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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 "jpeg2000.h"

  35. 

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

  37. 

  38. /* tag tree routines */

  39. 

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

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

  42. {

  43.     uint32_t res = 0;

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

  45.         res += w * h;

  46.         av_assert0(res + 1 < INT32_MAX);

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

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

  49.     }

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

  51. }

  52. 

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

  54. {

  55.     int pw = w, ph = h;

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

  57.     int32_t tt_size;

  58. 

  59.     tt_size = tag_tree_size(w, h);

  60. 

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

  62.     if (!res)

  63.         return NULL;

  64. 

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

  66.         int i, j;

  67.         pw = w;

  68.         ph = h;

  69. 

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

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

  72.         t2 = t + pw * ph;

  73. 

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

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

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

  77. 

  78.         t = t2;

  79.     }

  80.     t[0].parent = NULL;

  81.     return res;

  82. }

  83. 

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

  85. {

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

  87. 

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

  89.         t[i].val = 0;

  90.         t[i].vis = 0;

  91.     }

  92. }

  93. 

  94. uint8_t ff_jpeg2000_sigctxno_lut[256][4];

  95. 

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

  97. {

  98.     int h, v, d;

  99. 

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

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

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

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

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

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

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

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

  108. 

  109.     if (bandno < 3) {

  110.         if (bandno == 1)

  111.             FFSWAP(int, h, v);

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

  113.         if (h == 1) {

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

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

  116.             return 5;

  117.         }

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

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

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

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

  122.     } else {

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

  124.         if (d == 2) {

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

  126.             return 6;

  127.         }

  128.         if (d == 1) {

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

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

  131.             return 3;

  132.         }

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

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

  135.     }

  136.     return 0;

  137. }

  138. 

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

  140. 

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

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

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

  144. 

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

  146. {

  147.     int vcontrib, hcontrib;

  148. 

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

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

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

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

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

  154. 

  155.     return ctxlbltab[hcontrib][vcontrib];

  156. }

  157. 

  158. void av_cold ff_jpeg2000_init_tier1_luts(void)

  159. {

  160.     int i, j;

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

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

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

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

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

  166.             ff_jpeg2000_sgnctxno_lut[i][j] =

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

  168. }

  169. 

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

  171.                                   int negative)

  172. {

  173.     x++;

  174.     y++;

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

  176.     if (negative) {

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

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

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

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

  181.     } else {

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

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

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

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

  186.     }

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

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

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

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

  191. }

  192. 

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

  194. 

  195. int ff_jpeg2000_init_component(Jpeg2000Component *comp,

  196.                                Jpeg2000CodingStyle *codsty,

  197.                                Jpeg2000QuantStyle *qntsty,

  198.                                int cbps, int dx, int dy,

  199.                                AVCodecContext *avctx)

  200. {

  201.     uint8_t log2_band_prec_width, log2_band_prec_height;

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

  203.     uint32_t csize;

  204. 

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

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

  207.         return AVERROR_INVALIDDATA;

  208.     }

  209. 

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

  211.                                    codsty->nreslevels2decode - 1,

  212.                                    codsty->transform))

  213.         return ret;

  214. 

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

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

  217.         return AVERROR_INVALIDDATA;

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

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

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

  221.         comp->coord[1][1] > 32768) {

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

  223.         return AVERROR_PATCHWELCOME;

  224.     }

  225. 

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

  227.         comp->i_data = NULL;

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

  229.         if (!comp->f_data)

  230.             return AVERROR(ENOMEM);

  231.     } else {

  232.         comp->f_data = NULL;

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

  234.         if (!comp->i_data)

  235.             return AVERROR(ENOMEM);

  236.     }

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

  238.     if (!comp->reslevel)

  239.         return AVERROR(ENOMEM);

  240.     /* LOOP on resolution levels */

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

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

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

  244. 

  245.         /* Compute borders for each resolution level.

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

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

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

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

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

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

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

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

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

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

  256.             return AVERROR_INVALIDDATA;

  257.         }

  258. 

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

  260.         if (reslevelno == 0)

  261.             reslevel->nbands = 1;

  262.         else

  263.             reslevel->nbands = 3;

  264. 

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

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

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

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

  269.          * for Dcinema profiles in JPEG 2000

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

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

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

  273.             reslevel->num_precincts_x = 0;

  274.         else

  275.             reslevel->num_precincts_x =

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

  277.                                         reslevel->log2_prec_width) -

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

  279. 

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

  281.             reslevel->num_precincts_y = 0;

  282.         else

  283.             reslevel->num_precincts_y =

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

  285.                                         reslevel->log2_prec_height) -

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

  287. 

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

  289.         if (!reslevel->band)

  290.             return AVERROR(ENOMEM);

  291. 

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

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

  294.             int cblkno, precno;

  295.             int nb_precincts;

  296. 

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

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

  299.             switch (qntsty->quantsty) {

  300.                 uint8_t gain;

  301.                 int numbps;

  302.             case JPEG2000_QSTY_NONE:

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

  304.                 band->f_stepsize = 1;

  305.                 break;

  306.             case JPEG2000_QSTY_SI:

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

  308.                 numbps = cbps +

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

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

  311.                                        2 + numbps - qntsty->expn[gbandno]);

  312.                 break;

  313.             case JPEG2000_QSTY_SE:

  314.                 /* Exponent quantization step.

  315.                  * Formula:

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

  317.                  * R_b = R_I + log2 (gain_b )

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

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

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

  321.                  * Further investigation needed. */

  322.                 gain            = cbps;

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

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

  325.                 break;

  326.             default:

  327.                 band->f_stepsize = 0;

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

  329.                 break;

  330.             }

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

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

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

  334.                 band->f_stepsize *= 0.5;

  335. 

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

  337. 

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

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

  340.              * codeblock width and height is computed for

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

  342.             if (reslevelno == 0) {

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

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

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

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

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

  348.                                                     declvl - 1);

  349.                 log2_band_prec_width  = reslevel->log2_prec_width;

  350.                 log2_band_prec_height = reslevel->log2_prec_height;

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

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

  353.                                                reslevel->log2_prec_width);

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

  355.                                                reslevel->log2_prec_height);

  356.             } else {

  357.                 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */

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

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

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

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

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

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

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

  365.                                                     declvl);

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

  367.                  * in coding/decoding function? */

  368. 

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

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

  371.                                                reslevel->log2_prec_width - 1);

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

  373.                                                reslevel->log2_prec_height - 1);

  374. 

  375.                 log2_band_prec_width  = reslevel->log2_prec_width  - 1;

  376.                 log2_band_prec_height = reslevel->log2_prec_height - 1;

  377.             }

  378. 

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

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

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

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

  383. 

  384.             band->prec = av_mallocz_array(reslevel->num_precincts_x *

  385.                                           (uint64_t)reslevel->num_precincts_y,

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

  387.             if (!band->prec)

  388.                 return AVERROR(ENOMEM);

  389. 

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

  391. 

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

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

  394. 

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

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

  397. 

  398.                 /* Compute P_x0 */

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

  400.                                     (1 << log2_band_prec_width);

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

  402. 

  403.                 /* Compute P_y0 */

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

  405.                                     (1 << log2_band_prec_height);

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

  407. 

  408.                 /* Compute P_x1 */

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

  410.                                     (1 << log2_band_prec_width);

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

  412. 

  413.                 /* Compute P_y1 */

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

  415.                                     (1 << log2_band_prec_height);

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

  417. 

  418.                 prec->nb_codeblocks_width =

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

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

  421.                                             band->log2_cblk_width);

  422.                 prec->nb_codeblocks_height =

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

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

  425.                                             band->log2_cblk_height);

  426. 

  427.                 /* Tag trees initialization */

  428.                 prec->cblkincl =

  429.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  430.                                               prec->nb_codeblocks_height);

  431.                 if (!prec->cblkincl)

  432.                     return AVERROR(ENOMEM);

  433. 

  434.                 prec->zerobits =

  435.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  436.                                               prec->nb_codeblocks_height);

  437.                 if (!prec->zerobits)

  438.                     return AVERROR(ENOMEM);

  439. 

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

  441.                                               (uint64_t)prec->nb_codeblocks_height,

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

  443.                 if (!prec->cblk)

  444.                     return AVERROR(ENOMEM);

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

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

  447.                     uint16_t Cx0, Cy0;

  448. 

  449.                     /* Compute coordinates of codeblocks */

  450.                     /* Compute Cx0*/

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

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

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

  454. 

  455.                     /* Compute Cy0*/

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

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

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

  459. 

  460.                     /* Compute Cx1 */

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

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

  463. 

  464.                     /* Compute Cy1 */

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

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

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

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

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

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

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

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

  473.                     }

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

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

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

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

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

  479.                     }

  480. 

  481.                     cblk->zero      = 0;

  482.                     cblk->lblock    = 3;

  483.                     cblk->length    = 0;

  484.                     cblk->lengthinc = 0;

  485.                     cblk->npasses   = 0;

  486.                 }

  487.             }

  488.         }

  489.     }

  490.     return 0;

  491. }

  492. 

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

  494. {

  495.     int reslevelno, bandno, cblkno, precno;

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

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

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

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

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

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

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

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

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

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

  506.                     cblk->length = 0;

  507.                     cblk->lblock = 3;

  508.                 }

  509.             }

  510.         }

  511.     }

  512. }

  513. 

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

  515. {

  516.     int reslevelno, bandno, precno;

  517.     for (reslevelno = 0;

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

  519.          reslevelno++) {

  520.         Jpeg2000ResLevel *reslevel;

  521. 

  522.         if (!comp->reslevel)

  523.             continue;

  524. 

  525.         reslevel = comp->reslevel + reslevelno;

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

  527.             Jpeg2000Band *band;

  528. 

  529.             if (!reslevel->band)

  530.                 continue;

  531. 

  532.             band = reslevel->band + bandno;

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

  534.                 if (band->prec) {

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

  536.                     av_freep(&prec->zerobits);

  537.                     av_freep(&prec->cblkincl);

  538.                     av_freep(&prec->cblk);

  539.                 }

  540.             }

  541. 

  542.             av_freep(&band->prec);

  543.         }

  544.         av_freep(&reslevel->band);

  545.     }

  546. 

  547.     ff_dwt_destroy(&comp->dwt);

  548.     av_freep(&comp->reslevel);

  549.     av_freep(&comp->i_data);

  550.     av_freep(&comp->f_data);

  551. }