summaryrefslogtreecommitdiff
path: root/libavcodec/jpeg2000.c
blob: 09654e82f6e0ad6333fb1454ddd2c37f02fa69f9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
/*
 * JPEG 2000 encoder and decoder common functions
 * Copyright (c) 2007 Kamil Nowosad
 * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * JPEG 2000 image encoder and decoder common functions
 */

#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "jpeg2000.h"

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

/* tag tree routines */

/* allocate the memory for tag tree */
static int32_t tag_tree_size(uint16_t w, uint16_t h)
{
    uint32_t res = 0;
    while (w > 1 || h > 1) {
        res += w * h;
        av_assert0(res + 1 < INT32_MAX);
        w = (w + 1) >> 1;
        h = (h + 1) >> 1;
    }
    return (int32_t)(res + 1);
}

static Jpeg2000TgtNode *ff_jpeg2000_tag_tree_init(int w, int h)
{
    int pw = w, ph = h;
    Jpeg2000TgtNode *res, *t, *t2;
    int32_t tt_size;

    tt_size = tag_tree_size(w, h);

    t = res = av_mallocz_array(tt_size, sizeof(*t));
    if (!res)
        return NULL;

    while (w > 1 || h > 1) {
        int i, j;
        pw = w;
        ph = h;

        w  = (w + 1) >> 1;
        h  = (h + 1) >> 1;
        t2 = t + pw * ph;

        for (i = 0; i < ph; i++)
            for (j = 0; j < pw; j++)
                t[i * pw + j].parent = &t2[(i >> 1) * w + (j >> 1)];

        t = t2;
    }
    t[0].parent = NULL;
    return res;
}

static void tag_tree_zero(Jpeg2000TgtNode *t, int w, int h)
{
    int i, siz = tag_tree_size(w, h);

    for (i = 0; i < siz; i++) {
        t[i].val = 0;
        t[i].vis = 0;
    }
}

uint8_t ff_jpeg2000_sigctxno_lut[256][4];

static int getsigctxno(int flag, int bandno)
{
    int h, v, d;

    h = ((flag & JPEG2000_T1_SIG_E)  ? 1 : 0) +
        ((flag & JPEG2000_T1_SIG_W)  ? 1 : 0);
    v = ((flag & JPEG2000_T1_SIG_N)  ? 1 : 0) +
        ((flag & JPEG2000_T1_SIG_S)  ? 1 : 0);
    d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) +
        ((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) +
        ((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) +
        ((flag & JPEG2000_T1_SIG_SW) ? 1 : 0);

    if (bandno < 3) {
        if (bandno == 1)
            FFSWAP(int, h, v);
        if (h == 2) return 8;
        if (h == 1) {
            if (v >= 1) return 7;
            if (d >= 1) return 6;
            return 5;
        }
        if (v == 2) return 4;
        if (v == 1) return 3;
        if (d >= 2) return 2;
        if (d == 1) return 1;
    } else {
        if (d >= 3) return 8;
        if (d == 2) {
            if (h+v >= 1) return 7;
            return 6;
        }
        if (d == 1) {
            if (h+v >= 2) return 5;
            if (h+v == 1) return 4;
            return 3;
        }
        if (h+v >= 2) return 2;
        if (h+v == 1) return 1;
    }
    return 0;
}

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

static const int contribtab[3][3] = { {  0, -1,  1 }, { -1, -1,  0 }, {  1,  0,  1 } };
static const int  ctxlbltab[3][3] = { { 13, 12, 11 }, { 10,  9, 10 }, { 11, 12, 13 } };
static const int  xorbittab[3][3] = { {  1,  1,  1 }, {  1,  0,  0 }, {  0,  0,  0 } };

static int getsgnctxno(int flag, uint8_t *xorbit)
{
    int vcontrib, hcontrib;

    hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1 : 2 : 0]
                         [flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1 : 2 : 0] + 1;
    vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1 : 2 : 0]
                         [flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1 : 2 : 0] + 1;
    *xorbit = xorbittab[hcontrib][vcontrib];

    return ctxlbltab[hcontrib][vcontrib];
}

void av_cold ff_jpeg2000_init_tier1_luts(void)
{
    int i, j;
    for (i = 0; i < 256; i++)
        for (j = 0; j < 4; j++)
            ff_jpeg2000_sigctxno_lut[i][j] = getsigctxno(i, j);
    for (i = 0; i < 16; i++)
        for (j = 0; j < 16; j++)
            ff_jpeg2000_sgnctxno_lut[i][j] =
                getsgnctxno(i + (j << 8), &ff_jpeg2000_xorbit_lut[i][j]);
}

void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,
                                  int negative)
{
    x++;
    y++;
    t1->flags[(y) * t1->stride + x] |= JPEG2000_T1_SIG;
    if (negative) {
        t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
        t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
        t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
        t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
    } else {
        t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W;
        t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E;
        t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N;
        t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S;
    }
    t1->flags[(y + 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_NW;
    t1->flags[(y + 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_NE;
    t1->flags[(y - 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_SW;
    t1->flags[(y - 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_SE;
}

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

int ff_jpeg2000_init_component(Jpeg2000Component *comp,
                               Jpeg2000CodingStyle *codsty,
                               Jpeg2000QuantStyle *qntsty,
                               int cbps, int dx, int dy,
                               AVCodecContext *avctx)
{
    uint8_t log2_band_prec_width, log2_band_prec_height;
    int reslevelno, bandno, gbandno = 0, ret, i, j;
    uint32_t csize;

    if (codsty->nreslevels2decode <= 0) {
        av_log(avctx, AV_LOG_ERROR, "nreslevels2decode %d invalid or uninitialized\n", codsty->nreslevels2decode);
        return AVERROR_INVALIDDATA;
    }

    if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
                                   codsty->nreslevels2decode - 1,
                                   codsty->transform))
        return ret;
    // component size comp->coord is uint16_t so ir cannot overflow
    csize = (comp->coord[0][1] - comp->coord[0][0]) *
            (comp->coord[1][1] - comp->coord[1][0]);

    if (codsty->transform == FF_DWT97) {
        csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->f_data);
        comp->i_data = NULL;
        comp->f_data = av_mallocz_array(csize, sizeof(*comp->f_data));
        if (!comp->f_data)
            return AVERROR(ENOMEM);
    } else {
        csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->i_data);
        comp->f_data = NULL;
        comp->i_data = av_mallocz_array(csize, sizeof(*comp->i_data));
        if (!comp->i_data)
            return AVERROR(ENOMEM);
    }
    comp->reslevel = av_mallocz_array(codsty->nreslevels, sizeof(*comp->reslevel));
    if (!comp->reslevel)
        return AVERROR(ENOMEM);
    /* LOOP on resolution levels */
    for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
        int declvl = codsty->nreslevels - reslevelno;    // N_L -r see  ISO/IEC 15444-1:2002 B.5
        Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;

        /* Compute borders for each resolution level.
         * Computation of trx_0, trx_1, try_0 and try_1.
         * see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
        for (i = 0; i < 2; i++)
            for (j = 0; j < 2; j++)
                reslevel->coord[i][j] =
                    ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);
        // update precincts size: 2^n value
        reslevel->log2_prec_width  = codsty->log2_prec_widths[reslevelno];
        reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];

        /* Number of bands for each resolution level */
        if (reslevelno == 0)
            reslevel->nbands = 1;
        else
            reslevel->nbands = 3;

        /* Number of precincts which span the tile for resolution level reslevelno
         * see B.6 in ISO/IEC 15444-1:2002 eq. B-16
         * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
         * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
         * for Dcinema profiles in JPEG 2000
         * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
         * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
        if (reslevel->coord[0][1] == reslevel->coord[0][0])
            reslevel->num_precincts_x = 0;
        else
            reslevel->num_precincts_x =
                ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
                                        reslevel->log2_prec_width) -
                (reslevel->coord[0][0] >> reslevel->log2_prec_width);

        if (reslevel->coord[1][1] == reslevel->coord[1][0])
            reslevel->num_precincts_y = 0;
        else
            reslevel->num_precincts_y =
                ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
                                        reslevel->log2_prec_height) -
                (reslevel->coord[1][0] >> reslevel->log2_prec_height);

        reslevel->band = av_mallocz_array(reslevel->nbands, sizeof(*reslevel->band));
        if (!reslevel->band)
            return AVERROR(ENOMEM);

        for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
            Jpeg2000Band *band = reslevel->band + bandno;
            int cblkno, precno;
            int nb_precincts;

            /* TODO: Implementation of quantization step not finished,
             * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */
            switch (qntsty->quantsty) {
                uint8_t gain;
            case JPEG2000_QSTY_NONE:
                /* TODO: to verify. No quantization in this case */
                band->f_stepsize = 1;
                break;
            case JPEG2000_QSTY_SI:
                /*TODO: Compute formula to implement. */
//                 numbps = cbps +
//                          lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];
//                 band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],
//                                        2 + numbps - qntsty->expn[gbandno]);
//                 break;
            case JPEG2000_QSTY_SE:
                /* Exponent quantization step.
                 * Formula:
                 * delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11))
                 * R_b = R_I + log2 (gain_b )
                 * see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */
                gain            = cbps;
                band->f_stepsize  = pow(2.0, gain - qntsty->expn[gbandno]);
                band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0;
                break;
            default:
                band->f_stepsize = 0;
                av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");
                break;
            }
            if (codsty->transform != FF_DWT53) {
                int lband = 0;
                switch (bandno + (reslevelno > 0)) {
                    case 1:
                    case 2:
                        band->f_stepsize *= F_LFTG_X * 2;
                        lband = 1;
                        break;
                    case 3:
                        band->f_stepsize *= F_LFTG_X * F_LFTG_X * 4;
                        break;
                }
                if (codsty->transform == FF_DWT97) {
                    band->f_stepsize *= pow(F_LFTG_K, 2*(codsty->nreslevels2decode - reslevelno) + lband - 2);
                }
            }

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

            /* FIXME: In openjepg code stespize = stepsize * 0.5. Why?
             * If not set output of entropic decoder is not correct. */
            if (!av_codec_is_encoder(avctx->codec))
                band->f_stepsize *= 0.5;

            /* computation of tbx_0, tbx_1, tby_0, tby_1
             * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1
             * codeblock width and height is computed for
             * DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */
            if (reslevelno == 0) {
                /* for reslevelno = 0, only one band, x0_b = y0_b = 0 */
                for (i = 0; i < 2; i++)
                    for (j = 0; j < 2; j++)
                        band->coord[i][j] =
                            ff_jpeg2000_ceildivpow2(comp->coord_o[i][j],
                                                    declvl - 1);
                log2_band_prec_width  = reslevel->log2_prec_width;
                log2_band_prec_height = reslevel->log2_prec_height;
                /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
                band->log2_cblk_width  = FFMIN(codsty->log2_cblk_width,
                                               reslevel->log2_prec_width);
                band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
                                               reslevel->log2_prec_height);
            } else {
                /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */
                /* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */
                for (i = 0; i < 2; i++)
                    for (j = 0; j < 2; j++)
                        /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
                        band->coord[i][j] =
                            ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] -
                                                    (((bandno + 1 >> i) & 1LL) << declvl - 1),
                                                    declvl);
                /* TODO: Manage case of 3 band offsets here or
                 * in coding/decoding function? */

                /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
                band->log2_cblk_width  = FFMIN(codsty->log2_cblk_width,
                                               reslevel->log2_prec_width - 1);
                band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
                                               reslevel->log2_prec_height - 1);

                log2_band_prec_width  = reslevel->log2_prec_width  - 1;
                log2_band_prec_height = reslevel->log2_prec_height - 1;
            }

            if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y > INT_MAX) {
                band->prec = NULL;
                return AVERROR(ENOMEM);
            }
            nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
            band->prec = av_mallocz_array(nb_precincts, sizeof(*band->prec));
            if (!band->prec)
                return AVERROR(ENOMEM);

            for (precno = 0; precno < nb_precincts; precno++) {
                Jpeg2000Prec *prec = band->prec + precno;
                int nb_codeblocks;

                prec->decoded_layers = 0;

                /* TODO: Explain formula for JPEG200 DCINEMA. */
                /* TODO: Verify with previous count of codeblocks per band */

                /* Compute P_x0 */
                prec->coord[0][0] = ((band->coord[0][0] >> log2_band_prec_width) + precno % reslevel->num_precincts_x) *
                                    (1 << log2_band_prec_width);

                /* Compute P_y0 */
                prec->coord[1][0] = ((band->coord[1][0] >> log2_band_prec_height) + precno / reslevel->num_precincts_x) *
                                    (1 << log2_band_prec_height);

                /* Compute P_x1 */
                prec->coord[0][1] = prec->coord[0][0] +
                                    (1 << log2_band_prec_width);
                prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
                prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);

                /* Compute P_y1 */
                prec->coord[1][1] = prec->coord[1][0] +
                                    (1 << log2_band_prec_height);
                prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
                prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);

                prec->nb_codeblocks_width =
                    ff_jpeg2000_ceildivpow2(prec->coord[0][1],
                                            band->log2_cblk_width)
                    - (prec->coord[0][0] >> band->log2_cblk_width);
                prec->nb_codeblocks_height =
                    ff_jpeg2000_ceildivpow2(prec->coord[1][1],
                                            band->log2_cblk_height)
                    - (prec->coord[1][0] >> band->log2_cblk_height);


                /* Tag trees initialization */
                prec->cblkincl =
                    ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
                                              prec->nb_codeblocks_height);
                if (!prec->cblkincl)
                    return AVERROR(ENOMEM);

                prec->zerobits =
                    ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
                                              prec->nb_codeblocks_height);
                if (!prec->zerobits)
                    return AVERROR(ENOMEM);

                if (prec->nb_codeblocks_width * (uint64_t)prec->nb_codeblocks_height > INT_MAX) {
                    prec->cblk = NULL;
                    return AVERROR(ENOMEM);
                }
                nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height;
                prec->cblk = av_mallocz_array(nb_codeblocks, sizeof(*prec->cblk));
                if (!prec->cblk)
                    return AVERROR(ENOMEM);
                for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) {
                    Jpeg2000Cblk *cblk = prec->cblk + cblkno;
                    uint16_t Cx0, Cy0;

                    /* Compute coordinates of codeblocks */
                    /* Compute Cx0*/
                    Cx0 = ((prec->coord[0][0]) >> band->log2_cblk_width) << band->log2_cblk_width;
                    Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width)  << band->log2_cblk_width);
                    cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);

                    /* Compute Cy0*/
                    Cy0 = ((prec->coord[1][0]) >> band->log2_cblk_height) << band->log2_cblk_height;
                    Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width)   << band->log2_cblk_height);
                    cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);

                    /* Compute Cx1 */
                    cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
                                              prec->coord[0][1]);

                    /* Compute Cy1 */
                    cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
                                              prec->coord[1][1]);
                    /* Update code-blocks coordinates according sub-band position */
                    if ((bandno + !!reslevelno) & 1) {
                        cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -
                                             comp->reslevel[reslevelno-1].coord[0][0];
                        cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -
                                             comp->reslevel[reslevelno-1].coord[0][0];
                    }
                    if ((bandno + !!reslevelno) & 2) {
                        cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -
                                             comp->reslevel[reslevelno-1].coord[1][0];
                        cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -
                                             comp->reslevel[reslevelno-1].coord[1][0];
                    }

                    cblk->zero      = 0;
                    cblk->lblock    = 3;
                    cblk->length    = 0;
                    memset(cblk->lengthinc, 0, sizeof(cblk->lengthinc));
                    cblk->npasses   = 0;
                }
            }
        }
    }
    return 0;
}

void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
{
    int reslevelno, bandno, cblkno, precno;
    for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
        Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
        for (bandno = 0; bandno < rlevel->nbands; bandno++) {
            Jpeg2000Band *band = rlevel->band + bandno;
            for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) {
                Jpeg2000Prec *prec = band->prec + precno;
                tag_tree_zero(prec->zerobits, prec->nb_codeblocks_width, prec->nb_codeblocks_height);
                tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height);
                for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
                    Jpeg2000Cblk *cblk = prec->cblk + cblkno;
                    cblk->length = 0;
                    cblk->lblock = 3;
                }
            }
        }
    }
}

void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
{
    int reslevelno, bandno, precno;
    for (reslevelno = 0;
         comp->reslevel && reslevelno < codsty->nreslevels;
         reslevelno++) {
        Jpeg2000ResLevel *reslevel;

        if (!comp->reslevel)
            continue;

        reslevel = comp->reslevel + reslevelno;
        for (bandno = 0; bandno < reslevel->nbands; bandno++) {
            Jpeg2000Band *band;

            if (!reslevel->band)
                continue;

            band = reslevel->band + bandno;
            for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
                if (band->prec) {
                    Jpeg2000Prec *prec = band->prec + precno;
                    av_freep(&prec->zerobits);
                    av_freep(&prec->cblkincl);
                    av_freep(&prec->cblk);
                }
            }

            av_freep(&band->prec);
        }
        av_freep(&reslevel->band);
    }

    ff_dwt_destroy(&comp->dwt);
    av_freep(&comp->reslevel);
    av_freep(&comp->i_data);
    av_freep(&comp->f_data);
}