falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98927 Commits
32 Branches
646MB
Tree: f0e33119e4
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'f0e33119e4'
${ noResults }
FFmpeg/libavcodec/jpeg2000.c

641 lines
24KB
Raw Blame History 

  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 "internal.h"

  35. #include "jpeg2000.h"

  36. 

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

  38. 

  39. /* tag tree routines */

  40. 

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

  42. int32_t ff_tag_tree_size(int w, int h)

  43. {

  44.     int64_t res = 0;

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

  46.         res += w * (int64_t)h;

  47.         av_assert0(res + 1 < INT32_MAX);

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

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

  50.     }

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

  52. }

  53. 

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

  55. {

  56.     int pw = w, ph = h;

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

  58.     int32_t tt_size;

  59. 

  60.     tt_size = ff_tag_tree_size(w, h);

  61. 

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

  63.     if (!res)

  64.         return NULL;

  65. 

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

  67.         int i, j;

  68.         pw = w;

  69.         ph = h;

  70. 

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

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

  73.         t2 = t + pw * ph;

  74. 

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

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

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

  78. 

  79.         t = t2;

  80.     }

  81.     t[0].parent = NULL;

  82.     return res;

  83. }

  84. 

  85. void ff_tag_tree_zero(Jpeg2000TgtNode *t, int w, int h)

  86. {

  87.     int i, siz = ff_tag_tree_size(w, h);

  88. 

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

  90.         t[i].val = 0;

  91.         t[i].temp_val = 0;

  92.         t[i].vis = 0;

  93.     }

  94. }

  95. 

  96. uint8_t ff_jpeg2000_sigctxno_lut[256][4];

  97. 

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

  99. {

  100.     int h, v, d;

  101. 

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

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

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

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

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

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

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

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

  110. 

  111.     if (bandno < 3) {

  112.         if (bandno == 1)

  113.             FFSWAP(int, h, v);

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

  115.         if (h == 1) {

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

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

  118.             return 5;

  119.         }

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

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

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

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

  124.     } else {

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

  126.         if (d == 2) {

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

  128.             return 6;

  129.         }

  130.         if (d == 1) {

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

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

  133.             return 3;

  134.         }

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

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

  137.     }

  138.     return 0;

  139. }

  140. 

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

  142. 

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

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

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

  146. 

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

  148. {

  149.     int vcontrib, hcontrib;

  150. 

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

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

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

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

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

  156. 

  157.     return ctxlbltab[hcontrib][vcontrib];

  158. }

  159. 

  160. void av_cold ff_jpeg2000_init_tier1_luts(void)

  161. {

  162.     int i, j;

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

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

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

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

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

  168.             ff_jpeg2000_sgnctxno_lut[i][j] =

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

  170. }

  171. 

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

  173.                                   int negative)

  174. {

  175.     x++;

  176.     y++;

  177.     t1->flags[(y) * t1->stride + x] |= JPEG2000_T1_SIG;

  178.     if (negative) {

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

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

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

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

  183.     } else {

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

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

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

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

  188.     }

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

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

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

  192.     t1->flags[(y - 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_SE;

  193. }

  194. 

  195. // static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; (unused)

  196. 

  197. static void init_band_stepsize(AVCodecContext *avctx,

  198.                                Jpeg2000Band *band,

  199.                                Jpeg2000CodingStyle *codsty,

  200.                                Jpeg2000QuantStyle *qntsty,

  201.                                int bandno, int gbandno, int reslevelno,

  202.                                int cbps)

  203. {

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

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

  206.     switch (qntsty->quantsty) {

  207.         uint8_t gain;

  208.     case JPEG2000_QSTY_NONE:

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

  210.         band->f_stepsize = 1;

  211.         break;

  212.     case JPEG2000_QSTY_SI:

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

  214. //         numbps = cbps +

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

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

  217. //                                2 + numbps - qntsty->expn[gbandno]);

  218. //         break;

  219.     case JPEG2000_QSTY_SE:

  220.         /* Exponent quantization step.

  221.          * Formula:

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

  223.          * R_b = R_I + log2 (gain_b )

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

  225.         gain            = cbps;

  226.         band->f_stepsize  = ff_exp2fi(gain - qntsty->expn[gbandno]);

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

  228.         break;

  229.     default:

  230.         band->f_stepsize = 0;

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

  232.         break;

  233.     }

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

  235.         int lband = 0;

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

  237.             case 1:

  238.             case 2:

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

  240.                 lband = 1;

  241.                 break;

  242.             case 3:

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

  244.                 break;

  245.         }

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

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

  248.         }

  249.     }

  250. 

  251.     if (band->f_stepsize > (INT_MAX >> 15)) {

  252.         band->f_stepsize = 0;

  253.         av_log(avctx, AV_LOG_ERROR, "stepsize out of range\n");

  254.     }

  255. 

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

  257. 

  258.     /* FIXME: In OpenJPEG code stepsize = stepsize * 0.5. Why?

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

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

  261.         band->f_stepsize *= 0.5;

  262. }

  263. 

  264. static int init_prec(AVCodecContext *avctx,

  265.                      Jpeg2000Band *band,

  266.                      Jpeg2000ResLevel *reslevel,

  267.                      Jpeg2000Component *comp,

  268.                      Jpeg2000CodingStyle *codsty,

  269.                      int precno, int bandno, int reslevelno,

  270.                      int log2_band_prec_width,

  271.                      int log2_band_prec_height)

  272. {

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

  274.     int nb_codeblocks, cblkno;

  275. 

  276.     prec->decoded_layers = 0;

  277. 

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

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

  280. 

  281.     /* Compute P_x0 */

  282.     prec->coord[0][0] = ((reslevel->coord[0][0] >> reslevel->log2_prec_width) + precno % reslevel->num_precincts_x) *

  283.                         (1 << log2_band_prec_width);

  284. 

  285.     /* Compute P_y0 */

  286.     prec->coord[1][0] = ((reslevel->coord[1][0] >> reslevel->log2_prec_height) + precno / reslevel->num_precincts_x) *

  287.                         (1 << log2_band_prec_height);

  288. 

  289.     /* Compute P_x1 */

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

  291.                         (1 << log2_band_prec_width);

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

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

  294. 

  295.     /* Compute P_y1 */

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

  297.                         (1 << log2_band_prec_height);

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

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

  300. 

  301.     prec->nb_codeblocks_width =

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

  303.                                 band->log2_cblk_width)

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

  305.     prec->nb_codeblocks_height =

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

  307.                                 band->log2_cblk_height)

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

  309. 

  310. 

  311.     /* Tag trees initialization */

  312.     prec->cblkincl =

  313.         ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  314.                                   prec->nb_codeblocks_height);

  315.     if (!prec->cblkincl)

  316.         return AVERROR(ENOMEM);

  317. 

  318.     prec->zerobits =

  319.         ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  320.                                   prec->nb_codeblocks_height);

  321.     if (!prec->zerobits)

  322.         return AVERROR(ENOMEM);

  323. 

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

  325.         prec->cblk = NULL;

  326.         return AVERROR(ENOMEM);

  327.     }

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

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

  330.     if (!prec->cblk)

  331.         return AVERROR(ENOMEM);

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

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

  334.         int Cx0, Cy0;

  335. 

  336.         /* Compute coordinates of codeblocks */

  337.         /* Compute Cx0*/

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

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

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

  341. 

  342.         /* Compute Cy0*/

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

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

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

  346. 

  347.         /* Compute Cx1 */

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

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

  350. 

  351.         /* Compute Cy1 */

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

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

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

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

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

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

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

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

  360.         }

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

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

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

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

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

  366.         }

  367. 

  368.         cblk->lblock    = 3;

  369.         cblk->length    = 0;

  370.         cblk->npasses   = 0;

  371.         if (av_codec_is_encoder(avctx->codec)) {

  372.             cblk->layers = av_mallocz_array(codsty->nlayers, sizeof(*cblk->layers));

  373.             if (!cblk->layers)

  374.                 return AVERROR(ENOMEM);

  375.         }

  376.     }

  377. 

  378.     return 0;

  379. }

  380. 

  381. static int init_band(AVCodecContext *avctx,

  382.                      Jpeg2000ResLevel *reslevel,

  383.                      Jpeg2000Component *comp,

  384.                      Jpeg2000CodingStyle *codsty,

  385.                      Jpeg2000QuantStyle *qntsty,

  386.                      int bandno, int gbandno, int reslevelno,

  387.                      int cbps, int dx, int dy)

  388. {

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

  390.     uint8_t log2_band_prec_width, log2_band_prec_height;

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

  392.     int precno;

  393.     int nb_precincts;

  394.     int i, j, ret;

  395. 

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

  397. 

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

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

  400.      * codeblock width and height is computed for

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

  402.     if (reslevelno == 0) {

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

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

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

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

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

  408.                                             declvl - 1);

  409.         log2_band_prec_width  = reslevel->log2_prec_width;

  410.         log2_band_prec_height = reslevel->log2_prec_height;

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

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

  413.                                        reslevel->log2_prec_width);

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

  415.                                        reslevel->log2_prec_height);

  416.     } else {

  417.         /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */

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

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

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

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

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

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

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

  425.                                             declvl);

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

  427.          * in coding/decoding function? */

  428. 

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

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

  431.                                        reslevel->log2_prec_width - 1);

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

  433.                                        reslevel->log2_prec_height - 1);

  434. 

  435.         log2_band_prec_width  = reslevel->log2_prec_width  - 1;

  436.         log2_band_prec_height = reslevel->log2_prec_height - 1;

  437.     }

  438. 

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

  440.         band->prec = NULL;

  441.         return AVERROR(ENOMEM);

  442.     }

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

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

  445.     if (!band->prec)

  446.         return AVERROR(ENOMEM);

  447. 

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

  449.         ret = init_prec(avctx, band, reslevel, comp, codsty,

  450.                         precno, bandno, reslevelno,

  451.                         log2_band_prec_width, log2_band_prec_height);

  452.         if (ret < 0)

  453.             return ret;

  454.     }

  455. 

  456.     return 0;

  457. }

  458. 

  459. int ff_jpeg2000_init_component(Jpeg2000Component *comp,

  460.                                Jpeg2000CodingStyle *codsty,

  461.                                Jpeg2000QuantStyle *qntsty,

  462.                                int cbps, int dx, int dy,

  463.                                AVCodecContext *avctx)

  464. {

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

  466.     uint32_t csize;

  467. 

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

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

  470.         return AVERROR_INVALIDDATA;

  471.     }

  472. 

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

  474.                                    codsty->nreslevels2decode - 1,

  475.                                    codsty->transform))

  476.         return ret;

  477. 

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

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

  480.         return AVERROR_INVALIDDATA;

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

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

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

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

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

  486.         return AVERROR_PATCHWELCOME;

  487.     }

  488. 

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

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

  491.         comp->i_data = NULL;

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

  493.         if (!comp->f_data)

  494.             return AVERROR(ENOMEM);

  495.     } else {

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

  497.         comp->f_data = NULL;

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

  499.         if (!comp->i_data)

  500.             return AVERROR(ENOMEM);

  501.     }

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

  503.     if (!comp->reslevel)

  504.         return AVERROR(ENOMEM);

  505.     /* LOOP on resolution levels */

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

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

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

  509. 

  510.         /* Compute borders for each resolution level.

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

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

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

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

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

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

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

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

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

  520. 

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

  522.         if (reslevelno == 0)

  523.             reslevel->nbands = 1;

  524.         else

  525.             reslevel->nbands = 3;

  526. 

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

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

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

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

  531.          * for Dcinema profiles in JPEG 2000

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

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

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

  535.             reslevel->num_precincts_x = 0;

  536.         else

  537.             reslevel->num_precincts_x =

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

  539.                                         reslevel->log2_prec_width) -

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

  541. 

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

  543.             reslevel->num_precincts_y = 0;

  544.         else

  545.             reslevel->num_precincts_y =

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

  547.                                         reslevel->log2_prec_height) -

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

  549. 

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

  551.         if (!reslevel->band)

  552.             return AVERROR(ENOMEM);

  553. 

  554.         if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y * reslevel->nbands > avctx->max_pixels / sizeof(*reslevel->band->prec))

  555.             return AVERROR(ENOMEM);

  556. 

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

  558.             ret = init_band(avctx, reslevel,

  559.                             comp, codsty, qntsty,

  560.                             bandno, gbandno, reslevelno,

  561.                             cbps, dx, dy);

  562.             if (ret < 0)

  563.                 return ret;

  564.         }

  565.     }

  566.     return 0;

  567. }

  568. 

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

  570. {

  571.     int reslevelno, bandno, cblkno, precno;

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

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

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

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

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

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

  578.                 ff_tag_tree_zero(prec->zerobits, prec->nb_codeblocks_width, prec->nb_codeblocks_height);

  579.                 ff_tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height);

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

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

  582.                     cblk->length = 0;

  583.                     cblk->lblock = 3;

  584.                 }

  585.             }

  586.         }

  587.     }

  588. }

  589. 

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

  591. {

  592.     int reslevelno, bandno, precno;

  593.     for (reslevelno = 0;

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

  595.          reslevelno++) {

  596.         Jpeg2000ResLevel *reslevel;

  597. 

  598.         if (!comp->reslevel)

  599.             continue;

  600. 

  601.         reslevel = comp->reslevel + reslevelno;

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

  603.             Jpeg2000Band *band;

  604. 

  605.             if (!reslevel->band)

  606.                 continue;

  607. 

  608.             band = reslevel->band + bandno;

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

  610.                 if (band->prec) {

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

  612.                     int nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;

  613. 

  614.                     av_freep(&prec->zerobits);

  615.                     av_freep(&prec->cblkincl);

  616.                     if (prec->cblk) {

  617.                         int cblkno;

  618.                         for (cblkno = 0; cblkno < nb_code_blocks; cblkno ++) {

  619.                             Jpeg2000Cblk *cblk = &prec->cblk[cblkno];

  620.                             av_freep(&cblk->data);

  621.                             av_freep(&cblk->passes);

  622.                             av_freep(&cblk->lengthinc);

  623.                             av_freep(&cblk->data_start);

  624.                             av_freep(&cblk->layers);

  625.                         }

  626.                         av_freep(&prec->cblk);

  627.                     }

  628.                 }

  629.             }

  630. 

  631.             av_freep(&band->prec);

  632.         }

  633.         av_freep(&reslevel->band);

  634.     }

  635. 

  636.     ff_dwt_destroy(&comp->dwt);

  637.     av_freep(&comp->reslevel);

  638.     av_freep(&comp->i_data);

  639.     av_freep(&comp->f_data);

  640. }