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openjpeg/libopenjpeg/t2.c

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/*
* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2007, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* 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 "opj_includes.h"
/** @defgroup T2 T2 - Implementation of a tier-2 coding */
/*@{*/
/** @name Local static functions */
/*@{*/
static void t2_putcommacode(opj_bio_t *bio, int n);
static int t2_getcommacode(opj_bio_t *bio);
/**
Variable length code for signalling delta Zil (truncation point)
@param bio Bit Input/Output component
@param n delta Zil
*/
static void t2_putnumpasses(opj_bio_t *bio, int n);
static int t2_getnumpasses(opj_bio_t *bio);
/**
Encode a packet of a tile to a destination buffer
@param tile Tile for which to write the packets
@param tcp Tile coding parameters
@param pi Packet identity
@param dest Destination buffer
@param len Length of the destination buffer
@param cstr_info Codestream information structure
@param tileno Number of the tile encoded
@return
*/
static int t2_encode_packet(opj_tcd_tile_t *tile, opj_tcp_t *tcp, opj_pi_iterator_t *pi, unsigned char *dest, int len, opj_codestream_info_t *cstr_info, int tileno);
/**
@param seg
@param cblksty
@param first
*/
static void t2_init_seg(opj_tcd_seg_t *seg, int cblksty, int first);
/**
Decode a packet of a tile from a source buffer
@param t2 T2 handle
@param src Source buffer
@param len Length of the source buffer
@param tile Tile for which to write the packets
@param tcp Tile coding parameters
@param pi Packet identity
@return
*/
static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile,
opj_tcp_t *tcp, opj_pi_iterator_t *pi, opj_packet_info_t *pack_info);
/*@}*/
/*@}*/
/* ----------------------------------------------------------------------- */
/* #define RESTART 0x04 */
static void t2_putcommacode(opj_bio_t *bio, int n) {
while (--n >= 0) {
bio_write(bio, 1, 1);
}
bio_write(bio, 0, 1);
}
static int t2_getcommacode(opj_bio_t *bio) {
int n;
for (n = 0; bio_read(bio, 1); n++) {
;
}
return n;
}
static void t2_putnumpasses(opj_bio_t *bio, int n) {
if (n == 1) {
bio_write(bio, 0, 1);
} else if (n == 2) {
bio_write(bio, 2, 2);
} else if (n <= 5) {
bio_write(bio, 0xc | (n - 3), 4);
} else if (n <= 36) {
bio_write(bio, 0x1e0 | (n - 6), 9);
} else if (n <= 164) {
bio_write(bio, 0xff80 | (n - 37), 16);
}
}
static int t2_getnumpasses(opj_bio_t *bio) {
int n;
if (!bio_read(bio, 1))
return 1;
if (!bio_read(bio, 1))
return 2;
if ((n = bio_read(bio, 2)) != 3)
return (3 + n);
if ((n = bio_read(bio, 5)) != 31)
return (6 + n);
return (37 + bio_read(bio, 7));
}
static int t2_encode_packet(opj_tcd_tile_t * tile, opj_tcp_t * tcp, opj_pi_iterator_t *pi, unsigned char *dest, int length, opj_codestream_info_t *cstr_info, int tileno) {
int bandno, cblkno;
unsigned char *c = dest;
int compno = pi->compno; /* component value */
int resno = pi->resno; /* resolution level value */
int precno = pi->precno; /* precinct value */
int layno = pi->layno; /* quality layer value */
opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
opj_tcd_resolution_t *res = &tilec->resolutions[resno];
opj_bio_t *bio = NULL; /* BIO component */
/* <SOP 0xff91> */
if (tcp->csty & J2K_CP_CSTY_SOP) {
c[0] = 255;
c[1] = 145;
c[2] = 0;
c[3] = 4;
c[4] = (cstr_info->packno % 65536) / 256;
c[5] = (cstr_info->packno % 65536) % 256;
c += 6;
}
/* </SOP> */
if (!layno) {
for (bandno = 0; bandno < res->numbands; bandno++) {
opj_tcd_band_t *band = &res->bands[bandno];
opj_tcd_precinct_t *prc = &band->precincts[precno];
tgt_reset(prc->incltree);
tgt_reset(prc->imsbtree);
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
cblk->numpasses = 0;
tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
}
}
}
bio = bio_create();
bio_init_enc(bio, c, length);
bio_write(bio, 1, 1); /* Empty header bit */
/* Writing Packet header */
for (bandno = 0; bandno < res->numbands; bandno++) {
opj_tcd_band_t *band = &res->bands[bandno];
opj_tcd_precinct_t *prc = &band->precincts[precno];
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
opj_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++) {
opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
opj_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(bio, prc->incltree, cblkno, layno + 1);
} else {
bio_write(bio, 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(bio, prc->imsbtree, cblkno, 999);
}
/* number of coding passes included */
t2_putnumpasses(bio, 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++) {
opj_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(bio, 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++) {
opj_tcd_pass_t *pass = &cblk->passes[passno];
nump++;
len += pass->len;
if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
bio_write(bio, len, cblk->numlenbits + int_floorlog2(nump));
len = 0;
nump = 0;
}
}
}
}
if (bio_flush(bio)) {
bio_destroy(bio);
return -999; /* modified to eliminate longjmp !! */
}
c += bio_numbytes(bio);
bio_destroy(bio);
/* <EPH 0xff92> */
if (tcp->csty & J2K_CP_CSTY_EPH) {
c[0] = 255;
c[1] = 146;
c += 2;
}
/* </EPH> */
/* << INDEX */
// End of packet header position. Currently only represents the distance to start of packet
// Will be updated later by incrementing with packet start value
if(cstr_info && cstr_info->index_write) {
opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
info_PK->end_ph_pos = (int)(c - dest);
}
/* INDEX >> */
/* Writing the packet body */
for (bandno = 0; bandno < res->numbands; bandno++) {
opj_tcd_band_t *band = &res->bands[bandno];
opj_tcd_precinct_t *prc = &band->precincts[precno];
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
opj_tcd_layer_t *layer = &cblk->layers[layno];
if (!layer->numpasses) {
continue;
}
if (c + layer->len > dest + length) {
return -999;
}
memcpy(c, layer->data, layer->len);
cblk->numpasses += layer->numpasses;
c += layer->len;
/* << INDEX */
if(cstr_info && cstr_info->index_write) {
opj_packet_info_t *info_PK = &cstr_info->tile[tileno].packet[cstr_info->packno];
info_PK->disto += layer->disto;
if (cstr_info->D_max < info_PK->disto) {
cstr_info->D_max = info_PK->disto;
}
}
/* INDEX >> */
}
}
return (c - dest);
}
static void t2_init_seg(opj_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;
}
}
static int t2_decode_packet(opj_t2_t* t2, unsigned char *src, int len, opj_tcd_tile_t *tile,
opj_tcp_t *tcp, opj_pi_iterator_t *pi, opj_packet_info_t *pack_info) {
int bandno, cblkno;
unsigned char *c = src;
opj_cp_t *cp = t2->cp;
int compno = pi->compno; /* component value */
int resno = pi->resno; /* resolution level value */
int precno = pi->precno; /* precinct value */
int layno = pi->layno; /* quality layer value */
opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
opj_tcd_resolution_t *res = &tilec->resolutions[resno];
unsigned char *hd = NULL;
int present;
opj_bio_t *bio = NULL; /* BIO component */
if (layno == 0) {
for (bandno = 0; bandno < res->numbands; bandno++) {
opj_tcd_band_t *band = &res->bands[bandno];
opj_tcd_precinct_t *prc = &band->precincts[precno];
if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
tgt_reset(prc->incltree);
tgt_reset(prc->imsbtree);
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
cblk->numsegs = 0;
}
}
}
/* SOP markers */
if (tcp->csty & J2K_CP_CSTY_SOP) {
if ((*c) != 0xff || (*(c + 1) != 0x91)) {
opj_event_msg(t2->cinfo, EVT_WARNING, "Expected SOP marker\n");
} else {
c += 6;
}
/** TODO : check the Nsop value */
}
/*
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: Return to codestream for decoding
*/
bio = bio_create();
if (cp->ppm == 1) { /* PPM */
hd = cp->ppm_data;
bio_init_dec(bio, hd, cp->ppm_len);
} else if (tcp->ppt == 1) { /* PPT */
hd = tcp->ppt_data;
bio_init_dec(bio, hd, tcp->ppt_len);
} else { /* Normal Case */
hd = c;
bio_init_dec(bio, hd, src+len-hd);
}
present = bio_read(bio, 1);
if (!present) {
bio_inalign(bio);
hd += bio_numbytes(bio);
bio_destroy(bio);
/* EPH markers */
if (tcp->csty & J2K_CP_CSTY_EPH) {
if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
printf("Error : expected EPH marker\n");
} else {
hd += 2;
}
}
/* << INDEX */
// End of packet header position. Currently only represents the distance to start of packet
// Will be updated later by incrementing with packet start value
if(pack_info) {
pack_info->end_ph_pos = (int)(c - src);
}
/* INDEX >> */
if (cp->ppm == 1) { /* PPM case */
cp->ppm_len += cp->ppm_data-hd;
cp->ppm_data = hd;
return (c - src);
}
if (tcp->ppt == 1) { /* PPT case */
tcp->ppt_len+=tcp->ppt_data-hd;
tcp->ppt_data = hd;
return (c - src);
}
return (hd - src);
}
for (bandno = 0; bandno < res->numbands; bandno++) {
opj_tcd_band_t *band = &res->bands[bandno];
opj_tcd_precinct_t *prc = &band->precincts[precno];
if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
int included, increment, n;
opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
opj_tcd_seg_t *seg = NULL;
/* if cblk not yet included before --> inclusion tagtree */
if (!cblk->numsegs) {
included = tgt_decode(bio, prc->incltree, cblkno, layno + 1);
/* else one bit */
} else {
included = bio_read(bio, 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(bio, prc->imsbtree, cblkno, i); i++) {
;
}
numimsbs = i - 1;
cblk->numbps = band->numbps - numimsbs;
cblk->numlenbits = 3;
}
/* number of coding passes */
cblk->numnewpasses = t2_getnumpasses(bio);
increment = t2_getcommacode(bio);
/* 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(bio, 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(bio)) {
bio_destroy(bio);
return -999;
}
hd += bio_numbytes(bio);
bio_destroy(bio);
/* EPH markers */
if (tcp->csty & J2K_CP_CSTY_EPH) {
if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
opj_event_msg(t2->cinfo, EVT_ERROR, "Expected EPH marker\n");
} else {
hd += 2;
}
}
/* << INDEX */
// End of packet header position. Currently only represents the distance to start of packet
// Will be updated later by incrementing with packet start value
if(pack_info) {
pack_info->end_ph_pos = (int)(hd - src);
}
/* INDEX >> */
if (cp->ppm==1) {
cp->ppm_len+=cp->ppm_data-hd;
cp->ppm_data = hd;
} else if (tcp->ppt == 1) {
tcp->ppt_len+=tcp->ppt_data-hd;
tcp->ppt_data = hd;
} else {
c=hd;
}
for (bandno = 0; bandno < res->numbands; bandno++) {
opj_tcd_band_t *band = &res->bands[bandno];
opj_tcd_precinct_t *prc = &band->precincts[precno];
if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
opj_tcd_seg_t *seg = NULL;
if (!cblk->numnewpasses)
continue;
if (!cblk->numsegs) {
seg = &cblk->segs[0];
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;
}
#ifdef USE_JPWL
/* we need here a j2k handle to verify if making a check to
the validity of cblocks parameters is selected from user (-W) */
/* let's check that we are not exceeding */
if ((cblk->len + seg->newlen) > 8192) {
opj_event_msg(t2->cinfo, EVT_WARNING,
"JPWL: segment too long (%d) for codeblock %d (p=%d, b=%d, r=%d, c=%d)\n",
seg->newlen, cblkno, precno, bandno, resno, compno);
if (!JPWL_ASSUME) {
opj_event_msg(t2->cinfo, EVT_ERROR, "JPWL: giving up\n");
return -999;
}
seg->newlen = 8192 - cblk->len;
opj_event_msg(t2->cinfo, EVT_WARNING, " - truncating segment to %d\n", seg->newlen);
break;
};
#endif /* USE_JPWL */
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);
}
/* ----------------------------------------------------------------------- */
int t2_encode_packets(opj_t2_t* t2,int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_codestream_info_t *cstr_info,int tpnum, int tppos,int pino, J2K_T2_MODE t2_mode){
unsigned char *c = dest;
int e = 0;
int compno;
int comp_len = 0;
opj_pi_iterator_t *pi = NULL;
int poc;
opj_image_t *image = t2->image;
opj_cp_t *cp = t2->cp;
int pocno = cp->cinema == CINEMA4K_24? 2: 1;
int maxcomp = cp->max_comp_size > 0 ? image->numcomps : 1;
pi = pi_initialise_encode(image, cp, tileno, t2_mode);
if(!pi) {
/* TODO: throw an error */
return -999;
}
if(t2_mode == THRESH_CALC ){ /* Calculating threshold */
for(compno = 0; compno < maxcomp; compno++ ){
for(poc = 0; poc < pocno ; poc++){
int comp_len = 0;
int tpnum = compno;
pi_create_encode(pi, cp,tileno,poc,tpnum,tppos,t2_mode);
while (pi_next(&pi[poc])) {
if (pi[poc].layno < maxlayers) {
e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[poc], c, dest + len - c, cstr_info, tileno);
comp_len = comp_len + e;
if (e == -999) {
break;
} else {
c += e;
}
}
}
if (e == -999) break;
if (cp->max_comp_size){
if (comp_len > cp->max_comp_size){
e = -999;
break;
}
}
}
if (e == -999) break;
}
}else{ /* t2_mode == FINAL_PASS */
pi_create_encode(pi, cp,tileno,pino,tpnum,tppos,t2_mode);
while (pi_next(&pi[pino])) {
if (pi[pino].layno < maxlayers) {
e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[pino], c, dest + len - c, cstr_info, tileno);
if (e == -999) {
break;
} else {
c += e;
}
/* INDEX >> */
if(cstr_info) {
if(cstr_info->index_write) {
opj_tile_info_t *info_TL = &cstr_info->tile[tileno];
opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno];
if (!cstr_info->packno) {
info_PK->start_pos = info_TL->end_header + 1;
} else {
info_PK->start_pos = (cp->tp_on && info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[cstr_info->packno - 1].end_pos + 1;
}
info_PK->end_pos = info_PK->start_pos + e - 1;
info_PK->end_ph_pos += info_PK->start_pos - 1; // End of packet header which now only represents the distance
// to start of packet is incremented by value of start of packet
}
cstr_info->packno++;
}
/* << INDEX */
}
}
}
pi_destroy(pi, cp, tileno);
if (e == -999) {
return e;
}
return (c - dest);
}
int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile, opj_codestream_info_t *cstr_info) {
unsigned char *c = src;
opj_pi_iterator_t *pi;
int pino, e = 0;
int n = 0, curtp = 0;
int tp_start_packno;
opj_image_t *image = t2->image;
opj_cp_t *cp = t2->cp;
/* create a packet iterator */
pi = pi_create_decode(image, cp, tileno);
if(!pi) {
/* TODO: throw an error */
return -999;
}
tp_start_packno = 0;
for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) {
while (pi_next(&pi[pino])) {
if ((cp->layer==0) || (cp->layer>=((pi[pino].layno)+1))) {
opj_packet_info_t *pack_info;
if (cstr_info)
pack_info = &cstr_info->tile[tileno].packet[cstr_info->packno];
else
pack_info = NULL;
e = t2_decode_packet(t2, c, src + len - c, tile, &cp->tcps[tileno], &pi[pino], pack_info);
} else {
e = 0;
}
/* progression in resolution */
image->comps[pi[pino].compno].resno_decoded =
(e > 0) ?
int_max(pi[pino].resno, image->comps[pi[pino].compno].resno_decoded)
: image->comps[pi[pino].compno].resno_decoded;
n++;
/* INDEX >> */
if(cstr_info) {
opj_tile_info_t *info_TL = &cstr_info->tile[tileno];
opj_packet_info_t *info_PK = &info_TL->packet[cstr_info->packno];
if (!cstr_info->packno) {
info_PK->start_pos = info_TL->end_header + 1;
} else if (info_TL->packet[cstr_info->packno-1].end_pos >= (int)cstr_info->tile[tileno].tp[curtp].tp_end_pos){ // New tile part
info_TL->tp[curtp].tp_numpacks = cstr_info->packno - tp_start_packno; // Number of packets in previous tile-part
tp_start_packno = cstr_info->packno;
curtp++;
info_PK->start_pos = cstr_info->tile[tileno].tp[curtp].tp_end_header+1;
} else {
info_PK->start_pos = (cp->tp_on && info_PK->start_pos) ? info_PK->start_pos : info_TL->packet[cstr_info->packno - 1].end_pos + 1;
}
info_PK->end_pos = info_PK->start_pos + e - 1;
info_PK->end_ph_pos += info_PK->start_pos - 1; // End of packet header which now only represents the distance
// to start of packet is incremented by value of start of packet
cstr_info->packno++;
}
/* << INDEX */
if (e == -999) { /* ADD */
break;
} else {
c += e;
}
}
}
/* INDEX >> */
if(cstr_info) {
cstr_info->tile[tileno].tp[curtp].tp_numpacks = cstr_info->packno - tp_start_packno; // Number of packets in last tile-part
}
/* << INDEX */
/* don't forget to release pi */
pi_destroy(pi, cp, tileno);
if (e == -999) {
return e;
}
return (c - src);
}
/* ----------------------------------------------------------------------- */
opj_t2_t* t2_create(opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp) {
/* create the tcd structure */
opj_t2_t *t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
if(!t2) return NULL;
t2->cinfo = cinfo;
t2->image = image;
t2->cp = cp;
return t2;
}
void t2_destroy(opj_t2_t *t2) {
if(t2) {
opj_free(t2);
}
}
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