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 separation %d/%d\n", s->cdx[i], s->cdy[i]);
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);
353 s->avctx->bits_per_raw_sample = s->precision;
357 /* get common part for COD and COC segments */
358 static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
362 if (bytestream2_get_bytes_left(&s->g) < 5)
363 return AVERROR_INVALIDDATA;
365 /* nreslevels = number of resolution levels
366 = number of decomposition level +1 */
367 c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
368 if (c->nreslevels >= JPEG2000_MAX_RESLEVELS) {
369 av_log(s->avctx, AV_LOG_ERROR, "nreslevels %d is invalid\n", c->nreslevels);
370 return AVERROR_INVALIDDATA;
373 /* compute number of resolution levels to decode */
374 if (c->nreslevels < s->reduction_factor)
375 c->nreslevels2decode = 1;
377 c->nreslevels2decode = c->nreslevels - s->reduction_factor;
379 c->log2_cblk_width = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk width
380 c->log2_cblk_height = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk height
382 if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
383 c->log2_cblk_width + c->log2_cblk_height > 12) {
384 av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
385 return AVERROR_INVALIDDATA;
388 if (c->log2_cblk_width > 6 || c->log2_cblk_height > 6) {
389 avpriv_request_sample(s->avctx, "cblk size > 64");
390 return AVERROR_PATCHWELCOME;
393 c->cblk_style = bytestream2_get_byteu(&s->g);
394 if (c->cblk_style != 0) { // cblk style
395 av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
397 c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
398 /* set integer 9/7 DWT in case of BITEXACT flag */
399 if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
400 c->transform = FF_DWT97_INT;
402 if (c->csty & JPEG2000_CSTY_PREC) {
404 for (i = 0; i < c->nreslevels; i++) {
405 byte = bytestream2_get_byte(&s->g);
406 c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
407 c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
410 memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
411 memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
416 /* get coding parameters for a particular tile or whole image*/
417 static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
420 Jpeg2000CodingStyle tmp;
423 if (bytestream2_get_bytes_left(&s->g) < 5)
424 return AVERROR_INVALIDDATA;
426 tmp.csty = bytestream2_get_byteu(&s->g);
428 // get progression order
429 tmp.prog_order = bytestream2_get_byteu(&s->g);
431 tmp.nlayers = bytestream2_get_be16u(&s->g);
432 tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
434 if (tmp.mct && s->ncomponents < 3) {
435 av_log(s->avctx, AV_LOG_ERROR,
436 "MCT %d with too few components (%d)\n",
437 tmp.mct, s->ncomponents);
438 return AVERROR_INVALIDDATA;
441 if ((ret = get_cox(s, &tmp)) < 0)
444 for (compno = 0; compno < s->ncomponents; compno++)
445 if (!(properties[compno] & HAD_COC))
446 memcpy(c + compno, &tmp, sizeof(tmp));
450 /* Get coding parameters for a component in the whole image or a
451 * particular tile. */
452 static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
457 if (bytestream2_get_bytes_left(&s->g) < 2)
458 return AVERROR_INVALIDDATA;
460 compno = bytestream2_get_byteu(&s->g);
462 if (compno >= s->ncomponents) {
463 av_log(s->avctx, AV_LOG_ERROR,
464 "Invalid compno %d. There are %d components in the image.\n",
465 compno, s->ncomponents);
466 return AVERROR_INVALIDDATA;
470 c->csty = bytestream2_get_byteu(&s->g);
472 if ((ret = get_cox(s, c)) < 0)
475 properties[compno] |= HAD_COC;
479 /* Get common part for QCD and QCC segments. */
480 static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
484 if (bytestream2_get_bytes_left(&s->g) < 1)
485 return AVERROR_INVALIDDATA;
487 x = bytestream2_get_byteu(&s->g); // Sqcd
489 q->nguardbits = x >> 5;
490 q->quantsty = x & 0x1f;
492 if (q->quantsty == JPEG2000_QSTY_NONE) {
494 if (bytestream2_get_bytes_left(&s->g) < n ||
495 n > JPEG2000_MAX_DECLEVELS*3)
496 return AVERROR_INVALIDDATA;
497 for (i = 0; i < n; i++)
498 q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
499 } else if (q->quantsty == JPEG2000_QSTY_SI) {
500 if (bytestream2_get_bytes_left(&s->g) < 2)
501 return AVERROR_INVALIDDATA;
502 x = bytestream2_get_be16u(&s->g);
503 q->expn[0] = x >> 11;
504 q->mant[0] = x & 0x7ff;
505 for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
506 int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
507 q->expn[i] = curexpn;
508 q->mant[i] = q->mant[0];
512 if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
513 n > JPEG2000_MAX_DECLEVELS*3)
514 return AVERROR_INVALIDDATA;
515 for (i = 0; i < n; i++) {
516 x = bytestream2_get_be16u(&s->g);
517 q->expn[i] = x >> 11;
518 q->mant[i] = x & 0x7ff;
524 /* Get quantization parameters for a particular tile or a whole image. */
525 static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
528 Jpeg2000QuantStyle tmp;
531 if ((ret = get_qcx(s, n, &tmp)) < 0)
533 for (compno = 0; compno < s->ncomponents; compno++)
534 if (!(properties[compno] & HAD_QCC))
535 memcpy(q + compno, &tmp, sizeof(tmp));
539 /* Get quantization parameters for a component in the whole image
540 * on in a particular tile. */
541 static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
546 if (bytestream2_get_bytes_left(&s->g) < 1)
547 return AVERROR_INVALIDDATA;
549 compno = bytestream2_get_byteu(&s->g);
551 if (compno >= s->ncomponents) {
552 av_log(s->avctx, AV_LOG_ERROR,
553 "Invalid compno %d. There are %d components in the image.\n",
554 compno, s->ncomponents);
555 return AVERROR_INVALIDDATA;
558 properties[compno] |= HAD_QCC;
559 return get_qcx(s, n - 1, q + compno);
562 /* Get start of tile segment. */
563 static int get_sot(Jpeg2000DecoderContext *s, int n)
565 Jpeg2000TilePart *tp;
570 if (bytestream2_get_bytes_left(&s->g) < 8)
571 return AVERROR_INVALIDDATA;
574 Isot = bytestream2_get_be16u(&s->g); // Isot
575 if (Isot >= s->numXtiles * s->numYtiles)
576 return AVERROR_INVALIDDATA;
579 Psot = bytestream2_get_be32u(&s->g); // Psot
580 TPsot = bytestream2_get_byteu(&s->g); // TPsot
582 /* Read TNSot but not used */
583 bytestream2_get_byteu(&s->g); // TNsot
585 if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
586 av_log(s->avctx, AV_LOG_ERROR, "Psot %d too big\n", Psot);
587 return AVERROR_INVALIDDATA;
590 if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) {
591 avpriv_request_sample(s->avctx, "Support for %d components", TPsot);
592 return AVERROR_PATCHWELCOME;
595 s->tile[Isot].tp_idx = TPsot;
596 tp = s->tile[Isot].tile_part + TPsot;
597 tp->tile_index = Isot;
598 tp->tp_end = s->g.buffer + Psot - n - 2;
601 Jpeg2000Tile *tile = s->tile + s->curtileno;
604 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));
605 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));
611 /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
612 * Used to know the number of tile parts and lengths.
613 * There may be multiple TLMs in the header.
614 * TODO: The function is not used for tile-parts management, nor anywhere else.
615 * It can be useful to allocate memory for tile parts, before managing the SOT
616 * markers. Parsing the TLM header is needed to increment the input header
618 * This marker is mandatory for DCI. */
619 static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
621 uint8_t Stlm, ST, SP, tile_tlm, i;
622 bytestream2_get_byte(&s->g); /* Ztlm: skipped */
623 Stlm = bytestream2_get_byte(&s->g);
625 // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
626 ST = (Stlm >> 4) & 0x03;
627 // TODO: Manage case of ST = 0b11 --> raise error
628 SP = (Stlm >> 6) & 0x01;
629 tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
630 for (i = 0; i < tile_tlm; i++) {
635 bytestream2_get_byte(&s->g);
638 bytestream2_get_be16(&s->g);
641 bytestream2_get_be32(&s->g);
645 bytestream2_get_be16(&s->g);
647 bytestream2_get_be32(&s->g);
653 static int init_tile(Jpeg2000DecoderContext *s, int tileno)
656 int tilex = tileno % s->numXtiles;
657 int tiley = tileno / s->numXtiles;
658 Jpeg2000Tile *tile = s->tile + tileno;
661 return AVERROR(ENOMEM);
663 for (compno = 0; compno < s->ncomponents; compno++) {
664 Jpeg2000Component *comp = tile->comp + compno;
665 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
666 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
667 int ret; // global bandno
669 comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
670 comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
671 comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
672 comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
674 comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
675 comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
676 comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
677 comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
679 if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
680 s->cbps[compno], s->cdx[compno],
681 s->cdy[compno], s->avctx))
687 /* Read the number of coding passes. */
688 static int getnpasses(Jpeg2000DecoderContext *s)
695 if ((num = get_bits(s, 2)) != 3)
696 return num < 0 ? num : 3 + num;
697 if ((num = get_bits(s, 5)) != 31)
698 return num < 0 ? num : 6 + num;
699 num = get_bits(s, 7);
700 return num < 0 ? num : 37 + num;
703 static int getlblockinc(Jpeg2000DecoderContext *s)
706 while (ret = get_bits(s, 1)) {
714 static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
715 Jpeg2000CodingStyle *codsty,
716 Jpeg2000ResLevel *rlevel, int precno,
717 int layno, uint8_t *expn, int numgbits)
719 int bandno, cblkno, ret, nb_code_blocks;
721 if (!(ret = get_bits(s, 1))) {
727 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
728 Jpeg2000Band *band = rlevel->band + bandno;
729 Jpeg2000Prec *prec = band->prec + precno;
731 if (band->coord[0][0] == band->coord[0][1] ||
732 band->coord[1][0] == band->coord[1][1])
734 nb_code_blocks = prec->nb_codeblocks_height *
735 prec->nb_codeblocks_width;
736 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
737 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
738 int incl, newpasses, llen;
741 incl = get_bits(s, 1);
743 incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
749 if (!cblk->npasses) {
750 int v = expn[bandno] + numgbits - 1 -
751 tag_tree_decode(s, prec->zerobits + cblkno, 100);
753 av_log(s->avctx, AV_LOG_ERROR,
754 "nonzerobits %d invalid\n", v);
755 return AVERROR_INVALIDDATA;
757 cblk->nonzerobits = v;
759 if ((newpasses = getnpasses(s)) < 0)
761 if ((llen = getlblockinc(s)) < 0)
763 cblk->lblock += llen;
764 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
766 if (ret > sizeof(cblk->data)) {
767 avpriv_request_sample(s->avctx,
768 "Block with lengthinc greater than %zu",
770 return AVERROR_PATCHWELCOME;
772 cblk->lengthinc = ret;
773 cblk->npasses += newpasses;
778 if (codsty->csty & JPEG2000_CSTY_EPH) {
779 if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
780 bytestream2_skip(&s->g, 2);
782 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
785 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
786 Jpeg2000Band *band = rlevel->band + bandno;
787 Jpeg2000Prec *prec = band->prec + precno;
789 nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
790 for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
791 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
792 if ( bytestream2_get_bytes_left(&s->g) < cblk->lengthinc
793 || sizeof(cblk->data) < cblk->length + cblk->lengthinc + 2
795 return AVERROR_INVALIDDATA;
797 bytestream2_get_bufferu(&s->g, cblk->data + cblk->length, cblk->lengthinc);
798 cblk->length += cblk->lengthinc;
805 static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
808 int layno, reslevelno, compno, precno, ok_reslevel;
812 switch (tile->codsty[0].prog_order) {
813 case JPEG2000_PGOD_RLCP:
814 avpriv_request_sample(s->avctx, "Progression order RLCP");
816 case JPEG2000_PGOD_LRCP:
817 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
819 for (reslevelno = 0; ok_reslevel; reslevelno++) {
821 for (compno = 0; compno < s->ncomponents; compno++) {
822 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
823 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
824 if (reslevelno < codsty->nreslevels) {
825 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
828 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
829 if ((ret = jpeg2000_decode_packet(s,
832 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
833 qntsty->nguardbits)) < 0)
841 case JPEG2000_PGOD_CPRL:
842 for (compno = 0; compno < s->ncomponents; compno++) {
843 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
844 Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
846 /* Set bit stream buffer address according to tile-part.
847 * For DCinema one tile-part per component, so can be
848 * indexed by component. */
849 s->g = tile->tile_part[compno].tpg;
851 /* Position loop (y axis)
852 * TODO: Automate computing of step 256.
853 * Fixed here, but to be computed before entering here. */
854 for (y = 0; y < s->height; y += 256) {
855 /* Position loop (y axis)
856 * TODO: automate computing of step 256.
857 * Fixed here, but to be computed before entering here. */
858 for (x = 0; x < s->width; x += 256) {
859 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
861 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
862 Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
864 if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
865 (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
868 if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
869 (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
872 // check if a precinct exists
873 prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
874 prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
875 precno = prcx + rlevel->num_precincts_x * prcy;
876 for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
877 if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
879 qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
880 qntsty->nguardbits)) < 0)
889 case JPEG2000_PGOD_RPCL:
890 avpriv_request_sample(s->avctx, "Progression order RPCL");
891 ret = AVERROR_PATCHWELCOME;
894 case JPEG2000_PGOD_PCRL:
895 avpriv_request_sample(s->avctx, "Progression order PCRL");
896 ret = AVERROR_PATCHWELCOME;
903 /* EOC marker reached */
904 bytestream2_skip(&s->g, 2);
909 /* TIER-1 routines */
910 static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
911 int bpno, int bandno, int bpass_csty_symbol,
912 int vert_causal_ctx_csty_symbol)
914 int mask = 3 << (bpno - 1), y0, x, y;
916 for (y0 = 0; y0 < height; y0 += 4)
917 for (x = 0; x < width; x++)
918 for (y = y0; y < height && y < y0 + 4; y++) {
919 if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
920 && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
922 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
923 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
924 if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {
925 int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
926 if (bpass_csty_symbol)
927 t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
929 t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
932 ff_jpeg2000_set_significance(t1, x, y,
935 t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
940 static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
946 phalf = 1 << (bpno - 1);
949 for (y0 = 0; y0 < height; y0 += 4)
950 for (x = 0; x < width; x++)
951 for (y = y0; y < height && y < y0 + 4; y++)
952 if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
953 int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
954 int r = ff_mqc_decode(&t1->mqc,
955 t1->mqc.cx_states + ctxno)
957 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
958 t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
962 static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
963 int width, int height, int bpno, int bandno,
964 int seg_symbols, int vert_causal_ctx_csty_symbol)
966 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
968 for (y0 = 0; y0 < height; y0 += 4) {
969 for (x = 0; x < width; x++) {
970 if (y0 + 3 < height &&
971 !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
972 (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
973 (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
974 (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
975 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
977 runlen = ff_mqc_decode(&t1->mqc,
978 t1->mqc.cx_states + MQC_CX_UNI);
979 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
988 for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
990 if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
992 if (vert_causal_ctx_csty_symbol && y == y0 + 3)
993 flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
994 dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,
1000 int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
1002 t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
1003 t1->mqc.cx_states + ctxno) ^
1006 ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
1009 t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
1015 val = 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);
1018 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
1020 av_log(s->avctx, AV_LOG_ERROR,
1021 "Segmentation symbol value incorrect\n");
1025 static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
1026 Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
1027 int width, int height, int bandpos)
1029 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
1030 int clnpass_cnt = 0;
1031 int bpass_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_BYPASS;
1032 int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC;
1034 av_assert0(width <= JPEG2000_MAX_CBLKW);
1035 av_assert0(height <= JPEG2000_MAX_CBLKH);
1037 for (y = 0; y < height; y++)
1038 memset(t1->data[y], 0, width * sizeof(**t1->data));
1040 /* If code-block contains no compressed data: nothing to do. */
1044 for (y = 0; y < height + 2; y++)
1045 memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags));
1047 cblk->data[cblk->length] = 0xff;
1048 cblk->data[cblk->length+1] = 0xff;
1049 ff_mqc_initdec(&t1->mqc, cblk->data);
1054 decode_sigpass(t1, width, height, bpno + 1, bandpos,
1055 bpass_csty_symbol && (clnpass_cnt >= 4),
1056 vert_causal_ctx_csty_symbol);
1059 decode_refpass(t1, width, height, bpno + 1);
1060 if (bpass_csty_symbol && clnpass_cnt >= 4)
1061 ff_mqc_initdec(&t1->mqc, cblk->data);
1064 decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
1065 codsty->cblk_style & JPEG2000_CBLK_SEGSYM,
1066 vert_causal_ctx_csty_symbol);
1067 clnpass_cnt = clnpass_cnt + 1;
1068 if (bpass_csty_symbol && clnpass_cnt >= 4)
1069 ff_mqc_initdec(&t1->mqc, cblk->data);
1082 /* TODO: Verify dequantization for lossless case
1083 * comp->data can be float or int
1084 * band->stepsize can be float or int
1085 * depending on the type of DWT transformation.
1086 * see ISO/IEC 15444-1:2002 A.6.1 */
1088 /* Float dequantization of a codeblock.*/
1089 static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
1090 Jpeg2000Component *comp,
1091 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1094 int w = cblk->coord[0][1] - cblk->coord[0][0];
1095 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1096 float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1097 int *src = t1->data[j];
1098 for (i = 0; i < w; ++i)
1099 datap[i] = src[i] * band->f_stepsize;
1103 /* Integer dequantization of a codeblock.*/
1104 static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
1105 Jpeg2000Component *comp,
1106 Jpeg2000T1Context *t1, Jpeg2000Band *band)
1109 int w = cblk->coord[0][1] - cblk->coord[0][0];
1110 for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
1111 int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
1112 int *src = t1->data[j];
1113 for (i = 0; i < w; ++i)
1114 datap[i] = (src[i] * band->i_stepsize + (1 << 14)) >> 15;
1118 /* Inverse ICT parameters in float and integer.
1119 * int value = (float value) * (1<<16) */
1120 static const float f_ict_params[4] = {
1126 static const int i_ict_params[4] = {
1133 static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
1136 int32_t *src[3], i0, i1, i2;
1137 float *srcf[3], i0f, i1f, i2f;
1139 for (i = 0; i < 3; i++)
1140 if (tile->codsty[0].transform == FF_DWT97)
1141 srcf[i] = tile->comp[i].f_data;
1143 src [i] = tile->comp[i].i_data;
1145 for (i = 0; i < 2; i++)
1146 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
1148 switch (tile->codsty[0].transform) {
1150 for (i = 0; i < csize; i++) {
1151 i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
1152 i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
1153 - (f_ict_params[2] * *srcf[2]);
1154 i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
1161 for (i = 0; i < csize; i++) {
1162 i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
1163 i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
1164 - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
1165 i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
1172 for (i = 0; i < csize; i++) {
1173 i1 = *src[0] - (*src[2] + *src[1] >> 2);
1184 static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
1187 int compno, reslevelno, bandno;
1191 Jpeg2000T1Context t1;
1193 /* Loop on tile components */
1194 for (compno = 0; compno < s->ncomponents; compno++) {
1195 Jpeg2000Component *comp = tile->comp + compno;
1196 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1198 /* Loop on resolution levels */
1199 for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
1200 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
1202 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
1203 int nb_precincts, precno;
1204 Jpeg2000Band *band = rlevel->band + bandno;
1205 int cblkno = 0, bandpos;
1207 bandpos = bandno + (reslevelno > 0);
1209 if (band->coord[0][0] == band->coord[0][1] ||
1210 band->coord[1][0] == band->coord[1][1])
1213 nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
1214 /* Loop on precincts */
1215 for (precno = 0; precno < nb_precincts; precno++) {
1216 Jpeg2000Prec *prec = band->prec + precno;
1218 /* Loop on codeblocks */
1219 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
1221 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
1222 decode_cblk(s, codsty, &t1, cblk,
1223 cblk->coord[0][1] - cblk->coord[0][0],
1224 cblk->coord[1][1] - cblk->coord[1][0],
1227 x = cblk->coord[0][0];
1228 y = cblk->coord[1][0];
1230 if (codsty->transform == FF_DWT97)
1231 dequantization_float(x, y, cblk, comp, &t1, band);
1233 dequantization_int(x, y, cblk, comp, &t1, band);
1237 } /* end reslevel */
1240 ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data);
1243 /* inverse MCT transformation */
1244 if (tile->codsty[0].mct)
1245 mct_decode(s, tile);
1247 if (s->cdef[0] < 0) {
1248 for (x = 0; x < s->ncomponents; x++)
1250 if ((s->ncomponents & 1) == 0)
1251 s->cdef[s->ncomponents-1] = 0;
1254 if (s->precision <= 8) {
1255 for (compno = 0; compno < s->ncomponents; compno++) {
1256 Jpeg2000Component *comp = tile->comp + compno;
1257 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1258 float *datap = comp->f_data;
1259 int32_t *i_datap = comp->i_data;
1260 int cbps = s->cbps[compno];
1261 int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1262 int planar = !!picture->data[2];
1263 int pixelsize = planar ? 1 : s->ncomponents;
1267 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1270 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1271 line = picture->data[plane] + y * picture->linesize[plane];
1272 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1275 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1276 dst = line + x * pixelsize + compno*!planar;
1278 if (codsty->transform == FF_DWT97) {
1279 for (; x < w; x += s->cdx[compno]) {
1280 int val = lrintf(*datap) + (1 << (cbps - 1));
1281 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1282 val = av_clip(val, 0, (1 << cbps) - 1);
1283 *dst = val << (8 - cbps);
1288 for (; x < w; x += s->cdx[compno]) {
1289 int val = *i_datap + (1 << (cbps - 1));
1290 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1291 val = av_clip(val, 0, (1 << cbps) - 1);
1292 *dst = val << (8 - cbps);
1297 line += picture->linesize[plane];
1301 for (compno = 0; compno < s->ncomponents; compno++) {
1302 Jpeg2000Component *comp = tile->comp + compno;
1303 Jpeg2000CodingStyle *codsty = tile->codsty + compno;
1304 float *datap = comp->f_data;
1305 int32_t *i_datap = comp->i_data;
1307 int cbps = s->cbps[compno];
1308 int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
1309 int planar = !!picture->data[2];
1310 int pixelsize = planar ? 1 : s->ncomponents;
1314 plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
1316 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
1317 linel = (uint16_t *)picture->data[plane] + y * (picture->linesize[plane] >> 1);
1318 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
1321 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
1322 dst = linel + (x * pixelsize + compno*!planar);
1323 if (codsty->transform == FF_DWT97) {
1324 for (; x < w; x += s-> cdx[compno]) {
1325 int val = lrintf(*datap) + (1 << (cbps - 1));
1326 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1327 val = av_clip(val, 0, (1 << cbps) - 1);
1328 /* align 12 bit values in little-endian mode */
1329 *dst = val << (16 - cbps);
1334 for (; x < w; x += s-> cdx[compno]) {
1335 int val = *i_datap + (1 << (cbps - 1));
1336 /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
1337 val = av_clip(val, 0, (1 << cbps) - 1);
1338 /* align 12 bit values in little-endian mode */
1339 *dst = val << (16 - cbps);
1344 linel += picture->linesize[plane] >> 1;
1352 static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
1355 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1356 if (s->tile[tileno].comp) {
1357 for (compno = 0; compno < s->ncomponents; compno++) {
1358 Jpeg2000Component *comp = s->tile[tileno].comp + compno;
1359 Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
1361 ff_jpeg2000_cleanup(comp, codsty);
1363 av_freep(&s->tile[tileno].comp);
1367 s->numXtiles = s->numYtiles = 0;
1370 static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
1372 Jpeg2000CodingStyle *codsty = s->codsty;
1373 Jpeg2000QuantStyle *qntsty = s->qntsty;
1374 uint8_t *properties = s->properties;
1381 if (bytestream2_get_bytes_left(&s->g) < 2) {
1382 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
1386 marker = bytestream2_get_be16u(&s->g);
1387 oldpos = bytestream2_tell(&s->g);
1389 if (marker == JPEG2000_SOD) {
1391 Jpeg2000TilePart *tp;
1393 if (s->curtileno < 0) {
1394 av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n");
1395 return AVERROR_INVALIDDATA;
1398 tile = s->tile + s->curtileno;
1399 tp = tile->tile_part + tile->tp_idx;
1400 if (tp->tp_end < s->g.buffer) {
1401 av_log(s->avctx, AV_LOG_ERROR, "Invalid tpend\n");
1402 return AVERROR_INVALIDDATA;
1404 bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer);
1405 bytestream2_skip(&s->g, tp->tp_end - s->g.buffer);
1409 if (marker == JPEG2000_EOC)
1412 len = bytestream2_get_be16(&s->g);
1413 if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2)
1414 return AVERROR_INVALIDDATA;
1420 s->numXtiles = s->numYtiles = 0;
1423 ret = get_coc(s, codsty, properties);
1426 ret = get_cod(s, codsty, properties);
1429 ret = get_qcc(s, len, qntsty, properties);
1432 ret = get_qcd(s, len, qntsty, properties);
1435 if (!(ret = get_sot(s, len))) {
1436 av_assert1(s->curtileno >= 0);
1437 codsty = s->tile[s->curtileno].codsty;
1438 qntsty = s->tile[s->curtileno].qntsty;
1439 properties = s->tile[s->curtileno].properties;
1443 // the comment is ignored
1444 bytestream2_skip(&s->g, len - 2);
1447 // Tile-part lengths
1448 ret = get_tlm(s, len);
1451 av_log(s->avctx, AV_LOG_ERROR,
1452 "unsupported marker 0x%.4X at pos 0x%X\n",
1453 marker, bytestream2_tell(&s->g) - 4);
1454 bytestream2_skip(&s->g, len - 2);
1457 if (bytestream2_tell(&s->g) - oldpos != len || ret) {
1458 av_log(s->avctx, AV_LOG_ERROR,
1459 "error during processing marker segment %.4x\n", marker);
1460 return ret ? ret : -1;
1466 /* Read bit stream packets --> T2 operation. */
1467 static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
1472 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
1473 Jpeg2000Tile *tile = s->tile + tileno;
1475 if (ret = init_tile(s, tileno))
1478 s->g = tile->tile_part[0].tpg;
1479 if (ret = jpeg2000_decode_packets(s, tile))
1486 static int jp2_find_codestream(Jpeg2000DecoderContext *s)
1488 uint32_t atom_size, atom, atom_end;
1489 int search_range = 10;
1493 bytestream2_get_bytes_left(&s->g) >= 8) {
1494 atom_size = bytestream2_get_be32u(&s->g);
1495 atom = bytestream2_get_be32u(&s->g);
1496 atom_end = bytestream2_tell(&s->g) + atom_size - 8;
1498 if (atom == JP2_CODESTREAM)
1501 if (bytestream2_get_bytes_left(&s->g) < atom_size || atom_end < atom_size)
1504 if (atom == JP2_HEADER &&
1506 uint32_t atom2_size, atom2, atom2_end;
1508 atom2_size = bytestream2_get_be32u(&s->g);
1509 atom2 = bytestream2_get_be32u(&s->g);
1510 atom2_end = bytestream2_tell(&s->g) + atom2_size - 8;
1511 if (atom2_size < 8 || atom2_end > atom_end || atom2_end < atom2_size)
1513 if (atom2 == JP2_CODESTREAM) {
1515 } else if (atom2 == MKBETAG('c','o','l','r') && atom2_size >= 7) {
1516 int method = bytestream2_get_byteu(&s->g);
1517 bytestream2_skipu(&s->g, 2);
1519 s->colour_space = bytestream2_get_be32u(&s->g);
1521 } else if (atom2 == MKBETAG('p','c','l','r') && atom2_size >= 6) {
1522 int i, size, colour_count, colour_channels, colour_depth[3];
1524 colour_count = bytestream2_get_be16u(&s->g);
1525 colour_channels = bytestream2_get_byteu(&s->g);
1526 // FIXME: Do not ignore channel_sign
1527 colour_depth[0] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1528 colour_depth[1] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1529 colour_depth[2] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
1530 size = (colour_depth[0] + 7 >> 3) * colour_count +
1531 (colour_depth[1] + 7 >> 3) * colour_count +
1532 (colour_depth[2] + 7 >> 3) * colour_count;
1533 if (colour_count > 256 ||
1534 colour_channels != 3 ||
1535 colour_depth[0] > 16 ||
1536 colour_depth[1] > 16 ||
1537 colour_depth[2] > 16 ||
1538 atom2_size < size) {
1539 avpriv_request_sample(s->avctx, "Unknown palette");
1540 bytestream2_seek(&s->g, atom2_end, SEEK_SET);
1544 for (i = 0; i < colour_count; i++) {
1545 if (colour_depth[0] <= 8) {
1546 r = bytestream2_get_byteu(&s->g) << 8 - colour_depth[0];
1547 r |= r >> colour_depth[0];
1549 r = bytestream2_get_be16u(&s->g) >> colour_depth[0] - 8;
1551 if (colour_depth[1] <= 8) {
1552 g = bytestream2_get_byteu(&s->g) << 8 - colour_depth[1];
1553 r |= r >> colour_depth[1];
1555 g = bytestream2_get_be16u(&s->g) >> colour_depth[1] - 8;
1557 if (colour_depth[2] <= 8) {
1558 b = bytestream2_get_byteu(&s->g) << 8 - colour_depth[2];
1559 r |= r >> colour_depth[2];
1561 b = bytestream2_get_be16u(&s->g) >> colour_depth[2] - 8;
1563 s->palette[i] = 0xffu << 24 | r << 16 | g << 8 | b;
1565 } else if (atom2 == MKBETAG('c','d','e','f') && atom2_size >= 2) {
1566 int n = bytestream2_get_be16u(&s->g);
1568 int cn = bytestream2_get_be16(&s->g);
1569 int av_unused typ = bytestream2_get_be16(&s->g);
1570 int asoc = bytestream2_get_be16(&s->g);
1571 if (cn < 4 || asoc < 4)
1575 bytestream2_seek(&s->g, atom2_end, SEEK_SET);
1576 } while (atom_end - atom2_end >= 8);
1580 bytestream2_seek(&s->g, atom_end, SEEK_SET);
1586 static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
1587 int *got_frame, AVPacket *avpkt)
1589 Jpeg2000DecoderContext *s = avctx->priv_data;
1590 ThreadFrame frame = { .f = data };
1591 AVFrame *picture = data;
1595 bytestream2_init(&s->g, avpkt->data, avpkt->size);
1597 memset(s->cdef, -1, sizeof(s->cdef));
1599 if (bytestream2_get_bytes_left(&s->g) < 2) {
1600 ret = AVERROR_INVALIDDATA;
1604 // check if the image is in jp2 format
1605 if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1606 (bytestream2_get_be32u(&s->g) == 12) &&
1607 (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1608 (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
1609 if (!jp2_find_codestream(s)) {
1610 av_log(avctx, AV_LOG_ERROR,
1611 "Could not find Jpeg2000 codestream atom.\n");
1612 ret = AVERROR_INVALIDDATA;
1616 bytestream2_seek(&s->g, 0, SEEK_SET);
1619 while (bytestream2_get_bytes_left(&s->g) >= 3 && bytestream2_peek_be16(&s->g) != JPEG2000_SOC)
1620 bytestream2_skip(&s->g, 1);
1622 if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
1623 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1624 ret = AVERROR_INVALIDDATA;
1627 if (ret = jpeg2000_read_main_headers(s))
1630 /* get picture buffer */
1631 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1633 picture->pict_type = AV_PICTURE_TYPE_I;
1634 picture->key_frame = 1;
1636 if (ret = jpeg2000_read_bitstream_packets(s))
1639 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1640 if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
1643 jpeg2000_dec_cleanup(s);
1647 if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
1648 memcpy(picture->data[1], s->palette, 256 * sizeof(uint32_t));
1650 return bytestream2_tell(&s->g);
1653 jpeg2000_dec_cleanup(s);
1657 static void jpeg2000_init_static_data(AVCodec *codec)
1659 ff_jpeg2000_init_tier1_luts();
1660 ff_mqc_init_context_tables();
1663 #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
1664 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1666 static const AVOption options[] = {
1667 { "lowres", "Lower the decoding resolution by a power of two",
1668 OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
1672 static const AVProfile profiles[] = {
1673 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
1674 { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
1675 { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
1676 { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
1677 { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
1678 { FF_PROFILE_UNKNOWN },
1681 static const AVClass jpeg2000_class = {
1682 .class_name = "jpeg2000",
1683 .item_name = av_default_item_name,
1685 .version = LIBAVUTIL_VERSION_INT,
1688 AVCodec ff_jpeg2000_decoder = {
1690 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
1691 .type = AVMEDIA_TYPE_VIDEO,
1692 .id = AV_CODEC_ID_JPEG2000,
1693 .capabilities = CODEC_CAP_FRAME_THREADS,
1694 .priv_data_size = sizeof(Jpeg2000DecoderContext),
1695 .init_static_data = jpeg2000_init_static_data,
1696 .decode = jpeg2000_decode_frame,
1697 .priv_class = &jpeg2000_class,
1699 .profiles = NULL_IF_CONFIG_SMALL(profiles)