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fate-jpeg2000-dcinema: force output to xyz12le
[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);
254 c->nreslevels = bytestream_get_byte(&s->buf) + 1; // num of resolution levels - 1
255
256 /* compute number of resolution levels to decode */
257 if (c->nreslevels < s->reduction_factor)
258 c->nreslevels2decode = 1;
259 else
260 c->nreslevels2decode = c->nreslevels - s->reduction_factor;
261
262 c->log2_cblk_width = bytestream_get_byte(&s->buf) + 2; // cblk width
263 c->log2_cblk_height = bytestream_get_byte(&s->buf) + 2; // cblk height
264
265 c->cblk_style = bytestream_get_byte(&s->buf);
266 if (c->cblk_style != 0) { // cblk style
267 av_log(s->avctx, AV_LOG_ERROR, "no extra cblk styles supported\n");
268 return -1;
269 }
270 c->transform = bytestream_get_byte(&s->buf); // DWT transformation type
271 /* set integer 9/7 DWT in case of BITEXACT flag */
272 if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
273 c->transform = FF_DWT97_INT;
274
275 if (c->csty & JPEG2000_CSTY_PREC) {
276 int i;
277 for (i = 0; i < c->nreslevels; i++) {
278 byte = bytestream_get_byte(&s->buf);
279 c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
280 c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
281 }
282 }
283 return 0;
284}
285
286/* get coding parameters for a particular tile or whole image*/
287static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
288 uint8_t *properties)
289{
290 Jpeg2000CodingStyle tmp;
291 int compno;
292
293 if (s->buf_end - s->buf < 5)
294 return AVERROR(EINVAL);
295
296 tmp.log2_prec_width =
297 tmp.log2_prec_height = 15;
298
299 tmp.csty = bytestream_get_byte(&s->buf);
300
301 // get progression order
302 tmp.prog_order = bytestream_get_byte(&s->buf);
303
304 tmp.nlayers = bytestream_get_be16(&s->buf);
305 tmp.mct = bytestream_get_byte(&s->buf); // multiple component transformation
306
307 get_cox(s, &tmp);
308 for (compno = 0; compno < s->ncomponents; compno++)
309 if (!(properties[compno] & HAD_COC))
310 memcpy(c + compno, &tmp, sizeof(tmp));
311 return 0;
312}
313
314/* Get coding parameters for a component in the whole image or a
315 * particular tile. */
316static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
317 uint8_t *properties)
318{
319 int compno;
320
321 if (s->buf_end - s->buf < 2)
322 return AVERROR(EINVAL);
323
324 compno = bytestream_get_byte(&s->buf);
325
326 c += compno;
327 c->csty = bytestream_get_byte(&s->buf);
328 get_cox(s, c);
329
330 properties[compno] |= HAD_COC;
331 return 0;
332}
333
334/* Get common part for QCD and QCC segments. */
335static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
336{
337 int i, x;
338
339 if (s->buf_end - s->buf < 1)
340 return AVERROR(EINVAL);
341
342 x = bytestream_get_byte(&s->buf); // Sqcd
343
344 q->nguardbits = x >> 5;
345 q->quantsty = x & 0x1f;
346
347 if (q->quantsty == JPEG2000_QSTY_NONE) {
348 n -= 3;
349 if (s->buf_end - s->buf < n)
350 return AVERROR(EINVAL);
351 for (i = 0; i < n; i++)
352 q->expn[i] = bytestream_get_byte(&s->buf) >> 3;
353 } else if (q->quantsty == JPEG2000_QSTY_SI) {
354 if (s->buf_end - s->buf < 2)
355 return AVERROR(EINVAL);
356 x = bytestream_get_be16(&s->buf);
357 q->expn[0] = x >> 11;
358 q->mant[0] = x & 0x7ff;
359 for (i = 1; i < 32 * 3; i++) {
360 int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
361 q->expn[i] = curexpn;
362 q->mant[i] = q->mant[0];
363 }
364 } else {
365 n = (n - 3) >> 1;
366 if (s->buf_end - s->buf < n)
367 return AVERROR(EINVAL);
368 for (i = 0; i < n; i++) {
369 x = bytestream_get_be16(&s->buf);
370 q->expn[i] = x >> 11;
371 q->mant[i] = x & 0x7ff;
372 }
373 }
374 return 0;
375}
376
377/* Get quantization parameters for a particular tile or a whole image. */
378static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
379 uint8_t *properties)
380{
381 Jpeg2000QuantStyle tmp;
382 int compno;
383
384 if (get_qcx(s, n, &tmp))
385 return -1;
386 for (compno = 0; compno < s->ncomponents; compno++)
387 if (!(properties[compno] & HAD_QCC))
388 memcpy(q + compno, &tmp, sizeof(tmp));
389 return 0;
390}
391
392/* Get quantization parameters for a component in the whole image
393 * on in a particular tile. */
394static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
395 uint8_t *properties)
396{
397 int compno;
398
399 if (s->buf_end - s->buf < 1)
400 return AVERROR(EINVAL);
401
402 compno = bytestream_get_byte(&s->buf);
403 properties[compno] |= HAD_QCC;
404 return get_qcx(s, n - 1, q + compno);
405}
406
407/* Get start of tile segment. */
408static uint8_t get_sot(Jpeg2000DecoderContext *s, int n)
409{
410 Jpeg2000TilePart *tp;
411 uint16_t Isot;
412 uint32_t Psot;
413 uint8_t TPsot;
414
415 if (s->buf_end - s->buf < 4)
416 return AVERROR(EINVAL);
417
418 Isot = bytestream_get_be16(&s->buf); // Isot
419 if (Isot) {
420 av_log(s->avctx, AV_LOG_ERROR,
421 "Not a DCINEMA JP2K file: more than one tile\n");
422 return -1;
423 }
424 Psot = bytestream_get_be32(&s->buf); // Psot
425 TPsot = bytestream_get_byte(&s->buf); // TPsot
426
427 /* Read TNSot but not used */
428 bytestream_get_byte(&s->buf); // TNsot
429
430 tp = s->tile[s->curtileno].tile_part + TPsot;
431 tp->tile_index = Isot;
432 tp->tp_len = Psot;
433 tp->tp_idx = TPsot;
434
435 /* Start of bit stream. Pointer to SOD marker
436 * Check SOD marker is present. */
437 if (JPEG2000_SOD == bytestream_get_be16(&s->buf))
438 tp->tp_start_bstrm = s->buf;
439 else {
440 av_log(s->avctx, AV_LOG_ERROR, "SOD marker not found \n");
441 return -1;
442 }
443
444 /* End address of bit stream =
445 * start address + (Psot - size of SOT HEADER(n)
446 * - size of SOT MARKER(2) - size of SOD marker(2) */
447 tp->tp_end_bstrm = s->buf + (tp->tp_len - n - 4);
448
449 // set buffer pointer to end of tile part header
450 s->buf = tp->tp_end_bstrm;
451
452 return 0;
453}
454
455/* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
456 * Used to know the number of tile parts and lengths.
457 * There may be multiple TLMs in the header.
458 * TODO: The function is not used for tile-parts management, nor anywhere else.
459 * It can be useful to allocate memory for tile parts, before managing the SOT
460 * markers. Parsing the TLM header is needed to increment the input header
461 * buffer.
462 * This marker is mandatory for DCI. */
463static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
464{
465 uint8_t Stlm, ST, SP, tile_tlm, i;
466 bytestream_get_byte(&s->buf); /* Ztlm: skipped */
467 Stlm = bytestream_get_byte(&s->buf);
468
469 // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
470 ST = (Stlm >> 4) & 0x03;
471 // TODO: Manage case of ST = 0b11 --> raise error
472 SP = (Stlm >> 6) & 0x01;
473 tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
474 for (i = 0; i < tile_tlm; i++) {
475 switch (ST) {
476 case 0:
477 break;
478 case 1:
479 bytestream_get_byte(&s->buf);
480 break;
481 case 2:
482 bytestream_get_be16(&s->buf);
483 break;
484 case 3:
485 bytestream_get_be32(&s->buf);
486 break;
487 }
488 if (SP == 0) {
489 bytestream_get_be16(&s->buf);
490 } else {
491 bytestream_get_be32(&s->buf);
492 }
493 }
494 return 0;
495}
496
497static int init_tile(Jpeg2000DecoderContext *s, int tileno)
498{
499 int compno;
500 int tilex = tileno % s->numXtiles;
501 int tiley = tileno / s->numXtiles;
502 Jpeg2000Tile *tile = s->tile + tileno;
503 Jpeg2000CodingStyle *codsty;
504 Jpeg2000QuantStyle *qntsty;
505
506 if (!tile->comp)
507 return AVERROR(ENOMEM);
508
509 /* copy codsty, qnsty to tile. TODO: Is it the best way?
510 * codsty, qnsty is an array of 4 structs Jpeg2000CodingStyle
511 * and Jpeg2000QuantStyle */
512 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(*codsty));
513 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(*qntsty));
514
515 for (compno = 0; compno < s->ncomponents; compno++) {
516 Jpeg2000Component *comp = tile->comp + compno;
517 int ret; // global bandno
518 codsty = tile->codsty + compno;
519 qntsty = tile->qntsty + compno;
520
521 comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
522 comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
523 comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
524 comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
525
526 // FIXME: add a dcinema profile check ?
527 // value is guaranteed by profile (orig=0, 1 tile)
528 comp->coord[0][0] = 0;
529 comp->coord[0][1] = s->avctx->width;
530 comp->coord[1][0] = 0;
531 comp->coord[1][1] = s->avctx->height;
532
533 if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
534 s->cbps[compno], s->cdx[compno],
535 s->cdy[compno], s->avctx))
536 return ret;
537 }
538 return 0;
539}
540
541/* Read the number of coding passes. */
542static int getnpasses(Jpeg2000DecoderContext *s)
543{
544 int num;
545 if (!get_bits(s, 1))
546 return 1;
547 if (!get_bits(s, 1))
548 return 2;
549 if ((num = get_bits(s, 2)) != 3)
550 return num < 0 ? num : 3 + num;
551 if ((num = get_bits(s, 5)) != 31)
552 return num < 0 ? num : 6 + num;
553 num = get_bits(s, 7);
554 return num < 0 ? num : 37 + num;
555}
556
557static int getlblockinc(Jpeg2000DecoderContext *s)
558{
559 int res = 0, ret;
560 while (ret = get_bits(s, 1)) {
561 if (ret < 0)
562 return ret;
563 res++;
564 }
565 return res;
566}
567
568static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
569 Jpeg2000CodingStyle *codsty,
570 Jpeg2000ResLevel *rlevel, int precno,
571 int layno, uint8_t *expn, int numgbits)
572{
573 int bandno, cblkno, ret, nb_code_blocks;
574
575 if (!(ret = get_bits(s, 1))) {
576 jpeg2000_flush(s);
577 return 0;
578 } else if (ret < 0)
579 return ret;
580
581 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
582 Jpeg2000Band *band = rlevel->band + bandno;
583 Jpeg2000Prec *prec = band->prec + precno;
584
585 if (band->coord[0][0] == band->coord[0][1] ||
586 band->coord[1][0] == band->coord[1][1])
587 continue;
588 prec->yi0 = 0;
589 prec->xi0 = 0;
590 nb_code_blocks = prec->nb_codeblocks_height *
591 prec->nb_codeblocks_width;
592 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
593 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
594 int incl, newpasses, llen;
595
596 if (cblk->npasses)
597 incl = get_bits(s, 1);
598 else
599 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
600 if (!incl)
601 continue;
602 else if (incl < 0)
603 return incl;
604
605 if (!cblk->npasses)
606 cblk->nonzerobits = expn[bandno] + numgbits - 1 -
607 tag_tree_decode(s, prec->zerobits + cblkno,
608 100);
609 if ((newpasses = getnpasses(s)) < 0)
610 return newpasses;
611 if ((llen = getlblockinc(s)) < 0)
612 return llen;
613 cblk->lblock += llen;
614 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
615 return ret;
616 cblk->lengthinc = ret;
617 cblk->npasses += newpasses;
618 }
619 }
620 jpeg2000_flush(s);
621
622 if (codsty->csty & JPEG2000_CSTY_EPH) {
623 if (AV_RB16(s->buf) == JPEG2000_EPH)
624 s->buf += 2;
625 else
626 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
627 }
628
629 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
630 Jpeg2000Band *band = rlevel->band + bandno;
631 Jpeg2000Prec *prec = band->prec + precno;
632
633 nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
634 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
635 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
636 if (s->buf_end - s->buf < cblk->lengthinc)
637 return AVERROR(EINVAL);
28816f9d
NB		 638 /* Code-block data can be empty. In that case initialize data
639 * with 0xFFFF. */
640 if (cblk->lengthinc > 0) {
641 bytestream_get_buffer(&s->buf, cblk->data, cblk->lengthinc);
642 } else {
643 cblk->data[0] = 0xFF;
644 cblk->data[1] = 0xFF;
645 }
c81a7063
NB		 646 cblk->length += cblk->lengthinc;
647 cblk->lengthinc = 0;
648 }
649 }
650 return 0;
651}
652
653static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
654{
655 int layno, reslevelno, compno, precno, ok_reslevel;
656 uint8_t prog_order = tile->codsty[0].prog_order;
657 uint16_t x;
658 uint16_t y;
659
660 s->bit_index = 8;
661 switch (prog_order) {
662 case JPEG2000_PGOD_LRCP:
663 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
664 ok_reslevel = 1;
665 for (reslevelno = 0; ok_reslevel; reslevelno++) {
666 ok_reslevel = 0;
667 for (compno = 0; compno < s->ncomponents; compno++) {
668 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
669 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
670 if (reslevelno < codsty->nreslevels) {
671 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
672 reslevelno;
673 ok_reslevel = 1;
674 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
675 if (jpeg2000_decode_packet(s,
676 codsty, rlevel,
677 precno, layno,
678 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
679 qntsty->nguardbits))
680 return -1;
681 }
682 }
683 }
684 }
685 break;
686
687 case JPEG2000_PGOD_CPRL:
688 for (compno = 0; compno < s->ncomponents; compno++) {
689 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
690 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
691
692 /* Set bit stream buffer address according to tile-part.
693 * For DCinema one tile-part per component, so can be
694 * indexed by component. */
695 s->buf = tile->tile_part[compno].tp_start_bstrm;
696
697 /* Position loop (y axis)
698 * TODO: Automate computing of step 256.
699 * Fixed here, but to be computed before entering here. */
700 for (y = 0; y < s->height; y += 256) {
701 /* Position loop (y axis)
702 * TODO: automate computing of step 256.
703 * Fixed here, but to be computed before entering here. */
704 for (x = 0; x < s->width; x += 256) {
705 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
706 uint16_t prcx, prcy;
707 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
708 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
709
710 if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
711 (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
712 continue;
713
714 if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
715 (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
716 continue;
717
718 // check if a precinct exists
719 prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
720 prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
721 precno = prcx + rlevel->num_precincts_x * prcy;
722 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
723 if (jpeg2000_decode_packet(s, codsty, rlevel,
724 precno, layno,
725 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
726 qntsty->nguardbits))
727 return -1;
728 }
729 }
730 }
731 }
732 }
733 break;
734
735 default:
736 break;
737 }
738
739 /* EOC marker reached */
740 s->buf += 2;
741
742 return 0;
743}
744
745/* TIER-1 routines */
746static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
747 int bpno, int bandno)
748{
749 int mask = 3 << (bpno - 1), y0, x, y;
750
751 for (y0 = 0; y0 < height; y0 += 4)
752 for (x = 0; x < width; x++)
753 for (y = y0; y < height && y < y0 + 4; y++)
754 if ((t1->flags[y + 1][x + 1] & JPEG2000_T1_SIG_NB)
755 && !(t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
756 if (ff_mqc_decode(&t1->mqc,
757 t1->mqc.cx_states +
758 ff_jpeg2000_getsigctxno(t1->flags[y + 1][x + 1],
759 bandno))) {
760 int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
761 &xorbit);
762
763 t1->data[y][x] =
764 (ff_mqc_decode(&t1->mqc,
765 t1->mqc.cx_states + ctxno) ^ xorbit)
766 ? -mask : mask;
767
768 ff_jpeg2000_set_significance(t1, x, y,
769 t1->data[y][x] < 0);
770 }
771 t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
772 }
773}
774
775static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
776 int bpno)
777{
778 int phalf, nhalf;
779 int y0, x, y;
780
781 phalf = 1 << (bpno - 1);
782 nhalf = -phalf;
783
784 for (y0 = 0; y0 < height; y0 += 4)
785 for (x = 0; x < width; x++)
786 for (y = y0; y < height && y < y0 + 4; y++)
787 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
788 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
789 int r = ff_mqc_decode(&t1->mqc,
790 t1->mqc.cx_states + ctxno)
791 ? phalf : nhalf;
792 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
793 t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
794 }
795}
796
797static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
798 int width, int height, int bpno, int bandno,
799 int seg_symbols)
800{
801 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
802
803 for (y0 = 0; y0 < height; y0 += 4)
804 for (x = 0; x < width; x++) {
805 if (y0 + 3 < height &&
806 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
807 (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
808 (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
809 (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
810 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
811 continue;
812 runlen = ff_mqc_decode(&t1->mqc,
813 t1->mqc.cx_states + MQC_CX_UNI);
814 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
815 t1->mqc.cx_states +
816 MQC_CX_UNI);
817 dec = 1;
818 } else {
819 runlen = 0;
820 dec = 0;
821 }
822
823 for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
824 if (!dec) {
825 if (!(t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)))
826 dec = ff_mqc_decode(&t1->mqc,
827 t1->mqc.cx_states +
828 ff_jpeg2000_getsigctxno(t1->flags[y + 1][x + 1],
829 bandno));
830 }
831 if (dec) {
832 int xorbit;
833 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
834 &xorbit);
835 t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
836 t1->mqc.cx_states + ctxno) ^
837 xorbit)
838 ? -mask : mask;
839 ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
840 }
841 dec = 0;
842 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
843 }
844 }
845 if (seg_symbols) {
846 int val;
847 val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
848 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
849 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
850 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
851 if (val != 0xa)
852 av_log(s->avctx, AV_LOG_ERROR,
853 "Segmentation symbol value incorrect\n");
854 }
855}
856
857static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
858 Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
859 int width, int height, int bandpos)
860{
861 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
862
c81a7063
NB		 863 for (y = 0; y < height; y++)
864 memset(t1->data[y], 0, width * sizeof(width));
28816f9d
NB		 865 /* If code-block contains no compressed data: nothing to do. */
866 if (!cblk->length)
867 return 0;
868 for (y = 0; y < height + 2; y++)
869 memset(t1->flags[y], 0, (width + 2) * sizeof(width));
c81a7063
NB		 870
871 ff_mqc_initdec(&t1->mqc, cblk->data);
872 cblk->data[cblk->length] = 0xff;
873 cblk->data[cblk->length + 1] = 0xff;
874
875 while (passno--) {
876 switch (pass_t) {
877 case 0:
878 decode_sigpass(t1, width, height, bpno + 1, bandpos);
879 break;
880 case 1:
881 decode_refpass(t1, width, height, bpno + 1);
882 break;
883 case 2:
884 decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
885 codsty->cblk_style & JPEG2000_CBLK_SEGSYM);
886 break;
887 }
888
889 pass_t++;
890 if (pass_t == 3) {
891 bpno--;
892 pass_t = 0;
893 }
894 }
895 return 0;
896}
897
898/* TODO: Verify dequantization for lossless case
899 * comp->data can be float or int
900 * band->stepsize can be float or int
901 * depending on the type of DWT transformation.
902 * see ISO/IEC 15444-1:2002 A.6.1 */
903
904/* Float dequantization of a codeblock.*/
905static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
906 Jpeg2000Component *comp,
907 Jpeg2000T1Context *t1, Jpeg2000Band *band)
908{
909 int i, j, idx;
910 float *datap = &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
911 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
912 for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
913 idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
914 datap[idx] = (float)(t1->data[j][i]) * ((float)band->stepsize);
915 }
916 return;
917}
918
919/* Integer dequantization of a codeblock.*/
920static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
921 Jpeg2000Component *comp,
922 Jpeg2000T1Context *t1, Jpeg2000Band *band)
923{
924 int i, j, idx;
925 int32_t *datap =
926 (int32_t *) &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
927 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
928 for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
929 idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
930 datap[idx] =
931 ((int32_t)(t1->data[j][i]) * ((int32_t)band->stepsize) + (1 << 15)) >> 16;
932 }
933 return;
934}
935
936/* Inverse ICT parameters in float and integer.
937 * int value = (float value) * (1<<16) */
938static const float f_ict_params[4] = {
939 1.402f,
940 0.34413f,
941 0.71414f,
942 1.772f
943};
944static const int i_ict_params[4] = {
945 91881,
946 22553,
947 46802,
948 116130
949};
950
951static int mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
952{
953 int i, csize = 1;
954 int ret = 0;
955 int32_t *src[3], i0, i1, i2;
956 float *srcf[3], i0f, i1f, i2f;
957
958 for (i = 0; i < 3; i++)
959 if (tile->codsty[0].transform == FF_DWT97)
960 srcf[i] = tile->comp[i].data;
961 else
962 src[i] = (int32_t *)tile->comp[i].data;
963
964 for (i = 0; i < 2; i++)
965 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
966 switch (tile->codsty[0].transform) {
967 case FF_DWT97:
968 for (i = 0; i < csize; i++) {
969 i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
970 i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
971 - (f_ict_params[2] * *srcf[2]);
972 i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
973 *srcf[0]++ = i0f;
974 *srcf[1]++ = i1f;
975 *srcf[2]++ = i2f;
976 }
977 break;
978 case FF_DWT97_INT:
979 for (i = 0; i < csize; i++) {
980 i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
981 i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
982 - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
983 i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
984 *src[0]++ = i0;
985 *src[1]++ = i1;
986 *src[2]++ = i2;
987 }
988 break;
989 case FF_DWT53:
990 for (i = 0; i < csize; i++) {
991 i1 = *src[0] - (*src[2] + *src[1] >> 2);
992 i0 = i1 + *src[2];
993 i2 = i1 + *src[1];
994 *src[0]++ = i0;
995 *src[1]++ = i1;
996 *src[2]++ = i2;
997 }
998 break;
999 }
1000 return ret;
1001}
1002
1003static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1004 AVFrame *picture)
1005{
1006 int compno, reslevelno, bandno;
1007 int x, y;
1008
1009 uint8_t *line;
1010 Jpeg2000T1Context t1;
1011 /* Loop on tile components */
1012
1013 for (compno = 0; compno < s->ncomponents; compno++) {
1014 Jpeg2000Component *comp = tile->comp + compno;
1015 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1016 /* Loop on resolution levels */
1017 for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1018 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1019 /* Loop on bands */
1020 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1021 uint16_t nb_precincts, precno;
1022 Jpeg2000Band *band = rlevel->band + bandno;
1023 int cblkno = 0, bandpos;
1024 bandpos = bandno + (reslevelno > 0);
1025
1026 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1027 /* Loop on precincts */
1028 for (precno = 0; precno < nb_precincts; precno++) {
1029 Jpeg2000Prec *prec = band->prec + precno;
1030
1031 /* Loop on codeblocks */
1032 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1033 int x, y;
1034 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1035 decode_cblk(s, codsty, &t1, cblk,
1036 cblk->coord[0][1] - cblk->coord[0][0],
1037 cblk->coord[1][1] - cblk->coord[1][0],
1038 bandpos);
1039
1040 /* Manage band offsets */
1041 x = cblk->coord[0][0];
1042 y = cblk->coord[1][0];
1043 if ((reslevelno > 0) && ((bandno + 1) & 1)) {
1044 Jpeg2000ResLevel *pres = comp->reslevel + (reslevelno - 1);
1045 x += pres->coord[0][1] - pres->coord[0][0];
1046 }
1047 if ((reslevelno > 0) && ((bandno + 1) & 2)) {
1048 Jpeg2000ResLevel *pres = comp->reslevel + (reslevelno - 1);
1049 y += pres->coord[1][1] - pres->coord[1][0];
1050 }
1051
1052 if (s->avctx->flags & CODEC_FLAG_BITEXACT)
1053 dequantization_int(x, y, cblk, comp, &t1, band);
1054 else
1055 dequantization_float(x, y, cblk, comp, &t1, band);
1056 } /* end cblk */
1057 } /*end prec */
1058 } /* end band */
1059 } /* end reslevel */
1060
1061 /* inverse DWT */
1062 ff_dwt_decode(&comp->dwt, comp->data);
1063 } /*end comp */
1064
1065 /* inverse MCT transformation */
1066 if (tile->codsty[0].mct)
1067 mct_decode(s, tile);
1068
1069 if (s->avctx->pix_fmt == PIX_FMT_BGRA) // RGBA -> BGRA
1070 FFSWAP(float *, tile->comp[0].data, tile->comp[2].data);
1071
1072 if (s->precision <= 8) {
1073 for (compno = 0; compno < s->ncomponents; compno++) {
1074 Jpeg2000Component *comp = tile->comp + compno;
1075 int32_t *datap = (int32_t *)comp->data;
1076 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1077 line = picture->data[0] + y * picture->linesize[0];
1078 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1079 uint8_t *dst;
1080
1081 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1082 dst = line + x * s->ncomponents + compno;
1083
1084 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) {
1085 *datap += 1 << (s->cbps[compno] - 1);
1086 if (*datap < 0)
1087 *datap = 0;
1088 else if (*datap >= (1 << s->cbps[compno]))
1089 *datap = (1 << s->cbps[compno]) - 1;
1090 *dst = *datap++;
1091 dst += s->ncomponents;
1092 }
1093 line += picture->linesize[0];
1094 }
1095 }
1096 } else {
1097 for (compno = 0; compno < s->ncomponents; compno++) {
1098 Jpeg2000Component *comp = tile->comp + compno;
1099 float *datap = comp->data;
1100 int32_t *i_datap = (int32_t *) comp->data;
1101 uint16_t *linel;
1102
1103 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1104 linel = (uint16_t *)picture->data[0] + y * (picture->linesize[0] >> 1);
1105 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1106 uint16_t *dst;
1107 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1108 dst = linel + (x * s->ncomponents + compno);
1109 for (; x < s->avctx->width; x += s->cdx[compno]) {
1110 int16_t val;
1111 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1112 if (s->avctx->flags & CODEC_FLAG_BITEXACT)
1113 val = *i_datap + (1 << (s->cbps[compno] - 1));
1114 else
1115 val = lrintf(*datap) + (1 << (s->cbps[compno] - 1));
1116 val = av_clip(val, 0, (1 << s->cbps[compno]) - 1);
1117 /* align 12 bit values in little-endian mode */
1118 *dst = val << 4;
1119 datap++;
1120 i_datap++;
1121 dst += s->ncomponents;
1122 }
1123 linel += picture->linesize[0] >> 1;
1124 }
1125 }
1126 }
1127 return 0;
1128}
1129
1130static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1131{
1132 int tileno, compno;
1133 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1134 for (compno = 0; compno < s->ncomponents; compno++) {
1135 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1136 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1137
1138 ff_jpeg2000_cleanup(comp, codsty);
1139 }
1140 av_freep(&s->tile[tileno].comp);
1141 }
1142 av_freep(&s->tile);
1143}
1144
1145static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1146{
1147 Jpeg2000CodingStyle *codsty = s->codsty;
1148 Jpeg2000QuantStyle *qntsty = s->qntsty;
1149 uint8_t *properties = s->properties;
1150
1151 for (;;) {
1152 int len, ret = 0;
1153 uint16_t marker;
1154 const uint8_t *oldbuf;
1155
1156 if (s->buf_end - s->buf < 2) {
1157 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1158 break;
1159 }
1160
1161 marker = bytestream_get_be16(&s->buf);
1162 oldbuf = s->buf;
1163
1164 if (marker == JPEG2000_EOC)
1165 break;
1166
1167 if (s->buf_end - s->buf < 2)
1168 return AVERROR(EINVAL);
1169 len = bytestream_get_be16(&s->buf);
1170 switch (marker) {
1171 case JPEG2000_SIZ:
1172 ret = get_siz(s);
1173 break;
1174 case JPEG2000_COC:
1175 ret = get_coc(s, codsty, properties);
1176 break;
1177 case JPEG2000_COD:
1178 ret = get_cod(s, codsty, properties);
1179 break;
1180 case JPEG2000_QCC:
1181 ret = get_qcc(s, len, qntsty, properties);
1182 break;
1183 case JPEG2000_QCD:
1184 ret = get_qcd(s, len, qntsty, properties);
1185 break;
1186 case JPEG2000_SOT:
1187 ret = get_sot(s, len);
1188 break;
1189 case JPEG2000_COM:
1190 // the comment is ignored
1191 s->buf += len - 2;
1192 break;
1193 case JPEG2000_TLM:
1194 // Tile-part lengths
1195 ret = get_tlm(s, len);
1196 break;
1197 default:
1198 av_log(s->avctx, AV_LOG_ERROR,
1199 "unsupported marker 0x%.4X at pos 0x%lX\n",
1200 marker, (uint64_t)(s->buf - s->buf_start - 4));
1201 s->buf += len - 2;
1202 break;
1203 }
1204 if (((s->buf - oldbuf != len) && (marker != JPEG2000_SOT)) || ret) {
1205 av_log(s->avctx, AV_LOG_ERROR,
1206 "error during processing marker segment %.4x\n", marker);
1207 return ret ? ret : -1;
1208 }
1209 }
1210 return 0;
1211}
1212
1213/* Read bit stream packets --> T2 operation. */
1214static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1215{
1216 int ret = 0;
1217 Jpeg2000Tile *tile = s->tile + s->curtileno;
1218
1219 if (ret = init_tile(s, s->curtileno))
1220 return ret;
1221 if (ret = jpeg2000_decode_packets(s, tile))
1222 return ret;
1223
1224 return 0;
1225}
1226
1227static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1228{
1229 int32_t atom_size;
1230 int found_codestream = 0, search_range = 10;
1231
1232 // Skip JPEG 2000 signature atom.
1233 s->buf += 12;
1234
1235 while (!found_codestream && search_range) {
1236 atom_size = AV_RB32(s->buf);
1237 if (AV_RB32(s->buf + 4) == JP2_CODESTREAM) {
1238 found_codestream = 1;
1239 s->buf += 8;
1240 } else {
1241 s->buf += atom_size;
1242 search_range--;
1243 }
1244 }
1245
1246 if (found_codestream)
1247 return 1;
1248 return 0;
1249}
1250
1251static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1252 int *got_frame, AVPacket *avpkt)
1253{
1254 Jpeg2000DecoderContext *s = avctx->priv_data;
2e2d2466 1255 ThreadFrame frame = { .f = data };
c81a7063
NB		 1256 AVFrame *picture = data;
1257 int tileno, ret;
1258
1259 s->avctx = avctx;
1260 s->buf = s->buf_start = avpkt->data;
1261 s->buf_end = s->buf_start + avpkt->size;
1262 s->curtileno = 0; // TODO: only one tile in DCI JP2K. to implement for more tiles
1263
1264 // reduction factor, i.e number of resolution levels to skip
1265 s->reduction_factor = s->lowres;
1266
1267 ff_jpeg2000_init_tier1_luts();
1268
1269 if (s->buf_end - s->buf < 2)
1270 return AVERROR(EINVAL);
1271
1272 // check if the image is in jp2 format
1273 if ((AV_RB32(s->buf) == 12) &&
1274 (AV_RB32(s->buf + 4) == JP2_SIG_TYPE) &&
1275 (AV_RB32(s->buf + 8) == JP2_SIG_VALUE)) {
1276 if (!jp2_find_codestream(s)) {
1277 av_log(avctx, AV_LOG_ERROR,
1278 "couldn't find jpeg2k codestream atom\n");
1279 return -1;
1280 }
1281 }
1282
1283 if (bytestream_get_be16(&s->buf) != JPEG2000_SOC) {
1284 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1285 return -1;
1286 }
1287 if (ret = jpeg2000_read_main_headers(s))
1288 return ret;
1289
1290 /* get picture buffer */
2e2d2466
NB		 1291 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
1292 av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed.\n");
c81a7063
NB		 1293 return ret;
1294 }
1295 picture->pict_type = AV_PICTURE_TYPE_I;
1296 picture->key_frame = 1;
1297
1298 if (ret = jpeg2000_read_bitstream_packets(s))
1299 return ret;
1300 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1301 if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
1302 return ret;
1303 jpeg2000_dec_cleanup(s);
1304
1305 *got_frame = 1;
1306
1307 return s->buf - s->buf_start;
1308}
1309
1310#define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1311#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1312
1313static const AVOption options[] = {
1314 { "lowres", "Lower the decoding resolution by a power of two",
1315 OFFSET(lowres), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1316 { NULL },
1317};
1318
1319static const AVProfile profiles[] = {
1320 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
1321 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
1322 { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
1323 { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
1324 { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
1325 { FF_PROFILE_UNKNOWN },
1326};
1327
1328static const AVClass class = {
1329 .class_name = "jpeg2000",
1330 .item_name = av_default_item_name,
1331 .option = options,
1332 .version = LIBAVUTIL_VERSION_INT,
1333};
1334
1335AVCodec ff_jpeg2000_decoder = {
1336 .name = "jpeg2000",
1337 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1338 .type = AVMEDIA_TYPE_VIDEO,
1339 .id = AV_CODEC_ID_JPEG2000,
2e2d2466 1340 .capabilities = CODEC_CAP_FRAME_THREADS,
c81a7063
NB		 1341 .priv_data_size = sizeof(Jpeg2000DecoderContext),
1342 .decode = jpeg2000_decode_frame,
1343 .priv_class = &class,
1344 .pix_fmts = (enum PixelFormat[]) { AV_PIX_FMT_XYZ12,
1345 AV_PIX_FMT_GRAY8,
1346 -1 },
1347 .profiles = NULL_IF_CONFIG_SMALL(profiles)
1348};
Libav master