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FFmpeg/libavcodec/jpeg2000.c

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  1. /*

  2.  * JPEG 2000 encoder and decoder common functions

  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.  * @file

  25.  * JPEG 2000 image encoder and decoder common functions

  26.  */

  27. 

  28. #include "libavutil/attributes.h"

  29. #include "libavutil/avassert.h"

  30. #include "libavutil/common.h"

  31. #include "libavutil/imgutils.h"

  32. #include "libavutil/mem.h"

  33. #include "avcodec.h"

  34. #include "internal.h"

  35. #include "jpeg2000.h"

  36. 

  37. #define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n))

  38. 

  39. /* tag tree routines */

  40. 

  41. /* allocate the memory for tag tree */

  42. static int32_t tag_tree_size(int w, int h)

  43. {

  44.     int64_t res = 0;

  45.     while (w > 1 || h > 1) {

  46.         res += w * (int64_t)h;

  47.         av_assert0(res + 1 < INT32_MAX);

  48.         w = (w + 1) >> 1;

  49.         h = (h + 1) >> 1;

  50.     }

  51.     return (int32_t)(res + 1);

  52. }

  53. 

  54. static Jpeg2000TgtNode *ff_jpeg2000_tag_tree_init(int w, int h)

  55. {

  56.     int pw = w, ph = h;

  57.     Jpeg2000TgtNode *res, *t, *t2;

  58.     int32_t tt_size;

  59. 

  60.     tt_size = tag_tree_size(w, h);

  61. 

  62.     t = res = av_mallocz_array(tt_size, sizeof(*t));

  63.     if (!res)

  64.         return NULL;

  65. 

  66.     while (w > 1 || h > 1) {

  67.         int i, j;

  68.         pw = w;

  69.         ph = h;

  70. 

  71.         w  = (w + 1) >> 1;

  72.         h  = (h + 1) >> 1;

  73.         t2 = t + pw * ph;

  74. 

  75.         for (i = 0; i < ph; i++)

  76.             for (j = 0; j < pw; j++)

  77.                 t[i * pw + j].parent = &t2[(i >> 1) * w + (j >> 1)];

  78. 

  79.         t = t2;

  80.     }

  81.     t[0].parent = NULL;

  82.     return res;

  83. }

  84. 

  85. static void tag_tree_zero(Jpeg2000TgtNode *t, int w, int h)

  86. {

  87.     int i, siz = tag_tree_size(w, h);

  88. 

  89.     for (i = 0; i < siz; i++) {

  90.         t[i].val = 0;

  91.         t[i].vis = 0;

  92.     }

  93. }

  94. 

  95. uint8_t ff_jpeg2000_sigctxno_lut[256][4];

  96. 

  97. static int getsigctxno(int flag, int bandno)

  98. {

  99.     int h, v, d;

  100. 

  101.     h = ((flag & JPEG2000_T1_SIG_E)  ? 1 : 0) +

  102.         ((flag & JPEG2000_T1_SIG_W)  ? 1 : 0);

  103.     v = ((flag & JPEG2000_T1_SIG_N)  ? 1 : 0) +

  104.         ((flag & JPEG2000_T1_SIG_S)  ? 1 : 0);

  105.     d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) +

  106.         ((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) +

  107.         ((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) +

  108.         ((flag & JPEG2000_T1_SIG_SW) ? 1 : 0);

  109. 

  110.     if (bandno < 3) {

  111.         if (bandno == 1)

  112.             FFSWAP(int, h, v);

  113.         if (h == 2) return 8;

  114.         if (h == 1) {

  115.             if (v >= 1) return 7;

  116.             if (d >= 1) return 6;

  117.             return 5;

  118.         }

  119.         if (v == 2) return 4;

  120.         if (v == 1) return 3;

  121.         if (d >= 2) return 2;

  122.         if (d == 1) return 1;

  123.     } else {

  124.         if (d >= 3) return 8;

  125.         if (d == 2) {

  126.             if (h+v >= 1) return 7;

  127.             return 6;

  128.         }

  129.         if (d == 1) {

  130.             if (h+v >= 2) return 5;

  131.             if (h+v == 1) return 4;

  132.             return 3;

  133.         }

  134.         if (h+v >= 2) return 2;

  135.         if (h+v == 1) return 1;

  136.     }

  137.     return 0;

  138. }

  139. 

  140. uint8_t ff_jpeg2000_sgnctxno_lut[16][16], ff_jpeg2000_xorbit_lut[16][16];

  141. 

  142. static const int contribtab[3][3] = { {  0, -1,  1 }, { -1, -1,  0 }, {  1,  0,  1 } };

  143. static const int  ctxlbltab[3][3] = { { 13, 12, 11 }, { 10,  9, 10 }, { 11, 12, 13 } };

  144. static const int  xorbittab[3][3] = { {  1,  1,  1 }, {  1,  0,  0 }, {  0,  0,  0 } };

  145. 

  146. static int getsgnctxno(int flag, uint8_t *xorbit)

  147. {

  148.     int vcontrib, hcontrib;

  149. 

  150.     hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1 : 2 : 0]

  151.                          [flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1 : 2 : 0] + 1;

  152.     vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1 : 2 : 0]

  153.                          [flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1 : 2 : 0] + 1;

  154.     *xorbit = xorbittab[hcontrib][vcontrib];

  155. 

  156.     return ctxlbltab[hcontrib][vcontrib];

  157. }

  158. 

  159. void av_cold ff_jpeg2000_init_tier1_luts(void)

  160. {

  161.     int i, j;

  162.     for (i = 0; i < 256; i++)

  163.         for (j = 0; j < 4; j++)

  164.             ff_jpeg2000_sigctxno_lut[i][j] = getsigctxno(i, j);

  165.     for (i = 0; i < 16; i++)

  166.         for (j = 0; j < 16; j++)

  167.             ff_jpeg2000_sgnctxno_lut[i][j] =

  168.                 getsgnctxno(i + (j << 8), &ff_jpeg2000_xorbit_lut[i][j]);

  169. }

  170. 

  171. void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,

  172.                                   int negative)

  173. {

  174.     x++;

  175.     y++;

  176.     t1->flags[(y) * t1->stride + x] |= JPEG2000_T1_SIG;

  177.     if (negative) {

  178.         t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;

  179.         t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;

  180.         t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;

  181.         t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;

  182.     } else {

  183.         t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W;

  184.         t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E;

  185.         t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N;

  186.         t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S;

  187.     }

  188.     t1->flags[(y + 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_NW;

  189.     t1->flags[(y + 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_NE;

  190.     t1->flags[(y - 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_SW;

  191.     t1->flags[(y - 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_SE;

  192. }

  193. 

  194. // static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; (unused)

  195. 

  196. static void init_band_stepsize(AVCodecContext *avctx,

  197.                                Jpeg2000Band *band,

  198.                                Jpeg2000CodingStyle *codsty,

  199.                                Jpeg2000QuantStyle *qntsty,

  200.                                int bandno, int gbandno, int reslevelno,

  201.                                int cbps)

  202. {

  203.     /* TODO: Implementation of quantization step not finished,

  204.      * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */

  205.     switch (qntsty->quantsty) {

  206.         uint8_t gain;

  207.     case JPEG2000_QSTY_NONE:

  208.         /* TODO: to verify. No quantization in this case */

  209.         band->f_stepsize = 1;

  210.         break;

  211.     case JPEG2000_QSTY_SI:

  212.         /*TODO: Compute formula to implement. */

  213. //         numbps = cbps +

  214. //                  lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];

  215. //         band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],

  216. //                                2 + numbps - qntsty->expn[gbandno]);

  217. //         break;

  218.     case JPEG2000_QSTY_SE:

  219.         /* Exponent quantization step.

  220.          * Formula:

  221.          * delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11))

  222.          * R_b = R_I + log2 (gain_b )

  223.          * see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */

  224.         gain            = cbps;

  225.         band->f_stepsize  = ff_exp2fi(gain - qntsty->expn[gbandno]);

  226.         band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0;

  227.         break;

  228.     default:

  229.         band->f_stepsize = 0;

  230.         av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");

  231.         break;

  232.     }

  233.     if (codsty->transform != FF_DWT53) {

  234.         int lband = 0;

  235.         switch (bandno + (reslevelno > 0)) {

  236.             case 1:

  237.             case 2:

  238.                 band->f_stepsize *= F_LFTG_X * 2;

  239.                 lband = 1;

  240.                 break;

  241.             case 3:

  242.                 band->f_stepsize *= F_LFTG_X * F_LFTG_X * 4;

  243.                 break;

  244.         }

  245.         if (codsty->transform == FF_DWT97) {

  246.             band->f_stepsize *= pow(F_LFTG_K, 2*(codsty->nreslevels2decode - reslevelno) + lband - 2);

  247.         }

  248.     }

  249. 

  250.     band->i_stepsize = band->f_stepsize * (1 << 15);

  251. 

  252.     /* FIXME: In OpenJPEG code stepsize = stepsize * 0.5. Why?

  253.      * If not set output of entropic decoder is not correct. */

  254.     if (!av_codec_is_encoder(avctx->codec))

  255.         band->f_stepsize *= 0.5;

  256. }

  257. 

  258. static int init_prec(Jpeg2000Band *band,

  259.                      Jpeg2000ResLevel *reslevel,

  260.                      Jpeg2000Component *comp,

  261.                      int precno, int bandno, int reslevelno,

  262.                      int log2_band_prec_width,

  263.                      int log2_band_prec_height)

  264. {

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

  266.     int nb_codeblocks, cblkno;

  267. 

  268.     prec->decoded_layers = 0;

  269. 

  270.     /* TODO: Explain formula for JPEG200 DCINEMA. */

  271.     /* TODO: Verify with previous count of codeblocks per band */

  272. 

  273.     /* Compute P_x0 */

  274.     prec->coord[0][0] = ((band->coord[0][0] >> log2_band_prec_width) + precno % reslevel->num_precincts_x) *

  275.                         (1 << log2_band_prec_width);

  276. 

  277.     /* Compute P_y0 */

  278.     prec->coord[1][0] = ((band->coord[1][0] >> log2_band_prec_height) + precno / reslevel->num_precincts_x) *

  279.                         (1 << log2_band_prec_height);

  280. 

  281.     /* Compute P_x1 */

  282.     prec->coord[0][1] = prec->coord[0][0] +

  283.                         (1 << log2_band_prec_width);

  284.     prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);

  285.     prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);

  286. 

  287.     /* Compute P_y1 */

  288.     prec->coord[1][1] = prec->coord[1][0] +

  289.                         (1 << log2_band_prec_height);

  290.     prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);

  291.     prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);

  292. 

  293.     prec->nb_codeblocks_width =

  294.         ff_jpeg2000_ceildivpow2(prec->coord[0][1],

  295.                                 band->log2_cblk_width)

  296.         - (prec->coord[0][0] >> band->log2_cblk_width);

  297.     prec->nb_codeblocks_height =

  298.         ff_jpeg2000_ceildivpow2(prec->coord[1][1],

  299.                                 band->log2_cblk_height)

  300.         - (prec->coord[1][0] >> band->log2_cblk_height);

  301. 

  302. 

  303.     /* Tag trees initialization */

  304.     prec->cblkincl =

  305.         ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  306.                                   prec->nb_codeblocks_height);

  307.     if (!prec->cblkincl)

  308.         return AVERROR(ENOMEM);

  309. 

  310.     prec->zerobits =

  311.         ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  312.                                   prec->nb_codeblocks_height);

  313.     if (!prec->zerobits)

  314.         return AVERROR(ENOMEM);

  315. 

  316.     if (prec->nb_codeblocks_width * (uint64_t)prec->nb_codeblocks_height > INT_MAX) {

  317.         prec->cblk = NULL;

  318.         return AVERROR(ENOMEM);

  319.     }

  320.     nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height;

  321.     prec->cblk = av_mallocz_array(nb_codeblocks, sizeof(*prec->cblk));

  322.     if (!prec->cblk)

  323.         return AVERROR(ENOMEM);

  324.     for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) {

  325.         Jpeg2000Cblk *cblk = prec->cblk + cblkno;

  326.         int Cx0, Cy0;

  327. 

  328.         /* Compute coordinates of codeblocks */

  329.         /* Compute Cx0*/

  330.         Cx0 = ((prec->coord[0][0]) >> band->log2_cblk_width) << band->log2_cblk_width;

  331.         Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width)  << band->log2_cblk_width);

  332.         cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);

  333. 

  334.         /* Compute Cy0*/

  335.         Cy0 = ((prec->coord[1][0]) >> band->log2_cblk_height) << band->log2_cblk_height;

  336.         Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width)   << band->log2_cblk_height);

  337.         cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);

  338. 

  339.         /* Compute Cx1 */

  340.         cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),

  341.                                   prec->coord[0][1]);

  342. 

  343.         /* Compute Cy1 */

  344.         cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),

  345.                                   prec->coord[1][1]);

  346.         /* Update code-blocks coordinates according sub-band position */

  347.         if ((bandno + !!reslevelno) & 1) {

  348.             cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -

  349.                                  comp->reslevel[reslevelno-1].coord[0][0];

  350.             cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -

  351.                                  comp->reslevel[reslevelno-1].coord[0][0];

  352.         }

  353.         if ((bandno + !!reslevelno) & 2) {

  354.             cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -

  355.                                  comp->reslevel[reslevelno-1].coord[1][0];

  356.             cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -

  357.                                  comp->reslevel[reslevelno-1].coord[1][0];

  358.         }

  359. 

  360.         cblk->lblock    = 3;

  361.         cblk->length    = 0;

  362.         cblk->npasses   = 0;

  363.     }

  364. 

  365.     return 0;

  366. }

  367. 

  368. static int init_band(AVCodecContext *avctx,

  369.                      Jpeg2000ResLevel *reslevel,

  370.                      Jpeg2000Component *comp,

  371.                      Jpeg2000CodingStyle *codsty,

  372.                      Jpeg2000QuantStyle *qntsty,

  373.                      int bandno, int gbandno, int reslevelno,

  374.                      int cbps, int dx, int dy)

  375. {

  376.     Jpeg2000Band *band = reslevel->band + bandno;

  377.     uint8_t log2_band_prec_width, log2_band_prec_height;

  378.     int declvl = codsty->nreslevels - reslevelno;    // N_L -r see  ISO/IEC 15444-1:2002 B.5

  379.     int precno;

  380.     int nb_precincts;

  381.     int i, j, ret;

  382. 

  383.     init_band_stepsize(avctx, band, codsty, qntsty, bandno, gbandno, reslevelno, cbps);

  384. 

  385.     /* computation of tbx_0, tbx_1, tby_0, tby_1

  386.      * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1

  387.      * codeblock width and height is computed for

  388.      * DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */

  389.     if (reslevelno == 0) {

  390.         /* for reslevelno = 0, only one band, x0_b = y0_b = 0 */

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

  392.             for (j = 0; j < 2; j++)

  393.                 band->coord[i][j] =

  394.                     ff_jpeg2000_ceildivpow2(comp->coord_o[i][j],

  395.                                             declvl - 1);

  396.         log2_band_prec_width  = reslevel->log2_prec_width;

  397.         log2_band_prec_height = reslevel->log2_prec_height;

  398.         /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */

  399.         band->log2_cblk_width  = FFMIN(codsty->log2_cblk_width,

  400.                                        reslevel->log2_prec_width);

  401.         band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,

  402.                                        reslevel->log2_prec_height);

  403.     } else {

  404.         /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */

  405.         /* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */

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

  407.             for (j = 0; j < 2; j++)

  408.                 /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */

  409.                 band->coord[i][j] =

  410.                     ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] -

  411.                                             (((bandno + 1 >> i) & 1LL) << declvl - 1),

  412.                                             declvl);

  413.         /* TODO: Manage case of 3 band offsets here or

  414.          * in coding/decoding function? */

  415. 

  416.         /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */

  417.         band->log2_cblk_width  = FFMIN(codsty->log2_cblk_width,

  418.                                        reslevel->log2_prec_width - 1);

  419.         band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,

  420.                                        reslevel->log2_prec_height - 1);

  421. 

  422.         log2_band_prec_width  = reslevel->log2_prec_width  - 1;

  423.         log2_band_prec_height = reslevel->log2_prec_height - 1;

  424.     }

  425. 

  426.     if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y > INT_MAX) {

  427.         band->prec = NULL;

  428.         return AVERROR(ENOMEM);

  429.     }

  430.     nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;

  431.     band->prec = av_mallocz_array(nb_precincts, sizeof(*band->prec));

  432.     if (!band->prec)

  433.         return AVERROR(ENOMEM);

  434. 

  435.     for (precno = 0; precno < nb_precincts; precno++) {

  436.         ret = init_prec(band, reslevel, comp,

  437.                         precno, bandno, reslevelno,

  438.                         log2_band_prec_width, log2_band_prec_height);

  439.         if (ret < 0)

  440.             return ret;

  441.     }

  442. 

  443.     return 0;

  444. }

  445. 

  446. int ff_jpeg2000_init_component(Jpeg2000Component *comp,

  447.                                Jpeg2000CodingStyle *codsty,

  448.                                Jpeg2000QuantStyle *qntsty,

  449.                                int cbps, int dx, int dy,

  450.                                AVCodecContext *avctx)

  451. {

  452.     int reslevelno, bandno, gbandno = 0, ret, i, j;

  453.     uint32_t csize;

  454. 

  455.     if (codsty->nreslevels2decode <= 0) {

  456.         av_log(avctx, AV_LOG_ERROR, "nreslevels2decode %d invalid or uninitialized\n", codsty->nreslevels2decode);

  457.         return AVERROR_INVALIDDATA;

  458.     }

  459. 

  460.     if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,

  461.                                    codsty->nreslevels2decode - 1,

  462.                                    codsty->transform))

  463.         return ret;

  464. 

  465.     if (av_image_check_size(comp->coord[0][1] - comp->coord[0][0],

  466.                             comp->coord[1][1] - comp->coord[1][0], 0, avctx))

  467.         return AVERROR_INVALIDDATA;

  468.     csize = (comp->coord[0][1] - comp->coord[0][0]) *

  469.             (comp->coord[1][1] - comp->coord[1][0]);

  470.     if (comp->coord[0][1] - comp->coord[0][0] > 32768 ||

  471.         comp->coord[1][1] - comp->coord[1][0] > 32768) {

  472.         av_log(avctx, AV_LOG_ERROR, "component size too large\n");

  473.         return AVERROR_PATCHWELCOME;

  474.     }

  475. 

  476.     if (codsty->transform == FF_DWT97) {

  477.         csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->f_data);

  478.         comp->i_data = NULL;

  479.         comp->f_data = av_mallocz_array(csize, sizeof(*comp->f_data));

  480.         if (!comp->f_data)

  481.             return AVERROR(ENOMEM);

  482.     } else {

  483.         csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->i_data);

  484.         comp->f_data = NULL;

  485.         comp->i_data = av_mallocz_array(csize, sizeof(*comp->i_data));

  486.         if (!comp->i_data)

  487.             return AVERROR(ENOMEM);

  488.     }

  489.     comp->reslevel = av_mallocz_array(codsty->nreslevels, sizeof(*comp->reslevel));

  490.     if (!comp->reslevel)

  491.         return AVERROR(ENOMEM);

  492.     /* LOOP on resolution levels */

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

  494.         int declvl = codsty->nreslevels - reslevelno;    // N_L -r see  ISO/IEC 15444-1:2002 B.5

  495.         Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;

  496. 

  497.         /* Compute borders for each resolution level.

  498.          * Computation of trx_0, trx_1, try_0 and try_1.

  499.          * see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */

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

  501.             for (j = 0; j < 2; j++)

  502.                 reslevel->coord[i][j] =

  503.                     ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);

  504.         // update precincts size: 2^n value

  505.         reslevel->log2_prec_width  = codsty->log2_prec_widths[reslevelno];

  506.         reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];

  507.         if (!reslevel->log2_prec_width || !reslevel->log2_prec_height) {

  508.             return AVERROR_INVALIDDATA;

  509.         }

  510. 

  511.         /* Number of bands for each resolution level */

  512.         if (reslevelno == 0)

  513.             reslevel->nbands = 1;

  514.         else

  515.             reslevel->nbands = 3;

  516. 

  517.         /* Number of precincts which span the tile for resolution level reslevelno

  518.          * see B.6 in ISO/IEC 15444-1:2002 eq. B-16

  519.          * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)

  520.          * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)

  521.          * for Dcinema profiles in JPEG 2000

  522.          * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|

  523.          * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */

  524.         if (reslevel->coord[0][1] == reslevel->coord[0][0])

  525.             reslevel->num_precincts_x = 0;

  526.         else

  527.             reslevel->num_precincts_x =

  528.                 ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],

  529.                                         reslevel->log2_prec_width) -

  530.                 (reslevel->coord[0][0] >> reslevel->log2_prec_width);

  531. 

  532.         if (reslevel->coord[1][1] == reslevel->coord[1][0])

  533.             reslevel->num_precincts_y = 0;

  534.         else

  535.             reslevel->num_precincts_y =

  536.                 ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],

  537.                                         reslevel->log2_prec_height) -

  538.                 (reslevel->coord[1][0] >> reslevel->log2_prec_height);

  539. 

  540.         reslevel->band = av_mallocz_array(reslevel->nbands, sizeof(*reslevel->band));

  541.         if (!reslevel->band)

  542.             return AVERROR(ENOMEM);

  543. 

  544.         for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {

  545.             ret = init_band(avctx, reslevel,

  546.                             comp, codsty, qntsty,

  547.                             bandno, gbandno, reslevelno,

  548.                             cbps, dx, dy);

  549.             if (ret < 0)

  550.                 return ret;

  551.         }

  552.     }

  553.     return 0;

  554. }

  555. 

  556. void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)

  557. {

  558.     int reslevelno, bandno, cblkno, precno;

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

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

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

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

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

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

  565.                 tag_tree_zero(prec->zerobits, prec->nb_codeblocks_width, prec->nb_codeblocks_height);

  566.                 tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height);

  567.                 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {

  568.                     Jpeg2000Cblk *cblk = prec->cblk + cblkno;

  569.                     cblk->length = 0;

  570.                     cblk->lblock = 3;

  571.                 }

  572.             }

  573.         }

  574.     }

  575. }

  576. 

  577. void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)

  578. {

  579.     int reslevelno, bandno, precno;

  580.     for (reslevelno = 0;

  581.          comp->reslevel && reslevelno < codsty->nreslevels;

  582.          reslevelno++) {

  583.         Jpeg2000ResLevel *reslevel;

  584. 

  585.         if (!comp->reslevel)

  586.             continue;

  587. 

  588.         reslevel = comp->reslevel + reslevelno;

  589.         for (bandno = 0; bandno < reslevel->nbands; bandno++) {

  590.             Jpeg2000Band *band;

  591. 

  592.             if (!reslevel->band)

  593.                 continue;

  594. 

  595.             band = reslevel->band + bandno;

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

  597.                 if (band->prec) {

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

  599.                     int nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;

  600. 

  601.                     av_freep(&prec->zerobits);

  602.                     av_freep(&prec->cblkincl);

  603.                     if (prec->cblk) {

  604.                         int cblkno;

  605.                         for (cblkno = 0; cblkno < nb_code_blocks; cblkno ++) {

  606.                             Jpeg2000Cblk *cblk = &prec->cblk[cblkno];

  607.                             av_freep(&cblk->data);

  608.                             av_freep(&cblk->passes);

  609.                             av_freep(&cblk->lengthinc);

  610.                             av_freep(&cblk->data_start);

  611.                         }

  612.                         av_freep(&prec->cblk);

  613.                     }

  614.                 }

  615.             }

  616. 

  617.             av_freep(&band->prec);

  618.         }

  619.         av_freep(&reslevel->band);

  620.     }

  621. 

  622.     ff_dwt_destroy(&comp->dwt);

  623.     av_freep(&comp->reslevel);

  624.     av_freep(&comp->i_data);

  625.     av_freep(&comp->f_data);

  626. }