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 log2_chroma_wh |= s->cdy[i] >> 1 << i * 4 | s->cdx[i] >> 1 << i * 4 + 2;
279 s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
280 s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
282 if (s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(*s->tile)) {
283 s->numXtiles = s->numYtiles = 0;
284 return AVERROR(EINVAL);
287 s->tile = av_mallocz_array(s->numXtiles * s->numYtiles, sizeof(*s->tile));
289 s->numXtiles = s->numYtiles = 0;
290 return AVERROR(ENOMEM);
293 for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
294 Jpeg2000Tile *tile = s->tile + i;
296 tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
298 return AVERROR(ENOMEM);
301 /* compute image size with reduction factor */
302 s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x,
303 s->reduction_factor);
304 s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
305 s->reduction_factor);
307 if (s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_2K ||
308 s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_4K) {
309 possible_fmts = xyz_pix_fmts;
310 possible_fmts_nb = FF_ARRAY_ELEMS(xyz_pix_fmts);
312 switch (s->colour_space) {
314 possible_fmts = rgb_pix_fmts;
315 possible_fmts_nb = FF_ARRAY_ELEMS(rgb_pix_fmts);
318 possible_fmts = gray_pix_fmts;
319 possible_fmts_nb = FF_ARRAY_ELEMS(gray_pix_fmts);
322 possible_fmts = yuv_pix_fmts;
323 possible_fmts_nb = FF_ARRAY_ELEMS(yuv_pix_fmts);
326 possible_fmts = all_pix_fmts;
327 possible_fmts_nb = FF_ARRAY_ELEMS(all_pix_fmts);
331 for (i = 0; i < possible_fmts_nb; ++i) {
332 if (pix_fmt_match(possible_fmts[i], ncomponents, s->precision, log2_chroma_wh, s->pal8)) {
333 s->avctx->pix_fmt = possible_fmts[i];
337 if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
338 av_log(s->avctx, AV_LOG_ERROR,
339 "Unknown pix_fmt, profile: %d, colour_space: %d, "
340 "components: %d, precision: %d, "
341 "cdx[1]: %d, cdy[1]: %d, cdx[2]: %d, cdy[2]: %d\n",
342 s->avctx->profile, s->colour_space, ncomponents, s->precision,
343 ncomponents > 2 ? s->cdx[1] : 0,
344 ncomponents > 2 ? s->cdy[1] : 0,
345 ncomponents > 2 ? s->cdx[2] : 0,
346 ncomponents > 2 ? s->cdy[2] : 0);
351 /* get common part for COD and COC segments */
352 static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
356 if (bytestream2_get_bytes_left(&s->g) < 5)
357 return AVERROR_INVALIDDATA;
359 /* nreslevels = number of resolution levels
360 = number of decomposition level +1 */
361 c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
362 if (c->nreslevels >= JPEG2000_MAX_RESLEVELS) {
363 av_log(s->avctx, AV_LOG_ERROR, "nreslevels %d is invalid\n", c->nreslevels);
364 return AVERROR_INVALIDDATA;
367 /* compute number of resolution levels to decode */
368 if (c->nreslevels < s->reduction_factor)
369 c->nreslevels2decode = 1;
371 c->nreslevels2decode = c->nreslevels - s->reduction_factor;
373 c->log2_cblk_width = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk width
374 c->log2_cblk_height = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk height
376 if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
377 c->log2_cblk_width + c->log2_cblk_height > 12) {
378 av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
379 return AVERROR_INVALIDDATA;
382 c->cblk_style = bytestream2_get_byteu(&s->g);
383 if (c->cblk_style != 0) { // cblk style
384 av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
386 c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
387 /* set integer 9/7 DWT in case of BITEXACT flag */
388 if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
389 c->transform = FF_DWT97_INT;
391 if (c->csty & JPEG2000_CSTY_PREC) {
393 for (i = 0; i < c->nreslevels; i++) {
394 byte = bytestream2_get_byte(&s->g);
395 c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
396 c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
399 memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
400 memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
405 /* get coding parameters for a particular tile or whole image*/
406 static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
409 Jpeg2000CodingStyle tmp;
412 if (bytestream2_get_bytes_left(&s->g) < 5)
413 return AVERROR_INVALIDDATA;
415 tmp.csty = bytestream2_get_byteu(&s->g);
417 // get progression order
418 tmp.prog_order = bytestream2_get_byteu(&s->g);
420 tmp.nlayers = bytestream2_get_be16u(&s->g);
421 tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
423 if (tmp.mct && s->ncomponents < 3) {
424 av_log(s->avctx, AV_LOG_ERROR,
425 "MCT %d with too few components (%d)\n",
426 tmp.mct, s->ncomponents);
427 return AVERROR_INVALIDDATA;
430 if ((ret = get_cox(s, &tmp)) < 0)
433 for (compno = 0; compno < s->ncomponents; compno++)
434 if (!(properties[compno] & HAD_COC))
435 memcpy(c + compno, &tmp, sizeof(tmp));
439 /* Get coding parameters for a component in the whole image or a
440 * particular tile. */
441 static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
446 if (bytestream2_get_bytes_left(&s->g) < 2)
447 return AVERROR_INVALIDDATA;
449 compno = bytestream2_get_byteu(&s->g);
451 if (compno >= s->ncomponents) {
452 av_log(s->avctx, AV_LOG_ERROR,
453 "Invalid compno %d. There are %d components in the image.\n",
454 compno, s->ncomponents);
455 return AVERROR_INVALIDDATA;
459 c->csty = bytestream2_get_byteu(&s->g);
461 if ((ret = get_cox(s, c)) < 0)
464 properties[compno] |= HAD_COC;
468 /* Get common part for QCD and QCC segments. */
469 static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
473 if (bytestream2_get_bytes_left(&s->g) < 1)
474 return AVERROR_INVALIDDATA;
476 x = bytestream2_get_byteu(&s->g); // Sqcd
478 q->nguardbits = x >> 5;
479 q->quantsty = x & 0x1f;
481 if (q->quantsty == JPEG2000_QSTY_NONE) {
483 if (bytestream2_get_bytes_left(&s->g) < n ||
484 n > JPEG2000_MAX_DECLEVELS*3)
485 return AVERROR_INVALIDDATA;
486 for (i = 0; i < n; i++)
487 q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
488 } else if (q->quantsty == JPEG2000_QSTY_SI) {
489 if (bytestream2_get_bytes_left(&s->g) < 2)
490 return AVERROR_INVALIDDATA;
491 x = bytestream2_get_be16u(&s->g);
492 q->expn[0] = x >> 11;
493 q->mant[0] = x & 0x7ff;
494 for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
495 int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
496 q->expn[i] = curexpn;
497 q->mant[i] = q->mant[0];
501 if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
502 n > JPEG2000_MAX_DECLEVELS*3)
503 return AVERROR_INVALIDDATA;
504 for (i = 0; i < n; i++) {
505 x = bytestream2_get_be16u(&s->g);
506 q->expn[i] = x >> 11;
507 q->mant[i] = x & 0x7ff;
513 /* Get quantization parameters for a particular tile or a whole image. */
514 static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
517 Jpeg2000QuantStyle tmp;
520 if ((ret = get_qcx(s, n, &tmp)) < 0)
522 for (compno = 0; compno < s->ncomponents; compno++)
523 if (!(properties[compno] & HAD_QCC))
524 memcpy(q + compno, &tmp, sizeof(tmp));
528 /* Get quantization parameters for a component in the whole image
529 * on in a particular tile. */
530 static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
535 if (bytestream2_get_bytes_left(&s->g) < 1)
536 return AVERROR_INVALIDDATA;
538 compno = bytestream2_get_byteu(&s->g);
540 if (compno >= s->ncomponents) {
541 av_log(s->avctx, AV_LOG_ERROR,
542 "Invalid compno %d. There are %d components in the image.\n",
543 compno, s->ncomponents);
544 return AVERROR_INVALIDDATA;
547 properties[compno] |= HAD_QCC;
548 return get_qcx(s, n - 1, q + compno);
551 /* Get start of tile segment. */
552 static int get_sot(Jpeg2000DecoderContext *s, int n)
554 Jpeg2000TilePart *tp;
559 if (bytestream2_get_bytes_left(&s->g) < 8)
560 return AVERROR_INVALIDDATA;
563 Isot = bytestream2_get_be16u(&s->g); // Isot
564 if (Isot >= s->numXtiles * s->numYtiles)
565 return AVERROR_INVALIDDATA;
568 Psot = bytestream2_get_be32u(&s->g); // Psot
569 TPsot = bytestream2_get_byteu(&s->g); // TPsot
571 /* Read TNSot but not used */
572 bytestream2_get_byteu(&s->g); // TNsot
574 if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
575 av_log(s->avctx, AV_LOG_ERROR, "Psot %d too big\n", Psot);
576 return AVERROR_INVALIDDATA;
579 if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) {
580 avpriv_request_sample(s->avctx, "Support for %d components", TPsot);
581 return AVERROR_PATCHWELCOME;
584 s->tile[Isot].tp_idx = TPsot;
585 tp = s->tile[Isot].tile_part + TPsot;
586 tp->tile_index = Isot;
587 tp->tp_end = s->g.buffer + Psot - n - 2;
590 Jpeg2000Tile *tile = s->tile + s->curtileno;
593 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));
594 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));
600 /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
601 * Used to know the number of tile parts and lengths.
602 * There may be multiple TLMs in the header.
603 * TODO: The function is not used for tile-parts management, nor anywhere else.
604 * It can be useful to allocate memory for tile parts, before managing the SOT
605 * markers. Parsing the TLM header is needed to increment the input header
607 * This marker is mandatory for DCI. */
608 static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
610 uint8_t Stlm, ST, SP, tile_tlm, i;
611 bytestream2_get_byte(&s->g); /* Ztlm: skipped */
612 Stlm = bytestream2_get_byte(&s->g);
614 // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
615 ST = (Stlm >> 4) & 0x03;
616 // TODO: Manage case of ST = 0b11 --> raise error
617 SP = (Stlm >> 6) & 0x01;
618 tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
619 for (i = 0; i < tile_tlm; i++) {
624 bytestream2_get_byte(&s->g);
627 bytestream2_get_be16(&s->g);
630 bytestream2_get_be32(&s->g);
634 bytestream2_get_be16(&s->g);
636 bytestream2_get_be32(&s->g);
642 static int init_tile(Jpeg2000DecoderContext *s, int tileno)
645 int tilex = tileno % s->numXtiles;
646 int tiley = tileno / s->numXtiles;
647 Jpeg2000Tile *tile = s->tile + tileno;
650 return AVERROR(ENOMEM);
652 for (compno = 0; compno < s->ncomponents; compno++) {
653 Jpeg2000Component *comp = tile->comp + compno;
654 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
655 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
656 int ret; // global bandno
658 comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
659 comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
660 comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
661 comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
663 comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
664 comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
665 comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
666 comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
668 if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
669 s->cbps[compno], s->cdx[compno],
670 s->cdy[compno], s->avctx))
676 /* Read the number of coding passes. */
677 static int getnpasses(Jpeg2000DecoderContext *s)
684 if ((num = get_bits(s, 2)) != 3)
685 return num < 0 ? num : 3 + num;
686 if ((num = get_bits(s, 5)) != 31)
687 return num < 0 ? num : 6 + num;
688 num = get_bits(s, 7);
689 return num < 0 ? num : 37 + num;
692 static int getlblockinc(Jpeg2000DecoderContext *s)
695 while (ret = get_bits(s, 1)) {
703 static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
704 Jpeg2000CodingStyle *codsty,
705 Jpeg2000ResLevel *rlevel, int precno,
706 int layno, uint8_t *expn, int numgbits)
708 int bandno, cblkno, ret, nb_code_blocks;
710 if (!(ret = get_bits(s, 1))) {
716 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
717 Jpeg2000Band *band = rlevel->band + bandno;
718 Jpeg2000Prec *prec = band->prec + precno;
720 if (band->coord[0][0] == band->coord[0][1] ||
721 band->coord[1][0] == band->coord[1][1])
723 nb_code_blocks = prec->nb_codeblocks_height *
724 prec->nb_codeblocks_width;
725 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
726 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
727 int incl, newpasses, llen;
730 incl = get_bits(s, 1);
732 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
738 if (!cblk->npasses) {
739 int v = expn[bandno] + numgbits - 1 -
740 tag_tree_decode(s, prec->zerobits + cblkno, 100);
742 av_log(s->avctx, AV_LOG_ERROR,
743 "nonzerobits %d invalid\n", v);
744 return AVERROR_INVALIDDATA;
746 cblk->nonzerobits = v;
748 if ((newpasses = getnpasses(s)) < 0)
750 if ((llen = getlblockinc(s)) < 0)
752 cblk->lblock += llen;
753 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
755 if (ret > sizeof(cblk->data)) {
756 avpriv_request_sample(s->avctx,
757 "Block with lengthinc greater than %zu",
759 return AVERROR_PATCHWELCOME;
761 cblk->lengthinc = ret;
762 cblk->npasses += newpasses;
767 if (codsty->csty & JPEG2000_CSTY_EPH) {
768 if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
769 bytestream2_skip(&s->g, 2);
771 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
774 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
775 Jpeg2000Band *band = rlevel->band + bandno;
776 Jpeg2000Prec *prec = band->prec + precno;
778 nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
779 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
780 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
781 if ( bytestream2_get_bytes_left(&s->g) < cblk->lengthinc
782 || sizeof(cblk->data) < cblk->length + cblk->lengthinc + 2
784 return AVERROR_INVALIDDATA;
786 bytestream2_get_bufferu(&s->g, cblk->data + cblk->length, cblk->lengthinc);
787 cblk->length += cblk->lengthinc;
794 static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
797 int layno, reslevelno, compno, precno, ok_reslevel;
801 switch (tile->codsty[0].prog_order) {
802 case JPEG2000_PGOD_RLCP:
803 avpriv_request_sample(s->avctx, "Progression order RLCP");
805 case JPEG2000_PGOD_LRCP:
806 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
808 for (reslevelno = 0; ok_reslevel; reslevelno++) {
810 for (compno = 0; compno < s->ncomponents; compno++) {
811 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
812 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
813 if (reslevelno < codsty->nreslevels) {
814 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
817 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
818 if ((ret = jpeg2000_decode_packet(s,
821 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
822 qntsty->nguardbits)) < 0)
830 case JPEG2000_PGOD_CPRL:
831 for (compno = 0; compno < s->ncomponents; compno++) {
832 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
833 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
835 /* Set bit stream buffer address according to tile-part.
836 * For DCinema one tile-part per component, so can be
837 * indexed by component. */
838 s->g = tile->tile_part[compno].tpg;
840 /* Position loop (y axis)
841 * TODO: Automate computing of step 256.
842 * Fixed here, but to be computed before entering here. */
843 for (y = 0; y < s->height; y += 256) {
844 /* Position loop (y axis)
845 * TODO: automate computing of step 256.
846 * Fixed here, but to be computed before entering here. */
847 for (x = 0; x < s->width; x += 256) {
848 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
850 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
851 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
853 if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
854 (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
857 if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
858 (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
861 // check if a precinct exists
862 prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
863 prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
864 precno = prcx + rlevel->num_precincts_x * prcy;
865 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
866 if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
868 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
869 qntsty->nguardbits)) < 0)
878 case JPEG2000_PGOD_RPCL:
879 avpriv_request_sample(s->avctx, "Progression order RPCL");
880 ret = AVERROR_PATCHWELCOME;
883 case JPEG2000_PGOD_PCRL:
884 avpriv_request_sample(s->avctx, "Progression order PCRL");
885 ret = AVERROR_PATCHWELCOME;
892 /* EOC marker reached */
893 bytestream2_skip(&s->g, 2);
898 /* TIER-1 routines */
899 static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
900 int bpno, int bandno, int bpass_csty_symbol,
901 int vert_causal_ctx_csty_symbol)
903 int mask = 3 << (bpno - 1), y0, x, y;
905 for (y0 = 0; y0 < height; y0 += 4)
906 for (x = 0; x < width; x++)
907 for (y = y0; y < height && y < y0 + 4; y++) {
908 if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
909 && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
911 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
912 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
913 if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {
914 int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
915 if (bpass_csty_symbol)
916 t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
918 t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
921 ff_jpeg2000_set_significance(t1, x, y,
924 t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
929 static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
935 phalf = 1 << (bpno - 1);
938 for (y0 = 0; y0 < height; y0 += 4)
939 for (x = 0; x < width; x++)
940 for (y = y0; y < height && y < y0 + 4; y++)
941 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
942 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
943 int r = ff_mqc_decode(&t1->mqc,
944 t1->mqc.cx_states + ctxno)
946 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
947 t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
951 static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
952 int width, int height, int bpno, int bandno,
953 int seg_symbols, int vert_causal_ctx_csty_symbol)
955 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
957 for (y0 = 0; y0 < height; y0 += 4) {
958 for (x = 0; x < width; x++) {
959 if (y0 + 3 < height &&
960 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
961 (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
962 (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
963 (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
964 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
966 runlen = ff_mqc_decode(&t1->mqc,
967 t1->mqc.cx_states + MQC_CX_UNI);
968 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
977 for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
979 if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
981 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
982 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
983 dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,
989 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
991 t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
992 t1->mqc.cx_states + ctxno) ^
995 ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
998 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
1004 val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1005 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1006 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1007 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1009 av_log(s->avctx, AV_LOG_ERROR,
1010 "Segmentation symbol value incorrect\n");
1014 static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
1015 Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
1016 int width, int height, int bandpos)
1018 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
1019 int clnpass_cnt = 0;
1020 int bpass_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_BYPASS;
1021 int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC;
1023 for (y = 0; y < height; y++)
1024 memset(t1->data[y], 0, width * sizeof(**t1->data));
1026 /* If code-block contains no compressed data: nothing to do. */
1030 for (y = 0; y < height + 2; y++)
1031 memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags));
1033 cblk->data[cblk->length] = 0xff;
1034 cblk->data[cblk->length+1] = 0xff;
1035 ff_mqc_initdec(&t1->mqc, cblk->data);
1040 decode_sigpass(t1, width, height, bpno + 1, bandpos,
1041 bpass_csty_symbol && (clnpass_cnt >= 4),
1042 vert_causal_ctx_csty_symbol);
1045 decode_refpass(t1, width, height, bpno + 1);
1046 if (bpass_csty_symbol && clnpass_cnt >= 4)
1047 ff_mqc_initdec(&t1->mqc, cblk->data);
1050 decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
1051 codsty->cblk_style & JPEG2000_CBLK_SEGSYM,
1052 vert_causal_ctx_csty_symbol);
1053 clnpass_cnt = clnpass_cnt + 1;
1054 if (bpass_csty_symbol && clnpass_cnt >= 4)
1055 ff_mqc_initdec(&t1->mqc, cblk->data);
1068 /* TODO: Verify dequantization for lossless case
1069 * comp->data can be float or int
1070 * band->stepsize can be float or int
1071 * depending on the type of DWT transformation.
1072 * see ISO/IEC 15444-1:2002 A.6.1 */
1074 /* Float dequantization of a codeblock.*/
1075 static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
1076 Jpeg2000Component *comp,
1077 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1080 int w = cblk->coord[0][1] - cblk->coord[0][0];
1081 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1082 float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1083 int *src = t1->data[j];
1084 for (i = 0; i < w; ++i)
1085 datap[i] = src[i] * band->f_stepsize;
1089 /* Integer dequantization of a codeblock.*/
1090 static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
1091 Jpeg2000Component *comp,
1092 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1095 int w = cblk->coord[0][1] - cblk->coord[0][0];
1096 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1097 int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1098 int *src = t1->data[j];
1099 for (i = 0; i < w; ++i)
1100 datap[i] = (src[i] * band->i_stepsize + (1 << 14)) >> 15;
1104 /* Inverse ICT parameters in float and integer.
1105 * int value = (float value) * (1<<16) */
1106 static const float f_ict_params[4] = {
1112 static const int i_ict_params[4] = {
1119 static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
1122 int32_t *src[3], i0, i1, i2;
1123 float *srcf[3], i0f, i1f, i2f;
1125 for (i = 0; i < 3; i++)
1126 if (tile->codsty[0].transform == FF_DWT97)
1127 srcf[i] = tile->comp[i].f_data;
1129 src [i] = tile->comp[i].i_data;
1131 for (i = 0; i < 2; i++)
1132 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
1134 switch (tile->codsty[0].transform) {
1136 for (i = 0; i < csize; i++) {
1137 i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
1138 i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
1139 - (f_ict_params[2] * *srcf[2]);
1140 i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
1147 for (i = 0; i < csize; i++) {
1148 i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
1149 i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
1150 - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
1151 i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
1158 for (i = 0; i < csize; i++) {
1159 i1 = *src[0] - (*src[2] + *src[1] >> 2);
1170 static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1173 int compno, reslevelno, bandno;
1177 Jpeg2000T1Context t1;
1179 /* Loop on tile components */
1180 for (compno = 0; compno < s->ncomponents; compno++) {
1181 Jpeg2000Component *comp = tile->comp + compno;
1182 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1184 /* Loop on resolution levels */
1185 for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1186 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1188 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1189 int nb_precincts, precno;
1190 Jpeg2000Band *band = rlevel->band + bandno;
1191 int cblkno = 0, bandpos;
1193 bandpos = bandno + (reslevelno > 0);
1195 if (band->coord[0][0] == band->coord[0][1] ||
1196 band->coord[1][0] == band->coord[1][1])
1199 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1200 /* Loop on precincts */
1201 for (precno = 0; precno < nb_precincts; precno++) {
1202 Jpeg2000Prec *prec = band->prec + precno;
1204 /* Loop on codeblocks */
1205 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1207 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1208 decode_cblk(s, codsty, &t1, cblk,
1209 cblk->coord[0][1] - cblk->coord[0][0],
1210 cblk->coord[1][1] - cblk->coord[1][0],
1213 x = cblk->coord[0][0];
1214 y = cblk->coord[1][0];
1216 if (codsty->transform == FF_DWT97)
1217 dequantization_float(x, y, cblk, comp, &t1, band);
1219 dequantization_int(x, y, cblk, comp, &t1, band);
1223 } /* end reslevel */
1226 ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data);
1229 /* inverse MCT transformation */
1230 if (tile->codsty[0].mct)
1231 mct_decode(s, tile);
1233 if (s->cdef[0] < 0) {
1234 for (x = 0; x < s->ncomponents; x++)
1236 if ((s->ncomponents & 1) == 0)
1237 s->cdef[s->ncomponents-1] = 0;
1240 if (s->precision <= 8) {
1241 for (compno = 0; compno < s->ncomponents; compno++) {
1242 Jpeg2000Component *comp = tile->comp + compno;
1243 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1244 float *datap = comp->f_data;
1245 int32_t *i_datap = comp->i_data;
1246 int cbps = s->cbps[compno];
1247 int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1248 int planar = !!picture->data[2];
1249 int pixelsize = planar ? 1 : s->ncomponents;
1253 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1256 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1257 line = picture->data[plane] + y * picture->linesize[plane];
1258 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1261 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1262 dst = line + x * pixelsize + compno*!planar;
1264 if (codsty->transform == FF_DWT97) {
1265 for (; x < w; x += s->cdx[compno]) {
1266 int val = lrintf(*datap) + (1 << (cbps - 1));
1267 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1268 val = av_clip(val, 0, (1 << cbps) - 1);
1269 *dst = val << (8 - cbps);
1274 for (; x < w; x += s->cdx[compno]) {
1275 int val = *i_datap + (1 << (cbps - 1));
1276 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1277 val = av_clip(val, 0, (1 << cbps) - 1);
1278 *dst = val << (8 - cbps);
1283 line += picture->linesize[plane];
1287 for (compno = 0; compno < s->ncomponents; compno++) {
1288 Jpeg2000Component *comp = tile->comp + compno;
1289 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1290 float *datap = comp->f_data;
1291 int32_t *i_datap = comp->i_data;
1293 int cbps = s->cbps[compno];
1294 int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1295 int planar = !!picture->data[2];
1296 int pixelsize = planar ? 1 : s->ncomponents;
1300 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1302 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1303 linel = (uint16_t *)picture->data[plane] + y * (picture->linesize[plane] >> 1);
1304 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1307 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1308 dst = linel + (x * pixelsize + compno*!planar);
1309 if (codsty->transform == FF_DWT97) {
1310 for (; x < w; x += s-> cdx[compno]) {
1311 int val = lrintf(*datap) + (1 << (cbps - 1));
1312 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1313 val = av_clip(val, 0, (1 << cbps) - 1);
1314 /* align 12 bit values in little-endian mode */
1315 *dst = val << (16 - cbps);
1320 for (; x < w; x += s-> cdx[compno]) {
1321 int val = *i_datap + (1 << (cbps - 1));
1322 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1323 val = av_clip(val, 0, (1 << cbps) - 1);
1324 /* align 12 bit values in little-endian mode */
1325 *dst = val << (16 - cbps);
1330 linel += picture->linesize[plane] >> 1;
1338 static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1341 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1342 for (compno = 0; compno < s->ncomponents; compno++) {
1343 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1344 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1346 ff_jpeg2000_cleanup(comp, codsty);
1348 av_freep(&s->tile[tileno].comp);
1351 s->numXtiles = s->numYtiles = 0;
1354 static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1356 Jpeg2000CodingStyle *codsty = s->codsty;
1357 Jpeg2000QuantStyle *qntsty = s->qntsty;
1358 uint8_t *properties = s->properties;
1365 if (bytestream2_get_bytes_left(&s->g) < 2) {
1366 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1370 marker = bytestream2_get_be16u(&s->g);
1371 oldpos = bytestream2_tell(&s->g);
1373 if (marker == JPEG2000_SOD) {
1375 Jpeg2000TilePart *tp;
1377 if (s->curtileno < 0) {
1378 av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n");
1379 return AVERROR_INVALIDDATA;
1382 tile = s->tile + s->curtileno;
1383 tp = tile->tile_part + tile->tp_idx;
1384 if (tp->tp_end < s->g.buffer) {
1385 av_log(s->avctx, AV_LOG_ERROR, "Invalid tpend\n");
1386 return AVERROR_INVALIDDATA;
1388 bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer);
1389 bytestream2_skip(&s->g, tp->tp_end - s->g.buffer);
1393 if (marker == JPEG2000_EOC)
1396 len = bytestream2_get_be16(&s->g);
1397 if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2)
1398 return AVERROR_INVALIDDATA;
1404 s->numXtiles = s->numYtiles = 0;
1407 ret = get_coc(s, codsty, properties);
1410 ret = get_cod(s, codsty, properties);
1413 ret = get_qcc(s, len, qntsty, properties);
1416 ret = get_qcd(s, len, qntsty, properties);
1419 if (!(ret = get_sot(s, len))) {
1420 av_assert1(s->curtileno >= 0);
1421 codsty = s->tile[s->curtileno].codsty;
1422 qntsty = s->tile[s->curtileno].qntsty;
1423 properties = s->tile[s->curtileno].properties;
1427 // the comment is ignored
1428 bytestream2_skip(&s->g, len - 2);
1431 // Tile-part lengths
1432 ret = get_tlm(s, len);
1435 av_log(s->avctx, AV_LOG_ERROR,
1436 "unsupported marker 0x%.4X at pos 0x%X\n",
1437 marker, bytestream2_tell(&s->g) - 4);
1438 bytestream2_skip(&s->g, len - 2);
1441 if (bytestream2_tell(&s->g) - oldpos != len || ret) {
1442 av_log(s->avctx, AV_LOG_ERROR,
1443 "error during processing marker segment %.4x\n", marker);
1444 return ret ? ret : -1;
1450 /* Read bit stream packets --> T2 operation. */
1451 static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1456 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1457 Jpeg2000Tile *tile = s->tile + tileno;
1459 if (ret = init_tile(s, tileno))
1462 s->g = tile->tile_part[0].tpg;
1463 if (ret = jpeg2000_decode_packets(s, tile))
1470 static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1472 uint32_t atom_size, atom;
1473 int found_codestream = 0, search_range = 10;
1475 while (!found_codestream && search_range
1477 bytestream2_get_bytes_left(&s->g) >= 8) {
1478 atom_size = bytestream2_get_be32u(&s->g);
1479 atom = bytestream2_get_be32u(&s->g);
1480 if (atom == JP2_CODESTREAM) {
1481 found_codestream = 1;
1482 } else if (atom == JP2_HEADER &&
1483 bytestream2_get_bytes_left(&s->g) >= atom_size &&
1485 uint32_t atom2_size, atom2;
1488 atom2_size = bytestream2_get_be32u(&s->g);
1489 atom2 = bytestream2_get_be32u(&s->g);
1491 if (atom2_size < 8 || atom2_size - 8 > atom_size)
1494 if (atom2 == JP2_CODESTREAM) {
1496 } else if (atom2 == MKBETAG('c','o','l','r') && atom2_size >= 7) {
1497 int method = bytestream2_get_byteu(&s->g);
1498 bytestream2_skipu(&s->g, 2);
1502 s->colour_space = bytestream2_get_be32u(&s->g);
1506 bytestream2_skipu(&s->g, atom2_size);
1507 atom_size -= atom2_size;
1508 } else if (atom2 == MKBETAG('p','c','l','r') && atom2_size >= 6) {
1509 int i, size, colour_count, colour_channels, colour_depth[3];
1511 colour_count = bytestream2_get_be16u(&s->g);
1512 colour_channels = bytestream2_get_byteu(&s->g);
1513 // FIXME: Do not ignore channel_sign
1514 colour_depth[0] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1515 colour_depth[1] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1516 colour_depth[2] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1519 size = (colour_depth[0] + 7 >> 3) * colour_count +
1520 (colour_depth[1] + 7 >> 3) * colour_count +
1521 (colour_depth[2] + 7 >> 3) * colour_count;
1522 if (colour_count > 256 ||
1523 colour_channels != 3 ||
1524 colour_depth[0] > 16 ||
1525 colour_depth[1] > 16 ||
1526 colour_depth[2] > 16 ||
1527 atom2_size < size) {
1528 avpriv_request_sample(s->avctx, "Unknown palette");
1529 bytestream2_skipu(&s->g, atom2_size);
1530 atom_size -= atom2_size;
1534 for (i = 0; i < colour_count; i++) {
1535 if (colour_depth[0] <= 8) {
1536 r = bytestream2_get_byteu(&s->g) << 8 - colour_depth[0];
1537 r |= r >> colour_depth[0];
1539 r = bytestream2_get_be16u(&s->g) >> colour_depth[0] - 8;
1541 if (colour_depth[1] <= 8) {
1542 g = bytestream2_get_byteu(&s->g) << 8 - colour_depth[1];
1543 r |= r >> colour_depth[1];
1545 g = bytestream2_get_be16u(&s->g) >> colour_depth[1] - 8;
1547 if (colour_depth[2] <= 8) {
1548 b = bytestream2_get_byteu(&s->g) << 8 - colour_depth[2];
1549 r |= r >> colour_depth[2];
1551 b = bytestream2_get_be16u(&s->g) >> colour_depth[2] - 8;
1553 s->palette[i] = 0xffu << 24 | r << 16 | g << 8 | b;
1557 bytestream2_skipu(&s->g, atom2_size);
1558 atom_size -= atom2_size;
1559 } else if (atom2 == MKBETAG('c','d','e','f') && atom2_size >= 2 &&
1560 bytestream2_get_bytes_left(&s->g) >= atom2_size) {
1561 int n = bytestream2_get_be16u(&s->g);
1565 int cn = bytestream2_get_be16(&s->g);
1566 int av_unused typ = bytestream2_get_be16(&s->g);
1567 int asoc = bytestream2_get_be16(&s->g);
1568 if (cn < 4 || asoc < 4)
1573 bytestream2_skipu(&s->g, atom2_size);
1575 bytestream2_skipu(&s->g, atom2_size);
1576 atom_size -= atom2_size;
1578 } while (atom_size >= 8);
1579 bytestream2_skipu(&s->g, atom_size);
1581 if (bytestream2_get_bytes_left(&s->g) < atom_size - 8)
1583 bytestream2_skipu(&s->g, atom_size - 8);
1588 if (found_codestream)
1593 static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1594 int *got_frame, AVPacket *avpkt)
1596 Jpeg2000DecoderContext *s = avctx->priv_data;
1597 ThreadFrame frame = { .f = data };
1598 AVFrame *picture = data;
1602 bytestream2_init(&s->g, avpkt->data, avpkt->size);
1604 memset(s->cdef, -1, sizeof(s->cdef));
1606 if (bytestream2_get_bytes_left(&s->g) < 2) {
1607 ret = AVERROR_INVALIDDATA;
1611 // check if the image is in jp2 format
1612 if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1613 (bytestream2_get_be32u(&s->g) == 12) &&
1614 (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1615 (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
1616 if (!jp2_find_codestream(s)) {
1617 av_log(avctx, AV_LOG_ERROR,
1618 "Could not find Jpeg2000 codestream atom.\n");
1619 ret = AVERROR_INVALIDDATA;
1623 bytestream2_seek(&s->g, 0, SEEK_SET);
1626 if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
1627 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1628 ret = AVERROR_INVALIDDATA;
1631 if (ret = jpeg2000_read_main_headers(s))
1634 /* get picture buffer */
1635 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1637 picture->pict_type = AV_PICTURE_TYPE_I;
1638 picture->key_frame = 1;
1640 if (ret = jpeg2000_read_bitstream_packets(s))
1643 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1644 if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
1647 jpeg2000_dec_cleanup(s);
1651 if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
1652 memcpy(picture->data[1], s->palette, 256 * sizeof(uint32_t));
1654 return bytestream2_tell(&s->g);
1657 jpeg2000_dec_cleanup(s);
1661 static void jpeg2000_init_static_data(AVCodec *codec)
1663 ff_jpeg2000_init_tier1_luts();
1664 ff_mqc_init_context_tables();
1667 #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1668 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1670 static const AVOption options[] = {
1671 { "lowres", "Lower the decoding resolution by a power of two",
1672 OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1676 static const AVProfile profiles[] = {
1677 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
1678 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
1679 { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
1680 { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
1681 { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
1682 { FF_PROFILE_UNKNOWN },
1685 static const AVClass jpeg2000_class = {
1686 .class_name = "jpeg2000",
1687 .item_name = av_default_item_name,
1689 .version = LIBAVUTIL_VERSION_INT,
1692 AVCodec ff_jpeg2000_decoder = {
1694 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1695 .type = AVMEDIA_TYPE_VIDEO,
1696 .id = AV_CODEC_ID_JPEG2000,
1697 .capabilities = CODEC_CAP_FRAME_THREADS,
1698 .priv_data_size = sizeof(Jpeg2000DecoderContext),
1699 .init_static_data = jpeg2000_init_static_data,
1700 .decode = jpeg2000_decode_frame,
1701 .priv_class = &jpeg2000_class,
1703 .profiles = NULL_IF_CONFIG_SMALL(profiles)