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 */
ff_tag_tree_size(int w,int h)42 int32_t ff_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 = ff_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
ff_tag_tree_zero(Jpeg2000TgtNode * t,int w,int h,int val)85 void ff_tag_tree_zero(Jpeg2000TgtNode *t, int w, int h, int val)
86 {
87 int i, siz = ff_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
getsigctxno(int flag,int bandno)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
getsgnctxno(int flag,uint8_t * xorbit)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
ff_jpeg2000_init_tier1_luts(void)160 void av_cold ff_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
ff_jpeg2000_set_significance(Jpeg2000T1Context * t1,int x,int y,int negative)172 void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,
173 int negative)
174 {
175 x++;
176 y++;
177 t1->flags[(y) * t1->stride + x] |= JPEG2000_T1_SIG;
178 if (negative) {
179 t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
180 t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
181 t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
182 t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
183 } else {
184 t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W;
185 t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E;
186 t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N;
187 t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S;
188 }
189 t1->flags[(y + 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_NW;
190 t1->flags[(y + 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_NE;
191 t1->flags[(y - 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_SW;
192 t1->flags[(y - 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_SE;
193 }
194
195 // static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; (unused)
196
init_band_stepsize(AVCodecContext * avctx,Jpeg2000Band * band,Jpeg2000CodingStyle * codsty,Jpeg2000QuantStyle * qntsty,int bandno,int gbandno,int reslevelno,int cbps)197 static void init_band_stepsize(AVCodecContext *avctx,
198 Jpeg2000Band *band,
199 Jpeg2000CodingStyle *codsty,
200 Jpeg2000QuantStyle *qntsty,
201 int bandno, int gbandno, int reslevelno,
202 int cbps)
203 {
204 /* TODO: Implementation of quantization step not finished,
205 * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */
206 switch (qntsty->quantsty) {
207 uint8_t gain;
208 case JPEG2000_QSTY_NONE:
209 /* TODO: to verify. No quantization in this case */
210 band->f_stepsize = 1;
211 break;
212 case JPEG2000_QSTY_SI:
213 /*TODO: Compute formula to implement. */
214 // numbps = cbps +
215 // lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];
216 // band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],
217 // 2 + numbps - qntsty->expn[gbandno]);
218 // break;
219 case JPEG2000_QSTY_SE:
220 /* Exponent quantization step.
221 * Formula:
222 * delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11))
223 * R_b = R_I + log2 (gain_b )
224 * see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */
225 gain = cbps;
226 band->f_stepsize = ff_exp2fi(gain - qntsty->expn[gbandno]);
227 band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0;
228 break;
229 default:
230 band->f_stepsize = 0;
231 av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");
232 break;
233 }
234 if (codsty->transform != FF_DWT53) {
235 int lband = 0;
236 switch (bandno + (reslevelno > 0)) {
237 case 1:
238 case 2:
239 band->f_stepsize *= F_LFTG_X * 2;
240 lband = 1;
241 break;
242 case 3:
243 band->f_stepsize *= F_LFTG_X * F_LFTG_X * 4;
244 break;
245 }
246 if (codsty->transform == FF_DWT97) {
247 band->f_stepsize *= pow(F_LFTG_K, 2*(codsty->nreslevels2decode - reslevelno) + lband - 2);
248 }
249 }
250
251 if (band->f_stepsize > (INT_MAX >> 15)) {
252 band->f_stepsize = 0;
253 av_log(avctx, AV_LOG_ERROR, "stepsize out of range\n");
254 }
255
256 band->i_stepsize = band->f_stepsize * (1 << 15);
257
258 /* FIXME: In OpenJPEG code stepsize = stepsize * 0.5. Why?
259 * If not set output of entropic decoder is not correct. */
260 if (!av_codec_is_encoder(avctx->codec))
261 band->f_stepsize *= 0.5;
262 }
263
init_prec(AVCodecContext * avctx,Jpeg2000Band * band,Jpeg2000ResLevel * reslevel,Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty,int precno,int bandno,int reslevelno,int log2_band_prec_width,int log2_band_prec_height)264 static int init_prec(AVCodecContext *avctx,
265 Jpeg2000Band *band,
266 Jpeg2000ResLevel *reslevel,
267 Jpeg2000Component *comp,
268 Jpeg2000CodingStyle *codsty,
269 int precno, int bandno, int reslevelno,
270 int log2_band_prec_width,
271 int log2_band_prec_height)
272 {
273 Jpeg2000Prec *prec = band->prec + precno;
274 int nb_codeblocks, cblkno;
275
276 prec->decoded_layers = 0;
277
278 /* TODO: Explain formula for JPEG200 DCINEMA. */
279 /* TODO: Verify with previous count of codeblocks per band */
280
281 /* Compute P_x0 */
282 prec->coord[0][0] = ((reslevel->coord[0][0] >> reslevel->log2_prec_width) + precno % reslevel->num_precincts_x) *
283 (1 << log2_band_prec_width);
284
285 /* Compute P_y0 */
286 prec->coord[1][0] = ((reslevel->coord[1][0] >> reslevel->log2_prec_height) + precno / reslevel->num_precincts_x) *
287 (1 << log2_band_prec_height);
288
289 /* Compute P_x1 */
290 prec->coord[0][1] = prec->coord[0][0] +
291 (1 << log2_band_prec_width);
292 prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
293 prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
294
295 /* Compute P_y1 */
296 prec->coord[1][1] = prec->coord[1][0] +
297 (1 << log2_band_prec_height);
298 prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
299 prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
300
301 prec->nb_codeblocks_width =
302 ff_jpeg2000_ceildivpow2(prec->coord[0][1],
303 band->log2_cblk_width)
304 - (prec->coord[0][0] >> band->log2_cblk_width);
305 prec->nb_codeblocks_height =
306 ff_jpeg2000_ceildivpow2(prec->coord[1][1],
307 band->log2_cblk_height)
308 - (prec->coord[1][0] >> band->log2_cblk_height);
309
310
311 /* Tag trees initialization */
312 prec->cblkincl =
313 ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
314 prec->nb_codeblocks_height);
315 if (!prec->cblkincl)
316 return AVERROR(ENOMEM);
317
318 prec->zerobits =
319 ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
320 prec->nb_codeblocks_height);
321 if (!prec->zerobits)
322 return AVERROR(ENOMEM);
323
324 if (prec->nb_codeblocks_width * (uint64_t)prec->nb_codeblocks_height > INT_MAX) {
325 prec->cblk = NULL;
326 return AVERROR(ENOMEM);
327 }
328 nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height;
329 prec->cblk = av_mallocz_array(nb_codeblocks, sizeof(*prec->cblk));
330 if (!prec->cblk)
331 return AVERROR(ENOMEM);
332 for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) {
333 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
334 int Cx0, Cy0;
335
336 /* Compute coordinates of codeblocks */
337 /* Compute Cx0*/
338 Cx0 = ((prec->coord[0][0]) >> band->log2_cblk_width) << band->log2_cblk_width;
339 Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width);
340 cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
341
342 /* Compute Cy0*/
343 Cy0 = ((prec->coord[1][0]) >> band->log2_cblk_height) << band->log2_cblk_height;
344 Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height);
345 cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
346
347 /* Compute Cx1 */
348 cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
349 prec->coord[0][1]);
350
351 /* Compute Cy1 */
352 cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
353 prec->coord[1][1]);
354 /* Update code-blocks coordinates according sub-band position */
355 if ((bandno + !!reslevelno) & 1) {
356 cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -
357 comp->reslevel[reslevelno-1].coord[0][0];
358 cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -
359 comp->reslevel[reslevelno-1].coord[0][0];
360 }
361 if ((bandno + !!reslevelno) & 2) {
362 cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -
363 comp->reslevel[reslevelno-1].coord[1][0];
364 cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -
365 comp->reslevel[reslevelno-1].coord[1][0];
366 }
367
368 cblk->lblock = 3;
369 cblk->length = 0;
370 cblk->npasses = 0;
371 if (av_codec_is_encoder(avctx->codec)) {
372 cblk->layers = av_mallocz_array(codsty->nlayers, sizeof(*cblk->layers));
373 if (!cblk->layers)
374 return AVERROR(ENOMEM);
375 }
376 }
377
378 return 0;
379 }
380
init_band(AVCodecContext * avctx,Jpeg2000ResLevel * reslevel,Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty,Jpeg2000QuantStyle * qntsty,int bandno,int gbandno,int reslevelno,int cbps,int dx,int dy)381 static int init_band(AVCodecContext *avctx,
382 Jpeg2000ResLevel *reslevel,
383 Jpeg2000Component *comp,
384 Jpeg2000CodingStyle *codsty,
385 Jpeg2000QuantStyle *qntsty,
386 int bandno, int gbandno, int reslevelno,
387 int cbps, int dx, int dy)
388 {
389 Jpeg2000Band *band = reslevel->band + bandno;
390 uint8_t log2_band_prec_width, log2_band_prec_height;
391 int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
392 int precno;
393 int nb_precincts;
394 int i, j, ret;
395
396 init_band_stepsize(avctx, band, codsty, qntsty, bandno, gbandno, reslevelno, cbps);
397
398 /* computation of tbx_0, tbx_1, tby_0, tby_1
399 * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1
400 * codeblock width and height is computed for
401 * DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */
402 if (reslevelno == 0) {
403 /* for reslevelno = 0, only one band, x0_b = y0_b = 0 */
404 for (i = 0; i < 2; i++)
405 for (j = 0; j < 2; j++)
406 band->coord[i][j] =
407 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j],
408 declvl - 1);
409 log2_band_prec_width = reslevel->log2_prec_width;
410 log2_band_prec_height = reslevel->log2_prec_height;
411 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
412 band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
413 reslevel->log2_prec_width);
414 band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
415 reslevel->log2_prec_height);
416 } else {
417 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */
418 /* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */
419 for (i = 0; i < 2; i++)
420 for (j = 0; j < 2; j++)
421 /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
422 band->coord[i][j] =
423 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] -
424 (((bandno + 1 >> i) & 1LL) << declvl - 1),
425 declvl);
426 /* TODO: Manage case of 3 band offsets here or
427 * in coding/decoding function? */
428
429 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
430 band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
431 reslevel->log2_prec_width - 1);
432 band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
433 reslevel->log2_prec_height - 1);
434
435 log2_band_prec_width = reslevel->log2_prec_width - 1;
436 log2_band_prec_height = reslevel->log2_prec_height - 1;
437 }
438
439 if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y > INT_MAX) {
440 band->prec = NULL;
441 return AVERROR(ENOMEM);
442 }
443 nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
444 band->prec = av_mallocz_array(nb_precincts, sizeof(*band->prec));
445 if (!band->prec)
446 return AVERROR(ENOMEM);
447
448 for (precno = 0; precno < nb_precincts; precno++) {
449 ret = init_prec(avctx, band, reslevel, comp, codsty,
450 precno, bandno, reslevelno,
451 log2_band_prec_width, log2_band_prec_height);
452 if (ret < 0)
453 return ret;
454 }
455
456 return 0;
457 }
458
ff_jpeg2000_init_component(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty,Jpeg2000QuantStyle * qntsty,int cbps,int dx,int dy,AVCodecContext * avctx)459 int ff_jpeg2000_init_component(Jpeg2000Component *comp,
460 Jpeg2000CodingStyle *codsty,
461 Jpeg2000QuantStyle *qntsty,
462 int cbps, int dx, int dy,
463 AVCodecContext *avctx)
464 {
465 int reslevelno, bandno, gbandno = 0, ret, i, j;
466 uint32_t csize;
467
468 if (codsty->nreslevels2decode <= 0) {
469 av_log(avctx, AV_LOG_ERROR, "nreslevels2decode %d invalid or uninitialized\n", codsty->nreslevels2decode);
470 return AVERROR_INVALIDDATA;
471 }
472
473 if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
474 codsty->nreslevels2decode - 1,
475 codsty->transform))
476 return ret;
477
478 if (av_image_check_size(comp->coord[0][1] - comp->coord[0][0],
479 comp->coord[1][1] - comp->coord[1][0], 0, avctx))
480 return AVERROR_INVALIDDATA;
481 csize = (comp->coord[0][1] - comp->coord[0][0]) *
482 (comp->coord[1][1] - comp->coord[1][0]);
483 if (comp->coord[0][1] - comp->coord[0][0] > 32768 ||
484 comp->coord[1][1] - comp->coord[1][0] > 32768) {
485 av_log(avctx, AV_LOG_ERROR, "component size too large\n");
486 return AVERROR_PATCHWELCOME;
487 }
488
489 if (codsty->transform == FF_DWT97) {
490 csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->f_data);
491 comp->i_data = NULL;
492 comp->f_data = av_mallocz_array(csize, sizeof(*comp->f_data));
493 if (!comp->f_data)
494 return AVERROR(ENOMEM);
495 } else {
496 csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->i_data);
497 comp->f_data = NULL;
498 comp->i_data = av_mallocz_array(csize, sizeof(*comp->i_data));
499 if (!comp->i_data)
500 return AVERROR(ENOMEM);
501 }
502 comp->reslevel = av_mallocz_array(codsty->nreslevels, sizeof(*comp->reslevel));
503 if (!comp->reslevel)
504 return AVERROR(ENOMEM);
505 /* LOOP on resolution levels */
506 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
507 int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
508 Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
509
510 /* Compute borders for each resolution level.
511 * Computation of trx_0, trx_1, try_0 and try_1.
512 * see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
513 for (i = 0; i < 2; i++)
514 for (j = 0; j < 2; j++)
515 reslevel->coord[i][j] =
516 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);
517 // update precincts size: 2^n value
518 reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno];
519 reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
520
521 /* Number of bands for each resolution level */
522 if (reslevelno == 0)
523 reslevel->nbands = 1;
524 else
525 reslevel->nbands = 3;
526
527 /* Number of precincts which span the tile for resolution level reslevelno
528 * see B.6 in ISO/IEC 15444-1:2002 eq. B-16
529 * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
530 * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
531 * for Dcinema profiles in JPEG 2000
532 * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
533 * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
534 if (reslevel->coord[0][1] == reslevel->coord[0][0])
535 reslevel->num_precincts_x = 0;
536 else
537 reslevel->num_precincts_x =
538 ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
539 reslevel->log2_prec_width) -
540 (reslevel->coord[0][0] >> reslevel->log2_prec_width);
541
542 if (reslevel->coord[1][1] == reslevel->coord[1][0])
543 reslevel->num_precincts_y = 0;
544 else
545 reslevel->num_precincts_y =
546 ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
547 reslevel->log2_prec_height) -
548 (reslevel->coord[1][0] >> reslevel->log2_prec_height);
549
550 reslevel->band = av_mallocz_array(reslevel->nbands, sizeof(*reslevel->band));
551 if (!reslevel->band)
552 return AVERROR(ENOMEM);
553
554 if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y * reslevel->nbands > avctx->max_pixels / sizeof(*reslevel->band->prec))
555 return AVERROR(ENOMEM);
556
557 for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
558 ret = init_band(avctx, reslevel,
559 comp, codsty, qntsty,
560 bandno, gbandno, reslevelno,
561 cbps, dx, dy);
562 if (ret < 0)
563 return ret;
564 }
565 }
566 return 0;
567 }
568
ff_jpeg2000_reinit(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty)569 void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
570 {
571 int reslevelno, bandno, cblkno, precno;
572 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
573 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
574 for (bandno = 0; bandno < rlevel->nbands; bandno++) {
575 Jpeg2000Band *band = rlevel->band + bandno;
576 for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) {
577 Jpeg2000Prec *prec = band->prec + precno;
578 ff_tag_tree_zero(prec->zerobits, prec->nb_codeblocks_width, prec->nb_codeblocks_height, 0);
579 ff_tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height, 0);
580 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
581 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
582 cblk->length = 0;
583 cblk->lblock = 3;
584 }
585 }
586 }
587 }
588 }
589
ff_jpeg2000_cleanup(Jpeg2000Component * comp,Jpeg2000CodingStyle * codsty)590 void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
591 {
592 int reslevelno, bandno, precno;
593 for (reslevelno = 0;
594 comp->reslevel && reslevelno < codsty->nreslevels;
595 reslevelno++) {
596 Jpeg2000ResLevel *reslevel;
597
598 if (!comp->reslevel)
599 continue;
600
601 reslevel = comp->reslevel + reslevelno;
602 for (bandno = 0; bandno < reslevel->nbands; bandno++) {
603 Jpeg2000Band *band;
604
605 if (!reslevel->band)
606 continue;
607
608 band = reslevel->band + bandno;
609 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
610 if (band->prec) {
611 Jpeg2000Prec *prec = band->prec + precno;
612 int nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
613
614 av_freep(&prec->zerobits);
615 av_freep(&prec->cblkincl);
616 if (prec->cblk) {
617 int cblkno;
618 for (cblkno = 0; cblkno < nb_code_blocks; cblkno ++) {
619 Jpeg2000Cblk *cblk = &prec->cblk[cblkno];
620 av_freep(&cblk->data);
621 av_freep(&cblk->passes);
622 av_freep(&cblk->lengthinc);
623 av_freep(&cblk->data_start);
624 av_freep(&cblk->layers);
625 }
626 av_freep(&prec->cblk);
627 }
628 }
629 }
630
631 av_freep(&band->prec);
632 }
633 av_freep(&reslevel->band);
634 }
635
636 ff_dwt_destroy(&comp->dwt);
637 av_freep(&comp->reslevel);
638 av_freep(&comp->i_data);
639 av_freep(&comp->f_data);
640 }
641