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->cdx[i] == 3 || s->cdx[i] > 4
277 || !s->cdy[i] || s->cdy[i] == 3 || s->cdy[i] > 4) {
278 av_log(s->avctx, AV_LOG_ERROR, "Invalid sample seperation\n");
279 return AVERROR_INVALIDDATA;
281 log2_chroma_wh |= s->cdy[i] >> 1 << i * 4 | s->cdx[i] >> 1 << i * 4 + 2;
284 s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
285 s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
287 if (s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(*s->tile)) {
288 s->numXtiles = s->numYtiles = 0;
289 return AVERROR(EINVAL);
292 s->tile = av_mallocz_array(s->numXtiles * s->numYtiles, sizeof(*s->tile));
294 s->numXtiles = s->numYtiles = 0;
295 return AVERROR(ENOMEM);
298 for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
299 Jpeg2000Tile *tile = s->tile + i;
301 tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
303 return AVERROR(ENOMEM);
306 /* compute image size with reduction factor */
307 s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x,
308 s->reduction_factor);
309 s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
310 s->reduction_factor);
312 if (s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_2K ||
313 s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_4K) {
314 possible_fmts = xyz_pix_fmts;
315 possible_fmts_nb = FF_ARRAY_ELEMS(xyz_pix_fmts);
317 switch (s->colour_space) {
319 possible_fmts = rgb_pix_fmts;
320 possible_fmts_nb = FF_ARRAY_ELEMS(rgb_pix_fmts);
323 possible_fmts = gray_pix_fmts;
324 possible_fmts_nb = FF_ARRAY_ELEMS(gray_pix_fmts);
327 possible_fmts = yuv_pix_fmts;
328 possible_fmts_nb = FF_ARRAY_ELEMS(yuv_pix_fmts);
331 possible_fmts = all_pix_fmts;
332 possible_fmts_nb = FF_ARRAY_ELEMS(all_pix_fmts);
336 for (i = 0; i < possible_fmts_nb; ++i) {
337 if (pix_fmt_match(possible_fmts[i], ncomponents, s->precision, log2_chroma_wh, s->pal8)) {
338 s->avctx->pix_fmt = possible_fmts[i];
342 if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
343 av_log(s->avctx, AV_LOG_ERROR,
344 "Unknown pix_fmt, profile: %d, colour_space: %d, "
345 "components: %d, precision: %d, "
346 "cdx[1]: %d, cdy[1]: %d, cdx[2]: %d, cdy[2]: %d\n",
347 s->avctx->profile, s->colour_space, ncomponents, s->precision,
348 ncomponents > 2 ? s->cdx[1] : 0,
349 ncomponents > 2 ? s->cdy[1] : 0,
350 ncomponents > 2 ? s->cdx[2] : 0,
351 ncomponents > 2 ? s->cdy[2] : 0);
356 /* get common part for COD and COC segments */
357 static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
361 if (bytestream2_get_bytes_left(&s->g) < 5)
362 return AVERROR_INVALIDDATA;
364 /* nreslevels = number of resolution levels
365 = number of decomposition level +1 */
366 c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
367 if (c->nreslevels >= JPEG2000_MAX_RESLEVELS) {
368 av_log(s->avctx, AV_LOG_ERROR, "nreslevels %d is invalid\n", c->nreslevels);
369 return AVERROR_INVALIDDATA;
372 /* compute number of resolution levels to decode */
373 if (c->nreslevels < s->reduction_factor)
374 c->nreslevels2decode = 1;
376 c->nreslevels2decode = c->nreslevels - s->reduction_factor;
378 c->log2_cblk_width = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk width
379 c->log2_cblk_height = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk height
381 if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
382 c->log2_cblk_width + c->log2_cblk_height > 12) {
383 av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
384 return AVERROR_INVALIDDATA;
387 if (c->log2_cblk_width > 6 || c->log2_cblk_height > 6) {
388 avpriv_request_sample(s->avctx, "cblk size > 64");
389 return AVERROR_PATCHWELCOME;
392 c->cblk_style = bytestream2_get_byteu(&s->g);
393 if (c->cblk_style != 0) { // cblk style
394 av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
396 c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
397 /* set integer 9/7 DWT in case of BITEXACT flag */
398 if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
399 c->transform = FF_DWT97_INT;
401 if (c->csty & JPEG2000_CSTY_PREC) {
403 for (i = 0; i < c->nreslevels; i++) {
404 byte = bytestream2_get_byte(&s->g);
405 c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
406 c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
409 memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
410 memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
415 /* get coding parameters for a particular tile or whole image*/
416 static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
419 Jpeg2000CodingStyle tmp;
422 if (bytestream2_get_bytes_left(&s->g) < 5)
423 return AVERROR_INVALIDDATA;
425 tmp.csty = bytestream2_get_byteu(&s->g);
427 // get progression order
428 tmp.prog_order = bytestream2_get_byteu(&s->g);
430 tmp.nlayers = bytestream2_get_be16u(&s->g);
431 tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
433 if (tmp.mct && s->ncomponents < 3) {
434 av_log(s->avctx, AV_LOG_ERROR,
435 "MCT %d with too few components (%d)\n",
436 tmp.mct, s->ncomponents);
437 return AVERROR_INVALIDDATA;
440 if ((ret = get_cox(s, &tmp)) < 0)
443 for (compno = 0; compno < s->ncomponents; compno++)
444 if (!(properties[compno] & HAD_COC))
445 memcpy(c + compno, &tmp, sizeof(tmp));
449 /* Get coding parameters for a component in the whole image or a
450 * particular tile. */
451 static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
456 if (bytestream2_get_bytes_left(&s->g) < 2)
457 return AVERROR_INVALIDDATA;
459 compno = bytestream2_get_byteu(&s->g);
461 if (compno >= s->ncomponents) {
462 av_log(s->avctx, AV_LOG_ERROR,
463 "Invalid compno %d. There are %d components in the image.\n",
464 compno, s->ncomponents);
465 return AVERROR_INVALIDDATA;
469 c->csty = bytestream2_get_byteu(&s->g);
471 if ((ret = get_cox(s, c)) < 0)
474 properties[compno] |= HAD_COC;
478 /* Get common part for QCD and QCC segments. */
479 static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
483 if (bytestream2_get_bytes_left(&s->g) < 1)
484 return AVERROR_INVALIDDATA;
486 x = bytestream2_get_byteu(&s->g); // Sqcd
488 q->nguardbits = x >> 5;
489 q->quantsty = x & 0x1f;
491 if (q->quantsty == JPEG2000_QSTY_NONE) {
493 if (bytestream2_get_bytes_left(&s->g) < n ||
494 n > JPEG2000_MAX_DECLEVELS*3)
495 return AVERROR_INVALIDDATA;
496 for (i = 0; i < n; i++)
497 q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
498 } else if (q->quantsty == JPEG2000_QSTY_SI) {
499 if (bytestream2_get_bytes_left(&s->g) < 2)
500 return AVERROR_INVALIDDATA;
501 x = bytestream2_get_be16u(&s->g);
502 q->expn[0] = x >> 11;
503 q->mant[0] = x & 0x7ff;
504 for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
505 int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
506 q->expn[i] = curexpn;
507 q->mant[i] = q->mant[0];
511 if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
512 n > JPEG2000_MAX_DECLEVELS*3)
513 return AVERROR_INVALIDDATA;
514 for (i = 0; i < n; i++) {
515 x = bytestream2_get_be16u(&s->g);
516 q->expn[i] = x >> 11;
517 q->mant[i] = x & 0x7ff;
523 /* Get quantization parameters for a particular tile or a whole image. */
524 static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
527 Jpeg2000QuantStyle tmp;
530 if ((ret = get_qcx(s, n, &tmp)) < 0)
532 for (compno = 0; compno < s->ncomponents; compno++)
533 if (!(properties[compno] & HAD_QCC))
534 memcpy(q + compno, &tmp, sizeof(tmp));
538 /* Get quantization parameters for a component in the whole image
539 * on in a particular tile. */
540 static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
545 if (bytestream2_get_bytes_left(&s->g) < 1)
546 return AVERROR_INVALIDDATA;
548 compno = bytestream2_get_byteu(&s->g);
550 if (compno >= s->ncomponents) {
551 av_log(s->avctx, AV_LOG_ERROR,
552 "Invalid compno %d. There are %d components in the image.\n",
553 compno, s->ncomponents);
554 return AVERROR_INVALIDDATA;
557 properties[compno] |= HAD_QCC;
558 return get_qcx(s, n - 1, q + compno);
561 /* Get start of tile segment. */
562 static int get_sot(Jpeg2000DecoderContext *s, int n)
564 Jpeg2000TilePart *tp;
569 if (bytestream2_get_bytes_left(&s->g) < 8)
570 return AVERROR_INVALIDDATA;
573 Isot = bytestream2_get_be16u(&s->g); // Isot
574 if (Isot >= s->numXtiles * s->numYtiles)
575 return AVERROR_INVALIDDATA;
578 Psot = bytestream2_get_be32u(&s->g); // Psot
579 TPsot = bytestream2_get_byteu(&s->g); // TPsot
581 /* Read TNSot but not used */
582 bytestream2_get_byteu(&s->g); // TNsot
584 if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
585 av_log(s->avctx, AV_LOG_ERROR, "Psot %d too big\n", Psot);
586 return AVERROR_INVALIDDATA;
589 if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) {
590 avpriv_request_sample(s->avctx, "Support for %d components", TPsot);
591 return AVERROR_PATCHWELCOME;
594 s->tile[Isot].tp_idx = TPsot;
595 tp = s->tile[Isot].tile_part + TPsot;
596 tp->tile_index = Isot;
597 tp->tp_end = s->g.buffer + Psot - n - 2;
600 Jpeg2000Tile *tile = s->tile + s->curtileno;
603 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));
604 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));
610 /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
611 * Used to know the number of tile parts and lengths.
612 * There may be multiple TLMs in the header.
613 * TODO: The function is not used for tile-parts management, nor anywhere else.
614 * It can be useful to allocate memory for tile parts, before managing the SOT
615 * markers. Parsing the TLM header is needed to increment the input header
617 * This marker is mandatory for DCI. */
618 static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
620 uint8_t Stlm, ST, SP, tile_tlm, i;
621 bytestream2_get_byte(&s->g); /* Ztlm: skipped */
622 Stlm = bytestream2_get_byte(&s->g);
624 // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
625 ST = (Stlm >> 4) & 0x03;
626 // TODO: Manage case of ST = 0b11 --> raise error
627 SP = (Stlm >> 6) & 0x01;
628 tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
629 for (i = 0; i < tile_tlm; i++) {
634 bytestream2_get_byte(&s->g);
637 bytestream2_get_be16(&s->g);
640 bytestream2_get_be32(&s->g);
644 bytestream2_get_be16(&s->g);
646 bytestream2_get_be32(&s->g);
652 static int init_tile(Jpeg2000DecoderContext *s, int tileno)
655 int tilex = tileno % s->numXtiles;
656 int tiley = tileno / s->numXtiles;
657 Jpeg2000Tile *tile = s->tile + tileno;
660 return AVERROR(ENOMEM);
662 for (compno = 0; compno < s->ncomponents; compno++) {
663 Jpeg2000Component *comp = tile->comp + compno;
664 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
665 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
666 int ret; // global bandno
668 comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
669 comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
670 comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
671 comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
673 comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
674 comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
675 comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
676 comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
678 if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
679 s->cbps[compno], s->cdx[compno],
680 s->cdy[compno], s->avctx))
686 /* Read the number of coding passes. */
687 static int getnpasses(Jpeg2000DecoderContext *s)
694 if ((num = get_bits(s, 2)) != 3)
695 return num < 0 ? num : 3 + num;
696 if ((num = get_bits(s, 5)) != 31)
697 return num < 0 ? num : 6 + num;
698 num = get_bits(s, 7);
699 return num < 0 ? num : 37 + num;
702 static int getlblockinc(Jpeg2000DecoderContext *s)
705 while (ret = get_bits(s, 1)) {
713 static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
714 Jpeg2000CodingStyle *codsty,
715 Jpeg2000ResLevel *rlevel, int precno,
716 int layno, uint8_t *expn, int numgbits)
718 int bandno, cblkno, ret, nb_code_blocks;
720 if (!(ret = get_bits(s, 1))) {
726 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
727 Jpeg2000Band *band = rlevel->band + bandno;
728 Jpeg2000Prec *prec = band->prec + precno;
730 if (band->coord[0][0] == band->coord[0][1] ||
731 band->coord[1][0] == band->coord[1][1])
733 nb_code_blocks = prec->nb_codeblocks_height *
734 prec->nb_codeblocks_width;
735 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
736 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
737 int incl, newpasses, llen;
740 incl = get_bits(s, 1);
742 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
748 if (!cblk->npasses) {
749 int v = expn[bandno] + numgbits - 1 -
750 tag_tree_decode(s, prec->zerobits + cblkno, 100);
752 av_log(s->avctx, AV_LOG_ERROR,
753 "nonzerobits %d invalid\n", v);
754 return AVERROR_INVALIDDATA;
756 cblk->nonzerobits = v;
758 if ((newpasses = getnpasses(s)) < 0)
760 if ((llen = getlblockinc(s)) < 0)
762 cblk->lblock += llen;
763 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
765 if (ret > sizeof(cblk->data)) {
766 avpriv_request_sample(s->avctx,
767 "Block with lengthinc greater than %zu",
769 return AVERROR_PATCHWELCOME;
771 cblk->lengthinc = ret;
772 cblk->npasses += newpasses;
777 if (codsty->csty & JPEG2000_CSTY_EPH) {
778 if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
779 bytestream2_skip(&s->g, 2);
781 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
784 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
785 Jpeg2000Band *band = rlevel->band + bandno;
786 Jpeg2000Prec *prec = band->prec + precno;
788 nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
789 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
790 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
791 if ( bytestream2_get_bytes_left(&s->g) < cblk->lengthinc
792 || sizeof(cblk->data) < cblk->length + cblk->lengthinc + 2
794 return AVERROR_INVALIDDATA;
796 bytestream2_get_bufferu(&s->g, cblk->data + cblk->length, cblk->lengthinc);
797 cblk->length += cblk->lengthinc;
804 static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
807 int layno, reslevelno, compno, precno, ok_reslevel;
811 switch (tile->codsty[0].prog_order) {
812 case JPEG2000_PGOD_RLCP:
813 avpriv_request_sample(s->avctx, "Progression order RLCP");
815 case JPEG2000_PGOD_LRCP:
816 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
818 for (reslevelno = 0; ok_reslevel; reslevelno++) {
820 for (compno = 0; compno < s->ncomponents; compno++) {
821 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
822 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
823 if (reslevelno < codsty->nreslevels) {
824 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
827 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
828 if ((ret = jpeg2000_decode_packet(s,
831 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
832 qntsty->nguardbits)) < 0)
840 case JPEG2000_PGOD_CPRL:
841 for (compno = 0; compno < s->ncomponents; compno++) {
842 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
843 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
845 /* Set bit stream buffer address according to tile-part.
846 * For DCinema one tile-part per component, so can be
847 * indexed by component. */
848 s->g = tile->tile_part[compno].tpg;
850 /* Position loop (y axis)
851 * TODO: Automate computing of step 256.
852 * Fixed here, but to be computed before entering here. */
853 for (y = 0; y < s->height; y += 256) {
854 /* Position loop (y axis)
855 * TODO: automate computing of step 256.
856 * Fixed here, but to be computed before entering here. */
857 for (x = 0; x < s->width; x += 256) {
858 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
860 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
861 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
863 if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
864 (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
867 if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
868 (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
871 // check if a precinct exists
872 prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
873 prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
874 precno = prcx + rlevel->num_precincts_x * prcy;
875 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
876 if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
878 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
879 qntsty->nguardbits)) < 0)
888 case JPEG2000_PGOD_RPCL:
889 avpriv_request_sample(s->avctx, "Progression order RPCL");
890 ret = AVERROR_PATCHWELCOME;
893 case JPEG2000_PGOD_PCRL:
894 avpriv_request_sample(s->avctx, "Progression order PCRL");
895 ret = AVERROR_PATCHWELCOME;
902 /* EOC marker reached */
903 bytestream2_skip(&s->g, 2);
908 /* TIER-1 routines */
909 static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
910 int bpno, int bandno, int bpass_csty_symbol,
911 int vert_causal_ctx_csty_symbol)
913 int mask = 3 << (bpno - 1), y0, x, y;
915 for (y0 = 0; y0 < height; y0 += 4)
916 for (x = 0; x < width; x++)
917 for (y = y0; y < height && y < y0 + 4; y++) {
918 if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
919 && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
921 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
922 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
923 if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {
924 int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
925 if (bpass_csty_symbol)
926 t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
928 t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
931 ff_jpeg2000_set_significance(t1, x, y,
934 t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
939 static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
945 phalf = 1 << (bpno - 1);
948 for (y0 = 0; y0 < height; y0 += 4)
949 for (x = 0; x < width; x++)
950 for (y = y0; y < height && y < y0 + 4; y++)
951 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
952 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
953 int r = ff_mqc_decode(&t1->mqc,
954 t1->mqc.cx_states + ctxno)
956 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
957 t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
961 static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
962 int width, int height, int bpno, int bandno,
963 int seg_symbols, int vert_causal_ctx_csty_symbol)
965 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
967 for (y0 = 0; y0 < height; y0 += 4) {
968 for (x = 0; x < width; x++) {
969 if (y0 + 3 < height &&
970 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
971 (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
972 (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
973 (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
974 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
976 runlen = ff_mqc_decode(&t1->mqc,
977 t1->mqc.cx_states + MQC_CX_UNI);
978 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
987 for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
989 if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
991 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
992 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
993 dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,
999 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
1001 t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
1002 t1->mqc.cx_states + ctxno) ^
1005 ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
1008 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
1014 val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1015 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1016 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1017 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1019 av_log(s->avctx, AV_LOG_ERROR,
1020 "Segmentation symbol value incorrect\n");
1024 static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
1025 Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
1026 int width, int height, int bandpos)
1028 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
1029 int clnpass_cnt = 0;
1030 int bpass_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_BYPASS;
1031 int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC;
1033 av_assert0(width <= JPEG2000_MAX_CBLKW);
1034 av_assert0(height <= JPEG2000_MAX_CBLKH);
1036 for (y = 0; y < height; y++)
1037 memset(t1->data[y], 0, width * sizeof(**t1->data));
1039 /* If code-block contains no compressed data: nothing to do. */
1043 for (y = 0; y < height + 2; y++)
1044 memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags));
1046 cblk->data[cblk->length] = 0xff;
1047 cblk->data[cblk->length+1] = 0xff;
1048 ff_mqc_initdec(&t1->mqc, cblk->data);
1053 decode_sigpass(t1, width, height, bpno + 1, bandpos,
1054 bpass_csty_symbol && (clnpass_cnt >= 4),
1055 vert_causal_ctx_csty_symbol);
1058 decode_refpass(t1, width, height, bpno + 1);
1059 if (bpass_csty_symbol && clnpass_cnt >= 4)
1060 ff_mqc_initdec(&t1->mqc, cblk->data);
1063 decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
1064 codsty->cblk_style & JPEG2000_CBLK_SEGSYM,
1065 vert_causal_ctx_csty_symbol);
1066 clnpass_cnt = clnpass_cnt + 1;
1067 if (bpass_csty_symbol && clnpass_cnt >= 4)
1068 ff_mqc_initdec(&t1->mqc, cblk->data);
1081 /* TODO: Verify dequantization for lossless case
1082 * comp->data can be float or int
1083 * band->stepsize can be float or int
1084 * depending on the type of DWT transformation.
1085 * see ISO/IEC 15444-1:2002 A.6.1 */
1087 /* Float dequantization of a codeblock.*/
1088 static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
1089 Jpeg2000Component *comp,
1090 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1093 int w = cblk->coord[0][1] - cblk->coord[0][0];
1094 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1095 float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1096 int *src = t1->data[j];
1097 for (i = 0; i < w; ++i)
1098 datap[i] = src[i] * band->f_stepsize;
1102 /* Integer dequantization of a codeblock.*/
1103 static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
1104 Jpeg2000Component *comp,
1105 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1108 int w = cblk->coord[0][1] - cblk->coord[0][0];
1109 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1110 int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1111 int *src = t1->data[j];
1112 for (i = 0; i < w; ++i)
1113 datap[i] = (src[i] * band->i_stepsize + (1 << 14)) >> 15;
1117 /* Inverse ICT parameters in float and integer.
1118 * int value = (float value) * (1<<16) */
1119 static const float f_ict_params[4] = {
1125 static const int i_ict_params[4] = {
1132 static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
1135 int32_t *src[3], i0, i1, i2;
1136 float *srcf[3], i0f, i1f, i2f;
1138 for (i = 0; i < 3; i++)
1139 if (tile->codsty[0].transform == FF_DWT97)
1140 srcf[i] = tile->comp[i].f_data;
1142 src [i] = tile->comp[i].i_data;
1144 for (i = 0; i < 2; i++)
1145 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
1147 switch (tile->codsty[0].transform) {
1149 for (i = 0; i < csize; i++) {
1150 i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
1151 i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
1152 - (f_ict_params[2] * *srcf[2]);
1153 i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
1160 for (i = 0; i < csize; i++) {
1161 i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
1162 i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
1163 - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
1164 i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
1171 for (i = 0; i < csize; i++) {
1172 i1 = *src[0] - (*src[2] + *src[1] >> 2);
1183 static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1186 int compno, reslevelno, bandno;
1190 Jpeg2000T1Context t1;
1192 /* Loop on tile components */
1193 for (compno = 0; compno < s->ncomponents; compno++) {
1194 Jpeg2000Component *comp = tile->comp + compno;
1195 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1197 /* Loop on resolution levels */
1198 for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1199 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1201 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1202 int nb_precincts, precno;
1203 Jpeg2000Band *band = rlevel->band + bandno;
1204 int cblkno = 0, bandpos;
1206 bandpos = bandno + (reslevelno > 0);
1208 if (band->coord[0][0] == band->coord[0][1] ||
1209 band->coord[1][0] == band->coord[1][1])
1212 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1213 /* Loop on precincts */
1214 for (precno = 0; precno < nb_precincts; precno++) {
1215 Jpeg2000Prec *prec = band->prec + precno;
1217 /* Loop on codeblocks */
1218 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1220 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1221 decode_cblk(s, codsty, &t1, cblk,
1222 cblk->coord[0][1] - cblk->coord[0][0],
1223 cblk->coord[1][1] - cblk->coord[1][0],
1226 x = cblk->coord[0][0];
1227 y = cblk->coord[1][0];
1229 if (codsty->transform == FF_DWT97)
1230 dequantization_float(x, y, cblk, comp, &t1, band);
1232 dequantization_int(x, y, cblk, comp, &t1, band);
1236 } /* end reslevel */
1239 ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data);
1242 /* inverse MCT transformation */
1243 if (tile->codsty[0].mct)
1244 mct_decode(s, tile);
1246 if (s->cdef[0] < 0) {
1247 for (x = 0; x < s->ncomponents; x++)
1249 if ((s->ncomponents & 1) == 0)
1250 s->cdef[s->ncomponents-1] = 0;
1253 if (s->precision <= 8) {
1254 for (compno = 0; compno < s->ncomponents; compno++) {
1255 Jpeg2000Component *comp = tile->comp + compno;
1256 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1257 float *datap = comp->f_data;
1258 int32_t *i_datap = comp->i_data;
1259 int cbps = s->cbps[compno];
1260 int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1261 int planar = !!picture->data[2];
1262 int pixelsize = planar ? 1 : s->ncomponents;
1266 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1269 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1270 line = picture->data[plane] + y * picture->linesize[plane];
1271 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1274 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1275 dst = line + x * pixelsize + compno*!planar;
1277 if (codsty->transform == FF_DWT97) {
1278 for (; x < w; x += s->cdx[compno]) {
1279 int val = lrintf(*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 for (; x < w; x += s->cdx[compno]) {
1288 int val = *i_datap + (1 << (cbps - 1));
1289 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1290 val = av_clip(val, 0, (1 << cbps) - 1);
1291 *dst = val << (8 - cbps);
1296 line += picture->linesize[plane];
1300 for (compno = 0; compno < s->ncomponents; compno++) {
1301 Jpeg2000Component *comp = tile->comp + compno;
1302 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1303 float *datap = comp->f_data;
1304 int32_t *i_datap = comp->i_data;
1306 int cbps = s->cbps[compno];
1307 int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1308 int planar = !!picture->data[2];
1309 int pixelsize = planar ? 1 : s->ncomponents;
1313 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1315 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1316 linel = (uint16_t *)picture->data[plane] + y * (picture->linesize[plane] >> 1);
1317 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1320 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1321 dst = linel + (x * pixelsize + compno*!planar);
1322 if (codsty->transform == FF_DWT97) {
1323 for (; x < w; x += s-> cdx[compno]) {
1324 int val = lrintf(*datap) + (1 << (cbps - 1));
1325 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1326 val = av_clip(val, 0, (1 << cbps) - 1);
1327 /* align 12 bit values in little-endian mode */
1328 *dst = val << (16 - cbps);
1333 for (; x < w; x += s-> cdx[compno]) {
1334 int val = *i_datap + (1 << (cbps - 1));
1335 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1336 val = av_clip(val, 0, (1 << cbps) - 1);
1337 /* align 12 bit values in little-endian mode */
1338 *dst = val << (16 - cbps);
1343 linel += picture->linesize[plane] >> 1;
1351 static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1354 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1355 if (s->tile[tileno].comp) {
1356 for (compno = 0; compno < s->ncomponents; compno++) {
1357 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1358 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1360 ff_jpeg2000_cleanup(comp, codsty);
1362 av_freep(&s->tile[tileno].comp);
1366 s->numXtiles = s->numYtiles = 0;
1369 static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1371 Jpeg2000CodingStyle *codsty = s->codsty;
1372 Jpeg2000QuantStyle *qntsty = s->qntsty;
1373 uint8_t *properties = s->properties;
1380 if (bytestream2_get_bytes_left(&s->g) < 2) {
1381 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1385 marker = bytestream2_get_be16u(&s->g);
1386 oldpos = bytestream2_tell(&s->g);
1388 if (marker == JPEG2000_SOD) {
1390 Jpeg2000TilePart *tp;
1392 if (s->curtileno < 0) {
1393 av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n");
1394 return AVERROR_INVALIDDATA;
1397 tile = s->tile + s->curtileno;
1398 tp = tile->tile_part + tile->tp_idx;
1399 if (tp->tp_end < s->g.buffer) {
1400 av_log(s->avctx, AV_LOG_ERROR, "Invalid tpend\n");
1401 return AVERROR_INVALIDDATA;
1403 bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer);
1404 bytestream2_skip(&s->g, tp->tp_end - s->g.buffer);
1408 if (marker == JPEG2000_EOC)
1411 len = bytestream2_get_be16(&s->g);
1412 if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2)
1413 return AVERROR_INVALIDDATA;
1419 s->numXtiles = s->numYtiles = 0;
1422 ret = get_coc(s, codsty, properties);
1425 ret = get_cod(s, codsty, properties);
1428 ret = get_qcc(s, len, qntsty, properties);
1431 ret = get_qcd(s, len, qntsty, properties);
1434 if (!(ret = get_sot(s, len))) {
1435 av_assert1(s->curtileno >= 0);
1436 codsty = s->tile[s->curtileno].codsty;
1437 qntsty = s->tile[s->curtileno].qntsty;
1438 properties = s->tile[s->curtileno].properties;
1442 // the comment is ignored
1443 bytestream2_skip(&s->g, len - 2);
1446 // Tile-part lengths
1447 ret = get_tlm(s, len);
1450 av_log(s->avctx, AV_LOG_ERROR,
1451 "unsupported marker 0x%.4X at pos 0x%X\n",
1452 marker, bytestream2_tell(&s->g) - 4);
1453 bytestream2_skip(&s->g, len - 2);
1456 if (bytestream2_tell(&s->g) - oldpos != len || ret) {
1457 av_log(s->avctx, AV_LOG_ERROR,
1458 "error during processing marker segment %.4x\n", marker);
1459 return ret ? ret : -1;
1465 /* Read bit stream packets --> T2 operation. */
1466 static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1471 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1472 Jpeg2000Tile *tile = s->tile + tileno;
1474 if (ret = init_tile(s, tileno))
1477 s->g = tile->tile_part[0].tpg;
1478 if (ret = jpeg2000_decode_packets(s, tile))
1485 static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1487 uint32_t atom_size, atom, atom_end;
1488 int search_range = 10;
1492 bytestream2_get_bytes_left(&s->g) >= 8) {
1493 atom_size = bytestream2_get_be32u(&s->g);
1494 atom = bytestream2_get_be32u(&s->g);
1495 atom_end = bytestream2_tell(&s->g) + atom_size - 8;
1497 if (atom == JP2_CODESTREAM)
1500 if (bytestream2_get_bytes_left(&s->g) < atom_size || atom_end < atom_size)
1503 if (atom == JP2_HEADER &&
1505 uint32_t atom2_size, atom2, atom2_end;
1507 atom2_size = bytestream2_get_be32u(&s->g);
1508 atom2 = bytestream2_get_be32u(&s->g);
1509 atom2_end = bytestream2_tell(&s->g) + atom2_size - 8;
1510 if (atom2_size < 8 || atom2_end > atom_end || atom2_end < atom2_size)
1512 if (atom2 == JP2_CODESTREAM) {
1514 } else if (atom2 == MKBETAG('c','o','l','r') && atom2_size >= 7) {
1515 int method = bytestream2_get_byteu(&s->g);
1516 bytestream2_skipu(&s->g, 2);
1518 s->colour_space = bytestream2_get_be32u(&s->g);
1520 } else if (atom2 == MKBETAG('p','c','l','r') && atom2_size >= 6) {
1521 int i, size, colour_count, colour_channels, colour_depth[3];
1523 colour_count = bytestream2_get_be16u(&s->g);
1524 colour_channels = bytestream2_get_byteu(&s->g);
1525 // FIXME: Do not ignore channel_sign
1526 colour_depth[0] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1527 colour_depth[1] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1528 colour_depth[2] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1529 size = (colour_depth[0] + 7 >> 3) * colour_count +
1530 (colour_depth[1] + 7 >> 3) * colour_count +
1531 (colour_depth[2] + 7 >> 3) * colour_count;
1532 if (colour_count > 256 ||
1533 colour_channels != 3 ||
1534 colour_depth[0] > 16 ||
1535 colour_depth[1] > 16 ||
1536 colour_depth[2] > 16 ||
1537 atom2_size < size) {
1538 avpriv_request_sample(s->avctx, "Unknown palette");
1539 bytestream2_seek(&s->g, atom2_end, SEEK_SET);
1543 for (i = 0; i < colour_count; i++) {
1544 if (colour_depth[0] <= 8) {
1545 r = bytestream2_get_byteu(&s->g) << 8 - colour_depth[0];
1546 r |= r >> colour_depth[0];
1548 r = bytestream2_get_be16u(&s->g) >> colour_depth[0] - 8;
1550 if (colour_depth[1] <= 8) {
1551 g = bytestream2_get_byteu(&s->g) << 8 - colour_depth[1];
1552 r |= r >> colour_depth[1];
1554 g = bytestream2_get_be16u(&s->g) >> colour_depth[1] - 8;
1556 if (colour_depth[2] <= 8) {
1557 b = bytestream2_get_byteu(&s->g) << 8 - colour_depth[2];
1558 r |= r >> colour_depth[2];
1560 b = bytestream2_get_be16u(&s->g) >> colour_depth[2] - 8;
1562 s->palette[i] = 0xffu << 24 | r << 16 | g << 8 | b;
1564 } else if (atom2 == MKBETAG('c','d','e','f') && atom2_size >= 2) {
1565 int n = bytestream2_get_be16u(&s->g);
1567 int cn = bytestream2_get_be16(&s->g);
1568 int av_unused typ = bytestream2_get_be16(&s->g);
1569 int asoc = bytestream2_get_be16(&s->g);
1570 if (cn < 4 || asoc < 4)
1574 bytestream2_seek(&s->g, atom2_end, SEEK_SET);
1575 } while (atom_end - atom2_end >= 8);
1579 bytestream2_seek(&s->g, atom_end, SEEK_SET);
1585 static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1586 int *got_frame, AVPacket *avpkt)
1588 Jpeg2000DecoderContext *s = avctx->priv_data;
1589 ThreadFrame frame = { .f = data };
1590 AVFrame *picture = data;
1594 bytestream2_init(&s->g, avpkt->data, avpkt->size);
1596 memset(s->cdef, -1, sizeof(s->cdef));
1598 if (bytestream2_get_bytes_left(&s->g) < 2) {
1599 ret = AVERROR_INVALIDDATA;
1603 // check if the image is in jp2 format
1604 if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1605 (bytestream2_get_be32u(&s->g) == 12) &&
1606 (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1607 (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
1608 if (!jp2_find_codestream(s)) {
1609 av_log(avctx, AV_LOG_ERROR,
1610 "Could not find Jpeg2000 codestream atom.\n");
1611 ret = AVERROR_INVALIDDATA;
1615 bytestream2_seek(&s->g, 0, SEEK_SET);
1618 if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
1619 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1620 ret = AVERROR_INVALIDDATA;
1623 if (ret = jpeg2000_read_main_headers(s))
1626 /* get picture buffer */
1627 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1629 picture->pict_type = AV_PICTURE_TYPE_I;
1630 picture->key_frame = 1;
1632 if (ret = jpeg2000_read_bitstream_packets(s))
1635 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1636 if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
1639 jpeg2000_dec_cleanup(s);
1643 if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
1644 memcpy(picture->data[1], s->palette, 256 * sizeof(uint32_t));
1646 return bytestream2_tell(&s->g);
1649 jpeg2000_dec_cleanup(s);
1653 static void jpeg2000_init_static_data(AVCodec *codec)
1655 ff_jpeg2000_init_tier1_luts();
1656 ff_mqc_init_context_tables();
1659 #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1660 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1662 static const AVOption options[] = {
1663 { "lowres", "Lower the decoding resolution by a power of two",
1664 OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1668 static const AVProfile profiles[] = {
1669 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
1670 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
1671 { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
1672 { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
1673 { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
1674 { FF_PROFILE_UNKNOWN },
1677 static const AVClass jpeg2000_class = {
1678 .class_name = "jpeg2000",
1679 .item_name = av_default_item_name,
1681 .version = LIBAVUTIL_VERSION_INT,
1684 AVCodec ff_jpeg2000_decoder = {
1686 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1687 .type = AVMEDIA_TYPE_VIDEO,
1688 .id = AV_CODEC_ID_JPEG2000,
1689 .capabilities = CODEC_CAP_FRAME_THREADS,
1690 .priv_data_size = sizeof(Jpeg2000DecoderContext),
1691 .init_static_data = jpeg2000_init_static_data,
1692 .decode = jpeg2000_decode_frame,
1693 .priv_class = &jpeg2000_class,
1695 .profiles = NULL_IF_CONFIG_SMALL(profiles)