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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 Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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/common.h"

  29. #include "libavutil/mem.h"

  30. #include "avcodec.h"

  31. #include "jpeg2000.h"

  32. 

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

  34. 

  35. /* tag tree routines */

  36. 

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

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

  39. {

  40.     uint32_t res = 0;

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

  42.         res += w * h;

  43.         if (res + 1 >= INT32_MAX)

  44.             return -1;

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

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

  47.     }

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

  49. }

  50. 

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

  52. {

  53.     int pw = w, ph = h;

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

  55.     int32_t tt_size;

  56. 

  57.     tt_size = tag_tree_size(w, h);

  58.     if (tt_size == -1)

  59.         return NULL;

  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. uint8_t ff_jpeg2000_sigctxno_lut[256][4];

  85. 

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

  87. {

  88.     int h, v, d;

  89. 

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

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

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

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

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

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

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

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

  98.     if (bandno < 3) {

  99.         if (bandno == 1)

  100.             FFSWAP(int, h, v);

  101.         if (h == 2)

  102.             return 8;

  103.         if (h == 1) {

  104.             if (v >= 1)

  105.                 return 7;

  106.             if (d >= 1)

  107.                 return 6;

  108.             return 5;

  109.         }

  110.         if (v == 2)

  111.             return 4;

  112.         if (v == 1)

  113.             return 3;

  114.         if (d >= 2)

  115.             return 2;

  116.         if (d == 1)

  117.             return 1;

  118.         return 0;

  119.     } else {

  120.         if (d >= 3)

  121.             return 8;

  122.         if (d == 2) {

  123.             if (h + v >= 1)

  124.                 return 7;

  125.             return 6;

  126.         }

  127.         if (d == 1) {

  128.             if (h + v >= 2)

  129.                 return 5;

  130.             if (h + v == 1)

  131.                 return 4;

  132.             return 3;

  133.         }

  134.         if (h + v >= 2)

  135.             return 2;

  136.         if (h + v == 1)

  137.             return 1;

  138.         return 0;

  139.     }

  140.     return 0;

  141. }

  142. 

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

  144. 

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

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

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

  148. 

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

  150. {

  151.     int vcontrib, hcontrib;

  152. 

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

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

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

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

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

  158. 

  159.     return ctxlbltab[hcontrib][vcontrib];

  160. }

  161. 

  162. void ff_jpeg2000_init_tier1_luts(void)

  163. {

  164.     int i, j;

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

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

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

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

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

  170.             ff_jpeg2000_sgnctxno_lut[i][j] =

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

  172. }

  173. 

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

  175.                                   int negative)

  176. {

  177.     x++;

  178.     y++;

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

  180.     if (negative) {

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

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

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

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

  185.     } else {

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

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

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

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

  190.     }

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

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

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

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

  195. }

  196. 

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

  198. 

  199. int ff_jpeg2000_init_component(Jpeg2000Component *comp,

  200.                                Jpeg2000CodingStyle *codsty,

  201.                                Jpeg2000QuantStyle *qntsty,

  202.                                int cbps, int dx, int dy,

  203.                                AVCodecContext *avctx)

  204. {

  205.     uint8_t log2_band_prec_width, log2_band_prec_height;

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

  207.     uint32_t csize = 1;

  208. 

  209.     if (!codsty->nreslevels2decode) {

  210.         av_log(avctx, AV_LOG_ERROR, "nreslevels2decode uninitialized\n");

  211.         return AVERROR_INVALIDDATA;

  212.     }

  213. 

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

  215.                                    codsty->nreslevels2decode - 1,

  216.                                    codsty->transform))

  217.         return ret;

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

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

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

  221. 

  222.     comp->data = av_malloc_array(csize, sizeof(*comp->data));

  223.     if (!comp->data)

  224.         return AVERROR(ENOMEM);

  225.     comp->reslevel = av_malloc_array(codsty->nreslevels, sizeof(*comp->reslevel));

  226.     if (!comp->reslevel)

  227.         return AVERROR(ENOMEM);

  228.     /* LOOP on resolution levels */

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

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

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

  232. 

  233.         /* Compute borders for each resolution level.

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

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

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

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

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

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

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

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

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

  243. 

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

  245.         if (reslevelno == 0)

  246.             reslevel->nbands = 1;

  247.         else

  248.             reslevel->nbands = 3;

  249. 

  250.         /* Number of precincts wich span the tile for resolution level reslevelno

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

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

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

  254.          * for Dcinema profiles in JPEG 2000

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

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

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

  258.             reslevel->num_precincts_x = 0;

  259.         else

  260.             reslevel->num_precincts_x =

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

  262.                                         reslevel->log2_prec_width) -

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

  264. 

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

  266.             reslevel->num_precincts_y = 0;

  267.         else

  268.             reslevel->num_precincts_y =

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

  270.                                         reslevel->log2_prec_height) -

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

  272. 

  273.         reslevel->band = av_malloc_array(reslevel->nbands, sizeof(*reslevel->band));

  274.         if (!reslevel->band)

  275.             return AVERROR(ENOMEM);

  276. 

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

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

  279.             int cblkno, precno;

  280.             int nb_precincts;

  281. 

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

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

  284.             switch (qntsty->quantsty) {

  285.                 uint8_t gain;

  286.                 int numbps;

  287.             case JPEG2000_QSTY_NONE:

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

  289.                 numbps = cbps +

  290.                          lut_gain[codsty->transform][bandno + reslevelno > 0];

  291.                 band->stepsize = (float)SHL(2048 + qntsty->mant[gbandno],

  292.                                             2 + numbps - qntsty->expn[gbandno]);

  293.                 break;

  294.             case JPEG2000_QSTY_SI:

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

  296.                 band->stepsize = (float) (1 << 13);

  297.                 break;

  298.             case JPEG2000_QSTY_SE:

  299.                 /* Exponent quantization step.

  300.                  * Formula:

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

  302.                  * R_b = R_I + log2 (gain_b )

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

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

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

  306.                  * Further investigation needed. */

  307.                 gain            = cbps;

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

  309.                 band->stepsize *= (float)qntsty->mant[gbandno] / 2048.0 + 1.0;

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

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

  312.                 band->stepsize *= 0.5;

  313.                 break;

  314.             default:

  315.                 band->stepsize = 0;

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

  317.                 break;

  318.             }

  319.             /* BITEXACT computing case --> convert to int */

  320.             if (avctx->flags & CODEC_FLAG_BITEXACT)

  321.                 band->stepsize = (int32_t)(band->stepsize * (1 << 16));

  322. 

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

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

  325.              * codeblock width and height is computed for

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

  327.             if (reslevelno == 0) {

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

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

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

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

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

  333.                                                     declvl - 1);

  334. 

  335.                 log2_band_prec_width  = reslevel->log2_prec_width;

  336.                 log2_band_prec_height = reslevel->log2_prec_height;

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

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

  339.                                                reslevel->log2_prec_width);

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

  341.                                                reslevel->log2_prec_height);

  342.             } else {

  343.                 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */

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

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

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

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

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

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

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

  351.                                                     declvl);

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

  353.                  * in coding/decoding function? */

  354. 

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

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

  357.                                                reslevel->log2_prec_width - 1);

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

  359.                                                reslevel->log2_prec_height - 1);

  360. 

  361.                 log2_band_prec_width  = reslevel->log2_prec_width  - 1;

  362.                 log2_band_prec_height = reslevel->log2_prec_height - 1;

  363.             }

  364. 

  365.             band->prec = av_malloc_array(reslevel->num_precincts_x *

  366.                                          reslevel->num_precincts_y,

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

  368.             if (!band->prec)

  369.                 return AVERROR(ENOMEM);

  370. 

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

  372. 

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

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

  375. 

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

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

  378. 

  379.                 /* Compute P_x0 */

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

  381.                                     (1 << log2_band_prec_width);

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

  383. 

  384.                 /* Compute P_y0 */

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

  386.                                     (1 << log2_band_prec_height);

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

  388. 

  389.                 /* Compute P_x1 */

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

  391.                                     (1 << log2_band_prec_width);

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

  393. 

  394.                 /* Compute P_y1 */

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

  396.                                     (1 << log2_band_prec_height);

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

  398. 

  399.                 prec->nb_codeblocks_width =

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

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

  402.                                             band->log2_cblk_width);

  403.                 prec->nb_codeblocks_height =

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

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

  406.                                             band->log2_cblk_height);

  407. 

  408.                 /* Tag trees initialization */

  409.                 prec->cblkincl =

  410.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  411.                                               prec->nb_codeblocks_height);

  412.                 if (!prec->cblkincl)

  413.                     return AVERROR(ENOMEM);

  414. 

  415.                 prec->zerobits =

  416.                     ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,

  417.                                               prec->nb_codeblocks_height);

  418.                 if (!prec->zerobits)

  419.                     return AVERROR(ENOMEM);

  420. 

  421.                 prec->cblk = av_malloc_array(prec->nb_codeblocks_width *

  422.                                              prec->nb_codeblocks_height,

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

  424.                 if (!prec->cblk)

  425.                     return AVERROR(ENOMEM);

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

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

  428.                     uint16_t Cx0, Cy0;

  429. 

  430.                     /* Compute coordinates of codeblocks */

  431.                     /* Compute Cx0*/

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

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

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

  435. 

  436.                     /* Compute Cy0*/

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

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

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

  440. 

  441.                     /* Compute Cx1 */

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

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

  444. 

  445.                     /* Compute Cy1 */

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

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

  448.                     cblk->zero      = 0;

  449.                     cblk->lblock    = 3;

  450.                     cblk->length    = 0;

  451.                     cblk->lengthinc = 0;

  452.                     cblk->npasses   = 0;

  453.                 }

  454.             }

  455.         }

  456.     }

  457.     return 0;

  458. }

  459. 

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

  461. {

  462.     int reslevelno, bandno, precno;

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

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

  465. 

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

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

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

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

  470.                 av_freep(&prec->zerobits);

  471.                 av_freep(&prec->cblkincl);

  472.                 av_freep(&prec->cblk);

  473.             }

  474. 

  475.             av_freep(&band->prec);

  476.         }

  477.         av_freep(&reslevel->band);

  478.     }

  479. 

  480.     ff_dwt_destroy(&comp->dwt);

  481.     av_freep(&comp->reslevel);

  482.     av_freep(&comp->data);

  483. }