jpeg2000: Do not assume a single tile
[libav.git] / libavcodec / jpeg2000dec.c
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"
33 #include "thread.h"
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
43 typedef struct Jpeg2000TilePart {
44 uint8_t tile_index; // Tile index who refers the tile-part
45 const uint8_t *tp_end;
46 GetByteContext tpg; // bit stream in tile-part
47 } Jpeg2000TilePart;
48
49 /* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
50 * one per component, so tile_part elements have a size of 3 */
51 typedef struct Jpeg2000Tile {
52 Jpeg2000Component *comp;
53 uint8_t properties[4];
54 Jpeg2000CodingStyle codsty[4];
55 Jpeg2000QuantStyle qntsty[4];
56 Jpeg2000TilePart tile_part[3];
57 uint16_t tp_idx; // Tile-part index
58 } Jpeg2000Tile;
59
60 typedef struct Jpeg2000DecoderContext {
61 AVClass *class;
62 AVCodecContext *avctx;
63 GetByteContext g;
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 unsigned numXtiles, numYtiles;
76 int maxtilelen;
77
78 Jpeg2000CodingStyle codsty[4];
79 Jpeg2000QuantStyle qntsty[4];
80
81 int bit_index;
82
83 int16_t curtileno;
84 Jpeg2000Tile *tile;
85
86 /*options parameters*/
87 int reduction_factor;
88 } Jpeg2000DecoderContext;
89
90 /* get_bits functions for JPEG2000 packet bitstream
91 * It is a get_bit function with a bit-stuffing routine. If the value of the
92 * byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB.
93 * cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */
94 static int get_bits(Jpeg2000DecoderContext *s, int n)
95 {
96 int res = 0;
97 while (--n >= 0) {
98 res <<= 1;
99 if (s->bit_index == 0) {
100 s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);
101 }
102 s->bit_index--;
103 res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;
104 }
105 return res;
106 }
107
108 static void jpeg2000_flush(Jpeg2000DecoderContext *s)
109 {
110 if (bytestream2_get_byte(&s->g) == 0xff)
111 bytestream2_skip(&s->g, 1);
112 s->bit_index = 8;
113 }
114
115 /* decode the value stored in node */
116 static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node,
117 int threshold)
118 {
119 Jpeg2000TgtNode *stack[30];
120 int sp = -1, curval = 0;
121
122 if (!node)
123 return AVERROR_INVALIDDATA;
124
125 while (node && !node->vis) {
126 stack[++sp] = node;
127 node = node->parent;
128 }
129
130 if (node)
131 curval = node->val;
132 else
133 curval = stack[sp]->val;
134
135 while (curval < threshold && sp >= 0) {
136 if (curval < stack[sp]->val)
137 curval = stack[sp]->val;
138 while (curval < threshold) {
139 int ret;
140 if ((ret = get_bits(s, 1)) > 0) {
141 stack[sp]->vis++;
142 break;
143 } else if (!ret)
144 curval++;
145 else
146 return ret;
147 }
148 stack[sp]->val = curval;
149 sp--;
150 }
151 return curval;
152 }
153
154 /* marker segments */
155 /* get sizes and offsets of image, tiles; number of components */
156 static int get_siz(Jpeg2000DecoderContext *s)
157 {
158 int i;
159 int ncomponents;
160
161 if (bytestream2_get_bytes_left(&s->g) < 36)
162 return AVERROR_INVALIDDATA;
163
164 s->avctx->profile = bytestream2_get_be16u(&s->g); // Rsiz
165 s->width = bytestream2_get_be32u(&s->g); // Width
166 s->height = bytestream2_get_be32u(&s->g); // Height
167 s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz
168 s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz
169 s->tile_width = bytestream2_get_be32u(&s->g); // XTSiz
170 s->tile_height = bytestream2_get_be32u(&s->g); // YTSiz
171 s->tile_offset_x = bytestream2_get_be32u(&s->g); // XT0Siz
172 s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz
173 ncomponents = bytestream2_get_be16u(&s->g); // CSiz
174
175 if (ncomponents <= 0) {
176 av_log(s->avctx, AV_LOG_ERROR, "Invalid number of components: %d\n",
177 s->ncomponents);
178 return AVERROR_INVALIDDATA;
179 }
180
181 if (ncomponents > 3) {
182 avpriv_request_sample(s->avctx, "Support for %d components",
183 s->ncomponents);
184 return AVERROR_PATCHWELCOME;
185 }
186
187 s->ncomponents = ncomponents;
188
189 if (s->tile_width <= 0 || s->tile_height <= 0 ||
190 s->tile_width > s->width || s->tile_height > s->height) {
191 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile dimension %dx%d.\n",
192 s->tile_width, s->tile_height);
193 return AVERROR_INVALIDDATA;
194 }
195
196 if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents)
197 return AVERROR_INVALIDDATA;
198
199 for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
200 uint8_t x = bytestream2_get_byteu(&s->g);
201 s->cbps[i] = (x & 0x7f) + 1;
202 s->precision = FFMAX(s->cbps[i], s->precision);
203 s->sgnd[i] = !!(x & 0x80);
204 s->cdx[i] = bytestream2_get_byteu(&s->g);
205 s->cdy[i] = bytestream2_get_byteu(&s->g);
206
207 if (s->cdx[i] != 1 || s->cdy[i] != 1) {
208 avpriv_request_sample(s->avctx,
209 "CDxy values %d %d for component %d",
210 s->cdx[i], s->cdy[i], i);
211 if (!s->cdx[i] || !s->cdy[i])
212 return AVERROR_INVALIDDATA;
213 else
214 return AVERROR_PATCHWELCOME;
215 }
216 }
217
218 s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
219 s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
220
221 s->tile = av_mallocz_array(s->numXtiles * s->numYtiles, sizeof(*s->tile));
222 if (!s->tile) {
223 s->numXtiles = s->numYtiles = 0;
224 return AVERROR(ENOMEM);
225 }
226
227 for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
228 Jpeg2000Tile *tile = s->tile + i;
229
230 tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
231 if (!tile->comp)
232 return AVERROR(ENOMEM);
233 }
234
235 /* compute image size with reduction factor */
236 s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x,
237 s->reduction_factor);
238 s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
239 s->reduction_factor);
240
241 switch (s->ncomponents) {
242 case 1:
243 if (s->precision > 8)
244 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
245 else
246 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
247 break;
248 case 3:
249 switch (s->avctx->profile) {
250 case FF_PROFILE_JPEG2000_DCINEMA_2K:
251 case FF_PROFILE_JPEG2000_DCINEMA_4K:
252 /* XYZ color-space for digital cinema profiles */
253 s->avctx->pix_fmt = AV_PIX_FMT_XYZ12;
254 break;
255 default:
256 if (s->precision > 8)
257 s->avctx->pix_fmt = AV_PIX_FMT_RGB48;
258 else
259 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
260 break;
261 }
262 break;
263 case 4:
264 s->avctx->pix_fmt = AV_PIX_FMT_RGBA;
265 break;
266 default:
267 /* pixel format can not be identified */
268 s->avctx->pix_fmt = AV_PIX_FMT_NONE;
269 break;
270 }
271 return 0;
272 }
273
274 /* get common part for COD and COC segments */
275 static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
276 {
277 uint8_t byte;
278
279 if (bytestream2_get_bytes_left(&s->g) < 5)
280 return AVERROR_INVALIDDATA;
281
282 /* nreslevels = number of resolution levels
283 = number of decomposition level +1 */
284 c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
285
286 if (c->nreslevels > JPEG2000_MAX_RESLEVELS)
287 return AVERROR_INVALIDDATA;
288
289 /* compute number of resolution levels to decode */
290 if (c->nreslevels < s->reduction_factor)
291 c->nreslevels2decode = 1;
292 else
293 c->nreslevels2decode = c->nreslevels - s->reduction_factor;
294
295 c->log2_cblk_width = bytestream2_get_byteu(&s->g) + 2; // cblk width
296 c->log2_cblk_height = bytestream2_get_byteu(&s->g) + 2; // cblk height
297
298 if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
299 c->log2_cblk_width + c->log2_cblk_height > 12) {
300 av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
301 return AVERROR_INVALIDDATA;
302 }
303
304 c->cblk_style = bytestream2_get_byteu(&s->g);
305 if (c->cblk_style != 0) { // cblk style
306 avpriv_request_sample(s->avctx, "Support for extra cblk styles");
307 return AVERROR_PATCHWELCOME;
308 }
309 c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
310 /* set integer 9/7 DWT in case of BITEXACT flag */
311 if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
312 c->transform = FF_DWT97_INT;
313
314 if (c->csty & JPEG2000_CSTY_PREC) {
315 int i;
316 for (i = 0; i < c->nreslevels; i++) {
317 byte = bytestream2_get_byte(&s->g);
318 c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
319 c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
320 }
321 } else {
322 memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
323 memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
324 }
325 return 0;
326 }
327
328 /* get coding parameters for a particular tile or whole image*/
329 static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
330 uint8_t *properties)
331 {
332 Jpeg2000CodingStyle tmp;
333 int compno, ret;
334
335 if (bytestream2_get_bytes_left(&s->g) < 5)
336 return AVERROR_INVALIDDATA;
337
338 tmp.csty = bytestream2_get_byteu(&s->g);
339
340 // get progression order
341 tmp.prog_order = bytestream2_get_byteu(&s->g);
342
343 tmp.nlayers = bytestream2_get_be16u(&s->g);
344 tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
345
346 if (tmp.mct && s->ncomponents < 3) {
347 av_log(s->avctx, AV_LOG_ERROR,
348 "MCT %d with too few components (%d)\n",
349 tmp.mct, s->ncomponents);
350 return AVERROR_INVALIDDATA;
351 }
352
353 if ((ret = get_cox(s, &tmp)) < 0)
354 return ret;
355
356 for (compno = 0; compno < s->ncomponents; compno++)
357 if (!(properties[compno] & HAD_COC))
358 memcpy(c + compno, &tmp, sizeof(tmp));
359 return 0;
360 }
361
362 /* Get coding parameters for a component in the whole image or a
363 * particular tile. */
364 static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
365 uint8_t *properties)
366 {
367 int compno, ret;
368
369 if (bytestream2_get_bytes_left(&s->g) < 2)
370 return AVERROR_INVALIDDATA;
371
372 compno = bytestream2_get_byteu(&s->g);
373
374 if (compno >= s->ncomponents) {
375 av_log(s->avctx, AV_LOG_ERROR,
376 "Invalid compno %d. There are %d components in the image.\n",
377 compno, s->ncomponents);
378 return AVERROR_INVALIDDATA;
379 }
380
381 c += compno;
382 c->csty = bytestream2_get_byteu(&s->g);
383
384 if ((ret = get_cox(s, c)) < 0)
385 return ret;
386
387 properties[compno] |= HAD_COC;
388 return 0;
389 }
390
391 /* Get common part for QCD and QCC segments. */
392 static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
393 {
394 int i, x;
395
396 if (bytestream2_get_bytes_left(&s->g) < 1)
397 return AVERROR_INVALIDDATA;
398
399 x = bytestream2_get_byteu(&s->g); // Sqcd
400
401 q->nguardbits = x >> 5;
402 q->quantsty = x & 0x1f;
403
404 if (q->quantsty == JPEG2000_QSTY_NONE) {
405 n -= 3;
406 if (bytestream2_get_bytes_left(&s->g) < n ||
407 n > JPEG2000_MAX_DECLEVELS)
408 return AVERROR_INVALIDDATA;
409 for (i = 0; i < n; i++)
410 q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
411 } else if (q->quantsty == JPEG2000_QSTY_SI) {
412 if (bytestream2_get_bytes_left(&s->g) < 2)
413 return AVERROR_INVALIDDATA;
414 x = bytestream2_get_be16u(&s->g);
415 q->expn[0] = x >> 11;
416 q->mant[0] = x & 0x7ff;
417 for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
418 int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
419 q->expn[i] = curexpn;
420 q->mant[i] = q->mant[0];
421 }
422 } else {
423 n = (n - 3) >> 1;
424 if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
425 n > JPEG2000_MAX_DECLEVELS)
426 return AVERROR_INVALIDDATA;
427 for (i = 0; i < n; i++) {
428 x = bytestream2_get_be16u(&s->g);
429 q->expn[i] = x >> 11;
430 q->mant[i] = x & 0x7ff;
431 }
432 }
433 return 0;
434 }
435
436 /* Get quantization parameters for a particular tile or a whole image. */
437 static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
438 uint8_t *properties)
439 {
440 Jpeg2000QuantStyle tmp;
441 int compno, ret;
442
443 if ((ret = get_qcx(s, n, &tmp)) < 0)
444 return ret;
445 for (compno = 0; compno < s->ncomponents; compno++)
446 if (!(properties[compno] & HAD_QCC))
447 memcpy(q + compno, &tmp, sizeof(tmp));
448 return 0;
449 }
450
451 /* Get quantization parameters for a component in the whole image
452 * on in a particular tile. */
453 static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
454 uint8_t *properties)
455 {
456 int compno;
457
458 if (bytestream2_get_bytes_left(&s->g) < 1)
459 return AVERROR_INVALIDDATA;
460
461 compno = bytestream2_get_byteu(&s->g);
462
463 if (compno >= s->ncomponents) {
464 av_log(s->avctx, AV_LOG_ERROR,
465 "Invalid compno %d. There are %d components in the image.\n",
466 compno, s->ncomponents);
467 return AVERROR_INVALIDDATA;
468 }
469
470 properties[compno] |= HAD_QCC;
471 return get_qcx(s, n - 1, q + compno);
472 }
473
474 /* Get start of tile segment. */
475 static int get_sot(Jpeg2000DecoderContext *s, int n)
476 {
477 Jpeg2000TilePart *tp;
478 uint16_t Isot;
479 uint32_t Psot;
480 uint8_t TPsot;
481
482 if (bytestream2_get_bytes_left(&s->g) < 8)
483 return AVERROR_INVALIDDATA;
484
485 Isot = bytestream2_get_be16u(&s->g); // Isot
486 if (Isot >= s->numXtiles * s->numYtiles)
487 return AVERROR_INVALIDDATA;
488
489 if (Isot) {
490 avpriv_request_sample(s->avctx, "Support for more than one tile");
491 return AVERROR_PATCHWELCOME;
492 }
493 Psot = bytestream2_get_be32u(&s->g); // Psot
494 TPsot = bytestream2_get_byteu(&s->g); // TPsot
495
496 /* Read TNSot but not used */
497 bytestream2_get_byteu(&s->g); // TNsot
498
499 if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
500 av_log(s->avctx, AV_LOG_ERROR, "Psot %d too big\n", Psot);
501 return AVERROR_INVALIDDATA;
502 }
503
504 if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) {
505 avpriv_request_sample(s->avctx, "Support for %d components", TPsot);
506 return AVERROR_PATCHWELCOME;
507 }
508
509 s->tile[Isot].tp_idx = TPsot;
510 tp = s->tile[Isot].tile_part + TPsot;
511 tp->tile_index = Isot;
512 tp->tp_end = s->g.buffer + Psot - n - 2;
513
514 if (!TPsot) {
515 Jpeg2000Tile *tile = s->tile + s->curtileno;
516
517 /* copy defaults */
518 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));
519 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));
520 }
521
522 return 0;
523 }
524
525 /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
526 * Used to know the number of tile parts and lengths.
527 * There may be multiple TLMs in the header.
528 * TODO: The function is not used for tile-parts management, nor anywhere else.
529 * It can be useful to allocate memory for tile parts, before managing the SOT
530 * markers. Parsing the TLM header is needed to increment the input header
531 * buffer.
532 * This marker is mandatory for DCI. */
533 static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
534 {
535 uint8_t Stlm, ST, SP, tile_tlm, i;
536 bytestream2_get_byte(&s->g); /* Ztlm: skipped */
537 Stlm = bytestream2_get_byte(&s->g);
538
539 // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
540 ST = (Stlm >> 4) & 0x03;
541 // TODO: Manage case of ST = 0b11 --> raise error
542 SP = (Stlm >> 6) & 0x01;
543 tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
544 for (i = 0; i < tile_tlm; i++) {
545 switch (ST) {
546 case 0:
547 break;
548 case 1:
549 bytestream2_get_byte(&s->g);
550 break;
551 case 2:
552 bytestream2_get_be16(&s->g);
553 break;
554 case 3:
555 bytestream2_get_be32(&s->g);
556 break;
557 }
558 if (SP == 0) {
559 bytestream2_get_be16(&s->g);
560 } else {
561 bytestream2_get_be32(&s->g);
562 }
563 }
564 return 0;
565 }
566
567 static int init_tile(Jpeg2000DecoderContext *s, int tileno)
568 {
569 int compno;
570 int tilex = tileno % s->numXtiles;
571 int tiley = tileno / s->numXtiles;
572 Jpeg2000Tile *tile = s->tile + tileno;
573
574 if (!tile->comp)
575 return AVERROR(ENOMEM);
576
577 for (compno = 0; compno < s->ncomponents; compno++) {
578 Jpeg2000Component *comp = tile->comp + compno;
579 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
580 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
581 int ret; // global bandno
582
583 comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
584 comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
585 comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
586 comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
587
588 comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
589 comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
590 comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
591 comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
592
593 if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
594 s->cbps[compno], s->cdx[compno],
595 s->cdy[compno], s->avctx))
596 return ret;
597 }
598 return 0;
599 }
600
601 /* Read the number of coding passes. */
602 static int getnpasses(Jpeg2000DecoderContext *s)
603 {
604 int num;
605 if (!get_bits(s, 1))
606 return 1;
607 if (!get_bits(s, 1))
608 return 2;
609 if ((num = get_bits(s, 2)) != 3)
610 return num < 0 ? num : 3 + num;
611 if ((num = get_bits(s, 5)) != 31)
612 return num < 0 ? num : 6 + num;
613 num = get_bits(s, 7);
614 return num < 0 ? num : 37 + num;
615 }
616
617 static int getlblockinc(Jpeg2000DecoderContext *s)
618 {
619 int res = 0, ret;
620 while (ret = get_bits(s, 1)) {
621 if (ret < 0)
622 return ret;
623 res++;
624 }
625 return res;
626 }
627
628 static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
629 Jpeg2000CodingStyle *codsty,
630 Jpeg2000ResLevel *rlevel, int precno,
631 int layno, uint8_t *expn, int numgbits)
632 {
633 int bandno, cblkno, ret, nb_code_blocks;
634
635 if (!(ret = get_bits(s, 1))) {
636 jpeg2000_flush(s);
637 return 0;
638 } else if (ret < 0)
639 return ret;
640
641 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
642 Jpeg2000Band *band = rlevel->band + bandno;
643 Jpeg2000Prec *prec = band->prec + precno;
644
645 if (band->coord[0][0] == band->coord[0][1] ||
646 band->coord[1][0] == band->coord[1][1])
647 continue;
648 nb_code_blocks = prec->nb_codeblocks_height *
649 prec->nb_codeblocks_width;
650 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
651 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
652 int incl, newpasses, llen;
653
654 if (cblk->npasses)
655 incl = get_bits(s, 1);
656 else
657 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
658 if (!incl)
659 continue;
660 else if (incl < 0)
661 return incl;
662
663 if (!cblk->npasses) {
664 int v = expn[bandno] + numgbits - 1 -
665 tag_tree_decode(s, prec->zerobits + cblkno, 100);
666 if (v < 0) {
667 av_log(s->avctx, AV_LOG_ERROR,
668 "nonzerobits %d invalid\n", v);
669 return AVERROR_INVALIDDATA;
670 }
671 cblk->nonzerobits = v;
672 }
673 if ((newpasses = getnpasses(s)) < 0)
674 return newpasses;
675 if ((llen = getlblockinc(s)) < 0)
676 return llen;
677 cblk->lblock += llen;
678 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
679 return ret;
680 if (ret > sizeof(cblk->data)) {
681 avpriv_request_sample(s->avctx,
682 "Block with lengthinc greater than %zu",
683 sizeof(cblk->data));
684 return AVERROR_PATCHWELCOME;
685 }
686 cblk->lengthinc = ret;
687 cblk->npasses += newpasses;
688 }
689 }
690 jpeg2000_flush(s);
691
692 if (codsty->csty & JPEG2000_CSTY_EPH) {
693 if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
694 bytestream2_skip(&s->g, 2);
695 else
696 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
697 }
698
699 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
700 Jpeg2000Band *band = rlevel->band + bandno;
701 Jpeg2000Prec *prec = band->prec + precno;
702
703 nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
704 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
705 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
706 if (bytestream2_get_bytes_left(&s->g) < cblk->lengthinc)
707 return AVERROR_INVALIDDATA;
708 /* Code-block data can be empty. In that case initialize data
709 * with 0xFFFF. */
710 if (cblk->lengthinc > 0) {
711 bytestream2_get_bufferu(&s->g, cblk->data, cblk->lengthinc);
712 } else {
713 cblk->data[0] = 0xFF;
714 cblk->data[1] = 0xFF;
715 }
716 cblk->length += cblk->lengthinc;
717 cblk->lengthinc = 0;
718 }
719 }
720 return 0;
721 }
722
723 static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
724 {
725 int ret = 0;
726 int layno, reslevelno, compno, precno, ok_reslevel;
727 int x, y;
728
729 s->bit_index = 8;
730 switch (tile->codsty[0].prog_order) {
731 case JPEG2000_PGOD_LRCP:
732 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
733 ok_reslevel = 1;
734 for (reslevelno = 0; ok_reslevel; reslevelno++) {
735 ok_reslevel = 0;
736 for (compno = 0; compno < s->ncomponents; compno++) {
737 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
738 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
739 if (reslevelno < codsty->nreslevels) {
740 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
741 reslevelno;
742 ok_reslevel = 1;
743 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
744 if ((ret = jpeg2000_decode_packet(s,
745 codsty, rlevel,
746 precno, layno,
747 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
748 qntsty->nguardbits)) < 0)
749 return ret;
750 }
751 }
752 }
753 }
754 break;
755
756 case JPEG2000_PGOD_CPRL:
757 for (compno = 0; compno < s->ncomponents; compno++) {
758 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
759 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
760
761 /* Set bit stream buffer address according to tile-part.
762 * For DCinema one tile-part per component, so can be
763 * indexed by component. */
764 s->g = tile->tile_part[compno].tpg;
765
766 /* Position loop (y axis)
767 * TODO: Automate computing of step 256.
768 * Fixed here, but to be computed before entering here. */
769 for (y = 0; y < s->height; y += 256) {
770 /* Position loop (y axis)
771 * TODO: automate computing of step 256.
772 * Fixed here, but to be computed before entering here. */
773 for (x = 0; x < s->width; x += 256) {
774 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
775 uint16_t prcx, prcy;
776 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
777 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
778
779 if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
780 (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
781 continue;
782
783 if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
784 (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
785 continue;
786
787 // check if a precinct exists
788 prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
789 prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
790 precno = prcx + rlevel->num_precincts_x * prcy;
791 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
792 if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
793 precno, layno,
794 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
795 qntsty->nguardbits)) < 0)
796 return ret;
797 }
798 }
799 }
800 }
801 }
802 break;
803
804 case JPEG2000_PGOD_RLCP:
805 avpriv_request_sample(s->avctx, "Progression order RLCP");
806 ret = AVERROR_PATCHWELCOME;
807 break;
808
809 case JPEG2000_PGOD_RPCL:
810 avpriv_request_sample(s->avctx, "Progression order RPCL");
811 ret = AVERROR_PATCHWELCOME;
812 break;
813
814 case JPEG2000_PGOD_PCRL:
815 avpriv_request_sample(s->avctx, "Progression order PCRL");
816 ret = AVERROR_PATCHWELCOME;
817 break;
818
819 default:
820 break;
821 }
822
823 /* EOC marker reached */
824 bytestream2_skip(&s->g, 2);
825
826 return ret;
827 }
828
829 /* TIER-1 routines */
830 static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
831 int bpno, int bandno, int bpass_csty_symbol,
832 int vert_causal_ctx_csty_symbol)
833 {
834 int mask = 3 << (bpno - 1), y0, x, y;
835
836 for (y0 = 0; y0 < height; y0 += 4)
837 for (x = 0; x < width; x++)
838 for (y = y0; y < height && y < y0 + 4; y++) {
839 if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
840 && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
841 int flags_mask = -1;
842 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
843 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
844 if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {
845 int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
846 if (bpass_csty_symbol)
847 t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
848 else
849 t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
850 -mask : mask;
851
852 ff_jpeg2000_set_significance(t1, x, y,
853 t1->data[y][x] < 0);
854 }
855 t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
856 }
857 }
858 }
859
860 static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
861 int bpno)
862 {
863 int phalf, nhalf;
864 int y0, x, y;
865
866 phalf = 1 << (bpno - 1);
867 nhalf = -phalf;
868
869 for (y0 = 0; y0 < height; y0 += 4)
870 for (x = 0; x < width; x++)
871 for (y = y0; y < height && y < y0 + 4; y++)
872 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
873 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
874 int r = ff_mqc_decode(&t1->mqc,
875 t1->mqc.cx_states + ctxno)
876 ? phalf : nhalf;
877 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
878 t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
879 }
880 }
881
882 static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
883 int width, int height, int bpno, int bandno,
884 int seg_symbols, int vert_causal_ctx_csty_symbol)
885 {
886 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
887
888 for (y0 = 0; y0 < height; y0 += 4) {
889 for (x = 0; x < width; x++) {
890 if (y0 + 3 < height &&
891 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
892 (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
893 (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
894 (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
895 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
896 continue;
897 runlen = ff_mqc_decode(&t1->mqc,
898 t1->mqc.cx_states + MQC_CX_UNI);
899 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
900 t1->mqc.cx_states +
901 MQC_CX_UNI);
902 dec = 1;
903 } else {
904 runlen = 0;
905 dec = 0;
906 }
907
908 for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
909 if (!dec) {
910 if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
911 int flags_mask = -1;
912 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
913 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
914 dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,
915 bandno));
916 }
917 }
918 if (dec) {
919 int xorbit;
920 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
921 &xorbit);
922 t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
923 t1->mqc.cx_states + ctxno) ^
924 xorbit)
925 ? -mask : mask;
926 ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
927 }
928 dec = 0;
929 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
930 }
931 }
932 }
933 if (seg_symbols) {
934 int val;
935 val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
936 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
937 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
938 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
939 if (val != 0xa)
940 av_log(s->avctx, AV_LOG_ERROR,
941 "Segmentation symbol value incorrect\n");
942 }
943 }
944
945 static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
946 Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
947 int width, int height, int bandpos)
948 {
949 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
950 int clnpass_cnt = 0;
951 int bpass_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_BYPASS;
952 int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC;
953
954 for (y = 0; y < height; y++)
955 memset(t1->data[y], 0, width * sizeof(**t1->data));
956
957 /* If code-block contains no compressed data: nothing to do. */
958 if (!cblk->length)
959 return 0;
960 for (y = 0; y < height + 2; y++)
961 memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags));
962
963 ff_mqc_initdec(&t1->mqc, cblk->data);
964 cblk->data[cblk->length] = 0xff;
965 cblk->data[cblk->length + 1] = 0xff;
966
967 while (passno--) {
968 switch (pass_t) {
969 case 0:
970 decode_sigpass(t1, width, height, bpno + 1, bandpos,
971 bpass_csty_symbol && (clnpass_cnt >= 4),
972 vert_causal_ctx_csty_symbol);
973 break;
974 case 1:
975 decode_refpass(t1, width, height, bpno + 1);
976 if (bpass_csty_symbol && clnpass_cnt >= 4)
977 ff_mqc_initdec(&t1->mqc, cblk->data);
978 break;
979 case 2:
980 decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
981 codsty->cblk_style & JPEG2000_CBLK_SEGSYM,
982 vert_causal_ctx_csty_symbol);
983 clnpass_cnt = clnpass_cnt + 1;
984 if (bpass_csty_symbol && clnpass_cnt >= 4)
985 ff_mqc_initdec(&t1->mqc, cblk->data);
986 break;
987 }
988
989 pass_t++;
990 if (pass_t == 3) {
991 bpno--;
992 pass_t = 0;
993 }
994 }
995 return 0;
996 }
997
998 /* TODO: Verify dequantization for lossless case
999 * comp->data can be float or int
1000 * band->stepsize can be float or int
1001 * depending on the type of DWT transformation.
1002 * see ISO/IEC 15444-1:2002 A.6.1 */
1003
1004 /* Float dequantization of a codeblock.*/
1005 static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
1006 Jpeg2000Component *comp,
1007 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1008 {
1009 int i, j, idx;
1010 float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
1011 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
1012 for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
1013 idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
1014 datap[idx] = (float)(t1->data[j][i]) * band->f_stepsize;
1015 }
1016 }
1017
1018 /* Integer dequantization of a codeblock.*/
1019 static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
1020 Jpeg2000Component *comp,
1021 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1022 {
1023 int i, j, idx;
1024 int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
1025 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
1026 for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
1027 idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
1028 datap[idx] =
1029 ((int32_t)(t1->data[j][i]) * band->i_stepsize + (1 << 15)) >> 16;
1030 }
1031 }
1032
1033 /* Inverse ICT parameters in float and integer.
1034 * int value = (float value) * (1<<16) */
1035 static const float f_ict_params[4] = {
1036 1.402f,
1037 0.34413f,
1038 0.71414f,
1039 1.772f
1040 };
1041 static const int i_ict_params[4] = {
1042 91881,
1043 22553,
1044 46802,
1045 116130
1046 };
1047
1048 static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
1049 {
1050 int i, csize = 1;
1051 int32_t *src[3], i0, i1, i2;
1052 float *srcf[3], i0f, i1f, i2f;
1053
1054 for (i = 0; i < 3; i++)
1055 if (tile->codsty[0].transform == FF_DWT97)
1056 srcf[i] = tile->comp[i].f_data;
1057 else
1058 src [i] = tile->comp[i].i_data;
1059
1060 for (i = 0; i < 2; i++)
1061 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
1062 switch (tile->codsty[0].transform) {
1063 case FF_DWT97:
1064 for (i = 0; i < csize; i++) {
1065 i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
1066 i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
1067 - (f_ict_params[2] * *srcf[2]);
1068 i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
1069 *srcf[0]++ = i0f;
1070 *srcf[1]++ = i1f;
1071 *srcf[2]++ = i2f;
1072 }
1073 break;
1074 case FF_DWT97_INT:
1075 for (i = 0; i < csize; i++) {
1076 i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
1077 i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
1078 - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
1079 i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
1080 *src[0]++ = i0;
1081 *src[1]++ = i1;
1082 *src[2]++ = i2;
1083 }
1084 break;
1085 case FF_DWT53:
1086 for (i = 0; i < csize; i++) {
1087 i1 = *src[0] - (*src[2] + *src[1] >> 2);
1088 i0 = i1 + *src[2];
1089 i2 = i1 + *src[1];
1090 *src[0]++ = i0;
1091 *src[1]++ = i1;
1092 *src[2]++ = i2;
1093 }
1094 break;
1095 }
1096 }
1097
1098 static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1099 AVFrame *picture)
1100 {
1101 int compno, reslevelno, bandno;
1102 int x, y;
1103
1104 uint8_t *line;
1105 Jpeg2000T1Context t1;
1106 /* Loop on tile components */
1107
1108 for (compno = 0; compno < s->ncomponents; compno++) {
1109 Jpeg2000Component *comp = tile->comp + compno;
1110 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1111 /* Loop on resolution levels */
1112 for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1113 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1114 /* Loop on bands */
1115 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1116 uint16_t nb_precincts, precno;
1117 Jpeg2000Band *band = rlevel->band + bandno;
1118 int cblkno = 0, bandpos;
1119 bandpos = bandno + (reslevelno > 0);
1120
1121 if (band->coord[0][0] == band->coord[0][1] ||
1122 band->coord[1][0] == band->coord[1][1])
1123 continue;
1124
1125 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1126 /* Loop on precincts */
1127 for (precno = 0; precno < nb_precincts; precno++) {
1128 Jpeg2000Prec *prec = band->prec + precno;
1129
1130 /* Loop on codeblocks */
1131 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1132 int x, y;
1133 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1134 decode_cblk(s, codsty, &t1, cblk,
1135 cblk->coord[0][1] - cblk->coord[0][0],
1136 cblk->coord[1][1] - cblk->coord[1][0],
1137 bandpos);
1138
1139 x = cblk->coord[0][0];
1140 y = cblk->coord[1][0];
1141
1142 if (codsty->transform == FF_DWT97)
1143 dequantization_float(x, y, cblk, comp, &t1, band);
1144 else
1145 dequantization_int(x, y, cblk, comp, &t1, band);
1146 } /* end cblk */
1147 } /*end prec */
1148 } /* end band */
1149 } /* end reslevel */
1150
1151 /* inverse DWT */
1152 ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data);
1153 } /*end comp */
1154
1155 /* inverse MCT transformation */
1156 if (tile->codsty[0].mct)
1157 mct_decode(s, tile);
1158
1159 if (s->precision <= 8) {
1160 for (compno = 0; compno < s->ncomponents; compno++) {
1161 Jpeg2000Component *comp = tile->comp + compno;
1162 float *datap = comp->f_data;
1163 int32_t *i_datap = comp->i_data;
1164 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1165 line = picture->data[0] + y * picture->linesize[0];
1166 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1167 uint8_t *dst;
1168
1169 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1170 dst = line + x * s->ncomponents + compno;
1171
1172 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) {
1173 int val;
1174 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1175 if (tile->codsty->transform == FF_DWT97)
1176 val = lrintf(*datap) + (1 << (s->cbps[compno] - 1));
1177 else
1178 val = *i_datap + (1 << (s->cbps[compno] - 1));
1179 val = av_clip(val, 0, (1 << s->cbps[compno]) - 1);
1180 *dst = val << (8 - s->cbps[compno]);
1181 datap++;
1182 i_datap++;
1183 dst += s->ncomponents;
1184 }
1185 line += picture->linesize[0];
1186 }
1187 }
1188 } else {
1189 for (compno = 0; compno < s->ncomponents; compno++) {
1190 Jpeg2000Component *comp = tile->comp + compno;
1191 float *datap = comp->f_data;
1192 int32_t *i_datap = comp->i_data;
1193 uint16_t *linel;
1194
1195 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1196 linel = (uint16_t *)picture->data[0] + y * (picture->linesize[0] >> 1);
1197 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1198 uint16_t *dst;
1199 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1200 dst = linel + (x * s->ncomponents + compno);
1201 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s-> cdx[compno]) {
1202 int val;
1203 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1204 if (tile->codsty->transform == FF_DWT97)
1205 val = lrintf(*datap) + (1 << (s->cbps[compno] - 1));
1206 else
1207 val = *i_datap + (1 << (s->cbps[compno] - 1));
1208 val = av_clip(val, 0, (1 << s->cbps[compno]) - 1);
1209 /* align 12 bit values in little-endian mode */
1210 *dst = val << (16 - s->cbps[compno]);
1211 datap++;
1212 i_datap++;
1213 dst += s->ncomponents;
1214 }
1215 linel += picture->linesize[0] >> 1;
1216 }
1217 }
1218 }
1219 return 0;
1220 }
1221
1222 static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1223 {
1224 int tileno, compno;
1225 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1226 for (compno = 0; compno < s->ncomponents; compno++) {
1227 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1228 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1229
1230 ff_jpeg2000_cleanup(comp, codsty);
1231 }
1232 av_freep(&s->tile[tileno].comp);
1233 }
1234 av_freep(&s->tile);
1235 }
1236
1237 static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1238 {
1239 Jpeg2000CodingStyle *codsty = s->codsty;
1240 Jpeg2000QuantStyle *qntsty = s->qntsty;
1241 uint8_t *properties = s->properties;
1242
1243 for (;;) {
1244 int len, ret = 0;
1245 uint16_t marker;
1246 int oldpos;
1247
1248 if (bytestream2_get_bytes_left(&s->g) < 2) {
1249 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1250 break;
1251 }
1252
1253 marker = bytestream2_get_be16u(&s->g);
1254 oldpos = bytestream2_tell(&s->g);
1255
1256 if (marker == JPEG2000_SOD) {
1257 Jpeg2000Tile *tile;
1258 Jpeg2000TilePart *tp;
1259
1260 if (s->curtileno < 0) {
1261 av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n");
1262 return AVERROR_INVALIDDATA;
1263 }
1264
1265 tile = s->tile + s->curtileno;
1266 tp = tile->tile_part + tile->tp_idx;
1267 bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer);
1268 bytestream2_skip(&s->g, tp->tp_end - s->g.buffer);
1269
1270 continue;
1271 }
1272 if (marker == JPEG2000_EOC)
1273 break;
1274
1275 len = bytestream2_get_be16u(&s->g);
1276 if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2)
1277 return AVERROR_INVALIDDATA;
1278
1279 switch (marker) {
1280 case JPEG2000_SIZ:
1281 ret = get_siz(s);
1282 break;
1283 case JPEG2000_COC:
1284 ret = get_coc(s, codsty, properties);
1285 break;
1286 case JPEG2000_COD:
1287 ret = get_cod(s, codsty, properties);
1288 break;
1289 case JPEG2000_QCC:
1290 ret = get_qcc(s, len, qntsty, properties);
1291 break;
1292 case JPEG2000_QCD:
1293 ret = get_qcd(s, len, qntsty, properties);
1294 break;
1295 case JPEG2000_SOT:
1296 if (!(ret = get_sot(s, len))) {
1297 codsty = s->tile[s->curtileno].codsty;
1298 qntsty = s->tile[s->curtileno].qntsty;
1299 properties = s->tile[s->curtileno].properties;
1300 }
1301 break;
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:
1311 av_log(s->avctx, AV_LOG_ERROR,
1312 "unsupported marker 0x%.4X 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) {
1318 av_log(s->avctx, AV_LOG_ERROR,
1319 "error during processing marker segment %.4x\n", marker);
1320 return ret ? ret : -1;
1321 }
1322 }
1323 return 0;
1324 }
1325
1326 /* Read bit stream packets --> T2 operation. */
1327 static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1328 {
1329 int ret = 0;
1330 int tileno;
1331
1332 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1333 Jpeg2000Tile *tile = s->tile + tileno;
1334
1335 if (ret = init_tile(s, tileno))
1336 return ret;
1337
1338 s->g = tile->tile_part[0].tpg;
1339 if (ret = jpeg2000_decode_packets(s, tile))
1340 return ret;
1341 }
1342
1343 return 0;
1344 }
1345
1346 static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1347 {
1348 uint32_t atom_size, atom;
1349 int found_codestream = 0, search_range = 10;
1350
1351 while(!found_codestream && search_range
1352 &&
1353 bytestream2_get_bytes_left(&s->g) >= 8) {
1354 atom_size = bytestream2_get_be32u(&s->g);
1355 atom = bytestream2_get_be32u(&s->g);
1356 if (atom == JP2_CODESTREAM) {
1357 found_codestream = 1;
1358 } else {
1359 if (bytestream2_get_bytes_left(&s->g) < atom_size - 8)
1360 return 0;
1361 bytestream2_skipu(&s->g, atom_size - 8);
1362 search_range--;
1363 }
1364 }
1365
1366 if (found_codestream)
1367 return 1;
1368 return 0;
1369 }
1370
1371 static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1372 int *got_frame, AVPacket *avpkt)
1373 {
1374 Jpeg2000DecoderContext *s = avctx->priv_data;
1375 ThreadFrame frame = { .f = data };
1376 AVFrame *picture = data;
1377 int tileno, ret;
1378
1379 s->avctx = avctx;
1380 bytestream2_init(&s->g, avpkt->data, avpkt->size);
1381 s->curtileno = 0; // TODO: only one tile in DCI JP2K. to implement for more tiles
1382
1383 if (bytestream2_get_bytes_left(&s->g) < 2) {
1384 ret = AVERROR_INVALIDDATA;
1385 goto end;
1386 }
1387
1388 // check if the image is in jp2 format
1389 if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1390 (bytestream2_get_be32u(&s->g) == 12) &&
1391 (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1392 (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
1393 if (!jp2_find_codestream(s)) {
1394 av_log(avctx, AV_LOG_ERROR,
1395 "Could not find Jpeg2000 codestream atom.\n");
1396 ret = AVERROR_INVALIDDATA;
1397 goto end;
1398 }
1399 } else {
1400 bytestream2_seek(&s->g, 0, SEEK_SET);
1401 }
1402
1403 if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
1404 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1405 ret = AVERROR_INVALIDDATA;
1406 goto end;
1407 }
1408 if (ret = jpeg2000_read_main_headers(s))
1409 goto end;
1410
1411 /* get picture buffer */
1412 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
1413 av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed.\n");
1414 goto end;
1415 }
1416 picture->pict_type = AV_PICTURE_TYPE_I;
1417 picture->key_frame = 1;
1418
1419 if (ret = jpeg2000_read_bitstream_packets(s))
1420 goto end;
1421 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1422 if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
1423 goto end;
1424
1425 jpeg2000_dec_cleanup(s);
1426
1427 *got_frame = 1;
1428
1429 return bytestream2_tell(&s->g);
1430
1431 end:
1432 jpeg2000_dec_cleanup(s);
1433 return ret;
1434 }
1435
1436 static void jpeg2000_init_static_data(AVCodec *codec)
1437 {
1438 ff_jpeg2000_init_tier1_luts();
1439 }
1440
1441 #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1442 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1443
1444 static const AVOption options[] = {
1445 { "lowres", "Lower the decoding resolution by a power of two",
1446 OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1447 { NULL },
1448 };
1449
1450 static const AVProfile profiles[] = {
1451 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
1452 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
1453 { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
1454 { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
1455 { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
1456 { FF_PROFILE_UNKNOWN },
1457 };
1458
1459 static const AVClass class = {
1460 .class_name = "jpeg2000",
1461 .item_name = av_default_item_name,
1462 .option = options,
1463 .version = LIBAVUTIL_VERSION_INT,
1464 };
1465
1466 AVCodec ff_jpeg2000_decoder = {
1467 .name = "jpeg2000",
1468 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1469 .type = AVMEDIA_TYPE_VIDEO,
1470 .id = AV_CODEC_ID_JPEG2000,
1471 .capabilities = CODEC_CAP_FRAME_THREADS,
1472 .priv_data_size = sizeof(Jpeg2000DecoderContext),
1473 .init_static_data = jpeg2000_init_static_data,
1474 .decode = jpeg2000_decode_frame,
1475 .priv_class = &class,
1476 .profiles = NULL_IF_CONFIG_SMALL(profiles)
1477 };