2 * Copyright (c) 2001-2003, David Janssens
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3 * Copyright (c) 2002-2003, Yannick Verschueren
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4 * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
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5 * Copyright (c) 2005, Hervé Drolon, FreeImage Team
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6 * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
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7 * All rights reserved.
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9 * Redistribution and use in source and binary forms, with or without
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10 * modification, are permitted provided that the following conditions
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12 * 1. Redistributions of source code must retain the above copyright
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13 * notice, this list of conditions and the following disclaimer.
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14 * 2. Redistributions in binary form must reproduce the above copyright
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15 * notice, this list of conditions and the following disclaimer in the
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16 * documentation and/or other materials provided with the distribution.
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18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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28 * POSSIBILITY OF SUCH DAMAGE.
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31 #include "opj_includes.h"
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33 /** @defgroup T2 T2 - Implementation of a tier-2 coding */
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36 /** @name Local static functions */
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39 static void t2_putcommacode(opj_bio_t *bio, int n);
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40 static int t2_getcommacode(opj_bio_t *bio);
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42 Variable length code for signalling delta Zil (truncation point)
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43 @param bio Bit Input/Output component
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46 static void t2_putnumpasses(opj_bio_t *bio, int n);
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47 static int t2_getnumpasses(opj_bio_t *bio);
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49 Encode a packet of a tile to a destination buffer
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50 @param tile Tile for which to write the packets
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51 @param tcp Tile coding parameters
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52 @param pi Packet identity
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53 @param dest Destination buffer
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54 @param len Length of the destination buffer
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55 @param image_info Structure to create an index file
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56 @param tileno Number of the tile encoded
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59 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_image_info_t *image_info, int tileno);
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65 static void t2_init_seg(opj_tcd_seg_t *seg, int cblksty, int first);
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67 Decode a packet of a tile from a source buffer
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69 @param src Source buffer
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70 @param len Length of the source buffer
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71 @param tile Tile for which to write the packets
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72 @param tcp Tile coding parameters
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73 @param pi Packet identity
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76 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);
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82 /* ----------------------------------------------------------------------- */
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84 /* #define RESTART 0x04 */
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86 static void t2_putcommacode(opj_bio_t *bio, int n) {
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88 bio_write(bio, 1, 1);
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90 bio_write(bio, 0, 1);
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93 static int t2_getcommacode(opj_bio_t *bio) {
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95 for (n = 0; bio_read(bio, 1); n++) {
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101 static void t2_putnumpasses(opj_bio_t *bio, int n) {
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103 bio_write(bio, 0, 1);
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104 } else if (n == 2) {
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105 bio_write(bio, 2, 2);
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106 } else if (n <= 5) {
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107 bio_write(bio, 0xc | (n - 3), 4);
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108 } else if (n <= 36) {
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109 bio_write(bio, 0x1e0 | (n - 6), 9);
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110 } else if (n <= 164) {
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111 bio_write(bio, 0xff80 | (n - 37), 16);
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115 static int t2_getnumpasses(opj_bio_t *bio) {
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117 if (!bio_read(bio, 1))
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119 if (!bio_read(bio, 1))
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121 if ((n = bio_read(bio, 2)) != 3)
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123 if ((n = bio_read(bio, 5)) != 31)
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125 return (37 + bio_read(bio, 7));
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128 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_image_info_t * image_info, int tileno) {
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129 int bandno, cblkno;
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130 unsigned char *sop = 0, *eph = 0;
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131 unsigned char *c = dest;
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133 int compno = pi->compno; /* component value */
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134 int resno = pi->resno; /* resolution level value */
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135 int precno = pi->precno; /* precinct value */
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136 int layno = pi->layno; /* quality layer value */
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138 opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
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139 opj_tcd_resolution_t *res = &tilec->resolutions[resno];
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141 opj_bio_t *bio = NULL; /* BIO component */
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144 if (tcp->csty & J2K_CP_CSTY_SOP) {
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145 sop = (unsigned char *) opj_malloc(6 * sizeof(unsigned char));
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150 sop[4] = (image_info->num % 65536) / 256;
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151 sop[5] = (image_info->num % 65536) % 256;
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159 for (bandno = 0; bandno < res->numbands; bandno++) {
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160 opj_tcd_band_t *band = &res->bands[bandno];
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161 opj_tcd_precinct_t *prc = &band->precincts[precno];
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162 tgt_reset(prc->incltree);
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163 tgt_reset(prc->imsbtree);
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164 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
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165 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
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166 cblk->numpasses = 0;
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167 tgt_setvalue(prc->imsbtree, cblkno, band->numbps - cblk->numbps);
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172 bio = bio_create();
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173 bio_init_enc(bio, c, len);
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174 bio_write(bio, 1, 1); /* Empty header bit */
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176 /* Writing Packet header */
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177 for (bandno = 0; bandno < res->numbands; bandno++) {
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178 opj_tcd_band_t *band = &res->bands[bandno];
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179 opj_tcd_precinct_t *prc = &band->precincts[precno];
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180 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
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181 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
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182 opj_tcd_layer_t *layer = &cblk->layers[layno];
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183 if (!cblk->numpasses && layer->numpasses) {
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184 tgt_setvalue(prc->incltree, cblkno, layno);
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187 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
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188 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
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189 opj_tcd_layer_t *layer = &cblk->layers[layno];
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192 int len = 0, passno;
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193 /* cblk inclusion bits */
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194 if (!cblk->numpasses) {
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195 tgt_encode(bio, prc->incltree, cblkno, layno + 1);
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197 bio_write(bio, layer->numpasses != 0, 1);
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199 /* if cblk not included, go to the next cblk */
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200 if (!layer->numpasses) {
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203 /* if first instance of cblk --> zero bit-planes information */
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204 if (!cblk->numpasses) {
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205 cblk->numlenbits = 3;
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206 tgt_encode(bio, prc->imsbtree, cblkno, 999);
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208 /* number of coding passes included */
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209 t2_putnumpasses(bio, layer->numpasses);
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211 /* computation of the increase of the length indicator and insertion in the header */
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212 for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) {
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213 opj_tcd_pass_t *pass = &cblk->passes[passno];
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216 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
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217 increment = int_max(increment, int_floorlog2(len) + 1 - (cblk->numlenbits + int_floorlog2(nump)));
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222 t2_putcommacode(bio, increment);
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224 /* computation of the new Length indicator */
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225 cblk->numlenbits += increment;
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227 /* insertion of the codeword segment length */
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228 for (passno = cblk->numpasses; passno < cblk->numpasses + layer->numpasses; passno++) {
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229 opj_tcd_pass_t *pass = &cblk->passes[passno];
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232 if (pass->term || passno == (cblk->numpasses + layer->numpasses) - 1) {
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233 bio_write(bio, len, cblk->numlenbits + int_floorlog2(nump));
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241 if (bio_flush(bio)) {
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242 return -999; /* modified to eliminate longjmp !! */
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245 c += bio_numbytes(bio);
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250 if (tcp->csty & J2K_CP_CSTY_EPH) {
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251 eph = (unsigned char *) opj_malloc(2 * sizeof(unsigned char));
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260 /* Writing the packet body */
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262 for (bandno = 0; bandno < res->numbands; bandno++) {
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263 opj_tcd_band_t *band = &res->bands[bandno];
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264 opj_tcd_precinct_t *prc = &band->precincts[precno];
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265 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
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266 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
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267 opj_tcd_layer_t *layer = &cblk->layers[layno];
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268 if (!layer->numpasses) {
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271 if (c + layer->len > dest + len) {
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275 memcpy(c, layer->data, layer->len);
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276 cblk->numpasses += layer->numpasses;
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278 /* ADD for index Cfr. Marcela --> delta disto by packet */
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279 if(image_info && image_info->index_write && image_info->index_on) {
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280 opj_tile_info_t *info_TL = &image_info->tile[tileno];
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281 opj_packet_info_t *info_PK = &info_TL->packet[image_info->num];
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282 info_PK->disto += layer->disto;
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283 if (image_info->D_max < info_PK->disto) {
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284 image_info->D_max = info_PK->disto;
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294 static void t2_init_seg(opj_tcd_seg_t * seg, int cblksty, int first) {
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295 seg->numpasses = 0;
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297 if (cblksty & J2K_CCP_CBLKSTY_TERMALL) {
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298 seg->maxpasses = 1;
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300 else if (cblksty & J2K_CCP_CBLKSTY_LAZY) {
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302 seg->maxpasses = 10;
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304 seg->maxpasses = (((seg - 1)->maxpasses == 1) || ((seg - 1)->maxpasses == 10)) ? 2 : 1;
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307 seg->maxpasses = 109;
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311 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) {
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312 int bandno, cblkno;
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313 unsigned char *c = src;
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315 opj_cp_t *cp = t2->cp;
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317 int compno = pi->compno; /* component value */
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318 int resno = pi->resno; /* resolution level value */
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319 int precno = pi->precno; /* precinct value */
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320 int layno = pi->layno; /* quality layer value */
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322 opj_tcd_tilecomp_t *tilec = &tile->comps[compno];
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323 opj_tcd_resolution_t *res = &tilec->resolutions[resno];
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325 unsigned char *hd = NULL;
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328 opj_bio_t *bio = NULL; /* BIO component */
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331 for (bandno = 0; bandno < res->numbands; bandno++) {
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332 opj_tcd_band_t *band = &res->bands[bandno];
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333 opj_tcd_precinct_t *prc = &band->precincts[precno];
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335 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
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337 tgt_reset(prc->incltree);
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338 tgt_reset(prc->imsbtree);
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339 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
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340 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
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348 if (tcp->csty & J2K_CP_CSTY_SOP) {
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349 if ((*c) != 0xff || (*(c + 1) != 0x91)) {
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350 opj_event_msg(t2->cinfo, EVT_WARNING, "Expected SOP marker\n");
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355 /** TODO : check the Nsop value */
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359 When the marker PPT/PPM is used the packet header are store in PPT/PPM marker
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360 This part deal with this caracteristic
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361 step 1: Read packet header in the saved structure
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362 step 2: Return to codestream for decoding
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365 bio = bio_create();
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367 if (cp->ppm == 1) { /* PPM */
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369 bio_init_dec(bio, hd, cp->ppm_len);
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370 } else if (tcp->ppt == 1) { /* PPT */
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371 hd = tcp->ppt_data;
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372 bio_init_dec(bio, hd, tcp->ppt_len);
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373 } else { /* Normal Case */
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375 bio_init_dec(bio, hd, src+len-hd);
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378 present = bio_read(bio, 1);
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382 hd += bio_numbytes(bio);
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387 if (tcp->csty & J2K_CP_CSTY_EPH) {
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388 if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
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389 printf("Error : expected EPH marker\n");
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395 if (cp->ppm == 1) { /* PPM case */
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396 cp->ppm_len += cp->ppm_data-hd;
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400 if (tcp->ppt == 1) { /* PPT case */
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401 tcp->ppt_len+=tcp->ppt_data-hd;
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402 tcp->ppt_data = hd;
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409 for (bandno = 0; bandno < res->numbands; bandno++) {
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410 opj_tcd_band_t *band = &res->bands[bandno];
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411 opj_tcd_precinct_t *prc = &band->precincts[precno];
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413 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
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415 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
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416 int included, increment, n;
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417 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
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418 opj_tcd_seg_t *seg = NULL;
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419 /* if cblk not yet included before --> inclusion tagtree */
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420 if (!cblk->numsegs) {
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421 included = tgt_decode(bio, prc->incltree, cblkno, layno + 1);
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424 included = bio_read(bio, 1);
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426 /* if cblk not included */
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428 cblk->numnewpasses = 0;
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431 /* if cblk not yet included --> zero-bitplane tagtree */
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432 if (!cblk->numsegs) {
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434 for (i = 0; !tgt_decode(bio, prc->imsbtree, cblkno, i); i++) {
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438 cblk->numbps = band->numbps - numimsbs;
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439 cblk->numlenbits = 3;
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441 /* number of coding passes */
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442 cblk->numnewpasses = t2_getnumpasses(bio);
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443 increment = t2_getcommacode(bio);
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444 /* length indicator increment */
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445 cblk->numlenbits += increment;
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446 if (!cblk->numsegs) {
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447 seg = &cblk->segs[0];
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448 t2_init_seg(seg, tcp->tccps[compno].cblksty, 1);
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450 seg = &cblk->segs[cblk->numsegs - 1];
\r
451 if (seg->numpasses == seg->maxpasses) {
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452 t2_init_seg(++seg, tcp->tccps[compno].cblksty, 0);
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455 n = cblk->numnewpasses;
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458 seg->numnewpasses = int_min(seg->maxpasses - seg->numpasses, n);
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459 seg->newlen = bio_read(bio, cblk->numlenbits + int_floorlog2(seg->numnewpasses));
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460 n -= seg->numnewpasses;
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462 t2_init_seg(++seg, tcp->tccps[compno].cblksty, 0);
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468 if (bio_inalign(bio)) {
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473 hd += bio_numbytes(bio);
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477 if (tcp->csty & J2K_CP_CSTY_EPH) {
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478 if ((*hd) != 0xff || (*(hd + 1) != 0x92)) {
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479 opj_event_msg(t2->cinfo, EVT_ERROR, "Expected EPH marker\n");
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486 cp->ppm_len+=cp->ppm_data-hd;
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488 } else if (tcp->ppt == 1) {
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489 tcp->ppt_len+=tcp->ppt_data-hd;
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490 tcp->ppt_data = hd;
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495 for (bandno = 0; bandno < res->numbands; bandno++) {
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496 opj_tcd_band_t *band = &res->bands[bandno];
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497 opj_tcd_precinct_t *prc = &band->precincts[precno];
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499 if ((band->x1-band->x0 == 0)||(band->y1-band->y0 == 0)) continue;
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501 for (cblkno = 0; cblkno < prc->cw * prc->ch; cblkno++) {
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502 opj_tcd_cblk_t *cblk = &prc->cblks[cblkno];
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503 opj_tcd_seg_t *seg = NULL;
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504 if (!cblk->numnewpasses)
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506 if (!cblk->numsegs) {
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507 seg = &cblk->segs[0];
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511 seg = &cblk->segs[cblk->numsegs - 1];
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512 if (seg->numpasses == seg->maxpasses) {
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519 if (c + seg->newlen > src + len) {
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523 memcpy(cblk->data + cblk->len, c, seg->newlen);
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524 if (seg->numpasses == 0) {
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525 seg->data = cblk->data + cblk->len;
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528 cblk->len += seg->newlen;
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529 seg->len += seg->newlen;
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530 seg->numpasses += seg->numnewpasses;
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531 cblk->numnewpasses -= seg->numnewpasses;
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532 if (cblk->numnewpasses > 0) {
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536 } while (cblk->numnewpasses > 0);
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543 /* ----------------------------------------------------------------------- */
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545 int t2_encode_packets(opj_t2_t* t2, int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_image_info_t *image_info) {
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546 unsigned char *c = dest;
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548 opj_pi_iterator_t *pi = NULL;
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551 opj_image_t *image = t2->image;
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552 opj_cp_t *cp = t2->cp;
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554 /* create a packet iterator */
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555 pi = pi_create(image, cp, tileno);
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557 /* TODO: throw an error */
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562 image_info->num = 0;
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565 for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) {
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566 while (pi_next(&pi[pino])) {
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567 if (pi[pino].layno < maxlayers) {
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568 e = t2_encode_packet(tile, &cp->tcps[tileno], &pi[pino], c, dest + len - c, image_info, tileno);
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576 if(image_info && image_info->index_on) {
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577 if(image_info->index_write) {
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578 opj_tile_info_t *info_TL = &image_info->tile[tileno];
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579 opj_packet_info_t *info_PK = &info_TL->packet[image_info->num];
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580 if (!image_info->num) {
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581 info_PK->start_pos = info_TL->end_header + 1;
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583 info_PK->start_pos = info_TL->packet[image_info->num - 1].end_pos + 1;
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585 info_PK->end_pos = info_PK->start_pos + e - 1;
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595 /* don't forget to release pi */
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596 pi_destroy(pi, cp, tileno);
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605 int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile) {
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606 unsigned char *c = src;
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607 opj_pi_iterator_t *pi;
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611 opj_image_t *image = t2->image;
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612 opj_cp_t *cp = t2->cp;
\r
614 /* create a packet iterator */
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615 pi = pi_create(image, cp, tileno);
\r
617 /* TODO: throw an error */
\r
621 for (pino = 0; pino <= cp->tcps[tileno].numpocs; pino++) {
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622 while (pi_next(&pi[pino])) {
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623 if ((cp->layer==0) || (cp->layer>=((pi[pino].layno)+1))) {
\r
624 e = t2_decode_packet(t2, c, src + len - c, tile, &cp->tcps[tileno], &pi[pino]);
\r
629 /* progression in resolution */
\r
630 image->comps[pi[pino].compno].resno_decoded =
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632 int_max(pi[pino].resno, image->comps[pi[pino].compno].resno_decoded)
\r
633 : image->comps[pi[pino].compno].resno_decoded;
\r
636 if (e == -999) { /* ADD */
\r
644 /* don't forget to release pi */
\r
645 pi_destroy(pi, cp, tileno);
\r
654 /* ----------------------------------------------------------------------- */
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656 opj_t2_t* t2_create(opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp) {
\r
657 /* create the tcd structure */
\r
658 opj_t2_t *t2 = (opj_t2_t*)opj_malloc(sizeof(opj_t2_t));
\r
659 if(!t2) return NULL;
\r
667 void t2_destroy(opj_t2_t *t2) {
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