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openjpeg/libopenjpeg/t2.c

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/*
* Copyright (c) 2001-2002, David Janssens
* Copyright (c) 2002-2004, Yannick Verschueren
* Copyright (c) 2002-2004, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "t2.h"
#include "tcd.h"
#include "bio.h"
#include "j2k.h"
#include "pi.h"
#include "tgt.h"
#include "int.h"
#include "cio.h"
#include <stdio.h>
#include <setjmp.h>
#include <string.h>
#include <stdlib.h>
#define RESTART 0x04
extern jmp_buf j2k_error;
void t2_putcommacode(int n)
{
while (--n >= 0) {
bio_write(1, 1);
}
bio_write(0, 1);
}
int t2_getcommacode()
{
int n;
for (n = 0; bio_read(1); n++) {
}
return n;
}
/* <summary> */
/* Variable length code for signalling delta Zil (truncation point) */
/* <val> n : delta Zil */
/* <\summary> */
void t2_putnumpasses(int n)
{
if (n == 1) {
bio_write(0, 1);
} else if (n == 2) {
bio_write(2, 2);
} else if (n <= 5) {
bio_write(0xc | (n - 3), 4);
} else if (n <= 36) {
bio_write(0x1e0 | (n - 6), 9);
} else if (n <= 164) {
bio_write(0xff80 | (n - 37), 16);
}
}
int t2_getnumpasses()
{
int n;
if (!bio_read(1))
return 1;
if (!bio_read(1))
return 2;
if ((n = bio_read(2)) != 3)
return 3 + n;
if ((n = bio_read(5)) != 31)
return 6 + n;
return 37 + bio_read(7);
}
/*
* Encode a packet of a tile to a destination buffer
*
* Tile : the tile for which to write the packets
* tcp : the tile coding parameters
* compno : Identity of the packet --> component value
* resno : Identity of the packet --> resolution level value
* precno : Identity of the packet --> precinct value
* layno : Identity of the packet --> quality layer value
* dest : the destination buffer
* len : the length of the destination buffer
* info_IM : structure to create an index file
* tileno : number of the tile encoded
*/
int t2_encode_packet(tcd_tile_t * tile, j2k_tcp_t * tcp, int compno,
int resno, int precno, int layno, unsigned char *dest,
int len, info_image * info_IM, int tileno)
{
int bandno, cblkno;
unsigned char *sop = 0, *eph = 0;
tcd_tilecomp_t *tilec = &tile->comps[compno];
tcd_resolution_t *res = &tilec->resolutions[resno];
unsigned char *c = dest;
/* <SOP 0xff91> */
if (tcp->csty & J2K_CP_CSTY_SOP) {
sop = (unsigned char *) malloc(6 * sizeof(unsigned char));
sop[0] = 255;
sop[1] = 145;
sop[2] = 0;
sop[3] = 4;
sop[4] = (info_IM->num % 65536) / 256;
sop[5] = (info_IM->num % 65536) % 256;
memcpy(c, sop, 6);
free(sop);
c += 6;
}
/* </SOP> */
if (!layno) {
for (bandno = 0; bandno < res->numbands; bandno++) {
tcd_band_t *band = &res->bands[bandno];
tcd_precinct_t *prc = &band->precincts[precno];
tgt_reset(prc->incltree);
tgt_reset(prc->imsbtree);
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
tcd_cblk_t *cblk = &prc->cblks[cblkno];
cblk->numpasses = 0;
tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
}
}
}
bio_init_enc(c, len);
bio_write(1, 1); /* Empty header bit */
/* Writing Packet header */
for (bandno = 0; bandno < res->numbands; bandno++) {
tcd_band_t *band = &res->bands[bandno];
tcd_precinct_t *prc = &band->precincts[precno];
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
tcd_cblk_t *cblk = &prc->cblks[cblkno];
tcd_layer_t *layer = &cblk->layers[layno];
if (!cblk->numpasses && layer->numpasses) {
tgt_setvalue(prc->incltree, cblkno, layno);
}
}
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
tcd_cblk_t *cblk = &prc->cblks[cblkno];
tcd_layer_t *layer = &cblk->layers[layno];
int increment = 0;
int nump = 0;
int len = 0, passno;
/* cblk inclusion bits */
if (!cblk->numpasses) {
tgt_encode(prc->incltree, cblkno, layno + 1);
} else {
bio_write(layer->numpasses != 0, 1);
}
/* if cblk not included, go to the next cblk */
if (!layer->numpasses) {
continue;
}
/* if first instance of cblk --> zero bit-planes information */
if (!cblk->numpasses) {
cblk->numlenbits = 3;
tgt_encode(prc->imsbtree, cblkno, 999);
}
/* number of coding passes included */
t2_putnumpasses(layer->numpasses);
/* computation of the increase of the length indicator and insertion in the header */
for (passno = cblk->numpasses;
passno < cblk->numpasses + layer->numpasses; passno++) {
tcd_pass_t *pass = &cblk->passes[passno];
nump++;
len += pass->len;
if (pass->term
|| passno == (cblk->numpasses + layer->numpasses) - 1) {
increment =
int_max(increment,
int_floorlog2(len) + 1 -
(cblk->numlenbits + int_floorlog2(nump)));
len = 0;
nump = 0;
}
}
t2_putcommacode(increment);
/* computation of the new Length indicator */
cblk->numlenbits += increment;
/* insertion of the codeword segment length */
for (passno = cblk->numpasses;
passno < cblk->numpasses + layer->numpasses; passno++) {
tcd_pass_t *pass = &cblk->passes[passno];
nump++;
len += pass->len;
if (pass->term
|| passno == (cblk->numpasses + layer->numpasses) - 1) {
bio_write(len, cblk->numlenbits + int_floorlog2(nump));
len = 0;
nump = 0;
}
}
}
}
if (bio_flush())
return -999; /* modified to eliminate longjmp !! */
c += bio_numbytes();
/* <EPH 0xff92> */
if (tcp->csty & J2K_CP_CSTY_EPH) {
eph = (unsigned char *) malloc(2 * sizeof(unsigned char));
eph[0] = 255;
eph[1] = 146;
memcpy(c, eph, 2);
free(eph);
c += 2;
}
/* </EPH> */
/* Writing the packet body */
for (bandno = 0; bandno < res->numbands; bandno++) {
tcd_band_t *band = &res->bands[bandno];
tcd_precinct_t *prc = &band->precincts[precno];
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
tcd_cblk_t *cblk = &prc->cblks[cblkno];
tcd_layer_t *layer = &cblk->layers[layno];
if (!layer->numpasses) {
continue;
}
if (c + layer->len > dest + len) {
return -999;
}
memcpy(c, layer->data, layer->len);
cblk->numpasses += layer->numpasses;
c += layer->len;
/* ADD for index Cfr. Marcela --> delta disto by packet */
if (info_IM->index_write && info_IM->index_on) {
info_tile *info_TL = &info_IM->tile[tileno];
info_packet *info_PK = &info_TL->packet[info_IM->num];
info_PK->disto += layer->disto;
if (info_IM->D_max < info_PK->disto)
info_IM->D_max = info_PK->disto;
} /* </ADD> */
}
}
return c - dest;
}
void t2_init_seg(tcd_seg_t * seg, int cblksty, int first)
{
seg->numpasses = 0;
seg->len = 0;
if (cblksty & J2K_CCP_CBLKSTY_TERMALL)
seg->maxpasses = 1;
else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
if (first)
seg->maxpasses = 10;
else
seg->maxpasses = (((seg - 1)->maxpasses == 1)
|| ((seg - 1)->maxpasses == 10)) ? 2 : 1;
} else
seg->maxpasses = 109;
}
/*
* Decode a packet of a tile from a source buffer
*
* src : the source buffer
* len : the length of the source buffer
* tile : the tile for which to write the packets
* cp : the image coding parameters
* tcp : the tile coding parameters
* compno : Identity of the packet --> component value
* resno : Identity of the packet --> resolution level value
* precno : Identity of the packet --> precinct value
* layno : Identity of the packet --> quality layer value
*/
int t2_decode_packet(unsigned char *src, int len, tcd_tile_t * tile,
j2k_cp_t * cp, j2k_tcp_t * tcp, int compno, int resno,
int precno, int layno)
{
int bandno, cblkno;
tcd_tilecomp_t *tilec = &tile->comps[compno];
tcd_resolution_t *res = &tilec->resolutions[resno];
unsigned char *c = src;
int present;
if (layno == 0) {
for (bandno = 0; bandno < res->numbands; bandno++) {
tcd_band_t *band = &res->bands[bandno];
tcd_precinct_t *prc = &band->precincts[precno];
tgt_reset(prc->incltree);
tgt_reset(prc->imsbtree);
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
tcd_cblk_t *cblk = &prc->cblks[cblkno];
cblk->numsegs = 0;
}
}
}
/* When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
This part deal with this caracteristic
step 1: Read packet header in the saved structure
step 2: (futher) return to codestream for decoding */
if (cp->ppm == 1) { /* PPM */
c = cp->ppm_data;
bio_init_dec(c, 1000);
} else {
if (tcp->ppt == 1) { /* PPT */
c = tcp->ppt_data;
bio_init_dec(c, 1000);
} else { /* Normal Case */
if (tcp->csty & J2K_CP_CSTY_SOP) {
if ((*c) != 255 || (*(c + 1) != 145)) {
printf("Error : expected SOP marker [1]!!!\n");
}
c += 6;
}
bio_init_dec(c, src + len - c);
}
}
present = bio_read(1);
if (!present) {
bio_inalign();
/* Normal case */
c += bio_numbytes();
if (tcp->csty & J2K_CP_CSTY_EPH) {
if ((*c) != 255 || (*(c + 1) != 146)) {
printf("Error : expected EPH marker [1]!!!\n");
}
c += 2;
}
/* PPT and PPM dealing */
if (cp->ppm == 1) { /* PPM */
cp->ppm_data = c;
return 0;
}
if (tcp->ppt == 1) { /* PPT */
tcp->ppt_data = c;
return 0;
}
return c - src;
}
for (bandno = 0; bandno < res->numbands; bandno++) {
tcd_band_t *band = &res->bands[bandno];
tcd_precinct_t *prc = &band->precincts[precno];
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
int included, increment, n;
tcd_cblk_t *cblk = &prc->cblks[cblkno];
tcd_seg_t *seg;
/* if cblk not yet included before --> inclusion tagtree */
if (!cblk->numsegs) {
included = tgt_decode(prc->incltree, cblkno, layno + 1);
/* else one bit */
} else {
included = bio_read(1);
}
/* if cblk not included */
if (!included) {
cblk->numnewpasses = 0;
continue;
}
/* if cblk not yet included --> zero-bitplane tagtree */
if (!cblk->numsegs) {
int i, numimsbs;
for (i = 0; !tgt_decode(prc->imsbtree, cblkno, i); i++) {
}
numimsbs = i - 1;
cblk->numbps = band->numbps - numimsbs;
cblk->numlenbits = 3;
}
/* number of coding passes */
cblk->numnewpasses = t2_getnumpasses();
increment = t2_getcommacode();
/* length indicator increment */
cblk->numlenbits += increment;
if (!cblk->numsegs) {
seg = &cblk->segs[0];
t2_init_seg(seg, tcp->tccps[compno].cblksty, 1);
} else {
seg = &cblk->segs[cblk->numsegs - 1];
if (seg->numpasses == seg->maxpasses) {
t2_init_seg(++seg, tcp->tccps[compno].cblksty, 0);
}
}
n = cblk->numnewpasses;
do {
seg->numnewpasses = int_min(seg->maxpasses - seg->numpasses, n);
seg->newlen =
bio_read(cblk->numlenbits + int_floorlog2(seg->numnewpasses));
n -= seg->numnewpasses;
if (n > 0) {
t2_init_seg(++seg, tcp->tccps[compno].cblksty, 0);
}
} while (n > 0);
}
}
if (bio_inalign())
return -999;
c += bio_numbytes();
if (tcp->csty & J2K_CP_CSTY_EPH) { /* EPH marker */
if ((*c) != 255 || (*(c + 1) != 146)) {
printf("Error : expected EPH marker [2]!!!\n");
}
c += 2;
}
/* PPT Step 2 : see above for details */
if (cp->ppm == 1) {
cp->ppm_data = c; /* Update pointer */
c = src;
if (tcp->csty & J2K_CP_CSTY_SOP) {
if ((*c) != 255 || (*(c + 1) != 145)) {
printf("Error : expected SOP marker [2] !!!\n");
}
c += 6;
}
bio_init_dec(c, src + len - c);
} else {
if (tcp->ppt == 1) {
tcp->ppt_data = c; /* Update pointer */
c = src;
if (tcp->csty & J2K_CP_CSTY_SOP) { /* SOP marker */
if ((*c) != 255 || (*(c + 1) != 145)) {
printf("Error : expected SOP marker [2] !!!\n");
}
c += 6;
}
bio_init_dec(c, src + len - c);
}
}
for (bandno = 0; bandno < res->numbands; bandno++) {
tcd_band_t *band = &res->bands[bandno];
tcd_precinct_t *prc = &band->precincts[precno];
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
tcd_cblk_t *cblk = &prc->cblks[cblkno];
tcd_seg_t *seg;
if (!cblk->numnewpasses)
continue;
if (!cblk->numsegs) {
seg = &cblk->segs[cblk->numsegs++];
cblk->len = 0;
} else {
seg = &cblk->segs[cblk->numsegs - 1];
if (seg->numpasses == seg->maxpasses) {
seg++;
cblk->numsegs++;
}
}
do {
if (c + seg->newlen > src + len) {
return -999;
}
memcpy(cblk->data + cblk->len, c, seg->newlen);
if (seg->numpasses == 0) {
seg->data = cblk->data + cblk->len;
}
c += seg->newlen;
cblk->len += seg->newlen;
seg->len += seg->newlen;
seg->numpasses += seg->numnewpasses;
cblk->numnewpasses -= seg->numnewpasses;
if (cblk->numnewpasses > 0) {
seg++;
cblk->numsegs++;
}
} while (cblk->numnewpasses > 0);
}
}
return c - src;
}
/*
* Encode the packets of a tile to a destination buffer
*
* img : the source image
* cp : the image coding parameters
* tileno : number of the tile encoded
* tile : the tile for which to write the packets
* maxlayers : maximum number of layers
* dest : the destination buffer
* len : the length of the destination buffer
* info_IM : structure to create an index file
*/
int t2_encode_packets(j2k_image_t * img, j2k_cp_t * cp, int tileno,
tcd_tile_t * tile, int maxlayers,
unsigned char *dest, int len, info_image * info_IM)
{
unsigned char *c = dest;
int e = 0;
pi_iterator_t *pi;
int pino, compno;
pi = pi_create(img, cp, tileno);
for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) {
while (pi_next(&pi[pino])) {
if (pi[pino].layno < maxlayers) {
e = t2_encode_packet(tile, &cp->tcps[tileno],
pi[pino].compno, pi[pino].resno,
pi[pino].precno, pi[pino].layno, c,
dest + len - c, info_IM, tileno);
if (e == -999) {
break;
} else
c += e;
/* INDEX >> */
if (info_IM->index_write && info_IM->index_on) {
info_tile *info_TL = &info_IM->tile[tileno];
info_packet *info_PK = &info_TL->packet[info_IM->num];
if (!info_IM->num) {
info_PK->start_pos = info_TL->end_header + 1;
} else {
info_PK->start_pos =
info_TL->packet[info_IM->num - 1].end_pos + 1;
}
info_PK->end_pos = info_PK->start_pos + e - 1;
}
/* << INDEX */
if ((info_IM->index_write
&& cp->tcps[tileno].csty & J2K_CP_CSTY_SOP)
|| (info_IM->index_write && info_IM->index_on)) {
info_IM->num++;
}
}
}
/* FREE space memory taken by pi */
for (compno = 0; compno < pi[pino].numcomps; compno++) {
free(pi[pino].comps[compno].resolutions);
}
free(pi[pino].comps);
}
free(pi[0].include);
free(pi);
if (e == -999)
return e;
else
return c - dest;
}
/*
* Decode the packets of a tile from a source buffer
*
* src: the source buffer
* len: length of the source buffer
* img: destination image
* cp: image coding parameters
* tileno: number that identifies the tile for which to decode the packets
* tile: tile for which to decode the packets
*/
int t2_decode_packets(unsigned char *src, int len, j2k_image_t * img,
j2k_cp_t * cp, int tileno, tcd_tile_t * tile)
{
unsigned char *c = src;
pi_iterator_t *pi;
int pino, compno, e = 0;
int n = 0;
pi = pi_create(img, cp, tileno);
for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) {
while (pi_next(&pi[pino])) {
e = t2_decode_packet(c, src + len - c, tile, cp,
&cp->tcps[tileno], pi[pino].compno,
pi[pino].resno, pi[pino].precno,
pi[pino].layno);
/* progression in resolution */
img->comps[pi[pino].compno].resno_decoded =
e > 0 ? int_max(pi[pino].resno,
img->comps[pi[pino].compno].
resno_decoded) : img->comps[pi[pino].
compno].resno_decoded;
n++;
if (e == -999) { /* ADD */
break;
} else
c += e;
}
/* FREE space memory taken by pi */
for (compno = 0; compno < pi[pino].numcomps; compno++) {
free(pi[pino].comps[compno].resolutions);
}
free(pi[pino].comps);
}
free(pi[0].include);
free(pi);
if (e == -999)
return e;
else
return c - src;
}
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