0,0 → 1,791 |
/* |
* 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 cblk |
@param index |
@param cblksty |
@param first |
*/ |
static void t2_init_seg(opj_tcd_cblk_dec_t* cblk, int index, 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 |
@param pack_info Packet information |
@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] = (tile->packno % 65536) / 256; |
c[5] = (tile->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_enc_t* cblk = &prc->cblks.enc[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_enc_t* cblk = &prc->cblks.enc[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_enc_t* cblk = &prc->cblks.enc[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_enc_t* cblk = &prc->cblks.enc[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_cblk_dec_t* cblk, int index, int cblksty, int first) { |
opj_tcd_seg_t* seg; |
cblk->segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, (index + 1) * sizeof(opj_tcd_seg_t)); |
seg = &cblk->segs[index]; |
seg->data = NULL; |
seg->dataindex = 0; |
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_resolution_t* res = &tile->comps[compno].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_dec_t* cblk = &prc->cblks.dec[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, segno; |
opj_tcd_cblk_dec_t* cblk = &prc->cblks.dec[cblkno]; |
/* 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; |
segno = 0; |
if (!cblk->numsegs) { |
t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 1); |
} else { |
segno = cblk->numsegs - 1; |
if (cblk->segs[segno].numpasses == cblk->segs[segno].maxpasses) { |
++segno; |
t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 0); |
} |
} |
n = cblk->numnewpasses; |
|
do { |
cblk->segs[segno].numnewpasses = int_min(cblk->segs[segno].maxpasses - cblk->segs[segno].numpasses, n); |
cblk->segs[segno].newlen = bio_read(bio, cblk->numlenbits + int_floorlog2(cblk->segs[segno].numnewpasses)); |
n -= cblk->segs[segno].numnewpasses; |
if (n > 0) { |
++segno; |
t2_init_seg(cblk, segno, 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"); |
return -999; |
} 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_dec_t* cblk = &prc->cblks.dec[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 */ |
|
cblk->data = (unsigned char*) opj_realloc(cblk->data, (cblk->len + seg->newlen) * sizeof(unsigned char*)); |
memcpy(cblk->data + cblk->len, c, seg->newlen); |
if (seg->numpasses == 0) { |
seg->data = &cblk->data; |
seg->dataindex = 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, int cur_totnum_tp){ |
unsigned char *c = dest; |
int e = 0; |
int compno; |
opj_pi_iterator_t *pi = NULL; |
int poc; |
opj_image_t *image = t2->image; |
opj_cp_t *cp = t2->cp; |
opj_tcp_t *tcp = &cp->tcps[tileno]; |
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; |
if (pi_create_encode(pi, cp,tileno,poc,tpnum,tppos,t2_mode,cur_totnum_tp)) { |
opj_event_msg(t2->cinfo, EVT_ERROR, "Error initializing Packet Iterator\n"); |
pi_destroy(pi, cp, tileno); |
return -999; |
} |
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,cur_totnum_tp); |
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 | tcp->POC)&& 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 */ |
tile->packno++; |
} |
} |
} |
|
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; |
} |
if(e == -999) return -999; |
/* 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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