segs[0];
509 cblk->numsegs++;
510 cblk->len = 0;
511 } else {
512 seg = &cblk->segs[cblk->numsegs - 1];
513 if (seg->numpasses == seg->maxpasses) {
514 seg++;
515 cblk->numsegs++;
516 }
517 }
518
519 do {
520 if (c + seg->newlen > src + len) {
521 return -999;
522 }
523
524#ifdef USE_JPWL
525 /* we need here a j2k handle to verify if making a check to
526 the validity of cblocks parameters is selected from user (-W) */
527
528 /* let's check that we are not exceeding */
529 if ((cblk->len + seg->newlen) > 8192) {
530 opj_event_msg(t2->cinfo, EVT_WARNING,
531 "JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
532 seg->newlen, cblkno, precno, bandno, resno, compno);
533 if (!JPWL_ASSUME) {
534 opj_event_msg(t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
535 return -999;
536 }
537 seg->newlen = 8192 - cblk->len;
538 opj_event_msg(t2->cinfo, EVT_WARNING, " - truncating segment to %d\n", seg->newlen);
539 break;
540 };
541
542#endif /* USE_JPWL */
543
544 memcpy(cblk->data + cblk->len, c, seg->newlen);
545 if (seg->numpasses == 0) {
546 seg->data = cblk->data + cblk->len;
547 }
548 c += seg->newlen;
549 cblk->len += seg->newlen;
550 seg->len += seg->newlen;
551 seg->numpasses += seg->numnewpasses;
552 cblk->numnewpasses -= seg->numnewpasses;
553 if (cblk->numnewpasses > 0) {
554 seg++;
555 cblk->numsegs++;
556 }
557 } while (cblk->numnewpasses > 0);
558 }
559 }
560
561 return (c - src);
562}
563
564/* ----------------------------------------------------------------------- */
565
566int t2_encode_packets(opj_t2_t* t2,int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_image_info_t *image_info,int tpnum, int tppos,int pino, J2K_T2_MODE t2_mode){
567 unsigned char *c = dest;
568 int e = 0;
569 int compno;
570 int comp_len = 0;
571 opj_pi_iterator_t *pi = NULL;
572 int poc;
573 opj_image_t *image = t2->image;
574 opj_cp_t *cp = t2->cp;
575 int pocno = cp->cinema == CINEMA4K_24? 2: 1;
576 int maxcomp = cp->max_comp_size > 0 ? image->numcomps : 1;
577
578 pi = pi_initialise_encode(image, cp, tileno, t2_mode);
579 if(!pi) {
580 /* TODO: throw an error */
581 return -999;
582 }
583
584 if(image_info) {
585 image_info->num = 0;
586 }
587
588 if(t2_mode == THRESH_CALC ){
589 for(compno = 0; compno < maxcomp; compno++ ){
590 for(poc = 0; poc < pocno ; poc++){
591 int comp_len = 0;
592 int tpnum = compno;
593 pi_create_encode(pi, cp,tileno,poc,tpnum,tppos);
594 while (pi_next(&pi[poc])) {
595 if (pi[poc].layno < maxlayers) {
596 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[poc], c, dest + len - c, image_info, tileno);
597 comp_len = comp_len + e;
598 if (e == -999) {
599 break;
600 } else {
601 c += e;
602 }
603 }
604 }
605 if (e == -999) break;
606 if (cp->max_comp_size){
607 if (comp_len > cp->max_comp_size){
608 e = -999;
609 break;
610 }
611 }
612 }
613 if (e == -999) break;
614 }
615 }else{
616 pi_create_encode(pi, cp,tileno,pino,tpnum,tppos);
617 while (pi_next(&pi[pino])) {
618 if (pi[pino].layno < maxlayers) {
619 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[pino], c, dest + len - c, image_info, tileno);
620 if (e == -999) {
621 break;
622 } else {
623 c += e;
624 }
625 }
626 }
627 }
628
629 /* INDEX >> */
630 if(image_info && image_info->index_on) {
631 if(image_info->index_write) {
632 opj_tile_info_t *info_TL = &image_info->tile[tileno];
633 opj_packet_info_t *info_PK = &info_TL->packet[image_info->num];
634 if (!image_info->num) {
635 info_PK->start_pos = info_TL->end_header + 1;
636 } else {
637 info_PK->start_pos = info_TL->packet[image_info->num - 1].end_pos + 1;
638 }
639 info_PK->end_pos = info_PK->start_pos + e - 1;
640 }
641
642 image_info->num++;
643 }
644 /* << INDEX */
645 pi_destroy(pi, cp, tileno);
646
647 if (e == -999) {
648 return e;
649 }
650
651 return (c - dest);
652}
653
654int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile) {
655 unsigned char *c = src;
656 opj_pi_iterator_t *pi;
657 int pino, e = 0;
658 int n = 0;
659
660 opj_image_t *image = t2->image;
661 opj_cp_t *cp = t2->cp;
662
663 /* create a packet iterator */
664 pi = pi_create_decode(image, cp, tileno);
665 if(!pi) {
666 /* TODO: throw an error */
667 return -999;
668 }
669
670 for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) {
671 while (pi_next(&pi[pino])) {
672 if ((cp->layer==0) || (cp->layer>=((pi[pino].layno)+1))) {
673 e = t2_decode_packet(t2, c, src + len - c, tile, &cp->tcps[tileno], &pi[pino]);
674 } else {
675 e = 0;
676 }
677
678 /* progression in resolution */
679 image->comps[pi[pino].compno].resno_decoded =
680 (e > 0) ?
681 int_max(pi[pino].resno, image->comps[pi[pino].compno].resno_decoded)
682 : image->comps[pi[pino].compno].resno_decoded;
683 n++;
684
685 if (e == -999) { /* ADD */
686 break;
687 } else {
688 c += e;
689 }
690 }
691 }
692
693 /* don't forget to release pi */
694 pi_destroy(pi, cp, tileno);
695
696 if (e == -999) {
697 return e;
698 }
699
700 return (c - src);
701}
702
703/* ----------------------------------------------------------------------- */
704
705opj_t2_t* t2_create(opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp) {
706 /* create the tcd structure */
707 opj_t2_t *t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
708 if(!t2) return NULL;
709 t2->cinfo = cinfo;
710 t2->image = image;
711 t2->cp = cp;
712
713 return t2;
714}
715
716void t2_destroy(opj_t2_t *t2) {
717 if(t2) {
718 opj_free(t2);
719 }
720}
721
generated by cgit v1.1 at 2024-12-24 04:45:45 +0000