2 * JPEG2000 image decoder
3 * Copyright (c) 2007 Kamil Nowosad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * JPEG2000 image decoder
25 * @author Kamil Nowosad
31 #include "bytestream.h"
33 #include "libavutil/common.h"
35 #define JP2_SIG_TYPE 0x6A502020
36 #define JP2_SIG_VALUE 0x0D0A870A
37 #define JP2_CODESTREAM 0x6A703263
44 uint8_t properties[4];
45 J2kCodingStyle codsty[4];
46 J2kQuantStyle qntsty[4];
50 AVCodecContext *avctx;
54 int width, height; ///< image width and height
55 int image_offset_x, image_offset_y;
56 int tile_offset_x, tile_offset_y;
57 uint8_t cbps[4]; ///< bits per sample in particular components
58 uint8_t sgnd[4]; ///< if a component is signed
59 uint8_t properties[4];
63 int tile_width, tile_height; ///< tile size
64 int numXtiles, numYtiles;
67 J2kCodingStyle codsty[4];
68 J2kQuantStyle qntsty[4];
77 static int get_bits(J2kDecoderContext *s, int n)
83 if (s->bit_index == 0) {
84 s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);
87 res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;
92 static void j2k_flush(J2kDecoderContext *s)
94 if (bytestream2_get_byte(&s->g) == 0xff)
95 bytestream2_skip(&s->g, 1);
99 void printcomp(J2kComponent *comp)
102 for (i = 0; i < comp->y1 - comp->y0; i++)
103 ff_j2k_printv(comp->data + i * (comp->x1 - comp->x0), comp->x1 - comp->x0);
106 static void nspaces(FILE *fd, int n)
108 while(n--) putc(' ', fd);
111 static void dump(J2kDecoderContext *s, FILE *fd)
113 int tileno, compno, reslevelno, bandno, precno;
114 fprintf(fd, "XSiz = %d, YSiz = %d, tile_width = %d, tile_height = %d\n"
115 "numXtiles = %d, numYtiles = %d, ncomponents = %d\n"
117 s->width, s->height, s->tile_width, s->tile_height,
118 s->numXtiles, s->numYtiles, s->ncomponents);
119 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
120 J2kTile *tile = s->tile + tileno;
122 fprintf(fd, "tile %d:\n", tileno);
123 for(compno = 0; compno < s->ncomponents; compno++){
124 J2kComponent *comp = tile->comp + compno;
126 fprintf(fd, "component %d:\n", compno);
128 fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d\n",
129 comp->x0, comp->x1, comp->y0, comp->y1);
130 for(reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
131 J2kResLevel *reslevel = comp->reslevel + reslevelno;
133 fprintf(fd, "reslevel %d:\n", reslevelno);
135 fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d, nbands = %d\n",
136 reslevel->x0, reslevel->x1, reslevel->y0,
137 reslevel->y1, reslevel->nbands);
138 for(bandno = 0; bandno < reslevel->nbands; bandno++){
139 J2kBand *band = reslevel->band + bandno;
141 fprintf(fd, "band %d:\n", bandno);
143 fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d,"
144 "codeblock_width = %d, codeblock_height = %d cblknx = %d cblkny = %d\n",
147 band->codeblock_width, band->codeblock_height,
148 band->cblknx, band->cblkny);
149 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
150 J2kPrec *prec = band->prec + precno;
152 fprintf(fd, "prec %d:\n", precno);
154 fprintf(fd, "xi0 = %d, xi1 = %d, yi0 = %d, yi1 = %d\n",
155 prec->xi0, prec->xi1, prec->yi0, prec->yi1);
164 /** decode the value stored in node */
165 static int tag_tree_decode(J2kDecoderContext *s, J2kTgtNode *node, int threshold)
167 J2kTgtNode *stack[30];
168 int sp = -1, curval = 0;
171 return AVERROR(EINVAL);
173 while(node && !node->vis){
181 curval = stack[sp]->val;
183 while(curval < threshold && sp >= 0){
184 if (curval < stack[sp]->val)
185 curval = stack[sp]->val;
186 while (curval < threshold){
188 if ((ret = get_bits(s, 1)) > 0){
196 stack[sp]->val = curval;
202 /* marker segments */
203 /** get sizes and offsets of image, tiles; number of components */
204 static int get_siz(J2kDecoderContext *s)
208 if (bytestream2_get_bytes_left(&s->g) < 36)
209 return AVERROR(EINVAL);
211 bytestream2_get_be16u(&s->g); // Rsiz (skipped)
212 s->width = bytestream2_get_be32u(&s->g); // width
213 s->height = bytestream2_get_be32u(&s->g); // height
214 s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz
215 s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz
217 s->tile_width = bytestream2_get_be32u(&s->g); // XTSiz
218 s->tile_height = bytestream2_get_be32u(&s->g); // YTSiz
219 s->tile_offset_x = bytestream2_get_be32u(&s->g); // XT0Siz
220 s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz
221 s->ncomponents = bytestream2_get_be16u(&s->g); // CSiz
223 if(s->ncomponents <= 0 || s->ncomponents > 4) {
224 av_log(s->avctx, AV_LOG_ERROR, "unsupported/invalid ncomponents: %d\n", s->ncomponents);
225 return AVERROR(EINVAL);
227 if(s->tile_width<=0 || s->tile_height<=0)
228 return AVERROR(EINVAL);
230 if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents)
231 return AVERROR(EINVAL);
233 for (i = 0; i < s->ncomponents; i++){ // Ssiz_i XRsiz_i, YRsiz_i
234 uint8_t x = bytestream2_get_byteu(&s->g);
235 s->cbps[i] = (x & 0x7f) + 1;
236 s->precision = FFMAX(s->cbps[i], s->precision);
237 s->sgnd[i] = !!(x & 0x80);
238 s->cdx[i] = bytestream2_get_byteu(&s->g);
239 s->cdy[i] = bytestream2_get_byteu(&s->g);
242 s->numXtiles = ff_j2k_ceildiv(s->width - s->tile_offset_x, s->tile_width);
243 s->numYtiles = ff_j2k_ceildiv(s->height - s->tile_offset_y, s->tile_height);
245 if(s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(J2kTile))
246 return AVERROR(EINVAL);
248 s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(J2kTile));
250 return AVERROR(ENOMEM);
252 for (i = 0; i < s->numXtiles * s->numYtiles; i++){
253 J2kTile *tile = s->tile + i;
255 tile->comp = av_mallocz(s->ncomponents * sizeof(J2kComponent));
257 return AVERROR(ENOMEM);
260 s->avctx->width = s->width - s->image_offset_x;
261 s->avctx->height = s->height - s->image_offset_y;
263 switch(s->ncomponents){
265 if (s->precision > 8) {
266 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
268 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
272 if (s->precision > 8) {
273 s->avctx->pix_fmt = AV_PIX_FMT_RGB48;
275 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
279 s->avctx->pix_fmt = AV_PIX_FMT_RGBA;
283 if (s->picture.data[0])
284 s->avctx->release_buffer(s->avctx, &s->picture);
286 if ((ret = s->avctx->get_buffer(s->avctx, &s->picture)) < 0)
289 s->picture.pict_type = AV_PICTURE_TYPE_I;
290 s->picture.key_frame = 1;
295 /** get common part for COD and COC segments */
296 static int get_cox(J2kDecoderContext *s, J2kCodingStyle *c)
298 if (bytestream2_get_bytes_left(&s->g) < 5)
299 return AVERROR(EINVAL);
300 c->nreslevels = bytestream2_get_byteu(&s->g) + 1; // num of resolution levels - 1
301 c->log2_cblk_width = bytestream2_get_byteu(&s->g) + 2; // cblk width
302 c->log2_cblk_height = bytestream2_get_byteu(&s->g) + 2; // cblk height
304 c->cblk_style = bytestream2_get_byteu(&s->g);
305 if (c->cblk_style != 0){ // cblk style
306 av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
308 c->transform = bytestream2_get_byteu(&s->g); // transformation
309 if (c->csty & J2K_CSTY_PREC) {
312 for (i = 0; i < c->nreslevels; i++)
313 bytestream2_get_byte(&s->g);
318 /** get coding parameters for a particular tile or whole image*/
319 static int get_cod(J2kDecoderContext *s, J2kCodingStyle *c, uint8_t *properties)
324 if (bytestream2_get_bytes_left(&s->g) < 5)
325 return AVERROR(EINVAL);
327 tmp.log2_prec_width =
328 tmp.log2_prec_height = 15;
330 tmp.csty = bytestream2_get_byteu(&s->g);
332 if (bytestream2_get_byteu(&s->g)){ // progression level
333 av_log(s->avctx, AV_LOG_ERROR, "only LRCP progression supported\n");
337 tmp.nlayers = bytestream2_get_be16u(&s->g);
338 tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
341 for (compno = 0; compno < s->ncomponents; compno++){
342 if (!(properties[compno] & HAD_COC))
343 memcpy(c + compno, &tmp, sizeof(J2kCodingStyle));
348 /** get coding parameters for a component in the whole image on a particular tile */
349 static int get_coc(J2kDecoderContext *s, J2kCodingStyle *c, uint8_t *properties)
353 if (bytestream2_get_bytes_left(&s->g) < 2)
354 return AVERROR(EINVAL);
356 compno = bytestream2_get_byteu(&s->g);
359 c->csty = bytestream2_get_byte(&s->g);
362 properties[compno] |= HAD_COC;
366 /** get common part for QCD and QCC segments */
367 static int get_qcx(J2kDecoderContext *s, int n, J2kQuantStyle *q)
371 if (bytestream2_get_bytes_left(&s->g) < 1)
372 return AVERROR(EINVAL);
374 x = bytestream2_get_byteu(&s->g); // Sqcd
376 q->nguardbits = x >> 5;
377 q->quantsty = x & 0x1f;
379 if (q->quantsty == J2K_QSTY_NONE){
381 if (bytestream2_get_bytes_left(&s->g) < n || 32*3 < n)
382 return AVERROR(EINVAL);
383 for (i = 0; i < n; i++)
384 q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
385 } else if (q->quantsty == J2K_QSTY_SI){
386 if (bytestream2_get_bytes_left(&s->g) < 2)
387 return AVERROR(EINVAL);
388 x = bytestream2_get_be16u(&s->g);
389 q->expn[0] = x >> 11;
390 q->mant[0] = x & 0x7ff;
391 for (i = 1; i < 32 * 3; i++){
392 int curexpn = FFMAX(0, q->expn[0] - (i-1)/3);
393 q->expn[i] = curexpn;
394 q->mant[i] = q->mant[0];
398 if (bytestream2_get_bytes_left(&s->g) < 2 * n || 32*3 < n)
399 return AVERROR(EINVAL);
400 for (i = 0; i < n; i++){
401 x = bytestream2_get_be16u(&s->g);
402 q->expn[i] = x >> 11;
403 q->mant[i] = x & 0x7ff;
409 /** get quantization parameters for a particular tile or a whole image */
410 static int get_qcd(J2kDecoderContext *s, int n, J2kQuantStyle *q, uint8_t *properties)
415 if (get_qcx(s, n, &tmp))
417 for (compno = 0; compno < s->ncomponents; compno++)
418 if (!(properties[compno] & HAD_QCC))
419 memcpy(q + compno, &tmp, sizeof(J2kQuantStyle));
423 /** get quantization parameters for a component in the whole image on in a particular tile */
424 static int get_qcc(J2kDecoderContext *s, int n, J2kQuantStyle *q, uint8_t *properties)
428 if (bytestream2_get_bytes_left(&s->g) < 1)
429 return AVERROR(EINVAL);
431 compno = bytestream2_get_byteu(&s->g);
432 properties[compno] |= HAD_QCC;
433 return get_qcx(s, n-1, q+compno);
436 /** get start of tile segment */
437 static uint8_t get_sot(J2kDecoderContext *s)
439 if (bytestream2_get_bytes_left(&s->g) < 8)
440 return AVERROR(EINVAL);
442 s->curtileno = bytestream2_get_be16u(&s->g); ///< Isot
443 if((unsigned)s->curtileno >= s->numXtiles * s->numYtiles){
445 return AVERROR(EINVAL);
448 bytestream2_skipu(&s->g, 4); ///< Psot (ignored)
450 if (!bytestream2_get_byteu(&s->g)){ ///< TPsot
451 J2kTile *tile = s->tile + s->curtileno;
454 memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(J2kCodingStyle));
455 memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(J2kQuantStyle));
457 bytestream2_get_byteu(&s->g); ///< TNsot
462 static int init_tile(J2kDecoderContext *s, int tileno)
465 tilex = tileno % s->numXtiles,
466 tiley = tileno / s->numXtiles;
467 J2kTile *tile = s->tile + tileno;
470 return AVERROR(ENOMEM);
471 for (compno = 0; compno < s->ncomponents; compno++){
472 J2kComponent *comp = tile->comp + compno;
473 J2kCodingStyle *codsty = tile->codsty + compno;
474 J2kQuantStyle *qntsty = tile->qntsty + compno;
475 int ret; // global bandno
477 comp->coord[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
478 comp->coord[0][1] = FFMIN((tilex+1)*s->tile_width + s->tile_offset_x, s->width);
479 comp->coord[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
480 comp->coord[1][1] = FFMIN((tiley+1)*s->tile_height + s->tile_offset_y, s->height);
482 if (ret = ff_j2k_init_component(comp, codsty, qntsty, s->cbps[compno], s->cdx[compno], s->cdy[compno]))
488 /** read the number of coding passes */
489 static int getnpasses(J2kDecoderContext *s)
496 if ((num = get_bits(s, 2)) != 3)
497 return num < 0 ? num : 3 + num;
498 if ((num = get_bits(s, 5)) != 31)
499 return num < 0 ? num : 6 + num;
500 num = get_bits(s, 7);
501 return num < 0 ? num : 37 + num;
504 static int getlblockinc(J2kDecoderContext *s)
507 while (ret = get_bits(s, 1)){
515 static int decode_packet(J2kDecoderContext *s, J2kCodingStyle *codsty, J2kResLevel *rlevel, int precno,
516 int layno, uint8_t *expn, int numgbits)
518 int bandno, cblkny, cblknx, cblkno, ret;
520 if (!(ret = get_bits(s, 1))){
526 for (bandno = 0; bandno < rlevel->nbands; bandno++){
527 J2kBand *band = rlevel->band + bandno;
528 J2kPrec *prec = band->prec + precno;
531 if (band->coord[0][0] == band->coord[0][1]
532 || band->coord[1][0] == band->coord[1][1])
535 for (cblkny = prec->yi0; cblkny < prec->yi1; cblkny++)
536 for(cblknx = prec->xi0, cblkno = cblkny * band->cblknx + cblknx; cblknx < prec->xi1; cblknx++, cblkno++, pos++){
537 J2kCblk *cblk = band->cblk + cblkno;
538 int incl, newpasses, llen;
541 incl = get_bits(s, 1);
543 incl = tag_tree_decode(s, prec->cblkincl + pos, layno+1) == layno;
550 cblk->nonzerobits = expn[bandno] + numgbits - 1 - tag_tree_decode(s, prec->zerobits + pos, 100);
551 if ((newpasses = getnpasses(s)) < 0)
553 if ((llen = getlblockinc(s)) < 0)
555 cblk->lblock += llen;
556 if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
558 cblk->lengthinc = ret;
559 cblk->npasses += newpasses;
564 if (codsty->csty & J2K_CSTY_EPH) {
565 if (bytestream2_peek_be16(&s->g) == J2K_EPH) {
566 bytestream2_skip(&s->g, 2);
568 av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
572 for (bandno = 0; bandno < rlevel->nbands; bandno++){
573 J2kBand *band = rlevel->band + bandno;
574 int yi, cblknw = band->prec[precno].xi1 - band->prec[precno].xi0;
575 for (yi = band->prec[precno].yi0; yi < band->prec[precno].yi1; yi++){
577 for (xi = band->prec[precno].xi0; xi < band->prec[precno].xi1; xi++){
578 J2kCblk *cblk = band->cblk + yi * cblknw + xi;
579 if (bytestream2_get_bytes_left(&s->g) < cblk->lengthinc)
580 return AVERROR(EINVAL);
581 bytestream2_get_bufferu(&s->g, cblk->data, cblk->lengthinc);
582 cblk->length += cblk->lengthinc;
590 static int decode_packets(J2kDecoderContext *s, J2kTile *tile)
592 int layno, reslevelno, compno, precno, ok_reslevel;
594 for (layno = 0; layno < tile->codsty[0].nlayers; layno++){
596 for (reslevelno = 0; ok_reslevel; reslevelno++){
598 for (compno = 0; compno < s->ncomponents; compno++){
599 J2kCodingStyle *codsty = tile->codsty + compno;
600 J2kQuantStyle *qntsty = tile->qntsty + compno;
601 if (reslevelno < codsty->nreslevels){
602 J2kResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
604 for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++){
605 if (decode_packet(s, codsty, rlevel, precno, layno, qntsty->expn +
606 (reslevelno ? 3*(reslevelno-1)+1 : 0), qntsty->nguardbits))
616 /* TIER-1 routines */
617 static void decode_sigpass(J2kT1Context *t1, int width, int height, int bpno, int bandno, int bpass_csty_symbol,
618 int vert_causal_ctx_csty_symbol)
620 int mask = 3 << (bpno - 1), y0, x, y;
622 for (y0 = 0; y0 < height; y0 += 4)
623 for (x = 0; x < width; x++)
624 for (y = y0; y < height && y < y0+4; y++){
625 if ((t1->flags[y+1][x+1] & J2K_T1_SIG_NB)
626 && !(t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS))){
627 int vert_causal_ctx_csty_loc_symbol = vert_causal_ctx_csty_symbol && (x == 3 && y == 3);
628 if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_j2k_getnbctxno(t1->flags[y+1][x+1], bandno,
629 vert_causal_ctx_csty_loc_symbol))){
630 int xorbit, ctxno = ff_j2k_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
631 if (bpass_csty_symbol)
632 t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
634 t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
637 ff_j2k_set_significant(t1, x, y, t1->data[y][x] < 0);
639 t1->flags[y+1][x+1] |= J2K_T1_VIS;
644 static void decode_refpass(J2kT1Context *t1, int width, int height, int bpno)
649 phalf = 1 << (bpno - 1);
652 for (y0 = 0; y0 < height; y0 += 4)
653 for (x = 0; x < width; x++)
654 for (y = y0; y < height && y < y0+4; y++){
655 if ((t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS)) == J2K_T1_SIG){
656 int ctxno = ff_j2k_getrefctxno(t1->flags[y+1][x+1]);
657 int r = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? phalf : nhalf;
658 t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
659 t1->flags[y+1][x+1] |= J2K_T1_REF;
664 static void decode_clnpass(J2kDecoderContext *s, J2kT1Context *t1, int width, int height,
665 int bpno, int bandno, int seg_symbols)
667 int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
669 for (y0 = 0; y0 < height; y0 += 4) {
670 for (x = 0; x < width; x++){
671 if (y0 + 3 < height && !(
672 (t1->flags[y0+1][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||
673 (t1->flags[y0+2][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||
674 (t1->flags[y0+3][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||
675 (t1->flags[y0+4][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)))){
676 if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
678 runlen = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
679 runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
686 for (y = y0 + runlen; y < y0 + 4 && y < height; y++){
688 if (!(t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS)))
689 dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_j2k_getnbctxno(t1->flags[y+1][x+1],
693 int xorbit, ctxno = ff_j2k_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
694 t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ? -mask : mask;
695 ff_j2k_set_significant(t1, x, y, t1->data[y][x] < 0);
698 t1->flags[y+1][x+1] &= ~J2K_T1_VIS;
704 val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
705 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
706 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
707 val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
709 av_log(s->avctx, AV_LOG_ERROR,"Segmentation symbol value incorrect\n");
714 static int decode_cblk(J2kDecoderContext *s, J2kCodingStyle *codsty, J2kT1Context *t1, J2kCblk *cblk,
715 int width, int height, int bandpos)
717 int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y, clnpass_cnt = 0;
718 int bpass_csty_symbol = J2K_CBLK_BYPASS & codsty->cblk_style;
719 int vert_causal_ctx_csty_symbol = J2K_CBLK_VSC & codsty->cblk_style;
721 for (y = 0; y < height+2; y++)
722 memset(t1->flags[y], 0, (width+2)*sizeof(int));
724 for (y = 0; y < height; y++)
725 memset(t1->data[y], 0, width*sizeof(int));
727 cblk->data[cblk->length] = 0xff;
728 cblk->data[cblk->length+1] = 0xff;
729 ff_mqc_initdec(&t1->mqc, cblk->data);
733 case 0: decode_sigpass(t1, width, height, bpno+1, bandpos,
734 bpass_csty_symbol && (clnpass_cnt >= 4), vert_causal_ctx_csty_symbol);
736 case 1: decode_refpass(t1, width, height, bpno+1);
737 if (bpass_csty_symbol && clnpass_cnt >= 4)
738 ff_mqc_initdec(&t1->mqc, cblk->data);
740 case 2: decode_clnpass(s, t1, width, height, bpno+1, bandpos,
741 codsty->cblk_style & J2K_CBLK_SEGSYM);
742 clnpass_cnt = clnpass_cnt + 1;
743 if (bpass_csty_symbol && clnpass_cnt >= 4)
744 ff_mqc_initdec(&t1->mqc, cblk->data);
757 static void mct_decode(J2kDecoderContext *s, J2kTile *tile)
759 int i, *src[3], i0, i1, i2, csize = 1;
761 for (i = 0; i < 3; i++)
762 src[i] = tile->comp[i].data;
764 for (i = 0; i < 2; i++)
765 csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
767 if (tile->codsty[0].transform == FF_DWT97){
768 for (i = 0; i < csize; i++){
769 i0 = *src[0] + (*src[2] * 46802 >> 16);
770 i1 = *src[0] - (*src[1] * 22553 + *src[2] * 46802 >> 16);
771 i2 = *src[0] + (116130 * *src[1] >> 16);
777 for (i = 0; i < csize; i++){
778 i1 = *src[0] - (*src[2] + *src[1] >> 2);
788 static int decode_tile(J2kDecoderContext *s, J2kTile *tile)
790 int compno, reslevelno, bandno;
795 for (compno = 0; compno < s->ncomponents; compno++){
796 J2kComponent *comp = tile->comp + compno;
797 J2kCodingStyle *codsty = tile->codsty + compno;
799 for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
800 J2kResLevel *rlevel = comp->reslevel + reslevelno;
801 for (bandno = 0; bandno < rlevel->nbands; bandno++){
802 J2kBand *band = rlevel->band + bandno;
803 int cblkx, cblky, cblkno=0, xx0, x0, xx1, y0, yy0, yy1, bandpos;
805 bandpos = bandno + (reslevelno > 0);
807 yy0 = bandno == 0 ? 0 : comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];
809 yy1 = FFMIN(ff_j2k_ceildiv(band->coord[1][0] + 1, band->codeblock_height) * band->codeblock_height,
810 band->coord[1][1]) - band->coord[1][0] + yy0;
812 if (band->coord[0][0] == band->coord[0][1] || band->coord[1][0] == band->coord[1][1])
815 for (cblky = 0; cblky < band->cblkny; cblky++){
816 if (reslevelno == 0 || bandno == 1)
819 xx0 = comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];
821 xx1 = FFMIN(ff_j2k_ceildiv(band->coord[0][0] + 1, band->codeblock_width) * band->codeblock_width,
822 band->coord[0][1]) - band->coord[0][0] + xx0;
824 for (cblkx = 0; cblkx < band->cblknx; cblkx++, cblkno++){
826 decode_cblk(s, codsty, &t1, band->cblk + cblkno, xx1 - xx0, yy1 - yy0, bandpos);
827 if (codsty->transform == FF_DWT53){
828 for (y = yy0; y < yy1; y+=s->cdy[compno]){
829 int *ptr = t1.data[y-yy0];
830 for (x = xx0; x < xx1; x+=s->cdx[compno]){
831 comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = *ptr++ >> 1;
835 for (y = yy0; y < yy1; y+=s->cdy[compno]){
836 int *ptr = t1.data[y-yy0];
837 for (x = xx0; x < xx1; x+=s->cdx[compno]){
838 int tmp = ((int64_t)*ptr++) * ((int64_t)band->stepsize) >> 13, tmp2;
839 tmp2 = FFABS(tmp>>1) + (tmp&1);
840 comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = tmp < 0 ? -tmp2 : tmp2;
845 xx1 = FFMIN(xx1 + band->codeblock_width, band->coord[0][1] - band->coord[0][0] + x0);
848 yy1 = FFMIN(yy1 + band->codeblock_height, band->coord[1][1] - band->coord[1][0] + y0);
852 ff_j2k_dwt_decode(&comp->dwt, comp->data);
853 src[compno] = comp->data;
855 if (tile->codsty[0].mct)
858 if (s->precision <= 8) {
859 for (compno = 0; compno < s->ncomponents; compno++){
860 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
861 line = s->picture.data[0] + y * s->picture.linesize[0];
862 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]){
865 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
866 dst = line + x * s->ncomponents + compno;
868 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) {
869 *src[compno] += 1 << (s->cbps[compno]-1);
870 if (*src[compno] < 0)
872 else if (*src[compno] >= (1 << s->cbps[compno]))
873 *src[compno] = (1 << s->cbps[compno]) - 1;
874 *dst = *src[compno]++;
875 dst += s->ncomponents;
877 line += s->picture.linesize[0];
881 for (compno = 0; compno < s->ncomponents; compno++) {
882 y = tile->comp[compno].coord[1][0] - s->image_offset_y;
883 line = s->picture.data[0] + y * s->picture.linesize[0];
884 for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
887 x = tile->comp[compno].coord[0][0] - s->image_offset_x;
888 dst = (uint16_t *)(line + (x * s->ncomponents + compno) * 2);
889 for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s-> cdx[compno]) {
892 val = *src[compno]++ << (16 - s->cbps[compno]);
894 val = av_clip(val, 0, (1 << 16) - 1);
896 dst += s->ncomponents;
898 line += s->picture.linesize[0];
905 static void cleanup(J2kDecoderContext *s)
908 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
909 for (compno = 0; compno < s->ncomponents; compno++){
910 J2kComponent *comp = s->tile[tileno].comp + compno;
911 J2kCodingStyle *codsty = s->tile[tileno].codsty + compno;
913 ff_j2k_cleanup(comp, codsty);
915 av_freep(&s->tile[tileno].comp);
920 static int decode_codestream(J2kDecoderContext *s)
922 J2kCodingStyle *codsty = s->codsty;
923 J2kQuantStyle *qntsty = s->qntsty;
924 uint8_t *properties = s->properties;
927 int oldpos, marker, len, ret = 0;
929 if (bytestream2_get_bytes_left(&s->g) < 2){
930 av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
934 marker = bytestream2_get_be16u(&s->g);
935 av_dlog(s->avctx, "marker 0x%.4X at pos 0x%x\n", marker, bytestream2_tell(&s->g) - 4);
936 oldpos = bytestream2_tell(&s->g);
938 if (marker == J2K_SOD){
939 J2kTile *tile = s->tile + s->curtileno;
940 if (ret = init_tile(s, s->curtileno)) {
941 av_log(s->avctx, AV_LOG_ERROR, "tile initialization failed\n");
944 if (ret = decode_packets(s, tile)) {
945 av_log(s->avctx, AV_LOG_ERROR, "packets decoding failed\n");
950 if (marker == J2K_EOC)
953 if (bytestream2_get_bytes_left(&s->g) < 2)
954 return AVERROR(EINVAL);
955 len = bytestream2_get_be16u(&s->g);
961 ret = get_coc(s, codsty, properties);
964 ret = get_cod(s, codsty, properties);
967 ret = get_qcc(s, len, qntsty, properties);
970 ret = get_qcd(s, len, qntsty, properties);
973 if (!(ret = get_sot(s))){
974 codsty = s->tile[s->curtileno].codsty;
975 qntsty = s->tile[s->curtileno].qntsty;
976 properties = s->tile[s->curtileno].properties;
980 // the comment is ignored
981 bytestream2_skip(&s->g, len - 2);
984 av_log(s->avctx, AV_LOG_ERROR, "unsupported marker 0x%.4X at pos 0x%x\n", marker, bytestream2_tell(&s->g) - 4);
985 bytestream2_skip(&s->g, len - 2);
988 if (bytestream2_tell(&s->g) - oldpos != len || ret){
989 av_log(s->avctx, AV_LOG_ERROR, "error during processing marker segment %.4x\n", marker);
990 return ret ? ret : -1;
996 static int jp2_find_codestream(J2kDecoderContext *s)
998 uint32_t atom_size, atom;
999 int found_codestream = 0, search_range = 10;
1001 while(!found_codestream && search_range && bytestream2_get_bytes_left(&s->g) >= 8) {
1002 atom_size = bytestream2_get_be32u(&s->g);
1003 atom = bytestream2_get_be32u(&s->g);
1004 if (atom == JP2_CODESTREAM) {
1005 found_codestream = 1;
1007 if (bytestream2_get_bytes_left(&s->g) < atom_size - 8)
1009 bytestream2_skipu(&s->g, atom_size - 8);
1014 if (found_codestream)
1019 static int decode_frame(AVCodecContext *avctx,
1020 void *data, int *data_size,
1023 J2kDecoderContext *s = avctx->priv_data;
1024 AVFrame *picture = data;
1027 bytestream2_init(&s->g, avpkt->data, avpkt->size);
1030 if (bytestream2_get_bytes_left(&s->g) < 2) {
1031 ret = AVERROR(EINVAL);
1035 // check if the image is in jp2 format
1036 if (bytestream2_get_bytes_left(&s->g) >= 12 &&
1037 (bytestream2_get_be32u(&s->g) == 12) &&
1038 (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
1039 (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
1040 if(!jp2_find_codestream(s)) {
1041 av_log(avctx, AV_LOG_ERROR, "couldn't find jpeg2k codestream atom\n");
1046 bytestream2_seek(&s->g, 0, SEEK_SET);
1049 if (bytestream2_get_be16u(&s->g) != J2K_SOC){
1050 av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
1054 if (ret = decode_codestream(s))
1057 for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
1058 if (ret = decode_tile(s, s->tile + tileno))
1063 *data_size = sizeof(AVPicture);
1064 *picture = s->picture;
1066 return bytestream2_tell(&s->g);
1073 static av_cold int j2kdec_init(AVCodecContext *avctx)
1075 J2kDecoderContext *s = avctx->priv_data;
1078 avcodec_get_frame_defaults((AVFrame*)&s->picture);
1079 avctx->coded_frame = (AVFrame*)&s->picture;
1081 ff_j2k_init_tier1_luts();
1086 static av_cold int decode_end(AVCodecContext *avctx)
1088 J2kDecoderContext *s = avctx->priv_data;
1090 if (s->picture.data[0])
1091 avctx->release_buffer(avctx, &s->picture);
1096 AVCodec ff_jpeg2000_decoder = {
1098 .type = AVMEDIA_TYPE_VIDEO,
1099 .id = AV_CODEC_ID_JPEG2000,
1100 .priv_data_size = sizeof(J2kDecoderContext),
1101 .init = j2kdec_init,
1102 .close = decode_end,
1103 .decode = decode_frame,
1104 .capabilities = CODEC_CAP_EXPERIMENTAL,
1105 .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),