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Diffstat (limited to 'openjpeg/src/lib/openmj2/t2.c')
| -rw-r--r-- | openjpeg/src/lib/openmj2/t2.c | 828 |
1 files changed, 828 insertions, 0 deletions
diff --git a/openjpeg/src/lib/openmj2/t2.c b/openjpeg/src/lib/openmj2/t2.c new file mode 100644 index 000000000..9762762fb --- /dev/null +++ b/openjpeg/src/lib/openmj2/t2.c @@ -0,0 +1,828 @@ +/* + * The copyright in this software is being made available under the 2-clauses + * BSD License, included below. This software may be subject to other third + * party and contributor rights, including patent rights, and no such rights + * are granted under this license. + * + * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium + * Copyright (c) 2002-2014, Professor Benoit Macq + * Copyright (c) 2001-2003, David Janssens + * Copyright (c) 2002-2003, Yannick Verschueren + * Copyright (c) 2003-2007, Francois-Olivier Devaux + * Copyright (c) 2003-2014, 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 opj_bool 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] = (unsigned char)((tile->packno % 65536) / 256); + c[5] = (unsigned char)((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 opj_bool t2_init_seg(opj_tcd_cblk_dec_t* cblk, int index, int cblksty, int first) { + opj_tcd_seg_t* seg; + opj_tcd_seg_t* segs; + segs = (opj_tcd_seg_t*) opj_realloc(cblk->segs, (index + 1) * sizeof(opj_tcd_seg_t)); + + if (segs == NULL) + { + return OPJ_FALSE; + } + cblk->segs = segs; + + 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; + } + + return OPJ_TRUE; +} + +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) { + if (!t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 1)) + { + opj_event_msg(t2->cinfo, EVT_ERROR, "Out of memory\n"); + bio_destroy(bio); + return -999; + } + } else { + segno = cblk->numsegs - 1; + if (cblk->segs[segno].numpasses == cblk->segs[segno].maxpasses) { + ++segno; + if (!t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 0)) + { + opj_event_msg(t2->cinfo, EVT_ERROR, "Out of memory\n"); + bio_destroy(bio); + return -999; + } + } + } + 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; + if (!t2_init_seg(cblk, segno, tcp->tccps[compno].cblksty, 0)) + { + opj_event_msg(t2->cinfo, EVT_ERROR, "Out of memory\n"); + bio_destroy(bio); + return -999; + } + } + } 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) + { + pi_destroy(pi, cp, tileno); + 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*/ + info_TL->tp[curtp].tp_start_pack = tp_start_packno; + 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*/ + cstr_info->tile[tileno].tp[curtp].tp_start_pack = tp_start_packno; + } + /* << 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); + } +} + + + + + |