libavcodec/jpeg2000.c

   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 "libavutil/thread.h"
  34 #include "avcodec.h"
  35 #include "jpeg2000.h"
  36
  37 #define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n))
  38
  39 /* tag tree routines */
  40
  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 /* allocate the memory for tag tree */
  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 = tag_tree_size(w, h);
  61
  62     t = res = av_calloc(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, int val)
  86 {
  87     int i, siz = tag_tree_size(w, h);
  88
  89     for (i = 0; i < siz; i++) {
  90         t[i].val = val;
  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 static void av_cold 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 av_cold ff_jpeg2000_init_tier1_luts(void)
 173 {
 174     static AVOnce init_static_once = AV_ONCE_INIT;
 175     ff_thread_once(&init_static_once, jpeg2000_init_tier1_luts);
 176 }
 177
 178 void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,
 179                                   int negative)
 180 {
 181     x++;
 182     y++;
 183     t1->flags[(y) * t1->stride + x] |= JPEG2000_T1_SIG;
 184     if (negative) {
 185         t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
 186         t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
 187         t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
 188         t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
 189     } else {
 190         t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W;
 191         t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E;
 192         t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N;
 193         t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S;
 194     }
 195     t1->flags[(y + 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_NW;
 196     t1->flags[(y + 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_NE;
 197     t1->flags[(y - 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_SW;
 198     t1->flags[(y - 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_SE;
 199 }
 200
 201 // static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; (unused)
 202
 203 /**
 204  * 2^(x) for integer x in the range -126..128.
 205  * @return correctly rounded float
 206  */
 207 static av_always_inline float exp2fi(int x)
 208 {
 209     av_assert2(-126 <= x && x <= 128);
 210     /* Normal range */
 211     return av_int2float((x+127) << 23);
 212 }
 213
 214 static void init_band_stepsize(AVCodecContext *avctx,
 215                                Jpeg2000Band *band,
 216                                Jpeg2000CodingStyle *codsty,
 217                                Jpeg2000QuantStyle *qntsty,
 218                                int bandno, int gbandno, int reslevelno,
 219                                int cbps)
 220 {
 221     /* TODO: Implementation of quantization step not finished,
 222      * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */
 223     switch (qntsty->quantsty) {
 224         uint8_t gain;
 225     case JPEG2000_QSTY_NONE:
 226         /* TODO: to verify. No quantization in this case */
 227         band->f_stepsize = 1;
 228         break;
 229     case JPEG2000_QSTY_SI:
 230         /*TODO: Compute formula to implement. */
 231 //         numbps = cbps +
 232 //                  lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];
 233 //         band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],
 234 //                                2 + numbps - qntsty->expn[gbandno]);
 235 //         break;
 236     case JPEG2000_QSTY_SE:
 237         /* Exponent quantization step.
 238          * Formula:
 239          * delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11))
 240          * R_b = R_I + log2 (gain_b )
 241          * see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */
 242         gain            = cbps;
 243         band->f_stepsize  = exp2fi(gain - qntsty->expn[gbandno]);
 244         band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0;
 245         break;
 246     default:
 247         band->f_stepsize = 0;
 248         av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");
 249         break;
 250     }
 251     if (codsty->transform != FF_DWT53) {
 252         int lband = 0;
 253         switch (bandno + (reslevelno > 0)) {
 254             case 1:
 255             case 2:
 256                 band->f_stepsize *= F_LFTG_X * 2;
 257                 lband = 1;
 258                 break;
 259             case 3:
 260                 band->f_stepsize *= F_LFTG_X * F_LFTG_X * 4;
 261                 break;
 262         }
 263         band->f_stepsize *= pow(F_LFTG_K, 2*(codsty->nreslevels2decode - reslevelno) + lband - 2);
 264     }
 265
 266     if (band->f_stepsize > (INT_MAX >> 15)) {
 267         band->f_stepsize = 0;
 268         av_log(avctx, AV_LOG_ERROR, "stepsize out of range\n");
 269     }
 270
 271     band->i_stepsize = (int)floorf(band->f_stepsize * (1 << 15));
 272 }
 273
 274 static int init_prec(AVCodecContext *avctx,
 275                      Jpeg2000Band *band,
 276                      Jpeg2000ResLevel *reslevel,
 277                      Jpeg2000Component *comp,
 278                      Jpeg2000CodingStyle *codsty,
 279                      int precno, int bandno, int reslevelno,
 280                      int log2_band_prec_width,
 281                      int log2_band_prec_height)
 282 {
 283     Jpeg2000Prec *prec = band->prec + precno;
 284     int nb_codeblocks, cblkno;
 285
 286     prec->decoded_layers = 0;
 287
 288     /* TODO: Explain formula for JPEG200 DCINEMA. */
 289     /* TODO: Verify with previous count of codeblocks per band */
 290
 291     /* Compute P_x0 */
 292     prec->coord[0][0] = ((reslevel->coord[0][0] >> reslevel->log2_prec_width) + precno % reslevel->num_precincts_x) *
 293                         (1 << log2_band_prec_width);
 294
 295     /* Compute P_y0 */
 296     prec->coord[1][0] = ((reslevel->coord[1][0] >> reslevel->log2_prec_height) + precno / reslevel->num_precincts_x) *
 297                         (1 << log2_band_prec_height);
 298
 299     /* Compute P_x1 */
 300     prec->coord[0][1] = prec->coord[0][0] +
 301                         (1 << log2_band_prec_width);
 302     prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
 303     prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
 304
 305     /* Compute P_y1 */
 306     prec->coord[1][1] = prec->coord[1][0] +
 307                         (1 << log2_band_prec_height);
 308     prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
 309     prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
 310
 311     prec->nb_codeblocks_width =
 312         ff_jpeg2000_ceildivpow2(prec->coord[0][1],
 313                                 band->log2_cblk_width)
 314         - (prec->coord[0][0] >> band->log2_cblk_width);
 315     prec->nb_codeblocks_height =
 316         ff_jpeg2000_ceildivpow2(prec->coord[1][1],
 317                                 band->log2_cblk_height)
 318         - (prec->coord[1][0] >> band->log2_cblk_height);
 319
 320
 321     /* Tag trees initialization */
 322     prec->cblkincl =
 323         ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
 324                                   prec->nb_codeblocks_height);
 325     if (!prec->cblkincl)
 326         return AVERROR(ENOMEM);
 327
 328     prec->zerobits =
 329         ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
 330                                   prec->nb_codeblocks_height);
 331     if (!prec->zerobits)
 332         return AVERROR(ENOMEM);
 333
 334     if (prec->nb_codeblocks_width * (uint64_t)prec->nb_codeblocks_height > INT_MAX) {
 335         prec->cblk = NULL;
 336         return AVERROR(ENOMEM);
 337     }
 338     nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height;
 339     prec->cblk = av_calloc(nb_codeblocks, sizeof(*prec->cblk));
 340     if (!prec->cblk)
 341         return AVERROR(ENOMEM);
 342     for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) {
 343         Jpeg2000Cblk *cblk = prec->cblk + cblkno;
 344         int Cx0, Cy0;
 345
 346         /* Compute coordinates of codeblocks */
 347         /* Compute Cx0*/
 348         Cx0 = ((prec->coord[0][0]) >> band->log2_cblk_width) << band->log2_cblk_width;
 349         Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width)  << band->log2_cblk_width);
 350         cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
 351
 352         /* Compute Cy0*/
 353         Cy0 = ((prec->coord[1][0]) >> band->log2_cblk_height) << band->log2_cblk_height;
 354         Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width)   << band->log2_cblk_height);
 355         cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
 356
 357         /* Compute Cx1 */
 358         cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
 359                                   prec->coord[0][1]);
 360
 361         /* Compute Cy1 */
 362         cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
 363                                   prec->coord[1][1]);
 364         /* Update code-blocks coordinates according sub-band position */
 365         if ((bandno + !!reslevelno) & 1) {
 366             cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -
 367                                  comp->reslevel[reslevelno-1].coord[0][0];
 368             cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -
 369                                  comp->reslevel[reslevelno-1].coord[0][0];
 370         }
 371         if ((bandno + !!reslevelno) & 2) {
 372             cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -
 373                                  comp->reslevel[reslevelno-1].coord[1][0];
 374             cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -
 375                                  comp->reslevel[reslevelno-1].coord[1][0];
 376         }
 377
 378         cblk->lblock    = 3;
 379         cblk->length    = 0;
 380         cblk->npasses   = 0;
 381         if (av_codec_is_encoder(avctx->codec)) {
 382             cblk->layers = av_calloc(codsty->nlayers, sizeof(*cblk->layers));
 383             if (!cblk->layers)
 384                 return AVERROR(ENOMEM);
 385         }
 386     }
 387
 388     return 0;
 389 }
 390
 391 static int init_band(AVCodecContext *avctx,
 392                      Jpeg2000ResLevel *reslevel,
 393                      Jpeg2000Component *comp,
 394                      Jpeg2000CodingStyle *codsty,
 395                      Jpeg2000QuantStyle *qntsty,
 396                      int bandno, int gbandno, int reslevelno,
 397                      const int cbps, int dx, int dy)
 398 {
 399     Jpeg2000Band *band = reslevel->band + bandno;
 400     uint8_t log2_band_prec_width, log2_band_prec_height;
 401     int declvl = codsty->nreslevels - reslevelno;    // N_L -r see  ISO/IEC 15444-1:2002 B.5
 402     int precno;
 403     int nb_precincts;
 404     int i, j, ret;
 405
 406     init_band_stepsize(avctx, band, codsty, qntsty, bandno, gbandno, reslevelno, cbps);
 407
 408     /* computation of tbx_0, tbx_1, tby_0, tby_1
 409      * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1
 410      * codeblock width and height is computed for
 411      * DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */
 412     if (reslevelno == 0) {
 413         /* for reslevelno = 0, only one band, x0_b = y0_b = 0 */
 414         for (i = 0; i < 2; i++)
 415             for (j = 0; j < 2; j++)
 416                 band->coord[i][j] =
 417                     ff_jpeg2000_ceildivpow2(comp->coord_o[i][j],
 418                                             declvl - 1);
 419         log2_band_prec_width  = reslevel->log2_prec_width;
 420         log2_band_prec_height = reslevel->log2_prec_height;
 421         /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
 422         band->log2_cblk_width  = FFMIN(codsty->log2_cblk_width,
 423                                        reslevel->log2_prec_width);
 424         band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
 425                                        reslevel->log2_prec_height);
 426     } else {
 427         /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */
 428         /* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */
 429         for (i = 0; i < 2; i++)
 430             for (j = 0; j < 2; j++)
 431                 /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
 432                 band->coord[i][j] =
 433                     ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] -
 434                                             (((bandno + 1 >> i) & 1LL) << declvl - 1),
 435                                             declvl);
 436         /* TODO: Manage case of 3 band offsets here or
 437          * in coding/decoding function? */
 438
 439         /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
 440         band->log2_cblk_width  = FFMIN(codsty->log2_cblk_width,
 441                                        reslevel->log2_prec_width - 1);
 442         band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
 443                                        reslevel->log2_prec_height - 1);
 444
 445         log2_band_prec_width  = reslevel->log2_prec_width  - 1;
 446         log2_band_prec_height = reslevel->log2_prec_height - 1;
 447     }
 448
 449     if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y > INT_MAX) {
 450         band->prec = NULL;
 451         return AVERROR(ENOMEM);
 452     }
 453     nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
 454     band->prec = av_calloc(nb_precincts, sizeof(*band->prec));
 455     if (!band->prec)
 456         return AVERROR(ENOMEM);
 457
 458     for (precno = 0; precno < nb_precincts; precno++) {
 459         ret = init_prec(avctx, band, reslevel, comp, codsty,
 460                         precno, bandno, reslevelno,
 461                         log2_band_prec_width, log2_band_prec_height);
 462         if (ret < 0)
 463             return ret;
 464     }
 465
 466     return 0;
 467 }
 468
 469 int ff_jpeg2000_init_component(Jpeg2000Component *comp,
 470                                Jpeg2000CodingStyle *codsty,
 471                                Jpeg2000QuantStyle *qntsty,
 472                                const int cbps, int dx, int dy,
 473                                AVCodecContext *avctx)
 474 {
 475     int reslevelno, bandno, gbandno = 0, ret, i, j;
 476     uint32_t csize;
 477
 478     if (codsty->nreslevels2decode <= 0) {
 479         av_log(avctx, AV_LOG_ERROR, "nreslevels2decode %d invalid or uninitialized\n", codsty->nreslevels2decode);
 480         return AVERROR_INVALIDDATA;
 481     }
 482
 483     if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
 484                                    codsty->nreslevels2decode - 1,
 485                                    codsty->transform))
 486         return ret;
 487
 488     if (av_image_check_size(comp->coord[0][1] - comp->coord[0][0],
 489                             comp->coord[1][1] - comp->coord[1][0], 0, avctx))
 490         return AVERROR_INVALIDDATA;
 491     csize = (comp->coord[0][1] - comp->coord[0][0]) *
 492             (comp->coord[1][1] - comp->coord[1][0]);
 493     if (comp->coord[0][1] - comp->coord[0][0] > 32768 ||
 494         comp->coord[1][1] - comp->coord[1][0] > 32768) {
 495         av_log(avctx, AV_LOG_ERROR, "component size too large\n");
 496         return AVERROR_PATCHWELCOME;
 497     }
 498
 499     if (codsty->transform == FF_DWT97) {
 500         csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->f_data);
 501         comp->i_data = NULL;
 502         comp->f_data = av_calloc(csize, sizeof(*comp->f_data));
 503         if (!comp->f_data)
 504             return AVERROR(ENOMEM);
 505     } else {
 506         csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->i_data);
 507         comp->f_data = NULL;
 508         comp->i_data = av_calloc(csize, sizeof(*comp->i_data));
 509         if (!comp->i_data)
 510             return AVERROR(ENOMEM);
 511     }
 512     comp->reslevel = av_calloc(codsty->nreslevels, sizeof(*comp->reslevel));
 513     if (!comp->reslevel)
 514         return AVERROR(ENOMEM);
 515     /* LOOP on resolution levels */
 516     for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
 517         int declvl = codsty->nreslevels - reslevelno;    // N_L -r see  ISO/IEC 15444-1:2002 B.5
 518         Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
 519
 520         /* Compute borders for each resolution level.
 521          * Computation of trx_0, trx_1, try_0 and try_1.
 522          * see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
 523         for (i = 0; i < 2; i++)
 524             for (j = 0; j < 2; j++)
 525                 reslevel->coord[i][j] =
 526                     ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);
 527         // update precincts size: 2^n value
 528         reslevel->log2_prec_width  = codsty->log2_prec_widths[reslevelno];
 529         reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
 530
 531         /* Number of bands for each resolution level */
 532         if (reslevelno == 0)
 533             reslevel->nbands = 1;
 534         else
 535             reslevel->nbands = 3;
 536
 537         /* Number of precincts which span the tile for resolution level reslevelno
 538          * see B.6 in ISO/IEC 15444-1:2002 eq. B-16
 539          * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
 540          * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
 541          * for Dcinema profiles in JPEG 2000
 542          * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
 543          * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
 544         if (reslevel->coord[0][1] == reslevel->coord[0][0])
 545             reslevel->num_precincts_x = 0;
 546         else
 547             reslevel->num_precincts_x =
 548                 ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
 549                                         reslevel->log2_prec_width) -
 550                 (reslevel->coord[0][0] >> reslevel->log2_prec_width);
 551
 552         if (reslevel->coord[1][1] == reslevel->coord[1][0])
 553             reslevel->num_precincts_y = 0;
 554         else
 555             reslevel->num_precincts_y =
 556                 ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
 557                                         reslevel->log2_prec_height) -
 558                 (reslevel->coord[1][0] >> reslevel->log2_prec_height);
 559
 560         reslevel->band = av_calloc(reslevel->nbands, sizeof(*reslevel->band));
 561         if (!reslevel->band)
 562             return AVERROR(ENOMEM);
 563
 564         if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y * reslevel->nbands > avctx->max_pixels / sizeof(*reslevel->band->prec))
 565             return AVERROR(ENOMEM);
 566
 567         for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
 568             ret = init_band(avctx, reslevel,
 569                             comp, codsty, qntsty,
 570                             bandno, gbandno, reslevelno,
 571                             cbps, dx, dy);
 572             if (ret < 0)
 573                 return ret;
 574         }
 575     }
 576     return 0;
 577 }
 578
 579 void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
 580 {
 581     int reslevelno, bandno, cblkno, precno;
 582     for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
 583         Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
 584         for (bandno = 0; bandno < rlevel->nbands; bandno++) {
 585             Jpeg2000Band *band = rlevel->band + bandno;
 586             for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) {
 587                 Jpeg2000Prec *prec = band->prec + precno;
 588                 ff_tag_tree_zero(prec->zerobits, prec->nb_codeblocks_width, prec->nb_codeblocks_height, 0);
 589                 ff_tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height, 0);
 590                 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
 591                     Jpeg2000Cblk *cblk = prec->cblk + cblkno;
 592                     cblk->length = 0;
 593                     cblk->lblock = 3;
 594                 }
 595             }
 596         }
 597     }
 598 }
 599
 600 void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
 601 {
 602     int reslevelno, bandno, precno;
 603     for (reslevelno = 0;
 604          comp->reslevel && reslevelno < codsty->nreslevels;
 605          reslevelno++) {
 606         Jpeg2000ResLevel *reslevel;
 607
 608         if (!comp->reslevel)
 609             continue;
 610
 611         reslevel = comp->reslevel + reslevelno;
 612         for (bandno = 0; bandno < reslevel->nbands; bandno++) {
 613             Jpeg2000Band *band;
 614
 615             if (!reslevel->band)
 616                 continue;
 617
 618             band = reslevel->band + bandno;
 619             for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
 620                 if (band->prec) {
 621                     Jpeg2000Prec *prec = band->prec + precno;
 622                     int nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
 623
 624                     av_freep(&prec->zerobits);
 625                     av_freep(&prec->cblkincl);
 626                     if (prec->cblk) {
 627                         int cblkno;
 628                         for (cblkno = 0; cblkno < nb_code_blocks; cblkno ++) {
 629                             Jpeg2000Cblk *cblk = &prec->cblk[cblkno];
 630                             av_freep(&cblk->data);
 631                             av_freep(&cblk->passes);
 632                             av_freep(&cblk->lengthinc);
 633                             av_freep(&cblk->data_start);
 634                             av_freep(&cblk->layers);
 635                         }
 636                         av_freep(&prec->cblk);
 637                     }
 638                 }
 639             }
 640
 641             av_freep(&band->prec);
 642         }
 643         av_freep(&reslevel->band);
 644     }
 645
 646     ff_dwt_destroy(&comp->dwt);
 647     av_freep(&comp->reslevel);
 648     av_freep(&comp->i_data);
 649     av_freep(&comp->f_data);
 650 }