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/mem.h"
32 #include "avcodec.h"
33 #include "jpeg2000.h"
34
35 #define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n))
36
37 /* tag tree routines */
38
39 /* allocate the memory for tag tree */
tag_tree_size(uint16_t w,uint16_t h)40 static int32_t tag_tree_size(uint16_t w, uint16_t h)
41 {
42 uint32_t res = 0;
43 while (w > 1 || h > 1) {
44 res += w * h;
45 av_assert0(res + 1 < INT32_MAX);
46 w = (w + 1) >> 1;
47 h = (h + 1) >> 1;
48 }
49 return (int32_t)(res + 1);
50 }
51
ff_jpeg2000_tag_tree_init(int w,int h)52 static Jpeg2000TgtNode *ff_jpeg2000_tag_tree_init(int w, int h)
53 {
54 int pw = w, ph = h;
55 Jpeg2000TgtNode *res, *t, *t2;
56 int32_t tt_size;
57
58 tt_size = tag_tree_size(w, h);
59
60 t = res = av_mallocz_array(tt_size, sizeof(*t));
61 if (!res)
62 return NULL;
63
64 while (w > 1 || h > 1) {
65 int i, j;
66 pw = w;
67 ph = h;
68
69 w = (w + 1) >> 1;
70 h = (h + 1) >> 1;
71 t2 = t + pw * ph;
72
73 for (i = 0; i < ph; i++)
74 for (j = 0; j < pw; j++)
75 t[i * pw + j].parent = &t2[(i >> 1) * w + (j >> 1)];
76
77 t = t2;
78 }
79 t[0].parent = NULL;
80 return res;
81 }
82
tag_tree_zero(Jpeg2000TgtNode * t,int w,int h)83 static void tag_tree_zero(Jpeg2000TgtNode *t, int w, int h)
84 {
85 int i, siz = tag_tree_size(w, h);
86
87 for (i = 0; i < siz; i++) {
88 t[i].val = 0;
89 t[i].vis = 0;
90 }
91 }
92
93 uint8_t ff_jpeg2000_sigctxno_lut[256][4];
94
getsigctxno(int flag,int bandno)95 static int getsigctxno(int flag, int bandno)
96 {
97 int h, v, d;
98
99 h = ((flag & JPEG2000_T1_SIG_E) ? 1 : 0) +
100 ((flag & JPEG2000_T1_SIG_W) ? 1 : 0);
101 v = ((flag & JPEG2000_T1_SIG_N) ? 1 : 0) +
102 ((flag & JPEG2000_T1_SIG_S) ? 1 : 0);
103 d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) +
104 ((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) +
105 ((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) +
106 ((flag & JPEG2000_T1_SIG_SW) ? 1 : 0);
107
108 if (bandno < 3) {
109 if (bandno == 1)
110 FFSWAP(int, h, v);
111 if (h == 2) return 8;
112 if (h == 1) {
113 if (v >= 1) return 7;
114 if (d >= 1) return 6;
115 return 5;
116 }
117 if (v == 2) return 4;
118 if (v == 1) return 3;
119 if (d >= 2) return 2;
120 if (d == 1) return 1;
121 } else {
122 if (d >= 3) return 8;
123 if (d == 2) {
124 if (h+v >= 1) return 7;
125 return 6;
126 }
127 if (d == 1) {
128 if (h+v >= 2) return 5;
129 if (h+v == 1) return 4;
130 return 3;
131 }
132 if (h+v >= 2) return 2;
133 if (h+v == 1) return 1;
134 }
135 return 0;
136 }
137
138 uint8_t ff_jpeg2000_sgnctxno_lut[16][16], ff_jpeg2000_xorbit_lut[16][16];
139
140 static const int contribtab[3][3] = { { 0, -1, 1 }, { -1, -1, 0 }, { 1, 0, 1 } };
141 static const int ctxlbltab[3][3] = { { 13, 12, 11 }, { 10, 9, 10 }, { 11, 12, 13 } };
142 static const int xorbittab[3][3] = { { 1, 1, 1 }, { 1, 0, 0 }, { 0, 0, 0 } };
143
getsgnctxno(int flag,uint8_t * xorbit)144 static int getsgnctxno(int flag, uint8_t *xorbit)
145 {
146 int vcontrib, hcontrib;
147
148 hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1 : 2 : 0]
149 [flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1 : 2 : 0] + 1;
150 vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1 : 2 : 0]
151 [flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1 : 2 : 0] + 1;
152 *xorbit = xorbittab[hcontrib][vcontrib];
153
154 return ctxlbltab[hcontrib][vcontrib];
155 }
156
ff_jpeg2000_init_tier1_luts(void)157 void av_cold ff_jpeg2000_init_tier1_luts(void)
158 {
159 int i, j;
160 for (i = 0; i < 256; i++)
161 for (j = 0; j < 4; j++)
162 ff_jpeg2000_sigctxno_lut[i][j] = getsigctxno(i, j);
163 for (i = 0; i < 16; i++)
164 for (j = 0; j < 16; j++)
165 ff_jpeg2000_sgnctxno_lut[i][j] =
166 getsgnctxno(i + (j << 8), &ff_jpeg2000_xorbit_lut[i][j]);
167 }
168
ff_jpeg2000_set_significance(Jpeg2000T1Context * t1,int x,int y,int negative)169 void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,
170 int negative)
171 {
172 x++;
173 y++;
174 t1->flags[y][x] |= JPEG2000_T1_SIG;
175 if (negative) {
176 t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
177 t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
178 t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
179 t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
180 } else {
181 t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W;
182 t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E;
183 t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N;
184 t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S;
185 }
186 t1->flags[y + 1][x + 1] |= JPEG2000_T1_SIG_NW;
187 t1->flags[y + 1][x - 1] |= JPEG2000_T1_SIG_NE;
188 t1->flags[y - 1][x + 1] |= JPEG2000_T1_SIG_SW;
189 t1->flags[y - 1][x - 1] |= JPEG2000_T1_SIG_SE;
190 }
191
192 static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } };
193
ff_jpeg2000_init_component(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty,Jpeg2000QuantStyle * qntsty,int cbps,int dx,int dy,AVCodecContext * avctx)194 int ff_jpeg2000_init_component(Jpeg2000Component *comp,
195 Jpeg2000CodingStyle *codsty,
196 Jpeg2000QuantStyle *qntsty,
197 int cbps, int dx, int dy,
198 AVCodecContext *avctx)
199 {
200 uint8_t log2_band_prec_width, log2_band_prec_height;
201 int reslevelno, bandno, gbandno = 0, ret, i, j;
202 uint32_t csize;
203
204 if (codsty->nreslevels2decode <= 0) {
205 av_log(avctx, AV_LOG_ERROR, "nreslevels2decode %d invalid or uninitialized\n", codsty->nreslevels2decode);
206 return AVERROR_INVALIDDATA;
207 }
208
209 if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
210 codsty->nreslevels2decode - 1,
211 codsty->transform))
212 return ret;
213 // component size comp->coord is uint16_t so ir cannot overflow
214 csize = (comp->coord[0][1] - comp->coord[0][0]) *
215 (comp->coord[1][1] - comp->coord[1][0]);
216
217 if (codsty->transform == FF_DWT97) {
218 comp->i_data = NULL;
219 comp->f_data = av_mallocz_array(csize, sizeof(*comp->f_data));
220 if (!comp->f_data)
221 return AVERROR(ENOMEM);
222 } else {
223 comp->f_data = NULL;
224 comp->i_data = av_mallocz_array(csize, sizeof(*comp->i_data));
225 if (!comp->i_data)
226 return AVERROR(ENOMEM);
227 }
228 comp->reslevel = av_mallocz_array(codsty->nreslevels, sizeof(*comp->reslevel));
229 if (!comp->reslevel)
230 return AVERROR(ENOMEM);
231 /* LOOP on resolution levels */
232 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
233 int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
234 Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
235
236 /* Compute borders for each resolution level.
237 * Computation of trx_0, trx_1, try_0 and try_1.
238 * see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
239 for (i = 0; i < 2; i++)
240 for (j = 0; j < 2; j++)
241 reslevel->coord[i][j] =
242 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);
243 // update precincts size: 2^n value
244 reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno];
245 reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
246
247 /* Number of bands for each resolution level */
248 if (reslevelno == 0)
249 reslevel->nbands = 1;
250 else
251 reslevel->nbands = 3;
252
253 /* Number of precincts which span the tile for resolution level reslevelno
254 * see B.6 in ISO/IEC 15444-1:2002 eq. B-16
255 * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
256 * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
257 * for Dcinema profiles in JPEG 2000
258 * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
259 * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
260 if (reslevel->coord[0][1] == reslevel->coord[0][0])
261 reslevel->num_precincts_x = 0;
262 else
263 reslevel->num_precincts_x =
264 ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
265 reslevel->log2_prec_width) -
266 (reslevel->coord[0][0] >> reslevel->log2_prec_width);
267
268 if (reslevel->coord[1][1] == reslevel->coord[1][0])
269 reslevel->num_precincts_y = 0;
270 else
271 reslevel->num_precincts_y =
272 ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
273 reslevel->log2_prec_height) -
274 (reslevel->coord[1][0] >> reslevel->log2_prec_height);
275
276 reslevel->band = av_mallocz_array(reslevel->nbands, sizeof(*reslevel->band));
277 if (!reslevel->band)
278 return AVERROR(ENOMEM);
279
280 for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
281 Jpeg2000Band *band = reslevel->band + bandno;
282 int cblkno, precno;
283 int nb_precincts;
284
285 /* TODO: Implementation of quantization step not finished,
286 * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */
287 switch (qntsty->quantsty) {
288 uint8_t gain;
289 int numbps;
290 case JPEG2000_QSTY_NONE:
291 /* TODO: to verify. No quantization in this case */
292 band->f_stepsize = 1;
293 break;
294 case JPEG2000_QSTY_SI:
295 /*TODO: Compute formula to implement. */
296 numbps = cbps +
297 lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];
298 band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],
299 2 + numbps - qntsty->expn[gbandno]);
300 break;
301 case JPEG2000_QSTY_SE:
302 /* Exponent quantization step.
303 * Formula:
304 * delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11))
305 * R_b = R_I + log2 (gain_b )
306 * see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */
307 /* TODO/WARN: value of log2 (gain_b ) not taken into account
308 * but it works (compared to OpenJPEG). Why?
309 * Further investigation needed. */
310 gain = cbps;
311 band->f_stepsize = pow(2.0, gain - qntsty->expn[gbandno]);
312 band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0;
313 break;
314 default:
315 band->f_stepsize = 0;
316 av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");
317 break;
318 }
319 /* FIXME: In openjepg code stespize = stepsize * 0.5. Why?
320 * If not set output of entropic decoder is not correct. */
321 if (!av_codec_is_encoder(avctx->codec))
322 band->f_stepsize *= 0.5;
323
324 band->i_stepsize = band->f_stepsize * (1 << 15);
325
326 /* computation of tbx_0, tbx_1, tby_0, tby_1
327 * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1
328 * codeblock width and height is computed for
329 * DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */
330 if (reslevelno == 0) {
331 /* for reslevelno = 0, only one band, x0_b = y0_b = 0 */
332 for (i = 0; i < 2; i++)
333 for (j = 0; j < 2; j++)
334 band->coord[i][j] =
335 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - comp->coord_o[i][0],
336 declvl - 1);
337 log2_band_prec_width = reslevel->log2_prec_width;
338 log2_band_prec_height = reslevel->log2_prec_height;
339 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
340 band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
341 reslevel->log2_prec_width);
342 band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
343 reslevel->log2_prec_height);
344 } else {
345 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */
346 /* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */
347 for (i = 0; i < 2; i++)
348 for (j = 0; j < 2; j++)
349 /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
350 band->coord[i][j] =
351 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - comp->coord_o[i][0] -
352 (((bandno + 1 >> i) & 1) << declvl - 1),
353 declvl);
354 /* TODO: Manage case of 3 band offsets here or
355 * in coding/decoding function? */
356
357 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
358 band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
359 reslevel->log2_prec_width - 1);
360 band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
361 reslevel->log2_prec_height - 1);
362
363 log2_band_prec_width = reslevel->log2_prec_width - 1;
364 log2_band_prec_height = reslevel->log2_prec_height - 1;
365 }
366
367 for (j = 0; j < 2; j++)
368 band->coord[0][j] = ff_jpeg2000_ceildiv(band->coord[0][j], dx);
369 for (j = 0; j < 2; j++)
370 band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy);
371
372 band->prec = av_mallocz_array(reslevel->num_precincts_x *
373 (uint64_t)reslevel->num_precincts_y,
374 sizeof(*band->prec));
375 if (!band->prec)
376 return AVERROR(ENOMEM);
377
378 nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
379
380 for (precno = 0; precno < nb_precincts; precno++) {
381 Jpeg2000Prec *prec = band->prec + precno;
382
383 /* TODO: Explain formula for JPEG200 DCINEMA. */
384 /* TODO: Verify with previous count of codeblocks per band */
385
386 /* Compute P_x0 */
387 prec->coord[0][0] = (precno % reslevel->num_precincts_x) *
388 (1 << log2_band_prec_width);
389 prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
390
391 /* Compute P_y0 */
392 prec->coord[1][0] = (precno / reslevel->num_precincts_x) *
393 (1 << log2_band_prec_height);
394 prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
395
396 /* Compute P_x1 */
397 prec->coord[0][1] = prec->coord[0][0] +
398 (1 << log2_band_prec_width);
399 prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
400
401 /* Compute P_y1 */
402 prec->coord[1][1] = prec->coord[1][0] +
403 (1 << log2_band_prec_height);
404 prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
405
406 prec->nb_codeblocks_width =
407 ff_jpeg2000_ceildivpow2(prec->coord[0][1] -
408 prec->coord[0][0],
409 band->log2_cblk_width);
410 prec->nb_codeblocks_height =
411 ff_jpeg2000_ceildivpow2(prec->coord[1][1] -
412 prec->coord[1][0],
413 band->log2_cblk_height);
414
415 /* Tag trees initialization */
416 prec->cblkincl =
417 ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
418 prec->nb_codeblocks_height);
419 if (!prec->cblkincl)
420 return AVERROR(ENOMEM);
421
422 prec->zerobits =
423 ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
424 prec->nb_codeblocks_height);
425 if (!prec->zerobits)
426 return AVERROR(ENOMEM);
427
428 prec->cblk = av_mallocz_array(prec->nb_codeblocks_width *
429 (uint64_t)prec->nb_codeblocks_height,
430 sizeof(*prec->cblk));
431 if (!prec->cblk)
432 return AVERROR(ENOMEM);
433 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
434 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
435 uint16_t Cx0, Cy0;
436
437 /* Compute coordinates of codeblocks */
438 /* Compute Cx0*/
439 Cx0 = (prec->coord[0][0] >> band->log2_cblk_width) << band->log2_cblk_width;
440 Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width);
441 cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
442
443 /* Compute Cy0*/
444 Cy0 = (prec->coord[1][0] >> band->log2_cblk_height) << band->log2_cblk_height;
445 Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height);
446 cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
447
448 /* Compute Cx1 */
449 cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
450 prec->coord[0][1]);
451
452 /* Compute Cy1 */
453 cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
454 prec->coord[1][1]);
455 /* Update code-blocks coordinates according sub-band position */
456 if ((bandno + !!reslevelno) & 1) {
457 cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -
458 comp->reslevel[reslevelno-1].coord[0][0];
459 cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -
460 comp->reslevel[reslevelno-1].coord[0][0];
461 }
462 if ((bandno + !!reslevelno) & 2) {
463 cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -
464 comp->reslevel[reslevelno-1].coord[1][0];
465 cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -
466 comp->reslevel[reslevelno-1].coord[1][0];
467 }
468
469 cblk->zero = 0;
470 cblk->lblock = 3;
471 cblk->length = 0;
472 cblk->lengthinc = 0;
473 cblk->npasses = 0;
474 }
475 }
476 }
477 }
478 return 0;
479 }
480
ff_jpeg2000_reinit(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty)481 void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
482 {
483 int reslevelno, bandno, cblkno, precno;
484 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
485 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
486 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
487 Jpeg2000Band *band = rlevel->band + bandno;
488 for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) {
489 Jpeg2000Prec *prec = band->prec + precno;
490 tag_tree_zero(prec->zerobits, prec->nb_codeblocks_width, prec->nb_codeblocks_height);
491 tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height);
492 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
493 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
494 cblk->length = 0;
495 cblk->lblock = 3;
496 }
497 }
498 }
499 }
500 }
501
ff_jpeg2000_cleanup(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty)502 void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
503 {
504 int reslevelno, bandno, precno;
505 for (reslevelno = 0;
506 comp->reslevel && reslevelno < codsty->nreslevels;
507 reslevelno++) {
508 Jpeg2000ResLevel *reslevel;
509
510 if (!comp->reslevel)
511 continue;
512
513 reslevel = comp->reslevel + reslevelno;
514 for (bandno = 0; bandno < reslevel->nbands; bandno++) {
515 Jpeg2000Band *band;
516
517 if (!reslevel->band)
518 continue;
519
520 band = reslevel->band + bandno;
521 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
522 if (band->prec) {
523 Jpeg2000Prec *prec = band->prec + precno;
524 av_freep(&prec->zerobits);
525 av_freep(&prec->cblkincl);
526 av_freep(&prec->cblk);
527 }
528 }
529
530 av_freep(&band->prec);
531 }
532 av_freep(&reslevel->band);
533 }
534
535 ff_dwt_destroy(&comp->dwt);
536 av_freep(&comp->reslevel);
537 av_freep(&comp->i_data);
538 av_freep(&comp->f_data);
539 }
540