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FFmpeg/libavcodec/j2kdec.c

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  1. /*

  2.  * JPEG2000 image decoder

  3.  * Copyright (c) 2007 Kamil Nowosad

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * JPEG2000 image decoder

  24.  * @file

  25.  * @author Kamil Nowosad

  26.  */

  27. 

  28. // #define DEBUG

  29. 

  30. #include "avcodec.h"

  31. #include "bytestream.h"

  32. #include "internal.h"

  33. #include "thread.h"

  34. #include "j2k.h"

  35. #include "libavutil/common.h"

  36. 

  37. #define JP2_SIG_TYPE    0x6A502020

  38. #define JP2_SIG_VALUE   0x0D0A870A

  39. #define JP2_CODESTREAM  0x6A703263

  40. 

  41. #define HAD_COC 0x01

  42. #define HAD_QCC 0x02

  43. 

  44. typedef struct {

  45.    Jpeg2000Component *comp;

  46.    uint8_t properties[4];

  47.    Jpeg2000CodingStyle codsty[4];

  48.    Jpeg2000QuantStyle  qntsty[4];

  49. } Jpeg2000Tile;

  50. 

  51. typedef struct Jpeg2000DecoderContext {

  52.     AVCodecContext  *avctx;

  53.     AVFrame         *picture;

  54.     GetByteContext  g;

  55. 

  56.     int             width, height;

  57.     int             image_offset_x, image_offset_y;

  58.     int             tile_offset_x, tile_offset_y;

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

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

  61.     uint8_t         properties[4];

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

  63.     int             precision;

  64.     int             ncomponents;

  65.     int             tile_width, tile_height;

  66.     int             numXtiles, numYtiles;

  67.     int             maxtilelen;

  68. 

  69.     Jpeg2000CodingStyle codsty[4];

  70.     Jpeg2000QuantStyle  qntsty[4];

  71. 

  72.     int             bit_index;

  73. 

  74.     int             curtileno;

  75. 

  76.     Jpeg2000Tile    *tile;

  77. } Jpeg2000DecoderContext;

  78. 

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

  80. {

  81.     int res = 0;

  82. 

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

  84.         res <<= 1;

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

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

  87.         }

  88.         s->bit_index--;

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

  90.     }

  91.     return res;

  92. }

  93. 

  94. static void j2k_flush(Jpeg2000DecoderContext *s)

  95. {

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

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

  98.     s->bit_index = 8;

  99. }

  100. 

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

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

  103. {

  104.     Jpeg2000TgtNode *stack[30];

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

  106. 

  107.     if (!node)

  108.         return AVERROR(EINVAL);

  109. 

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

  111.         stack[++sp] = node;

  112.         node = node->parent;

  113.     }

  114. 

  115.     if (node)

  116.         curval = node->val;

  117.     else

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

  119. 

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

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

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

  123.         while (curval < threshold) {

  124.             int ret;

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

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

  127.                 break;

  128.             } else if (!ret)

  129.                 curval++;

  130.             else

  131.                 return ret;

  132.         }

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

  134.         sp--;

  135.     }

  136.     return curval;

  137. }

  138. 

  139. /* marker segments */

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

  141. static int get_siz(Jpeg2000DecoderContext *s)

  142. {

  143.     int i, ret;

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

  145. 

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

  147.         return AVERROR(EINVAL);

  148. 

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

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

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

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

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

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

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

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

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

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

  159. 

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

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

  162.         return AVERROR(EINVAL);

  163.     }

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

  165.         return AVERROR(EINVAL);

  166. 

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

  168.         return AVERROR(EINVAL);

  169. 

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

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

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

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

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

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

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

  177.     }

  178. 

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

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

  181. 

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

  183.         return AVERROR(EINVAL);

  184. 

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

  186.     if (!s->tile)

  187.         return AVERROR(ENOMEM);

  188. 

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

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

  191. 

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

  193.         if (!tile->comp)

  194.             return AVERROR(ENOMEM);

  195.     }

  196. 

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

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

  199. 

  200.     switch(s->ncomponents) {

  201.     case 1:

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

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

  204.         } else {

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

  206.         }

  207.         break;

  208.     case 3:

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

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

  211.         } else {

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

  213.         }

  214.         break;

  215.     case 4:

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

  217.         break;

  218.     }

  219. 

  220. 

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

  222.         return ret;

  223. 

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

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

  226. 

  227.     return 0;

  228. }

  229. 

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

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

  232. {

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

  234.         return AVERROR(EINVAL);

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

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

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

  238. 

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

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

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

  242.     }

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

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

  245.         int i;

  246. 

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

  248.             bytestream2_get_byte(&s->g);

  249.     }

  250.     return 0;

  251. }

  252. 

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

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

  255. {

  256.     Jpeg2000CodingStyle tmp;

  257.     int compno;

  258. 

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

  260.         return AVERROR(EINVAL);

  261. 

  262.     tmp.log2_prec_width  =

  263.     tmp.log2_prec_height = 15;

  264. 

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

  266. 

  267.     // get progression order

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

  269.     if (tmp.prog_order) {

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

  271.     }

  272. 

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

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

  275. 

  276.     get_cox(s, &tmp);

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

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

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

  280.     }

  281.     return 0;

  282. }

  283. 

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

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

  286. {

  287.     int compno;

  288. 

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

  290.         return AVERROR(EINVAL);

  291. 

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

  293. 

  294.     c += compno;

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

  296.     get_cox(s, c);

  297. 

  298.     properties[compno] |= HAD_COC;

  299.     return 0;

  300. }

  301. 

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

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

  304. {

  305.     int i, x;

  306. 

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

  308.         return AVERROR(EINVAL);

  309. 

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

  311. 

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

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

  314. 

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

  316.         n -= 3;

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

  318.             return AVERROR(EINVAL);

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

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

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

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

  323.             return AVERROR(EINVAL);

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

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

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

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

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

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

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

  331.         }

  332.     } else{

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

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

  335.             return AVERROR(EINVAL);

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

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

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

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

  340.         }

  341.     }

  342.     return 0;

  343. }

  344. 

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

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

  347. {

  348.     Jpeg2000QuantStyle tmp;

  349.     int compno;

  350. 

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

  352.         return -1;

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

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

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

  356.     return 0;

  357. }

  358. 

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

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

  361. {

  362.     int compno;

  363. 

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

  365.         return AVERROR(EINVAL);

  366. 

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

  368.     properties[compno] |= HAD_QCC;

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

  370. }

  371. 

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

  373. static int get_sot(Jpeg2000DecoderContext *s)

  374. {

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

  376.         return AVERROR(EINVAL);

  377. 

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

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

  380.         s->curtileno=0;

  381.         return AVERROR(EINVAL);

  382.     }

  383. 

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

  385. 

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

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

  388. 

  389.         /* copy defaults */

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

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

  392.     }

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

  394. 

  395.     return 0;

  396. }

  397. 

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

  399. {

  400.     int compno,

  401.         tilex = tileno % s->numXtiles,

  402.         tiley = tileno / s->numXtiles;

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

  404. 

  405.     if (!tile->comp)

  406.         return AVERROR(ENOMEM);

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

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

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

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

  411.         int ret; // global bandno

  412. 

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

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

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

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

  417. 

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

  419.             return ret;

  420.     }

  421.     return 0;

  422. }

  423. 

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

  425. static int getnpasses(Jpeg2000DecoderContext *s)

  426. {

  427.     int num;

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

  429.         return 1;

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

  431.         return 2;

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

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

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

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

  436.     num = get_bits(s, 7);

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

  438. }

  439. 

  440. static int getlblockinc(Jpeg2000DecoderContext *s)

  441. {

  442.     int res = 0, ret;

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

  444.         if (ret < 0)

  445.             return ret;

  446.         res++;

  447.     }

  448.     return res;

  449. }

  450. 

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

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

  453. {

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

  455. 

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

  457.         j2k_flush(s);

  458.         return 0;

  459.     } else if (ret < 0)

  460.         return ret;

  461. 

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

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

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

  465.         int pos = 0;

  466. 

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

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

  469.             continue;

  470. 

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

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

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

  474.                 int incl, newpasses, llen;

  475. 

  476.                 if (cblk->npasses)

  477.                     incl = get_bits(s, 1);

  478.                 else

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

  480.                 if (!incl)

  481.                     continue;

  482.                 else if (incl < 0)

  483.                     return incl;

  484. 

  485.                 if (!cblk->npasses)

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

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

  488.                     return newpasses;

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

  490.                     return llen;

  491.                 cblk->lblock += llen;

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

  493.                     return ret;

  494.                 cblk->lengthinc = ret;

  495.                 cblk->npasses += newpasses;

  496.             }

  497.     }

  498.     j2k_flush(s);

  499. 

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

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

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

  503.         } else {

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

  505.         }

  506.     }

  507. 

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

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

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

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

  512.             int xi;

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

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

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

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

  517.                 )

  518.                     return AVERROR(EINVAL);

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

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

  521.                 cblk->lengthinc = 0;

  522.             }

  523.         }

  524.     }

  525.     return 0;

  526. }

  527. 

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

  529. {

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

  531.     s->bit_index = 8;

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

  533.         ok_reslevel = 1;

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

  535.             ok_reslevel = 0;

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

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

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

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

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

  541.                     ok_reslevel = 1;

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

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

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

  545.                             return -1;

  546.                     }

  547.                 }

  548.             }

  549.         }

  550.     }

  551.     return 0;

  552. }

  553. 

  554. /* TIER-1 routines */

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

  556.                            int vert_causal_ctx_csty_symbol)

  557. {

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

  559. 

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

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

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

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

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

  565.                     int flags_mask = -1;

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

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

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

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

  570.                         if (bpass_csty_symbol)

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

  572.                         else

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

  574.                                                -mask : mask;

  575. 

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

  577.                     }

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

  579.                 }

  580.             }

  581. }

  582. 

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

  584. {

  585.     int phalf, nhalf;

  586.     int y0, x, y;

  587. 

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

  589.     nhalf = -phalf;

  590. 

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

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

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

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

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

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

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

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

  599.                 }

  600.             }

  601. }

  602. 

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

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

  605. {

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

  607. 

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

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

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

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

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

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

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

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

  616.                     continue;

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

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

  619.                 dec = 1;

  620.             } else{

  621.                 runlen = 0;

  622.                 dec = 0;

  623.             }

  624. 

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

  626.                 if (!dec) {

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

  628.                         int flags_mask = -1;

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

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

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

  632.                                                                                              bandno));

  633.                     }

  634.                 }

  635.                 if (dec) {

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

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

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

  639.                 }

  640.                 dec = 0;

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

  642.             }

  643.         }

  644.     }

  645.     if (seg_symbols) {

  646.         int val;

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

  648.         val = (val << 1) + 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.         if (val != 0xa) {

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

  653.         }

  654.     }

  655. }

  656. 

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

  658.                        int width, int height, int bandpos)

  659. {

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

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

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

  663. 

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

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

  666. 

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

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

  669. 

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

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

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

  673. 

  674.     while (passno--) {

  675.         switch(pass_t) {

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

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

  678.                     break;

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

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

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

  682.                     break;

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

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

  685.                     clnpass_cnt = clnpass_cnt + 1;

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

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

  688.                     break;

  689.         }

  690. 

  691.         pass_t++;

  692.         if (pass_t == 3) {

  693.             bpno--;

  694.             pass_t = 0;

  695.         }

  696.     }

  697.     return 0;

  698. }

  699. 

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

  701. {

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

  703. 

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

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

  706. 

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

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

  709. 

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

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

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

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

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

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

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

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

  718.         }

  719.     } else{

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

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

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

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

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

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

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

  727.         }

  728.     }

  729. }

  730. 

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

  732. {

  733.     int compno, reslevelno, bandno;

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

  735.     uint8_t *line;

  736.     Jpeg2000T1Context t1;

  737. 

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

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

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

  741. 

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

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

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

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

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

  747. 

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

  749. 

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

  751.                 y0 = yy0;

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

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

  754. 

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

  756.                     continue;

  757. 

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

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

  760.                         xx0 = 0;

  761.                     else

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

  763.                     x0 = xx0;

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

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

  766. 

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

  768.                         int y, x;

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

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

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

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

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

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

  775.                                 }

  776.                             }

  777.                         } else{

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

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

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

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

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

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

  784.                                 }

  785.                             }

  786.                         }

  787.                         xx0 = xx1;

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

  789.                     }

  790.                     yy0 = yy1;

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

  792.                 }

  793.             }

  794.         }

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

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

  797.     }

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

  799.         mct_decode(s, tile);

  800. 

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

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

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

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

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

  806.                 uint8_t *dst;

  807. 

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

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

  810. 

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

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

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

  814.                         *src[compno] = 0;

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

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

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

  818.                     dst += s->ncomponents;

  819.                 }

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

  821.             }

  822.         }

  823.     } else {

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

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

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

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

  828.                 uint16_t *dst;

  829. 

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

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

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

  833.                     int32_t val;

  834. 

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

  836.                     val += 1 << 15;

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

  838.                     *dst = val;

  839.                     dst += s->ncomponents;

  840.                 }

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

  842.             }

  843.         }

  844.     }

  845.     return 0;

  846. }

  847. 

  848. static void cleanup(Jpeg2000DecoderContext *s)

  849. {

  850.     int tileno, compno;

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

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

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

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

  855. 

  856.             ff_j2k_cleanup(comp, codsty);

  857.         }

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

  859.     }

  860.     av_freep(&s->tile);

  861. }

  862. 

  863. static int decode_codestream(Jpeg2000DecoderContext *s)

  864. {

  865.     Jpeg2000CodingStyle *codsty = s->codsty;

  866.     Jpeg2000QuantStyle  *qntsty = s->qntsty;

  867.     uint8_t *properties = s->properties;

  868. 

  869.     for (;;) {

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

  871. 

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

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

  874.             break;

  875.         }

  876. 

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

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

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

  880. 

  881.         if (marker == JPEG2000_SOD) {

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

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

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

  885.                 return ret;

  886.             }

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

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

  889.                 return ret;

  890.             }

  891.             continue;

  892.         }

  893.         if (marker == JPEG2000_EOC)

  894.             break;

  895. 

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

  897.             return AVERROR(EINVAL);

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

  899.         switch (marker) {

  900.         case JPEG2000_SIZ:

  901.             ret = get_siz(s);

  902.             if (!s->tile)

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

  904.             break;

  905.         case JPEG2000_COC:

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

  907.             break;

  908.         case JPEG2000_COD:

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

  910.             break;

  911.         case JPEG2000_QCC:

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

  913.             break;

  914.         case JPEG2000_QCD:

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

  916.             break;

  917.         case JPEG2000_SOT:

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

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

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

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

  922.             }

  923.             break;

  924.         case JPEG2000_COM:

  925.             // the comment is ignored

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

  927.             break;

  928.         default:

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

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

  931.             break;

  932.         }

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

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

  935.             return ret ? ret : -1;

  936.         }

  937.     }

  938.     return 0;

  939. }

  940. 

  941. static int jp2_find_codestream(Jpeg2000DecoderContext *s)

  942. {

  943.     uint32_t atom_size, atom;

  944.     int found_codestream = 0, search_range = 10;

  945. 

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

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

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

  949.         if (atom == JP2_CODESTREAM) {

  950.             found_codestream = 1;

  951.         } else {

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

  953.                 return 0;

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

  955.             search_range--;

  956.         }

  957.     }

  958. 

  959.     if (found_codestream)

  960.         return 1;

  961.     return 0;

  962. }

  963. 

  964. static int decode_frame(AVCodecContext *avctx,

  965.                         void *data, int *got_frame,

  966.                         AVPacket *avpkt)

  967. {

  968.     Jpeg2000DecoderContext *s = avctx->priv_data;

  969.     AVFrame *picture = data;

  970.     int tileno, ret;

  971. 

  972.     s->picture = picture;

  973. 

  974.     s->avctx     = avctx;

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

  976.     s->curtileno = -1;

  977. 

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

  979.         ret = AVERROR(EINVAL);

  980.         goto err_out;

  981.     }

  982. 

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

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

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

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

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

  988.         if (!jp2_find_codestream(s)) {

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

  990.             ret = -1;

  991.             goto err_out;

  992.         }

  993.     } else {

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

  995.     }

  996. 

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

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

  999.         ret = -1;

  1000.         goto err_out;

  1001.     }

  1002.     if (ret = decode_codestream(s))

  1003.         goto err_out;

  1004. 

  1005.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)

  1006.         if (ret = decode_tile(s, s->tile + tileno))

  1007.             goto err_out;

  1008. 

  1009.     cleanup(s);

  1010. 

  1011.     *got_frame = 1;

  1012. 

  1013.     return bytestream2_tell(&s->g);

  1014. 

  1015. err_out:

  1016.     cleanup(s);

  1017.     return ret;

  1018. }

  1019. 

  1020. static void jpeg2000_init_static_data(AVCodec *codec)

  1021. {

  1022.     ff_jpeg2000_init_tier1_luts();

  1023. }

  1024. 

  1025. static const AVProfile profiles[] = {

  1026.     { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0,  "JPEG 2000 codestream restriction 0"   },

  1027.     { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1,  "JPEG 2000 codestream restriction 1"   },

  1028.     { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },

  1029.     { FF_PROFILE_JPEG2000_DCINEMA_2K,             "JPEG 2000 digital cinema 2K"          },

  1030.     { FF_PROFILE_JPEG2000_DCINEMA_4K,             "JPEG 2000 digital cinema 4K"          },

  1031.     { FF_PROFILE_UNKNOWN },

  1032. };

  1033. 

  1034. AVCodec ff_j2k_decoder = {

  1035.     .name             = "j2k",

  1036.     .long_name        = NULL_IF_CONFIG_SMALL("JPEG 2000"),

  1037.     .type             = AVMEDIA_TYPE_VIDEO,

  1038.     .id               = AV_CODEC_ID_JPEG2000,

  1039.     .capabilities     = CODEC_CAP_EXPERIMENTAL | CODEC_CAP_FRAME_THREADS,

  1040.     .priv_data_size   = sizeof(Jpeg2000DecoderContext),

  1041.     .init_static_data = jpeg2000_init_static_data,

  1042.     .decode           = decode_frame,

  1043.     .profiles         = NULL_IF_CONFIG_SMALL(profiles)

  1044. };