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openjpeg/libopenjpeg/j2k.c

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/*
* Copyright (c) 2001-2002, David Janssens
* Copyright (c) 2002-2004, Yannick Verschueren
* Copyright (c) 2002-2004, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <math.h>
#include "j2k.h"
#include "cio.h"
#include "tcd.h"
#include "dwt.h"
#include "int.h"
#include "jpt.h"
#define J2K_MS_SOC 0xff4f
#define J2K_MS_SOT 0xff90
#define J2K_MS_SOD 0xff93
#define J2K_MS_EOC 0xffd9
#define J2K_MS_SIZ 0xff51
#define J2K_MS_COD 0xff52
#define J2K_MS_COC 0xff53
#define J2K_MS_RGN 0xff5e
#define J2K_MS_QCD 0xff5c
#define J2K_MS_QCC 0xff5d
#define J2K_MS_POC 0xff5f
#define J2K_MS_TLM 0xff55
#define J2K_MS_PLM 0xff57
#define J2K_MS_PLT 0xff58
#define J2K_MS_PPM 0xff60
#define J2K_MS_PPT 0xff61
#define J2K_MS_SOP 0xff91
#define J2K_MS_EPH 0xff92
#define J2K_MS_CRG 0xff63
#define J2K_MS_COM 0xff64
#define J2K_STATE_MHSOC 0x0001
#define J2K_STATE_MHSIZ 0x0002
#define J2K_STATE_MH 0x0004
#define J2K_STATE_TPHSOT 0x0008
#define J2K_STATE_TPH 0x0010
#define J2K_STATE_MT 0x0020
#define J2K_STATE_NEOC 0x0040
jmp_buf j2k_error;
static int j2k_state;
static int j2k_curtileno;
static j2k_tcp_t j2k_default_tcp;
static unsigned char *j2k_eot;
static int j2k_sot_start;
static int pos_correction;
static j2k_image_t *j2k_img;
static j2k_cp_t *j2k_cp;
static unsigned char **j2k_tile_data;
static int *j2k_tile_len;
static info_image info_IM;
/* Add Patrick */
void j2k_clean()
{
int tileno = 0;
tcd_free_encode(j2k_img, j2k_cp, j2k_curtileno);
if (info_IM.index_on) {
for (tileno = 0; tileno < j2k_cp->tw * j2k_cp->th; tileno++) {
free(info_IM.tile[tileno].packet);
}
free(info_IM.tile);
}
}
/* \Add Patrick */
void j2k_dump_image(j2k_image_t * img)
{
int compno;
fprintf(stderr, "image {\n");
fprintf(stderr, " x0=%d, y0=%d, x1=%d, y1=%d\n", img->x0, img->y0,
img->x1, img->y1);
fprintf(stderr, " numcomps=%d\n", img->numcomps);
for (compno = 0; compno < img->numcomps; compno++) {
j2k_comp_t *comp = &img->comps[compno];
fprintf(stderr, " comp %d {\n", compno);
fprintf(stderr, " dx=%d, dy=%d\n", comp->dx, comp->dy);
fprintf(stderr, " prec=%d\n", comp->prec);
fprintf(stderr, " sgnd=%d\n", comp->sgnd);
fprintf(stderr, " }\n");
}
fprintf(stderr, "}\n");
}
void j2k_dump_cp(j2k_image_t * img, j2k_cp_t * cp)
{
int tileno, compno, layno, bandno, resno, numbands;
fprintf(stderr, "coding parameters {\n");
fprintf(stderr, " tx0=%d, ty0=%d\n", cp->tx0, cp->ty0);
fprintf(stderr, " tdx=%d, tdy=%d\n", cp->tdx, cp->tdy);
fprintf(stderr, " tw=%d, th=%d\n", cp->tw, cp->th);
for (tileno = 0; tileno < cp->tw * cp->th; tileno++) {
j2k_tcp_t *tcp = &cp->tcps[tileno];
fprintf(stderr, " tile %d {\n", tileno);
fprintf(stderr, " csty=%x\n", tcp->csty);
fprintf(stderr, " prg=%d\n", tcp->prg);
fprintf(stderr, " numlayers=%d\n", tcp->numlayers);
fprintf(stderr, " mct=%d\n", tcp->mct);
fprintf(stderr, " rates=");
for (layno = 0; layno < tcp->numlayers; layno++) {
fprintf(stderr, "%d ", tcp->rates[layno]);
}
fprintf(stderr, "\n");
for (compno = 0; compno < img->numcomps; compno++) {
j2k_tccp_t *tccp = &tcp->tccps[compno];
fprintf(stderr, " comp %d {\n", compno);
fprintf(stderr, " csty=%x\n", tccp->csty);
fprintf(stderr, " numresolutions=%d\n", tccp->numresolutions);
fprintf(stderr, " cblkw=%d\n", tccp->cblkw);
fprintf(stderr, " cblkh=%d\n", tccp->cblkh);
fprintf(stderr, " cblksty=%x\n", tccp->cblksty);
fprintf(stderr, " qmfbid=%d\n", tccp->qmfbid);
fprintf(stderr, " qntsty=%d\n", tccp->qntsty);
fprintf(stderr, " numgbits=%d\n", tccp->numgbits);
fprintf(stderr, " roishift=%d\n", tccp->roishift);
fprintf(stderr, " stepsizes=");
numbands =
tccp->qntsty ==
J2K_CCP_QNTSTY_SIQNT ? 1 : tccp->numresolutions * 3 - 2;
for (bandno = 0; bandno < numbands; bandno++) {
fprintf(stderr, "(%d,%d) ", tccp->stepsizes[bandno].mant,
tccp->stepsizes[bandno].expn);
}
fprintf(stderr, "\n");
if (tccp->csty & J2K_CCP_CSTY_PRT) {
fprintf(stderr, " prcw=");
for (resno = 0; resno < tccp->numresolutions; resno++) {
fprintf(stderr, "%d ", tccp->prcw[resno]);
}
fprintf(stderr, "\n");
fprintf(stderr, " prch=");
for (resno = 0; resno < tccp->numresolutions; resno++) {
fprintf(stderr, "%d ", tccp->prch[resno]);
}
fprintf(stderr, "\n");
}
fprintf(stderr, " }\n");
}
fprintf(stderr, " }\n");
}
fprintf(stderr, "}\n");
}
void j2k_write_soc()
{
cio_write(J2K_MS_SOC, 2);
}
void j2k_read_soc()
{
j2k_state = J2K_STATE_MHSIZ;
}
void j2k_write_siz()
{
int i;
int lenp, len;
cio_write(J2K_MS_SIZ, 2); /* SIZ */
lenp = cio_tell();
cio_skip(2);
cio_write(0, 2); /* Rsiz (capabilities) */
cio_write(j2k_img->x1, 4); /* Xsiz */
cio_write(j2k_img->y1, 4); /* Ysiz */
cio_write(j2k_img->x0, 4); /* X0siz */
cio_write(j2k_img->y0, 4); /* Y0siz */
cio_write(j2k_cp->tdx, 4); /* XTsiz */
cio_write(j2k_cp->tdy, 4); /* YTsiz */
cio_write(j2k_cp->tx0, 4); /* XT0siz */
cio_write(j2k_cp->ty0, 4); /* YT0siz */
cio_write(j2k_img->numcomps, 2); /* Csiz */
for (i = 0; i < j2k_img->numcomps; i++) {
cio_write(j2k_img->comps[i].prec - 1 + (j2k_img->comps[i].sgnd << 7), 1); /* Ssiz_i */
cio_write(j2k_img->comps[i].dx, 1); /* XRsiz_i */
cio_write(j2k_img->comps[i].dy, 1); /* YRsiz_i */
}
len = cio_tell() - lenp;
cio_seek(lenp);
cio_write(len, 2); /* Lsiz */
cio_seek(lenp + len);
}
void j2k_read_siz()
{
int len, i;
len = cio_read(2); /* Lsiz */
cio_read(2); /* Rsiz (capabilities) */
j2k_img->x1 = cio_read(4); /* Xsiz */
j2k_img->y1 = cio_read(4); /* Ysiz */
j2k_img->x0 = cio_read(4); /* X0siz */
j2k_img->y0 = cio_read(4); /* Y0siz */
j2k_cp->tdx = cio_read(4); /* XTsiz */
j2k_cp->tdy = cio_read(4); /* YTsiz */
j2k_cp->tx0 = cio_read(4); /* XT0siz */
j2k_cp->ty0 = cio_read(4); /* YT0siz */
j2k_img->numcomps = cio_read(2); /* Csiz */
j2k_img->comps =
(j2k_comp_t *) malloc(j2k_img->numcomps * sizeof(j2k_comp_t));
for (i = 0; i < j2k_img->numcomps; i++) {
int tmp, w, h;
tmp = cio_read(1); /* Ssiz_i */
j2k_img->comps[i].prec = (tmp & 0x7f) + 1;
j2k_img->comps[i].sgnd = tmp >> 7;
j2k_img->comps[i].dx = cio_read(1); /* XRsiz_i */
j2k_img->comps[i].dy = cio_read(1); /* YRsiz_i */
w = int_ceildiv(j2k_img->x1 - j2k_img->x0, j2k_img->comps[i].dx);
h = int_ceildiv(j2k_img->y1 - j2k_img->y0, j2k_img->comps[i].dy);
j2k_img->comps[i].resno_decoded = 0; /* number of resolution decoded */
j2k_img->comps[i].factor = 0; /* reducing factor by component */
}
j2k_cp->tw = int_ceildiv(j2k_img->x1 - j2k_cp->tx0, j2k_cp->tdx);
j2k_cp->th = int_ceildiv(j2k_img->y1 - j2k_cp->ty0, j2k_cp->tdy);
j2k_cp->tcps =
(j2k_tcp_t *) calloc(j2k_cp->tw * j2k_cp->th, sizeof(j2k_tcp_t));
j2k_cp->tileno = (int *) calloc(j2k_cp->tw * j2k_cp->th, sizeof(int));
j2k_cp->tileno_size = 0;
for (i = 0; i < j2k_cp->tw * j2k_cp->th; i++) {
j2k_cp->tcps[i].POC = 0;
j2k_cp->tcps[i].numpocs = 0;
j2k_cp->tcps[i].first = 1;
}
/* Initialization for PPM marker */
j2k_cp->ppm = 0;
j2k_cp->ppm_data = NULL;
j2k_cp->ppm_previous = 0;
j2k_cp->ppm_store = 0;
j2k_default_tcp.tccps =
(j2k_tccp_t *) calloc(sizeof(j2k_tccp_t), j2k_img->numcomps);
for (i = 0; i < j2k_cp->tw * j2k_cp->th; i++) {
j2k_cp->tcps[i].tccps =
(j2k_tccp_t *) calloc(sizeof(j2k_tccp_t), j2k_img->numcomps);
}
j2k_tile_data =
(unsigned char **) calloc(j2k_cp->tw * j2k_cp->th, sizeof(char *));
j2k_tile_len = (int *) calloc(j2k_cp->tw * j2k_cp->th, sizeof(int));
j2k_state = J2K_STATE_MH;
}
void j2k_write_com()
{
unsigned int i;
int lenp, len;
char str[256];
sprintf(str, "%s", j2k_cp->comment);
cio_write(J2K_MS_COM, 2);
lenp = cio_tell();
cio_skip(2);
cio_write(0, 2);
for (i = 0; i < strlen(str); i++) {
cio_write(str[i], 1);
}
len = cio_tell() - lenp;
cio_seek(lenp);
cio_write(len, 2);
cio_seek(lenp + len);
}
void j2k_read_com()
{
int len;
len = cio_read(2);
cio_skip(len - 2);
}
void j2k_write_cox(int compno)
{
int i;
j2k_tcp_t *tcp;
j2k_tccp_t *tccp;
tcp = &j2k_cp->tcps[j2k_curtileno];
tccp = &tcp->tccps[compno];
cio_write(tccp->numresolutions - 1, 1); /* SPcox (D) */
cio_write(tccp->cblkw - 2, 1); /* SPcox (E) */
cio_write(tccp->cblkh - 2, 1); /* SPcox (F) */
cio_write(tccp->cblksty, 1); /* SPcox (G) */
cio_write(tccp->qmfbid, 1); /* SPcox (H) */
if (tccp->csty & J2K_CCP_CSTY_PRT) {
for (i = 0; i < tccp->numresolutions; i++) {
cio_write(tccp->prcw[i] + (tccp->prch[i] << 4), 1); /* SPcox (I_i) */
}
}
}
void j2k_read_cox(int compno)
{
int i;
j2k_tcp_t *tcp;
j2k_tccp_t *tccp;
tcp =
j2k_state ==
J2K_STATE_TPH ? &j2k_cp->tcps[j2k_curtileno] : &j2k_default_tcp;
tccp = &tcp->tccps[compno];
tccp->numresolutions = cio_read(1) + 1; /* SPcox (D) */
tccp->cblkw = cio_read(1) + 2; /* SPcox (E) */
tccp->cblkh = cio_read(1) + 2; /* SPcox (F) */
tccp->cblksty = cio_read(1); /* SPcox (G) */
tccp->qmfbid = cio_read(1); /* SPcox (H) */
if (tccp->csty & J2K_CP_CSTY_PRT) {
for (i = 0; i < tccp->numresolutions; i++) {
int tmp = cio_read(1); /* SPcox (I_i) */
tccp->prcw[i] = tmp & 0xf;
tccp->prch[i] = tmp >> 4;
}
}
}
void j2k_write_cod()
{
j2k_tcp_t *tcp;
int lenp, len;
cio_write(J2K_MS_COD, 2); /* COD */
lenp = cio_tell();
cio_skip(2);
tcp = &j2k_cp->tcps[j2k_curtileno];
cio_write(tcp->csty, 1); /* Scod */
cio_write(tcp->prg, 1); /* SGcod (A) */
cio_write(tcp->numlayers, 2); /* SGcod (B) */
cio_write(tcp->mct, 1); /* SGcod (C) */
j2k_write_cox(0);
len = cio_tell() - lenp;
cio_seek(lenp);
cio_write(len, 2); /* Lcod */
cio_seek(lenp + len);
}
void j2k_read_cod()
{
int len, i, pos;
j2k_tcp_t *tcp;
tcp =
j2k_state ==
J2K_STATE_TPH ? &j2k_cp->tcps[j2k_curtileno] : &j2k_default_tcp;
len = cio_read(2); /* Lcod */
tcp->csty = cio_read(1); /* Scod */
tcp->prg = cio_read(1); /* SGcod (A) */
tcp->numlayers = cio_read(2); /* SGcod (B) */
tcp->mct = cio_read(1); /* SGcod (C) */
pos = cio_tell();
for (i = 0; i < j2k_img->numcomps; i++) {
tcp->tccps[i].csty = tcp->csty & J2K_CP_CSTY_PRT;
cio_seek(pos);
j2k_read_cox(i);
}
}
void j2k_write_coc(int compno)
{
j2k_tcp_t *tcp;
int lenp, len;
cio_write(J2K_MS_COC, 2); /* COC */
lenp = cio_tell();
cio_skip(2);
tcp = &j2k_cp->tcps[j2k_curtileno];
cio_write(compno, j2k_img->numcomps <= 256 ? 1 : 2); /* Ccoc */
cio_write(tcp->tccps[compno].csty, 1); /* Scoc */
j2k_write_cox(compno);
len = cio_tell() - lenp;
cio_seek(lenp);
cio_write(len, 2); /* Lcoc */
cio_seek(lenp + len);
}
void j2k_read_coc()
{
int len, compno;
j2k_tcp_t *tcp;
tcp =
j2k_state ==
J2K_STATE_TPH ? &j2k_cp->tcps[j2k_curtileno] : &j2k_default_tcp;
len = cio_read(2); /* Lcoc */
compno = cio_read(j2k_img->numcomps <= 256 ? 1 : 2); /* Ccoc */
tcp->tccps[compno].csty = cio_read(1); /* Scoc */
j2k_read_cox(compno);
}
void j2k_write_qcx(int compno)
{
j2k_tcp_t *tcp;
j2k_tccp_t *tccp;
int bandno, numbands;
int expn, mant;
tcp = &j2k_cp->tcps[j2k_curtileno];
tccp = &tcp->tccps[compno];
cio_write(tccp->qntsty + (tccp->numgbits << 5), 1); /* Sqcx */
numbands =
tccp->qntsty ==
J2K_CCP_QNTSTY_SIQNT ? 1 : tccp->numresolutions * 3 - 2;
for (bandno = 0; bandno < numbands; bandno++) {
expn = tccp->stepsizes[bandno].expn;
mant = tccp->stepsizes[bandno].mant;
if (tccp->qntsty == J2K_CCP_QNTSTY_NOQNT) {
cio_write(expn << 3, 1); /* SPqcx_i */
} else {
cio_write((expn << 11) + mant, 2); /* SPqcx_i */
}
}
}
void j2k_read_qcx(int compno, int len)
{
int tmp;
j2k_tcp_t *tcp;
j2k_tccp_t *tccp;
int bandno, numbands;
tcp =
j2k_state ==
J2K_STATE_TPH ? &j2k_cp->tcps[j2k_curtileno] : &j2k_default_tcp;
tccp = &tcp->tccps[compno];
tmp = cio_read(1); /* Sqcx */
tccp->qntsty = tmp & 0x1f;
tccp->numgbits = tmp >> 5;
numbands =
tccp->qntsty == J2K_CCP_QNTSTY_SIQNT ? 1 : (tccp->qntsty ==
J2K_CCP_QNTSTY_NOQNT ?
len - 1 : (len - 1) / 2);
for (bandno = 0; bandno < numbands; bandno++) {
int expn, mant;
if (tccp->qntsty == J2K_CCP_QNTSTY_NOQNT) { /* WHY STEPSIZES WHEN NOQNT ? */
expn = cio_read(1) >> 3; /* SPqcx_i */
mant = 0;
} else {
tmp = cio_read(2); /* SPqcx_i */
expn = tmp >> 11;
mant = tmp & 0x7ff;
}
tccp->stepsizes[bandno].expn = expn;
tccp->stepsizes[bandno].mant = mant;
}
}
void j2k_write_qcd()
{
int lenp, len;
cio_write(J2K_MS_QCD, 2); /* QCD */
lenp = cio_tell();
cio_skip(2);
j2k_write_qcx(0);
len = cio_tell() - lenp;
cio_seek(lenp);
cio_write(len, 2); /* Lqcd */
cio_seek(lenp + len);
}
void j2k_read_qcd()
{
int len, i, pos;
len = cio_read(2); /* Lqcd */
pos = cio_tell();
for (i = 0; i < j2k_img->numcomps; i++) {
cio_seek(pos);
j2k_read_qcx(i, len - 2);
}
}
void j2k_write_qcc(int compno)
{
int lenp, len;
cio_write(J2K_MS_QCC, 2); /* QCC */
lenp = cio_tell();
cio_skip(2);
cio_write(compno, j2k_img->numcomps <= 256 ? 1 : 2); /* Cqcc */
j2k_write_qcx(compno);
len = cio_tell() - lenp;
cio_seek(lenp);
cio_write(len, 2); /* Lqcc */
cio_seek(lenp + len);
}
void j2k_read_qcc()
{
int len, compno;
len = cio_read(2); /* Lqcc */
compno = cio_read(j2k_img->numcomps <= 256 ? 1 : 2); /* Cqcc */
j2k_read_qcx(compno, len - 2 - (j2k_img->numcomps <= 256 ? 1 : 2));
}
void j2k_write_poc()
{
int len, numpchgs, i;
j2k_tcp_t *tcp;
j2k_tccp_t *tccp;
tcp = &j2k_cp->tcps[j2k_curtileno];
tccp = &tcp->tccps[0];
numpchgs = tcp->numpocs;
cio_write(J2K_MS_POC, 2); /* POC */
len = 2 + (5 + 2 * (j2k_img->numcomps <= 256 ? 1 : 2)) * numpchgs;
cio_write(len, 2); /* Lpoc */
for (i = 0; i < numpchgs; i++) {
// MODIF
j2k_poc_t *poc;
poc = &tcp->pocs[i];
cio_write(poc->resno0, 1); /* RSpoc_i */
cio_write(poc->compno0, (j2k_img->numcomps <= 256 ? 1 : 2)); /* CSpoc_i */
cio_write(poc->layno1, 2); /* LYEpoc_i */
poc->layno1 = int_min(poc->layno1, tcp->numlayers);
cio_write(poc->resno1, 1); /* REpoc_i */
poc->resno1 = int_min(poc->resno1, tccp->numresolutions);
cio_write(poc->compno1, (j2k_img->numcomps <= 256 ? 1 : 2)); /* CEpoc_i */
poc->compno1 = int_min(poc->compno1, j2k_img->numcomps);
cio_write(poc->prg, 1); /* Ppoc_i */
}
}
void j2k_read_poc()
{
int len, numpchgs, i, old_poc;
j2k_tcp_t *tcp;
j2k_tccp_t *tccp;
tcp =
j2k_state ==
J2K_STATE_TPH ? &j2k_cp->tcps[j2k_curtileno] : &j2k_default_tcp;
old_poc = tcp->POC ? tcp->numpocs + 1 : 0;
tcp->POC = 1;
tccp = &tcp->tccps[0];
len = cio_read(2); /* Lpoc */
numpchgs = (len - 2) / (5 + 2 * (j2k_img->numcomps <= 256 ? 1 : 2));
for (i = old_poc; i < numpchgs + old_poc; i++) {
j2k_poc_t *poc;
poc = &tcp->pocs[i];
poc->resno0 = cio_read(1); /* RSpoc_i */
poc->compno0 = cio_read(j2k_img->numcomps <= 256 ? 1 : 2); /* CSpoc_i */
poc->layno1 = int_min(cio_read(2), tcp->numlayers); /* LYEpoc_i */
poc->resno1 = int_min(cio_read(1), tccp->numresolutions); /* REpoc_i */
poc->compno1 = int_min(cio_read(j2k_img->numcomps <= 256 ? 1 : 2), j2k_img->numcomps); /* CEpoc_i */
poc->prg = cio_read(1); /* Ppoc_i */
}
tcp->numpocs = numpchgs + old_poc - 1;
}
void j2k_read_crg()
{
int len, i, Xcrg_i, Ycrg_i;
len = cio_read(2); /* Lcrg */
for (i = 0; i < j2k_img->numcomps; i++) {
Xcrg_i = cio_read(2); /* Xcrg_i */
Ycrg_i = cio_read(2); /* Ycrg_i */
}
}
void j2k_read_tlm()
{
int len, Ztlm, Stlm, ST, SP, tile_tlm, i;
long int Ttlm_i, Ptlm_i;
len = cio_read(2); /* Ltlm */
Ztlm = cio_read(1); /* Ztlm */
Stlm = cio_read(1); /* Stlm */
ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
SP = (Stlm >> 6) & 0x01;
tile_tlm = (len - 4) / ((SP + 1) * 2 + ST);
for (i = 0; i < tile_tlm; i++) {
Ttlm_i = cio_read(ST); /* Ttlm_i */
Ptlm_i = cio_read(SP ? 4 : 2); /* Ptlm_i */
}
}
void j2k_read_plm()
{
int len, i, Zplm, Nplm, add, packet_len = 0;
len = cio_read(2); /* Lplm */
Zplm = cio_read(1); /* Zplm */
len -= 3;
while (len > 0) {
Nplm = cio_read(4); /* Nplm */
len -= 4;
for (i = Nplm; i > 0; i--) {
add = cio_read(1);
len--;
packet_len = (packet_len << 7) + add; /* Iplm_ij */
if ((add & 0x80) == 0) {
/* New packet */
packet_len = 0;
}
if (len <= 0)
break;
}
}
}
void j2k_read_plt()
{
int len, i, Zplt, packet_len = 0, add;
len = cio_read(2); /* Lplt */
Zplt = cio_read(1); /* Zplt */
for (i = len - 3; i > 0; i--) {
add = cio_read(1);
packet_len = (packet_len << 7) + add; /* Iplt_i */
if ((add & 0x80) == 0) {
/* New packet */
packet_len = 0;
}
}
}
void j2k_read_ppm()
{
int len, Z_ppm, i, j;
int N_ppm;
len = cio_read(2);
j2k_cp->ppm = 1;
Z_ppm = cio_read(1); /* Z_ppm */
len -= 3;
while (len > 0) {
if (j2k_cp->ppm_previous == 0) {
N_ppm = cio_read(4); /* N_ppm */
len -= 4;
} else {
N_ppm = j2k_cp->ppm_previous;
}
j = j2k_cp->ppm_store;
if (Z_ppm == 0) /* First PPM marker */
j2k_cp->ppm_data =
(unsigned char *) calloc(N_ppm, sizeof(unsigned char));
else /* NON-first PPM marker */
j2k_cp->ppm_data =
(unsigned char *) realloc(j2k_cp->ppm_data,
(N_ppm +
j2k_cp->ppm_store) *
sizeof(unsigned char));
for (i = N_ppm; i > 0; i--) { /* Read packet header */
j2k_cp->ppm_data[j] = cio_read(1);
j++;
len--;
if (len == 0)
break; /* Case of non-finished packet header in present marker but finished in next one */
}
j2k_cp->ppm_previous = i - 1;
j2k_cp->ppm_store = j;
}
}
void j2k_read_ppt()
{
int len, Z_ppt, i, j = 0;
j2k_tcp_t *tcp;
len = cio_read(2);
Z_ppt = cio_read(1);
tcp = &j2k_cp->tcps[j2k_curtileno];
tcp->ppt = 1;
if (Z_ppt == 0) { /* First PPT marker */
tcp->ppt_data =
(unsigned char *) calloc(len - 3, sizeof(unsigned char));
tcp->ppt_store = 0;
} else /* NON-first PPT marker */
tcp->ppt_data =
(unsigned char *) realloc(tcp->ppt_data,
(len - 3 +
tcp->ppt_store) * sizeof(unsigned char));
j = tcp->ppt_store;
for (i = len - 3; i > 0; i--) {
tcp->ppt_data[j] = cio_read(1);
j++;
}
tcp->ppt_store = j;
}
void j2k_write_sot()
{
int lenp, len;
j2k_sot_start = cio_tell();
cio_write(J2K_MS_SOT, 2); /* SOT */
lenp = cio_tell();
cio_skip(2); /* Lsot (further) */
cio_write(j2k_curtileno, 2); /* Isot */
cio_skip(4); /* Psot (further in j2k_write_sod) */
cio_write(0, 1); /* TPsot */
cio_write(1, 1); /* TNsot */
len = cio_tell() - lenp;
cio_seek(lenp);
cio_write(len, 2); /* Lsot */
cio_seek(lenp + len);
}
void j2k_read_sot()
{
int len, tileno, totlen, partno, numparts, i;
j2k_tcp_t *tcp;
j2k_tccp_t *tmp;
char status = 0;
len = cio_read(2);
tileno = cio_read(2);
if (j2k_cp->tileno_size == 0) {
j2k_cp->tileno[j2k_cp->tileno_size] = tileno;
j2k_cp->tileno_size++;
} else {
i = 0;
while (i < j2k_cp->tileno_size && status == 0) {
status = j2k_cp->tileno[i] == tileno ? 1 : 0;
i++;
}
if (status == 0) {
j2k_cp->tileno[j2k_cp->tileno_size] = tileno;
j2k_cp->tileno_size++;
}
}
totlen = cio_read(4);
if (!totlen)
totlen = cio_numbytesleft() + 8;
partno = cio_read(1);
numparts = cio_read(1);
j2k_curtileno = tileno;
j2k_eot = cio_getbp() - 12 + totlen;
j2k_state = J2K_STATE_TPH;
tcp = &j2k_cp->tcps[j2k_curtileno];
if (tcp->first == 1) {
tmp = tcp->tccps;
*tcp = j2k_default_tcp;
/* Initialization PPT */
tcp->ppt = 0;
tcp->ppt_data = NULL;
tcp->tccps = tmp;
for (i = 0; i < j2k_img->numcomps; i++) {
tcp->tccps[i] = j2k_default_tcp.tccps[i];
}
j2k_cp->tcps[j2k_curtileno].first = 0;
}
}
void j2k_write_sod()
{
int l, layno;
int totlen;
j2k_tcp_t *tcp;
static int j2k_sod_start;
cio_write(J2K_MS_SOD, 2);
if (j2k_curtileno == 0) {
j2k_sod_start = cio_tell() + pos_correction;
}
/* INDEX >> */
if (info_IM.index_on) {
info_IM.tile[j2k_curtileno].end_header =
cio_tell() + pos_correction - 1;
info_IM.tile[j2k_curtileno].packet =
(info_packet *) calloc(info_IM.Comp * info_IM.Layer *
(info_IM.Decomposition + 1) * 100,
sizeof(info_packet));
}
/* << INDEX */
tcp = &j2k_cp->tcps[j2k_curtileno];
for (layno = 0; layno < tcp->numlayers; layno++) {
tcp->rates[layno] -= (j2k_sod_start / (j2k_cp->th * j2k_cp->tw));
}
info_IM.num = 0;
if (j2k_cp->image_type)
l = tcd_encode_tile_pxm(j2k_curtileno, cio_getbp(),
cio_numbytesleft() - 2, &info_IM);
else
l = tcd_encode_tile_pgx(j2k_curtileno, cio_getbp(),
cio_numbytesleft() - 2, &info_IM);
/* Writing Psot in SOT marker */
totlen = cio_tell() + l - j2k_sot_start;
cio_seek(j2k_sot_start + 6);
cio_write(totlen, 4);
cio_seek(j2k_sot_start + totlen);
}
void j2k_read_sod()
{
int len, truncate = 0, i;
unsigned char *data;
len = int_min(j2k_eot - cio_getbp(), cio_numbytesleft() + 1);
if (len == cio_numbytesleft() + 1)
truncate = 1; /* Case of a truncate codestream */
data =
(unsigned char *) malloc((j2k_tile_len[j2k_curtileno] + len) *
sizeof(unsigned char));
for (i = 0; i < j2k_tile_len[j2k_curtileno]; i++)
data[i] = j2k_tile_data[j2k_curtileno][i];
for (i = 0; i < len; i++)
data[i + j2k_tile_len[j2k_curtileno]] = cio_read(1);
j2k_tile_len[j2k_curtileno] += len;
free(j2k_tile_data[j2k_curtileno]);
j2k_tile_data[j2k_curtileno] = data;
data = NULL;
if (!truncate)
j2k_state = J2K_STATE_TPHSOT;
else
j2k_state = J2K_STATE_NEOC; /* RAJOUTE !! */
}
void j2k_write_rgn(int compno, int tileno)
{
j2k_tcp_t *tcp = &j2k_cp->tcps[tileno];
cio_write(J2K_MS_RGN, 2); /* RGN */
cio_write(j2k_img->numcomps <= 256 ? 5 : 6, 2); /* Lrgn */
cio_write(compno, j2k_img->numcomps <= 256 ? 1 : 2); /* Crgn */
cio_write(0, 1); /* Srgn */
cio_write(tcp->tccps[compno].roishift, 1); /* SPrgn */
}
void j2k_read_rgn()
{
int len, compno, roisty;
j2k_tcp_t *tcp;
tcp =
j2k_state ==
J2K_STATE_TPH ? &j2k_cp->tcps[j2k_curtileno] : &j2k_default_tcp;
len = cio_read(2); /* Lrgn */
compno = cio_read(j2k_img->numcomps <= 256 ? 1 : 2); /* Crgn */
roisty = cio_read(1); /* Srgn */
tcp->tccps[compno].roishift = cio_read(1); /* SPrgn */
}
void j2k_write_eoc()
{
/* fprintf(stderr, "%.8x: EOC\n", cio_tell() + pos_correction); */
cio_write(J2K_MS_EOC, 2);
}
void j2k_read_eoc()
{
int i, tileno;
tcd_init(j2k_img, j2k_cp);
for (i = 0; i < j2k_cp->tileno_size; i++) {
tileno = j2k_cp->tileno[i];
tcd_decode_tile(j2k_tile_data[tileno], j2k_tile_len[tileno], tileno);
}
j2k_state = J2K_STATE_MT;
longjmp(j2k_error, 1);
}
void j2k_read_unk()
{
fprintf(stderr, "warning: unknown marker\n");
}
LIBJ2K_API int j2k_encode(j2k_image_t * img, j2k_cp_t * cp, char *output,
int len, char *index)
{
int tileno, compno, layno, resno, precno, pack_nb;
char *dest;
FILE *INDEX;
FILE *f;
if (setjmp(j2k_error)) {
return 0;
}
if (cp->intermed_file==1) {
f = fopen(output, "wb");
if (!f) {
fprintf(stderr, "failed to open %s for writing\n", output);
return 1;
}
dest = (char *) malloc(len);
cio_init(dest, len);
}
j2k_img = img;
j2k_cp = cp;
/* j2k_dump_cp(j2k_img, j2k_cp); */
/* INDEX >> */
info_IM.index_on = j2k_img->index_on;
if (info_IM.index_on) {
info_IM.tile =
(info_tile *) malloc(j2k_cp->tw * j2k_cp->th * sizeof(info_tile));
info_IM.Im_w = j2k_img->x1 - j2k_img->x0;
info_IM.Im_h = j2k_img->y1 - j2k_img->y0;
info_IM.Prog = (&j2k_cp->tcps[0])->prg;
info_IM.tw=j2k_cp->tw;
info_IM.th=j2k_cp->th;
info_IM.Tile_x = j2k_cp->tdx; /* new version parser */
info_IM.Tile_y = j2k_cp->tdy; /* new version parser */
info_IM.Comp = j2k_img->numcomps;
info_IM.Layer = (&j2k_cp->tcps[0])->numlayers;
info_IM.Decomposition = (&j2k_cp->tcps[0])->tccps->numresolutions - 1;
info_IM.D_max = 0; /* ADD Marcela */
}
/* << INDEX */
j2k_write_soc();
j2k_write_siz();
j2k_write_cod();
j2k_write_qcd();
for (compno = 0; compno < j2k_img->numcomps; compno++) {
j2k_tcp_t *tcp = &j2k_cp->tcps[0];
if (tcp->tccps[compno].roishift)
j2k_write_rgn(compno, 0);
}
if (j2k_cp->comment != NULL)
j2k_write_com();
if (cp->intermed_file==1) {
/* Writing the main header */
pos_correction = cio_tell();
fwrite(dest, 1, cio_tell(), f);
}
/* INDEX >> */
if (info_IM.index_on) {
info_IM.Main_head_end = cio_tell() - 1;
}
/* << INDEX */
for (tileno = 0; tileno < cp->tw * cp->th; tileno++) {
fprintf(stderr, "\nTile number %d / %d \n", tileno + 1,
cp->tw * cp->th);
if (cp->intermed_file==1) {
/* new dest for each tile */
free(dest);
dest = (char *) malloc(len);
cio_init(dest, len);
}
j2k_curtileno = tileno;
/* initialisation before tile encoding */
if (tileno == 0) {
tcd_malloc_encode(j2k_img, j2k_cp, j2k_curtileno);
} else {
tcd_init_encode(j2k_img, j2k_cp, j2k_curtileno);
}
/* INDEX >> */
if (info_IM.index_on) {
info_IM.tile[j2k_curtileno].num_tile = j2k_curtileno;
info_IM.tile[j2k_curtileno].start_pos = cio_tell() + pos_correction;
}
/* << INDEX */
j2k_write_sot();
for (compno = 1; compno < img->numcomps; compno++) {
j2k_write_coc(compno);
j2k_write_qcc(compno);
}
if (cp->tcps[tileno].numpocs)
j2k_write_poc();
j2k_write_sod();
/* INDEX >> */
if (info_IM.index_on) {
info_IM.tile[j2k_curtileno].end_pos =
cio_tell() + pos_correction - 1;
}
/* << INDEX */
/*
if (tile->PPT) BAD PPT !!!
{
FILE *PPT_file;
int i;
PPT_file=fopen("PPT","rb");
fprintf(stderr,"%c%c%c%c",255,97,tile->len_ppt/256,tile->len_ppt%256);
for (i=0;i<tile->len_ppt;i++)
{
unsigned char elmt;
fread(&elmt, 1, 1, PPT_file);
fwrite(&elmt,1,1,f);
}
fclose(PPT_file);
unlink("PPT");
}
*/
if (cp->intermed_file==1) {
fwrite(dest, 1, cio_tell(), f);
pos_correction = cio_tell() + pos_correction;
}
}
if (cp->intermed_file==1) {
free(dest);
dest = (char *) malloc(len);
cio_init(dest, len);
}
j2k_write_eoc();
if (cp->intermed_file==1) {
fwrite(dest, 1, 2, f);
free(dest);
/* closing file *.j2k */
fclose(f);
}
/* Creation of the index file */
if (info_IM.index_on) {
double DistoTotal = 0;
info_IM.codestream_size = cio_tell() + pos_correction; /* Correction 14/4/03 suite rmq de Patrick */
INDEX = fopen(index, "w");
if (!INDEX) {
fprintf(stderr, "failed to open %s for writing\n", index);
return 1;
}
fprintf(INDEX, "%d %d\n", info_IM.Im_w, info_IM.Im_h);
fprintf(INDEX, "%d\n", info_IM.Prog);
fprintf(INDEX, "%d %d\n", info_IM.Tile_x, info_IM.Tile_y);
fprintf(INDEX, "%d %d\n", info_IM.tw, info_IM.th);
fprintf(INDEX, "%d\n", info_IM.Comp);
fprintf(INDEX, "%d\n", info_IM.Layer);
fprintf(INDEX, "%d\n", info_IM.Decomposition);
for (resno=info_IM.Decomposition;resno>=0;resno--) {
fprintf(INDEX, "[%d,%d] ", (1<<info_IM.tile[0].pdx[resno]), (1<<info_IM.tile[0].pdx[resno])); //based on tile 0
}
fprintf(INDEX,"\n");
fprintf(INDEX, "%d\n", info_IM.Main_head_end);
fprintf(INDEX, "%d\n", info_IM.codestream_size);
for (tileno = 0; tileno < info_IM.tw * info_IM.th; tileno++) {
fprintf(INDEX, "%4d %9d %9d %9d %9e %9d %9e\n",
info_IM.tile[tileno].num_tile,
info_IM.tile[tileno].start_pos,
info_IM.tile[tileno].end_header,
info_IM.tile[tileno].end_pos, info_IM.tile[tileno].distotile, info_IM.tile[tileno].nbpix,
info_IM.tile[tileno].distotile / info_IM.tile[tileno].nbpix);
}
for (tileno = 0; tileno < info_IM.tw * info_IM.th; tileno++) {
int start_pos, end_pos;
double disto = 0;
pack_nb = 0;
/* fprintf(INDEX,
"pkno tileno layerno resno compno precno start_pos end_pos deltaSE \n");*/
if (info_IM.Prog == 0) { /* LRCP */
for (layno = 0; layno < info_IM.Layer; layno++) {
for (resno = 0; resno < info_IM.Decomposition + 1; resno++) {
for (compno = 0; compno < info_IM.Comp; compno++) {
for (precno = 0;
precno <
info_IM.tile[tileno].pw[resno] * info_IM.tile[tileno].ph[resno];
precno++) {
start_pos = info_IM.tile[tileno].packet[pack_nb].start_pos;
end_pos = info_IM.tile[tileno].packet[pack_nb].end_pos;
disto = info_IM.tile[tileno].packet[pack_nb].disto;
fprintf(INDEX, "%4d %6d %7d %5d %6d %6d %9d %9d %8e\n",
pack_nb, tileno, layno, resno, compno, precno,
start_pos, end_pos, disto);
DistoTotal += disto;
pack_nb++;
}
}
}
}
} else if (info_IM.Prog == 1) { /* RLCP */
for (resno = 0; resno < info_IM.Decomposition + 1; resno++) {
for (layno = 0; layno < info_IM.Layer; layno++) {
for (compno = 0; compno < info_IM.Comp; compno++) {
for (precno = 0; precno < info_IM.tile[tileno].pw[resno] * info_IM.tile[tileno].ph[resno]; precno++) {
start_pos = info_IM.tile[tileno].packet[pack_nb].start_pos;
end_pos = info_IM.tile[tileno].packet[pack_nb].end_pos;
disto = info_IM.tile[tileno].packet[pack_nb].disto;
fprintf(INDEX, "%4d %6d %7d %5d %6d %6d %9d %9d %8e\n",
pack_nb, tileno, layno, resno, compno, precno,
start_pos, end_pos, disto);
DistoTotal += disto;
pack_nb++;
}
}
}
}
} else if (info_IM.Prog == 2) { /* RPCL */
for (resno = 0; resno < info_IM.Decomposition + 1; resno++) {
for (precno = 0; precno < info_IM.tile[tileno].pw[resno] * info_IM.tile[tileno].ph[resno]; precno++) {
for (compno = 0; compno < info_IM.Comp; compno++) {
for (layno = 0; layno < info_IM.Layer; layno++) {
start_pos = info_IM.tile[tileno].packet[pack_nb].start_pos;
end_pos = info_IM.tile[tileno].packet[pack_nb].end_pos;
disto = info_IM.tile[tileno].packet[pack_nb].disto;
fprintf(INDEX, "%4d %6d %7d %5d %6d %6d %9d %9d %8e\n",
pack_nb, tileno, layno, resno, compno, precno,
start_pos, end_pos, disto);
DistoTotal += disto;
pack_nb++;
}
}
}
}
} else if (info_IM.Prog == 3) { /* PCRL */
for (precno = 0; precno < info_IM.tile[tileno].pw[resno] * info_IM.tile[tileno].ph[resno]; precno++) {
for (compno = 0; compno < info_IM.Comp; compno++) {
for (resno = 0; resno < info_IM.Decomposition + 1; resno++) {
for (layno = 0; layno < info_IM.Layer; layno++) {
start_pos = info_IM.tile[tileno].packet[pack_nb].start_pos;
end_pos = info_IM.tile[tileno].packet[pack_nb].end_pos;
disto = info_IM.tile[tileno].packet[pack_nb].disto;
fprintf(INDEX, "%4d %6d %7d %5d %6d %6d %9d %9d %8e\n",
pack_nb, tileno, layno, resno, compno, precno,
start_pos, end_pos, disto);
DistoTotal += disto;
pack_nb++;
}
}
}
}
} else { /* CPRL */
for (compno = 0; compno < info_IM.Comp; compno++) {
for (precno = 0; precno < info_IM.tile[tileno].pw[resno] * info_IM.tile[tileno].ph[resno]; precno++) {
for (resno = 0; resno < info_IM.Decomposition + 1; resno++) {
for (layno = 0; layno < info_IM.Layer; layno++) {
start_pos = info_IM.tile[tileno].packet[pack_nb].start_pos;
end_pos = info_IM.tile[tileno].packet[pack_nb].end_pos;
disto = info_IM.tile[tileno].packet[pack_nb].disto;
fprintf(INDEX, "%4d %6d %7d %5d %6d %6d %9d %9d %8e\n",
pack_nb, tileno, layno, resno, compno, precno,
start_pos, end_pos, disto);
DistoTotal += disto;
pack_nb++;
}
}
}
}
}
}
fprintf(INDEX, "SE max : %8e\n", info_IM.D_max);
fprintf(INDEX, "SE total : %.8e\n", DistoTotal);
fclose(INDEX);
}
j2k_clean();
return cio_tell();
}
typedef struct {
int id;
int states;
void (*handler) ();
} j2k_dec_mstabent_t;
j2k_dec_mstabent_t j2k_dec_mstab[] = {
{J2K_MS_SOC, J2K_STATE_MHSOC, j2k_read_soc},
{J2K_MS_SOT, J2K_STATE_MH | J2K_STATE_TPHSOT, j2k_read_sot},
{J2K_MS_SOD, J2K_STATE_TPH, j2k_read_sod},
{J2K_MS_EOC, J2K_STATE_TPHSOT, j2k_read_eoc},
{J2K_MS_SIZ, J2K_STATE_MHSIZ, j2k_read_siz},
{J2K_MS_COD, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_cod},
{J2K_MS_COC, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_coc},
{J2K_MS_RGN, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_rgn},
{J2K_MS_QCD, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_qcd},
{J2K_MS_QCC, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_qcc},
{J2K_MS_POC, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_poc},
{J2K_MS_TLM, J2K_STATE_MH, j2k_read_tlm},
{J2K_MS_PLM, J2K_STATE_MH, j2k_read_plm},
{J2K_MS_PLT, J2K_STATE_TPH, j2k_read_plt},
{J2K_MS_PPM, J2K_STATE_MH, j2k_read_ppm},
{J2K_MS_PPT, J2K_STATE_TPH, j2k_read_ppt},
{J2K_MS_SOP, 0, 0},
{J2K_MS_CRG, J2K_STATE_MH, j2k_read_crg},
{J2K_MS_COM, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_com},
{0, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_unk}
};
j2k_dec_mstabent_t *j2k_dec_mstab_lookup(int id)
{
j2k_dec_mstabent_t *e;
for (e = j2k_dec_mstab; e->id != 0; e++) {
if (e->id == id) {
break;
}
}
return e;
}
LIBJ2K_API int j2k_decode(unsigned char *src, int len, j2k_image_t ** img,
j2k_cp_t ** cp, j2k_option_t option)
{
if (setjmp(j2k_error)) {
if (j2k_state != J2K_STATE_MT) {
fprintf(stderr, "WARNING: incomplete bitstream\n");
return 0;
}
return cio_numbytes();
}
j2k_img = (j2k_image_t *) malloc(sizeof(j2k_image_t));
j2k_cp = (j2k_cp_t *) malloc(sizeof(j2k_cp_t));
*img = j2k_img;
*cp = j2k_cp;
/* Option */
j2k_cp->reduce_on = option.reduce_on;
j2k_cp->reduce_value = option.reduce_value;
j2k_state = J2K_STATE_MHSOC;
cio_init(src, len);
for (;;) {
j2k_dec_mstabent_t *e;
int id = cio_read(2);
if (id >> 8 != 0xff) {
fprintf(stderr, "%.8x: expected a marker instead of %x\n",
cio_tell() - 2, id);
return 0;
}
e = j2k_dec_mstab_lookup(id);
if (!(j2k_state & e->states)) {
fprintf(stderr, "%.8x: unexpected marker %x\n", cio_tell() - 2, id);
return 0;
}
if (e->handler) {
(*e->handler) ();
}
if (j2k_state == J2K_STATE_NEOC)
break; /* RAJOUTE */
}
if (j2k_state == J2K_STATE_NEOC)
j2k_read_eoc(); /* RAJOUTE */
return 0;
}
/*
* Read a JPT-stream and decode file
*
*/
int j2k_decode_jpt_stream(unsigned char *src, int len, j2k_image_t ** img,
j2k_cp_t ** cp)
{
jpt_msg_header_struct_t header;
int position;
if (setjmp(j2k_error)) {
if (j2k_state != J2K_STATE_MT) {
fprintf(stderr, "WARNING: incomplete bitstream\n");
return 0;
}
return cio_numbytes();
}
j2k_img = (j2k_image_t *) malloc(sizeof(j2k_image_t));
j2k_cp = (j2k_cp_t *) malloc(sizeof(j2k_cp_t));
*img = j2k_img;
*cp = j2k_cp;
j2k_state = J2K_STATE_MHSOC;
cio_init(src, len);
/* Initialize the header */
jpt_init_Msg_Header(&header);
/* Read the first header of the message */
jpt_read_Msg_Header(&header);
position = cio_tell();
if (header.Class_Id != 6) { /* 6 : Main header data-bin message */
fprintf(stderr,
"[JPT-stream] : Expecting Main header first [class_Id %d] !\n",
header.Class_Id);
return 0;
}
for (;;) {
j2k_dec_mstabent_t *e;
int id;
if (!cio_numbytesleft()) {
j2k_read_eoc();
return 0;
}
/* data-bin read -> need to read a new header */
if ((unsigned int) (cio_tell() - position) == header.Msg_length) {
jpt_read_Msg_Header(&header);
position = cio_tell();
if (header.Class_Id != 4) { /* 4 : Tile data-bin message */
fprintf(stderr, "[JPT-stream] : Expecting Tile info !\n");
return 0;
}
}
id = cio_read(2);
if (id >> 8 != 0xff) {
fprintf(stderr, "%.8x: expected a marker instead of %x\n",
cio_tell() - 2, id);
return 0;
}
e = j2k_dec_mstab_lookup(id);
if (!(j2k_state & e->states)) {
fprintf(stderr, "%.8x: unexpected marker %x\n", cio_tell() - 2, id);
return 0;
}
if (e->handler) {
(*e->handler) ();
}
if (j2k_state == J2K_STATE_NEOC)
break; /* RAJOUTE */
}
if (j2k_state == J2K_STATE_NEOC)
j2k_read_eoc(); /* RAJOUTE */
return 0;
}
#ifdef WIN32
#include <windows.h>
BOOL APIENTRY DllMain(HANDLE hModule, DWORD ul_reason_for_call,
LPVOID lpReserved)
{
switch (ul_reason_for_call) {
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
#endif
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