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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(int w, int h)

  42. {

  43.     int64_t res = 0;

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

  45.         res += w * (int64_t)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) * t1->stride + x] |= JPEG2000_T1_SIG;

  176.     if (negative) {

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

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

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

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

  181.     } else {

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

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

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

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

  186.     }

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

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

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

  190.     t1->flags[(y - 1) * t1->stride + 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 } }; (unused)

  194. 

  195. static void init_band_stepsize(AVCodecContext *avctx,

  196.                                Jpeg2000Band *band,

  197.                                Jpeg2000CodingStyle *codsty,

  198.                                Jpeg2000QuantStyle *qntsty,

  199.                                int bandno, int gbandno, int reslevelno,

  200.                                int cbps)

  201. {

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

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

  204.     switch (qntsty->quantsty) {

  205.         uint8_t gain;

  206.     case JPEG2000_QSTY_NONE:

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

  208.         band->f_stepsize = 1;

  209.         break;

  210.     case JPEG2000_QSTY_SI:

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

  212. //         numbps = cbps +

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

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

  215. //                                2 + numbps - qntsty->expn[gbandno]);

  216. //         break;

  217.     case JPEG2000_QSTY_SE:

  218.         /* Exponent quantization step.

  219.          * Formula:

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

  221.          * R_b = R_I + log2 (gain_b )

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

  223.         gain            = cbps;

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

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

  226.         break;

  227.     default:

  228.         band->f_stepsize = 0;

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

  230.         break;

  231.     }

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

  233.         int lband = 0;

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

  235.             case 1:

  236.             case 2:

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

  238.                 lband = 1;

  239.                 break;

  240.             case 3:

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

  242.                 break;

  243.         }

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

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

  246.         }

  247.     }

  248. 

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

  250. 

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

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

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

  254.         band->f_stepsize *= 0.5;

  255. }

  256. 

  257. static int init_prec(Jpeg2000Band *band,

  258.                      Jpeg2000ResLevel *reslevel,

  259.                      Jpeg2000Component *comp,

  260.                      int precno, int bandno, int reslevelno,

  261.                      int log2_band_prec_width,

  262.                      int log2_band_prec_height)

  263. {

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

  265.     int nb_codeblocks, cblkno;

  266. 

  267.     prec->decoded_layers = 0;

  268. 

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

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

  271. 

  272.     /* Compute P_x0 */

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

  274.                         (1 << log2_band_prec_width);

  275. 

  276.     /* Compute P_y0 */

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

  278.                         (1 << log2_band_prec_height);

  279. 

  280.     /* Compute P_x1 */

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

  282.                         (1 << log2_band_prec_width);

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

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

  285. 

  286.     /* Compute P_y1 */

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

  288.                         (1 << log2_band_prec_height);

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

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

  291. 

  292.     prec->nb_codeblocks_width =

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

  294.                                 band->log2_cblk_width)

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

  296.     prec->nb_codeblocks_height =

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

  298.                                 band->log2_cblk_height)

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

  300. 

  301. 

  302.     /* Tag trees initialization */

  303.     prec->cblkincl =

  304.         ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  305.                                   prec->nb_codeblocks_height);

  306.     if (!prec->cblkincl)

  307.         return AVERROR(ENOMEM);

  308. 

  309.     prec->zerobits =

  310.         ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  311.                                   prec->nb_codeblocks_height);

  312.     if (!prec->zerobits)

  313.         return AVERROR(ENOMEM);

  314. 

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

  316.         prec->cblk = NULL;

  317.         return AVERROR(ENOMEM);

  318.     }

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

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

  321.     if (!prec->cblk)

  322.         return AVERROR(ENOMEM);

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

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

  325.         int Cx0, Cy0;

  326. 

  327.         /* Compute coordinates of codeblocks */

  328.         /* Compute Cx0*/

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

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

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

  332. 

  333.         /* Compute Cy0*/

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

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

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

  337. 

  338.         /* Compute Cx1 */

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

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

  341. 

  342.         /* Compute Cy1 */

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

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

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

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

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

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

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

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

  351.         }

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

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

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

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

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

  357.         }

  358. 

  359.         cblk->zero      = 0;

  360.         cblk->lblock    = 3;

  361.         cblk->length    = 0;

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

  363.         cblk->npasses   = 0;

  364.     }

  365. 

  366.     return 0;

  367. }

  368. 

  369. static int init_band(AVCodecContext *avctx,

  370.                      Jpeg2000ResLevel *reslevel,

  371.                      Jpeg2000Component *comp,

  372.                      Jpeg2000CodingStyle *codsty,

  373.                      Jpeg2000QuantStyle *qntsty,

  374.                      int bandno, int gbandno, int reslevelno,

  375.                      int cbps, int dx, int dy)

  376. {

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

  378.     uint8_t log2_band_prec_width, log2_band_prec_height;

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

  380.     int precno;

  381.     int nb_precincts;

  382.     int i, j, ret;

  383. 

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

  385. 

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

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

  388.      * codeblock width and height is computed for

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

  390.     if (reslevelno == 0) {

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

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

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

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

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

  396.                                             declvl - 1);

  397.         log2_band_prec_width  = reslevel->log2_prec_width;

  398.         log2_band_prec_height = reslevel->log2_prec_height;

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

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

  401.                                        reslevel->log2_prec_width);

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

  403.                                        reslevel->log2_prec_height);

  404.     } else {

  405.         /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */

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

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

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

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

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

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

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

  413.                                             declvl);

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

  415.          * in coding/decoding function? */

  416. 

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

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

  419.                                        reslevel->log2_prec_width - 1);

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

  421.                                        reslevel->log2_prec_height - 1);

  422. 

  423.         log2_band_prec_width  = reslevel->log2_prec_width  - 1;

  424.         log2_band_prec_height = reslevel->log2_prec_height - 1;

  425.     }

  426. 

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

  428.         band->prec = NULL;

  429.         return AVERROR(ENOMEM);

  430.     }

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

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

  433.     if (!band->prec)

  434.         return AVERROR(ENOMEM);

  435. 

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

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

  438.                         precno, bandno, reslevelno,

  439.                         log2_band_prec_width, log2_band_prec_height);

  440.         if (ret < 0)

  441.             return ret;

  442.     }

  443. 

  444.     return 0;

  445. }

  446. 

  447. int ff_jpeg2000_init_component(Jpeg2000Component *comp,

  448.                                Jpeg2000CodingStyle *codsty,

  449.                                Jpeg2000QuantStyle *qntsty,

  450.                                int cbps, int dx, int dy,

  451.                                AVCodecContext *avctx)

  452. {

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

  454.     uint32_t csize;

  455. 

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

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

  458.         return AVERROR_INVALIDDATA;

  459.     }

  460. 

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

  462.                                    codsty->nreslevels2decode - 1,

  463.                                    codsty->transform))

  464.         return ret;

  465. 

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

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

  468.         return AVERROR_INVALIDDATA;

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

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

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

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

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

  474.         return AVERROR_PATCHWELCOME;

  475.     }

  476. 

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

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

  479.         comp->i_data = NULL;

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

  481.         if (!comp->f_data)

  482.             return AVERROR(ENOMEM);

  483.     } else {

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

  485.         comp->f_data = NULL;

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

  487.         if (!comp->i_data)

  488.             return AVERROR(ENOMEM);

  489.     }

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

  491.     if (!comp->reslevel)

  492.         return AVERROR(ENOMEM);

  493.     /* LOOP on resolution levels */

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

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

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

  497. 

  498.         /* Compute borders for each resolution level.

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

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

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

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

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

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

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

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

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

  508. 

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

  510.         if (reslevelno == 0)

  511.             reslevel->nbands = 1;

  512.         else

  513.             reslevel->nbands = 3;

  514. 

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

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

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

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

  519.          * for Dcinema profiles in JPEG 2000

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

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

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

  523.             reslevel->num_precincts_x = 0;

  524.         else

  525.             reslevel->num_precincts_x =

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

  527.                                         reslevel->log2_prec_width) -

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

  529. 

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

  531.             reslevel->num_precincts_y = 0;

  532.         else

  533.             reslevel->num_precincts_y =

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

  535.                                         reslevel->log2_prec_height) -

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

  537. 

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

  539.         if (!reslevel->band)

  540.             return AVERROR(ENOMEM);

  541. 

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

  543.             ret = init_band(avctx, reslevel,

  544.                             comp, codsty, qntsty,

  545.                             bandno, gbandno, reslevelno,

  546.                             cbps, dx, dy);

  547.             if (ret < 0)

  548.                 return ret;

  549.         }

  550.     }

  551.     return 0;

  552. }

  553. 

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

  555. {

  556.     int reslevelno, bandno, cblkno, precno;

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

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

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

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

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

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

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

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

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

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

  567.                     cblk->length = 0;

  568.                     cblk->lblock = 3;

  569.                 }

  570.             }

  571.         }

  572.     }

  573. }

  574. 

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

  576. {

  577.     int reslevelno, bandno, precno;

  578.     for (reslevelno = 0;

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

  580.          reslevelno++) {

  581.         Jpeg2000ResLevel *reslevel;

  582. 

  583.         if (!comp->reslevel)

  584.             continue;

  585. 

  586.         reslevel = comp->reslevel + reslevelno;

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

  588.             Jpeg2000Band *band;

  589. 

  590.             if (!reslevel->band)

  591.                 continue;

  592. 

  593.             band = reslevel->band + bandno;

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

  595.                 if (band->prec) {

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

  597.                     av_freep(&prec->zerobits);

  598.                     av_freep(&prec->cblkincl);

  599.                     av_freep(&prec->cblk);

  600.                 }

  601.             }

  602. 

  603.             av_freep(&band->prec);

  604.         }

  605.         av_freep(&reslevel->band);

  606.     }

  607. 

  608.     ff_dwt_destroy(&comp->dwt);

  609.     av_freep(&comp->reslevel);

  610.     av_freep(&comp->i_data);

  611.     av_freep(&comp->f_data);

  612. }