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FFmpeg/libavcodec/j2kdec.c

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  1. /*

  2.  * JPEG 2000 image decoder

  3.  * Copyright (c) 2007 Kamil Nowosad

  4.  * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  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.

  12.  *

  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.

  17.  *

  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

  21.  */

  22. 

  23. /**

  24.  * JPEG2000 image decoder

  25.  * @file

  26.  * @author Kamil Nowosad

  27.  */

  28. 

  29. // #define DEBUG

  30. 

  31. #include "avcodec.h"

  32. #include "bytestream.h"

  33. #include "internal.h"

  34. #include "thread.h"

  35. #include "j2k.h"

  36. #include "libavutil/common.h"

  37. 

  38. #define JP2_SIG_TYPE    0x6A502020

  39. #define JP2_SIG_VALUE   0x0D0A870A

  40. #define JP2_CODESTREAM  0x6A703263

  41. 

  42. #define HAD_COC 0x01

  43. #define HAD_QCC 0x02

  44. 

  45. typedef struct {

  46.    Jpeg2000Component *comp;

  47.    uint8_t properties[4];

  48.    Jpeg2000CodingStyle codsty[4];

  49.    Jpeg2000QuantStyle  qntsty[4];

  50. } Jpeg2000Tile;

  51. 

  52. typedef struct Jpeg2000DecoderContext {

  53.     AVCodecContext  *avctx;

  54.     AVFrame         *picture;

  55.     GetByteContext  g;

  56. 

  57.     int             width, height;

  58.     int             image_offset_x, image_offset_y;

  59.     int             tile_offset_x, tile_offset_y;

  60.     uint8_t         cbps[4];    // bits per sample in particular components

  61.     uint8_t         sgnd[4];    // if a component is signed

  62.     uint8_t         properties[4];

  63.     int             cdx[4], cdy[4];

  64.     int             precision;

  65.     int             ncomponents;

  66.     int             tile_width, tile_height;

  67.     int             numXtiles, numYtiles;

  68.     int             maxtilelen;

  69. 

  70.     Jpeg2000CodingStyle codsty[4];

  71.     Jpeg2000QuantStyle  qntsty[4];

  72. 

  73.     int             bit_index;

  74. 

  75.     int             curtileno;

  76. 

  77.     Jpeg2000Tile    *tile;

  78. } Jpeg2000DecoderContext;

  79. 

  80. static int get_bits(Jpeg2000DecoderContext *s, int n)

  81. {

  82.     int res = 0;

  83. 

  84.     while (--n >= 0) {

  85.         res <<= 1;

  86.         if (s->bit_index == 0) {

  87.             s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);

  88.         }

  89.         s->bit_index--;

  90.         res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;

  91.     }

  92.     return res;

  93. }

  94. 

  95. static void j2k_flush(Jpeg2000DecoderContext *s)

  96. {

  97.     if (bytestream2_get_byte(&s->g) == 0xff)

  98.         bytestream2_skip(&s->g, 1);

  99.     s->bit_index = 8;

  100. }

  101. 

  102. /** decode the value stored in node */

  103. static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node, int threshold)

  104. {

  105.     Jpeg2000TgtNode *stack[30];

  106.     int sp = -1, curval = 0;

  107. 

  108.     if (!node)

  109.         return AVERROR(EINVAL);

  110. 

  111.     while (node && !node->vis) {

  112.         stack[++sp] = node;

  113.         node = node->parent;

  114.     }

  115. 

  116.     if (node)

  117.         curval = node->val;

  118.     else

  119.         curval = stack[sp]->val;

  120. 

  121.     while (curval < threshold && sp >= 0) {

  122.         if (curval < stack[sp]->val)

  123.             curval = stack[sp]->val;

  124.         while (curval < threshold) {

  125.             int ret;

  126.             if ((ret = get_bits(s, 1)) > 0) {

  127.                 stack[sp]->vis++;

  128.                 break;

  129.             } else if (!ret)

  130.                 curval++;

  131.             else

  132.                 return ret;

  133.         }

  134.         stack[sp]->val = curval;

  135.         sp--;

  136.     }

  137.     return curval;

  138. }

  139. 

  140. /* marker segments */

  141. /* get sizes and offsets of image, tiles; number of components */

  142. static int get_siz(Jpeg2000DecoderContext *s)

  143. {

  144.     int i, ret;

  145.     ThreadFrame frame = { .f = s->picture };

  146. 

  147.     if (bytestream2_get_bytes_left(&s->g) < 36)

  148.         return AVERROR(EINVAL);

  149. 

  150.     s->avctx->profile = bytestream2_get_be16u(&s->g); // Rsiz

  151.     s->width          = bytestream2_get_be32u(&s->g); // Width

  152.     s->height         = bytestream2_get_be32u(&s->g); // Height

  153.     s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz

  154.     s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz

  155.     s->tile_width     = bytestream2_get_be32u(&s->g); // XTSiz

  156.     s->tile_height    = bytestream2_get_be32u(&s->g); // YTSiz

  157.     s->tile_offset_x  = bytestream2_get_be32u(&s->g); // XT0Siz

  158.     s->tile_offset_y  = bytestream2_get_be32u(&s->g); // YT0Siz

  159.     s->ncomponents    = bytestream2_get_be16u(&s->g); // CSiz

  160. 

  161.     if (s->ncomponents <= 0 || s->ncomponents > 4) {

  162.         av_log(s->avctx, AV_LOG_ERROR, "unsupported/invalid ncomponents: %d\n", s->ncomponents);

  163.         return AVERROR(EINVAL);

  164.     }

  165.     if (s->tile_width<=0 || s->tile_height<=0)

  166.         return AVERROR(EINVAL);

  167. 

  168.     if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents)

  169.         return AVERROR(EINVAL);

  170. 

  171.     for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i

  172.         uint8_t x = bytestream2_get_byteu(&s->g);

  173.         s->cbps[i] = (x & 0x7f) + 1;

  174.         s->precision = FFMAX(s->cbps[i], s->precision);

  175.         s->sgnd[i] = !!(x & 0x80);

  176.         s->cdx[i] = bytestream2_get_byteu(&s->g);

  177.         s->cdy[i] = bytestream2_get_byteu(&s->g);

  178.     }

  179. 

  180.     s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);

  181.     s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);

  182. 

  183.     if (s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(Jpeg2000Tile))

  184.         return AVERROR(EINVAL);

  185. 

  186.     s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(Jpeg2000Tile));

  187.     if (!s->tile)

  188.         return AVERROR(ENOMEM);

  189. 

  190.     for (i = 0; i < s->numXtiles * s->numYtiles; i++) {

  191.         Jpeg2000Tile *tile = s->tile + i;

  192. 

  193.         tile->comp = av_mallocz(s->ncomponents * sizeof(Jpeg2000Component));

  194.         if (!tile->comp)

  195.             return AVERROR(ENOMEM);

  196.     }

  197. 

  198.     s->avctx->width  = s->width  - s->image_offset_x;

  199.     s->avctx->height = s->height - s->image_offset_y;

  200. 

  201.     switch(s->ncomponents) {

  202.     case 1:

  203.         if (s->precision > 8) {

  204.             s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;

  205.         } else {

  206.             s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;

  207.         }

  208.         break;

  209.     case 3:

  210.         if (s->precision > 8) {

  211.             s->avctx->pix_fmt = AV_PIX_FMT_RGB48;

  212.         } else {

  213.             s->avctx->pix_fmt = AV_PIX_FMT_RGB24;

  214.         }

  215.         break;

  216.     case 4:

  217.         s->avctx->pix_fmt = AV_PIX_FMT_RGBA;

  218.         break;

  219.     }

  220. 

  221. 

  222.     if ((ret = ff_thread_get_buffer(s->avctx, &frame, 0)) < 0)

  223.         return ret;

  224. 

  225.     s->picture->pict_type = AV_PICTURE_TYPE_I;

  226.     s->picture->key_frame = 1;

  227. 

  228.     return 0;

  229. }

  230. 

  231. /** get common part for COD and COC segments */

  232. static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)

  233. {

  234.     if (bytestream2_get_bytes_left(&s->g) < 5)

  235.         return AVERROR(EINVAL);

  236.           c->nreslevels = bytestream2_get_byteu(&s->g) + 1; // num of resolution levels - 1

  237.      c->log2_cblk_width = bytestream2_get_byteu(&s->g) + 2; // cblk width

  238.     c->log2_cblk_height = bytestream2_get_byteu(&s->g) + 2; // cblk height

  239. 

  240.     c->cblk_style = bytestream2_get_byteu(&s->g);

  241.     if (c->cblk_style != 0) { // cblk style

  242.         av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);

  243.     }

  244.     c->transform = bytestream2_get_byteu(&s->g); // transformation

  245.     if (c->csty & JPEG2000_CSTY_PREC) {

  246.         int i;

  247. 

  248.         for (i = 0; i < c->nreslevels; i++)

  249.             bytestream2_get_byte(&s->g);

  250.     }

  251.     return 0;

  252. }

  253. 

  254. /** get coding parameters for a particular tile or whole image*/

  255. static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)

  256. {

  257.     Jpeg2000CodingStyle tmp;

  258.     int compno;

  259. 

  260.     if (bytestream2_get_bytes_left(&s->g) < 5)

  261.         return AVERROR(EINVAL);

  262. 

  263.     tmp.log2_prec_width  =

  264.     tmp.log2_prec_height = 15;

  265. 

  266.     tmp.csty = bytestream2_get_byteu(&s->g);

  267. 

  268.     // get progression order

  269.     tmp.prog_order = bytestream2_get_byteu(&s->g);

  270.     if (tmp.prog_order) {

  271.         av_log(s->avctx, AV_LOG_ERROR, "only LRCP progression supported\n");

  272.     }

  273. 

  274.     tmp.nlayers = bytestream2_get_be16u(&s->g);

  275.         tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation

  276. 

  277.     get_cox(s, &tmp);

  278.     for (compno = 0; compno < s->ncomponents; compno++) {

  279.         if (!(properties[compno] & HAD_COC))

  280.             memcpy(c + compno, &tmp, sizeof(Jpeg2000CodingStyle));

  281.     }

  282.     return 0;

  283. }

  284. 

  285. /** get coding parameters for a component in the whole image on a particular tile */

  286. static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)

  287. {

  288.     int compno;

  289. 

  290.     if (bytestream2_get_bytes_left(&s->g) < 2)

  291.         return AVERROR(EINVAL);

  292. 

  293.     compno = bytestream2_get_byteu(&s->g);

  294. 

  295.     c += compno;

  296.     c->csty = bytestream2_get_byte(&s->g);

  297.     get_cox(s, c);

  298. 

  299.     properties[compno] |= HAD_COC;

  300.     return 0;

  301. }

  302. 

  303. /** get common part for QCD and QCC segments */

  304. static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)

  305. {

  306.     int i, x;

  307. 

  308.     if (bytestream2_get_bytes_left(&s->g) < 1)

  309.         return AVERROR(EINVAL);

  310. 

  311.     x = bytestream2_get_byteu(&s->g); // Sqcd

  312. 

  313.     q->nguardbits = x >> 5;

  314.       q->quantsty = x & 0x1f;

  315. 

  316.     if (q->quantsty == JPEG2000_QSTY_NONE) {

  317.         n -= 3;

  318.         if (bytestream2_get_bytes_left(&s->g) < n || 32*3 < n)

  319.             return AVERROR(EINVAL);

  320.         for (i = 0; i < n; i++)

  321.             q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;

  322.     } else if (q->quantsty == JPEG2000_QSTY_SI) {

  323.         if (bytestream2_get_bytes_left(&s->g) < 2)

  324.             return AVERROR(EINVAL);

  325.         x = bytestream2_get_be16u(&s->g);

  326.         q->expn[0] = x >> 11;

  327.         q->mant[0] = x & 0x7ff;

  328.         for (i = 1; i < 32 * 3; i++) {

  329.             int curexpn = FFMAX(0, q->expn[0] - (i-1)/3);

  330.             q->expn[i] = curexpn;

  331.             q->mant[i] = q->mant[0];

  332.         }

  333.     } else{

  334.         n = (n - 3) >> 1;

  335.         if (bytestream2_get_bytes_left(&s->g) < 2 * n || 32*3 < n)

  336.             return AVERROR(EINVAL);

  337.         for (i = 0; i < n; i++) {

  338.             x = bytestream2_get_be16u(&s->g);

  339.             q->expn[i] = x >> 11;

  340.             q->mant[i] = x & 0x7ff;

  341.         }

  342.     }

  343.     return 0;

  344. }

  345. 

  346. /** get quantization parameters for a particular tile or a whole image */

  347. static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)

  348. {

  349.     Jpeg2000QuantStyle tmp;

  350.     int compno;

  351. 

  352.     if (get_qcx(s, n, &tmp))

  353.         return -1;

  354.     for (compno = 0; compno < s->ncomponents; compno++)

  355.         if (!(properties[compno] & HAD_QCC))

  356.             memcpy(q + compno, &tmp, sizeof(Jpeg2000QuantStyle));

  357.     return 0;

  358. }

  359. 

  360. /** get quantization parameters for a component in the whole image on in a particular tile */

  361. static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)

  362. {

  363.     int compno;

  364. 

  365.     if (bytestream2_get_bytes_left(&s->g) < 1)

  366.         return AVERROR(EINVAL);

  367. 

  368.     compno = bytestream2_get_byteu(&s->g);

  369.     properties[compno] |= HAD_QCC;

  370.     return get_qcx(s, n-1, q+compno);

  371. }

  372. 

  373. /** get start of tile segment */

  374. static int get_sot(Jpeg2000DecoderContext *s)

  375. {

  376.     if (bytestream2_get_bytes_left(&s->g) < 8)

  377.         return AVERROR(EINVAL);

  378. 

  379.     s->curtileno = bytestream2_get_be16u(&s->g); ///< Isot

  380.     if ((unsigned)s->curtileno >= s->numXtiles * s->numYtiles) {

  381.         s->curtileno=0;

  382.         return AVERROR(EINVAL);

  383.     }

  384. 

  385.     bytestream2_skipu(&s->g, 4); ///< Psot (ignored)

  386. 

  387.     if (!bytestream2_get_byteu(&s->g)) { ///< TPsot

  388.         Jpeg2000Tile *tile = s->tile + s->curtileno;

  389. 

  390.         /* copy defaults */

  391.         memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));

  392.         memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));

  393.     }

  394.     bytestream2_get_byteu(&s->g); ///< TNsot

  395. 

  396.     return 0;

  397. }

  398. 

  399. static int init_tile(Jpeg2000DecoderContext *s, int tileno)

  400. {

  401.     int compno,

  402.         tilex = tileno % s->numXtiles,

  403.         tiley = tileno / s->numXtiles;

  404.     Jpeg2000Tile *tile = s->tile + tileno;

  405. 

  406.     if (!tile->comp)

  407.         return AVERROR(ENOMEM);

  408.     for (compno = 0; compno < s->ncomponents; compno++) {

  409.         Jpeg2000Component *comp = tile->comp + compno;

  410.         Jpeg2000CodingStyle *codsty = tile->codsty + compno;

  411.         Jpeg2000QuantStyle  *qntsty = tile->qntsty + compno;

  412.         int ret; // global bandno

  413. 

  414.         comp->coord[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);

  415.         comp->coord[0][1] = FFMIN((tilex+1)*s->tile_width + s->tile_offset_x, s->width);

  416.         comp->coord[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);

  417.         comp->coord[1][1] = FFMIN((tiley+1)*s->tile_height + s->tile_offset_y, s->height);

  418. 

  419.         if (ret = ff_j2k_init_component(comp, codsty, qntsty, s->cbps[compno], s->cdx[compno], s->cdy[compno]))

  420.             return ret;

  421.     }

  422.     return 0;

  423. }

  424. 

  425. /** read the number of coding passes */

  426. static int getnpasses(Jpeg2000DecoderContext *s)

  427. {

  428.     int num;

  429.     if (!get_bits(s, 1))

  430.         return 1;

  431.     if (!get_bits(s, 1))

  432.         return 2;

  433.     if ((num = get_bits(s, 2)) != 3)

  434.         return num < 0 ? num : 3 + num;

  435.     if ((num = get_bits(s, 5)) != 31)

  436.         return num < 0 ? num : 6 + num;

  437.     num = get_bits(s, 7);

  438.     return num < 0 ? num : 37 + num;

  439. }

  440. 

  441. static int getlblockinc(Jpeg2000DecoderContext *s)

  442. {

  443.     int res = 0, ret;

  444.     while (ret = get_bits(s, 1)) {

  445.         if (ret < 0)

  446.             return ret;

  447.         res++;

  448.     }

  449.     return res;

  450. }

  451. 

  452. static int decode_packet(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000ResLevel *rlevel, int precno,

  453.                          int layno, uint8_t *expn, int numgbits)

  454. {

  455.     int bandno, cblkny, cblknx, cblkno, ret;

  456. 

  457.     if (!(ret = get_bits(s, 1))) {

  458.         j2k_flush(s);

  459.         return 0;

  460.     } else if (ret < 0)

  461.         return ret;

  462. 

  463.     for (bandno = 0; bandno < rlevel->nbands; bandno++) {

  464.         Jpeg2000Band *band = rlevel->band + bandno;

  465.         Jpeg2000Prec *prec = band->prec + precno;

  466.         int pos = 0;

  467. 

  468.         if (band->coord[0][0] == band->coord[0][1]

  469.         ||  band->coord[1][0] == band->coord[1][1])

  470.             continue;

  471. 

  472.         for (cblkny = prec->yi0; cblkny < prec->yi1; cblkny++)

  473.             for (cblknx = prec->xi0, cblkno = cblkny * band->cblknx + cblknx; cblknx < prec->xi1; cblknx++, cblkno++, pos++) {

  474.                 Jpeg2000Cblk *cblk = band->cblk + cblkno;

  475.                 int incl, newpasses, llen;

  476. 

  477.                 if (cblk->npasses)

  478.                     incl = get_bits(s, 1);

  479.                 else

  480.                     incl = tag_tree_decode(s, prec->cblkincl + pos, layno+1) == layno;

  481.                 if (!incl)

  482.                     continue;

  483.                 else if (incl < 0)

  484.                     return incl;

  485. 

  486.                 if (!cblk->npasses)

  487.                     cblk->nonzerobits = expn[bandno] + numgbits - 1 - tag_tree_decode(s, prec->zerobits + pos, 100);

  488.                 if ((newpasses = getnpasses(s)) < 0)

  489.                     return newpasses;

  490.                 if ((llen = getlblockinc(s)) < 0)

  491.                     return llen;

  492.                 cblk->lblock += llen;

  493.                 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)

  494.                     return ret;

  495.                 cblk->lengthinc = ret;

  496.                 cblk->npasses += newpasses;

  497.             }

  498.     }

  499.     j2k_flush(s);

  500. 

  501.     if (codsty->csty & JPEG2000_CSTY_EPH) {

  502.         if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH) {

  503.             bytestream2_skip(&s->g, 2);

  504.         } else {

  505.             av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");

  506.         }

  507.     }

  508. 

  509.     for (bandno = 0; bandno < rlevel->nbands; bandno++) {

  510.         Jpeg2000Band *band = rlevel->band + bandno;

  511.         int yi, cblknw = band->prec[precno].xi1 - band->prec[precno].xi0;

  512.         for (yi = band->prec[precno].yi0; yi < band->prec[precno].yi1; yi++) {

  513.             int xi;

  514.             for (xi = band->prec[precno].xi0; xi < band->prec[precno].xi1; xi++) {

  515.                 Jpeg2000Cblk *cblk = band->cblk + yi * cblknw + xi;

  516.                 if (   bytestream2_get_bytes_left(&s->g) < cblk->lengthinc

  517.                     || sizeof(cblk->data) < cblk->lengthinc

  518.                 )

  519.                     return AVERROR(EINVAL);

  520.                 bytestream2_get_bufferu(&s->g, cblk->data, cblk->lengthinc);

  521.                 cblk->length += cblk->lengthinc;

  522.                 cblk->lengthinc = 0;

  523.             }

  524.         }

  525.     }

  526.     return 0;

  527. }

  528. 

  529. static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)

  530. {

  531.     int layno, reslevelno, compno, precno, ok_reslevel;

  532.     s->bit_index = 8;

  533.     for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {

  534.         ok_reslevel = 1;

  535.         for (reslevelno = 0; ok_reslevel; reslevelno++) {

  536.             ok_reslevel = 0;

  537.             for (compno = 0; compno < s->ncomponents; compno++) {

  538.                 Jpeg2000CodingStyle *codsty = tile->codsty + compno;

  539.                 Jpeg2000QuantStyle  *qntsty = tile->qntsty + compno;

  540.                 if (reslevelno < codsty->nreslevels) {

  541.                     Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;

  542.                     ok_reslevel = 1;

  543.                     for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) {

  544.                         if (decode_packet(s, codsty, rlevel, precno, layno, qntsty->expn +

  545.                                           (reslevelno ? 3*(reslevelno-1)+1 : 0), qntsty->nguardbits))

  546.                             return -1;

  547.                     }

  548.                 }

  549.             }

  550.         }

  551.     }

  552.     return 0;

  553. }

  554. 

  555. /* TIER-1 routines */

  556. static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height, int bpno, int bandno, int bpass_csty_symbol,

  557.                            int vert_causal_ctx_csty_symbol)

  558. {

  559.     int mask = 3 << (bpno - 1), y0, x, y;

  560. 

  561.     for (y0 = 0; y0 < height; y0 += 4)

  562.         for (x = 0; x < width; x++)

  563.             for (y = y0; y < height && y < y0+4; y++) {

  564.                 if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)

  565.                 && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {

  566.                     int flags_mask = -1;

  567.                     if (vert_causal_ctx_csty_symbol && y == y0 + 3)

  568.                         flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);

  569.                     if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {

  570.                         int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);

  571.                         if (bpass_csty_symbol)

  572.                              t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;

  573.                         else

  574.                              t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?

  575.                                                -mask : mask;

  576. 

  577.                         ff_j2k_set_significant(t1, x, y, t1->data[y][x] < 0);

  578.                     }

  579.                     t1->flags[y+1][x+1] |= JPEG2000_T1_VIS;

  580.                 }

  581.             }

  582. }

  583. 

  584. static void decode_refpass(Jpeg2000T1Context *t1, int width, int height, int bpno)

  585. {

  586.     int phalf, nhalf;

  587.     int y0, x, y;

  588. 

  589.     phalf = 1 << (bpno - 1);

  590.     nhalf = -phalf;

  591. 

  592.     for (y0 = 0; y0 < height; y0 += 4)

  593.         for (x = 0; x < width; x++)

  594.             for (y = y0; y < height && y < y0+4; y++) {

  595.                 if ((t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {

  596.                     int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y+1][x+1]);

  597.                     int r = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? phalf : nhalf;

  598.                     t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;

  599.                     t1->flags[y+1][x+1] |= JPEG2000_T1_REF;

  600.                 }

  601.             }

  602. }

  603. 

  604. static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1, int width, int height,

  605.                            int bpno, int bandno, int seg_symbols, int vert_causal_ctx_csty_symbol)

  606. {

  607.     int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;

  608. 

  609.     for (y0 = 0; y0 < height; y0 += 4) {

  610.         for (x = 0; x < width; x++) {

  611.             if (y0 + 3 < height && !(

  612.             (t1->flags[y0+1][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||

  613.             (t1->flags[y0+2][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||

  614.             (t1->flags[y0+3][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||

  615.             (t1->flags[y0+4][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {

  616.                 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))

  617.                     continue;

  618.                 runlen = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);

  619.                 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);

  620.                 dec = 1;

  621.             } else{

  622.                 runlen = 0;

  623.                 dec = 0;

  624.             }

  625. 

  626.             for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {

  627.                 if (!dec) {

  628.                     if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {

  629.                         int flags_mask = -1;

  630.                         if (vert_causal_ctx_csty_symbol && y == y0 + 3)

  631.                             flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);

  632.                         dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,

  633.                                                                                              bandno));

  634.                     }

  635.                 }

  636.                 if (dec) {

  637.                     int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);

  638.                     t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ? -mask : mask;

  639.                     ff_j2k_set_significant(t1, x, y, t1->data[y][x] < 0);

  640.                 }

  641.                 dec = 0;

  642.                 t1->flags[y+1][x+1] &= ~JPEG2000_T1_VIS;

  643.             }

  644.         }

  645.     }

  646.     if (seg_symbols) {

  647.         int val;

  648.         val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);

  649.         val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);

  650.         val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);

  651.         val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);

  652.         if (val != 0xa) {

  653.             av_log(s->avctx, AV_LOG_ERROR,"Segmentation symbol value incorrect\n");

  654.         }

  655.     }

  656. }

  657. 

  658. static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,

  659.                        int width, int height, int bandpos)

  660. {

  661.     int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y, clnpass_cnt = 0;

  662.     int bpass_csty_symbol = JPEG2000_CBLK_BYPASS & codsty->cblk_style;

  663.     int vert_causal_ctx_csty_symbol = JPEG2000_CBLK_VSC & codsty->cblk_style;

  664. 

  665.     for (y = 0; y < height+2; y++)

  666.         memset(t1->flags[y], 0, (width+2)*sizeof(int));

  667. 

  668.     for (y = 0; y < height; y++)

  669.         memset(t1->data[y], 0, width*sizeof(int));

  670. 

  671.     cblk->data[cblk->length] = 0xff;

  672.     cblk->data[cblk->length+1] = 0xff;

  673.     ff_mqc_initdec(&t1->mqc, cblk->data);

  674. 

  675.     while (passno--) {

  676.         switch(pass_t) {

  677.             case 0: decode_sigpass(t1, width, height, bpno+1, bandpos,

  678.                                   bpass_csty_symbol && (clnpass_cnt >= 4), vert_causal_ctx_csty_symbol);

  679.                     break;

  680.             case 1: decode_refpass(t1, width, height, bpno+1);

  681.                     if (bpass_csty_symbol && clnpass_cnt >= 4)

  682.                         ff_mqc_initdec(&t1->mqc, cblk->data);

  683.                     break;

  684.             case 2: decode_clnpass(s, t1, width, height, bpno+1, bandpos,

  685.                                    codsty->cblk_style & JPEG2000_CBLK_SEGSYM, vert_causal_ctx_csty_symbol);

  686.                     clnpass_cnt = clnpass_cnt + 1;

  687.                     if (bpass_csty_symbol && clnpass_cnt >= 4)

  688.                        ff_mqc_initdec(&t1->mqc, cblk->data);

  689.                     break;

  690.         }

  691. 

  692.         pass_t++;

  693.         if (pass_t == 3) {

  694.             bpno--;

  695.             pass_t = 0;

  696.         }

  697.     }

  698.     return 0;

  699. }

  700. 

  701. static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)

  702. {

  703.     int i, *src[3], i0, i1, i2, csize = 1;

  704. 

  705.     for (i = 0; i < 3; i++)

  706.         src[i] = tile->comp[i].data;

  707. 

  708.     for (i = 0; i < 2; i++)

  709.         csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];

  710. 

  711.     if (tile->codsty[0].transform == FF_DWT97) {

  712.         for (i = 0; i < csize; i++) {

  713.             i0 = *src[0] + (*src[2] * 46802 >> 16);

  714.             i1 = *src[0] - (*src[1] * 22553 + *src[2] * 46802 >> 16);

  715.             i2 = *src[0] + (116130 * *src[1] >> 16);

  716.             *src[0]++ = i0;

  717.             *src[1]++ = i1;

  718.             *src[2]++ = i2;

  719.         }

  720.     } else{

  721.         for (i = 0; i < csize; i++) {

  722.             i1 = *src[0] - (*src[2] + *src[1] >> 2);

  723.             i0 = i1 + *src[2];

  724.             i2 = i1 + *src[1];

  725.             *src[0]++ = i0;

  726.             *src[1]++ = i1;

  727.             *src[2]++ = i2;

  728.         }

  729.     }

  730. }

  731. 

  732. static int decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)

  733. {

  734.     int compno, reslevelno, bandno;

  735.     int x, y, *src[4];

  736.     uint8_t *line;

  737.     Jpeg2000T1Context t1;

  738. 

  739.     for (compno = 0; compno < s->ncomponents; compno++) {

  740.         Jpeg2000Component *comp     = tile->comp + compno;

  741.         Jpeg2000CodingStyle *codsty = tile->codsty + compno;

  742. 

  743.         for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {

  744.             Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;

  745.             for (bandno = 0; bandno < rlevel->nbands; bandno++) {

  746.                 Jpeg2000Band *band = rlevel->band + bandno;

  747.                 int cblkx, cblky, cblkno=0, xx0, x0, xx1, y0, yy0, yy1, bandpos;

  748. 

  749.                 bandpos = bandno + (reslevelno > 0);

  750. 

  751.                 yy0 = bandno == 0 ? 0 : comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];

  752.                 y0 = yy0;

  753.                 yy1 = FFMIN(ff_jpeg2000_ceildiv(band->coord[1][0] + 1, band->codeblock_height) * band->codeblock_height,

  754.                             band->coord[1][1]) - band->coord[1][0] + yy0;

  755. 

  756.                 if (band->coord[0][0] == band->coord[0][1] || band->coord[1][0] == band->coord[1][1])

  757.                     continue;

  758. 

  759.                 for (cblky = 0; cblky < band->cblkny; cblky++) {

  760.                     if (reslevelno == 0 || bandno == 1)

  761.                         xx0 = 0;

  762.                     else

  763.                         xx0 = comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];

  764.                     x0 = xx0;

  765.                     xx1 = FFMIN(ff_jpeg2000_ceildiv(band->coord[0][0] + 1, band->codeblock_width) * band->codeblock_width,

  766.                                 band->coord[0][1]) - band->coord[0][0] + xx0;

  767. 

  768.                     for (cblkx = 0; cblkx < band->cblknx; cblkx++, cblkno++) {

  769.                         int y, x;

  770.                         decode_cblk(s, codsty, &t1, band->cblk + cblkno, xx1 - xx0, yy1 - yy0, bandpos);

  771.                         if (codsty->transform == FF_DWT53) {

  772.                             for (y = yy0; y < yy1; y+=s->cdy[compno]) {

  773.                                 int *ptr = t1.data[y-yy0];

  774.                                 for (x = xx0; x < xx1; x+=s->cdx[compno]) {

  775.                                     comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = *ptr++ >> 1;

  776.                                 }

  777.                             }

  778.                         } else{

  779.                             for (y = yy0; y < yy1; y+=s->cdy[compno]) {

  780.                                 int *ptr = t1.data[y-yy0];

  781.                                 for (x = xx0; x < xx1; x+=s->cdx[compno]) {

  782.                                     int tmp = ((int64_t)*ptr++) * ((int64_t)band->stepsize) >> 13, tmp2;

  783.                                     tmp2 = FFABS(tmp>>1) + (tmp&1);

  784.                                     comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = tmp < 0 ? -tmp2 : tmp2;

  785.                                 }

  786.                             }

  787.                         }

  788.                         xx0 = xx1;

  789.                         xx1 = FFMIN(xx1 + band->codeblock_width, band->coord[0][1] - band->coord[0][0] + x0);

  790.                     }

  791.                     yy0 = yy1;

  792.                     yy1 = FFMIN(yy1 + band->codeblock_height, band->coord[1][1] - band->coord[1][0] + y0);

  793.                 }

  794.             }

  795.         }

  796.         ff_j2k_dwt_decode(&comp->dwt, comp->data);

  797.         src[compno] = comp->data;

  798.     }

  799.     if (tile->codsty[0].mct)

  800.         mct_decode(s, tile);

  801. 

  802.     if (s->precision <= 8) {

  803.         for (compno = 0; compno < s->ncomponents; compno++) {

  804.             y = tile->comp[compno].coord[1][0] - s->image_offset_y;

  805.             line = s->picture->data[0] + y * s->picture->linesize[0];

  806.             for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {

  807.                 uint8_t *dst;

  808. 

  809.                 x = tile->comp[compno].coord[0][0] - s->image_offset_x;

  810.                 dst = line + x * s->ncomponents + compno;

  811. 

  812.                 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) {

  813.                     *src[compno] += 1 << (s->cbps[compno]-1);

  814.                     if (*src[compno] < 0)

  815.                         *src[compno] = 0;

  816.                     else if (*src[compno] >= (1 << s->cbps[compno]))

  817.                         *src[compno] = (1 << s->cbps[compno]) - 1;

  818.                     *dst = *src[compno]++;

  819.                     dst += s->ncomponents;

  820.                 }

  821.                 line += s->picture->linesize[0];

  822.             }

  823.         }

  824.     } else {

  825.         for (compno = 0; compno < s->ncomponents; compno++) {

  826.             y = tile->comp[compno].coord[1][0] - s->image_offset_y;

  827.             line = s->picture->data[0] + y * s->picture->linesize[0];

  828.             for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {

  829.                 uint16_t *dst;

  830. 

  831.                 x = tile->comp[compno].coord[0][0] - s->image_offset_x;

  832.                 dst = (uint16_t *)(line + (x * s->ncomponents + compno) * 2);

  833.                 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s-> cdx[compno]) {

  834.                     int32_t val;

  835. 

  836.                     val = *src[compno]++ << (16 - s->cbps[compno]);

  837.                     val += 1 << 15;

  838.                     val = av_clip(val, 0, (1 << 16) - 1);

  839.                     *dst = val;

  840.                     dst += s->ncomponents;

  841.                 }

  842.                 line += s->picture->linesize[0];

  843.             }

  844.         }

  845.     }

  846.     return 0;

  847. }

  848. 

  849. static void cleanup(Jpeg2000DecoderContext *s)

  850. {

  851.     int tileno, compno;

  852.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {

  853.         for (compno = 0; compno < s->ncomponents; compno++) {

  854.             Jpeg2000Component *comp = s->tile[tileno].comp + compno;

  855.             Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;

  856. 

  857.             ff_j2k_cleanup(comp, codsty);

  858.         }

  859.         av_freep(&s->tile[tileno].comp);

  860.     }

  861.     av_freep(&s->tile);

  862. }

  863. 

  864. static int decode_codestream(Jpeg2000DecoderContext *s)

  865. {

  866.     Jpeg2000CodingStyle *codsty = s->codsty;

  867.     Jpeg2000QuantStyle  *qntsty = s->qntsty;

  868.     uint8_t *properties = s->properties;

  869. 

  870.     for (;;) {

  871.         int oldpos, marker, len, ret = 0;

  872. 

  873.         if (bytestream2_get_bytes_left(&s->g) < 2) {

  874.             av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");

  875.             break;

  876.         }

  877. 

  878.         marker = bytestream2_get_be16u(&s->g);

  879.         av_dlog(s->avctx, "marker 0x%.4X at pos 0x%x\n", marker, bytestream2_tell(&s->g) - 4);

  880.         oldpos = bytestream2_tell(&s->g);

  881. 

  882.         if (marker == JPEG2000_SOD) {

  883.             Jpeg2000Tile *tile = s->tile + s->curtileno;

  884.             if (ret = init_tile(s, s->curtileno)) {

  885.                 av_log(s->avctx, AV_LOG_ERROR, "tile initialization failed\n");

  886.                 return ret;

  887.             }

  888.             if (ret = jpeg2000_decode_packets(s, tile)) {

  889.                 av_log(s->avctx, AV_LOG_ERROR, "packets decoding failed\n");

  890.                 return ret;

  891.             }

  892.             continue;

  893.         }

  894.         if (marker == JPEG2000_EOC)

  895.             break;

  896. 

  897.         if (bytestream2_get_bytes_left(&s->g) < 2)

  898.             return AVERROR(EINVAL);

  899.         len = bytestream2_get_be16u(&s->g);

  900.         switch (marker) {

  901.         case JPEG2000_SIZ:

  902.             ret = get_siz(s);

  903.             if (!s->tile)

  904.                 s->numXtiles = s->numYtiles = 0;

  905.             break;

  906.         case JPEG2000_COC:

  907.             ret = get_coc(s, codsty, properties);

  908.             break;

  909.         case JPEG2000_COD:

  910.             ret = get_cod(s, codsty, properties);

  911.             break;

  912.         case JPEG2000_QCC:

  913.             ret = get_qcc(s, len, qntsty, properties);

  914.             break;

  915.         case JPEG2000_QCD:

  916.             ret = get_qcd(s, len, qntsty, properties);

  917.             break;

  918.         case JPEG2000_SOT:

  919.             if (!(ret = get_sot(s))) {

  920.                 codsty = s->tile[s->curtileno].codsty;

  921.                 qntsty = s->tile[s->curtileno].qntsty;

  922.                 properties = s->tile[s->curtileno].properties;

  923.             }

  924.             break;

  925.         case JPEG2000_COM:

  926.             // the comment is ignored

  927.             bytestream2_skip(&s->g, len - 2);

  928.             break;

  929.         default:

  930.             av_log(s->avctx, AV_LOG_ERROR, "unsupported marker 0x%.4X at pos 0x%x\n", marker, bytestream2_tell(&s->g) - 4);

  931.             bytestream2_skip(&s->g, len - 2);

  932.             break;

  933.         }

  934.         if (bytestream2_tell(&s->g) - oldpos != len || ret) {

  935.             av_log(s->avctx, AV_LOG_ERROR, "error during processing marker segment %.4x\n", marker);

  936.             return ret ? ret : -1;

  937.         }

  938.     }

  939.     return 0;

  940. }

  941. 

  942. static int jp2_find_codestream(Jpeg2000DecoderContext *s)

  943. {

  944.     uint32_t atom_size, atom;

  945.     int found_codestream = 0, search_range = 10;

  946. 

  947.     while (!found_codestream && search_range && bytestream2_get_bytes_left(&s->g) >= 8) {

  948.         atom_size = bytestream2_get_be32u(&s->g);

  949.         atom      = bytestream2_get_be32u(&s->g);

  950.         if (atom == JP2_CODESTREAM) {

  951.             found_codestream = 1;

  952.         } else {

  953.             if (bytestream2_get_bytes_left(&s->g) < atom_size - 8)

  954.                 return 0;

  955.             bytestream2_skipu(&s->g, atom_size - 8);

  956.             search_range--;

  957.         }

  958.     }

  959. 

  960.     if (found_codestream)

  961.         return 1;

  962.     return 0;

  963. }

  964. 

  965. static int decode_frame(AVCodecContext *avctx,

  966.                         void *data, int *got_frame,

  967.                         AVPacket *avpkt)

  968. {

  969.     Jpeg2000DecoderContext *s = avctx->priv_data;

  970.     AVFrame *picture = data;

  971.     int tileno, ret;

  972. 

  973.     s->picture = picture;

  974. 

  975.     s->avctx     = avctx;

  976.     bytestream2_init(&s->g, avpkt->data, avpkt->size);

  977.     s->curtileno = -1;

  978. 

  979.     if (bytestream2_get_bytes_left(&s->g) < 2) {

  980.         ret = AVERROR(EINVAL);

  981.         goto err_out;

  982.     }

  983. 

  984.     // check if the image is in jp2 format

  985.     if (bytestream2_get_bytes_left(&s->g) >= 12 &&

  986.        (bytestream2_get_be32u(&s->g) == 12) &&

  987.        (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&

  988.        (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {

  989.         if (!jp2_find_codestream(s)) {

  990.             av_log(avctx, AV_LOG_ERROR, "couldn't find jpeg2k codestream atom\n");

  991.             ret = -1;

  992.             goto err_out;

  993.         }

  994.     } else {

  995.         bytestream2_seek(&s->g, 0, SEEK_SET);

  996.     }

  997. 

  998.     if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {

  999.         av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");

  1000.         ret = -1;

  1001.         goto err_out;

  1002.     }

  1003.     if (ret = decode_codestream(s))

  1004.         goto err_out;

  1005. 

  1006.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)

  1007.         if (ret = decode_tile(s, s->tile + tileno))

  1008.             goto err_out;

  1009. 

  1010.     cleanup(s);

  1011. 

  1012.     *got_frame = 1;

  1013. 

  1014.     return bytestream2_tell(&s->g);

  1015. 

  1016. err_out:

  1017.     cleanup(s);

  1018.     return ret;

  1019. }

  1020. 

  1021. static void jpeg2000_init_static_data(AVCodec *codec)

  1022. {

  1023.     ff_jpeg2000_init_tier1_luts();

  1024. }

  1025. 

  1026. static const AVProfile profiles[] = {

  1027.     { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0,  "JPEG 2000 codestream restriction 0"   },

  1028.     { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1,  "JPEG 2000 codestream restriction 1"   },

  1029.     { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },

  1030.     { FF_PROFILE_JPEG2000_DCINEMA_2K,             "JPEG 2000 digital cinema 2K"          },

  1031.     { FF_PROFILE_JPEG2000_DCINEMA_4K,             "JPEG 2000 digital cinema 4K"          },

  1032.     { FF_PROFILE_UNKNOWN },

  1033. };

  1034. 

  1035. AVCodec ff_j2k_decoder = {

  1036.     .name             = "j2k",

  1037.     .long_name        = NULL_IF_CONFIG_SMALL("JPEG 2000"),

  1038.     .type             = AVMEDIA_TYPE_VIDEO,

  1039.     .id               = AV_CODEC_ID_JPEG2000,

  1040.     .capabilities     = CODEC_CAP_EXPERIMENTAL | CODEC_CAP_FRAME_THREADS,

  1041.     .priv_data_size   = sizeof(Jpeg2000DecoderContext),

  1042.     .init_static_data = jpeg2000_init_static_data,

  1043.     .decode           = decode_frame,

  1044.     .profiles         = NULL_IF_CONFIG_SMALL(profiles)

  1045. };