Libav
jpeg2000dec.c
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1 /*
2  * JPEG 2000 image decoder
3  * Copyright (c) 2007 Kamil Nowosad
4  * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
28 #include <inttypes.h>
29 
30 #include "libavutil/attributes.h"
31 #include "libavutil/common.h"
32 #include "libavutil/opt.h"
33 #include "avcodec.h"
34 #include "bytestream.h"
35 #include "internal.h"
36 #include "thread.h"
37 #include "jpeg2000.h"
38 #include "jpeg2000dsp.h"
39 #include "profiles.h"
40 
41 #define JP2_SIG_TYPE 0x6A502020
42 #define JP2_SIG_VALUE 0x0D0A870A
43 #define JP2_CODESTREAM 0x6A703263
44 
45 #define HAD_COC 0x01
46 #define HAD_QCC 0x02
47 
48 typedef struct Jpeg2000TilePart {
49  uint8_t tile_index; // Tile index who refers the tile-part
50  const uint8_t *tp_end;
51  GetByteContext tpg; // bit stream in tile-part
53 
54 /* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
55  * one per component, so tile_part elements have a size of 3 */
56 typedef struct Jpeg2000Tile {
58  uint8_t properties[4];
60  Jpeg2000QuantStyle qntsty[4];
61  Jpeg2000TilePart tile_part[3];
62  uint16_t tp_idx; // Tile-part index
63 } Jpeg2000Tile;
64 
65 typedef struct Jpeg2000DecoderContext {
66  AVClass *class;
69 
70  int width, height;
71  int image_offset_x, image_offset_y;
72  int tile_offset_x, tile_offset_y;
73  uint8_t cbps[4]; // bits per sample in particular components
74  uint8_t sgnd[4]; // if a component is signed
75  uint8_t properties[4];
76  int cdx[4], cdy[4];
77  int precision;
79  int tile_width, tile_height;
80  unsigned numXtiles, numYtiles;
82 
84  Jpeg2000QuantStyle qntsty[4];
85 
86  int bit_index;
87 
88  int16_t curtileno;
91 
92  /*options parameters*/
95 
96 /* get_bits functions for JPEG2000 packet bitstream
97  * It is a get_bit function with a bit-stuffing routine. If the value of the
98  * byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB.
99  * cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */
100 static int get_bits(Jpeg2000DecoderContext *s, int n)
101 {
102  int res = 0;
103  while (--n >= 0) {
104  res <<= 1;
105  if (s->bit_index == 0) {
106  s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);
107  }
108  s->bit_index--;
109  res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;
110  }
111  return res;
112 }
113 
115 {
116  if (bytestream2_get_byte(&s->g) == 0xff)
117  bytestream2_skip(&s->g, 1);
118  s->bit_index = 8;
119 }
120 
121 /* decode the value stored in node */
123  int threshold)
124 {
125  Jpeg2000TgtNode *stack[30];
126  int sp = -1, curval = 0;
127 
128  if (!node)
129  return AVERROR_INVALIDDATA;
130 
131  while (node && !node->vis) {
132  stack[++sp] = node;
133  node = node->parent;
134  }
135 
136  if (node)
137  curval = node->val;
138  else
139  curval = stack[sp]->val;
140 
141  while (curval < threshold && sp >= 0) {
142  if (curval < stack[sp]->val)
143  curval = stack[sp]->val;
144  while (curval < threshold) {
145  int ret;
146  if ((ret = get_bits(s, 1)) > 0) {
147  stack[sp]->vis++;
148  break;
149  } else if (!ret)
150  curval++;
151  else
152  return ret;
153  }
154  stack[sp]->val = curval;
155  sp--;
156  }
157  return curval;
158 }
159 
160 /* marker segments */
161 /* get sizes and offsets of image, tiles; number of components */
163 {
164  int i;
165  int ncomponents;
166 
167  if (bytestream2_get_bytes_left(&s->g) < 36)
168  return AVERROR_INVALIDDATA;
169 
170  s->avctx->profile = bytestream2_get_be16u(&s->g); // Rsiz
171  s->width = bytestream2_get_be32u(&s->g); // Width
172  s->height = bytestream2_get_be32u(&s->g); // Height
173  s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz
174  s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz
175  s->tile_width = bytestream2_get_be32u(&s->g); // XTSiz
176  s->tile_height = bytestream2_get_be32u(&s->g); // YTSiz
177  s->tile_offset_x = bytestream2_get_be32u(&s->g); // XT0Siz
178  s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz
179  ncomponents = bytestream2_get_be16u(&s->g); // CSiz
180 
181  if (ncomponents <= 0) {
182  av_log(s->avctx, AV_LOG_ERROR, "Invalid number of components: %d\n",
183  s->ncomponents);
184  return AVERROR_INVALIDDATA;
185  }
186 
187  if (ncomponents > 4) {
188  avpriv_request_sample(s->avctx, "Support for %d components",
189  s->ncomponents);
190  return AVERROR_PATCHWELCOME;
191  }
192 
193  s->ncomponents = ncomponents;
194 
195  if (s->tile_width <= 0 || s->tile_height <= 0 ||
196  s->tile_width > s->width || s->tile_height > s->height) {
197  av_log(s->avctx, AV_LOG_ERROR, "Invalid tile dimension %dx%d.\n",
198  s->tile_width, s->tile_height);
199  return AVERROR_INVALIDDATA;
200  }
201 
202  if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents)
203  return AVERROR_INVALIDDATA;
204 
205  for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
206  uint8_t x = bytestream2_get_byteu(&s->g);
207  s->cbps[i] = (x & 0x7f) + 1;
208  s->precision = FFMAX(s->cbps[i], s->precision);
209  s->sgnd[i] = !!(x & 0x80);
210  s->cdx[i] = bytestream2_get_byteu(&s->g);
211  s->cdy[i] = bytestream2_get_byteu(&s->g);
212 
213  if (s->cdx[i] != 1 || s->cdy[i] != 1) {
215  "CDxy values %d %d for component %d",
216  s->cdx[i], s->cdy[i], i);
217  if (!s->cdx[i] || !s->cdy[i])
218  return AVERROR_INVALIDDATA;
219  else
220  return AVERROR_PATCHWELCOME;
221  }
222  }
223 
226 
227  s->tile = av_mallocz_array(s->numXtiles * s->numYtiles, sizeof(*s->tile));
228  if (!s->tile) {
229  s->numXtiles = s->numYtiles = 0;
230  return AVERROR(ENOMEM);
231  }
232 
233  for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
234  Jpeg2000Tile *tile = s->tile + i;
235 
236  tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
237  if (!tile->comp)
238  return AVERROR(ENOMEM);
239  }
240 
241  /* compute image size with reduction factor */
243  s->reduction_factor);
245  s->reduction_factor);
246 
247  switch (s->ncomponents) {
248  case 1:
249  if (s->precision > 8)
251  else
253  break;
254  case 3:
255  switch (s->avctx->profile) {
258  /* XYZ color-space for digital cinema profiles */
260  break;
261  default:
262  if (s->precision > 8)
264  else
266  break;
267  }
268  break;
269  case 4:
271  break;
272  default:
273  /* pixel format can not be identified */
275  break;
276  }
277  return 0;
278 }
279 
280 /* get common part for COD and COC segments */
282 {
283  uint8_t byte;
284 
285  if (bytestream2_get_bytes_left(&s->g) < 5)
286  return AVERROR_INVALIDDATA;
287 
288  /* nreslevels = number of resolution levels
289  = number of decomposition level +1 */
290  c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
291 
293  return AVERROR_INVALIDDATA;
294 
295  /* compute number of resolution levels to decode */
296  if (c->nreslevels < s->reduction_factor)
297  c->nreslevels2decode = 1;
298  else
300 
301  c->log2_cblk_width = bytestream2_get_byteu(&s->g) + 2; // cblk width
302  c->log2_cblk_height = bytestream2_get_byteu(&s->g) + 2; // cblk height
303 
304  if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
305  c->log2_cblk_width + c->log2_cblk_height > 12) {
306  av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
307  return AVERROR_INVALIDDATA;
308  }
309 
310  c->cblk_style = bytestream2_get_byteu(&s->g);
311  if (c->cblk_style != 0) { // cblk style
312  avpriv_request_sample(s->avctx, "Support for extra cblk styles");
313  return AVERROR_PATCHWELCOME;
314  }
315  c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
316  /* set integer 9/7 DWT in case of BITEXACT flag */
317  if ((s->avctx->flags & AV_CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
318  c->transform = FF_DWT97_INT;
319 
320  if (c->csty & JPEG2000_CSTY_PREC) {
321  int i;
322  for (i = 0; i < c->nreslevels; i++) {
323  byte = bytestream2_get_byte(&s->g);
324  c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
325  c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
326  }
327  } else {
328  memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
329  memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
330  }
331  return 0;
332 }
333 
334 /* get coding parameters for a particular tile or whole image*/
336  uint8_t *properties)
337 {
339  int compno, ret;
340 
341  if (bytestream2_get_bytes_left(&s->g) < 5)
342  return AVERROR_INVALIDDATA;
343 
344  tmp.csty = bytestream2_get_byteu(&s->g);
345 
346  // get progression order
347  tmp.prog_order = bytestream2_get_byteu(&s->g);
348 
349  tmp.nlayers = bytestream2_get_be16u(&s->g);
350  tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
351 
352  if (tmp.mct && s->ncomponents < 3) {
354  "MCT %"PRIu8" with too few components (%d)\n",
355  tmp.mct, s->ncomponents);
356  return AVERROR_INVALIDDATA;
357  }
358 
359  if ((ret = get_cox(s, &tmp)) < 0)
360  return ret;
361 
362  for (compno = 0; compno < s->ncomponents; compno++)
363  if (!(properties[compno] & HAD_COC))
364  memcpy(c + compno, &tmp, sizeof(tmp));
365  return 0;
366 }
367 
368 /* Get coding parameters for a component in the whole image or a
369  * particular tile. */
371  uint8_t *properties)
372 {
373  int compno, ret;
374 
375  if (bytestream2_get_bytes_left(&s->g) < 2)
376  return AVERROR_INVALIDDATA;
377 
378  compno = bytestream2_get_byteu(&s->g);
379 
380  if (compno >= s->ncomponents) {
382  "Invalid compno %d. There are %d components in the image.\n",
383  compno, s->ncomponents);
384  return AVERROR_INVALIDDATA;
385  }
386 
387  c += compno;
388  c->csty = bytestream2_get_byteu(&s->g);
389 
390  if ((ret = get_cox(s, c)) < 0)
391  return ret;
392 
393  properties[compno] |= HAD_COC;
394  return 0;
395 }
396 
397 /* Get common part for QCD and QCC segments. */
399 {
400  int i, x;
401 
402  if (bytestream2_get_bytes_left(&s->g) < 1)
403  return AVERROR_INVALIDDATA;
404 
405  x = bytestream2_get_byteu(&s->g); // Sqcd
406 
407  q->nguardbits = x >> 5;
408  q->quantsty = x & 0x1f;
409 
410  if (q->quantsty == JPEG2000_QSTY_NONE) {
411  n -= 3;
412  if (bytestream2_get_bytes_left(&s->g) < n ||
414  return AVERROR_INVALIDDATA;
415  for (i = 0; i < n; i++)
416  q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
417  } else if (q->quantsty == JPEG2000_QSTY_SI) {
418  if (bytestream2_get_bytes_left(&s->g) < 2)
419  return AVERROR_INVALIDDATA;
420  x = bytestream2_get_be16u(&s->g);
421  q->expn[0] = x >> 11;
422  q->mant[0] = x & 0x7ff;
423  for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
424  int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
425  q->expn[i] = curexpn;
426  q->mant[i] = q->mant[0];
427  }
428  } else {
429  n = (n - 3) >> 1;
430  if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
432  return AVERROR_INVALIDDATA;
433  for (i = 0; i < n; i++) {
434  x = bytestream2_get_be16u(&s->g);
435  q->expn[i] = x >> 11;
436  q->mant[i] = x & 0x7ff;
437  }
438  }
439  return 0;
440 }
441 
442 /* Get quantization parameters for a particular tile or a whole image. */
444  uint8_t *properties)
445 {
447  int compno, ret;
448 
449  if ((ret = get_qcx(s, n, &tmp)) < 0)
450  return ret;
451  for (compno = 0; compno < s->ncomponents; compno++)
452  if (!(properties[compno] & HAD_QCC))
453  memcpy(q + compno, &tmp, sizeof(tmp));
454  return 0;
455 }
456 
457 /* Get quantization parameters for a component in the whole image
458  * on in a particular tile. */
460  uint8_t *properties)
461 {
462  int compno;
463 
464  if (bytestream2_get_bytes_left(&s->g) < 1)
465  return AVERROR_INVALIDDATA;
466 
467  compno = bytestream2_get_byteu(&s->g);
468 
469  if (compno >= s->ncomponents) {
471  "Invalid compno %d. There are %d components in the image.\n",
472  compno, s->ncomponents);
473  return AVERROR_INVALIDDATA;
474  }
475 
476  properties[compno] |= HAD_QCC;
477  return get_qcx(s, n - 1, q + compno);
478 }
479 
480 /* Get start of tile segment. */
481 static int get_sot(Jpeg2000DecoderContext *s, int n)
482 {
483  Jpeg2000TilePart *tp;
484  uint16_t Isot;
485  uint32_t Psot;
486  uint8_t TPsot;
487 
488  if (bytestream2_get_bytes_left(&s->g) < 8)
489  return AVERROR_INVALIDDATA;
490 
491  Isot = bytestream2_get_be16u(&s->g); // Isot
492  if (Isot >= s->numXtiles * s->numYtiles)
493  return AVERROR_INVALIDDATA;
494 
495  if (Isot) {
496  avpriv_request_sample(s->avctx, "Support for more than one tile");
497  return AVERROR_PATCHWELCOME;
498  }
499  Psot = bytestream2_get_be32u(&s->g); // Psot
500  TPsot = bytestream2_get_byteu(&s->g); // TPsot
501 
502  /* Read TNSot but not used */
503  bytestream2_get_byteu(&s->g); // TNsot
504 
505  if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
506  av_log(s->avctx, AV_LOG_ERROR, "Psot %"PRIu32" too big\n", Psot);
507  return AVERROR_INVALIDDATA;
508  }
509 
510  if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) {
511  avpriv_request_sample(s->avctx, "Support for %"PRIu8" components", TPsot);
512  return AVERROR_PATCHWELCOME;
513  }
514 
515  s->tile[Isot].tp_idx = TPsot;
516  tp = s->tile[Isot].tile_part + TPsot;
517  tp->tile_index = Isot;
518  tp->tp_end = s->g.buffer + Psot - n - 2;
519 
520  if (!TPsot) {
521  Jpeg2000Tile *tile = s->tile + s->curtileno;
522 
523  /* copy defaults */
524  memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));
525  memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));
526  }
527 
528  return 0;
529 }
530 
531 /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
532  * Used to know the number of tile parts and lengths.
533  * There may be multiple TLMs in the header.
534  * TODO: The function is not used for tile-parts management, nor anywhere else.
535  * It can be useful to allocate memory for tile parts, before managing the SOT
536  * markers. Parsing the TLM header is needed to increment the input header
537  * buffer.
538  * This marker is mandatory for DCI. */
540 {
541  uint8_t Stlm, ST, SP, tile_tlm, i;
542  bytestream2_get_byte(&s->g); /* Ztlm: skipped */
543  Stlm = bytestream2_get_byte(&s->g);
544 
545  // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
546  ST = (Stlm >> 4) & 0x03;
547  // TODO: Manage case of ST = 0b11 --> raise error
548  SP = (Stlm >> 6) & 0x01;
549  tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
550  for (i = 0; i < tile_tlm; i++) {
551  switch (ST) {
552  case 0:
553  break;
554  case 1:
555  bytestream2_get_byte(&s->g);
556  break;
557  case 2:
558  bytestream2_get_be16(&s->g);
559  break;
560  case 3:
561  bytestream2_get_be32(&s->g);
562  break;
563  }
564  if (SP == 0) {
565  bytestream2_get_be16(&s->g);
566  } else {
567  bytestream2_get_be32(&s->g);
568  }
569  }
570  return 0;
571 }
572 
573 static int init_tile(Jpeg2000DecoderContext *s, int tileno)
574 {
575  int compno;
576  int tilex = tileno % s->numXtiles;
577  int tiley = tileno / s->numXtiles;
578  Jpeg2000Tile *tile = s->tile + tileno;
579 
580  if (!tile->comp)
581  return AVERROR(ENOMEM);
582 
583  for (compno = 0; compno < s->ncomponents; compno++) {
584  Jpeg2000Component *comp = tile->comp + compno;
585  Jpeg2000CodingStyle *codsty = tile->codsty + compno;
586  Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
587  int ret; // global bandno
588 
589  comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
590  comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
591  comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
592  comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
593 
594  comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
595  comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
596  comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
597  comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
598 
599  if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
600  s->cbps[compno], s->cdx[compno],
601  s->cdy[compno], s->avctx))
602  return ret;
603  }
604  return 0;
605 }
606 
607 /* Read the number of coding passes. */
609 {
610  int num;
611  if (!get_bits(s, 1))
612  return 1;
613  if (!get_bits(s, 1))
614  return 2;
615  if ((num = get_bits(s, 2)) != 3)
616  return num < 0 ? num : 3 + num;
617  if ((num = get_bits(s, 5)) != 31)
618  return num < 0 ? num : 6 + num;
619  num = get_bits(s, 7);
620  return num < 0 ? num : 37 + num;
621 }
622 
624 {
625  int res = 0, ret;
626  while (ret = get_bits(s, 1)) {
627  if (ret < 0)
628  return ret;
629  res++;
630  }
631  return res;
632 }
633 
635  Jpeg2000CodingStyle *codsty,
636  Jpeg2000ResLevel *rlevel, int precno,
637  int layno, uint8_t *expn, int numgbits)
638 {
639  int bandno, cblkno, ret, nb_code_blocks;
640 
641  if (!(ret = get_bits(s, 1))) {
642  jpeg2000_flush(s);
643  return 0;
644  } else if (ret < 0)
645  return ret;
646 
647  for (bandno = 0; bandno < rlevel->nbands; bandno++) {
648  Jpeg2000Band *band = rlevel->band + bandno;
649  Jpeg2000Prec *prec = band->prec + precno;
650 
651  if (band->coord[0][0] == band->coord[0][1] ||
652  band->coord[1][0] == band->coord[1][1])
653  continue;
654  nb_code_blocks = prec->nb_codeblocks_height *
655  prec->nb_codeblocks_width;
656  for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
657  Jpeg2000Cblk *cblk = prec->cblk + cblkno;
658  int incl, newpasses, llen;
659 
660  if (cblk->npasses)
661  incl = get_bits(s, 1);
662  else
663  incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
664  if (!incl)
665  continue;
666  else if (incl < 0)
667  return incl;
668 
669  if (!cblk->npasses) {
670  int v = expn[bandno] + numgbits - 1 -
671  tag_tree_decode(s, prec->zerobits + cblkno, 100);
672  if (v < 0) {
674  "nonzerobits %d invalid\n", v);
675  return AVERROR_INVALIDDATA;
676  }
677  cblk->nonzerobits = v;
678  }
679  if ((newpasses = getnpasses(s)) < 0)
680  return newpasses;
681  if ((llen = getlblockinc(s)) < 0)
682  return llen;
683  cblk->lblock += llen;
684  if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
685  return ret;
686  if (ret > sizeof(cblk->data)) {
688  "Block with lengthinc greater than %zu",
689  sizeof(cblk->data));
690  return AVERROR_PATCHWELCOME;
691  }
692  cblk->lengthinc = ret;
693  cblk->npasses += newpasses;
694  }
695  }
696  jpeg2000_flush(s);
697 
698  if (codsty->csty & JPEG2000_CSTY_EPH) {
699  if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
700  bytestream2_skip(&s->g, 2);
701  else
702  av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
703  }
704 
705  for (bandno = 0; bandno < rlevel->nbands; bandno++) {
706  Jpeg2000Band *band = rlevel->band + bandno;
707  Jpeg2000Prec *prec = band->prec + precno;
708 
709  nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
710  for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
711  Jpeg2000Cblk *cblk = prec->cblk + cblkno;
712  if (bytestream2_get_bytes_left(&s->g) < cblk->lengthinc)
713  return AVERROR_INVALIDDATA;
714  /* Code-block data can be empty. In that case initialize data
715  * with 0xFFFF. */
716  if (cblk->lengthinc > 0) {
717  bytestream2_get_bufferu(&s->g, cblk->data, cblk->lengthinc);
718  } else {
719  cblk->data[0] = 0xFF;
720  cblk->data[1] = 0xFF;
721  }
722  cblk->length += cblk->lengthinc;
723  cblk->lengthinc = 0;
724 
725  if (cblk->length > sizeof(cblk->data)) {
727  "Block length %"PRIu16" > data size %zd\n",
728  cblk->length, sizeof(cblk->data));
729  return AVERROR_INVALIDDATA;
730  }
731  }
732  }
733  return 0;
734 }
735 
737 {
738  int layno, reslevelno, compno, precno, ok_reslevel;
739  int ret;
740 
741  for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
742  ok_reslevel = 1;
743  for (reslevelno = 0; ok_reslevel; reslevelno++) {
744  ok_reslevel = 0;
745  for (compno = 0; compno < s->ncomponents; compno++) {
746  Jpeg2000CodingStyle *codsty = tile->codsty + compno;
747  Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
748  if (reslevelno < codsty->nreslevels) {
749  Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
750  reslevelno;
751  ok_reslevel = 1;
752  for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
753  if ((ret = jpeg2000_decode_packet(s,
754  codsty, rlevel,
755  precno, layno,
756  qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
757  qntsty->nguardbits)) < 0)
758  return ret;
759  }
760  }
761  }
762  }
763 
764  return 0;
765 }
766 
768 {
769  int layno, reslevelno, compno, precno;
770  int ret, x, y;
771 
772  for (compno = 0; compno < s->ncomponents; compno++) {
773  Jpeg2000CodingStyle *codsty = tile->codsty + compno;
774  Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
775 
776  /* Set bit stream buffer address according to tile-part.
777  * For DCinema one tile-part per component, so can be
778  * indexed by component. */
779  s->g = tile->tile_part[compno].tpg;
780 
781  /* Position loop (y axis)
782  * TODO: Automate computing of step 256.
783  * Fixed here, but to be computed before entering here. */
784  for (y = 0; y < s->height; y += 256) {
785  /* Position loop (y axis)
786  * TODO: automate computing of step 256.
787  * Fixed here, but to be computed before entering here. */
788  for (x = 0; x < s->width; x += 256) {
789  for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
790  uint16_t prcx, prcy;
791  uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
792  Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
793 
794  if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
795  (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
796  continue;
797 
798  if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
799  (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
800  continue;
801 
802  // check if a precinct exists
803  prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
804  prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
805  precno = prcx + rlevel->num_precincts_x * prcy;
806  for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
807  if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
808  precno, layno,
809  qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
810  qntsty->nguardbits)) < 0)
811  return ret;
812  }
813  }
814  }
815  }
816  }
817 
818  return 0;
819 }
820 
822 {
823  int ret = 0;
824 
825  s->bit_index = 8;
826  switch (tile->codsty[0].prog_order) {
827  case JPEG2000_PGOD_LRCP:
828  ret = decode_pgod_lrcp(s, tile);
829  break;
830 
831  case JPEG2000_PGOD_CPRL:
832  ret = decode_pgod_cprl(s, tile);
833  break;
834 
835  case JPEG2000_PGOD_RLCP:
836  avpriv_request_sample(s->avctx, "Progression order RLCP");
837  ret = AVERROR_PATCHWELCOME;
838  break;
839 
840  case JPEG2000_PGOD_RPCL:
841  avpriv_request_sample(s->avctx, "Progression order RPCL");
842  ret = AVERROR_PATCHWELCOME;
843  break;
844 
845  case JPEG2000_PGOD_PCRL:
846  avpriv_request_sample(s->avctx, "Progression order PCRL");
847  ret = AVERROR_PATCHWELCOME;
848  break;
849 
850  default:
851  break;
852  }
853 
854  /* EOC marker reached */
855  bytestream2_skip(&s->g, 2);
856 
857  return ret;
858 }
859 
860 /* TIER-1 routines */
861 static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
862  int bpno, int bandno, int bpass_csty_symbol,
863  int vert_causal_ctx_csty_symbol)
864 {
865  int mask = 3 << (bpno - 1), y0, x, y;
866 
867  for (y0 = 0; y0 < height; y0 += 4)
868  for (x = 0; x < width; x++)
869  for (y = y0; y < height && y < y0 + 4; y++) {
870  if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
871  && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
872  int flags_mask = -1;
873  if (vert_causal_ctx_csty_symbol && y == y0 + 3)
875  if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {
876  int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
877  if (bpass_csty_symbol)
878  t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
879  else
880  t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
881  -mask : mask;
882 
884  t1->data[y][x] < 0);
885  }
886  t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
887  }
888  }
889 }
890 
891 static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
892  int bpno)
893 {
894  int phalf, nhalf;
895  int y0, x, y;
896 
897  phalf = 1 << (bpno - 1);
898  nhalf = -phalf;
899 
900  for (y0 = 0; y0 < height; y0 += 4)
901  for (x = 0; x < width; x++)
902  for (y = y0; y < height && y < y0 + 4; y++)
903  if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
904  int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
905  int r = ff_mqc_decode(&t1->mqc,
906  t1->mqc.cx_states + ctxno)
907  ? phalf : nhalf;
908  t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
909  t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
910  }
911 }
912 
914  int width, int height, int bpno, int bandno,
915  int seg_symbols, int vert_causal_ctx_csty_symbol)
916 {
917  int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
918 
919  for (y0 = 0; y0 < height; y0 += 4) {
920  for (x = 0; x < width; x++) {
921  if (y0 + 3 < height &&
922  !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
923  (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
924  (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
925  (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
926  if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
927  continue;
928  runlen = ff_mqc_decode(&t1->mqc,
929  t1->mqc.cx_states + MQC_CX_UNI);
930  runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
931  t1->mqc.cx_states +
932  MQC_CX_UNI);
933  dec = 1;
934  } else {
935  runlen = 0;
936  dec = 0;
937  }
938 
939  for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
940  if (!dec) {
941  if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
942  int flags_mask = -1;
943  if (vert_causal_ctx_csty_symbol && y == y0 + 3)
945  dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,
946  bandno));
947  }
948  }
949  if (dec) {
950  int xorbit;
951  int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
952  &xorbit);
953  t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
954  t1->mqc.cx_states + ctxno) ^
955  xorbit)
956  ? -mask : mask;
957  ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
958  }
959  dec = 0;
960  t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
961  }
962  }
963  }
964  if (seg_symbols) {
965  int val;
966  val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
967  val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
968  val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
969  val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
970  if (val != 0xa)
972  "Segmentation symbol value incorrect\n");
973  }
974 }
975 
977  Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
978  int width, int height, int bandpos)
979 {
980  int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
981  int clnpass_cnt = 0;
982  int bpass_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_BYPASS;
983  int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC;
984 
985  for (y = 0; y < height; y++)
986  memset(t1->data[y], 0, width * sizeof(**t1->data));
987 
988  /* If code-block contains no compressed data: nothing to do. */
989  if (!cblk->length)
990  return 0;
991  for (y = 0; y < height + 2; y++)
992  memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags));
993 
994  ff_mqc_initdec(&t1->mqc, cblk->data);
995  cblk->data[cblk->length] = 0xff;
996  cblk->data[cblk->length + 1] = 0xff;
997 
998  while (passno--) {
999  switch (pass_t) {
1000  case 0:
1001  decode_sigpass(t1, width, height, bpno + 1, bandpos,
1002  bpass_csty_symbol && (clnpass_cnt >= 4),
1003  vert_causal_ctx_csty_symbol);
1004  break;
1005  case 1:
1006  decode_refpass(t1, width, height, bpno + 1);
1007  if (bpass_csty_symbol && clnpass_cnt >= 4)
1008  ff_mqc_initdec(&t1->mqc, cblk->data);
1009  break;
1010  case 2:
1011  decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
1012  codsty->cblk_style & JPEG2000_CBLK_SEGSYM,
1013  vert_causal_ctx_csty_symbol);
1014  clnpass_cnt = clnpass_cnt + 1;
1015  if (bpass_csty_symbol && clnpass_cnt >= 4)
1016  ff_mqc_initdec(&t1->mqc, cblk->data);
1017  break;
1018  }
1019 
1020  pass_t++;
1021  if (pass_t == 3) {
1022  bpno--;
1023  pass_t = 0;
1024  }
1025  }
1026  return 0;
1027 }
1028 
1029 /* TODO: Verify dequantization for lossless case
1030  * comp->data can be float or int
1031  * band->stepsize can be float or int
1032  * depending on the type of DWT transformation.
1033  * see ISO/IEC 15444-1:2002 A.6.1 */
1034 
1035 /* Float dequantization of a codeblock.*/
1036 static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
1038  Jpeg2000T1Context *t1, Jpeg2000Band *band)
1039 {
1040  int i, j;
1041  int w = cblk->coord[0][1] - cblk->coord[0][0];
1042  for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1043  float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1044  int *src = t1->data[j];
1045  for (i = 0; i < w; ++i)
1046  datap[i] = src[i] * band->f_stepsize;
1047  }
1048 }
1049 
1050 /* Integer dequantization of a codeblock.*/
1051 static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
1053  Jpeg2000T1Context *t1, Jpeg2000Band *band)
1054 {
1055  int i, j;
1056  int w = cblk->coord[0][1] - cblk->coord[0][0];
1057  for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1058  int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1059  int *src = t1->data[j];
1060  for (i = 0; i < w; ++i)
1061  datap[i] = (src[i] * band->i_stepsize + (1 << 15)) >> 16;
1062  }
1063 }
1064 
1065 static inline void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
1066 {
1067  int i, csize = 1;
1068  void *src[3];
1069 
1070  for (i = 0; i < 3; i++)
1071  if (tile->codsty[0].transform == FF_DWT97)
1072  src[i] = tile->comp[i].f_data;
1073  else
1074  src[i] = tile->comp[i].i_data;
1075 
1076  for (i = 0; i < 2; i++)
1077  csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
1078 
1079  s->dsp.mct_decode[tile->codsty[0].transform](src[0], src[1], src[2], csize);
1080 }
1081 
1083 {
1084  Jpeg2000T1Context t1;
1085 
1086  int compno, reslevelno, bandno;
1087 
1088  /* Loop on tile components */
1089 
1090  for (compno = 0; compno < s->ncomponents; compno++) {
1091  Jpeg2000Component *comp = tile->comp + compno;
1092  Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1093  /* Loop on resolution levels */
1094  for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1095  Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1096  /* Loop on bands */
1097  for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1098  uint16_t nb_precincts, precno;
1099  Jpeg2000Band *band = rlevel->band + bandno;
1100  int cblkno = 0, bandpos;
1101  bandpos = bandno + (reslevelno > 0);
1102 
1103  if (band->coord[0][0] == band->coord[0][1] ||
1104  band->coord[1][0] == band->coord[1][1])
1105  continue;
1106 
1107  nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1108  /* Loop on precincts */
1109  for (precno = 0; precno < nb_precincts; precno++) {
1110  Jpeg2000Prec *prec = band->prec + precno;
1111 
1112  /* Loop on codeblocks */
1113  for (cblkno = 0;
1114  cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height;
1115  cblkno++) {
1116  int x, y;
1117  Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1118  decode_cblk(s, codsty, &t1, cblk,
1119  cblk->coord[0][1] - cblk->coord[0][0],
1120  cblk->coord[1][1] - cblk->coord[1][0],
1121  bandpos);
1122 
1123  x = cblk->coord[0][0];
1124  y = cblk->coord[1][0];
1125 
1126  if (codsty->transform == FF_DWT97)
1127  dequantization_float(x, y, cblk, comp, &t1, band);
1128  else
1129  dequantization_int(x, y, cblk, comp, &t1, band);
1130  } /* end cblk */
1131  } /*end prec */
1132  } /* end band */
1133  } /* end reslevel */
1134 
1135  /* inverse DWT */
1136  ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data);
1137  } /*end comp */
1138 }
1139 
1140 #define WRITE_FRAME(D, PIXEL) \
1141  static inline void write_frame_ ## D(Jpeg2000DecoderContext * s, Jpeg2000Tile * tile, \
1142  AVFrame * picture) \
1143  { \
1144  int linesize = picture->linesize[0] / sizeof(PIXEL); \
1145  int compno; \
1146  int x, y; \
1147  \
1148  for (compno = 0; compno < s->ncomponents; compno++) { \
1149  Jpeg2000Component *comp = tile->comp + compno; \
1150  Jpeg2000CodingStyle *codsty = tile->codsty + compno; \
1151  PIXEL *line; \
1152  float *datap = comp->f_data; \
1153  int32_t *i_datap = comp->i_data; \
1154  int cbps = s->cbps[compno]; \
1155  int w = tile->comp[compno].coord[0][1] - s->image_offset_x; \
1156  \
1157  y = tile->comp[compno].coord[1][0] - s->image_offset_y; \
1158  line = (PIXEL *)picture->data[0] + y * linesize; \
1159  for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) { \
1160  PIXEL *dst; \
1161  \
1162  x = tile->comp[compno].coord[0][0] - s->image_offset_x; \
1163  dst = line + x * s->ncomponents + compno; \
1164  \
1165  if (codsty->transform == FF_DWT97) { \
1166  for (; x < w; x += s->cdx[compno]) { \
1167  int val = lrintf(*datap) + (1 << (cbps - 1)); \
1168  /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ \
1169  val = av_clip(val, 0, (1 << cbps) - 1); \
1170  *dst = val << (8 * sizeof(PIXEL) - cbps); \
1171  datap++; \
1172  dst += s->ncomponents; \
1173  } \
1174  } else { \
1175  for (; x < w; x += s->cdx[compno]) { \
1176  int val = *i_datap + (1 << (cbps - 1)); \
1177  /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ \
1178  val = av_clip(val, 0, (1 << cbps) - 1); \
1179  *dst = val << (8 * sizeof(PIXEL) - cbps); \
1180  i_datap++; \
1181  dst += s->ncomponents; \
1182  } \
1183  } \
1184  line += linesize; \
1185  } \
1186  } \
1187  \
1188  }
1189 
1190 WRITE_FRAME(8, uint8_t)
1191 WRITE_FRAME(16, uint16_t)
1192 
1193 #undef WRITE_FRAME
1194 
1196  AVFrame *picture)
1197 {
1198  tile_codeblocks(s, tile);
1199 
1200  /* inverse MCT transformation */
1201  if (tile->codsty[0].mct)
1202  mct_decode(s, tile);
1203 
1204  if (s->precision <= 8) {
1205  write_frame_8(s, tile, picture);
1206  } else {
1207  write_frame_16(s, tile, picture);
1208  }
1209 
1210  return 0;
1211 }
1212 
1214 {
1215  int tileno, compno;
1216  for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1217  for (compno = 0; compno < s->ncomponents; compno++) {
1218  Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1219  Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1220 
1221  ff_jpeg2000_cleanup(comp, codsty);
1222  }
1223  av_freep(&s->tile[tileno].comp);
1224  }
1225  av_freep(&s->tile);
1226  s->numXtiles = s->numYtiles = 0;
1227 }
1228 
1230 {
1231  Jpeg2000CodingStyle *codsty = s->codsty;
1232  Jpeg2000QuantStyle *qntsty = s->qntsty;
1233  uint8_t *properties = s->properties;
1234 
1235  for (;;) {
1236  int len, ret = 0;
1237  uint16_t marker;
1238  int oldpos;
1239 
1240  if (bytestream2_get_bytes_left(&s->g) < 2) {
1241  av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1242  break;
1243  }
1244 
1245  marker = bytestream2_get_be16u(&s->g);
1246  oldpos = bytestream2_tell(&s->g);
1247 
1248  if (marker == JPEG2000_SOD) {
1249  Jpeg2000Tile *tile;
1250  Jpeg2000TilePart *tp;
1251 
1252  if (s->curtileno < 0) {
1253  av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n");
1254  return AVERROR_INVALIDDATA;
1255  }
1256  if (!s->tile) {
1257  av_log(s->avctx, AV_LOG_ERROR, "Missing SIZ\n");
1258  return AVERROR_INVALIDDATA;
1259  }
1260 
1261  tile = s->tile + s->curtileno;
1262  tp = tile->tile_part + tile->tp_idx;
1263  bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer);
1264  bytestream2_skip(&s->g, tp->tp_end - s->g.buffer);
1265 
1266  continue;
1267  }
1268  if (marker == JPEG2000_EOC)
1269  break;
1270 
1271  len = bytestream2_get_be16u(&s->g);
1272  if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2)
1273  return AVERROR_INVALIDDATA;
1274 
1275  switch (marker) {
1276  case JPEG2000_SIZ:
1277  ret = get_siz(s);
1278  break;
1279  case JPEG2000_COC:
1280  ret = get_coc(s, codsty, properties);
1281  break;
1282  case JPEG2000_COD:
1283  ret = get_cod(s, codsty, properties);
1284  break;
1285  case JPEG2000_QCC:
1286  ret = get_qcc(s, len, qntsty, properties);
1287  break;
1288  case JPEG2000_QCD:
1289  ret = get_qcd(s, len, qntsty, properties);
1290  break;
1291  case JPEG2000_SOT:
1292  if (!(ret = get_sot(s, len))) {
1293  codsty = s->tile[s->curtileno].codsty;
1294  qntsty = s->tile[s->curtileno].qntsty;
1295  properties = s->tile[s->curtileno].properties;
1296  }
1297  break;
1298  case JPEG2000_PLT:
1299  // the PLT marker is ignored
1300  case JPEG2000_PLM:
1301  // the PLM marker is ignored
1302  case JPEG2000_COM:
1303  // the comment is ignored
1304  bytestream2_skip(&s->g, len - 2);
1305  break;
1306  case JPEG2000_TLM:
1307  // Tile-part lengths
1308  ret = get_tlm(s, len);
1309  break;
1310  default:
1312  "unsupported marker 0x%.4"PRIX16" at pos 0x%X\n",
1313  marker, bytestream2_tell(&s->g) - 4);
1314  bytestream2_skip(&s->g, len - 2);
1315  break;
1316  }
1317  if (bytestream2_tell(&s->g) - oldpos != len || ret) {
1319  "error during processing marker segment %.4"PRIx16"\n",
1320  marker);
1321  return ret ? ret : -1;
1322  }
1323  }
1324  return 0;
1325 }
1326 
1327 /* Read bit stream packets --> T2 operation. */
1329 {
1330  int ret = 0;
1331  int tileno;
1332 
1333  for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1334  Jpeg2000Tile *tile = s->tile + tileno;
1335 
1336  if (ret = init_tile(s, tileno))
1337  return ret;
1338 
1339  s->g = tile->tile_part[0].tpg;
1340  if (ret = jpeg2000_decode_packets(s, tile))
1341  return ret;
1342  }
1343 
1344  return 0;
1345 }
1346 
1348 {
1349  uint32_t atom_size, atom;
1350  int found_codestream = 0, search_range = 10;
1351 
1352  while(!found_codestream && search_range
1353  &&
1354  bytestream2_get_bytes_left(&s->g) >= 8) {
1355  atom_size = bytestream2_get_be32u(&s->g);
1356  atom = bytestream2_get_be32u(&s->g);
1357  if (atom == JP2_CODESTREAM) {
1358  found_codestream = 1;
1359  } else {
1360  if (bytestream2_get_bytes_left(&s->g) < atom_size - 8)
1361  return 0;
1362  bytestream2_skipu(&s->g, atom_size - 8);
1363  search_range--;
1364  }
1365  }
1366 
1367  if (found_codestream)
1368  return 1;
1369  return 0;
1370 }
1371 
1373 {
1374  Jpeg2000DecoderContext *s = avctx->priv_data;
1375 
1376  ff_jpeg2000dsp_init(&s->dsp);
1377 
1378  return 0;
1379 }
1380 
1381 static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1382  int *got_frame, AVPacket *avpkt)
1383 {
1384  Jpeg2000DecoderContext *s = avctx->priv_data;
1385  ThreadFrame frame = { .f = data };
1386  AVFrame *picture = data;
1387  int tileno, ret;
1388 
1389  s->avctx = avctx;
1390  bytestream2_init(&s->g, avpkt->data, avpkt->size);
1391  s->curtileno = 0; // TODO: only one tile in DCI JP2K. to implement for more tiles
1392 
1393  if (bytestream2_get_bytes_left(&s->g) < 2) {
1394  ret = AVERROR_INVALIDDATA;
1395  goto end;
1396  }
1397 
1398  // check if the image is in jp2 format
1399  if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1400  (bytestream2_get_be32u(&s->g) == 12) &&
1401  (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1402  (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
1403  if (!jp2_find_codestream(s)) {
1404  av_log(avctx, AV_LOG_ERROR,
1405  "Could not find Jpeg2000 codestream atom.\n");
1406  ret = AVERROR_INVALIDDATA;
1407  goto end;
1408  }
1409  } else {
1410  bytestream2_seek(&s->g, 0, SEEK_SET);
1411  }
1412 
1413  if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
1414  av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1415  ret = AVERROR_INVALIDDATA;
1416  goto end;
1417  }
1418  if (ret = jpeg2000_read_main_headers(s))
1419  goto end;
1420 
1421  /* get picture buffer */
1422  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
1423  av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed.\n");
1424  goto end;
1425  }
1426  picture->pict_type = AV_PICTURE_TYPE_I;
1427  picture->key_frame = 1;
1428 
1429  if (ret = jpeg2000_read_bitstream_packets(s))
1430  goto end;
1431  for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1432  if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
1433  goto end;
1434 
1436 
1437  *got_frame = 1;
1438 
1439  return bytestream2_tell(&s->g);
1440 
1441 end:
1443  return ret;
1444 }
1445 
1447 {
1450 }
1451 
1452 #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1453 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1454 
1455 static const AVOption options[] = {
1456  { "lowres", "Lower the decoding resolution by a power of two",
1457  OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1458  { NULL },
1459 };
1460 
1461 static const AVClass class = {
1462  .class_name = "jpeg2000",
1463  .item_name = av_default_item_name,
1464  .option = options,
1466 };
1467 
1469  .name = "jpeg2000",
1470  .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1471  .type = AVMEDIA_TYPE_VIDEO,
1472  .id = AV_CODEC_ID_JPEG2000,
1473  .capabilities = AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_DR1,
1474  .priv_data_size = sizeof(Jpeg2000DecoderContext),
1475  .init_static_data = jpeg2000_init_static_data,
1478  .priv_class = &class,
1480 };
static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1, int width, int height, int bpno, int bandno, int seg_symbols, int vert_causal_ctx_csty_symbol)
Definition: jpeg2000dec.c:913
Jpeg2000Component * comp
Definition: jpeg2000dec.c:57
uint8_t nguardbits
Definition: jpeg2000.h:151
#define JPEG2000_CBLK_VSC
Definition: jpeg2000.h:104
void(* mct_decode[FF_DWT_NB])(void *src0, void *src1, void *src2, int csize)
Definition: jpeg2000dsp.h:30
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
#define OFFSET(x)
Definition: jpeg2000dec.c:1452
void av_cold ff_jpeg2000_init_tier1_luts(void)
Definition: jpeg2000.c:161
int flags[JPEG2000_MAX_CBLKW+2][JPEG2000_MAX_CBLKH+2]
Definition: jpeg2000.h:122
GetByteContext g
Definition: jpeg2000dec.c:68
void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
Definition: jpeg2000.c:529
AVCodecContext * avctx
Definition: jpeg2000dec.c:67
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
Definition: jpeg2000dec.c:1229
DWTContext dwt
Definition: jpeg2000.h:193
AVOption.
Definition: opt.h:234
Jpeg2000TgtNode * cblkincl
Definition: jpeg2000.h:170
#define HAD_COC
Definition: jpeg2000dec.c:45
static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, AVFrame *picture)
Definition: jpeg2000dec.c:1195
#define JPEG2000_T1_SIG_NB
Definition: jpeg2000.h:84
AVFrame * f
Definition: thread.h:36
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:61
#define JPEG2000_PGOD_PCRL
Definition: jpeg2000.h:117
float * f_data
Definition: jpeg2000.h:194
#define JPEG2000_PGOD_RLCP
Definition: jpeg2000.h:115
static void jpeg2000_flush(Jpeg2000DecoderContext *s)
Definition: jpeg2000dec.c:114
#define JP2_CODESTREAM
Definition: jpeg2000dec.c:43
Jpeg2000DSPContext dsp
Definition: jpeg2000dec.c:90
int size
Definition: avcodec.h:1347
static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)
Definition: jpeg2000dec.c:459
Jpeg2000QuantStyle qntsty[4]
Definition: jpeg2000dec.c:60
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
Definition: jpeg2000dec.c:1065
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1621
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:132
static int decode_pgod_cprl(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
Definition: jpeg2000dec.c:767
#define FF_ARRAY_ELEMS(a)
av_cold void ff_jpeg2000dsp_init(Jpeg2000DSPContext *c)
Definition: jpeg2000dsp.c:93
static av_cold int jpeg2000_decode_init(AVCodecContext *avctx)
Definition: jpeg2000dec.c:1372
static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)
Definition: jpeg2000dec.c:443
static int init_tile(Jpeg2000DecoderContext *s, int tileno)
Definition: jpeg2000dec.c:573
Jpeg2000CodingStyle codsty[4]
Definition: jpeg2000dec.c:83
int profile
profile
Definition: avcodec.h:2880
AVCodec.
Definition: avcodec.h:3120
float f_stepsize
Definition: jpeg2000.h:179
uint16_t nb_codeblocks_height
Definition: jpeg2000.h:168
static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk, Jpeg2000Component *comp, Jpeg2000T1Context *t1, Jpeg2000Band *band)
Definition: jpeg2000dec.c:1051
static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)
Definition: jpeg2000dec.c:335
static av_always_inline unsigned int bytestream2_get_bufferu(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:270
Macro definitions for various function/variable attributes.
static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
Definition: jpeg2000dec.c:1328
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:202
uint8_t npasses
Definition: jpeg2000.h:155
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:39
static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk, Jpeg2000Component *comp, Jpeg2000T1Context *t1, Jpeg2000Band *band)
Definition: jpeg2000dec.c:1036
static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: jpeg2000dec.c:1381
static void tile_codeblocks(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
Definition: jpeg2000dec.c:1082
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t
#define av_cold
Definition: attributes.h:66
#define JP2_SIG_VALUE
Definition: jpeg2000dec.c:42
AVOptions.
#define WRITE_FRAME(D, PIXEL)
Definition: jpeg2000dec.c:1140
Multithreading support functions.
Jpeg2000TgtNode * zerobits
Definition: jpeg2000.h:169
Jpeg2000Band * band
Definition: jpeg2000.h:188
static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node, int threshold)
Definition: jpeg2000dec.c:122
uint8_t val
Definition: jpeg2000.h:127
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:1346
const uint8_t * buffer
Definition: bytestream.h:33
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
Definition: bytestream.h:167
uint16_t num_precincts_x
Definition: jpeg2000.h:186
#define JPEG2000_T1_VIS
Definition: jpeg2000.h:94
#define JPEG2000_T1_SIG_SE
Definition: jpeg2000.h:82
static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
Definition: jpeg2000dec.c:539
#define JPEG2000_CBLK_SEGSYM
Definition: jpeg2000.h:106
Jpeg2000Tile * tile
Definition: jpeg2000dec.c:89
#define r
Definition: input.c:51
uint8_t nonzerobits
Definition: jpeg2000.h:157
uint8_t log2_prec_widths[JPEG2000_MAX_RESLEVELS]
Definition: jpeg2000.h:143
#define JPEG2000_CSTY_EPH
Definition: jpeg2000.h:111
#define src
Definition: vp8dsp.c:254
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
static int getnpasses(Jpeg2000DecoderContext *s)
Definition: jpeg2000dec.c:608
static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height, int bpno, int bandno, int bpass_csty_symbol, int vert_causal_ctx_csty_symbol)
Definition: jpeg2000dec.c:861
static const uint16_t mask[17]
Definition: lzw.c:38
void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y, int negative)
Definition: jpeg2000.c:173
uint8_t nreslevels
Definition: jpeg2000.h:133
int data[JPEG2000_MAX_CBLKW][JPEG2000_MAX_CBLKH]
Definition: jpeg2000.h:121
void ff_mqc_initdec(MqcState *mqc, uint8_t *bp)
Initialize MQ-decoder.
Definition: mqcdec.c:71
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:161
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
#define JPEG2000_PGOD_CPRL
Definition: jpeg2000.h:118
static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)
Definition: jpeg2000dec.c:370
uint8_t log2_prec_heights[JPEG2000_MAX_RESLEVELS]
Definition: jpeg2000.h:144
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:151
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1503
#define AV_PIX_FMT_RGB48
Definition: pixfmt.h:249
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
Jpeg2000Cblk * cblk
Definition: jpeg2000.h:171
#define FFMAX(a, b)
Definition: common.h:64
uint8_t tile_index
Definition: jpeg2000dec.c:49
uint8_t cblk_style
Definition: jpeg2000.h:141
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:893
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:90
static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
Definition: jpeg2000dec.c:281
#define JPEG2000_T1_REF
Definition: jpeg2000.h:96
static int decode_pgod_lrcp(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
Definition: jpeg2000dec.c:736
uint8_t lblock
Definition: jpeg2000.h:160
#define JP2_SIG_TYPE
Definition: jpeg2000dec.c:41
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:201
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:788
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:247
#define FFMIN(a, b)
Definition: common.h:66
uint8_t data[8192]
Definition: jpeg2000.h:162
struct Jpeg2000TgtNode * parent
Definition: jpeg2000.h:129
int width
picture width / height.
Definition: avcodec.h:1580
JPEG 2000 structures and defines common to encoder and decoder.
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: avconv.c:1288
int i_stepsize
Definition: jpeg2000.h:178
#define JPEG2000_MAX_RESLEVELS
Definition: jpeg2000.h:72
int32_t
#define HAD_QCC
Definition: jpeg2000dec.c:46
#define MQC_CX_RL
Definition: mqc.h:34
uint16_t num_precincts_y
Definition: jpeg2000.h:186
static av_cold void jpeg2000_init_static_data(AVCodec *codec)
Definition: jpeg2000dec.c:1446
static int ff_jpeg2000_getsigctxno(int flag, int bandno)
Definition: jpeg2000.h:225
#define VD
Definition: jpeg2000dec.c:1453
#define FF_PROFILE_JPEG2000_DCINEMA_4K
Definition: avcodec.h:2954
uint16_t lengthinc
Definition: jpeg2000.h:159
#define JPEG2000_MAX_DECLEVELS
Definition: jpeg2000.h:71
static int get_siz(Jpeg2000DecoderContext *s)
Definition: jpeg2000dec.c:162
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
#define JPEG2000_PGOD_RPCL
Definition: jpeg2000.h:116
static int ff_jpeg2000_ceildivpow2(int a, int b)
Definition: jpeg2000.h:201
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:185
GetByteContext tpg
Definition: jpeg2000dec.c:51
NULL
Definition: eval.c:55
uint16_t tp_idx
Definition: jpeg2000dec.c:62
uint16_t coord[2][2]
Definition: jpeg2000.h:176
static int width
Definition: utils.c:156
Libavcodec external API header.
uint16_t coord[2][2]
Definition: jpeg2000.h:163
uint8_t nreslevels2decode
Definition: jpeg2000.h:134
int ff_mqc_decode(MqcState *mqc, uint8_t *cxstate)
MQ decoder.
Definition: mqcdec.c:81
av_default_item_name
Definition: dnxhdenc.c:55
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1409
AVCodec ff_jpeg2000_decoder
Definition: jpeg2000dec.c:1468
uint8_t vis
Definition: jpeg2000.h:128
uint8_t log2_prec_height
Definition: jpeg2000.h:187
void av_cold ff_mqc_init_context_tables(void)
MQ-coder Initialize context tables (QE, NLPS, NMPS)
Definition: mqc.c:97
uint16_t length
Definition: jpeg2000.h:158
uint8_t properties[4]
Definition: jpeg2000dec.c:58
static const AVProfile profiles[]
Definition: libdcadec.c:181
static int getlblockinc(Jpeg2000DecoderContext *s)
Definition: jpeg2000dec.c:623
#define AV_PIX_FMT_XYZ12
Definition: pixfmt.h:286
Describe the class of an AVClass context structure.
Definition: log.h:34
uint8_t nbands
Definition: jpeg2000.h:184
const uint8_t * tp_end
Definition: jpeg2000dec.c:50
uint16_t nb_codeblocks_width
Definition: jpeg2000.h:167
static const AVOption options[]
Definition: jpeg2000dec.c:1455
#define u(width,...)
uint16_t coord[2][2]
Definition: jpeg2000.h:196
#define JPEG2000_T1_SIG_S
Definition: jpeg2000.h:79
Jpeg2000ResLevel * reslevel
Definition: jpeg2000.h:192
static int ff_jpeg2000_ceildiv(int a, int b)
Definition: jpeg2000.h:206
uint8_t expn[JPEG2000_MAX_DECLEVELS *3]
Definition: jpeg2000.h:148
static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
Definition: jpeg2000dec.c:821
int height
Definition: gxfenc.c:72
static int get_sot(Jpeg2000DecoderContext *s, int n)
Definition: jpeg2000dec.c:481
static int jp2_find_codestream(Jpeg2000DecoderContext *s)
Definition: jpeg2000dec.c:1347
static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
Definition: jpeg2000dec.c:1213
uint8_t prog_order
Definition: jpeg2000.h:142
Y , 8bpp.
Definition: pixfmt.h:67
uint8_t quantsty
Definition: jpeg2000.h:150
common internal api header.
common internal and external API header
uint8_t log2_cblk_width
Definition: jpeg2000.h:135
Jpeg2000QuantStyle qntsty[4]
Definition: jpeg2000dec.c:84
int ff_dwt_decode(DWTContext *s, void *t)
Definition: jpeg2000dwt.c:335
uint16_t coord_o[2][2]
Definition: jpeg2000.h:197
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
Jpeg2000TilePart tile_part[3]
Definition: jpeg2000dec.c:61
#define JPEG2000_CBLK_BYPASS
Definition: jpeg2000.h:101
#define MQC_CX_UNI
Definition: mqc.h:33
void * priv_data
Definition: avcodec.h:1451
int ff_jpeg2000_init_component(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty, Jpeg2000QuantStyle *qntsty, int cbps, int dx, int dy, AVCodecContext *avctx)
Definition: jpeg2000.c:432
#define JPEG2000_T1_SIG_SW
Definition: jpeg2000.h:83
#define JPEG2000_PGOD_LRCP
Definition: jpeg2000.h:114
static int get_bits(Jpeg2000DecoderContext *s, int n)
Definition: jpeg2000dec.c:100
int len
#define av_log2
Definition: intmath.h:85
static uint8_t tmp[8]
Definition: des.c:38
static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000ResLevel *rlevel, int precno, int layno, uint8_t *expn, int numgbits)
Definition: jpeg2000dec.c:634
#define FF_PROFILE_JPEG2000_DCINEMA_2K
Definition: avcodec.h:2953
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:196
Jpeg2000Prec * prec
Definition: jpeg2000.h:180
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
Definition: bytestream.h:205
#define JPEG2000_T1_SIG
Definition: jpeg2000.h:95
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:205
static void comp(unsigned char *dst, int dst_stride, unsigned char *src, int src_stride, int add)
Definition: eamad.c:83
MqcState mqc
Definition: jpeg2000.h:123
static int ff_jpeg2000_getrefctxno(int flag)
Definition: jpeg2000.h:234
#define JPEG2000_CSTY_PREC
Definition: jpeg2000.h:109
uint8_t log2_cblk_height
Definition: jpeg2000.h:135
uint8_t log2_prec_width
Definition: jpeg2000.h:187
uint32_t mant[JPEG2000_MAX_DECLEVELS *3]
Definition: jpeg2000.h:149
static void decode_refpass(Jpeg2000T1Context *t1, int width, int height, int bpno)
Definition: jpeg2000dec.c:891
This structure stores compressed data.
Definition: avcodec.h:1323
static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
Definition: jpeg2000dec.c:398
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:211
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:838
Jpeg2000CodingStyle codsty[4]
Definition: jpeg2000dec.c:59
static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, int width, int height, int bandpos)
Definition: jpeg2000dec.c:976
uint8_t cx_states[19]
Definition: mqc.h:45
const AVProfile ff_jpeg2000_profiles[]
Definition: profiles.c:74
static int ff_jpeg2000_getsgnctxno(int flag, int *xorbit)
Definition: jpeg2000.h:243