1 /*
2 * JPEG 2000 encoder and decoder common functions
3 * Copyright (c) 2007 Kamil Nowosad
4 * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * JPEG 2000 image encoder and decoder common functions
26 */
27
28 #include "libavutil/attributes.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/common.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/mem.h"
33 #include "avcodec.h"
34 #include "internal.h"
35 #include "jpeg2000.h"
36
37 #define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n))
38
39 /* tag tree routines */
40
41 /* allocate the memory for tag tree */
tag_tree_size(int w,int h)42 static int32_t tag_tree_size(int w, int h)
43 {
44 int64_t res = 0;
45 while (w > 1 || h > 1) {
46 res += w * (int64_t)h;
47 av_assert0(res + 1 < INT32_MAX);
48 w = (w + 1) >> 1;
49 h = (h + 1) >> 1;
50 }
51 return (int32_t)(res + 1);
52 }
53
ff_jpeg2000_tag_tree_init(int w,int h)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_mallocz_array(tt_size, sizeof(*t));
63 if (!res)
64 return NULL;
65
66 while (w > 1 || h > 1) {
67 int i, j;
68 pw = w;
69 ph = h;
70
71 w = (w + 1) >> 1;
72 h = (h + 1) >> 1;
73 t2 = t + pw * ph;
74
75 for (i = 0; i < ph; i++)
76 for (j = 0; j < pw; j++)
77 t[i * pw + j].parent = &t2[(i >> 1) * w + (j >> 1)];
78
79 t = t2;
80 }
81 t[0].parent = NULL;
82 return res;
83 }
84
tag_tree_zero(Jpeg2000TgtNode * t,int w,int h)85 static void tag_tree_zero(Jpeg2000TgtNode *t, int w, int h)
86 {
87 int i, siz = tag_tree_size(w, h);
88
89 for (i = 0; i < siz; i++) {
90 t[i].val = 0;
91 t[i].vis = 0;
92 }
93 }
94
95 uint8_t ff_jpeg2000_sigctxno_lut[256][4];
96
getsigctxno(int flag,int bandno)97 static int getsigctxno(int flag, int bandno)
98 {
99 int h, v, d;
100
101 h = ((flag & JPEG2000_T1_SIG_E) ? 1 : 0) +
102 ((flag & JPEG2000_T1_SIG_W) ? 1 : 0);
103 v = ((flag & JPEG2000_T1_SIG_N) ? 1 : 0) +
104 ((flag & JPEG2000_T1_SIG_S) ? 1 : 0);
105 d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) +
106 ((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) +
107 ((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) +
108 ((flag & JPEG2000_T1_SIG_SW) ? 1 : 0);
109
110 if (bandno < 3) {
111 if (bandno == 1)
112 FFSWAP(int, h, v);
113 if (h == 2) return 8;
114 if (h == 1) {
115 if (v >= 1) return 7;
116 if (d >= 1) return 6;
117 return 5;
118 }
119 if (v == 2) return 4;
120 if (v == 1) return 3;
121 if (d >= 2) return 2;
122 if (d == 1) return 1;
123 } else {
124 if (d >= 3) return 8;
125 if (d == 2) {
126 if (h+v >= 1) return 7;
127 return 6;
128 }
129 if (d == 1) {
130 if (h+v >= 2) return 5;
131 if (h+v == 1) return 4;
132 return 3;
133 }
134 if (h+v >= 2) return 2;
135 if (h+v == 1) return 1;
136 }
137 return 0;
138 }
139
140 uint8_t ff_jpeg2000_sgnctxno_lut[16][16], ff_jpeg2000_xorbit_lut[16][16];
141
142 static const int contribtab[3][3] = { { 0, -1, 1 }, { -1, -1, 0 }, { 1, 0, 1 } };
143 static const int ctxlbltab[3][3] = { { 13, 12, 11 }, { 10, 9, 10 }, { 11, 12, 13 } };
144 static const int xorbittab[3][3] = { { 1, 1, 1 }, { 1, 0, 0 }, { 0, 0, 0 } };
145
getsgnctxno(int flag,uint8_t * xorbit)146 static int getsgnctxno(int flag, uint8_t *xorbit)
147 {
148 int vcontrib, hcontrib;
149
150 hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1 : 2 : 0]
151 [flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1 : 2 : 0] + 1;
152 vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1 : 2 : 0]
153 [flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1 : 2 : 0] + 1;
154 *xorbit = xorbittab[hcontrib][vcontrib];
155
156 return ctxlbltab[hcontrib][vcontrib];
157 }
158
ff_jpeg2000_init_tier1_luts(void)159 void av_cold ff_jpeg2000_init_tier1_luts(void)
160 {
161 int i, j;
162 for (i = 0; i < 256; i++)
163 for (j = 0; j < 4; j++)
164 ff_jpeg2000_sigctxno_lut[i][j] = getsigctxno(i, j);
165 for (i = 0; i < 16; i++)
166 for (j = 0; j < 16; j++)
167 ff_jpeg2000_sgnctxno_lut[i][j] =
168 getsgnctxno(i + (j << 8), &ff_jpeg2000_xorbit_lut[i][j]);
169 }
170
ff_jpeg2000_set_significance(Jpeg2000T1Context * t1,int x,int y,int negative)171 void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,
172 int negative)
173 {
174 x++;
175 y++;
176 t1->flags[(y) * t1->stride + x] |= JPEG2000_T1_SIG;
177 if (negative) {
178 t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
179 t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
180 t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
181 t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
182 } else {
183 t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W;
184 t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E;
185 t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N;
186 t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S;
187 }
188 t1->flags[(y + 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_NW;
189 t1->flags[(y + 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_NE;
190 t1->flags[(y - 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_SW;
191 t1->flags[(y - 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_SE;
192 }
193
194 // static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; (unused)
195
init_band_stepsize(AVCodecContext * avctx,Jpeg2000Band * band,Jpeg2000CodingStyle * codsty,Jpeg2000QuantStyle * qntsty,int bandno,int gbandno,int reslevelno,int cbps)196 static void init_band_stepsize(AVCodecContext *avctx,
197 Jpeg2000Band *band,
198 Jpeg2000CodingStyle *codsty,
199 Jpeg2000QuantStyle *qntsty,
200 int bandno, int gbandno, int reslevelno,
201 int cbps)
202 {
203 /* TODO: Implementation of quantization step not finished,
204 * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */
205 switch (qntsty->quantsty) {
206 uint8_t gain;
207 case JPEG2000_QSTY_NONE:
208 /* TODO: to verify. No quantization in this case */
209 band->f_stepsize = 1;
210 break;
211 case JPEG2000_QSTY_SI:
212 /*TODO: Compute formula to implement. */
213 // numbps = cbps +
214 // lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];
215 // band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],
216 // 2 + numbps - qntsty->expn[gbandno]);
217 // break;
218 case JPEG2000_QSTY_SE:
219 /* Exponent quantization step.
220 * Formula:
221 * delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11))
222 * R_b = R_I + log2 (gain_b )
223 * see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */
224 gain = cbps;
225 band->f_stepsize = ff_exp2fi(gain - qntsty->expn[gbandno]);
226 band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0;
227 break;
228 default:
229 band->f_stepsize = 0;
230 av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");
231 break;
232 }
233 if (codsty->transform != FF_DWT53) {
234 int lband = 0;
235 switch (bandno + (reslevelno > 0)) {
236 case 1:
237 case 2:
238 band->f_stepsize *= F_LFTG_X * 2;
239 lband = 1;
240 break;
241 case 3:
242 band->f_stepsize *= F_LFTG_X * F_LFTG_X * 4;
243 break;
244 }
245 if (codsty->transform == FF_DWT97) {
246 band->f_stepsize *= pow(F_LFTG_K, 2*(codsty->nreslevels2decode - reslevelno) + lband - 2);
247 }
248 }
249
250 band->i_stepsize = band->f_stepsize * (1 << 15);
251
252 /* FIXME: In OpenJPEG code stepsize = stepsize * 0.5. Why?
253 * If not set output of entropic decoder is not correct. */
254 if (!av_codec_is_encoder(avctx->codec))
255 band->f_stepsize *= 0.5;
256 }
257
init_prec(Jpeg2000Band * band,Jpeg2000ResLevel * reslevel,Jpeg2000Component * comp,int precno,int bandno,int reslevelno,int log2_band_prec_width,int log2_band_prec_height)258 static int init_prec(Jpeg2000Band *band,
259 Jpeg2000ResLevel *reslevel,
260 Jpeg2000Component *comp,
261 int precno, int bandno, int reslevelno,
262 int log2_band_prec_width,
263 int log2_band_prec_height)
264 {
265 Jpeg2000Prec *prec = band->prec + precno;
266 int nb_codeblocks, cblkno;
267
268 prec->decoded_layers = 0;
269
270 /* TODO: Explain formula for JPEG200 DCINEMA. */
271 /* TODO: Verify with previous count of codeblocks per band */
272
273 /* Compute P_x0 */
274 prec->coord[0][0] = ((band->coord[0][0] >> log2_band_prec_width) + precno % reslevel->num_precincts_x) *
275 (1 << log2_band_prec_width);
276
277 /* Compute P_y0 */
278 prec->coord[1][0] = ((band->coord[1][0] >> log2_band_prec_height) + precno / reslevel->num_precincts_x) *
279 (1 << log2_band_prec_height);
280
281 /* Compute P_x1 */
282 prec->coord[0][1] = prec->coord[0][0] +
283 (1 << log2_band_prec_width);
284 prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
285 prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
286
287 /* Compute P_y1 */
288 prec->coord[1][1] = prec->coord[1][0] +
289 (1 << log2_band_prec_height);
290 prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
291 prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
292
293 prec->nb_codeblocks_width =
294 ff_jpeg2000_ceildivpow2(prec->coord[0][1],
295 band->log2_cblk_width)
296 - (prec->coord[0][0] >> band->log2_cblk_width);
297 prec->nb_codeblocks_height =
298 ff_jpeg2000_ceildivpow2(prec->coord[1][1],
299 band->log2_cblk_height)
300 - (prec->coord[1][0] >> band->log2_cblk_height);
301
302
303 /* Tag trees initialization */
304 prec->cblkincl =
305 ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
306 prec->nb_codeblocks_height);
307 if (!prec->cblkincl)
308 return AVERROR(ENOMEM);
309
310 prec->zerobits =
311 ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
312 prec->nb_codeblocks_height);
313 if (!prec->zerobits)
314 return AVERROR(ENOMEM);
315
316 if (prec->nb_codeblocks_width * (uint64_t)prec->nb_codeblocks_height > INT_MAX) {
317 prec->cblk = NULL;
318 return AVERROR(ENOMEM);
319 }
320 nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height;
321 prec->cblk = av_mallocz_array(nb_codeblocks, sizeof(*prec->cblk));
322 if (!prec->cblk)
323 return AVERROR(ENOMEM);
324 for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) {
325 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
326 int Cx0, Cy0;
327
328 /* Compute coordinates of codeblocks */
329 /* Compute Cx0*/
330 Cx0 = ((prec->coord[0][0]) >> band->log2_cblk_width) << band->log2_cblk_width;
331 Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width);
332 cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
333
334 /* Compute Cy0*/
335 Cy0 = ((prec->coord[1][0]) >> band->log2_cblk_height) << band->log2_cblk_height;
336 Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height);
337 cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
338
339 /* Compute Cx1 */
340 cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
341 prec->coord[0][1]);
342
343 /* Compute Cy1 */
344 cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
345 prec->coord[1][1]);
346 /* Update code-blocks coordinates according sub-band position */
347 if ((bandno + !!reslevelno) & 1) {
348 cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -
349 comp->reslevel[reslevelno-1].coord[0][0];
350 cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -
351 comp->reslevel[reslevelno-1].coord[0][0];
352 }
353 if ((bandno + !!reslevelno) & 2) {
354 cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -
355 comp->reslevel[reslevelno-1].coord[1][0];
356 cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -
357 comp->reslevel[reslevelno-1].coord[1][0];
358 }
359
360 cblk->lblock = 3;
361 cblk->length = 0;
362 cblk->npasses = 0;
363 }
364
365 return 0;
366 }
367
init_band(AVCodecContext * avctx,Jpeg2000ResLevel * reslevel,Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty,Jpeg2000QuantStyle * qntsty,int bandno,int gbandno,int reslevelno,int cbps,int dx,int dy)368 static int init_band(AVCodecContext *avctx,
369 Jpeg2000ResLevel *reslevel,
370 Jpeg2000Component *comp,
371 Jpeg2000CodingStyle *codsty,
372 Jpeg2000QuantStyle *qntsty,
373 int bandno, int gbandno, int reslevelno,
374 int cbps, int dx, int dy)
375 {
376 Jpeg2000Band *band = reslevel->band + bandno;
377 uint8_t log2_band_prec_width, log2_band_prec_height;
378 int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
379 int precno;
380 int nb_precincts;
381 int i, j, ret;
382
383 init_band_stepsize(avctx, band, codsty, qntsty, bandno, gbandno, reslevelno, cbps);
384
385 /* computation of tbx_0, tbx_1, tby_0, tby_1
386 * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1
387 * codeblock width and height is computed for
388 * DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */
389 if (reslevelno == 0) {
390 /* for reslevelno = 0, only one band, x0_b = y0_b = 0 */
391 for (i = 0; i < 2; i++)
392 for (j = 0; j < 2; j++)
393 band->coord[i][j] =
394 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j],
395 declvl - 1);
396 log2_band_prec_width = reslevel->log2_prec_width;
397 log2_band_prec_height = reslevel->log2_prec_height;
398 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
399 band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
400 reslevel->log2_prec_width);
401 band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
402 reslevel->log2_prec_height);
403 } else {
404 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */
405 /* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */
406 for (i = 0; i < 2; i++)
407 for (j = 0; j < 2; j++)
408 /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
409 band->coord[i][j] =
410 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] -
411 (((bandno + 1 >> i) & 1LL) << declvl - 1),
412 declvl);
413 /* TODO: Manage case of 3 band offsets here or
414 * in coding/decoding function? */
415
416 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
417 band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
418 reslevel->log2_prec_width - 1);
419 band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
420 reslevel->log2_prec_height - 1);
421
422 log2_band_prec_width = reslevel->log2_prec_width - 1;
423 log2_band_prec_height = reslevel->log2_prec_height - 1;
424 }
425
426 if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y > INT_MAX) {
427 band->prec = NULL;
428 return AVERROR(ENOMEM);
429 }
430 nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
431 band->prec = av_mallocz_array(nb_precincts, sizeof(*band->prec));
432 if (!band->prec)
433 return AVERROR(ENOMEM);
434
435 for (precno = 0; precno < nb_precincts; precno++) {
436 ret = init_prec(band, reslevel, comp,
437 precno, bandno, reslevelno,
438 log2_band_prec_width, log2_band_prec_height);
439 if (ret < 0)
440 return ret;
441 }
442
443 return 0;
444 }
445
ff_jpeg2000_init_component(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty,Jpeg2000QuantStyle * qntsty,int cbps,int dx,int dy,AVCodecContext * avctx)446 int ff_jpeg2000_init_component(Jpeg2000Component *comp,
447 Jpeg2000CodingStyle *codsty,
448 Jpeg2000QuantStyle *qntsty,
449 int cbps, int dx, int dy,
450 AVCodecContext *avctx)
451 {
452 int reslevelno, bandno, gbandno = 0, ret, i, j;
453 uint32_t csize;
454
455 if (codsty->nreslevels2decode <= 0) {
456 av_log(avctx, AV_LOG_ERROR, "nreslevels2decode %d invalid or uninitialized\n", codsty->nreslevels2decode);
457 return AVERROR_INVALIDDATA;
458 }
459
460 if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
461 codsty->nreslevels2decode - 1,
462 codsty->transform))
463 return ret;
464
465 if (av_image_check_size(comp->coord[0][1] - comp->coord[0][0],
466 comp->coord[1][1] - comp->coord[1][0], 0, avctx))
467 return AVERROR_INVALIDDATA;
468 csize = (comp->coord[0][1] - comp->coord[0][0]) *
469 (comp->coord[1][1] - comp->coord[1][0]);
470 if (comp->coord[0][1] - comp->coord[0][0] > 32768 ||
471 comp->coord[1][1] - comp->coord[1][0] > 32768) {
472 av_log(avctx, AV_LOG_ERROR, "component size too large\n");
473 return AVERROR_PATCHWELCOME;
474 }
475
476 if (codsty->transform == FF_DWT97) {
477 csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->f_data);
478 comp->i_data = NULL;
479 comp->f_data = av_mallocz_array(csize, sizeof(*comp->f_data));
480 if (!comp->f_data)
481 return AVERROR(ENOMEM);
482 } else {
483 csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->i_data);
484 comp->f_data = NULL;
485 comp->i_data = av_mallocz_array(csize, sizeof(*comp->i_data));
486 if (!comp->i_data)
487 return AVERROR(ENOMEM);
488 }
489 comp->reslevel = av_mallocz_array(codsty->nreslevels, sizeof(*comp->reslevel));
490 if (!comp->reslevel)
491 return AVERROR(ENOMEM);
492 /* LOOP on resolution levels */
493 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
494 int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
495 Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
496
497 /* Compute borders for each resolution level.
498 * Computation of trx_0, trx_1, try_0 and try_1.
499 * see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
500 for (i = 0; i < 2; i++)
501 for (j = 0; j < 2; j++)
502 reslevel->coord[i][j] =
503 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);
504 // update precincts size: 2^n value
505 reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno];
506 reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
507 if (!reslevel->log2_prec_width || !reslevel->log2_prec_height) {
508 return AVERROR_INVALIDDATA;
509 }
510
511 /* Number of bands for each resolution level */
512 if (reslevelno == 0)
513 reslevel->nbands = 1;
514 else
515 reslevel->nbands = 3;
516
517 /* Number of precincts which span the tile for resolution level reslevelno
518 * see B.6 in ISO/IEC 15444-1:2002 eq. B-16
519 * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
520 * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
521 * for Dcinema profiles in JPEG 2000
522 * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
523 * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
524 if (reslevel->coord[0][1] == reslevel->coord[0][0])
525 reslevel->num_precincts_x = 0;
526 else
527 reslevel->num_precincts_x =
528 ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
529 reslevel->log2_prec_width) -
530 (reslevel->coord[0][0] >> reslevel->log2_prec_width);
531
532 if (reslevel->coord[1][1] == reslevel->coord[1][0])
533 reslevel->num_precincts_y = 0;
534 else
535 reslevel->num_precincts_y =
536 ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
537 reslevel->log2_prec_height) -
538 (reslevel->coord[1][0] >> reslevel->log2_prec_height);
539
540 reslevel->band = av_mallocz_array(reslevel->nbands, sizeof(*reslevel->band));
541 if (!reslevel->band)
542 return AVERROR(ENOMEM);
543
544 if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y * reslevel->nbands > avctx->max_pixels / sizeof(*reslevel->band->prec))
545 return AVERROR(ENOMEM);
546
547 for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
548 ret = init_band(avctx, reslevel,
549 comp, codsty, qntsty,
550 bandno, gbandno, reslevelno,
551 cbps, dx, dy);
552 if (ret < 0)
553 return ret;
554 }
555 }
556 return 0;
557 }
558
ff_jpeg2000_reinit(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty)559 void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
560 {
561 int reslevelno, bandno, cblkno, precno;
562 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
563 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
564 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
565 Jpeg2000Band *band = rlevel->band + bandno;
566 for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) {
567 Jpeg2000Prec *prec = band->prec + precno;
568 tag_tree_zero(prec->zerobits, prec->nb_codeblocks_width, prec->nb_codeblocks_height);
569 tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height);
570 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
571 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
572 cblk->length = 0;
573 cblk->lblock = 3;
574 }
575 }
576 }
577 }
578 }
579
ff_jpeg2000_cleanup(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty)580 void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
581 {
582 int reslevelno, bandno, precno;
583 for (reslevelno = 0;
584 comp->reslevel && reslevelno < codsty->nreslevels;
585 reslevelno++) {
586 Jpeg2000ResLevel *reslevel;
587
588 if (!comp->reslevel)
589 continue;
590
591 reslevel = comp->reslevel + reslevelno;
592 for (bandno = 0; bandno < reslevel->nbands; bandno++) {
593 Jpeg2000Band *band;
594
595 if (!reslevel->band)
596 continue;
597
598 band = reslevel->band + bandno;
599 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
600 if (band->prec) {
601 Jpeg2000Prec *prec = band->prec + precno;
602 int nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
603
604 av_freep(&prec->zerobits);
605 av_freep(&prec->cblkincl);
606 if (prec->cblk) {
607 int cblkno;
608 for (cblkno = 0; cblkno < nb_code_blocks; cblkno ++) {
609 Jpeg2000Cblk *cblk = &prec->cblk[cblkno];
610 av_freep(&cblk->data);
611 av_freep(&cblk->passes);
612 av_freep(&cblk->lengthinc);
613 av_freep(&cblk->data_start);
614 }
615 av_freep(&prec->cblk);
616 }
617 }
618 }
619
620 av_freep(&band->prec);
621 }
622 av_freep(&reslevel->band);
623 }
624
625 ff_dwt_destroy(&comp->dwt);
626 av_freep(&comp->reslevel);
627 av_freep(&comp->i_data);
628 av_freep(&comp->f_data);
629 }
630