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jpeg2000: Calculate code-block coord in ff_jpeg2000_init_component()
[libav.git] / libavcodec / jpeg2000.c
CommitLineData
c81a7063
NB		 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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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/common.h"
29#include "libavutil/mem.h"
30#include "avcodec.h"
31#include "jpeg2000.h"
32
33#define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n))
34
35/* tag tree routines */
36
37/* allocate the memory for tag tree */
38static int32_t tag_tree_size(uint16_t w, uint16_t h)
39{
40 uint32_t res = 0;
41 while (w > 1 || h > 1) {
42 res += w * h;
43 if (res + 1 >= INT32_MAX)
44 return -1;
45 w = (w + 1) >> 1;
46 h = (h + 1) >> 1;
47 }
48 return (int32_t)(res + 1);
49}
50
51static Jpeg2000TgtNode *ff_jpeg2000_tag_tree_init(int w, int h)
52{
53 int pw = w, ph = h;
54 Jpeg2000TgtNode *res, *t, *t2;
55 int32_t tt_size;
56
57 tt_size = tag_tree_size(w, h);
58 if (tt_size == -1)
59 return NULL;
60
61 t = res = av_mallocz_array(tt_size, sizeof(*t));
62 if (!res)
63 return NULL;
64
65 while (w > 1 || h > 1) {
66 int i, j;
67 pw = w;
68 ph = h;
69
70 w = (w + 1) >> 1;
71 h = (h + 1) >> 1;
72 t2 = t + pw * ph;
73
74 for (i = 0; i < ph; i++)
75 for (j = 0; j < pw; j++)
76 t[i * pw + j].parent = &t2[(i >> 1) * w + (j >> 1)];
77
78 t = t2;
79 }
80 t[0].parent = NULL;
81 return res;
82}
83
84uint8_t ff_jpeg2000_sigctxno_lut[256][4];
85
86static int getsigctxno(int flag, int bandno)
87{
88 int h, v, d;
89
90 h = ((flag & JPEG2000_T1_SIG_E) ? 1 : 0) +
91 ((flag & JPEG2000_T1_SIG_W) ? 1 : 0);
92 v = ((flag & JPEG2000_T1_SIG_N) ? 1 : 0) +
93 ((flag & JPEG2000_T1_SIG_S) ? 1 : 0);
94 d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) +
95 ((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) +
96 ((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) +
97 ((flag & JPEG2000_T1_SIG_SW) ? 1 : 0);
98 if (bandno < 3) {
99 if (bandno == 1)
100 FFSWAP(int, h, v);
101 if (h == 2)
102 return 8;
103 if (h == 1) {
104 if (v >= 1)
105 return 7;
106 if (d >= 1)
107 return 6;
108 return 5;
109 }
110 if (v == 2)
111 return 4;
112 if (v == 1)
113 return 3;
114 if (d >= 2)
115 return 2;
116 if (d == 1)
117 return 1;
c81a7063
NB		 118 } else {
119 if (d >= 3)
120 return 8;
121 if (d == 2) {
122 if (h + v >= 1)
123 return 7;
124 return 6;
125 }
126 if (d == 1) {
127 if (h + v >= 2)
128 return 5;
129 if (h + v == 1)
130 return 4;
131 return 3;
132 }
133 if (h + v >= 2)
134 return 2;
135 if (h + v == 1)
136 return 1;
c81a7063
NB		 137 }
138 return 0;
139}
140
141uint8_t ff_jpeg2000_sgnctxno_lut[16][16], ff_jpeg2000_xorbit_lut[16][16];
142
143static const int contribtab[3][3] = { { 0, -1, 1 }, { -1, -1, 0 }, { 1, 0, 1 } };
144static const int ctxlbltab[3][3] = { { 13, 12, 11 }, { 10, 9, 10 }, { 11, 12, 13 } };
145static const int xorbittab[3][3] = { { 1, 1, 1 }, { 1, 0, 0 }, { 0, 0, 0 } };
146
147static 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
160void 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
172void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,
173 int negative)
174{
175 x++;
176 y++;
177 t1->flags[y][x] |= JPEG2000_T1_SIG;
178 if (negative) {
179 t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
180 t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
181 t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
182 t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
183 } else {
184 t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W;
185 t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E;
186 t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N;
187 t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S;
188 }
189 t1->flags[y + 1][x + 1] |= JPEG2000_T1_SIG_NW;
190 t1->flags[y + 1][x - 1] |= JPEG2000_T1_SIG_NE;
191 t1->flags[y - 1][x + 1] |= JPEG2000_T1_SIG_SW;
192 t1->flags[y - 1][x - 1] |= JPEG2000_T1_SIG_SE;
193}
194
195static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } };
196
197int ff_jpeg2000_init_component(Jpeg2000Component *comp,
198 Jpeg2000CodingStyle *codsty,
199 Jpeg2000QuantStyle *qntsty,
200 int cbps, int dx, int dy,
201 AVCodecContext *avctx)
202{
203 uint8_t log2_band_prec_width, log2_band_prec_height;
204 int reslevelno, bandno, gbandno = 0, ret, i, j;
205 uint32_t csize = 1;
206
78962d3d
MN		 207 if (!codsty->nreslevels2decode) {
208 av_log(avctx, AV_LOG_ERROR, "nreslevels2decode uninitialized\n");
209 return AVERROR_INVALIDDATA;
210 }
211
c81a7063
NB		 212 if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
213 codsty->nreslevels2decode - 1,
214 codsty->transform))
215 return ret;
216 // component size comp->coord is uint16_t so ir cannot overflow
217 csize = (comp->coord[0][1] - comp->coord[0][0]) *
218 (comp->coord[1][1] - comp->coord[1][0]);
219
220 comp->data = av_malloc_array(csize, sizeof(*comp->data));
221 if (!comp->data)
222 return AVERROR(ENOMEM);
223 comp->reslevel = av_malloc_array(codsty->nreslevels, sizeof(*comp->reslevel));
224 if (!comp->reslevel)
225 return AVERROR(ENOMEM);
226 /* LOOP on resolution levels */
227 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
228 int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
229 Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
230
231 /* Compute borders for each resolution level.
232 * Computation of trx_0, trx_1, try_0 and try_1.
233 * see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
234 for (i = 0; i < 2; i++)
235 for (j = 0; j < 2; j++)
236 reslevel->coord[i][j] =
237 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);
238 // update precincts size: 2^n value
239 reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno];
240 reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
241
242 /* Number of bands for each resolution level */
243 if (reslevelno == 0)
244 reslevel->nbands = 1;
245 else
246 reslevel->nbands = 3;
247
248 /* Number of precincts wich span the tile for resolution level reslevelno
249 * see B.6 in ISO/IEC 15444-1:2002 eq. B-16
250 * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
251 * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
252 * for Dcinema profiles in JPEG 2000
253 * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
254 * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
255 if (reslevel->coord[0][1] == reslevel->coord[0][0])
256 reslevel->num_precincts_x = 0;
257 else
258 reslevel->num_precincts_x =
259 ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
260 reslevel->log2_prec_width) -
261 (reslevel->coord[0][0] >> reslevel->log2_prec_width);
262
263 if (reslevel->coord[1][1] == reslevel->coord[1][0])
264 reslevel->num_precincts_y = 0;
265 else
266 reslevel->num_precincts_y =
267 ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
268 reslevel->log2_prec_height) -
269 (reslevel->coord[1][0] >> reslevel->log2_prec_height);
270
271 reslevel->band = av_malloc_array(reslevel->nbands, sizeof(*reslevel->band));
272 if (!reslevel->band)
273 return AVERROR(ENOMEM);
274
275 for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
276 Jpeg2000Band *band = reslevel->band + bandno;
277 int cblkno, precno;
278 int nb_precincts;
279
280 /* TODO: Implementation of quantization step not finished,
281 * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */
282 switch (qntsty->quantsty) {
283 uint8_t gain;
284 int numbps;
285 case JPEG2000_QSTY_NONE:
286 /* TODO: to verify. No quantization in this case */
287 numbps = cbps +
4cbd5ed1 288 lut_gain[codsty->transform][bandno + (reslevelno > 0)];
c81a7063
NB		 289 band->stepsize = (float)SHL(2048 + qntsty->mant[gbandno],
290 2 + numbps - qntsty->expn[gbandno]);
291 break;
292 case JPEG2000_QSTY_SI:
293 /*TODO: Compute formula to implement. */
294 band->stepsize = (float) (1 << 13);
295 break;
296 case JPEG2000_QSTY_SE:
297 /* Exponent quantization step.
298 * Formula:
299 * delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11))
300 * R_b = R_I + log2 (gain_b )
301 * see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */
302 /* TODO/WARN: value of log2 (gain_b ) not taken into account
303 * but it works (compared to OpenJPEG). Why?
304 * Further investigation needed. */
305 gain = cbps;
306 band->stepsize = pow(2.0, gain - qntsty->expn[gbandno]);
307 band->stepsize *= (float)qntsty->mant[gbandno] / 2048.0 + 1.0;
308 /* FIXME: In openjepg code stespize = stepsize * 0.5. Why?
309 * If not set output of entropic decoder is not correct. */
310 band->stepsize *= 0.5;
311 break;
312 default:
313 band->stepsize = 0;
314 av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");
315 break;
316 }
317 /* BITEXACT computing case --> convert to int */
318 if (avctx->flags & CODEC_FLAG_BITEXACT)
319 band->stepsize = (int32_t)(band->stepsize * (1 << 16));
320
321 /* computation of tbx_0, tbx_1, tby_0, tby_1
322 * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1
323 * codeblock width and height is computed for
324 * DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */
325 if (reslevelno == 0) {
326 /* for reslevelno = 0, only one band, x0_b = y0_b = 0 */
327 for (i = 0; i < 2; i++)
328 for (j = 0; j < 2; j++)
329 band->coord[i][j] =
330 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j],
331 declvl - 1);
332
333 log2_band_prec_width = reslevel->log2_prec_width;
334 log2_band_prec_height = reslevel->log2_prec_height;
335 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
336 band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
337 reslevel->log2_prec_width);
338 band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
339 reslevel->log2_prec_height);
340 } else {
341 /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */
342 /* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */
343 for (i = 0; i < 2; i++)
344 for (j = 0; j < 2; j++)
345 /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
346 band->coord[i][j] =
347 ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] -
348 (((bandno + 1 >> i) & 1) << declvl - 1),
349 declvl);
350 /* TODO: Manage case of 3 band offsets here or
351 * in coding/decoding function? */
352
353 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
354 band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
355 reslevel->log2_prec_width - 1);
356 band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
357 reslevel->log2_prec_height - 1);
358
359 log2_band_prec_width = reslevel->log2_prec_width - 1;
360 log2_band_prec_height = reslevel->log2_prec_height - 1;
361 }
362
363 band->prec = av_malloc_array(reslevel->num_precincts_x *
364 reslevel->num_precincts_y,
365 sizeof(*band->prec));
366 if (!band->prec)
367 return AVERROR(ENOMEM);
368
369 nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
370
371 for (precno = 0; precno < nb_precincts; precno++) {
372 Jpeg2000Prec *prec = band->prec + precno;
373
374 /* TODO: Explain formula for JPEG200 DCINEMA. */
375 /* TODO: Verify with previous count of codeblocks per band */
376
377 /* Compute P_x0 */
378 prec->coord[0][0] = (precno % reslevel->num_precincts_x) *
379 (1 << log2_band_prec_width);
380 prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
381
382 /* Compute P_y0 */
383 prec->coord[1][0] = (precno / reslevel->num_precincts_x) *
384 (1 << log2_band_prec_height);
385 prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
386
387 /* Compute P_x1 */
388 prec->coord[0][1] = prec->coord[0][0] +
389 (1 << log2_band_prec_width);
390 prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
391
392 /* Compute P_y1 */
393 prec->coord[1][1] = prec->coord[1][0] +
394 (1 << log2_band_prec_height);
395 prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
396
397 prec->nb_codeblocks_width =
398 ff_jpeg2000_ceildivpow2(prec->coord[0][1] -
399 prec->coord[0][0],
400 band->log2_cblk_width);
401 prec->nb_codeblocks_height =
402 ff_jpeg2000_ceildivpow2(prec->coord[1][1] -
403 prec->coord[1][0],
404 band->log2_cblk_height);
405
406 /* Tag trees initialization */
407 prec->cblkincl =
408 ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
409 prec->nb_codeblocks_height);
410 if (!prec->cblkincl)
411 return AVERROR(ENOMEM);
412
413 prec->zerobits =
414 ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
415 prec->nb_codeblocks_height);
416 if (!prec->zerobits)
417 return AVERROR(ENOMEM);
418
b44925ae
MN		 419 prec->cblk = av_mallocz_array(prec->nb_codeblocks_width *
420 prec->nb_codeblocks_height,
421 sizeof(*prec->cblk));
c81a7063
NB		 422 if (!prec->cblk)
423 return AVERROR(ENOMEM);
424 for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
425 Jpeg2000Cblk *cblk = prec->cblk + cblkno;
426 uint16_t Cx0, Cy0;
427
428 /* Compute coordinates of codeblocks */
429 /* Compute Cx0*/
430 Cx0 = (prec->coord[0][0] >> band->log2_cblk_width) << band->log2_cblk_width;
431 Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width);
432 cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
433
434 /* Compute Cy0*/
435 Cy0 = (prec->coord[1][0] >> band->log2_cblk_height) << band->log2_cblk_height;
436 Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height);
437 cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
438
439 /* Compute Cx1 */
440 cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
441 prec->coord[0][1]);
442
443 /* Compute Cy1 */
444 cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
445 prec->coord[1][1]);
4e11b155
MN		 446 /* Update code-blocks coordinates according sub-band position */
447 if ((bandno + !!reslevelno) & 1) {
448 cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -
449 comp->reslevel[reslevelno-1].coord[0][0];
450 cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -
451 comp->reslevel[reslevelno-1].coord[0][0];
452 }
453 if ((bandno + !!reslevelno) & 2) {
454 cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -
455 comp->reslevel[reslevelno-1].coord[1][0];
456 cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -
457 comp->reslevel[reslevelno-1].coord[1][0];
458 }
459
c81a7063
NB		 460 cblk->zero = 0;
461 cblk->lblock = 3;
462 cblk->length = 0;
463 cblk->lengthinc = 0;
464 cblk->npasses = 0;
465 }
466 }
467 }
468 }
469 return 0;
470}
471
472void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
473{
474 int reslevelno, bandno, precno;
475 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
476 Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
477
478 for (bandno = 0; bandno < reslevel->nbands; bandno++) {
479 Jpeg2000Band *band = reslevel->band + bandno;
480 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
481 Jpeg2000Prec *prec = band->prec + precno;
482 av_freep(&prec->zerobits);
483 av_freep(&prec->cblkincl);
484 av_freep(&prec->cblk);
485 }
486
487 av_freep(&band->prec);
488 }
489 av_freep(&reslevel->band);
490 }
491
492 ff_dwt_destroy(&comp->dwt);
493 av_freep(&comp->reslevel);
494 av_freep(&comp->data);
495}
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