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jpeg2000: Validate resolution levels
[libav.git] / libavcodec / jpeg2000dec.c
CommitLineData
c81a7063
NB		 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
23/**
24 * @file
25 * JPEG 2000 image decoder
26 */
27
28#include "libavutil/common.h"
29#include "libavutil/opt.h"
30#include "avcodec.h"
31#include "bytestream.h"
32#include "internal.h"
2e2d2466 33#include "thread.h"
c81a7063
NB		 34#include "jpeg2000.h"
35
36#define JP2_SIG_TYPE 0x6A502020
37#define JP2_SIG_VALUE 0x0D0A870A
38#define JP2_CODESTREAM 0x6A703263
39
40#define HAD_COC 0x01
41#define HAD_QCC 0x02
42
43typedef struct Jpeg2000TilePart {
44 uint16_t tp_idx; // Tile-part index
45 uint8_t tile_index; // Tile index who refers the tile-part
46 uint32_t tp_len; // Length of tile-part
47 const uint8_t *tp_start_bstrm; // Start address bit stream in tile-part
48 const uint8_t *tp_end_bstrm; // End address of the bit stream tile part
49} Jpeg2000TilePart;
50
51/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
52 * one per component, so tile_part elements have a size of 3 */
53typedef struct Jpeg2000Tile {
54 Jpeg2000Component *comp;
55 uint8_t properties[4];
56 Jpeg2000CodingStyle codsty[4];
57 Jpeg2000QuantStyle qntsty[4];
58 Jpeg2000TilePart tile_part[3];
59} Jpeg2000Tile;
60
61typedef struct Jpeg2000DecoderContext {
62 AVClass *class;
63 AVCodecContext *avctx;
64
65 int width, height;
66 int image_offset_x, image_offset_y;
67 int tile_offset_x, tile_offset_y;
68 uint8_t cbps[4]; // bits per sample in particular components
69 uint8_t sgnd[4]; // if a component is signed
70 uint8_t properties[4];
71 int cdx[4], cdy[4];
72 int precision;
73 int ncomponents;
74 int tile_width, tile_height;
75 int numXtiles, numYtiles;
76 int maxtilelen;
77
78 Jpeg2000CodingStyle codsty[4];
79 Jpeg2000QuantStyle qntsty[4];
80
81 const uint8_t *buf_start;
82 const uint8_t *buf;
83 const uint8_t *buf_end;
84 int bit_index;
85
86 int16_t curtileno;
87 Jpeg2000Tile *tile;
88
89 /*options parameters*/
90 int16_t lowres;
91 int16_t reduction_factor;
92} Jpeg2000DecoderContext;
93
94/* get_bits functions for JPEG2000 packet bitstream
95 * It is a get_bit function with a bit-stuffing routine. If the value of the
96 * byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB.
97 * cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */
98static int get_bits(Jpeg2000DecoderContext *s, int n)
99{
100 int res = 0;
101 if (s->buf_end - s->buf < ((n - s->bit_index) >> 8))
102 return AVERROR(EINVAL);
103 while (--n >= 0) {
104 res <<= 1;
105 if (s->bit_index == 0) {
106 s->bit_index = 7 + (*s->buf != 0xff);
107 s->buf++;
108 }
109 s->bit_index--;
110 res |= (*s->buf >> s->bit_index) & 1;
111 }
112 return res;
113}
114
115static void jpeg2000_flush(Jpeg2000DecoderContext *s)
116{
117 if (*s->buf == 0xff)
118 s->buf++;
119 s->bit_index = 8;
120 s->buf++;
121}
122
123/* decode the value stored in node */
124static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node,
125 int threshold)
126{
127 Jpeg2000TgtNode *stack[30];
128 int sp = -1, curval = 0;
129
130 while (node && !node->vis) {
131 stack[++sp] = node;
132 node = node->parent;
133 }
134
135 if (node)
136 curval = node->val;
137 else
138 curval = stack[sp]->val;
139
140 while (curval < threshold && sp >= 0) {
141 if (curval < stack[sp]->val)
142 curval = stack[sp]->val;
143 while (curval < threshold) {
144 int ret;
145 if ((ret = get_bits(s, 1)) > 0) {
146 stack[sp]->vis++;
147 break;
148 } else if (!ret)
149 curval++;
150 else
151 return ret;
152 }
153 stack[sp]->val = curval;
154 sp--;
155 }
156 return curval;
157}
158
159/* marker segments */
160/* get sizes and offsets of image, tiles; number of components */
161static int get_siz(Jpeg2000DecoderContext *s)
162{
163 int i;
164
165 if (s->buf_end - s->buf < 36)
166 return AVERROR(EINVAL);
167
168 s->avctx->profile = bytestream_get_be16(&s->buf); // Rsiz
169 s->width = bytestream_get_be32(&s->buf); // Width
170 s->height = bytestream_get_be32(&s->buf); // Height
171 s->image_offset_x = bytestream_get_be32(&s->buf); // X0Siz
172 s->image_offset_y = bytestream_get_be32(&s->buf); // Y0Siz
173 s->tile_width = bytestream_get_be32(&s->buf); // XTSiz
174 s->tile_height = bytestream_get_be32(&s->buf); // YTSiz
175 s->tile_offset_x = bytestream_get_be32(&s->buf); // XT0Siz
176 s->tile_offset_y = bytestream_get_be32(&s->buf); // YT0Siz
177 s->ncomponents = bytestream_get_be16(&s->buf); // CSiz
178
179 if (s->buf_end - s->buf < 2 * s->ncomponents)
180 return AVERROR(EINVAL);
181
182 for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
183 uint8_t x = bytestream_get_byte(&s->buf);
184 s->cbps[i] = (x & 0x7f) + 1;
185 s->precision = FFMAX(s->cbps[i], s->precision);
186 s->sgnd[i] = (x & 0x80) == 1;
187 s->cdx[i] = bytestream_get_byte(&s->buf);
188 s->cdy[i] = bytestream_get_byte(&s->buf);
189 }
190
191 s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
192 s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
193
194 s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(*s->tile));
195 if (!s->tile)
196 return AVERROR(ENOMEM);
197
198 for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
199 Jpeg2000Tile *tile = s->tile + i;
200
201 tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
202 if (!tile->comp)
203 return AVERROR(ENOMEM);
204 }
205
206 /* compute image size with reduction factor */
207 s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x,
208 s->reduction_factor);
209 s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
210 s->reduction_factor);
211
212 switch (s->avctx->profile) {
213 case FF_PROFILE_JPEG2000_DCINEMA_2K:
214 case FF_PROFILE_JPEG2000_DCINEMA_4K:
215 /* XYZ color-space for digital cinema profiles */
10f1a4d9 216 s->avctx->pix_fmt = AV_PIX_FMT_XYZ12;
c81a7063
NB		 217 break;
218 default:
219 /* For other profiles selects color-space according number of
220 * components and bit depth precision. */
221 switch (s->ncomponents) {
222 case 1:
223 if (s->precision > 8)
224 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
225 else
226 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
227 break;
228 case 3:
229 if (s->precision > 8)
230 s->avctx->pix_fmt = AV_PIX_FMT_RGB48;
231 else
232 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
233 break;
234 case 4:
235 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
236 break;
237 default:
238 /* pixel format can not be identified */
239 s->avctx->pix_fmt = AV_PIX_FMT_NONE;
240 break;
241 }
242 break;
243 }
244 return 0;
245}
246
247/* get common part for COD and COC segments */
248static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
249{
250 uint8_t byte;
251
252 if (s->buf_end - s->buf < 5)
253 return AVERROR(EINVAL);
5650e331
LB		 254 /* nreslevels = number of resolution levels
255 = number of decomposition level +1 */
256 c->nreslevels = bytestream_get_byte(&s->buf) + 1;
257
258 if (c->nreslevels > JPEG2000_MAX_RESLEVELS)
259 return AVERROR_INVALIDDATA;
c81a7063
NB		 260
261 /* compute number of resolution levels to decode */
262 if (c->nreslevels < s->reduction_factor)
263 c->nreslevels2decode = 1;
264 else
265 c->nreslevels2decode = c->nreslevels - s->reduction_factor;
266
267 c->log2_cblk_width = bytestream_get_byte(&s->buf) + 2; // cblk width
268 c->log2_cblk_height = bytestream_get_byte(&s->buf) + 2; // cblk height
269
270 c->cblk_style = bytestream_get_byte(&s->buf);
271 if (c->cblk_style != 0) { // cblk style
272 av_log(s->avctx, AV_LOG_ERROR, "no extra cblk styles supported\n");
273 return -1;
274 }
275 c->transform = bytestream_get_byte(&s->buf); // DWT transformation type
276 /* set integer 9/7 DWT in case of BITEXACT flag */
277 if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
278 c->transform = FF_DWT97_INT;
279
280 if (c->csty & JPEG2000_CSTY_PREC) {
281 int i;
282 for (i = 0; i < c->nreslevels; i++) {
283 byte = bytestream_get_byte(&s->buf);
284 c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
285 c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
286 }
287 }
288 return 0;
289}
290
291/* get coding parameters for a particular tile or whole image*/
292static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
293 uint8_t *properties)
294{
295 Jpeg2000CodingStyle tmp;
296 int compno;
297
298 if (s->buf_end - s->buf < 5)
299 return AVERROR(EINVAL);
300
301 tmp.log2_prec_width =
302 tmp.log2_prec_height = 15;
303
304 tmp.csty = bytestream_get_byte(&s->buf);
305
306 // get progression order
307 tmp.prog_order = bytestream_get_byte(&s->buf);
308
309 tmp.nlayers = bytestream_get_be16(&s->buf);
310 tmp.mct = bytestream_get_byte(&s->buf); // multiple component transformation
311
312 get_cox(s, &tmp);
313 for (compno = 0; compno < s->ncomponents; compno++)
314 if (!(properties[compno] & HAD_COC))
315 memcpy(c + compno, &tmp, sizeof(tmp));
316 return 0;
317}
318
319/* Get coding parameters for a component in the whole image or a
320 * particular tile. */
321static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
322 uint8_t *properties)
323{
324 int compno;
325
326 if (s->buf_end - s->buf < 2)
327 return AVERROR(EINVAL);
328
329 compno = bytestream_get_byte(&s->buf);
330
331 c += compno;
332 c->csty = bytestream_get_byte(&s->buf);
333 get_cox(s, c);
334
335 properties[compno] |= HAD_COC;
336 return 0;
337}
338
339/* Get common part for QCD and QCC segments. */
340static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
341{
342 int i, x;
343
344 if (s->buf_end - s->buf < 1)
345 return AVERROR(EINVAL);
346
347 x = bytestream_get_byte(&s->buf); // Sqcd
348
349 q->nguardbits = x >> 5;
350 q->quantsty = x & 0x1f;
351
352 if (q->quantsty == JPEG2000_QSTY_NONE) {
353 n -= 3;
354 if (s->buf_end - s->buf < n)
355 return AVERROR(EINVAL);
356 for (i = 0; i < n; i++)
357 q->expn[i] = bytestream_get_byte(&s->buf) >> 3;
358 } else if (q->quantsty == JPEG2000_QSTY_SI) {
359 if (s->buf_end - s->buf < 2)
360 return AVERROR(EINVAL);
361 x = bytestream_get_be16(&s->buf);
362 q->expn[0] = x >> 11;
363 q->mant[0] = x & 0x7ff;
364 for (i = 1; i < 32 * 3; i++) {
365 int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
366 q->expn[i] = curexpn;
367 q->mant[i] = q->mant[0];
368 }
369 } else {
370 n = (n - 3) >> 1;
371 if (s->buf_end - s->buf < n)
372 return AVERROR(EINVAL);
373 for (i = 0; i < n; i++) {
374 x = bytestream_get_be16(&s->buf);
375 q->expn[i] = x >> 11;
376 q->mant[i] = x & 0x7ff;
377 }
378 }
379 return 0;
380}
381
382/* Get quantization parameters for a particular tile or a whole image. */
383static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
384 uint8_t *properties)
385{
386 Jpeg2000QuantStyle tmp;
387 int compno;
388
389 if (get_qcx(s, n, &tmp))
390 return -1;
391 for (compno = 0; compno < s->ncomponents; compno++)
392 if (!(properties[compno] & HAD_QCC))
393 memcpy(q + compno, &tmp, sizeof(tmp));
394 return 0;
395}
396
397/* Get quantization parameters for a component in the whole image
398 * on in a particular tile. */
399static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
400 uint8_t *properties)
401{
402 int compno;
403
404 if (s->buf_end - s->buf < 1)
405 return AVERROR(EINVAL);
406
407 compno = bytestream_get_byte(&s->buf);
408 properties[compno] |= HAD_QCC;
409 return get_qcx(s, n - 1, q + compno);
410}
411
412/* Get start of tile segment. */
413static uint8_t get_sot(Jpeg2000DecoderContext *s, int n)
414{
415 Jpeg2000TilePart *tp;
416 uint16_t Isot;
417 uint32_t Psot;
418 uint8_t TPsot;
419
420 if (s->buf_end - s->buf < 4)
421 return AVERROR(EINVAL);
422
423 Isot = bytestream_get_be16(&s->buf); // Isot
424 if (Isot) {
425 av_log(s->avctx, AV_LOG_ERROR,
426 "Not a DCINEMA JP2K file: more than one tile\n");
427 return -1;
428 }
429 Psot = bytestream_get_be32(&s->buf); // Psot
430 TPsot = bytestream_get_byte(&s->buf); // TPsot
431
432 /* Read TNSot but not used */
433 bytestream_get_byte(&s->buf); // TNsot
434
435 tp = s->tile[s->curtileno].tile_part + TPsot;
436 tp->tile_index = Isot;
437 tp->tp_len = Psot;
438 tp->tp_idx = TPsot;
439
440 /* Start of bit stream. Pointer to SOD marker
441 * Check SOD marker is present. */
442 if (JPEG2000_SOD == bytestream_get_be16(&s->buf))
443 tp->tp_start_bstrm = s->buf;
444 else {
445 av_log(s->avctx, AV_LOG_ERROR, "SOD marker not found \n");
446 return -1;
447 }
448
449 /* End address of bit stream =
450 * start address + (Psot - size of SOT HEADER(n)
451 * - size of SOT MARKER(2) - size of SOD marker(2) */
452 tp->tp_end_bstrm = s->buf + (tp->tp_len - n - 4);
453
454 // set buffer pointer to end of tile part header
455 s->buf = tp->tp_end_bstrm;
456
457 return 0;
458}
459
460/* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
461 * Used to know the number of tile parts and lengths.
462 * There may be multiple TLMs in the header.
463 * TODO: The function is not used for tile-parts management, nor anywhere else.
464 * It can be useful to allocate memory for tile parts, before managing the SOT
465 * markers. Parsing the TLM header is needed to increment the input header
466 * buffer.
467 * This marker is mandatory for DCI. */
468static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
469{
470 uint8_t Stlm, ST, SP, tile_tlm, i;
471 bytestream_get_byte(&s->buf); /* Ztlm: skipped */
472 Stlm = bytestream_get_byte(&s->buf);
473
474 // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
475 ST = (Stlm >> 4) & 0x03;
476 // TODO: Manage case of ST = 0b11 --> raise error
477 SP = (Stlm >> 6) & 0x01;
478 tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
479 for (i = 0; i < tile_tlm; i++) {
480 switch (ST) {
481 case 0:
482 break;
483 case 1:
484 bytestream_get_byte(&s->buf);
485 break;
486 case 2:
487 bytestream_get_be16(&s->buf);
488 break;
489 case 3:
490 bytestream_get_be32(&s->buf);
491 break;
492 }
493 if (SP == 0) {
494 bytestream_get_be16(&s->buf);
495 } else {
496 bytestream_get_be32(&s->buf);
497 }
498 }
499 return 0;
500}
501
502static int init_tile(Jpeg2000DecoderContext *s, int tileno)
503{
504 int compno;
505 int tilex = tileno % s->numXtiles;
506 int tiley = tileno / s->numXtiles;
507 Jpeg2000Tile *tile = s->tile + tileno;
508 Jpeg2000CodingStyle *codsty;
509 Jpeg2000QuantStyle *qntsty;
510
511 if (!tile->comp)
512 return AVERROR(ENOMEM);
513
514 /* copy codsty, qnsty to tile. TODO: Is it the best way?
515 * codsty, qnsty is an array of 4 structs Jpeg2000CodingStyle
516 * and Jpeg2000QuantStyle */
517 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(*codsty));
518 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(*qntsty));
519
520 for (compno = 0; compno < s->ncomponents; compno++) {
521 Jpeg2000Component *comp = tile->comp + compno;
522 int ret; // global bandno
523 codsty = tile->codsty + compno;
524 qntsty = tile->qntsty + compno;
525
526 comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
527 comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
528 comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
529 comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
530
531 // FIXME: add a dcinema profile check ?
532 // value is guaranteed by profile (orig=0, 1 tile)
533 comp->coord[0][0] = 0;
534 comp->coord[0][1] = s->avctx->width;
535 comp->coord[1][0] = 0;
536 comp->coord[1][1] = s->avctx->height;
537
538 if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
539 s->cbps[compno], s->cdx[compno],
540 s->cdy[compno], s->avctx))
541 return ret;
542 }
543 return 0;
544}
545
546/* Read the number of coding passes. */
547static int getnpasses(Jpeg2000DecoderContext *s)
548{
549 int num;
550 if (!get_bits(s, 1))
551 return 1;
552 if (!get_bits(s, 1))
553 return 2;
554 if ((num = get_bits(s, 2)) != 3)
555 return num < 0 ? num : 3 + num;
556 if ((num = get_bits(s, 5)) != 31)
557 return num < 0 ? num : 6 + num;
558 num = get_bits(s, 7);
559 return num < 0 ? num : 37 + num;
560}
561
562static int getlblockinc(Jpeg2000DecoderContext *s)
563{
564 int res = 0, ret;
565 while (ret = get_bits(s, 1)) {
566 if (ret < 0)
567 return ret;
568 res++;
569 }
570 return res;
571}
572
573static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
574 Jpeg2000CodingStyle *codsty,
575 Jpeg2000ResLevel *rlevel, int precno,
576 int layno, uint8_t *expn, int numgbits)
577{
578 int bandno, cblkno, ret, nb_code_blocks;
579
580 if (!(ret = get_bits(s, 1))) {
581 jpeg2000_flush(s);
582 return 0;
583 } else if (ret < 0)
584 return ret;
585
586 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
587 Jpeg2000Band *band = rlevel->band + bandno;
588 Jpeg2000Prec *prec = band->prec + precno;
589
590 if (band->coord[0][0] == band->coord[0][1] ||
591 band->coord[1][0] == band->coord[1][1])
592 continue;
593 prec->yi0 = 0;
594 prec->xi0 = 0;
595 nb_code_blocks = prec->nb_codeblocks_height *
596 prec->nb_codeblocks_width;
597 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
598 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
599 int incl, newpasses, llen;
600
601 if (cblk->npasses)
602 incl = get_bits(s, 1);
603 else
604 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
605 if (!incl)
606 continue;
607 else if (incl < 0)
608 return incl;
609
610 if (!cblk->npasses)
611 cblk->nonzerobits = expn[bandno] + numgbits - 1 -
612 tag_tree_decode(s, prec->zerobits + cblkno,
613 100);
614 if ((newpasses = getnpasses(s)) < 0)
615 return newpasses;
616 if ((llen = getlblockinc(s)) < 0)
617 return llen;
618 cblk->lblock += llen;
619 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
620 return ret;
621 cblk->lengthinc = ret;
622 cblk->npasses += newpasses;
623 }
624 }
625 jpeg2000_flush(s);
626
627 if (codsty->csty & JPEG2000_CSTY_EPH) {
628 if (AV_RB16(s->buf) == JPEG2000_EPH)
629 s->buf += 2;
630 else
631 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
632 }
633
634 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
635 Jpeg2000Band *band = rlevel->band + bandno;
636 Jpeg2000Prec *prec = band->prec + precno;
637
638 nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
639 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
640 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
641 if (s->buf_end - s->buf < cblk->lengthinc)
642 return AVERROR(EINVAL);
28816f9d
NB		 643 /* Code-block data can be empty. In that case initialize data
644 * with 0xFFFF. */
645 if (cblk->lengthinc > 0) {
646 bytestream_get_buffer(&s->buf, cblk->data, cblk->lengthinc);
647 } else {
648 cblk->data[0] = 0xFF;
649 cblk->data[1] = 0xFF;
650 }
c81a7063
NB		 651 cblk->length += cblk->lengthinc;
652 cblk->lengthinc = 0;
653 }
654 }
655 return 0;
656}
657
658static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
659{
660 int layno, reslevelno, compno, precno, ok_reslevel;
661 uint8_t prog_order = tile->codsty[0].prog_order;
662 uint16_t x;
663 uint16_t y;
664
665 s->bit_index = 8;
666 switch (prog_order) {
667 case JPEG2000_PGOD_LRCP:
668 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
669 ok_reslevel = 1;
670 for (reslevelno = 0; ok_reslevel; reslevelno++) {
671 ok_reslevel = 0;
672 for (compno = 0; compno < s->ncomponents; compno++) {
673 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
674 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
675 if (reslevelno < codsty->nreslevels) {
676 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
677 reslevelno;
678 ok_reslevel = 1;
679 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
680 if (jpeg2000_decode_packet(s,
681 codsty, rlevel,
682 precno, layno,
683 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
684 qntsty->nguardbits))
685 return -1;
686 }
687 }
688 }
689 }
690 break;
691
692 case JPEG2000_PGOD_CPRL:
693 for (compno = 0; compno < s->ncomponents; compno++) {
694 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
695 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
696
697 /* Set bit stream buffer address according to tile-part.
698 * For DCinema one tile-part per component, so can be
699 * indexed by component. */
700 s->buf = tile->tile_part[compno].tp_start_bstrm;
701
702 /* Position loop (y axis)
703 * TODO: Automate computing of step 256.
704 * Fixed here, but to be computed before entering here. */
705 for (y = 0; y < s->height; y += 256) {
706 /* Position loop (y axis)
707 * TODO: automate computing of step 256.
708 * Fixed here, but to be computed before entering here. */
709 for (x = 0; x < s->width; x += 256) {
710 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
711 uint16_t prcx, prcy;
712 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
713 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
714
715 if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
716 (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
717 continue;
718
719 if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
720 (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
721 continue;
722
723 // check if a precinct exists
724 prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
725 prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
726 precno = prcx + rlevel->num_precincts_x * prcy;
727 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
728 if (jpeg2000_decode_packet(s, codsty, rlevel,
729 precno, layno,
730 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
731 qntsty->nguardbits))
732 return -1;
733 }
734 }
735 }
736 }
737 }
738 break;
739
740 default:
741 break;
742 }
743
744 /* EOC marker reached */
745 s->buf += 2;
746
747 return 0;
748}
749
750/* TIER-1 routines */
751static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
752 int bpno, int bandno)
753{
754 int mask = 3 << (bpno - 1), y0, x, y;
755
756 for (y0 = 0; y0 < height; y0 += 4)
757 for (x = 0; x < width; x++)
758 for (y = y0; y < height && y < y0 + 4; y++)
759 if ((t1->flags[y + 1][x + 1] & JPEG2000_T1_SIG_NB)
760 && !(t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
761 if (ff_mqc_decode(&t1->mqc,
762 t1->mqc.cx_states +
763 ff_jpeg2000_getsigctxno(t1->flags[y + 1][x + 1],
764 bandno))) {
765 int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
766 &xorbit);
767
768 t1->data[y][x] =
769 (ff_mqc_decode(&t1->mqc,
770 t1->mqc.cx_states + ctxno) ^ xorbit)
771 ? -mask : mask;
772
773 ff_jpeg2000_set_significance(t1, x, y,
774 t1->data[y][x] < 0);
775 }
776 t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
777 }
778}
779
780static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
781 int bpno)
782{
783 int phalf, nhalf;
784 int y0, x, y;
785
786 phalf = 1 << (bpno - 1);
787 nhalf = -phalf;
788
789 for (y0 = 0; y0 < height; y0 += 4)
790 for (x = 0; x < width; x++)
791 for (y = y0; y < height && y < y0 + 4; y++)
792 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
793 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
794 int r = ff_mqc_decode(&t1->mqc,
795 t1->mqc.cx_states + ctxno)
796 ? phalf : nhalf;
797 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
798 t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
799 }
800}
801
802static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
803 int width, int height, int bpno, int bandno,
804 int seg_symbols)
805{
806 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
807
808 for (y0 = 0; y0 < height; y0 += 4)
809 for (x = 0; x < width; x++) {
810 if (y0 + 3 < height &&
811 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
812 (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
813 (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
814 (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
815 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
816 continue;
817 runlen = ff_mqc_decode(&t1->mqc,
818 t1->mqc.cx_states + MQC_CX_UNI);
819 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
820 t1->mqc.cx_states +
821 MQC_CX_UNI);
822 dec = 1;
823 } else {
824 runlen = 0;
825 dec = 0;
826 }
827
828 for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
829 if (!dec) {
830 if (!(t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)))
831 dec = ff_mqc_decode(&t1->mqc,
832 t1->mqc.cx_states +
833 ff_jpeg2000_getsigctxno(t1->flags[y + 1][x + 1],
834 bandno));
835 }
836 if (dec) {
837 int xorbit;
838 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
839 &xorbit);
840 t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
841 t1->mqc.cx_states + ctxno) ^
842 xorbit)
843 ? -mask : mask;
844 ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
845 }
846 dec = 0;
847 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
848 }
849 }
850 if (seg_symbols) {
851 int val;
852 val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
853 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
854 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
855 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
856 if (val != 0xa)
857 av_log(s->avctx, AV_LOG_ERROR,
858 "Segmentation symbol value incorrect\n");
859 }
860}
861
862static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
863 Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
864 int width, int height, int bandpos)
865{
866 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
867
c81a7063
NB		 868 for (y = 0; y < height; y++)
869 memset(t1->data[y], 0, width * sizeof(width));
28816f9d
NB		 870 /* If code-block contains no compressed data: nothing to do. */
871 if (!cblk->length)
872 return 0;
873 for (y = 0; y < height + 2; y++)
874 memset(t1->flags[y], 0, (width + 2) * sizeof(width));
c81a7063
NB		 875
876 ff_mqc_initdec(&t1->mqc, cblk->data);
877 cblk->data[cblk->length] = 0xff;
878 cblk->data[cblk->length + 1] = 0xff;
879
880 while (passno--) {
881 switch (pass_t) {
882 case 0:
883 decode_sigpass(t1, width, height, bpno + 1, bandpos);
884 break;
885 case 1:
886 decode_refpass(t1, width, height, bpno + 1);
887 break;
888 case 2:
889 decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
890 codsty->cblk_style & JPEG2000_CBLK_SEGSYM);
891 break;
892 }
893
894 pass_t++;
895 if (pass_t == 3) {
896 bpno--;
897 pass_t = 0;
898 }
899 }
900 return 0;
901}
902
903/* TODO: Verify dequantization for lossless case
904 * comp->data can be float or int
905 * band->stepsize can be float or int
906 * depending on the type of DWT transformation.
907 * see ISO/IEC 15444-1:2002 A.6.1 */
908
909/* Float dequantization of a codeblock.*/
910static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
911 Jpeg2000Component *comp,
912 Jpeg2000T1Context *t1, Jpeg2000Band *band)
913{
914 int i, j, idx;
915 float *datap = &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
916 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
917 for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
918 idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
919 datap[idx] = (float)(t1->data[j][i]) * ((float)band->stepsize);
920 }
921 return;
922}
923
924/* Integer dequantization of a codeblock.*/
925static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
926 Jpeg2000Component *comp,
927 Jpeg2000T1Context *t1, Jpeg2000Band *band)
928{
929 int i, j, idx;
930 int32_t *datap =
931 (int32_t *) &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
932 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
933 for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
934 idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
935 datap[idx] =
936 ((int32_t)(t1->data[j][i]) * ((int32_t)band->stepsize) + (1 << 15)) >> 16;
937 }
938 return;
939}
940
941/* Inverse ICT parameters in float and integer.
942 * int value = (float value) * (1<<16) */
943static const float f_ict_params[4] = {
944 1.402f,
945 0.34413f,
946 0.71414f,
947 1.772f
948};
949static const int i_ict_params[4] = {
950 91881,
951 22553,
952 46802,
953 116130
954};
955
956static int mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
957{
958 int i, csize = 1;
959 int ret = 0;
960 int32_t *src[3], i0, i1, i2;
961 float *srcf[3], i0f, i1f, i2f;
962
963 for (i = 0; i < 3; i++)
964 if (tile->codsty[0].transform == FF_DWT97)
965 srcf[i] = tile->comp[i].data;
966 else
967 src[i] = (int32_t *)tile->comp[i].data;
968
969 for (i = 0; i < 2; i++)
970 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
971 switch (tile->codsty[0].transform) {
972 case FF_DWT97:
973 for (i = 0; i < csize; i++) {
974 i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
975 i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
976 - (f_ict_params[2] * *srcf[2]);
977 i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
978 *srcf[0]++ = i0f;
979 *srcf[1]++ = i1f;
980 *srcf[2]++ = i2f;
981 }
982 break;
983 case FF_DWT97_INT:
984 for (i = 0; i < csize; i++) {
985 i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
986 i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
987 - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
988 i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
989 *src[0]++ = i0;
990 *src[1]++ = i1;
991 *src[2]++ = i2;
992 }
993 break;
994 case FF_DWT53:
995 for (i = 0; i < csize; i++) {
996 i1 = *src[0] - (*src[2] + *src[1] >> 2);
997 i0 = i1 + *src[2];
998 i2 = i1 + *src[1];
999 *src[0]++ = i0;
1000 *src[1]++ = i1;
1001 *src[2]++ = i2;
1002 }
1003 break;
1004 }
1005 return ret;
1006}
1007
1008static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1009 AVFrame *picture)
1010{
1011 int compno, reslevelno, bandno;
1012 int x, y;
1013
1014 uint8_t *line;
1015 Jpeg2000T1Context t1;
1016 /* Loop on tile components */
1017
1018 for (compno = 0; compno < s->ncomponents; compno++) {
1019 Jpeg2000Component *comp = tile->comp + compno;
1020 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1021 /* Loop on resolution levels */
1022 for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1023 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1024 /* Loop on bands */
1025 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1026 uint16_t nb_precincts, precno;
1027 Jpeg2000Band *band = rlevel->band + bandno;
1028 int cblkno = 0, bandpos;
1029 bandpos = bandno + (reslevelno > 0);
1030
1031 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1032 /* Loop on precincts */
1033 for (precno = 0; precno < nb_precincts; precno++) {
1034 Jpeg2000Prec *prec = band->prec + precno;
1035
1036 /* Loop on codeblocks */
1037 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1038 int x, y;
1039 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1040 decode_cblk(s, codsty, &t1, cblk,
1041 cblk->coord[0][1] - cblk->coord[0][0],
1042 cblk->coord[1][1] - cblk->coord[1][0],
1043 bandpos);
1044
1045 /* Manage band offsets */
1046 x = cblk->coord[0][0];
1047 y = cblk->coord[1][0];
1048 if ((reslevelno > 0) && ((bandno + 1) & 1)) {
1049 Jpeg2000ResLevel *pres = comp->reslevel + (reslevelno - 1);
1050 x += pres->coord[0][1] - pres->coord[0][0];
1051 }
1052 if ((reslevelno > 0) && ((bandno + 1) & 2)) {
1053 Jpeg2000ResLevel *pres = comp->reslevel + (reslevelno - 1);
1054 y += pres->coord[1][1] - pres->coord[1][0];
1055 }
1056
1057 if (s->avctx->flags & CODEC_FLAG_BITEXACT)
1058 dequantization_int(x, y, cblk, comp, &t1, band);
1059 else
1060 dequantization_float(x, y, cblk, comp, &t1, band);
1061 } /* end cblk */
1062 } /*end prec */
1063 } /* end band */
1064 } /* end reslevel */
1065
1066 /* inverse DWT */
1067 ff_dwt_decode(&comp->dwt, comp->data);
1068 } /*end comp */
1069
1070 /* inverse MCT transformation */
1071 if (tile->codsty[0].mct)
1072 mct_decode(s, tile);
1073
7c57a582 1074 if (s->avctx->pix_fmt == AV_PIX_FMT_BGRA) // RGBA -> BGRA
c81a7063
NB		 1075 FFSWAP(float *, tile->comp[0].data, tile->comp[2].data);
1076
1077 if (s->precision <= 8) {
1078 for (compno = 0; compno < s->ncomponents; compno++) {
1079 Jpeg2000Component *comp = tile->comp + compno;
1080 int32_t *datap = (int32_t *)comp->data;
1081 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1082 line = picture->data[0] + y * picture->linesize[0];
1083 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1084 uint8_t *dst;
1085
1086 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1087 dst = line + x * s->ncomponents + compno;
1088
1089 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) {
1090 *datap += 1 << (s->cbps[compno] - 1);
1091 if (*datap < 0)
1092 *datap = 0;
1093 else if (*datap >= (1 << s->cbps[compno]))
1094 *datap = (1 << s->cbps[compno]) - 1;
1095 *dst = *datap++;
1096 dst += s->ncomponents;
1097 }
1098 line += picture->linesize[0];
1099 }
1100 }
1101 } else {
1102 for (compno = 0; compno < s->ncomponents; compno++) {
1103 Jpeg2000Component *comp = tile->comp + compno;
1104 float *datap = comp->data;
1105 int32_t *i_datap = (int32_t *) comp->data;
1106 uint16_t *linel;
1107
1108 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1109 linel = (uint16_t *)picture->data[0] + y * (picture->linesize[0] >> 1);
1110 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1111 uint16_t *dst;
1112 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1113 dst = linel + (x * s->ncomponents + compno);
1114 for (; x < s->avctx->width; x += s->cdx[compno]) {
1115 int16_t val;
1116 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1117 if (s->avctx->flags & CODEC_FLAG_BITEXACT)
1118 val = *i_datap + (1 << (s->cbps[compno] - 1));
1119 else
1120 val = lrintf(*datap) + (1 << (s->cbps[compno] - 1));
1121 val = av_clip(val, 0, (1 << s->cbps[compno]) - 1);
1122 /* align 12 bit values in little-endian mode */
1123 *dst = val << 4;
1124 datap++;
1125 i_datap++;
1126 dst += s->ncomponents;
1127 }
1128 linel += picture->linesize[0] >> 1;
1129 }
1130 }
1131 }
1132 return 0;
1133}
1134
1135static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1136{
1137 int tileno, compno;
1138 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1139 for (compno = 0; compno < s->ncomponents; compno++) {
1140 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1141 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1142
1143 ff_jpeg2000_cleanup(comp, codsty);
1144 }
1145 av_freep(&s->tile[tileno].comp);
1146 }
1147 av_freep(&s->tile);
1148}
1149
1150static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1151{
1152 Jpeg2000CodingStyle *codsty = s->codsty;
1153 Jpeg2000QuantStyle *qntsty = s->qntsty;
1154 uint8_t *properties = s->properties;
1155
1156 for (;;) {
1157 int len, ret = 0;
1158 uint16_t marker;
1159 const uint8_t *oldbuf;
1160
1161 if (s->buf_end - s->buf < 2) {
1162 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1163 break;
1164 }
1165
1166 marker = bytestream_get_be16(&s->buf);
1167 oldbuf = s->buf;
1168
1169 if (marker == JPEG2000_EOC)
1170 break;
1171
1172 if (s->buf_end - s->buf < 2)
1173 return AVERROR(EINVAL);
1174 len = bytestream_get_be16(&s->buf);
1175 switch (marker) {
1176 case JPEG2000_SIZ:
1177 ret = get_siz(s);
1178 break;
1179 case JPEG2000_COC:
1180 ret = get_coc(s, codsty, properties);
1181 break;
1182 case JPEG2000_COD:
1183 ret = get_cod(s, codsty, properties);
1184 break;
1185 case JPEG2000_QCC:
1186 ret = get_qcc(s, len, qntsty, properties);
1187 break;
1188 case JPEG2000_QCD:
1189 ret = get_qcd(s, len, qntsty, properties);
1190 break;
1191 case JPEG2000_SOT:
1192 ret = get_sot(s, len);
1193 break;
1194 case JPEG2000_COM:
1195 // the comment is ignored
1196 s->buf += len - 2;
1197 break;
1198 case JPEG2000_TLM:
1199 // Tile-part lengths
1200 ret = get_tlm(s, len);
1201 break;
1202 default:
1203 av_log(s->avctx, AV_LOG_ERROR,
a349458e
DB		 1204 "unsupported marker 0x%.4X at pos 0x%tX\n",
1205 marker, s->buf - s->buf_start - 4);
c81a7063
NB		 1206 s->buf += len - 2;
1207 break;
1208 }
1209 if (((s->buf - oldbuf != len) && (marker != JPEG2000_SOT)) || ret) {
1210 av_log(s->avctx, AV_LOG_ERROR,
1211 "error during processing marker segment %.4x\n", marker);
1212 return ret ? ret : -1;
1213 }
1214 }
1215 return 0;
1216}
1217
1218/* Read bit stream packets --> T2 operation. */
1219static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1220{
1221 int ret = 0;
1222 Jpeg2000Tile *tile = s->tile + s->curtileno;
1223
1224 if (ret = init_tile(s, s->curtileno))
1225 return ret;
1226 if (ret = jpeg2000_decode_packets(s, tile))
1227 return ret;
1228
1229 return 0;
1230}
1231
1232static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1233{
1234 int32_t atom_size;
1235 int found_codestream = 0, search_range = 10;
1236
1237 // Skip JPEG 2000 signature atom.
1238 s->buf += 12;
1239
1240 while (!found_codestream && search_range) {
1241 atom_size = AV_RB32(s->buf);
1242 if (AV_RB32(s->buf + 4) == JP2_CODESTREAM) {
1243 found_codestream = 1;
1244 s->buf += 8;
1245 } else {
1246 s->buf += atom_size;
1247 search_range--;
1248 }
1249 }
1250
1251 if (found_codestream)
1252 return 1;
1253 return 0;
1254}
1255
1256static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1257 int *got_frame, AVPacket *avpkt)
1258{
1259 Jpeg2000DecoderContext *s = avctx->priv_data;
2e2d2466 1260 ThreadFrame frame = { .f = data };
c81a7063
NB		 1261 AVFrame *picture = data;
1262 int tileno, ret;
1263
1264 s->avctx = avctx;
1265 s->buf = s->buf_start = avpkt->data;
1266 s->buf_end = s->buf_start + avpkt->size;
1267 s->curtileno = 0; // TODO: only one tile in DCI JP2K. to implement for more tiles
1268
1269 // reduction factor, i.e number of resolution levels to skip
1270 s->reduction_factor = s->lowres;
1271
c81a7063
NB		 1272 if (s->buf_end - s->buf < 2)
1273 return AVERROR(EINVAL);
1274
1275 // check if the image is in jp2 format
1276 if ((AV_RB32(s->buf) == 12) &&
1277 (AV_RB32(s->buf + 4) == JP2_SIG_TYPE) &&
1278 (AV_RB32(s->buf + 8) == JP2_SIG_VALUE)) {
1279 if (!jp2_find_codestream(s)) {
1280 av_log(avctx, AV_LOG_ERROR,
1281 "couldn't find jpeg2k codestream atom\n");
1282 return -1;
1283 }
1284 }
1285
1286 if (bytestream_get_be16(&s->buf) != JPEG2000_SOC) {
1287 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1288 return -1;
1289 }
1290 if (ret = jpeg2000_read_main_headers(s))
45a1694f 1291 goto end;
c81a7063
NB		 1292
1293 /* get picture buffer */
2e2d2466
NB		 1294 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
1295 av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed.\n");
45a1694f 1296 goto end;
c81a7063
NB		 1297 }
1298 picture->pict_type = AV_PICTURE_TYPE_I;
1299 picture->key_frame = 1;
1300
1301 if (ret = jpeg2000_read_bitstream_packets(s))
45a1694f 1302 goto end;
c81a7063
NB		 1303 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1304 if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
45a1694f 1305 goto end;
c81a7063
NB		 1306
1307 *got_frame = 1;
1308
45a1694f
JG		 1309end:
1310 jpeg2000_dec_cleanup(s);
1311 return ret ? ret : s->buf - s->buf_start;
c81a7063
NB		 1312}
1313
70f96615
JG		 1314static void jpeg2000_init_static_data(AVCodec *codec)
1315{
1316 ff_jpeg2000_init_tier1_luts();
1317}
1318
c81a7063
NB		 1319#define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1320#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1321
1322static const AVOption options[] = {
1323 { "lowres", "Lower the decoding resolution by a power of two",
1324 OFFSET(lowres), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1325 { NULL },
1326};
1327
1328static const AVProfile profiles[] = {
1329 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
1330 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
1331 { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
1332 { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
1333 { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
1334 { FF_PROFILE_UNKNOWN },
1335};
1336
1337static const AVClass class = {
1338 .class_name = "jpeg2000",
1339 .item_name = av_default_item_name,
1340 .option = options,
1341 .version = LIBAVUTIL_VERSION_INT,
1342};
1343
1344AVCodec ff_jpeg2000_decoder = {
70f96615
JG		 1345 .name = "jpeg2000",
1346 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1347 .type = AVMEDIA_TYPE_VIDEO,
1348 .id = AV_CODEC_ID_JPEG2000,
1349 .capabilities = CODEC_CAP_FRAME_THREADS,
1350 .priv_data_size = sizeof(Jpeg2000DecoderContext),
1351 .init_static_data = jpeg2000_init_static_data,
1352 .decode = jpeg2000_decode_frame,
1353 .priv_class = &class,
7c57a582
AK		 1354 .pix_fmts = (enum AVPixelFormat[]) { AV_PIX_FMT_XYZ12,
1355 AV_PIX_FMT_GRAY8,
1356 -1 },
70f96615 1357 .profiles = NULL_IF_CONFIG_SMALL(profiles)
c81a7063 1358};
Libav master