/*
* Copyright (c) 2004, Yannick Verschueren
- * Copyright (c) 2005, Herv� Drolon, FreeImage Team
+ * Copyright (c) 2005, Herv� Drolon, FreeImage Team
* Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
* All rights reserved.
*
#include "opj_includes.h"
+/** @defgroup JP2 JP2 - JPEG-2000 file format reader/writer */
+/*@{*/
+
+/** @name Local static functions */
+/*@{*/
+
+/**
+Read box headers
+@param cinfo Codec context info
+@param cio Input stream
+@param box
+@return Returns true if successful, returns false otherwise
+*/
+static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box);
+static void jp2_write_url(opj_cio_t *cio, char *Idx_file);
+/**
+Read the IHDR box - Image Header box
+@param jp2 JP2 handle
+@param cio Input buffer stream
+@return Returns true if successful, returns false otherwise
+*/
+static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio);
+static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio);
+static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio);
+static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio);
+static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio);
+static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio);
+/**
+Write the JP2H box - JP2 Header box
+@param jp2 JP2 handle
+@param cio Output buffer stream
+*/
+static void jp2_write_jp2h(opj_jp2_t *jp2, opj_cio_t *cio);
+/**
+Read the JP2H box - JP2 Header box
+@param jp2 JP2 handle
+@param cio Input buffer stream
+@return Returns true if successful, returns false otherwise
+*/
+static bool jp2_read_jp2h(opj_jp2_t *jp2, opj_cio_t *cio);
+/**
+Write the FTYP box - File type box
+@param jp2 JP2 handle
+@param cio Output buffer stream
+*/
+static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio);
+/**
+Read the FTYP box - File type box
+@param jp2 JP2 handle
+@param cio Input buffer stream
+@return Returns true if successful, returns false otherwise
+*/
+static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio);
+static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, char *index);
+static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset);
+static void jp2_write_jp(opj_cio_t *cio);
+/**
+Read the JP box - JPEG 2000 signature
+@param jp2 JP2 handle
+@param cio Input buffer stream
+@return Returns true if successful, returns false otherwise
+*/
+static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio);
+/**
+Decode the structure of a JP2 file
+@param jp2 JP2 handle
+@param cio Input buffer stream
+@return Returns true if successful, returns false otherwise
+*/
+static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio);
+
+/*@}*/
+
+/*@}*/
/* ----------------------------------------------------------------------- */
static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box) {
- box->init_pos = cio_tell(cio);
- box->length = cio_read(cio, 4);
- box->type = cio_read(cio, 4);
- if (box->length == 1) {
- if (cio_read(cio, 4) != 0) {
- opg_event_msg(cinfo, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n");
- return false;
- }
- box->length = cio_read(cio, 4);
- if (box->length == 0)
- box->length = cio_numbytesleft(cio) + 12;
- }
- else if (box->length == 0) {
- box->length = cio_numbytesleft(cio) + 8;
- }
-
- return true;
+ box->init_pos = cio_tell(cio);
+ box->length = cio_read(cio, 4);
+ box->type = cio_read(cio, 4);
+ if (box->length == 1) {
+ if (cio_read(cio, 4) != 0) {
+ opj_event_msg(cinfo, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n");
+ return false;
+ }
+ box->length = cio_read(cio, 4);
+ if (box->length == 0)
+ box->length = cio_numbytesleft(cio) + 12;
+ }
+ else if (box->length == 0) {
+ box->length = cio_numbytesleft(cio) + 8;
+ }
+
+ return true;
}
static void jp2_write_url(opj_cio_t *cio, char *Idx_file) {
- unsigned int i;
- opj_jp2_box_t box;
-
- box.init_pos = cio_tell(cio);
- cio_skip(cio, 4);
- cio_write(cio, JP2_URL, 4); /* DBTL */
- cio_write(cio, 0, 1); /* VERS */
- cio_write(cio, 0, 3); /* FLAG */
-
- if(Idx_file) {
- for (i = 0; i < strlen(Idx_file); i++) {
- cio_write(cio, Idx_file[i], 1);
- }
- }
-
- box.length = cio_tell(cio) - box.init_pos;
- cio_seek(cio, box.init_pos);
- cio_write(cio, box.length, 4); /* L */
- cio_seek(cio, box.init_pos + box.length);
+ unsigned int i;
+ opj_jp2_box_t box;
+
+ box.init_pos = cio_tell(cio);
+ cio_skip(cio, 4);
+ cio_write(cio, JP2_URL, 4); /* DBTL */
+ cio_write(cio, 0, 1); /* VERS */
+ cio_write(cio, 0, 3); /* FLAG */
+
+ if(Idx_file) {
+ for (i = 0; i < strlen(Idx_file); i++) {
+ cio_write(cio, Idx_file[i], 1);
+ }
+ }
+
+ box.length = cio_tell(cio) - box.init_pos;
+ cio_seek(cio, box.init_pos);
+ cio_write(cio, box.length, 4); /* L */
+ cio_seek(cio, box.init_pos + box.length);
}
static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio) {
- opj_jp2_box_t box;
+ opj_jp2_box_t box;
- opj_common_ptr cinfo = jp2->cinfo;
+ opj_common_ptr cinfo = jp2->cinfo;
- jp2_read_boxhdr(cinfo, cio, &box);
- if (JP2_IHDR != box.type) {
- opg_event_msg(cinfo, EVT_ERROR, "Expected IHDR Marker\n");
- return false;
- }
+ jp2_read_boxhdr(cinfo, cio, &box);
+ if (JP2_IHDR != box.type) {
+ opj_event_msg(cinfo, EVT_ERROR, "Expected IHDR Marker\n");
+ return false;
+ }
- jp2->h = cio_read(cio, 4); /* HEIGHT */
- jp2->w = cio_read(cio, 4); /* WIDTH */
- jp2->numcomps = cio_read(cio, 2); /* NC */
+ jp2->h = cio_read(cio, 4); /* HEIGHT */
+ jp2->w = cio_read(cio, 4); /* WIDTH */
+ jp2->numcomps = cio_read(cio, 2); /* NC */
- jp2->bpc = cio_read(cio, 1); /* BPC */
+ jp2->bpc = cio_read(cio, 1); /* BPC */
- jp2->C = cio_read(cio, 1); /* C */
- jp2->UnkC = cio_read(cio, 1); /* UnkC */
- jp2->IPR = cio_read(cio, 1); /* IPR */
+ jp2->C = cio_read(cio, 1); /* C */
+ jp2->UnkC = cio_read(cio, 1); /* UnkC */
+ jp2->IPR = cio_read(cio, 1); /* IPR */
- if (cio_tell(cio) - box.init_pos != box.length) {
- opg_event_msg(cinfo, EVT_ERROR, "Error with IHDR Box\n");
- return false;
- }
+ if (cio_tell(cio) - box.init_pos != box.length) {
+ opj_event_msg(cinfo, EVT_ERROR, "Error with IHDR Box\n");
+ return false;
+ }
- return true;
+ return true;
}
static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio) {
- opj_jp2_box_t box;
+ opj_jp2_box_t box;
- box.init_pos = cio_tell(cio);
- cio_skip(cio, 4);
- cio_write(cio, JP2_IHDR, 4); /* IHDR */
+ box.init_pos = cio_tell(cio);
+ cio_skip(cio, 4);
+ cio_write(cio, JP2_IHDR, 4); /* IHDR */
- cio_write(cio, jp2->h, 4); /* HEIGHT */
- cio_write(cio, jp2->w, 4); /* WIDTH */
- cio_write(cio, jp2->numcomps, 2); /* NC */
+ cio_write(cio, jp2->h, 4); /* HEIGHT */
+ cio_write(cio, jp2->w, 4); /* WIDTH */
+ cio_write(cio, jp2->numcomps, 2); /* NC */
- cio_write(cio, jp2->bpc, 1); /* BPC */
+ cio_write(cio, jp2->bpc, 1); /* BPC */
- cio_write(cio, jp2->C, 1); /* C : Always 7 */
- cio_write(cio, jp2->UnkC, 1); /* UnkC, colorspace unknown */
- cio_write(cio, jp2->IPR, 1); /* IPR, no intellectual property */
+ cio_write(cio, jp2->C, 1); /* C : Always 7 */
+ cio_write(cio, jp2->UnkC, 1); /* UnkC, colorspace unknown */
+ cio_write(cio, jp2->IPR, 1); /* IPR, no intellectual property */
- box.length = cio_tell(cio) - box.init_pos;
- cio_seek(cio, box.init_pos);
- cio_write(cio, box.length, 4); /* L */
- cio_seek(cio, box.init_pos + box.length);
+ box.length = cio_tell(cio) - box.init_pos;
+ cio_seek(cio, box.init_pos);
+ cio_write(cio, box.length, 4); /* L */
+ cio_seek(cio, box.init_pos + box.length);
}
static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) {
- unsigned int i;
- opj_jp2_box_t box;
+ unsigned int i;
+ opj_jp2_box_t box;
- box.init_pos = cio_tell(cio);
- cio_skip(cio, 4);
- cio_write(cio, JP2_BPCC, 4); /* BPCC */
+ box.init_pos = cio_tell(cio);
+ cio_skip(cio, 4);
+ cio_write(cio, JP2_BPCC, 4); /* BPCC */
- for (i = 0; i < jp2->numcomps; i++) {
- cio_write(cio, jp2->comps[i].bpcc, 1);
- }
+ for (i = 0; i < jp2->numcomps; i++) {
+ cio_write(cio, jp2->comps[i].bpcc, 1);
+ }
- box.length = cio_tell(cio) - box.init_pos;
- cio_seek(cio, box.init_pos);
- cio_write(cio, box.length, 4); /* L */
- cio_seek(cio, box.init_pos + box.length);
+ box.length = cio_tell(cio) - box.init_pos;
+ cio_seek(cio, box.init_pos);
+ cio_write(cio, box.length, 4); /* L */
+ cio_seek(cio, box.init_pos + box.length);
}
static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) {
- unsigned int i;
- opj_jp2_box_t box;
+ unsigned int i;
+ opj_jp2_box_t box;
- opj_common_ptr cinfo = jp2->cinfo;
+ opj_common_ptr cinfo = jp2->cinfo;
- jp2_read_boxhdr(cinfo, cio, &box);
- if (JP2_BPCC != box.type) {
- opg_event_msg(cinfo, EVT_ERROR, "Expected BPCC Marker\n");
- return false;
- }
+ jp2_read_boxhdr(cinfo, cio, &box);
+ if (JP2_BPCC != box.type) {
+ opj_event_msg(cinfo, EVT_ERROR, "Expected BPCC Marker\n");
+ return false;
+ }
- for (i = 0; i < jp2->numcomps; i++) {
- jp2->comps[i].bpcc = cio_read(cio, 1);
- }
+ for (i = 0; i < jp2->numcomps; i++) {
+ jp2->comps[i].bpcc = cio_read(cio, 1);
+ }
- if (cio_tell(cio) - box.init_pos != box.length) {
- opg_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n");
- return false;
- }
+ if (cio_tell(cio) - box.init_pos != box.length) {
+ opj_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n");
+ return false;
+ }
- return true;
+ return true;
}
static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio) {
- opj_jp2_box_t box;
-
- box.init_pos = cio_tell(cio);
- cio_skip(cio, 4);
- cio_write(cio, JP2_COLR, 4); /* COLR */
-
- cio_write(cio, jp2->meth, 1); /* METH */
- cio_write(cio, jp2->precedence, 1); /* PRECEDENCE */
- cio_write(cio, jp2->approx, 1); /* APPROX */
-
- if (jp2->meth == 1) {
- cio_write(cio, jp2->enumcs, 4); /* EnumCS */
- } else {
- cio_write(cio, 0, 1); /* PROFILE (??) */
- }
-
- box.length = cio_tell(cio) - box.init_pos;
- cio_seek(cio, box.init_pos);
- cio_write(cio, box.length, 4); /* L */
- cio_seek(cio, box.init_pos + box.length);
+ opj_jp2_box_t box;
+
+ box.init_pos = cio_tell(cio);
+ cio_skip(cio, 4);
+ cio_write(cio, JP2_COLR, 4); /* COLR */
+
+ cio_write(cio, jp2->meth, 1); /* METH */
+ cio_write(cio, jp2->precedence, 1); /* PRECEDENCE */
+ cio_write(cio, jp2->approx, 1); /* APPROX */
+
+ if (jp2->meth == 1) {
+ cio_write(cio, jp2->enumcs, 4); /* EnumCS */
+ } else {
+ cio_write(cio, 0, 1); /* PROFILE (??) */
+ }
+
+ box.length = cio_tell(cio) - box.init_pos;
+ cio_seek(cio, box.init_pos);
+ cio_write(cio, box.length, 4); /* L */
+ cio_seek(cio, box.init_pos + box.length);
}
static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio) {
- opj_jp2_box_t box;
- int skip_len;
-
- opj_common_ptr cinfo = jp2->cinfo;
-
- jp2_read_boxhdr(cinfo, cio, &box);
- do {
- if (JP2_COLR != box.type) {
- cio_skip(cio, box.length - 8);
- jp2_read_boxhdr(cinfo, cio, &box);
- }
- } while(JP2_COLR != box.type);
-
- jp2->meth = cio_read(cio, 1); /* METH */
- jp2->precedence = cio_read(cio, 1); /* PRECEDENCE */
- jp2->approx = cio_read(cio, 1); /* APPROX */
-
- if (jp2->meth == 1) {
- jp2->enumcs = cio_read(cio, 4); /* EnumCS */
- } else {
- /* skip PROFILE */
- skip_len = box.init_pos + box.length - cio_tell(cio);
- if (skip_len < 0) {
- opg_event_msg(cinfo, EVT_ERROR, "Error with JP2H box size\n");
- return false;
- }
- cio_skip(cio, box.init_pos + box.length - cio_tell(cio));
- }
-
- if (cio_tell(cio) - box.init_pos != box.length) {
- opg_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n");
- return false;
- }
- return true;
+ opj_jp2_box_t box;
+ int skip_len;
+
+ opj_common_ptr cinfo = jp2->cinfo;
+
+ jp2_read_boxhdr(cinfo, cio, &box);
+ do {
+ if (JP2_COLR != box.type) {
+ cio_skip(cio, box.length - 8);
+ jp2_read_boxhdr(cinfo, cio, &box);
+ }
+ } while(JP2_COLR != box.type);
+
+ jp2->meth = cio_read(cio, 1); /* METH */
+ jp2->precedence = cio_read(cio, 1); /* PRECEDENCE */
+ jp2->approx = cio_read(cio, 1); /* APPROX */
+
+ if (jp2->meth == 1) {
+ jp2->enumcs = cio_read(cio, 4); /* EnumCS */
+ } else {
+ /* skip PROFILE */
+ skip_len = box.init_pos + box.length - cio_tell(cio);
+ if (skip_len < 0) {
+ opj_event_msg(cinfo, EVT_ERROR, "Error with JP2H box size\n");
+ return false;
+ }
+ cio_skip(cio, box.init_pos + box.length - cio_tell(cio));
+ }
+
+ if (cio_tell(cio) - box.init_pos != box.length) {
+ opj_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n");
+ return false;
+ }
+ return true;
}
static void jp2_write_jp2h(opj_jp2_t *jp2, opj_cio_t *cio) {
- opj_jp2_box_t box;
+ opj_jp2_box_t box;
- box.init_pos = cio_tell(cio);
- cio_skip(cio, 4);
- cio_write(cio, JP2_JP2H, 4); /* JP2H */
+ box.init_pos = cio_tell(cio);
+ cio_skip(cio, 4);
+ cio_write(cio, JP2_JP2H, 4); /* JP2H */
- jp2_write_ihdr(jp2, cio);
+ jp2_write_ihdr(jp2, cio);
- if (jp2->bpc == 255) {
- jp2_write_bpcc(jp2, cio);
- }
- jp2_write_colr(jp2, cio);
+ if (jp2->bpc == 255) {
+ jp2_write_bpcc(jp2, cio);
+ }
+ jp2_write_colr(jp2, cio);
- box.length = cio_tell(cio) - box.init_pos;
- cio_seek(cio, box.init_pos);
- cio_write(cio, box.length, 4); /* L */
- cio_seek(cio, box.init_pos + box.length);
+ box.length = cio_tell(cio) - box.init_pos;
+ cio_seek(cio, box.init_pos);
+ cio_write(cio, box.length, 4); /* L */
+ cio_seek(cio, box.init_pos + box.length);
}
static bool jp2_read_jp2h(opj_jp2_t *jp2, opj_cio_t *cio) {
- opj_jp2_box_t box;
- int skip_len;
-
- opj_common_ptr cinfo = jp2->cinfo;
-
- jp2_read_boxhdr(cinfo, cio, &box);
- do {
- if (JP2_JP2H != box.type) {
- if (box.type == JP2_JP2C) {
- opg_event_msg(cinfo, EVT_ERROR, "Expected JP2H Marker\n");
- return false;
- }
- cio_skip(cio, box.length - 8);
- jp2_read_boxhdr(cinfo, cio, &box);
- }
- } while(JP2_JP2H != box.type);
-
- if (!jp2_read_ihdr(jp2, cio))
- return false;
-
- if (jp2->bpc == 255) {
- if (!jp2_read_bpcc(jp2, cio))
- return false;
- }
- if (!jp2_read_colr(jp2, cio))
- return false;
-
- skip_len = box.init_pos + box.length - cio_tell(cio);
- if (skip_len < 0) {
- opg_event_msg(cinfo, EVT_ERROR, "Error with JP2H Box\n");
- return false;
- }
- cio_skip(cio, box.init_pos + box.length - cio_tell(cio));
-
- return true;
+ opj_jp2_box_t box;
+ int skip_len;
+
+ opj_common_ptr cinfo = jp2->cinfo;
+
+ jp2_read_boxhdr(cinfo, cio, &box);
+ do {
+ if (JP2_JP2H != box.type) {
+ if (box.type == JP2_JP2C) {
+ opj_event_msg(cinfo, EVT_ERROR, "Expected JP2H Marker\n");
+ return false;
+ }
+ cio_skip(cio, box.length - 8);
+ jp2_read_boxhdr(cinfo, cio, &box);
+ }
+ } while(JP2_JP2H != box.type);
+
+ if (!jp2_read_ihdr(jp2, cio))
+ return false;
+
+ if (jp2->bpc == 255) {
+ if (!jp2_read_bpcc(jp2, cio))
+ return false;
+ }
+ if (!jp2_read_colr(jp2, cio))
+ return false;
+
+ skip_len = box.init_pos + box.length - cio_tell(cio);
+ if (skip_len < 0) {
+ opj_event_msg(cinfo, EVT_ERROR, "Error with JP2H Box\n");
+ return false;
+ }
+ cio_skip(cio, box.init_pos + box.length - cio_tell(cio));
+
+ return true;
}
static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) {
- unsigned int i;
- opj_jp2_box_t box;
+ unsigned int i;
+ opj_jp2_box_t box;
- box.init_pos = cio_tell(cio);
- cio_skip(cio, 4);
- cio_write(cio, JP2_FTYP, 4); /* FTYP */
+ box.init_pos = cio_tell(cio);
+ cio_skip(cio, 4);
+ cio_write(cio, JP2_FTYP, 4); /* FTYP */
- cio_write(cio, jp2->brand, 4); /* BR */
- cio_write(cio, jp2->minversion, 4); /* MinV */
+ cio_write(cio, jp2->brand, 4); /* BR */
+ cio_write(cio, jp2->minversion, 4); /* MinV */
- for (i = 0; i < jp2->numcl; i++) {
- cio_write(cio, jp2->cl[i], 4); /* CL */
- }
+ for (i = 0; i < jp2->numcl; i++) {
+ cio_write(cio, jp2->cl[i], 4); /* CL */
+ }
- box.length = cio_tell(cio) - box.init_pos;
- cio_seek(cio, box.init_pos);
- cio_write(cio, box.length, 4); /* L */
- cio_seek(cio, box.init_pos + box.length);
+ box.length = cio_tell(cio) - box.init_pos;
+ cio_seek(cio, box.init_pos);
+ cio_write(cio, box.length, 4); /* L */
+ cio_seek(cio, box.init_pos + box.length);
}
static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) {
- int i;
- opj_jp2_box_t box;
+ int i;
+ opj_jp2_box_t box;
- opj_common_ptr cinfo = jp2->cinfo;
+ opj_common_ptr cinfo = jp2->cinfo;
- jp2_read_boxhdr(cinfo, cio, &box);
+ jp2_read_boxhdr(cinfo, cio, &box);
- if (JP2_FTYP != box.type) {
- opg_event_msg(cinfo, EVT_ERROR, "Expected FTYP Marker\n");
- return false;
- }
+ if (JP2_FTYP != box.type) {
+ opj_event_msg(cinfo, EVT_ERROR, "Expected FTYP Marker\n");
+ return false;
+ }
- jp2->brand = cio_read(cio, 4); /* BR */
- jp2->minversion = cio_read(cio, 4); /* MinV */
- jp2->numcl = (box.length - 16) / 4;
- jp2->cl = (unsigned int *) opj_malloc(jp2->numcl * sizeof(unsigned int));
+ jp2->brand = cio_read(cio, 4); /* BR */
+ jp2->minversion = cio_read(cio, 4); /* MinV */
+ jp2->numcl = (box.length - 16) / 4;
+ jp2->cl = (unsigned int *) opj_malloc(jp2->numcl * sizeof(unsigned int));
- for (i = 0; i < (int)jp2->numcl; i++) {
- jp2->cl[i] = cio_read(cio, 4); /* CLi */
- }
+ for (i = 0; i < (int)jp2->numcl; i++) {
+ jp2->cl[i] = cio_read(cio, 4); /* CLi */
+ }
- if (cio_tell(cio) - box.init_pos != box.length) {
- opg_event_msg(cinfo, EVT_ERROR, "Error with FTYP Box\n");
- return false;
- }
+ if (cio_tell(cio) - box.init_pos != box.length) {
+ opj_event_msg(cinfo, EVT_ERROR, "Error with FTYP Box\n");
+ return false;
+ }
- return true;
+ return true;
}
static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, char *index) {
- unsigned int j2k_codestream_offset, j2k_codestream_length;
- opj_jp2_box_t box;
+ unsigned int j2k_codestream_offset, j2k_codestream_length;
+ opj_jp2_box_t box;
- opj_j2k_t *j2k = jp2->j2k;
- opj_image_t *image = jp2->image;
+ opj_j2k_t *j2k = jp2->j2k;
+ opj_image_t *image = jp2->image;
- box.init_pos = cio_tell(cio);
- cio_skip(cio, 4);
- cio_write(cio, JP2_JP2C, 4); /* JP2C */
+ box.init_pos = cio_tell(cio);
+ cio_skip(cio, 4);
+ cio_write(cio, JP2_JP2C, 4); /* JP2C */
- /* J2K encoding */
- j2k_codestream_offset = cio_tell(cio);
- if(!j2k_encode(j2k, cio, image, index)) {
- opg_event_msg(j2k->cinfo, EVT_ERROR, "Failed to encode image\n");
- return 0;
- }
- j2k_codestream_length = cio_tell(cio) - j2k_codestream_offset;
+ /* J2K encoding */
+ j2k_codestream_offset = cio_tell(cio);
+ if(!j2k_encode(j2k, cio, image, index)) {
+ opj_event_msg(j2k->cinfo, EVT_ERROR, "Failed to encode image\n");
+ return 0;
+ }
+ j2k_codestream_length = cio_tell(cio) - j2k_codestream_offset;
- jp2->j2k_codestream_offset = j2k_codestream_offset;
- jp2->j2k_codestream_length = j2k_codestream_length;
+ jp2->j2k_codestream_offset = j2k_codestream_offset;
+ jp2->j2k_codestream_length = j2k_codestream_length;
- box.length = 8 + jp2->j2k_codestream_length;
- cio_seek(cio, box.init_pos);
- cio_write(cio, box.length, 4); /* L */
- cio_seek(cio, box.init_pos + box.length);
+ box.length = 8 + jp2->j2k_codestream_length;
+ cio_seek(cio, box.init_pos);
+ cio_write(cio, box.length, 4); /* L */
+ cio_seek(cio, box.init_pos + box.length);
- return box.length;
+ return box.length;
}
static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset) {
- opj_jp2_box_t box;
+ opj_jp2_box_t box;
- opj_common_ptr cinfo = jp2->cinfo;
+ opj_common_ptr cinfo = jp2->cinfo;
- jp2_read_boxhdr(cinfo, cio, &box);
- do {
- if(JP2_JP2C != box.type) {
- cio_skip(cio, box.length - 8);
- jp2_read_boxhdr(cinfo, cio, &box);
- }
- } while(JP2_JP2C != box.type);
+ jp2_read_boxhdr(cinfo, cio, &box);
+ do {
+ if(JP2_JP2C != box.type) {
+ cio_skip(cio, box.length - 8);
+ jp2_read_boxhdr(cinfo, cio, &box);
+ }
+ } while(JP2_JP2C != box.type);
- *j2k_codestream_offset = cio_tell(cio);
- *j2k_codestream_length = box.length - 8;
+ *j2k_codestream_offset = cio_tell(cio);
+ *j2k_codestream_length = box.length - 8;
- return true;
+ return true;
}
static void jp2_write_jp(opj_cio_t *cio) {
- opj_jp2_box_t box;
+ opj_jp2_box_t box;
- box.init_pos = cio_tell(cio);
- cio_skip(cio, 4);
- cio_write(cio, JP2_JP, 4); /* JP2 signature */
- cio_write(cio, 0x0d0a870a, 4);
+ box.init_pos = cio_tell(cio);
+ cio_skip(cio, 4);
+ cio_write(cio, JP2_JP, 4); /* JP2 signature */
+ cio_write(cio, 0x0d0a870a, 4);
- box.length = cio_tell(cio) - box.init_pos;
- cio_seek(cio, box.init_pos);
- cio_write(cio, box.length, 4); /* L */
- cio_seek(cio, box.init_pos + box.length);
+ box.length = cio_tell(cio) - box.init_pos;
+ cio_seek(cio, box.init_pos);
+ cio_write(cio, box.length, 4); /* L */
+ cio_seek(cio, box.init_pos + box.length);
}
static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio) {
- opj_jp2_box_t box;
-
- opj_common_ptr cinfo = jp2->cinfo;
-
- jp2_read_boxhdr(cinfo, cio, &box);
- if (JP2_JP != box.type) {
- opg_event_msg(cinfo, EVT_ERROR, "Expected JP Marker\n");
- return false;
- }
- if (0x0d0a870a != cio_read(cio, 4)) {
- opg_event_msg(cinfo, EVT_ERROR, "Error with JP Marker\n");
- return false;
- }
- if (cio_tell(cio) - box.init_pos != box.length) {
- opg_event_msg(cinfo, EVT_ERROR, "Error with JP Box size\n");
- return false;
- }
-
- return true;
+ opj_jp2_box_t box;
+
+ opj_common_ptr cinfo = jp2->cinfo;
+
+ jp2_read_boxhdr(cinfo, cio, &box);
+ if (JP2_JP != box.type) {
+ opj_event_msg(cinfo, EVT_ERROR, "Expected JP Marker\n");
+ return false;
+ }
+ if (0x0d0a870a != cio_read(cio, 4)) {
+ opj_event_msg(cinfo, EVT_ERROR, "Error with JP Marker\n");
+ return false;
+ }
+ if (cio_tell(cio) - box.init_pos != box.length) {
+ opj_event_msg(cinfo, EVT_ERROR, "Error with JP Box size\n");
+ return false;
+ }
+
+ return true;
}
static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio) {
- if (!jp2_read_jp(jp2, cio))
- return false;
- if (!jp2_read_ftyp(jp2, cio))
- return false;
- if (!jp2_read_jp2h(jp2, cio))
- return false;
- if (!jp2_read_jp2c(jp2, cio, &jp2->j2k_codestream_length, &jp2->j2k_codestream_offset))
- return false;
-
- return true;
+ if (!jp2_read_jp(jp2, cio))
+ return false;
+ if (!jp2_read_ftyp(jp2, cio))
+ return false;
+ if (!jp2_read_jp2h(jp2, cio))
+ return false;
+ if (!jp2_read_jp2c(jp2, cio, &jp2->j2k_codestream_length, &jp2->j2k_codestream_offset))
+ return false;
+
+ return true;
}
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
opj_jp2_t* jp2_create_decompress(opj_common_ptr cinfo) {
- opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t));
- if(jp2) {
- jp2->cinfo = cinfo;
- /* create the J2K codec */
- jp2->j2k = j2k_create_decompress(cinfo);
- if(jp2->j2k == NULL) {
- jp2_destroy_decompress(jp2);
- return NULL;
- }
- }
- return jp2;
+ opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t));
+ if(jp2) {
+ jp2->cinfo = cinfo;
+ /* create the J2K codec */
+ jp2->j2k = j2k_create_decompress(cinfo);
+ if(jp2->j2k == NULL) {
+ jp2_destroy_decompress(jp2);
+ return NULL;
+ }
+ }
+ return jp2;
}
void jp2_destroy_decompress(opj_jp2_t *jp2) {
- if(jp2) {
- /* destroy the J2K codec */
- j2k_destroy_decompress(jp2->j2k);
-
- if(jp2->comps) {
- opj_free(jp2->comps);
- }
- if(jp2->cl) {
- opj_free(jp2->cl);
- }
- opj_free(jp2);
- }
+ if(jp2) {
+ /* destroy the J2K codec */
+ j2k_destroy_decompress(jp2->j2k);
+
+ if(jp2->comps) {
+ opj_free(jp2->comps);
+ }
+ if(jp2->cl) {
+ opj_free(jp2->cl);
+ }
+ opj_free(jp2);
+ }
}
void jp2_setup_decoder(opj_jp2_t *jp2, opj_dparameters_t *parameters) {
- /* setup the J2K codec */
- j2k_setup_decoder(jp2->j2k, parameters);
- /* further JP2 initializations go here */
+ /* setup the J2K codec */
+ j2k_setup_decoder(jp2->j2k, parameters);
+ /* further JP2 initializations go here */
}
opj_image_t* jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio) {
- opj_common_ptr cinfo;
- opj_image_t *image = NULL;
+ opj_common_ptr cinfo;
+ opj_image_t *image = NULL;
- if(!jp2 || !cio) {
- return NULL;
- }
+ if(!jp2 || !cio) {
+ return NULL;
+ }
- cinfo = jp2->cinfo;
+ cinfo = jp2->cinfo;
- /* JP2 decoding */
- if(!jp2_read_struct(jp2, cio)) {
- opg_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n");
- return NULL;
- }
+ /* JP2 decoding */
+ if(!jp2_read_struct(jp2, cio)) {
+ opj_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n");
+ return NULL;
+ }
- /* J2K decoding */
- image = j2k_decode(jp2->j2k, cio);
- if(!image) {
- opg_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n");
- }
+ /* J2K decoding */
+ image = j2k_decode(jp2->j2k, cio);
+ if(!image) {
+ opj_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n");
+ }
- return image;
+ return image;
}
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
opj_jp2_t* jp2_create_compress(opj_common_ptr cinfo) {
- opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t));
- if(jp2) {
- jp2->cinfo = cinfo;
- /* create the J2K codec */
- jp2->j2k = j2k_create_compress(cinfo);
- if(jp2->j2k == NULL) {
- jp2_destroy_compress(jp2);
- return NULL;
- }
- }
- return jp2;
+ opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t));
+ if(jp2) {
+ jp2->cinfo = cinfo;
+ /* create the J2K codec */
+ jp2->j2k = j2k_create_compress(cinfo);
+ if(jp2->j2k == NULL) {
+ jp2_destroy_compress(jp2);
+ return NULL;
+ }
+ }
+ return jp2;
}
void jp2_destroy_compress(opj_jp2_t *jp2) {
- if(jp2) {
- /* destroy the J2K codec */
- j2k_destroy_compress(jp2->j2k);
-
- if(jp2->comps) {
- opj_free(jp2->comps);
- }
- if(jp2->cl) {
- opj_free(jp2->cl);
- }
- opj_free(jp2);
- }
+ if(jp2) {
+ /* destroy the J2K codec */
+ j2k_destroy_compress(jp2->j2k);
+
+ if(jp2->comps) {
+ opj_free(jp2->comps);
+ }
+ if(jp2->cl) {
+ opj_free(jp2->cl);
+ }
+ opj_free(jp2);
+ }
}
void jp2_setup_encoder(opj_jp2_t *jp2, opj_cparameters_t *parameters, opj_image_t *image) {
- int i;
- int depth_0, sign;
-
- if(!jp2 || !parameters || !image)
- return;
-
- /* setup the J2K codec */
- /* ------------------- */
-
- j2k_setup_encoder(jp2->j2k, parameters, image);
-
- /* setup the JP2 codec */
- /* ------------------- */
-
- /* Profile box */
-
- jp2->brand = JP2_JP2; /* BR */
- jp2->minversion = 0; /* MinV */
- jp2->numcl = 1;
- jp2->cl = (unsigned int*) opj_malloc(jp2->numcl * sizeof(unsigned int));
- jp2->cl[0] = JP2_JP2; /* CL0 : JP2 */
-
- /* Image Header box */
-
- jp2->image = image;
-
- jp2->numcomps = image->numcomps; /* NC */
- jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t));
- jp2->h = image->y1 - image->y0; /* HEIGHT */
- jp2->w = image->x1 - image->x0; /* WIDTH */
- /* BPC */
- depth_0 = image->comps[0].prec - 1;
- sign = image->comps[0].sgnd;
- jp2->bpc = depth_0 + (sign << 7);
- for (i = 1; i < image->numcomps; i++) {
- int depth = image->comps[i].prec - 1;
- sign = image->comps[i].sgnd;
- if (depth_0 != depth)
- jp2->bpc = 255;
- }
- jp2->C = 7; /* C : Always 7 */
- jp2->UnkC = 0; /* UnkC, colorspace specified in colr box */
- jp2->IPR = 0; /* IPR, no intellectual property */
-
- /* BitsPerComponent box */
-
- for (i = 0; i < image->numcomps; i++) {
- jp2->comps[i].bpcc = image->comps[i].prec - 1 + (image->comps[i].sgnd << 7);
- }
-
- /* Colour Specification box */
-
- if ((image->numcomps == 1 || image->numcomps == 3) && (jp2->bpc != 255)) {
- jp2->meth = 1; /* METH: Enumerated colourspace */
- } else {
- jp2->meth = 2; /* METH: Restricted ICC profile */
- }
- if (jp2->meth == 1) {
- if (image->color_space == 1)
- jp2->enumcs = 16; /* sRGB as defined by IEC 61966�2�1 */
- else if (image->color_space == 2)
- jp2->enumcs = 17; /* greyscale */
- else if (image->color_space == 3)
- jp2->enumcs = 18; /* YUV */
- } else {
- jp2->enumcs = 0; /* PROFILE (??) */
- }
- jp2->precedence = 0; /* PRECEDENCE */
- jp2->approx = 0; /* APPROX */
+ int i;
+ int depth_0, sign;
+
+ if(!jp2 || !parameters || !image)
+ return;
+
+ /* setup the J2K codec */
+ /* ------------------- */
+
+ j2k_setup_encoder(jp2->j2k, parameters, image);
+
+ /* setup the JP2 codec */
+ /* ------------------- */
+
+ /* Profile box */
+
+ jp2->brand = JP2_JP2; /* BR */
+ jp2->minversion = 0; /* MinV */
+ jp2->numcl = 1;
+ jp2->cl = (unsigned int*) opj_malloc(jp2->numcl * sizeof(unsigned int));
+ jp2->cl[0] = JP2_JP2; /* CL0 : JP2 */
+
+ /* Image Header box */
+
+ jp2->image = image;
+
+ jp2->numcomps = image->numcomps; /* NC */
+ jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t));
+ jp2->h = image->y1 - image->y0; /* HEIGHT */
+ jp2->w = image->x1 - image->x0; /* WIDTH */
+ /* BPC */
+ depth_0 = image->comps[0].prec - 1;
+ sign = image->comps[0].sgnd;
+ jp2->bpc = depth_0 + (sign << 7);
+ for (i = 1; i < image->numcomps; i++) {
+ int depth = image->comps[i].prec - 1;
+ sign = image->comps[i].sgnd;
+ if (depth_0 != depth)
+ jp2->bpc = 255;
+ }
+ jp2->C = 7; /* C : Always 7 */
+ jp2->UnkC = 0; /* UnkC, colorspace specified in colr box */
+ jp2->IPR = 0; /* IPR, no intellectual property */
+
+ /* BitsPerComponent box */
+
+ for (i = 0; i < image->numcomps; i++) {
+ jp2->comps[i].bpcc = image->comps[i].prec - 1 + (image->comps[i].sgnd << 7);
+ }
+
+ /* Colour Specification box */
+
+ if ((image->numcomps == 1 || image->numcomps == 3) && (jp2->bpc != 255)) {
+ jp2->meth = 1; /* METH: Enumerated colourspace */
+ } else {
+ jp2->meth = 2; /* METH: Restricted ICC profile */
+ }
+ if (jp2->meth == 1) {
+ if (image->color_space == 1)
+ jp2->enumcs = 16; /* sRGB as defined by IEC 61966�2�1 */
+ else if (image->color_space == 2)
+ jp2->enumcs = 17; /* greyscale */
+ else if (image->color_space == 3)
+ jp2->enumcs = 18; /* YUV */
+ } else {
+ jp2->enumcs = 0; /* PROFILE (??) */
+ }
+ jp2->precedence = 0; /* PRECEDENCE */
+ jp2->approx = 0; /* APPROX */
}
bool jp2_encode(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, char *index) {
- /* JP2 encoding */
+ /* JP2 encoding */
- /* JPEG 2000 Signature box */
- jp2_write_jp(cio);
- /* File Type box */
- jp2_write_ftyp(jp2, cio);
- /* JP2 Header box */
- jp2_write_jp2h(jp2, cio);
+ /* JPEG 2000 Signature box */
+ jp2_write_jp(cio);
+ /* File Type box */
+ jp2_write_ftyp(jp2, cio);
+ /* JP2 Header box */
+ jp2_write_jp2h(jp2, cio);
- /* J2K encoding */
+ /* J2K encoding */
- if(!jp2_write_jp2c(jp2, cio, index)) {
- opg_event_msg(jp2->cinfo, EVT_ERROR, "Failed to encode image\n");
- return false;
- }
+ if(!jp2_write_jp2c(jp2, cio, index)) {
+ opj_event_msg(jp2->cinfo, EVT_ERROR, "Failed to encode image\n");
+ return false;
+ }
- return true;
+ return true;
}
projects / openjpeg.git / blobdiff