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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 Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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/common.h"

  30. #include "libavutil/mem.h"

  31. #include "avcodec.h"

  32. #include "jpeg2000.h"

  33. 

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

  35. 

  36. /* tag tree routines */

  37. 

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

  39. static int32_t tag_tree_size(uint16_t w, uint16_t h)

  40. {

  41.     uint32_t res = 0;

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

  43.         res += w * h;

  44.         if (res + 1 >= INT32_MAX)

  45.             return -1;

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

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

  48.     }

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

  50. }

  51. 

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

  53. {

  54.     int pw = w, ph = h;

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

  56.     int32_t tt_size;

  57. 

  58.     tt_size = tag_tree_size(w, h);

  59.     if (tt_size == -1)

  60.         return NULL;

  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. uint8_t ff_jpeg2000_sigctxno_lut[256][4];

  86. 

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

  88. {

  89.     int h, v, d;

  90. 

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

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

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

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

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

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

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

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

  99.     if (bandno < 3) {

  100.         if (bandno == 1)

  101.             FFSWAP(int, h, v);

  102.         if (h == 2)

  103.             return 8;

  104.         if (h == 1) {

  105.             if (v >= 1)

  106.                 return 7;

  107.             if (d >= 1)

  108.                 return 6;

  109.             return 5;

  110.         }

  111.         if (v == 2)

  112.             return 4;

  113.         if (v == 1)

  114.             return 3;

  115.         if (d >= 2)

  116.             return 2;

  117.         if (d == 1)

  118.             return 1;

  119.     } else {

  120.         if (d >= 3)

  121.             return 8;

  122.         if (d == 2) {

  123.             if (h + v >= 1)

  124.                 return 7;

  125.             return 6;

  126.         }

  127.         if (d == 1) {

  128.             if (h + v >= 2)

  129.                 return 5;

  130.             if (h + v == 1)

  131.                 return 4;

  132.             return 3;

  133.         }

  134.         if (h + v >= 2)

  135.             return 2;

  136.         if (h + v == 1)

  137.             return 1;

  138.     }

  139.     return 0;

  140. }

  141. 

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

  143. 

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

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

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

  147. 

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

  149. {

  150.     int vcontrib, hcontrib;

  151. 

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

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

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

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

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

  157. 

  158.     return ctxlbltab[hcontrib][vcontrib];

  159. }

  160. 

  161. void av_cold ff_jpeg2000_init_tier1_luts(void)

  162. {

  163.     int i, j;

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

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

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

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

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

  169.             ff_jpeg2000_sgnctxno_lut[i][j] =

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

  171. }

  172. 

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

  174.                                   int negative)

  175. {

  176.     x++;

  177.     y++;

  178.     t1->flags[y][x] |= JPEG2000_T1_SIG;

  179.     if (negative) {

  180.         t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;

  181.         t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;

  182.         t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;

  183.         t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;

  184.     } else {

  185.         t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W;

  186.         t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E;

  187.         t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N;

  188.         t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S;

  189.     }

  190.     t1->flags[y + 1][x + 1] |= JPEG2000_T1_SIG_NW;

  191.     t1->flags[y + 1][x - 1] |= JPEG2000_T1_SIG_NE;

  192.     t1->flags[y - 1][x + 1] |= JPEG2000_T1_SIG_SW;

  193.     t1->flags[y - 1][x - 1] |= JPEG2000_T1_SIG_SE;

  194. }

  195. 

  196. static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } };

  197. 

  198. int ff_jpeg2000_init_component(Jpeg2000Component *comp,

  199.                                Jpeg2000CodingStyle *codsty,

  200.                                Jpeg2000QuantStyle *qntsty,

  201.                                int cbps, int dx, int dy,

  202.                                AVCodecContext *avctx)

  203. {

  204.     uint8_t log2_band_prec_width, log2_band_prec_height;

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

  206.     uint32_t csize;

  207. 

  208.     if (!codsty->nreslevels2decode) {

  209.         av_log(avctx, AV_LOG_ERROR, "nreslevels2decode uninitialized\n");

  210.         return AVERROR_INVALIDDATA;

  211.     }

  212. 

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

  214.                                    codsty->nreslevels2decode - 1,

  215.                                    codsty->transform))

  216.         return ret;

  217.     // component size comp->coord is uint16_t so ir cannot overflow

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

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

  220. 

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

  222.         comp->i_data = NULL;

  223.         comp->f_data = av_malloc_array(csize, sizeof(*comp->f_data));

  224.         if (!comp->f_data)

  225.             return AVERROR(ENOMEM);

  226.     } else {

  227.         comp->f_data = NULL;

  228.         comp->i_data = av_malloc_array(csize, sizeof(*comp->i_data));

  229.         if (!comp->i_data)

  230.             return AVERROR(ENOMEM);

  231.     }

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

  233.     if (!comp->reslevel)

  234.         return AVERROR(ENOMEM);

  235.     /* LOOP on resolution levels */

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

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

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

  239. 

  240.         /* Compute borders for each resolution level.

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

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

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

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

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

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

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

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

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

  250. 

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

  252.         if (reslevelno == 0)

  253.             reslevel->nbands = 1;

  254.         else

  255.             reslevel->nbands = 3;

  256. 

  257.         /* Number of precincts wich span the tile for resolution level reslevelno

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

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

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

  261.          * for Dcinema profiles in JPEG 2000

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

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

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

  265.             reslevel->num_precincts_x = 0;

  266.         else

  267.             reslevel->num_precincts_x =

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

  269.                                         reslevel->log2_prec_width) -

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

  271. 

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

  273.             reslevel->num_precincts_y = 0;

  274.         else

  275.             reslevel->num_precincts_y =

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

  277.                                         reslevel->log2_prec_height) -

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

  279. 

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

  281.         if (!reslevel->band)

  282.             return AVERROR(ENOMEM);

  283. 

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

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

  286.             int cblkno, precno;

  287.             int nb_precincts;

  288. 

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

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

  291.             switch (qntsty->quantsty) {

  292.                 uint8_t gain;

  293.                 int numbps;

  294.             case JPEG2000_QSTY_NONE:

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

  296.                 band->f_stepsize = 1;

  297.                 break;

  298.             case JPEG2000_QSTY_SI:

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

  300.                 numbps = cbps +

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

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

  303.                                        2 + numbps - qntsty->expn[gbandno]);

  304.                 break;

  305.             case JPEG2000_QSTY_SE:

  306.                 /* Exponent quantization step.

  307.                  * Formula:

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

  309.                  * R_b = R_I + log2 (gain_b )

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

  311.                 /* TODO/WARN: value of log2 (gain_b ) not taken into account

  312.                  * but it works (compared to OpenJPEG). Why?

  313.                  * Further investigation needed. */

  314.                 gain            = cbps;

  315.                 band->f_stepsize  = pow(2.0, gain - qntsty->expn[gbandno]);

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

  317.                 break;

  318.             default:

  319.                 band->f_stepsize = 0;

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

  321.                 break;

  322.             }

  323.             /* FIXME: In openjepg code stespize = stepsize * 0.5. Why?

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

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

  326.                 band->f_stepsize *= 0.5;

  327. 

  328.             band->i_stepsize = band->f_stepsize * (1 << 16);

  329. 

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

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

  332.              * codeblock width and height is computed for

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

  334.             if (reslevelno == 0) {

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

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

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

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

  339.                             ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - comp->coord_o[i][0],

  340.                                                     declvl - 1);

  341.                 log2_band_prec_width  = reslevel->log2_prec_width;

  342.                 log2_band_prec_height = reslevel->log2_prec_height;

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

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

  345.                                                reslevel->log2_prec_width);

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

  347.                                                reslevel->log2_prec_height);

  348.             } else {

  349.                 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */

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

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

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

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

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

  355.                             ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - comp->coord_o[i][0] -

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

  357.                                                     declvl);

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

  359.                  * in coding/decoding function? */

  360. 

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

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

  363.                                                reslevel->log2_prec_width - 1);

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

  365.                                                reslevel->log2_prec_height - 1);

  366. 

  367.                 log2_band_prec_width  = reslevel->log2_prec_width  - 1;

  368.                 log2_band_prec_height = reslevel->log2_prec_height - 1;

  369.             }

  370. 

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

  372.                 band->coord[0][j] = ff_jpeg2000_ceildiv(band->coord[0][j], dx);

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

  374.                 band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy);

  375. 

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

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

  378.             if (!band->prec)

  379.                 return AVERROR(ENOMEM);

  380. 

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

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

  383.                 int nb_codeblocks;

  384. 

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

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

  387. 

  388.                 /* Compute P_x0 */

  389.                 prec->coord[0][0] = (precno % reslevel->num_precincts_x) *

  390.                                     (1 << log2_band_prec_width);

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

  392. 

  393.                 /* Compute P_y0 */

  394.                 prec->coord[1][0] = (precno / reslevel->num_precincts_x) *

  395.                                     (1 << log2_band_prec_height);

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

  397. 

  398.                 /* Compute P_x1 */

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

  400.                                     (1 << log2_band_prec_width);

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

  402. 

  403.                 /* Compute P_y1 */

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

  405.                                     (1 << log2_band_prec_height);

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

  407. 

  408.                 prec->nb_codeblocks_width =

  409.                     ff_jpeg2000_ceildivpow2(prec->coord[0][1] -

  410.                                             prec->coord[0][0],

  411.                                             band->log2_cblk_width);

  412.                 prec->nb_codeblocks_height =

  413.                     ff_jpeg2000_ceildivpow2(prec->coord[1][1] -

  414.                                             prec->coord[1][0],

  415.                                             band->log2_cblk_height);

  416. 

  417.                 /* Tag trees initialization */

  418.                 prec->cblkincl =

  419.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  420.                                               prec->nb_codeblocks_height);

  421.                 if (!prec->cblkincl)

  422.                     return AVERROR(ENOMEM);

  423. 

  424.                 prec->zerobits =

  425.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  426.                                               prec->nb_codeblocks_height);

  427.                 if (!prec->zerobits)

  428.                     return AVERROR(ENOMEM);

  429. 

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

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

  432.                 if (!prec->cblk)

  433.                     return AVERROR(ENOMEM);

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

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

  436.                     uint16_t Cx0, Cy0;

  437. 

  438.                     /* Compute coordinates of codeblocks */

  439.                     /* Compute Cx0*/

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

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

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

  443. 

  444.                     /* Compute Cy0*/

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

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

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

  448. 

  449.                     /* Compute Cx1 */

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

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

  452. 

  453.                     /* Compute Cy1 */

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

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

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

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

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

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

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

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

  462.                     }

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

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

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

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

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

  468.                     }

  469. 

  470.                     cblk->zero      = 0;

  471.                     cblk->lblock    = 3;

  472.                     cblk->length    = 0;

  473.                     cblk->lengthinc = 0;

  474.                     cblk->npasses   = 0;

  475.                 }

  476.             }

  477.         }

  478.     }

  479.     return 0;

  480. }

  481. 

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

  483. {

  484.     int reslevelno, bandno, precno;

  485.     for (reslevelno = 0;

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

  487.          reslevelno++) {

  488.         Jpeg2000ResLevel *reslevel;

  489. 

  490.         if (!comp->reslevel)

  491.             continue;

  492. 

  493.         reslevel = comp->reslevel + reslevelno;

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

  495.             Jpeg2000Band *band;

  496. 

  497.             if (!reslevel->band)

  498.                 continue;

  499. 

  500.             band = reslevel->band + bandno;

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

  502.                 Jpeg2000Prec *prec;

  503. 

  504.                 if (!band->prec)

  505.                     continue;

  506. 

  507.                 prec = band->prec + precno;

  508.                 av_freep(&prec->zerobits);

  509.                 av_freep(&prec->cblkincl);

  510.                 av_freep(&prec->cblk);

  511. 

  512.             }

  513. 

  514.             av_freep(&band->prec);

  515.         }

  516.         av_freep(&reslevel->band);

  517.     }

  518. 

  519.     ff_dwt_destroy(&comp->dwt);

  520.     av_freep(&comp->reslevel);

  521.     av_freep(&comp->i_data);

  522.     av_freep(&comp->f_data);

  523. }