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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) * t1->stride + x] |= JPEG2000_T1_SIG;

  175.     if (negative) {

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

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

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

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

  180.     } else {

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

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

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

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

  185.     }

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

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

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

  189.     t1->flags[(y - 1) * t1->stride + 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.         csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->f_data);

  219.         comp->i_data = NULL;

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

  221.         if (!comp->f_data)

  222.             return AVERROR(ENOMEM);

  223.     } else {

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

  225.         comp->f_data = NULL;

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

  227.         if (!comp->i_data)

  228.             return AVERROR(ENOMEM);

  229.     }

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

  231.     if (!comp->reslevel)

  232.         return AVERROR(ENOMEM);

  233.     /* LOOP on resolution levels */

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

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

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

  237. 

  238.         /* Compute borders for each resolution level.

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

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

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

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

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

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

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

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

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

  248. 

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

  250.         if (reslevelno == 0)

  251.             reslevel->nbands = 1;

  252.         else

  253.             reslevel->nbands = 3;

  254. 

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

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

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

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

  259.          * for Dcinema profiles in JPEG 2000

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

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

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

  263.             reslevel->num_precincts_x = 0;

  264.         else

  265.             reslevel->num_precincts_x =

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

  267.                                         reslevel->log2_prec_width) -

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

  269. 

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

  271.             reslevel->num_precincts_y = 0;

  272.         else

  273.             reslevel->num_precincts_y =

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

  275.                                         reslevel->log2_prec_height) -

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

  277. 

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

  279.         if (!reslevel->band)

  280.             return AVERROR(ENOMEM);

  281. 

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

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

  284.             int cblkno, precno;

  285.             int nb_precincts;

  286. 

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

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

  289.             switch (qntsty->quantsty) {

  290.                 uint8_t gain;

  291.             case JPEG2000_QSTY_NONE:

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

  293.                 band->f_stepsize = 1;

  294.                 break;

  295.             case JPEG2000_QSTY_SI:

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

  297. //                 numbps = cbps +

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

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

  300. //                                        2 + numbps - qntsty->expn[gbandno]);

  301. //                 break;

  302.             case JPEG2000_QSTY_SE:

  303.                 /* Exponent quantization step.

  304.                  * Formula:

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

  306.                  * R_b = R_I + log2 (gain_b )

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

  308.                 gain            = cbps;

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

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

  311.                 break;

  312.             default:

  313.                 band->f_stepsize = 0;

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

  315.                 break;

  316.             }

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

  318.                 int lband = 0;

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

  320.                     case 1:

  321.                     case 2:

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

  323.                         lband = 1;

  324.                         break;

  325.                     case 3:

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

  327.                         break;

  328.                 }

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

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

  331.                 }

  332.             }

  333. 

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

  335. 

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

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

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

  339.                 band->f_stepsize *= 0.5;

  340. 

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

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

  343.              * codeblock width and height is computed for

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

  345.             if (reslevelno == 0) {

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

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

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

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

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

  351.                                                     declvl - 1);

  352.                 log2_band_prec_width  = reslevel->log2_prec_width;

  353.                 log2_band_prec_height = reslevel->log2_prec_height;

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

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

  356.                                                reslevel->log2_prec_width);

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

  358.                                                reslevel->log2_prec_height);

  359.             } else {

  360.                 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */

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

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

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

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

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

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

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

  368.                                                     declvl);

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

  370.                  * in coding/decoding function? */

  371. 

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

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

  374.                                                reslevel->log2_prec_width - 1);

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

  376.                                                reslevel->log2_prec_height - 1);

  377. 

  378.                 log2_band_prec_width  = reslevel->log2_prec_width  - 1;

  379.                 log2_band_prec_height = reslevel->log2_prec_height - 1;

  380.             }

  381. 

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

  383.                 band->prec = NULL;

  384.                 return AVERROR(ENOMEM);

  385.             }

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

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

  388.             if (!band->prec)

  389.                 return AVERROR(ENOMEM);

  390. 

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

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

  393.                 int nb_codeblocks;

  394. 

  395.                 prec->decoded_layers = 0;

  396. 

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

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

  399. 

  400.                 /* Compute P_x0 */

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

  402.                                     (1 << log2_band_prec_width);

  403. 

  404.                 /* Compute P_y0 */

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

  406.                                     (1 << log2_band_prec_height);

  407. 

  408.                 /* Compute P_x1 */

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

  410.                                     (1 << log2_band_prec_width);

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

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

  413. 

  414.                 /* Compute P_y1 */

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

  416.                                     (1 << log2_band_prec_height);

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

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

  419. 

  420.                 prec->nb_codeblocks_width =

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

  422.                                             band->log2_cblk_width)

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

  424.                 prec->nb_codeblocks_height =

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

  426.                                             band->log2_cblk_height)

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

  428. 

  429. 

  430.                 /* Tag trees initialization */

  431.                 prec->cblkincl =

  432.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  433.                                               prec->nb_codeblocks_height);

  434.                 if (!prec->cblkincl)

  435.                     return AVERROR(ENOMEM);

  436. 

  437.                 prec->zerobits =

  438.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  439.                                               prec->nb_codeblocks_height);

  440.                 if (!prec->zerobits)

  441.                     return AVERROR(ENOMEM);

  442. 

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

  444.                     prec->cblk = NULL;

  445.                     return AVERROR(ENOMEM);

  446.                 }

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

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

  449.                 if (!prec->cblk)

  450.                     return AVERROR(ENOMEM);

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

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

  453.                     uint16_t Cx0, Cy0;

  454. 

  455.                     /* Compute coordinates of codeblocks */

  456.                     /* Compute Cx0*/

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

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

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

  460. 

  461.                     /* Compute Cy0*/

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

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

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

  465. 

  466.                     /* Compute Cx1 */

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

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

  469. 

  470.                     /* Compute Cy1 */

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

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

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

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

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

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

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

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

  479.                     }

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

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

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

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

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

  485.                     }

  486. 

  487.                     cblk->zero      = 0;

  488.                     cblk->lblock    = 3;

  489.                     cblk->length    = 0;

  490.                     memset(cblk->lengthinc, 0, sizeof(cblk->lengthinc));

  491.                     cblk->npasses   = 0;

  492.                 }

  493.             }

  494.         }

  495.     }

  496.     return 0;

  497. }

  498. 

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

  500. {

  501.     int reslevelno, bandno, cblkno, precno;

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

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

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

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

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

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

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

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

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

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

  512.                     cblk->length = 0;

  513.                     cblk->lblock = 3;

  514.                 }

  515.             }

  516.         }

  517.     }

  518. }

  519. 

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

  521. {

  522.     int reslevelno, bandno, precno;

  523.     for (reslevelno = 0;

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

  525.          reslevelno++) {

  526.         Jpeg2000ResLevel *reslevel;

  527. 

  528.         if (!comp->reslevel)

  529.             continue;

  530. 

  531.         reslevel = comp->reslevel + reslevelno;

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

  533.             Jpeg2000Band *band;

  534. 

  535.             if (!reslevel->band)

  536.                 continue;

  537. 

  538.             band = reslevel->band + bandno;

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

  540.                 if (band->prec) {

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

  542.                     av_freep(&prec->zerobits);

  543.                     av_freep(&prec->cblkincl);

  544.                     av_freep(&prec->cblk);

  545.                 }

  546.             }

  547. 

  548.             av_freep(&band->prec);

  549.         }

  550.         av_freep(&reslevel->band);

  551.     }

  552. 

  553.     ff_dwt_destroy(&comp->dwt);

  554.     av_freep(&comp->reslevel);

  555.     av_freep(&comp->i_data);

  556.     av_freep(&comp->f_data);

  557. }