2 * JPEG 2000 image decoder
3 * Copyright (c) 2007 Kamil Nowosad
4 * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
6 * This file is part of FFmpeg.
8 * FFmpeg 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.
13 * FFmpeg 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.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * JPEG 2000 image decoder
28 #include "libavutil/avassert.h"
29 #include "libavutil/common.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/pixdesc.h"
33 #include "bytestream.h"
38 #define JP2_SIG_TYPE 0x6A502020
39 #define JP2_SIG_VALUE 0x0D0A870A
40 #define JP2_CODESTREAM 0x6A703263
41 #define JP2_HEADER 0x6A703268
46 typedef struct Jpeg2000TilePart {
47 uint8_t tile_index; // Tile index who refers the tile-part
48 const uint8_t *tp_end;
49 GetByteContext tpg; // bit stream in tile-part
52 /* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
53 * one per component, so tile_part elements have a size of 3 */
54 typedef struct Jpeg2000Tile {
55 Jpeg2000Component *comp;
56 uint8_t properties[4];
57 Jpeg2000CodingStyle codsty[4];
58 Jpeg2000QuantStyle qntsty[4];
59 Jpeg2000TilePart tile_part[4];
60 uint16_t tp_idx; // Tile-part index
63 typedef struct Jpeg2000DecoderContext {
65 AVCodecContext *avctx;
69 int image_offset_x, image_offset_y;
70 int tile_offset_x, tile_offset_y;
71 uint8_t cbps[4]; // bits per sample in particular components
72 uint8_t sgnd[4]; // if a component is signed
73 uint8_t properties[4];
78 uint32_t palette[256];
81 int tile_width, tile_height;
82 unsigned numXtiles, numYtiles;
85 Jpeg2000CodingStyle codsty[4];
86 Jpeg2000QuantStyle qntsty[4];
94 /*options parameters*/
96 } Jpeg2000DecoderContext;
98 /* get_bits functions for JPEG2000 packet bitstream
99 * It is a get_bit function with a bit-stuffing routine. If the value of the
100 * byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB.
101 * cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */
102 static int get_bits(Jpeg2000DecoderContext *s, int n)
108 if (s->bit_index == 0) {
109 s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);
112 res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;
117 static void jpeg2000_flush(Jpeg2000DecoderContext *s)
119 if (bytestream2_get_byte(&s->g) == 0xff)
120 bytestream2_skip(&s->g, 1);
124 /* decode the value stored in node */
125 static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node,
128 Jpeg2000TgtNode *stack[30];
129 int sp = -1, curval = 0;
132 return AVERROR_INVALIDDATA;
134 while (node && !node->vis) {
142 curval = stack[sp]->val;
144 while (curval < threshold && sp >= 0) {
145 if (curval < stack[sp]->val)
146 curval = stack[sp]->val;
147 while (curval < threshold) {
149 if ((ret = get_bits(s, 1)) > 0) {
157 stack[sp]->val = curval;
163 static int pix_fmt_match(enum AVPixelFormat pix_fmt, int components,
164 int bpc, uint32_t log2_chroma_wh, int pal8)
167 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
169 if (desc->nb_components != components) {
173 switch (components) {
175 match = match && desc->comp[3].depth_minus1 + 1 >= bpc &&
176 (log2_chroma_wh >> 14 & 3) == 0 &&
177 (log2_chroma_wh >> 12 & 3) == 0;
179 match = match && desc->comp[2].depth_minus1 + 1 >= bpc &&
180 (log2_chroma_wh >> 10 & 3) == desc->log2_chroma_w &&
181 (log2_chroma_wh >> 8 & 3) == desc->log2_chroma_h;
183 match = match && desc->comp[1].depth_minus1 + 1 >= bpc &&
184 (log2_chroma_wh >> 6 & 3) == desc->log2_chroma_w &&
185 (log2_chroma_wh >> 4 & 3) == desc->log2_chroma_h;
188 match = match && desc->comp[0].depth_minus1 + 1 >= bpc &&
189 (log2_chroma_wh >> 2 & 3) == 0 &&
190 (log2_chroma_wh & 3) == 0 &&
191 (desc->flags & AV_PIX_FMT_FLAG_PAL) == pal8 * AV_PIX_FMT_FLAG_PAL;
196 // pix_fmts with lower bpp have to be listed before
197 // similar pix_fmts with higher bpp.
198 #define RGB_PIXEL_FORMATS AV_PIX_FMT_PAL8,AV_PIX_FMT_RGB24,AV_PIX_FMT_RGBA,AV_PIX_FMT_RGB48,AV_PIX_FMT_RGBA64
199 #define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8,AV_PIX_FMT_GRAY8A,AV_PIX_FMT_GRAY16
200 #define YUV_PIXEL_FORMATS AV_PIX_FMT_YUV410P,AV_PIX_FMT_YUV411P,AV_PIX_FMT_YUVA420P, \
201 AV_PIX_FMT_YUV420P,AV_PIX_FMT_YUV422P,AV_PIX_FMT_YUVA422P, \
202 AV_PIX_FMT_YUV440P,AV_PIX_FMT_YUV444P,AV_PIX_FMT_YUVA444P, \
203 AV_PIX_FMT_YUV420P9,AV_PIX_FMT_YUV422P9,AV_PIX_FMT_YUV444P9, \
204 AV_PIX_FMT_YUVA420P9,AV_PIX_FMT_YUVA422P9,AV_PIX_FMT_YUVA444P9, \
205 AV_PIX_FMT_YUV420P10,AV_PIX_FMT_YUV422P10,AV_PIX_FMT_YUV444P10, \
206 AV_PIX_FMT_YUVA420P10,AV_PIX_FMT_YUVA422P10,AV_PIX_FMT_YUVA444P10, \
207 AV_PIX_FMT_YUV420P12,AV_PIX_FMT_YUV422P12,AV_PIX_FMT_YUV444P12, \
208 AV_PIX_FMT_YUV420P14,AV_PIX_FMT_YUV422P14,AV_PIX_FMT_YUV444P14, \
209 AV_PIX_FMT_YUV420P16,AV_PIX_FMT_YUV422P16,AV_PIX_FMT_YUV444P16, \
210 AV_PIX_FMT_YUVA420P16,AV_PIX_FMT_YUVA422P16,AV_PIX_FMT_YUVA444P16
211 #define XYZ_PIXEL_FORMATS AV_PIX_FMT_XYZ12
213 static const enum AVPixelFormat rgb_pix_fmts[] = {RGB_PIXEL_FORMATS};
214 static const enum AVPixelFormat gray_pix_fmts[] = {GRAY_PIXEL_FORMATS};
215 static const enum AVPixelFormat yuv_pix_fmts[] = {YUV_PIXEL_FORMATS};
216 static const enum AVPixelFormat xyz_pix_fmts[] = {XYZ_PIXEL_FORMATS};
217 static const enum AVPixelFormat all_pix_fmts[] = {RGB_PIXEL_FORMATS,
222 /* marker segments */
223 /* get sizes and offsets of image, tiles; number of components */
224 static int get_siz(Jpeg2000DecoderContext *s)
228 uint32_t log2_chroma_wh = 0;
229 const enum AVPixelFormat *possible_fmts = NULL;
230 int possible_fmts_nb = 0;
232 if (bytestream2_get_bytes_left(&s->g) < 36)
233 return AVERROR_INVALIDDATA;
235 s->avctx->profile = bytestream2_get_be16u(&s->g); // Rsiz
236 s->width = bytestream2_get_be32u(&s->g); // Width
237 s->height = bytestream2_get_be32u(&s->g); // Height
238 s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz
239 s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz
240 s->tile_width = bytestream2_get_be32u(&s->g); // XTSiz
241 s->tile_height = bytestream2_get_be32u(&s->g); // YTSiz
242 s->tile_offset_x = bytestream2_get_be32u(&s->g); // XT0Siz
243 s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz
244 ncomponents = bytestream2_get_be16u(&s->g); // CSiz
246 if (ncomponents <= 0) {
247 av_log(s->avctx, AV_LOG_ERROR, "Invalid number of components: %d\n",
249 return AVERROR_INVALIDDATA;
252 if (ncomponents > 4) {
253 avpriv_request_sample(s->avctx, "Support for %d components",
255 return AVERROR_PATCHWELCOME;
258 s->ncomponents = ncomponents;
260 if (s->tile_width <= 0 || s->tile_height <= 0) {
261 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile dimension %dx%d.\n",
262 s->tile_width, s->tile_height);
263 return AVERROR_INVALIDDATA;
266 if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents)
267 return AVERROR_INVALIDDATA;
269 for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
270 uint8_t x = bytestream2_get_byteu(&s->g);
271 s->cbps[i] = (x & 0x7f) + 1;
272 s->precision = FFMAX(s->cbps[i], s->precision);
273 s->sgnd[i] = !!(x & 0x80);
274 s->cdx[i] = bytestream2_get_byteu(&s->g);
275 s->cdy[i] = bytestream2_get_byteu(&s->g);
276 if (!s->cdx[i] || !s->cdy[i]) {
277 av_log(s->avctx, AV_LOG_ERROR, "Invalid sample seperation\n");
278 return AVERROR_INVALIDDATA;
280 log2_chroma_wh |= s->cdy[i] >> 1 << i * 4 | s->cdx[i] >> 1 << i * 4 + 2;
283 s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
284 s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
286 if (s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(*s->tile)) {
287 s->numXtiles = s->numYtiles = 0;
288 return AVERROR(EINVAL);
291 s->tile = av_mallocz_array(s->numXtiles * s->numYtiles, sizeof(*s->tile));
293 s->numXtiles = s->numYtiles = 0;
294 return AVERROR(ENOMEM);
297 for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
298 Jpeg2000Tile *tile = s->tile + i;
300 tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
302 return AVERROR(ENOMEM);
305 /* compute image size with reduction factor */
306 s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x,
307 s->reduction_factor);
308 s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
309 s->reduction_factor);
311 if (s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_2K ||
312 s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_4K) {
313 possible_fmts = xyz_pix_fmts;
314 possible_fmts_nb = FF_ARRAY_ELEMS(xyz_pix_fmts);
316 switch (s->colour_space) {
318 possible_fmts = rgb_pix_fmts;
319 possible_fmts_nb = FF_ARRAY_ELEMS(rgb_pix_fmts);
322 possible_fmts = gray_pix_fmts;
323 possible_fmts_nb = FF_ARRAY_ELEMS(gray_pix_fmts);
326 possible_fmts = yuv_pix_fmts;
327 possible_fmts_nb = FF_ARRAY_ELEMS(yuv_pix_fmts);
330 possible_fmts = all_pix_fmts;
331 possible_fmts_nb = FF_ARRAY_ELEMS(all_pix_fmts);
335 for (i = 0; i < possible_fmts_nb; ++i) {
336 if (pix_fmt_match(possible_fmts[i], ncomponents, s->precision, log2_chroma_wh, s->pal8)) {
337 s->avctx->pix_fmt = possible_fmts[i];
341 if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
342 av_log(s->avctx, AV_LOG_ERROR,
343 "Unknown pix_fmt, profile: %d, colour_space: %d, "
344 "components: %d, precision: %d, "
345 "cdx[1]: %d, cdy[1]: %d, cdx[2]: %d, cdy[2]: %d\n",
346 s->avctx->profile, s->colour_space, ncomponents, s->precision,
347 ncomponents > 2 ? s->cdx[1] : 0,
348 ncomponents > 2 ? s->cdy[1] : 0,
349 ncomponents > 2 ? s->cdx[2] : 0,
350 ncomponents > 2 ? s->cdy[2] : 0);
355 /* get common part for COD and COC segments */
356 static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
360 if (bytestream2_get_bytes_left(&s->g) < 5)
361 return AVERROR_INVALIDDATA;
363 /* nreslevels = number of resolution levels
364 = number of decomposition level +1 */
365 c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
366 if (c->nreslevels >= JPEG2000_MAX_RESLEVELS) {
367 av_log(s->avctx, AV_LOG_ERROR, "nreslevels %d is invalid\n", c->nreslevels);
368 return AVERROR_INVALIDDATA;
371 /* compute number of resolution levels to decode */
372 if (c->nreslevels < s->reduction_factor)
373 c->nreslevels2decode = 1;
375 c->nreslevels2decode = c->nreslevels - s->reduction_factor;
377 c->log2_cblk_width = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk width
378 c->log2_cblk_height = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk height
380 if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
381 c->log2_cblk_width + c->log2_cblk_height > 12) {
382 av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
383 return AVERROR_INVALIDDATA;
386 c->cblk_style = bytestream2_get_byteu(&s->g);
387 if (c->cblk_style != 0) { // cblk style
388 av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
390 c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
391 /* set integer 9/7 DWT in case of BITEXACT flag */
392 if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
393 c->transform = FF_DWT97_INT;
395 if (c->csty & JPEG2000_CSTY_PREC) {
397 for (i = 0; i < c->nreslevels; i++) {
398 byte = bytestream2_get_byte(&s->g);
399 c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
400 c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
403 memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
404 memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
409 /* get coding parameters for a particular tile or whole image*/
410 static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
413 Jpeg2000CodingStyle tmp;
416 if (bytestream2_get_bytes_left(&s->g) < 5)
417 return AVERROR_INVALIDDATA;
419 tmp.csty = bytestream2_get_byteu(&s->g);
421 // get progression order
422 tmp.prog_order = bytestream2_get_byteu(&s->g);
424 tmp.nlayers = bytestream2_get_be16u(&s->g);
425 tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
427 if (tmp.mct && s->ncomponents < 3) {
428 av_log(s->avctx, AV_LOG_ERROR,
429 "MCT %d with too few components (%d)\n",
430 tmp.mct, s->ncomponents);
431 return AVERROR_INVALIDDATA;
434 if ((ret = get_cox(s, &tmp)) < 0)
437 for (compno = 0; compno < s->ncomponents; compno++)
438 if (!(properties[compno] & HAD_COC))
439 memcpy(c + compno, &tmp, sizeof(tmp));
443 /* Get coding parameters for a component in the whole image or a
444 * particular tile. */
445 static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
450 if (bytestream2_get_bytes_left(&s->g) < 2)
451 return AVERROR_INVALIDDATA;
453 compno = bytestream2_get_byteu(&s->g);
455 if (compno >= s->ncomponents) {
456 av_log(s->avctx, AV_LOG_ERROR,
457 "Invalid compno %d. There are %d components in the image.\n",
458 compno, s->ncomponents);
459 return AVERROR_INVALIDDATA;
463 c->csty = bytestream2_get_byteu(&s->g);
465 if ((ret = get_cox(s, c)) < 0)
468 properties[compno] |= HAD_COC;
472 /* Get common part for QCD and QCC segments. */
473 static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
477 if (bytestream2_get_bytes_left(&s->g) < 1)
478 return AVERROR_INVALIDDATA;
480 x = bytestream2_get_byteu(&s->g); // Sqcd
482 q->nguardbits = x >> 5;
483 q->quantsty = x & 0x1f;
485 if (q->quantsty == JPEG2000_QSTY_NONE) {
487 if (bytestream2_get_bytes_left(&s->g) < n ||
488 n > JPEG2000_MAX_DECLEVELS*3)
489 return AVERROR_INVALIDDATA;
490 for (i = 0; i < n; i++)
491 q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
492 } else if (q->quantsty == JPEG2000_QSTY_SI) {
493 if (bytestream2_get_bytes_left(&s->g) < 2)
494 return AVERROR_INVALIDDATA;
495 x = bytestream2_get_be16u(&s->g);
496 q->expn[0] = x >> 11;
497 q->mant[0] = x & 0x7ff;
498 for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
499 int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
500 q->expn[i] = curexpn;
501 q->mant[i] = q->mant[0];
505 if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
506 n > JPEG2000_MAX_DECLEVELS*3)
507 return AVERROR_INVALIDDATA;
508 for (i = 0; i < n; i++) {
509 x = bytestream2_get_be16u(&s->g);
510 q->expn[i] = x >> 11;
511 q->mant[i] = x & 0x7ff;
517 /* Get quantization parameters for a particular tile or a whole image. */
518 static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
521 Jpeg2000QuantStyle tmp;
524 if ((ret = get_qcx(s, n, &tmp)) < 0)
526 for (compno = 0; compno < s->ncomponents; compno++)
527 if (!(properties[compno] & HAD_QCC))
528 memcpy(q + compno, &tmp, sizeof(tmp));
532 /* Get quantization parameters for a component in the whole image
533 * on in a particular tile. */
534 static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
539 if (bytestream2_get_bytes_left(&s->g) < 1)
540 return AVERROR_INVALIDDATA;
542 compno = bytestream2_get_byteu(&s->g);
544 if (compno >= s->ncomponents) {
545 av_log(s->avctx, AV_LOG_ERROR,
546 "Invalid compno %d. There are %d components in the image.\n",
547 compno, s->ncomponents);
548 return AVERROR_INVALIDDATA;
551 properties[compno] |= HAD_QCC;
552 return get_qcx(s, n - 1, q + compno);
555 /* Get start of tile segment. */
556 static int get_sot(Jpeg2000DecoderContext *s, int n)
558 Jpeg2000TilePart *tp;
563 if (bytestream2_get_bytes_left(&s->g) < 8)
564 return AVERROR_INVALIDDATA;
567 Isot = bytestream2_get_be16u(&s->g); // Isot
568 if (Isot >= s->numXtiles * s->numYtiles)
569 return AVERROR_INVALIDDATA;
572 Psot = bytestream2_get_be32u(&s->g); // Psot
573 TPsot = bytestream2_get_byteu(&s->g); // TPsot
575 /* Read TNSot but not used */
576 bytestream2_get_byteu(&s->g); // TNsot
578 if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
579 av_log(s->avctx, AV_LOG_ERROR, "Psot %d too big\n", Psot);
580 return AVERROR_INVALIDDATA;
583 if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) {
584 avpriv_request_sample(s->avctx, "Support for %d components", TPsot);
585 return AVERROR_PATCHWELCOME;
588 s->tile[Isot].tp_idx = TPsot;
589 tp = s->tile[Isot].tile_part + TPsot;
590 tp->tile_index = Isot;
591 tp->tp_end = s->g.buffer + Psot - n - 2;
594 Jpeg2000Tile *tile = s->tile + s->curtileno;
597 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));
598 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));
604 /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
605 * Used to know the number of tile parts and lengths.
606 * There may be multiple TLMs in the header.
607 * TODO: The function is not used for tile-parts management, nor anywhere else.
608 * It can be useful to allocate memory for tile parts, before managing the SOT
609 * markers. Parsing the TLM header is needed to increment the input header
611 * This marker is mandatory for DCI. */
612 static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
614 uint8_t Stlm, ST, SP, tile_tlm, i;
615 bytestream2_get_byte(&s->g); /* Ztlm: skipped */
616 Stlm = bytestream2_get_byte(&s->g);
618 // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
619 ST = (Stlm >> 4) & 0x03;
620 // TODO: Manage case of ST = 0b11 --> raise error
621 SP = (Stlm >> 6) & 0x01;
622 tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
623 for (i = 0; i < tile_tlm; i++) {
628 bytestream2_get_byte(&s->g);
631 bytestream2_get_be16(&s->g);
634 bytestream2_get_be32(&s->g);
638 bytestream2_get_be16(&s->g);
640 bytestream2_get_be32(&s->g);
646 static int init_tile(Jpeg2000DecoderContext *s, int tileno)
649 int tilex = tileno % s->numXtiles;
650 int tiley = tileno / s->numXtiles;
651 Jpeg2000Tile *tile = s->tile + tileno;
654 return AVERROR(ENOMEM);
656 for (compno = 0; compno < s->ncomponents; compno++) {
657 Jpeg2000Component *comp = tile->comp + compno;
658 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
659 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
660 int ret; // global bandno
662 comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
663 comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
664 comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
665 comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
667 comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
668 comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
669 comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
670 comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
672 if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
673 s->cbps[compno], s->cdx[compno],
674 s->cdy[compno], s->avctx))
680 /* Read the number of coding passes. */
681 static int getnpasses(Jpeg2000DecoderContext *s)
688 if ((num = get_bits(s, 2)) != 3)
689 return num < 0 ? num : 3 + num;
690 if ((num = get_bits(s, 5)) != 31)
691 return num < 0 ? num : 6 + num;
692 num = get_bits(s, 7);
693 return num < 0 ? num : 37 + num;
696 static int getlblockinc(Jpeg2000DecoderContext *s)
699 while (ret = get_bits(s, 1)) {
707 static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
708 Jpeg2000CodingStyle *codsty,
709 Jpeg2000ResLevel *rlevel, int precno,
710 int layno, uint8_t *expn, int numgbits)
712 int bandno, cblkno, ret, nb_code_blocks;
714 if (!(ret = get_bits(s, 1))) {
720 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
721 Jpeg2000Band *band = rlevel->band + bandno;
722 Jpeg2000Prec *prec = band->prec + precno;
724 if (band->coord[0][0] == band->coord[0][1] ||
725 band->coord[1][0] == band->coord[1][1])
727 nb_code_blocks = prec->nb_codeblocks_height *
728 prec->nb_codeblocks_width;
729 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
730 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
731 int incl, newpasses, llen;
734 incl = get_bits(s, 1);
736 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
742 if (!cblk->npasses) {
743 int v = expn[bandno] + numgbits - 1 -
744 tag_tree_decode(s, prec->zerobits + cblkno, 100);
746 av_log(s->avctx, AV_LOG_ERROR,
747 "nonzerobits %d invalid\n", v);
748 return AVERROR_INVALIDDATA;
750 cblk->nonzerobits = v;
752 if ((newpasses = getnpasses(s)) < 0)
754 if ((llen = getlblockinc(s)) < 0)
756 cblk->lblock += llen;
757 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
759 if (ret > sizeof(cblk->data)) {
760 avpriv_request_sample(s->avctx,
761 "Block with lengthinc greater than %zu",
763 return AVERROR_PATCHWELCOME;
765 cblk->lengthinc = ret;
766 cblk->npasses += newpasses;
771 if (codsty->csty & JPEG2000_CSTY_EPH) {
772 if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
773 bytestream2_skip(&s->g, 2);
775 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
778 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
779 Jpeg2000Band *band = rlevel->band + bandno;
780 Jpeg2000Prec *prec = band->prec + precno;
782 nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
783 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
784 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
785 if ( bytestream2_get_bytes_left(&s->g) < cblk->lengthinc
786 || sizeof(cblk->data) < cblk->length + cblk->lengthinc + 2
788 return AVERROR_INVALIDDATA;
790 bytestream2_get_bufferu(&s->g, cblk->data + cblk->length, cblk->lengthinc);
791 cblk->length += cblk->lengthinc;
798 static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
801 int layno, reslevelno, compno, precno, ok_reslevel;
805 switch (tile->codsty[0].prog_order) {
806 case JPEG2000_PGOD_RLCP:
807 avpriv_request_sample(s->avctx, "Progression order RLCP");
809 case JPEG2000_PGOD_LRCP:
810 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
812 for (reslevelno = 0; ok_reslevel; reslevelno++) {
814 for (compno = 0; compno < s->ncomponents; compno++) {
815 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
816 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
817 if (reslevelno < codsty->nreslevels) {
818 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
821 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
822 if ((ret = jpeg2000_decode_packet(s,
825 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
826 qntsty->nguardbits)) < 0)
834 case JPEG2000_PGOD_CPRL:
835 for (compno = 0; compno < s->ncomponents; compno++) {
836 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
837 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
839 /* Set bit stream buffer address according to tile-part.
840 * For DCinema one tile-part per component, so can be
841 * indexed by component. */
842 s->g = tile->tile_part[compno].tpg;
844 /* Position loop (y axis)
845 * TODO: Automate computing of step 256.
846 * Fixed here, but to be computed before entering here. */
847 for (y = 0; y < s->height; y += 256) {
848 /* Position loop (y axis)
849 * TODO: automate computing of step 256.
850 * Fixed here, but to be computed before entering here. */
851 for (x = 0; x < s->width; x += 256) {
852 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
854 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
855 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
857 if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
858 (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
861 if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
862 (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
865 // check if a precinct exists
866 prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
867 prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
868 precno = prcx + rlevel->num_precincts_x * prcy;
869 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
870 if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
872 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
873 qntsty->nguardbits)) < 0)
882 case JPEG2000_PGOD_RPCL:
883 avpriv_request_sample(s->avctx, "Progression order RPCL");
884 ret = AVERROR_PATCHWELCOME;
887 case JPEG2000_PGOD_PCRL:
888 avpriv_request_sample(s->avctx, "Progression order PCRL");
889 ret = AVERROR_PATCHWELCOME;
896 /* EOC marker reached */
897 bytestream2_skip(&s->g, 2);
902 /* TIER-1 routines */
903 static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
904 int bpno, int bandno, int bpass_csty_symbol,
905 int vert_causal_ctx_csty_symbol)
907 int mask = 3 << (bpno - 1), y0, x, y;
909 for (y0 = 0; y0 < height; y0 += 4)
910 for (x = 0; x < width; x++)
911 for (y = y0; y < height && y < y0 + 4; y++) {
912 if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
913 && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
915 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
916 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
917 if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {
918 int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
919 if (bpass_csty_symbol)
920 t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
922 t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
925 ff_jpeg2000_set_significance(t1, x, y,
928 t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
933 static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
939 phalf = 1 << (bpno - 1);
942 for (y0 = 0; y0 < height; y0 += 4)
943 for (x = 0; x < width; x++)
944 for (y = y0; y < height && y < y0 + 4; y++)
945 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
946 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
947 int r = ff_mqc_decode(&t1->mqc,
948 t1->mqc.cx_states + ctxno)
950 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
951 t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
955 static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
956 int width, int height, int bpno, int bandno,
957 int seg_symbols, int vert_causal_ctx_csty_symbol)
959 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
961 for (y0 = 0; y0 < height; y0 += 4) {
962 for (x = 0; x < width; x++) {
963 if (y0 + 3 < height &&
964 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
965 (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
966 (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
967 (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
968 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
970 runlen = ff_mqc_decode(&t1->mqc,
971 t1->mqc.cx_states + MQC_CX_UNI);
972 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
981 for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
983 if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
985 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
986 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
987 dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,
993 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
995 t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
996 t1->mqc.cx_states + ctxno) ^
999 ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
1002 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
1008 val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1009 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1010 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1011 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1013 av_log(s->avctx, AV_LOG_ERROR,
1014 "Segmentation symbol value incorrect\n");
1018 static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
1019 Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
1020 int width, int height, int bandpos)
1022 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
1023 int clnpass_cnt = 0;
1024 int bpass_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_BYPASS;
1025 int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC;
1027 for (y = 0; y < height; y++)
1028 memset(t1->data[y], 0, width * sizeof(**t1->data));
1030 /* If code-block contains no compressed data: nothing to do. */
1034 for (y = 0; y < height + 2; y++)
1035 memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags));
1037 cblk->data[cblk->length] = 0xff;
1038 cblk->data[cblk->length+1] = 0xff;
1039 ff_mqc_initdec(&t1->mqc, cblk->data);
1044 decode_sigpass(t1, width, height, bpno + 1, bandpos,
1045 bpass_csty_symbol && (clnpass_cnt >= 4),
1046 vert_causal_ctx_csty_symbol);
1049 decode_refpass(t1, width, height, bpno + 1);
1050 if (bpass_csty_symbol && clnpass_cnt >= 4)
1051 ff_mqc_initdec(&t1->mqc, cblk->data);
1054 decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
1055 codsty->cblk_style & JPEG2000_CBLK_SEGSYM,
1056 vert_causal_ctx_csty_symbol);
1057 clnpass_cnt = clnpass_cnt + 1;
1058 if (bpass_csty_symbol && clnpass_cnt >= 4)
1059 ff_mqc_initdec(&t1->mqc, cblk->data);
1072 /* TODO: Verify dequantization for lossless case
1073 * comp->data can be float or int
1074 * band->stepsize can be float or int
1075 * depending on the type of DWT transformation.
1076 * see ISO/IEC 15444-1:2002 A.6.1 */
1078 /* Float dequantization of a codeblock.*/
1079 static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
1080 Jpeg2000Component *comp,
1081 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1084 int w = cblk->coord[0][1] - cblk->coord[0][0];
1085 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1086 float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1087 int *src = t1->data[j];
1088 for (i = 0; i < w; ++i)
1089 datap[i] = src[i] * band->f_stepsize;
1093 /* Integer dequantization of a codeblock.*/
1094 static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
1095 Jpeg2000Component *comp,
1096 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1099 int w = cblk->coord[0][1] - cblk->coord[0][0];
1100 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1101 int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1102 int *src = t1->data[j];
1103 for (i = 0; i < w; ++i)
1104 datap[i] = (src[i] * band->i_stepsize + (1 << 14)) >> 15;
1108 /* Inverse ICT parameters in float and integer.
1109 * int value = (float value) * (1<<16) */
1110 static const float f_ict_params[4] = {
1116 static const int i_ict_params[4] = {
1123 static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
1126 int32_t *src[3], i0, i1, i2;
1127 float *srcf[3], i0f, i1f, i2f;
1129 for (i = 0; i < 3; i++)
1130 if (tile->codsty[0].transform == FF_DWT97)
1131 srcf[i] = tile->comp[i].f_data;
1133 src [i] = tile->comp[i].i_data;
1135 for (i = 0; i < 2; i++)
1136 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
1138 switch (tile->codsty[0].transform) {
1140 for (i = 0; i < csize; i++) {
1141 i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
1142 i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
1143 - (f_ict_params[2] * *srcf[2]);
1144 i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
1151 for (i = 0; i < csize; i++) {
1152 i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
1153 i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
1154 - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
1155 i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
1162 for (i = 0; i < csize; i++) {
1163 i1 = *src[0] - (*src[2] + *src[1] >> 2);
1174 static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1177 int compno, reslevelno, bandno;
1181 Jpeg2000T1Context t1;
1183 /* Loop on tile components */
1184 for (compno = 0; compno < s->ncomponents; compno++) {
1185 Jpeg2000Component *comp = tile->comp + compno;
1186 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1188 /* Loop on resolution levels */
1189 for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1190 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1192 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1193 int nb_precincts, precno;
1194 Jpeg2000Band *band = rlevel->band + bandno;
1195 int cblkno = 0, bandpos;
1197 bandpos = bandno + (reslevelno > 0);
1199 if (band->coord[0][0] == band->coord[0][1] ||
1200 band->coord[1][0] == band->coord[1][1])
1203 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1204 /* Loop on precincts */
1205 for (precno = 0; precno < nb_precincts; precno++) {
1206 Jpeg2000Prec *prec = band->prec + precno;
1208 /* Loop on codeblocks */
1209 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1211 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1212 decode_cblk(s, codsty, &t1, cblk,
1213 cblk->coord[0][1] - cblk->coord[0][0],
1214 cblk->coord[1][1] - cblk->coord[1][0],
1217 x = cblk->coord[0][0];
1218 y = cblk->coord[1][0];
1220 if (codsty->transform == FF_DWT97)
1221 dequantization_float(x, y, cblk, comp, &t1, band);
1223 dequantization_int(x, y, cblk, comp, &t1, band);
1227 } /* end reslevel */
1230 ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data);
1233 /* inverse MCT transformation */
1234 if (tile->codsty[0].mct)
1235 mct_decode(s, tile);
1237 if (s->cdef[0] < 0) {
1238 for (x = 0; x < s->ncomponents; x++)
1240 if ((s->ncomponents & 1) == 0)
1241 s->cdef[s->ncomponents-1] = 0;
1244 if (s->precision <= 8) {
1245 for (compno = 0; compno < s->ncomponents; compno++) {
1246 Jpeg2000Component *comp = tile->comp + compno;
1247 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1248 float *datap = comp->f_data;
1249 int32_t *i_datap = comp->i_data;
1250 int cbps = s->cbps[compno];
1251 int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1252 int planar = !!picture->data[2];
1253 int pixelsize = planar ? 1 : s->ncomponents;
1257 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1260 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1261 line = picture->data[plane] + y * picture->linesize[plane];
1262 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1265 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1266 dst = line + x * pixelsize + compno*!planar;
1268 if (codsty->transform == FF_DWT97) {
1269 for (; x < w; x += s->cdx[compno]) {
1270 int val = lrintf(*datap) + (1 << (cbps - 1));
1271 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1272 val = av_clip(val, 0, (1 << cbps) - 1);
1273 *dst = val << (8 - cbps);
1278 for (; x < w; x += s->cdx[compno]) {
1279 int val = *i_datap + (1 << (cbps - 1));
1280 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1281 val = av_clip(val, 0, (1 << cbps) - 1);
1282 *dst = val << (8 - cbps);
1287 line += picture->linesize[plane];
1291 for (compno = 0; compno < s->ncomponents; compno++) {
1292 Jpeg2000Component *comp = tile->comp + compno;
1293 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1294 float *datap = comp->f_data;
1295 int32_t *i_datap = comp->i_data;
1297 int cbps = s->cbps[compno];
1298 int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1299 int planar = !!picture->data[2];
1300 int pixelsize = planar ? 1 : s->ncomponents;
1304 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1306 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1307 linel = (uint16_t *)picture->data[plane] + y * (picture->linesize[plane] >> 1);
1308 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1311 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1312 dst = linel + (x * pixelsize + compno*!planar);
1313 if (codsty->transform == FF_DWT97) {
1314 for (; x < w; x += s-> cdx[compno]) {
1315 int val = lrintf(*datap) + (1 << (cbps - 1));
1316 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1317 val = av_clip(val, 0, (1 << cbps) - 1);
1318 /* align 12 bit values in little-endian mode */
1319 *dst = val << (16 - cbps);
1324 for (; x < w; x += s-> cdx[compno]) {
1325 int val = *i_datap + (1 << (cbps - 1));
1326 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1327 val = av_clip(val, 0, (1 << cbps) - 1);
1328 /* align 12 bit values in little-endian mode */
1329 *dst = val << (16 - cbps);
1334 linel += picture->linesize[plane] >> 1;
1342 static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1345 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1346 for (compno = 0; compno < s->ncomponents; compno++) {
1347 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1348 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1350 ff_jpeg2000_cleanup(comp, codsty);
1352 av_freep(&s->tile[tileno].comp);
1355 s->numXtiles = s->numYtiles = 0;
1358 static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1360 Jpeg2000CodingStyle *codsty = s->codsty;
1361 Jpeg2000QuantStyle *qntsty = s->qntsty;
1362 uint8_t *properties = s->properties;
1369 if (bytestream2_get_bytes_left(&s->g) < 2) {
1370 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1374 marker = bytestream2_get_be16u(&s->g);
1375 oldpos = bytestream2_tell(&s->g);
1377 if (marker == JPEG2000_SOD) {
1379 Jpeg2000TilePart *tp;
1381 if (s->curtileno < 0) {
1382 av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n");
1383 return AVERROR_INVALIDDATA;
1386 tile = s->tile + s->curtileno;
1387 tp = tile->tile_part + tile->tp_idx;
1388 if (tp->tp_end < s->g.buffer) {
1389 av_log(s->avctx, AV_LOG_ERROR, "Invalid tpend\n");
1390 return AVERROR_INVALIDDATA;
1392 bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer);
1393 bytestream2_skip(&s->g, tp->tp_end - s->g.buffer);
1397 if (marker == JPEG2000_EOC)
1400 len = bytestream2_get_be16(&s->g);
1401 if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2)
1402 return AVERROR_INVALIDDATA;
1408 s->numXtiles = s->numYtiles = 0;
1411 ret = get_coc(s, codsty, properties);
1414 ret = get_cod(s, codsty, properties);
1417 ret = get_qcc(s, len, qntsty, properties);
1420 ret = get_qcd(s, len, qntsty, properties);
1423 if (!(ret = get_sot(s, len))) {
1424 av_assert1(s->curtileno >= 0);
1425 codsty = s->tile[s->curtileno].codsty;
1426 qntsty = s->tile[s->curtileno].qntsty;
1427 properties = s->tile[s->curtileno].properties;
1431 // the comment is ignored
1432 bytestream2_skip(&s->g, len - 2);
1435 // Tile-part lengths
1436 ret = get_tlm(s, len);
1439 av_log(s->avctx, AV_LOG_ERROR,
1440 "unsupported marker 0x%.4X at pos 0x%X\n",
1441 marker, bytestream2_tell(&s->g) - 4);
1442 bytestream2_skip(&s->g, len - 2);
1445 if (bytestream2_tell(&s->g) - oldpos != len || ret) {
1446 av_log(s->avctx, AV_LOG_ERROR,
1447 "error during processing marker segment %.4x\n", marker);
1448 return ret ? ret : -1;
1454 /* Read bit stream packets --> T2 operation. */
1455 static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1460 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1461 Jpeg2000Tile *tile = s->tile + tileno;
1463 if (ret = init_tile(s, tileno))
1466 s->g = tile->tile_part[0].tpg;
1467 if (ret = jpeg2000_decode_packets(s, tile))
1474 static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1476 uint32_t atom_size, atom, atom_end;
1477 int search_range = 10;
1481 bytestream2_get_bytes_left(&s->g) >= 8) {
1482 atom_size = bytestream2_get_be32u(&s->g);
1483 atom = bytestream2_get_be32u(&s->g);
1484 atom_end = bytestream2_tell(&s->g) + atom_size - 8;
1486 if (atom == JP2_CODESTREAM)
1489 if (bytestream2_get_bytes_left(&s->g) < atom_size || atom_end < atom_size)
1492 if (atom == JP2_HEADER &&
1494 uint32_t atom2_size, atom2, atom2_end;
1496 atom2_size = bytestream2_get_be32u(&s->g);
1497 atom2 = bytestream2_get_be32u(&s->g);
1498 atom2_end = bytestream2_tell(&s->g) + atom2_size - 8;
1499 if (atom2_size < 8 || atom2_end > atom_end || atom2_end < atom2_size)
1501 if (atom2 == JP2_CODESTREAM) {
1503 } else if (atom2 == MKBETAG('c','o','l','r') && atom2_size >= 7) {
1504 int method = bytestream2_get_byteu(&s->g);
1505 bytestream2_skipu(&s->g, 2);
1507 s->colour_space = bytestream2_get_be32u(&s->g);
1509 } else if (atom2 == MKBETAG('p','c','l','r') && atom2_size >= 6) {
1510 int i, size, colour_count, colour_channels, colour_depth[3];
1512 colour_count = bytestream2_get_be16u(&s->g);
1513 colour_channels = bytestream2_get_byteu(&s->g);
1514 // FIXME: Do not ignore channel_sign
1515 colour_depth[0] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1516 colour_depth[1] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1517 colour_depth[2] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1518 size = (colour_depth[0] + 7 >> 3) * colour_count +
1519 (colour_depth[1] + 7 >> 3) * colour_count +
1520 (colour_depth[2] + 7 >> 3) * colour_count;
1521 if (colour_count > 256 ||
1522 colour_channels != 3 ||
1523 colour_depth[0] > 16 ||
1524 colour_depth[1] > 16 ||
1525 colour_depth[2] > 16 ||
1526 atom2_size < size) {
1527 avpriv_request_sample(s->avctx, "Unknown palette");
1528 bytestream2_seek(&s->g, atom2_end, SEEK_SET);
1532 for (i = 0; i < colour_count; i++) {
1533 if (colour_depth[0] <= 8) {
1534 r = bytestream2_get_byteu(&s->g) << 8 - colour_depth[0];
1535 r |= r >> colour_depth[0];
1537 r = bytestream2_get_be16u(&s->g) >> colour_depth[0] - 8;
1539 if (colour_depth[1] <= 8) {
1540 g = bytestream2_get_byteu(&s->g) << 8 - colour_depth[1];
1541 r |= r >> colour_depth[1];
1543 g = bytestream2_get_be16u(&s->g) >> colour_depth[1] - 8;
1545 if (colour_depth[2] <= 8) {
1546 b = bytestream2_get_byteu(&s->g) << 8 - colour_depth[2];
1547 r |= r >> colour_depth[2];
1549 b = bytestream2_get_be16u(&s->g) >> colour_depth[2] - 8;
1551 s->palette[i] = 0xffu << 24 | r << 16 | g << 8 | b;
1553 } else if (atom2 == MKBETAG('c','d','e','f') && atom2_size >= 2) {
1554 int n = bytestream2_get_be16u(&s->g);
1556 int cn = bytestream2_get_be16(&s->g);
1557 int av_unused typ = bytestream2_get_be16(&s->g);
1558 int asoc = bytestream2_get_be16(&s->g);
1559 if (cn < 4 || asoc < 4)
1563 bytestream2_seek(&s->g, atom2_end, SEEK_SET);
1564 } while (atom_end - atom2_end >= 8);
1568 bytestream2_seek(&s->g, atom_end, SEEK_SET);
1574 static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1575 int *got_frame, AVPacket *avpkt)
1577 Jpeg2000DecoderContext *s = avctx->priv_data;
1578 ThreadFrame frame = { .f = data };
1579 AVFrame *picture = data;
1583 bytestream2_init(&s->g, avpkt->data, avpkt->size);
1585 memset(s->cdef, -1, sizeof(s->cdef));
1587 if (bytestream2_get_bytes_left(&s->g) < 2) {
1588 ret = AVERROR_INVALIDDATA;
1592 // check if the image is in jp2 format
1593 if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1594 (bytestream2_get_be32u(&s->g) == 12) &&
1595 (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1596 (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
1597 if (!jp2_find_codestream(s)) {
1598 av_log(avctx, AV_LOG_ERROR,
1599 "Could not find Jpeg2000 codestream atom.\n");
1600 ret = AVERROR_INVALIDDATA;
1604 bytestream2_seek(&s->g, 0, SEEK_SET);
1607 if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
1608 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1609 ret = AVERROR_INVALIDDATA;
1612 if (ret = jpeg2000_read_main_headers(s))
1615 /* get picture buffer */
1616 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1618 picture->pict_type = AV_PICTURE_TYPE_I;
1619 picture->key_frame = 1;
1621 if (ret = jpeg2000_read_bitstream_packets(s))
1624 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1625 if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
1628 jpeg2000_dec_cleanup(s);
1632 if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
1633 memcpy(picture->data[1], s->palette, 256 * sizeof(uint32_t));
1635 return bytestream2_tell(&s->g);
1638 jpeg2000_dec_cleanup(s);
1642 static void jpeg2000_init_static_data(AVCodec *codec)
1644 ff_jpeg2000_init_tier1_luts();
1645 ff_mqc_init_context_tables();
1648 #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1649 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1651 static const AVOption options[] = {
1652 { "lowres", "Lower the decoding resolution by a power of two",
1653 OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1657 static const AVProfile profiles[] = {
1658 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
1659 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
1660 { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
1661 { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
1662 { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
1663 { FF_PROFILE_UNKNOWN },
1666 static const AVClass jpeg2000_class = {
1667 .class_name = "jpeg2000",
1668 .item_name = av_default_item_name,
1670 .version = LIBAVUTIL_VERSION_INT,
1673 AVCodec ff_jpeg2000_decoder = {
1675 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1676 .type = AVMEDIA_TYPE_VIDEO,
1677 .id = AV_CODEC_ID_JPEG2000,
1678 .capabilities = CODEC_CAP_FRAME_THREADS,
1679 .priv_data_size = sizeof(Jpeg2000DecoderContext),
1680 .init_static_data = jpeg2000_init_static_data,
1681 .decode = jpeg2000_decode_frame,
1682 .priv_class = &jpeg2000_class,
1684 .profiles = NULL_IF_CONFIG_SMALL(profiles)