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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/mem.h"

  32. #include "avcodec.h"

  33. #include "jpeg2000.h"

  34. 

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

  36. 

  37. /* tag tree routines */

  38. 

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

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

  41. {

  42.     uint32_t res = 0;

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

  44.         res += w * h;

  45.         av_assert0(res + 1 < INT32_MAX);

  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. 

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

  61.     if (!res)

  62.         return NULL;

  63. 

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

  65.         int i, j;

  66.         pw = w;

  67.         ph = h;

  68. 

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

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

  71.         t2 = t + pw * ph;

  72. 

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

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

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

  76. 

  77.         t = t2;

  78.     }

  79.     t[0].parent = NULL;

  80.     return res;

  81. }

  82. 

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

  84. {

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

  86. 

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

  88.         t[i].val = 0;

  89.         t[i].vis = 0;

  90.     }

  91. }

  92. 

  93. uint8_t ff_jpeg2000_sigctxno_lut[256][4];

  94. 

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

  96. {

  97.     int h, v, d;

  98. 

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

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

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

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

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

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

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

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

  107. 

  108.     if (bandno < 3) {

  109.         if (bandno == 1)

  110.             FFSWAP(int, h, v);

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

  112.         if (h == 1) {

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

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

  115.             return 5;

  116.         }

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

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

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

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

  121.     } else {

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

  123.         if (d == 2) {

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

  125.             return 6;

  126.         }

  127.         if (d == 1) {

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

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

  130.             return 3;

  131.         }

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

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

  134.     }

  135.     return 0;

  136. }

  137. 

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

  139. 

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

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

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

  143. 

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

  145. {

  146.     int vcontrib, hcontrib;

  147. 

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

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

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

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

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

  153. 

  154.     return ctxlbltab[hcontrib][vcontrib];

  155. }

  156. 

  157. void av_cold ff_jpeg2000_init_tier1_luts(void)

  158. {

  159.     int i, j;

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

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

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

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

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

  165.             ff_jpeg2000_sgnctxno_lut[i][j] =

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

  167. }

  168. 

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

  170.                                   int negative)

  171. {

  172.     x++;

  173.     y++;

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

  175.     if (negative) {

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

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

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

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

  180.     } else {

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

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

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

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

  185.     }

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

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

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

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

  190. }

  191. 

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

  193. 

  194. int ff_jpeg2000_init_component(Jpeg2000Component *comp,

  195.                                Jpeg2000CodingStyle *codsty,

  196.                                Jpeg2000QuantStyle *qntsty,

  197.                                int cbps, int dx, int dy,

  198.                                AVCodecContext *avctx)

  199. {

  200.     uint8_t log2_band_prec_width, log2_band_prec_height;

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

  202.     uint32_t csize;

  203. 

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

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

  206.         return AVERROR_INVALIDDATA;

  207.     }

  208. 

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

  210.                                    codsty->nreslevels2decode - 1,

  211.                                    codsty->transform))

  212.         return ret;

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

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

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

  216. 

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

  218.         comp->i_data = NULL;

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

  220.         if (!comp->f_data)

  221.             return AVERROR(ENOMEM);

  222.     } else {

  223.         comp->f_data = NULL;

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

  225.         if (!comp->i_data)

  226.             return AVERROR(ENOMEM);

  227.     }

  228.     comp->reslevel = av_calloc(codsty->nreslevels, sizeof(*comp->reslevel));

  229.     if (!comp->reslevel)

  230.         return AVERROR(ENOMEM);

  231.     /* LOOP on resolution levels */

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

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

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

  235. 

  236.         /* Compute borders for each resolution level.

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

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

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

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

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

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

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

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

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

  246. 

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

  248.         if (reslevelno == 0)

  249.             reslevel->nbands = 1;

  250.         else

  251.             reslevel->nbands = 3;

  252. 

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

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

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

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

  257.          * for Dcinema profiles in JPEG 2000

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

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

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

  261.             reslevel->num_precincts_x = 0;

  262.         else

  263.             reslevel->num_precincts_x =

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

  265.                                         reslevel->log2_prec_width) -

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

  267. 

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

  269.             reslevel->num_precincts_y = 0;

  270.         else

  271.             reslevel->num_precincts_y =

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

  273.                                         reslevel->log2_prec_height) -

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

  275. 

  276.         reslevel->band = av_calloc(reslevel->nbands, sizeof(*reslevel->band));

  277.         if (!reslevel->band)

  278.             return AVERROR(ENOMEM);

  279. 

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

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

  282.             int cblkno, precno;

  283.             int nb_precincts;

  284. 

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

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

  287.             switch (qntsty->quantsty) {

  288.                 uint8_t gain;

  289.                 int numbps;

  290.             case JPEG2000_QSTY_NONE:

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

  292.                 band->f_stepsize = 1;

  293.                 break;

  294.             case JPEG2000_QSTY_SI:

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

  296.                 numbps = cbps +

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

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

  299.                                        2 + numbps - qntsty->expn[gbandno]);

  300.                 break;

  301.             case JPEG2000_QSTY_SE:

  302.                 /* Exponent quantization step.

  303.                  * Formula:

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

  305.                  * R_b = R_I + log2 (gain_b )

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

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

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

  309.                  * Further investigation needed. */

  310.                 gain            = cbps;

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

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

  313.                 break;

  314.             default:

  315.                 band->f_stepsize = 0;

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

  317.                 break;

  318.             }

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

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

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

  322.                 band->f_stepsize *= 0.5;

  323. 

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

  325. 

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

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

  328.              * codeblock width and height is computed for

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

  330.             if (reslevelno == 0) {

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

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

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

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

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

  336.                                                     declvl - 1);

  337.                 log2_band_prec_width  = reslevel->log2_prec_width;

  338.                 log2_band_prec_height = reslevel->log2_prec_height;

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

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

  341.                                                reslevel->log2_prec_width);

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

  343.                                                reslevel->log2_prec_height);

  344.             } else {

  345.                 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */

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

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

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

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

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

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

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

  353.                                                     declvl);

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

  355.                  * in coding/decoding function? */

  356. 

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

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

  359.                                                reslevel->log2_prec_width - 1);

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

  361.                                                reslevel->log2_prec_height - 1);

  362. 

  363.                 log2_band_prec_width  = reslevel->log2_prec_width  - 1;

  364.                 log2_band_prec_height = reslevel->log2_prec_height - 1;

  365.             }

  366. 

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

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

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

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

  371. 

  372.             band->prec = av_calloc(reslevel->num_precincts_x *

  373.                                          (uint64_t)reslevel->num_precincts_y,

  374.                                          sizeof(*band->prec));

  375.             if (!band->prec)

  376.                 return AVERROR(ENOMEM);

  377. 

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

  379. 

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

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

  382. 

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

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

  385. 

  386.                 /* Compute P_x0 */

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

  388.                                     (1 << log2_band_prec_width);

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

  390. 

  391.                 /* Compute P_y0 */

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

  393.                                     (1 << log2_band_prec_height);

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

  395. 

  396.                 /* Compute P_x1 */

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

  398.                                     (1 << log2_band_prec_width);

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

  400. 

  401.                 /* Compute P_y1 */

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

  403.                                     (1 << log2_band_prec_height);

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

  405. 

  406.                 prec->nb_codeblocks_width =

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

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

  409.                                             band->log2_cblk_width);

  410.                 prec->nb_codeblocks_height =

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

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

  413.                                             band->log2_cblk_height);

  414. 

  415.                 /* Tag trees initialization */

  416.                 prec->cblkincl =

  417.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  418.                                               prec->nb_codeblocks_height);

  419.                 if (!prec->cblkincl)

  420.                     return AVERROR(ENOMEM);

  421. 

  422.                 prec->zerobits =

  423.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  424.                                               prec->nb_codeblocks_height);

  425.                 if (!prec->zerobits)

  426.                     return AVERROR(ENOMEM);

  427. 

  428.                 prec->cblk = av_mallocz_array(prec->nb_codeblocks_width *

  429.                                               (uint64_t)prec->nb_codeblocks_height,

  430.                                               sizeof(*prec->cblk));

  431.                 if (!prec->cblk)

  432.                     return AVERROR(ENOMEM);

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

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

  435.                     uint16_t Cx0, Cy0;

  436. 

  437.                     /* Compute coordinates of codeblocks */

  438.                     /* Compute Cx0*/

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

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

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

  442. 

  443.                     /* Compute Cy0*/

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

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

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

  447. 

  448.                     /* Compute Cx1 */

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

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

  451. 

  452.                     /* Compute Cy1 */

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

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

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

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

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

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

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

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

  461.                     }

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

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

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

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

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

  467.                     }

  468. 

  469.                     cblk->zero      = 0;

  470.                     cblk->lblock    = 3;

  471.                     cblk->length    = 0;

  472.                     cblk->lengthinc = 0;

  473.                     cblk->npasses   = 0;

  474.                 }

  475.             }

  476.         }

  477.     }

  478.     return 0;

  479. }

  480. 

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

  482. {

  483.     int reslevelno, bandno, cblkno, precno;

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

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

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

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

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

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

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

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

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

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

  494.                     cblk->length = 0;

  495.                     cblk->lblock = 3;

  496.                 }

  497.             }

  498.         }

  499.     }

  500. }

  501. 

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

  503. {

  504.     int reslevelno, bandno, precno;

  505.     for (reslevelno = 0;

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

  507.          reslevelno++) {

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

  509. 

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

  511.             if (reslevel->band) {

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

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

  514.                     if (band->prec) {

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

  516.                         av_freep(&prec->zerobits);

  517.                         av_freep(&prec->cblkincl);

  518.                         av_freep(&prec->cblk);

  519.                     }

  520.                 }

  521. 

  522.                 av_freep(&band->prec);

  523.             }

  524.         }

  525.         av_freep(&reslevel->band);

  526.     }

  527. 

  528.     ff_dwt_destroy(&comp->dwt);

  529.     av_freep(&comp->reslevel);

  530.     av_freep(&comp->i_data);

  531.     av_freep(&comp->f_data);

  532. }