jpeg2000: Use bytestream2
[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
1a3598aa 47 GetByteContext tpg; // bit stream in tile-part
c81a7063
NB
48} Jpeg2000TilePart;
49
50/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
51 * one per component, so tile_part elements have a size of 3 */
52typedef struct Jpeg2000Tile {
53 Jpeg2000Component *comp;
54 uint8_t properties[4];
55 Jpeg2000CodingStyle codsty[4];
56 Jpeg2000QuantStyle qntsty[4];
57 Jpeg2000TilePart tile_part[3];
58} Jpeg2000Tile;
59
60typedef struct Jpeg2000DecoderContext {
61 AVClass *class;
62 AVCodecContext *avctx;
1a3598aa 63 GetByteContext g;
c81a7063
NB
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
c81a7063
NB
81 int bit_index;
82
83 int16_t curtileno;
84 Jpeg2000Tile *tile;
85
86 /*options parameters*/
87 int16_t lowres;
88 int16_t reduction_factor;
89} Jpeg2000DecoderContext;
90
91/* get_bits functions for JPEG2000 packet bitstream
92 * It is a get_bit function with a bit-stuffing routine. If the value of the
93 * byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB.
94 * cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */
95static int get_bits(Jpeg2000DecoderContext *s, int n)
96{
97 int res = 0;
c81a7063
NB
98 while (--n >= 0) {
99 res <<= 1;
100 if (s->bit_index == 0) {
1a3598aa 101 s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);
c81a7063
NB
102 }
103 s->bit_index--;
1a3598aa 104 res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;
c81a7063
NB
105 }
106 return res;
107}
108
109static void jpeg2000_flush(Jpeg2000DecoderContext *s)
110{
1a3598aa
MN
111 if (bytestream2_get_byte(&s->g) == 0xff)
112 bytestream2_skip(&s->g, 1);
c81a7063 113 s->bit_index = 8;
c81a7063
NB
114}
115
116/* decode the value stored in node */
117static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node,
118 int threshold)
119{
120 Jpeg2000TgtNode *stack[30];
121 int sp = -1, curval = 0;
122
123 while (node && !node->vis) {
124 stack[++sp] = node;
125 node = node->parent;
126 }
127
128 if (node)
129 curval = node->val;
130 else
131 curval = stack[sp]->val;
132
133 while (curval < threshold && sp >= 0) {
134 if (curval < stack[sp]->val)
135 curval = stack[sp]->val;
136 while (curval < threshold) {
137 int ret;
138 if ((ret = get_bits(s, 1)) > 0) {
139 stack[sp]->vis++;
140 break;
141 } else if (!ret)
142 curval++;
143 else
144 return ret;
145 }
146 stack[sp]->val = curval;
147 sp--;
148 }
149 return curval;
150}
151
152/* marker segments */
153/* get sizes and offsets of image, tiles; number of components */
154static int get_siz(Jpeg2000DecoderContext *s)
155{
156 int i;
157
1a3598aa 158 if (bytestream2_get_bytes_left(&s->g) < 36)
5efadcb8 159 return AVERROR_INVALIDDATA;
c81a7063 160
1a3598aa
MN
161 s->avctx->profile = bytestream2_get_be16u(&s->g); // Rsiz
162 s->width = bytestream2_get_be32u(&s->g); // Width
163 s->height = bytestream2_get_be32u(&s->g); // Height
164 s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz
165 s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz
166 s->tile_width = bytestream2_get_be32u(&s->g); // XTSiz
167 s->tile_height = bytestream2_get_be32u(&s->g); // YTSiz
168 s->tile_offset_x = bytestream2_get_be32u(&s->g); // XT0Siz
169 s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz
170 s->ncomponents = bytestream2_get_be16u(&s->g); // CSiz
171
172 if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents)
5efadcb8 173 return AVERROR_INVALIDDATA;
c81a7063
NB
174
175 for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
1a3598aa 176 uint8_t x = bytestream2_get_byteu(&s->g);
c81a7063
NB
177 s->cbps[i] = (x & 0x7f) + 1;
178 s->precision = FFMAX(s->cbps[i], s->precision);
179 s->sgnd[i] = (x & 0x80) == 1;
1a3598aa
MN
180 s->cdx[i] = bytestream2_get_byteu(&s->g);
181 s->cdy[i] = bytestream2_get_byteu(&s->g);
c81a7063
NB
182 }
183
184 s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
185 s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
186
187 s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(*s->tile));
188 if (!s->tile)
189 return AVERROR(ENOMEM);
190
191 for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
192 Jpeg2000Tile *tile = s->tile + i;
193
194 tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
195 if (!tile->comp)
196 return AVERROR(ENOMEM);
197 }
198
199 /* compute image size with reduction factor */
200 s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x,
201 s->reduction_factor);
202 s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
203 s->reduction_factor);
204
205 switch (s->avctx->profile) {
206 case FF_PROFILE_JPEG2000_DCINEMA_2K:
207 case FF_PROFILE_JPEG2000_DCINEMA_4K:
208 /* XYZ color-space for digital cinema profiles */
10f1a4d9 209 s->avctx->pix_fmt = AV_PIX_FMT_XYZ12;
c81a7063
NB
210 break;
211 default:
212 /* For other profiles selects color-space according number of
213 * components and bit depth precision. */
214 switch (s->ncomponents) {
215 case 1:
216 if (s->precision > 8)
217 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
218 else
219 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
220 break;
221 case 3:
222 if (s->precision > 8)
223 s->avctx->pix_fmt = AV_PIX_FMT_RGB48;
224 else
225 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
226 break;
227 case 4:
228 s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
229 break;
230 default:
231 /* pixel format can not be identified */
232 s->avctx->pix_fmt = AV_PIX_FMT_NONE;
233 break;
234 }
235 break;
236 }
237 return 0;
238}
239
240/* get common part for COD and COC segments */
241static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
242{
243 uint8_t byte;
244
1a3598aa
MN
245 if (bytestream2_get_bytes_left(&s->g) < 5)
246 return AVERROR_INVALIDDATA;
247
5650e331
LB
248 /* nreslevels = number of resolution levels
249 = number of decomposition level +1 */
1a3598aa 250 c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
5650e331
LB
251
252 if (c->nreslevels > JPEG2000_MAX_RESLEVELS)
253 return AVERROR_INVALIDDATA;
c81a7063
NB
254
255 /* compute number of resolution levels to decode */
256 if (c->nreslevels < s->reduction_factor)
257 c->nreslevels2decode = 1;
258 else
259 c->nreslevels2decode = c->nreslevels - s->reduction_factor;
260
1a3598aa
MN
261 c->log2_cblk_width = bytestream2_get_byteu(&s->g) + 2; // cblk width
262 c->log2_cblk_height = bytestream2_get_byteu(&s->g) + 2; // cblk height
c81a7063 263
fbcc03db
MN
264 if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
265 c->log2_cblk_width + c->log2_cblk_height > 12) {
266 av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
267 return AVERROR_INVALIDDATA;
268 }
269
1a3598aa 270 c->cblk_style = bytestream2_get_byteu(&s->g);
c81a7063 271 if (c->cblk_style != 0) { // cblk style
5efadcb8
LB
272 avpriv_request_sample(s->avctx, "Support for extra cblk styles");
273 return AVERROR_PATCHWELCOME;
c81a7063 274 }
1a3598aa 275 c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
c81a7063
NB
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++) {
1a3598aa 283 byte = bytestream2_get_byte(&s->g);
c81a7063
NB
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
1a3598aa 298 if (bytestream2_get_bytes_left(&s->g) < 5)
5efadcb8 299 return AVERROR_INVALIDDATA;
c81a7063
NB
300
301 tmp.log2_prec_width =
302 tmp.log2_prec_height = 15;
303
1a3598aa 304 tmp.csty = bytestream2_get_byteu(&s->g);
c81a7063
NB
305
306 // get progression order
1a3598aa 307 tmp.prog_order = bytestream2_get_byteu(&s->g);
c81a7063 308
1a3598aa
MN
309 tmp.nlayers = bytestream2_get_be16u(&s->g);
310 tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
c81a7063
NB
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
1a3598aa 326 if (bytestream2_get_bytes_left(&s->g) < 2)
5efadcb8 327 return AVERROR_INVALIDDATA;
c81a7063 328
1a3598aa 329 compno = bytestream2_get_byteu(&s->g);
c81a7063
NB
330
331 c += compno;
1a3598aa 332 c->csty = bytestream2_get_byteu(&s->g);
c81a7063
NB
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
1a3598aa 344 if (bytestream2_get_bytes_left(&s->g) < 1)
5efadcb8 345 return AVERROR_INVALIDDATA;
c81a7063 346
1a3598aa 347 x = bytestream2_get_byteu(&s->g); // Sqcd
c81a7063
NB
348
349 q->nguardbits = x >> 5;
350 q->quantsty = x & 0x1f;
351
352 if (q->quantsty == JPEG2000_QSTY_NONE) {
353 n -= 3;
1a3598aa
MN
354 if (bytestream2_get_bytes_left(&s->g) < n ||
355 n > JPEG2000_MAX_DECLEVELS)
5efadcb8 356 return AVERROR_INVALIDDATA;
c81a7063 357 for (i = 0; i < n; i++)
1a3598aa 358 q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
c81a7063 359 } else if (q->quantsty == JPEG2000_QSTY_SI) {
1a3598aa 360 if (bytestream2_get_bytes_left(&s->g) < 2)
5efadcb8 361 return AVERROR_INVALIDDATA;
1a3598aa 362 x = bytestream2_get_be16u(&s->g);
c81a7063
NB
363 q->expn[0] = x >> 11;
364 q->mant[0] = x & 0x7ff;
be327100 365 for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
c81a7063
NB
366 int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
367 q->expn[i] = curexpn;
368 q->mant[i] = q->mant[0];
369 }
370 } else {
371 n = (n - 3) >> 1;
1a3598aa
MN
372 if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
373 n > JPEG2000_MAX_DECLEVELS)
5efadcb8 374 return AVERROR_INVALIDDATA;
c81a7063 375 for (i = 0; i < n; i++) {
1a3598aa 376 x = bytestream2_get_be16u(&s->g);
c81a7063
NB
377 q->expn[i] = x >> 11;
378 q->mant[i] = x & 0x7ff;
379 }
380 }
381 return 0;
382}
383
384/* Get quantization parameters for a particular tile or a whole image. */
385static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
386 uint8_t *properties)
387{
388 Jpeg2000QuantStyle tmp;
5efadcb8 389 int compno, ret;
c81a7063 390
5efadcb8
LB
391 if ((ret = get_qcx(s, n, &tmp)) < 0)
392 return ret;
c81a7063
NB
393 for (compno = 0; compno < s->ncomponents; compno++)
394 if (!(properties[compno] & HAD_QCC))
395 memcpy(q + compno, &tmp, sizeof(tmp));
396 return 0;
397}
398
399/* Get quantization parameters for a component in the whole image
400 * on in a particular tile. */
401static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
402 uint8_t *properties)
403{
404 int compno;
405
1a3598aa 406 if (bytestream2_get_bytes_left(&s->g) < 1)
5efadcb8 407 return AVERROR_INVALIDDATA;
c81a7063 408
1a3598aa 409 compno = bytestream2_get_byteu(&s->g);
c81a7063
NB
410 properties[compno] |= HAD_QCC;
411 return get_qcx(s, n - 1, q + compno);
412}
413
414/* Get start of tile segment. */
5efadcb8 415static int get_sot(Jpeg2000DecoderContext *s, int n)
c81a7063
NB
416{
417 Jpeg2000TilePart *tp;
418 uint16_t Isot;
419 uint32_t Psot;
420 uint8_t TPsot;
421
1a3598aa 422 if (bytestream2_get_bytes_left(&s->g) < 8)
5efadcb8 423 return AVERROR_INVALIDDATA;
c81a7063 424
1a3598aa 425 Isot = bytestream2_get_be16u(&s->g); // Isot
c81a7063 426 if (Isot) {
5efadcb8
LB
427 avpriv_request_sample(s->avctx, "Support for more than one tile");
428 return AVERROR_PATCHWELCOME;
c81a7063 429 }
1a3598aa
MN
430 Psot = bytestream2_get_be32u(&s->g); // Psot
431 TPsot = bytestream2_get_byteu(&s->g); // TPsot
c81a7063
NB
432
433 /* Read TNSot but not used */
1a3598aa 434 bytestream2_get_byteu(&s->g); // TNsot
c81a7063
NB
435
436 tp = s->tile[s->curtileno].tile_part + TPsot;
437 tp->tile_index = Isot;
438 tp->tp_len = Psot;
439 tp->tp_idx = TPsot;
440
441 /* Start of bit stream. Pointer to SOD marker
442 * Check SOD marker is present. */
1a3598aa
MN
443 if (JPEG2000_SOD == bytestream2_get_be16(&s->g)) {
444 bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_len - n - 4);
445 bytestream2_skip(&s->g, tp->tp_len - n - 4);
446 } else {
c81a7063 447 av_log(s->avctx, AV_LOG_ERROR, "SOD marker not found \n");
5efadcb8 448 return AVERROR_INVALIDDATA;
c81a7063
NB
449 }
450
451 /* End address of bit stream =
452 * start address + (Psot - size of SOT HEADER(n)
453 * - size of SOT MARKER(2) - size of SOD marker(2) */
c81a7063
NB
454
455 return 0;
456}
457
458/* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
459 * Used to know the number of tile parts and lengths.
460 * There may be multiple TLMs in the header.
461 * TODO: The function is not used for tile-parts management, nor anywhere else.
462 * It can be useful to allocate memory for tile parts, before managing the SOT
463 * markers. Parsing the TLM header is needed to increment the input header
464 * buffer.
465 * This marker is mandatory for DCI. */
466static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
467{
468 uint8_t Stlm, ST, SP, tile_tlm, i;
1a3598aa
MN
469 bytestream2_get_byte(&s->g); /* Ztlm: skipped */
470 Stlm = bytestream2_get_byte(&s->g);
c81a7063
NB
471
472 // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
473 ST = (Stlm >> 4) & 0x03;
474 // TODO: Manage case of ST = 0b11 --> raise error
475 SP = (Stlm >> 6) & 0x01;
476 tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
477 for (i = 0; i < tile_tlm; i++) {
478 switch (ST) {
479 case 0:
480 break;
481 case 1:
1a3598aa 482 bytestream2_get_byte(&s->g);
c81a7063
NB
483 break;
484 case 2:
1a3598aa 485 bytestream2_get_be16(&s->g);
c81a7063
NB
486 break;
487 case 3:
1a3598aa 488 bytestream2_get_be32(&s->g);
c81a7063
NB
489 break;
490 }
491 if (SP == 0) {
1a3598aa 492 bytestream2_get_be16(&s->g);
c81a7063 493 } else {
1a3598aa 494 bytestream2_get_be32(&s->g);
c81a7063
NB
495 }
496 }
497 return 0;
498}
499
500static int init_tile(Jpeg2000DecoderContext *s, int tileno)
501{
502 int compno;
503 int tilex = tileno % s->numXtiles;
504 int tiley = tileno / s->numXtiles;
505 Jpeg2000Tile *tile = s->tile + tileno;
506 Jpeg2000CodingStyle *codsty;
507 Jpeg2000QuantStyle *qntsty;
508
509 if (!tile->comp)
510 return AVERROR(ENOMEM);
511
512 /* copy codsty, qnsty to tile. TODO: Is it the best way?
513 * codsty, qnsty is an array of 4 structs Jpeg2000CodingStyle
514 * and Jpeg2000QuantStyle */
515 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(*codsty));
516 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(*qntsty));
517
518 for (compno = 0; compno < s->ncomponents; compno++) {
519 Jpeg2000Component *comp = tile->comp + compno;
520 int ret; // global bandno
521 codsty = tile->codsty + compno;
522 qntsty = tile->qntsty + compno;
523
524 comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
525 comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
526 comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
527 comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
528
529 // FIXME: add a dcinema profile check ?
530 // value is guaranteed by profile (orig=0, 1 tile)
531 comp->coord[0][0] = 0;
532 comp->coord[0][1] = s->avctx->width;
533 comp->coord[1][0] = 0;
534 comp->coord[1][1] = s->avctx->height;
535
536 if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
537 s->cbps[compno], s->cdx[compno],
538 s->cdy[compno], s->avctx))
539 return ret;
540 }
541 return 0;
542}
543
544/* Read the number of coding passes. */
545static int getnpasses(Jpeg2000DecoderContext *s)
546{
547 int num;
548 if (!get_bits(s, 1))
549 return 1;
550 if (!get_bits(s, 1))
551 return 2;
552 if ((num = get_bits(s, 2)) != 3)
553 return num < 0 ? num : 3 + num;
554 if ((num = get_bits(s, 5)) != 31)
555 return num < 0 ? num : 6 + num;
556 num = get_bits(s, 7);
557 return num < 0 ? num : 37 + num;
558}
559
560static int getlblockinc(Jpeg2000DecoderContext *s)
561{
562 int res = 0, ret;
563 while (ret = get_bits(s, 1)) {
564 if (ret < 0)
565 return ret;
566 res++;
567 }
568 return res;
569}
570
571static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
572 Jpeg2000CodingStyle *codsty,
573 Jpeg2000ResLevel *rlevel, int precno,
574 int layno, uint8_t *expn, int numgbits)
575{
576 int bandno, cblkno, ret, nb_code_blocks;
577
578 if (!(ret = get_bits(s, 1))) {
579 jpeg2000_flush(s);
580 return 0;
581 } else if (ret < 0)
582 return ret;
583
584 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
585 Jpeg2000Band *band = rlevel->band + bandno;
586 Jpeg2000Prec *prec = band->prec + precno;
587
588 if (band->coord[0][0] == band->coord[0][1] ||
589 band->coord[1][0] == band->coord[1][1])
590 continue;
591 prec->yi0 = 0;
592 prec->xi0 = 0;
593 nb_code_blocks = prec->nb_codeblocks_height *
594 prec->nb_codeblocks_width;
595 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
596 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
597 int incl, newpasses, llen;
598
599 if (cblk->npasses)
600 incl = get_bits(s, 1);
601 else
602 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
603 if (!incl)
604 continue;
605 else if (incl < 0)
606 return incl;
607
608 if (!cblk->npasses)
609 cblk->nonzerobits = expn[bandno] + numgbits - 1 -
610 tag_tree_decode(s, prec->zerobits + cblkno,
611 100);
612 if ((newpasses = getnpasses(s)) < 0)
613 return newpasses;
614 if ((llen = getlblockinc(s)) < 0)
615 return llen;
616 cblk->lblock += llen;
617 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
618 return ret;
619 cblk->lengthinc = ret;
620 cblk->npasses += newpasses;
621 }
622 }
623 jpeg2000_flush(s);
624
625 if (codsty->csty & JPEG2000_CSTY_EPH) {
1a3598aa
MN
626 if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
627 bytestream2_skip(&s->g, 2);
c81a7063
NB
628 else
629 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
630 }
631
632 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
633 Jpeg2000Band *band = rlevel->band + bandno;
634 Jpeg2000Prec *prec = band->prec + precno;
635
636 nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
637 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
638 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1a3598aa 639 if (bytestream2_get_bytes_left(&s->g) < cblk->lengthinc)
5efadcb8 640 return AVERROR_INVALIDDATA;
28816f9d
NB
641 /* Code-block data can be empty. In that case initialize data
642 * with 0xFFFF. */
643 if (cblk->lengthinc > 0) {
1a3598aa 644 bytestream2_get_bufferu(&s->g, cblk->data, cblk->lengthinc);
28816f9d
NB
645 } else {
646 cblk->data[0] = 0xFF;
647 cblk->data[1] = 0xFF;
648 }
c81a7063
NB
649 cblk->length += cblk->lengthinc;
650 cblk->lengthinc = 0;
651 }
652 }
653 return 0;
654}
655
656static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
657{
5efadcb8 658 int layno, reslevelno, compno, precno, ok_reslevel, ret;
c81a7063
NB
659 uint8_t prog_order = tile->codsty[0].prog_order;
660 uint16_t x;
661 uint16_t y;
662
663 s->bit_index = 8;
664 switch (prog_order) {
665 case JPEG2000_PGOD_LRCP:
666 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
667 ok_reslevel = 1;
668 for (reslevelno = 0; ok_reslevel; reslevelno++) {
669 ok_reslevel = 0;
670 for (compno = 0; compno < s->ncomponents; compno++) {
671 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
672 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
673 if (reslevelno < codsty->nreslevels) {
674 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
675 reslevelno;
676 ok_reslevel = 1;
677 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
5efadcb8
LB
678 if ((ret = jpeg2000_decode_packet(s,
679 codsty, rlevel,
680 precno, layno,
681 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
682 qntsty->nguardbits)) < 0)
683 return ret;
c81a7063
NB
684 }
685 }
686 }
687 }
688 break;
689
690 case JPEG2000_PGOD_CPRL:
691 for (compno = 0; compno < s->ncomponents; compno++) {
692 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
693 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
694
695 /* Set bit stream buffer address according to tile-part.
696 * For DCinema one tile-part per component, so can be
697 * indexed by component. */
1a3598aa 698 s->g = tile->tile_part[compno].tpg;
c81a7063
NB
699
700 /* Position loop (y axis)
701 * TODO: Automate computing of step 256.
702 * Fixed here, but to be computed before entering here. */
703 for (y = 0; y < s->height; y += 256) {
704 /* Position loop (y axis)
705 * TODO: automate computing of step 256.
706 * Fixed here, but to be computed before entering here. */
707 for (x = 0; x < s->width; x += 256) {
708 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
709 uint16_t prcx, prcy;
710 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
711 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
712
713 if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
714 (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
715 continue;
716
717 if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
718 (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
719 continue;
720
721 // check if a precinct exists
722 prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
723 prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
724 precno = prcx + rlevel->num_precincts_x * prcy;
725 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
5efadcb8
LB
726 if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
727 precno, layno,
728 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
729 qntsty->nguardbits)) < 0)
730 return ret;
c81a7063
NB
731 }
732 }
733 }
734 }
735 }
736 break;
737
738 default:
739 break;
740 }
741
742 /* EOC marker reached */
1a3598aa 743 bytestream2_skip(&s->g, 2);
c81a7063
NB
744
745 return 0;
746}
747
748/* TIER-1 routines */
749static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
750 int bpno, int bandno)
751{
752 int mask = 3 << (bpno - 1), y0, x, y;
753
754 for (y0 = 0; y0 < height; y0 += 4)
755 for (x = 0; x < width; x++)
756 for (y = y0; y < height && y < y0 + 4; y++)
757 if ((t1->flags[y + 1][x + 1] & JPEG2000_T1_SIG_NB)
758 && !(t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
759 if (ff_mqc_decode(&t1->mqc,
760 t1->mqc.cx_states +
761 ff_jpeg2000_getsigctxno(t1->flags[y + 1][x + 1],
762 bandno))) {
763 int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
764 &xorbit);
765
766 t1->data[y][x] =
767 (ff_mqc_decode(&t1->mqc,
768 t1->mqc.cx_states + ctxno) ^ xorbit)
769 ? -mask : mask;
770
771 ff_jpeg2000_set_significance(t1, x, y,
772 t1->data[y][x] < 0);
773 }
774 t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
775 }
776}
777
778static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
779 int bpno)
780{
781 int phalf, nhalf;
782 int y0, x, y;
783
784 phalf = 1 << (bpno - 1);
785 nhalf = -phalf;
786
787 for (y0 = 0; y0 < height; y0 += 4)
788 for (x = 0; x < width; x++)
789 for (y = y0; y < height && y < y0 + 4; y++)
790 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
791 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
792 int r = ff_mqc_decode(&t1->mqc,
793 t1->mqc.cx_states + ctxno)
794 ? phalf : nhalf;
795 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
796 t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
797 }
798}
799
800static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
801 int width, int height, int bpno, int bandno,
802 int seg_symbols)
803{
804 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
805
806 for (y0 = 0; y0 < height; y0 += 4)
807 for (x = 0; x < width; x++) {
808 if (y0 + 3 < height &&
809 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
810 (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
811 (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
812 (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
813 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
814 continue;
815 runlen = ff_mqc_decode(&t1->mqc,
816 t1->mqc.cx_states + MQC_CX_UNI);
817 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
818 t1->mqc.cx_states +
819 MQC_CX_UNI);
820 dec = 1;
821 } else {
822 runlen = 0;
823 dec = 0;
824 }
825
826 for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
827 if (!dec) {
828 if (!(t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)))
829 dec = ff_mqc_decode(&t1->mqc,
830 t1->mqc.cx_states +
831 ff_jpeg2000_getsigctxno(t1->flags[y + 1][x + 1],
832 bandno));
833 }
834 if (dec) {
835 int xorbit;
836 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
837 &xorbit);
838 t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
839 t1->mqc.cx_states + ctxno) ^
840 xorbit)
841 ? -mask : mask;
842 ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
843 }
844 dec = 0;
845 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
846 }
847 }
848 if (seg_symbols) {
849 int val;
850 val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
851 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
852 val = (val << 1) + 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 if (val != 0xa)
855 av_log(s->avctx, AV_LOG_ERROR,
856 "Segmentation symbol value incorrect\n");
857 }
858}
859
860static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
861 Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
862 int width, int height, int bandpos)
863{
864 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
865
c81a7063
NB
866 for (y = 0; y < height; y++)
867 memset(t1->data[y], 0, width * sizeof(width));
28816f9d
NB
868 /* If code-block contains no compressed data: nothing to do. */
869 if (!cblk->length)
870 return 0;
871 for (y = 0; y < height + 2; y++)
872 memset(t1->flags[y], 0, (width + 2) * sizeof(width));
c81a7063
NB
873
874 ff_mqc_initdec(&t1->mqc, cblk->data);
875 cblk->data[cblk->length] = 0xff;
876 cblk->data[cblk->length + 1] = 0xff;
877
878 while (passno--) {
879 switch (pass_t) {
880 case 0:
881 decode_sigpass(t1, width, height, bpno + 1, bandpos);
882 break;
883 case 1:
884 decode_refpass(t1, width, height, bpno + 1);
885 break;
886 case 2:
887 decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
888 codsty->cblk_style & JPEG2000_CBLK_SEGSYM);
889 break;
890 }
891
892 pass_t++;
893 if (pass_t == 3) {
894 bpno--;
895 pass_t = 0;
896 }
897 }
898 return 0;
899}
900
901/* TODO: Verify dequantization for lossless case
902 * comp->data can be float or int
903 * band->stepsize can be float or int
904 * depending on the type of DWT transformation.
905 * see ISO/IEC 15444-1:2002 A.6.1 */
906
907/* Float dequantization of a codeblock.*/
908static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
909 Jpeg2000Component *comp,
910 Jpeg2000T1Context *t1, Jpeg2000Band *band)
911{
912 int i, j, idx;
913 float *datap = &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
914 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
915 for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
916 idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
917 datap[idx] = (float)(t1->data[j][i]) * ((float)band->stepsize);
918 }
919 return;
920}
921
922/* Integer dequantization of a codeblock.*/
923static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
924 Jpeg2000Component *comp,
925 Jpeg2000T1Context *t1, Jpeg2000Band *band)
926{
927 int i, j, idx;
928 int32_t *datap =
929 (int32_t *) &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
930 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
931 for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
932 idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
933 datap[idx] =
934 ((int32_t)(t1->data[j][i]) * ((int32_t)band->stepsize) + (1 << 15)) >> 16;
935 }
936 return;
937}
938
939/* Inverse ICT parameters in float and integer.
940 * int value = (float value) * (1<<16) */
941static const float f_ict_params[4] = {
942 1.402f,
943 0.34413f,
944 0.71414f,
945 1.772f
946};
947static const int i_ict_params[4] = {
948 91881,
949 22553,
950 46802,
951 116130
952};
953
954static int mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
955{
956 int i, csize = 1;
957 int ret = 0;
958 int32_t *src[3], i0, i1, i2;
959 float *srcf[3], i0f, i1f, i2f;
960
961 for (i = 0; i < 3; i++)
962 if (tile->codsty[0].transform == FF_DWT97)
963 srcf[i] = tile->comp[i].data;
964 else
965 src[i] = (int32_t *)tile->comp[i].data;
966
967 for (i = 0; i < 2; i++)
968 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
969 switch (tile->codsty[0].transform) {
970 case FF_DWT97:
971 for (i = 0; i < csize; i++) {
972 i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
973 i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
974 - (f_ict_params[2] * *srcf[2]);
975 i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
976 *srcf[0]++ = i0f;
977 *srcf[1]++ = i1f;
978 *srcf[2]++ = i2f;
979 }
980 break;
981 case FF_DWT97_INT:
982 for (i = 0; i < csize; i++) {
983 i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
984 i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
985 - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
986 i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
987 *src[0]++ = i0;
988 *src[1]++ = i1;
989 *src[2]++ = i2;
990 }
991 break;
992 case FF_DWT53:
993 for (i = 0; i < csize; i++) {
994 i1 = *src[0] - (*src[2] + *src[1] >> 2);
995 i0 = i1 + *src[2];
996 i2 = i1 + *src[1];
997 *src[0]++ = i0;
998 *src[1]++ = i1;
999 *src[2]++ = i2;
1000 }
1001 break;
1002 }
1003 return ret;
1004}
1005
1006static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1007 AVFrame *picture)
1008{
1009 int compno, reslevelno, bandno;
1010 int x, y;
1011
1012 uint8_t *line;
1013 Jpeg2000T1Context t1;
1014 /* Loop on tile components */
1015
1016 for (compno = 0; compno < s->ncomponents; compno++) {
1017 Jpeg2000Component *comp = tile->comp + compno;
1018 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1019 /* Loop on resolution levels */
1020 for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1021 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1022 /* Loop on bands */
1023 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1024 uint16_t nb_precincts, precno;
1025 Jpeg2000Band *band = rlevel->band + bandno;
1026 int cblkno = 0, bandpos;
1027 bandpos = bandno + (reslevelno > 0);
1028
1029 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1030 /* Loop on precincts */
1031 for (precno = 0; precno < nb_precincts; precno++) {
1032 Jpeg2000Prec *prec = band->prec + precno;
1033
1034 /* Loop on codeblocks */
1035 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1036 int x, y;
1037 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1038 decode_cblk(s, codsty, &t1, cblk,
1039 cblk->coord[0][1] - cblk->coord[0][0],
1040 cblk->coord[1][1] - cblk->coord[1][0],
1041 bandpos);
1042
1043 /* Manage band offsets */
1044 x = cblk->coord[0][0];
1045 y = cblk->coord[1][0];
1046 if ((reslevelno > 0) && ((bandno + 1) & 1)) {
1047 Jpeg2000ResLevel *pres = comp->reslevel + (reslevelno - 1);
1048 x += pres->coord[0][1] - pres->coord[0][0];
1049 }
1050 if ((reslevelno > 0) && ((bandno + 1) & 2)) {
1051 Jpeg2000ResLevel *pres = comp->reslevel + (reslevelno - 1);
1052 y += pres->coord[1][1] - pres->coord[1][0];
1053 }
1054
1055 if (s->avctx->flags & CODEC_FLAG_BITEXACT)
1056 dequantization_int(x, y, cblk, comp, &t1, band);
1057 else
1058 dequantization_float(x, y, cblk, comp, &t1, band);
1059 } /* end cblk */
1060 } /*end prec */
1061 } /* end band */
1062 } /* end reslevel */
1063
1064 /* inverse DWT */
1065 ff_dwt_decode(&comp->dwt, comp->data);
1066 } /*end comp */
1067
1068 /* inverse MCT transformation */
1069 if (tile->codsty[0].mct)
1070 mct_decode(s, tile);
1071
7c57a582 1072 if (s->avctx->pix_fmt == AV_PIX_FMT_BGRA) // RGBA -> BGRA
c81a7063
NB
1073 FFSWAP(float *, tile->comp[0].data, tile->comp[2].data);
1074
1075 if (s->precision <= 8) {
1076 for (compno = 0; compno < s->ncomponents; compno++) {
1077 Jpeg2000Component *comp = tile->comp + compno;
1078 int32_t *datap = (int32_t *)comp->data;
1079 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1080 line = picture->data[0] + y * picture->linesize[0];
1081 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1082 uint8_t *dst;
1083
1084 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1085 dst = line + x * s->ncomponents + compno;
1086
1087 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) {
1088 *datap += 1 << (s->cbps[compno] - 1);
1089 if (*datap < 0)
1090 *datap = 0;
1091 else if (*datap >= (1 << s->cbps[compno]))
1092 *datap = (1 << s->cbps[compno]) - 1;
1093 *dst = *datap++;
1094 dst += s->ncomponents;
1095 }
1096 line += picture->linesize[0];
1097 }
1098 }
1099 } else {
1100 for (compno = 0; compno < s->ncomponents; compno++) {
1101 Jpeg2000Component *comp = tile->comp + compno;
1102 float *datap = comp->data;
1103 int32_t *i_datap = (int32_t *) comp->data;
1104 uint16_t *linel;
1105
1106 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1107 linel = (uint16_t *)picture->data[0] + y * (picture->linesize[0] >> 1);
1108 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1109 uint16_t *dst;
1110 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1111 dst = linel + (x * s->ncomponents + compno);
1112 for (; x < s->avctx->width; x += s->cdx[compno]) {
1113 int16_t val;
1114 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1115 if (s->avctx->flags & CODEC_FLAG_BITEXACT)
1116 val = *i_datap + (1 << (s->cbps[compno] - 1));
1117 else
1118 val = lrintf(*datap) + (1 << (s->cbps[compno] - 1));
1119 val = av_clip(val, 0, (1 << s->cbps[compno]) - 1);
1120 /* align 12 bit values in little-endian mode */
1121 *dst = val << 4;
1122 datap++;
1123 i_datap++;
1124 dst += s->ncomponents;
1125 }
1126 linel += picture->linesize[0] >> 1;
1127 }
1128 }
1129 }
1130 return 0;
1131}
1132
1133static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1134{
1135 int tileno, compno;
1136 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1137 for (compno = 0; compno < s->ncomponents; compno++) {
1138 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1139 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1140
1141 ff_jpeg2000_cleanup(comp, codsty);
1142 }
1143 av_freep(&s->tile[tileno].comp);
1144 }
1145 av_freep(&s->tile);
1146}
1147
1148static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1149{
1150 Jpeg2000CodingStyle *codsty = s->codsty;
1151 Jpeg2000QuantStyle *qntsty = s->qntsty;
1152 uint8_t *properties = s->properties;
1153
1154 for (;;) {
1155 int len, ret = 0;
1156 uint16_t marker;
1a3598aa 1157 int oldpos;
c81a7063 1158
1a3598aa 1159 if (bytestream2_get_bytes_left(&s->g) < 2) {
c81a7063
NB
1160 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1161 break;
1162 }
1163
1a3598aa
MN
1164 marker = bytestream2_get_be16u(&s->g);
1165 oldpos = bytestream2_tell(&s->g);
c81a7063
NB
1166
1167 if (marker == JPEG2000_EOC)
1168 break;
1169
1a3598aa 1170 if (bytestream2_get_bytes_left(&s->g) < 2)
5efadcb8 1171 return AVERROR_INVALIDDATA;
1a3598aa 1172 len = bytestream2_get_be16u(&s->g);
c81a7063
NB
1173 switch (marker) {
1174 case JPEG2000_SIZ:
1175 ret = get_siz(s);
1176 break;
1177 case JPEG2000_COC:
1178 ret = get_coc(s, codsty, properties);
1179 break;
1180 case JPEG2000_COD:
1181 ret = get_cod(s, codsty, properties);
1182 break;
1183 case JPEG2000_QCC:
1184 ret = get_qcc(s, len, qntsty, properties);
1185 break;
1186 case JPEG2000_QCD:
1187 ret = get_qcd(s, len, qntsty, properties);
1188 break;
1189 case JPEG2000_SOT:
1190 ret = get_sot(s, len);
1191 break;
1192 case JPEG2000_COM:
1193 // the comment is ignored
1a3598aa 1194 bytestream2_skip(&s->g, len - 2);
c81a7063
NB
1195 break;
1196 case JPEG2000_TLM:
1197 // Tile-part lengths
1198 ret = get_tlm(s, len);
1199 break;
1200 default:
1201 av_log(s->avctx, AV_LOG_ERROR,
1a3598aa
MN
1202 "unsupported marker 0x%.4X at pos 0x%X\n",
1203 marker, bytestream2_tell(&s->g) - 4);
1204 bytestream2_skip(&s->g, len - 2);
c81a7063
NB
1205 break;
1206 }
1a3598aa 1207 if (((bytestream2_tell(&s->g) - oldpos != len) && (marker != JPEG2000_SOT)) || ret) {
c81a7063
NB
1208 av_log(s->avctx, AV_LOG_ERROR,
1209 "error during processing marker segment %.4x\n", marker);
1210 return ret ? ret : -1;
1211 }
1212 }
1213 return 0;
1214}
1215
1216/* Read bit stream packets --> T2 operation. */
1217static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1218{
1219 int ret = 0;
1220 Jpeg2000Tile *tile = s->tile + s->curtileno;
1221
1222 if (ret = init_tile(s, s->curtileno))
1223 return ret;
1224 if (ret = jpeg2000_decode_packets(s, tile))
1225 return ret;
1226
1227 return 0;
1228}
1229
1230static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1231{
1a3598aa 1232 uint32_t atom_size, atom;
c81a7063
NB
1233 int found_codestream = 0, search_range = 10;
1234
1a3598aa
MN
1235 while(!found_codestream && search_range
1236 &&
1237 bytestream2_get_bytes_left(&s->g) >= 8) {
1238 atom_size = bytestream2_get_be32u(&s->g);
1239 atom = bytestream2_get_be32u(&s->g);
1240 if (atom == JP2_CODESTREAM) {
c81a7063 1241 found_codestream = 1;
c81a7063 1242 } else {
1a3598aa
MN
1243 if (bytestream2_get_bytes_left(&s->g) < atom_size - 8)
1244 return 0;
1245 bytestream2_skipu(&s->g, atom_size - 8);
c81a7063
NB
1246 search_range--;
1247 }
1248 }
1249
1250 if (found_codestream)
1251 return 1;
1252 return 0;
1253}
1254
1255static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1256 int *got_frame, AVPacket *avpkt)
1257{
1258 Jpeg2000DecoderContext *s = avctx->priv_data;
2e2d2466 1259 ThreadFrame frame = { .f = data };
c81a7063
NB
1260 AVFrame *picture = data;
1261 int tileno, ret;
1262
1263 s->avctx = avctx;
1a3598aa 1264 bytestream2_init(&s->g, avpkt->data, avpkt->size);
c81a7063
NB
1265 s->curtileno = 0; // TODO: only one tile in DCI JP2K. to implement for more tiles
1266
1267 // reduction factor, i.e number of resolution levels to skip
1268 s->reduction_factor = s->lowres;
1269
1a3598aa 1270 if (bytestream2_get_bytes_left(&s->g) < 2)
5efadcb8 1271 return AVERROR_INVALIDDATA;
c81a7063
NB
1272
1273 // check if the image is in jp2 format
1a3598aa
MN
1274 if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1275 (bytestream2_get_be32u(&s->g) == 12) &&
1276 (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1277 (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
c81a7063
NB
1278 if (!jp2_find_codestream(s)) {
1279 av_log(avctx, AV_LOG_ERROR,
5efadcb8
LB
1280 "Could not find Jpeg2000 codestream atom.\n");
1281 return AVERROR_INVALIDDATA;
c81a7063 1282 }
1a3598aa
MN
1283 } else {
1284 bytestream2_seek(&s->g, 0, SEEK_SET);
1285 if (bytestream2_peek_be16(&s->g) != JPEG2000_SOC)
1286 bytestream2_skip(&s->g, 8);
c81a7063
NB
1287 }
1288
1a3598aa 1289 if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
c81a7063 1290 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
5efadcb8 1291 return AVERROR_INVALIDDATA;
c81a7063
NB
1292 }
1293 if (ret = jpeg2000_read_main_headers(s))
45a1694f 1294 goto end;
c81a7063
NB
1295
1296 /* get picture buffer */
2e2d2466
NB
1297 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
1298 av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed.\n");
45a1694f 1299 goto end;
c81a7063
NB
1300 }
1301 picture->pict_type = AV_PICTURE_TYPE_I;
1302 picture->key_frame = 1;
1303
1304 if (ret = jpeg2000_read_bitstream_packets(s))
45a1694f 1305 goto end;
c81a7063
NB
1306 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1307 if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
45a1694f 1308 goto end;
c81a7063
NB
1309
1310 *got_frame = 1;
1311
1a3598aa
MN
1312 return bytestream2_tell(&s->g);
1313
45a1694f
JG
1314end:
1315 jpeg2000_dec_cleanup(s);
1a3598aa 1316 return ret;
c81a7063
NB
1317}
1318
70f96615
JG
1319static void jpeg2000_init_static_data(AVCodec *codec)
1320{
1321 ff_jpeg2000_init_tier1_luts();
1322}
1323
c81a7063
NB
1324#define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1325#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1326
1327static const AVOption options[] = {
1328 { "lowres", "Lower the decoding resolution by a power of two",
1329 OFFSET(lowres), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1330 { NULL },
1331};
1332
1333static const AVProfile profiles[] = {
1334 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
1335 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
1336 { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
1337 { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
1338 { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
1339 { FF_PROFILE_UNKNOWN },
1340};
1341
1342static const AVClass class = {
1343 .class_name = "jpeg2000",
1344 .item_name = av_default_item_name,
1345 .option = options,
1346 .version = LIBAVUTIL_VERSION_INT,
1347};
1348
1349AVCodec ff_jpeg2000_decoder = {
70f96615
JG
1350 .name = "jpeg2000",
1351 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1352 .type = AVMEDIA_TYPE_VIDEO,
1353 .id = AV_CODEC_ID_JPEG2000,
1354 .capabilities = CODEC_CAP_FRAME_THREADS,
1355 .priv_data_size = sizeof(Jpeg2000DecoderContext),
1356 .init_static_data = jpeg2000_init_static_data,
1357 .decode = jpeg2000_decode_frame,
1358 .priv_class = &class,
7c57a582
AK
1359 .pix_fmts = (enum AVPixelFormat[]) { AV_PIX_FMT_XYZ12,
1360 AV_PIX_FMT_GRAY8,
1361 -1 },
70f96615 1362 .profiles = NULL_IF_CONFIG_SMALL(profiles)
c81a7063 1363};