walkero
/
openjpeg
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity
openjpeg/libopenjpeg/jp2.c

2604 lines
70 KiB
C
Raw Blame History

/*
* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2007, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* Copyright (c) 2010-2011, Kaori Hagihara
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "opj_includes.h"
/** @defgroup JP2 JP2 - JPEG-2000 file format reader/writer */
/*@{*/
#define BOX_SIZE 1024
/** @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 opj_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 opj_bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio);
/**
* Reads a IHDR box - Image Header box
*
* @param p_image_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_image_header_size the size of the image header
* @param p_manager the user event manager.
*
* @return true if the image header is valid, fale else.
*/
static opj_bool jp2_read_ihdr_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_image_header_data,
unsigned int p_image_header_size,
struct opj_event_mgr * p_manager
);
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 opj_bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio);
/**
* Reads a Bit per Component box.
*
* @param p_bpc_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_bpc_header_size the size of the bpc header
* @param p_manager the user event manager.
*
* @return true if the bpc header is valid, fale else.
*/
static opj_bool jp2_read_bpcc_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_bpc_header_data,
unsigned int p_bpc_header_size,
struct opj_event_mgr * p_manager
);
static opj_bool jp2_read_cdef_v2( opj_jp2_v2_t * jp2,
unsigned char * p_cdef_header_data,
OPJ_UINT32 p_cdef_header_size,
opj_event_mgr_t * p_manager
);
static void jp2_write_colr(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 opj_bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio);
/**
* Reads a a FTYP box - File type box
*
* @param p_header_data the data contained in the FTYP box.
* @param jp2 the jpeg2000 file codec.
* @param p_header_size the size of the data contained in the FTYP box.
* @param p_manager the user event manager.
*
* @return true if the FTYP box is valid.
*/
static opj_bool jp2_read_ftyp_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_header_data,
unsigned int p_header_size,
struct opj_event_mgr * p_manager
);
/**
* Reads the Jpeg2000 file Header box - JP2 Header box (warning, this is a super box).
*
* @param p_header_data the data contained in the file header box.
* @param jp2 the jpeg2000 file codec.
* @param p_header_size the size of the data contained in the file header box.
* @param p_manager the user event manager.
*
* @return true if the JP2 Header box was successfully reconized.
*/
static opj_bool jp2_read_jp2h_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_header_data,
unsigned int p_header_size,
struct opj_event_mgr * p_manager
);
static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info);
static opj_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 opj_bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio);
/**
* Reads a jpeg2000 file signature box.
*
* @param p_header_data the data contained in the signature box.
* @param jp2 the jpeg2000 file codec.
* @param p_header_size the size of the data contained in the signature box.
* @param p_manager the user event manager.
*
* @return true if the file signature box is valid.
*/
static opj_bool jp2_read_jp_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_header_data,
unsigned int p_header_size,
struct opj_event_mgr * p_manager
);
/**
Decode the structure of a JP2 file
@param jp2 JP2 handle
@param cio Input buffer stream
@param color Collector for profile, cdef and pclr data
@return Returns true if successful, returns false otherwise
*/
static opj_bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_color_t *color);
/**
Apply collected palette data
@param color Collector for profile, cdef and pclr data
@param image
*/
static void jp2_apply_pclr(opj_jp2_color_t *color, opj_image_t *image);
/**
Collect palette data
@param jp2 JP2 handle
@param cio Input buffer stream
@param box
@param color Collector for profile, cdef and pclr data
@return Returns true if successful, returns false otherwise
*/
static opj_bool jp2_read_pclr(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_box_t *box, opj_jp2_color_t *color);
static opj_bool jp2_read_pclr_v2( opj_jp2_v2_t *jp2,
unsigned char * p_pclr_header_data,
OPJ_UINT32 p_pclr_header_size,
opj_event_mgr_t * p_manager
);
/**
Collect component mapping data
@param jp2 JP2 handle
@param cio Input buffer stream
@param box
@param color Collector for profile, cdef and pclr data
@return Returns true if successful, returns false otherwise
*/
static opj_bool jp2_read_cmap(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_box_t *box, opj_jp2_color_t *color);
static opj_bool jp2_read_cmap_v2( opj_jp2_v2_t * jp2,
unsigned char * p_cmap_header_data,
OPJ_UINT32 p_cmap_header_size,
opj_event_mgr_t * p_manager
);
/**
Collect colour specification data
@param jp2 JP2 handle
@param cio Input buffer stream
@param box
@param color Collector for profile, cdef and pclr data
@return Returns true if successful, returns false otherwise
*/
static opj_bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_box_t *box, opj_jp2_color_t *color);
/**
* Reads the Color Specification box.
*
* @param p_colr_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_colr_header_size the size of the color header
* @param p_manager the user event manager.
*
* @return true if the bpc header is valid, fale else.
*/
static opj_bool jp2_read_colr_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_colr_header_data,
OPJ_UINT32 p_colr_header_size,
struct opj_event_mgr * p_manager
);
/**
Write file Index (superbox)
@param[in] offset_jp2c offset of jp2c box
@param[in] length_jp2c length of jp2c box
@param[in] offset_idx offset of cidx box
@param[in] length_idx length of cidx box
@param[in] cio file output handle
@return length of fidx box
*/
static int write_fidx( int offset_jp2c, int length_jp2c, int offset_idx, int length_idx, opj_cio_t *cio);
/**
Write index Finder box
@param[in] offset offset of fidx box
@param[in] length length of fidx box
@param[in] cio file output handle
*/
static void write_iptr( int offset, int length, opj_cio_t *cio);
/**
Write proxy box
@param[in] offset_jp2c offset of jp2c box
@param[in] length_jp2c length of jp2c box
@param[in] offset_idx offset of cidx box
@param[in] length_idx length of cidx box
@param[in] cio file output handle
*/
static void write_prxy( int offset_jp2c, int length_jp2c, int offset_idx, int length_idx, opj_cio_t *cio);
/*@}*/
/*@}*/
/**
* Sets up the procedures to do on reading header after the codestream.
* Developpers wanting to extend the library can add their own writting procedures.
*/
static void jp2_setup_end_header_reading (opj_jp2_v2_t *jp2);
/**
* Reads a jpeg2000 file header structure.
*
* @param cio the stream to read data from.
* @param jp2 the jpeg2000 file header structure.
* @param p_manager the user event manager.
*
* @return true if the box is valid.
*/
opj_bool jp2_read_header_procedure(
opj_jp2_v2_t *jp2,
struct opj_stream_private *cio,
struct opj_event_mgr * p_manager
);
/**
* Excutes the given procedures on the given codec.
*
* @param p_procedure_list the list of procedures to execute
* @param jp2 the jpeg2000 file codec to execute the procedures on.
* @param cio the stream to execute the procedures on.
* @param p_manager the user manager.
*
* @return true if all the procedures were successfully executed.
*/
static opj_bool jp2_exec (
opj_jp2_v2_t * jp2,
struct opj_procedure_list * p_procedure_list,
struct opj_stream_private *cio,
struct opj_event_mgr * p_manager
);
/**
* Reads a box header. The box is the way data is packed inside a jpeg2000 file structure.
*
* @param cio the input stream to read data from.
* @param box the box structure to fill.
* @param p_number_bytes_read pointer to an int that will store the number of bytes read from the stream (shoul usually be 2).
* @param p_manager user event manager.
*
* @return true if the box is reconized, false otherwise
*/
static opj_bool jp2_read_boxhdr_v2(
opj_jp2_box_t *box,
OPJ_UINT32 * p_number_bytes_read,
struct opj_stream_private *cio,
struct opj_event_mgr * p_manager
);
/**
* Finds the execution function related to the given box id.
*
* @param p_id the id of the handler to fetch.
*
* @return the given handler or NULL if it could not be found.
*/
static const opj_jp2_header_handler_t * jp2_find_handler (int p_id );
/**
* Finds the image execution function related to the given box id.
*
* @param p_id the id of the handler to fetch.
*
* @return the given handler or NULL if it could not be found.
*/
static const opj_jp2_header_handler_t * jp2_img_find_handler (int p_id);
const opj_jp2_header_handler_t jp2_header [] =
{
{JP2_JP,jp2_read_jp_v2},
{JP2_FTYP,jp2_read_ftyp_v2},
{JP2_JP2H,jp2_read_jp2h_v2}
};
const opj_jp2_header_handler_t jp2_img_header [] =
{
{JP2_IHDR,jp2_read_ihdr_v2},
{JP2_COLR,jp2_read_colr_v2},
{JP2_BPCC,jp2_read_bpcc_v2},
{JP2_PCLR,jp2_read_pclr_v2},
{JP2_CMAP,jp2_read_cmap_v2},
{JP2_CDEF,jp2_read_cdef_v2}
};
/**
* Reads a box header. The box is the way data is packed inside a jpeg2000 file structure. Data is read from a character string
*
* @param p_data the character string to read data from.
* @param box the box structure to fill.
* @param p_number_bytes_read pointer to an int that will store the number of bytes read from the stream (shoul usually be 2).
* @param p_box_max_size the maximum number of bytes in the box.
*
* @return true if the box is reconized, false otherwise
*/
static opj_bool jp2_read_boxhdr_char(
opj_jp2_box_t *box,
OPJ_BYTE * p_data,
OPJ_UINT32 * p_number_bytes_read,
OPJ_UINT32 p_box_max_size,
struct opj_event_mgr * p_manager
);
/**
* Sets up the validation ,i.e. adds the procedures to lauch to make sure the codec parameters
* are valid. Developpers wanting to extend the library can add their own validation procedures.
*/
static void jp2_setup_decoding_validation (opj_jp2_v2_t *jp2);
/**
* Sets up the procedures to do on reading header.
* Developpers wanting to extend the library can add their own writting procedures.
*/
static void jp2_setup_header_reading (opj_jp2_v2_t *jp2);
/* ----------------------------------------------------------------------- */
static opj_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) {
opj_event_msg(cinfo, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n");
return OPJ_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 OPJ_TRUE;
}
/**
* Reads a box header. The box is the way data is packed inside a jpeg2000 file structure.
*
* @param cio the input stream to read data from.
* @param box the box structure to fill.
* @param p_number_bytes_read pointer to an int that will store the number of bytes read from the stream (should usually be 8).
* @param p_manager user event manager.
*
* @return true if the box is reconized, false otherwise
*/
opj_bool jp2_read_boxhdr_v2(opj_jp2_box_t *box, OPJ_UINT32 * p_number_bytes_read, opj_stream_private_t *cio, opj_event_mgr_t * p_manager)
{
/* read header from file */
unsigned char l_data_header [8];
// preconditions
assert(cio != 00);
assert(box != 00);
assert(p_number_bytes_read != 00);
assert(p_manager != 00);
*p_number_bytes_read = opj_stream_read_data(cio,l_data_header,8,p_manager);
if (*p_number_bytes_read != 8) {
return OPJ_FALSE;
}
/* process read data */
opj_read_bytes(l_data_header,&(box->length), 4);
opj_read_bytes(l_data_header+4,&(box->type), 4);
// do we have a "special very large box ?"
// read then the XLBox
if (box->length == 1) {
OPJ_UINT32 l_xl_part_size;
OPJ_UINT32 l_nb_bytes_read = opj_stream_read_data(cio,l_data_header,8,p_manager);
if (l_nb_bytes_read != 8) {
if (l_nb_bytes_read > 0) {
*p_number_bytes_read += l_nb_bytes_read;
}
return OPJ_FALSE;
}
opj_read_bytes(l_data_header,&l_xl_part_size, 4);
if (l_xl_part_size != 0) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n");
return OPJ_FALSE;
}
opj_read_bytes(l_data_header,&(box->length), 4);
}
return OPJ_TRUE;
}
#if 0
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);
}
#endif
static opj_bool jp2_read_ihdr(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_IHDR != box.type) {
opj_event_msg(cinfo, EVT_ERROR, "Expected IHDR Marker\n");
return OPJ_FALSE;
}
jp2->h = cio_read(cio, 4); /* HEIGHT */
jp2->w = cio_read(cio, 4); /* WIDTH */
jp2->numcomps = cio_read(cio, 2); /* NC */
jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t));
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 */
if (cio_tell(cio) - box.init_pos != box.length) {
opj_event_msg(cinfo, EVT_ERROR, "Error with IHDR Box\n");
return OPJ_FALSE;
}
return OPJ_TRUE;
}
/**
* Reads a IHDR box - Image Header box
*
* @param p_image_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_image_header_size the size of the image header
* @param p_image_header_max_size maximum size of the header, any size bigger than this value should result the function to output false.
* @param p_manager the user event manager.
*
* @return true if the image header is valid, fale else.
*/
opj_bool jp2_read_ihdr_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_image_header_data,
unsigned int p_image_header_size,
opj_event_mgr_t * p_manager
)
{
// preconditions
assert(p_image_header_data != 00);
assert(jp2 != 00);
assert(p_manager != 00);
if (p_image_header_size != 14) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Bad image header box (bad size)\n");
return OPJ_FALSE;
}
opj_read_bytes(p_image_header_data,&(jp2->h),4); /* HEIGHT */
p_image_header_data += 4;
opj_read_bytes(p_image_header_data,&(jp2->w),4); /* WIDTH */
p_image_header_data += 4;
opj_read_bytes(p_image_header_data,&(jp2->numcomps),2); /* NC */
p_image_header_data += 2;
/* allocate memory for components */
jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t));
if (jp2->comps == 0) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Not enough memory to handle image header (ihdr)\n");
return OPJ_FALSE;
}
memset(jp2->comps,0,jp2->numcomps * sizeof(opj_jp2_comps_t));
opj_read_bytes(p_image_header_data,&(jp2->bpc),1); /* BPC */
++ p_image_header_data;
// if equal to 0 then need a BPC box (cf. chapter about image header box of the norm)
/*if (jp2->bpc == 0){
// indicate with a flag that we will wait a BPC box
}*/
opj_read_bytes(p_image_header_data,&(jp2->C),1); /* C */
++ p_image_header_data;
// Should be equal to 7 cf. chapter about image header box of the norm
if (jp2->C != 7){
opj_event_msg_v2(p_manager, EVT_INFO, "JP2 IHDR box: compression type indicate that the file is not a conforming JP2 file (%d) \n", jp2->C);
}
opj_read_bytes(p_image_header_data,&(jp2->UnkC),1); /* UnkC */
++ p_image_header_data;
opj_read_bytes(p_image_header_data,&(jp2->IPR),1); /* IPR */
++ p_image_header_data;
return OPJ_TRUE;
}
static void jp2_write_ihdr(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_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->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 */
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;
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);
}
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 opj_bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) {
unsigned int i;
opj_jp2_box_t box;
opj_common_ptr cinfo = jp2->cinfo;
jp2_read_boxhdr(cinfo, cio, &box);
if (JP2_BPCC != box.type) {
opj_event_msg(cinfo, EVT_ERROR, "Expected BPCC Marker\n");
return OPJ_FALSE;
}
for (i = 0; i < jp2->numcomps; i++) {
jp2->comps[i].bpcc = cio_read(cio, 1);
}
if (cio_tell(cio) - box.init_pos != box.length) {
opj_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n");
return OPJ_FALSE;
}
return OPJ_TRUE;
}
/**
* Reads a Bit per Component box.
*
* @param p_bpc_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_bpc_header_size pointer that will hold the size of the bpc header
* @param p_bpc_header_max_size maximum size of the header, any size bigger than this value should result the function to output false.
* @param p_manager the user event manager.
*
* @return true if the bpc header is valid, fale else.
*/
opj_bool jp2_read_bpcc_v2( opj_jp2_v2_t *jp2,
unsigned char * p_bpc_header_data,
unsigned int p_bpc_header_size,
opj_event_mgr_t * p_manager
)
{
OPJ_UINT32 i;
// preconditions
assert(p_bpc_header_data != 00);
assert(jp2 != 00);
assert(p_manager != 00);
// TODO MSD
/*if (jp2->bpc != 0 ){
opj_event_msg_v2(p_manager, EVT_WARNING, "A BPCC header box is available although BPC is different to zero (%d)\n",jp2->bpc);
}*/
// and length is relevant
if (p_bpc_header_size != jp2->numcomps) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Bad BPCC header box (bad size)\n");
return OPJ_FALSE;
}
// read info for each component
for (i = 0; i < jp2->numcomps; ++i) {
opj_read_bytes(p_bpc_header_data,&jp2->comps[i].bpcc ,1); /* read each BPCC component */
++p_bpc_header_data;
}
return OPJ_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 == 2)
jp2->enumcs = 0;
cio_write(cio, jp2->enumcs, 4); /* EnumCS */
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_free_pclr(opj_jp2_color_t *color)
{
opj_free(color->jp2_pclr->channel_sign);
opj_free(color->jp2_pclr->channel_size);
opj_free(color->jp2_pclr->entries);
if(color->jp2_pclr->cmap) opj_free(color->jp2_pclr->cmap);
opj_free(color->jp2_pclr); color->jp2_pclr = NULL;
}
static void free_color_data(opj_jp2_color_t *color)
{
if(color->jp2_pclr)
{
jp2_free_pclr(color);
}
if(color->jp2_cdef)
{
if(color->jp2_cdef->info) opj_free(color->jp2_cdef->info);
opj_free(color->jp2_cdef);
}
if(color->icc_profile_buf) opj_free(color->icc_profile_buf);
}
static void jp2_apply_pclr(opj_jp2_color_t *color, opj_image_t *image)
{
opj_image_comp_t *old_comps, *new_comps;
unsigned char *channel_size, *channel_sign;
unsigned int *entries;
opj_jp2_cmap_comp_t *cmap;
int *src, *dst;
unsigned int j, max;
unsigned short i, nr_channels, cmp, pcol;
int k, top_k;
channel_size = color->jp2_pclr->channel_size;
channel_sign = color->jp2_pclr->channel_sign;
entries = color->jp2_pclr->entries;
cmap = color->jp2_pclr->cmap;
nr_channels = color->jp2_pclr->nr_channels;
old_comps = image->comps;
new_comps = (opj_image_comp_t*)
opj_malloc(nr_channels * sizeof(opj_image_comp_t));
for(i = 0; i < nr_channels; ++i)
{
pcol = cmap[i].pcol; cmp = cmap[i].cmp;
new_comps[pcol] = old_comps[cmp];
if(cmap[i].mtyp == 0) /* Direct use */
{
old_comps[cmp].data = NULL; continue;
}
/* Palette mapping: */
new_comps[pcol].data = (int*)
opj_malloc(old_comps[cmp].w * old_comps[cmp].h * sizeof(int));
new_comps[pcol].prec = channel_size[i];
new_comps[pcol].sgnd = channel_sign[i];
}
top_k = color->jp2_pclr->nr_entries - 1;
for(i = 0; i < nr_channels; ++i)
{
/* Direct use: */
if(cmap[i].mtyp == 0) continue;
/* Palette mapping: */
cmp = cmap[i].cmp; pcol = cmap[i].pcol;
src = old_comps[cmp].data;
dst = new_comps[pcol].data;
max = new_comps[pcol].w * new_comps[pcol].h;
for(j = 0; j < max; ++j)
{
/* The index */
if((k = src[j]) < 0) k = 0; else if(k > top_k) k = top_k;
/* The colour */
dst[j] = entries[k * nr_channels + pcol];
}
}
max = image->numcomps;
for(i = 0; i < max; ++i)
{
if(old_comps[i].data) opj_free(old_comps[i].data);
}
opj_free(old_comps);
image->comps = new_comps;
image->numcomps = nr_channels;
jp2_free_pclr(color);
}/* apply_pclr() */
static opj_bool jp2_read_pclr(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_box_t *box, opj_jp2_color_t *color)
{
opj_jp2_pclr_t *jp2_pclr;
unsigned char *channel_size, *channel_sign;
unsigned int *entries;
unsigned short nr_entries, nr_channels;
unsigned short i, j;
unsigned char uc;
OPJ_ARG_NOT_USED(box);
OPJ_ARG_NOT_USED(jp2);
/* Part 1, I.5.3.4: 'There shall be at most one Palette box inside
* a JP2 Header box' :
*/
if(color->jp2_pclr) return OPJ_FALSE;
nr_entries = (unsigned short)cio_read(cio, 2); /* NE */
nr_channels = (unsigned short)cio_read(cio, 1);/* NPC */
entries = (unsigned int*)
opj_malloc(nr_channels * nr_entries * sizeof(unsigned int));
channel_size = (unsigned char*)opj_malloc(nr_channels);
channel_sign = (unsigned char*)opj_malloc(nr_channels);
jp2_pclr = (opj_jp2_pclr_t*)opj_malloc(sizeof(opj_jp2_pclr_t));
jp2_pclr->channel_sign = channel_sign;
jp2_pclr->channel_size = channel_size;
jp2_pclr->entries = entries;
jp2_pclr->nr_entries = nr_entries;
jp2_pclr->nr_channels = nr_channels;
jp2_pclr->cmap = NULL;
color->jp2_pclr = jp2_pclr;
for(i = 0; i < nr_channels; ++i)
{
uc = cio_read(cio, 1); /* Bi */
channel_size[i] = (uc & 0x7f) + 1;
channel_sign[i] = (uc & 0x80)?1:0;
}
for(j = 0; j < nr_entries; ++j)
{
for(i = 0; i < nr_channels; ++i)
{
/* Cji */
*entries++ = cio_read(cio, channel_size[i]>>3);
}
}
return OPJ_TRUE;
}/* jp2_read_pclr() */
/**
* Reads a palette box.
*
* @param p_bpc_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_bpc_header_size pointer that will hold the size of the bpc header
* @param p_bpc_header_max_size maximum size of the header, any size bigger than this value should result the function to output false.
* @param p_manager the user event manager.
*
* @return true if the bpc header is valid, fale else.
*/
opj_bool jp2_read_pclr_v2( opj_jp2_v2_t *jp2,
unsigned char * p_pclr_header_data,
OPJ_UINT32 p_pclr_header_size,
opj_event_mgr_t * p_manager
){
opj_jp2_pclr_t *jp2_pclr;
OPJ_BYTE *channel_size, *channel_sign;
OPJ_UINT32 *entries;
OPJ_UINT16 nr_entries,nr_channels;
OPJ_UINT16 i, j;
OPJ_UINT32 l_value;
// preconditions
assert(p_pclr_header_data != 00);
assert(jp2 != 00);
assert(p_manager != 00);
if(jp2->color.jp2_pclr)
return OPJ_FALSE;
opj_read_bytes(p_pclr_header_data, &l_value , 2); /* NE */
p_pclr_header_data += 2;
nr_entries = (OPJ_UINT16) l_value;
opj_read_bytes(p_pclr_header_data, &l_value , 1); /* NPC */
++p_pclr_header_data;
nr_channels = (OPJ_UINT16) l_value;
entries = (OPJ_UINT32*) opj_malloc(nr_channels * nr_entries * sizeof(OPJ_UINT32));
channel_size = (OPJ_BYTE*) opj_malloc(nr_channels);
channel_sign = (OPJ_BYTE*) opj_malloc(nr_channels);
jp2_pclr = (opj_jp2_pclr_t*)opj_malloc(sizeof(opj_jp2_pclr_t));
jp2_pclr->channel_sign = channel_sign;
jp2_pclr->channel_size = channel_size;
jp2_pclr->entries = entries;
jp2_pclr->nr_entries = nr_entries;
jp2_pclr->nr_channels = nr_channels;
jp2_pclr->cmap = NULL;
jp2->color.jp2_pclr = jp2_pclr;
for(i = 0; i < nr_channels; ++i) {
opj_read_bytes(p_pclr_header_data, &l_value , 1); /* Bi */
++p_pclr_header_data;
channel_size[i] = (l_value & 0x7f) + 1;
channel_sign[i] = (l_value & 0x80)? 1 : 0;
}
for(j = 0; j < nr_entries; ++j) {
for(i = 0; i < nr_channels; ++i) {
//*entries++ = cio_read(cio, channel_size[i]>>3);
opj_read_bytes(p_pclr_header_data, &l_value , channel_size[i]>>3); /* Cji */
p_pclr_header_data += channel_size[i]>>3;
*entries = (OPJ_UINT32) l_value;
entries++;
}
}
return OPJ_TRUE;
}
static opj_bool jp2_read_cmap(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_box_t *box, opj_jp2_color_t *color)
{
opj_jp2_cmap_comp_t *cmap;
unsigned short i, nr_channels;
OPJ_ARG_NOT_USED(box);
OPJ_ARG_NOT_USED(jp2);
/* Need nr_channels: */
if(color->jp2_pclr == NULL) return OPJ_FALSE;
/* Part 1, I.5.3.5: 'There shall be at most one Component Mapping box
* inside a JP2 Header box' :
*/
if(color->jp2_pclr->cmap) return OPJ_FALSE;
nr_channels = color->jp2_pclr->nr_channels;
cmap = (opj_jp2_cmap_comp_t*)
opj_malloc(nr_channels * sizeof(opj_jp2_cmap_comp_t));
for(i = 0; i < nr_channels; ++i)
{
cmap[i].cmp = (unsigned short)cio_read(cio, 2);
cmap[i].mtyp = cio_read(cio, 1);
cmap[i].pcol = cio_read(cio, 1);
}
color->jp2_pclr->cmap = cmap;
return OPJ_TRUE;
}/* jp2_read_cmap() */
/**
* Reads the Component Mapping box.
*
* @param p_cmap_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_cmap_header_size pointer that will hold the size of the color header
* @param p_manager the user event manager.
*
* @return true if the cdef header is valid, false else.
*/
static opj_bool jp2_read_cmap_v2( opj_jp2_v2_t * jp2,
unsigned char * p_cmap_header_data,
OPJ_UINT32 p_cmap_header_size,
opj_event_mgr_t * p_manager
)
{
opj_jp2_cmap_comp_t *cmap;
OPJ_BYTE i, nr_channels;
OPJ_UINT32 l_value;
// preconditions
assert(jp2 != 00);
assert(p_cmap_header_data != 00);
assert(p_manager != 00);
/* Need nr_channels: */
if(jp2->color.jp2_pclr == NULL) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Need to read a PCLR box before the CMAP box.\n");
return OPJ_FALSE;
}
/* Part 1, I.5.3.5: 'There shall be at most one Component Mapping box
* inside a JP2 Header box' :
*/
if(jp2->color.jp2_pclr->cmap) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Only one CMAP box is allowed.\n");
return OPJ_FALSE;
}
nr_channels = jp2->color.jp2_pclr->nr_channels;
cmap = (opj_jp2_cmap_comp_t*) opj_malloc(nr_channels * sizeof(opj_jp2_cmap_comp_t));
for(i = 0; i < nr_channels; ++i) {
opj_read_bytes(p_cmap_header_data, &l_value, 2); /* CMP^i */
p_cmap_header_data +=2;
cmap[i].cmp = (OPJ_UINT16) l_value;
opj_read_bytes(p_cmap_header_data, &l_value, 1); /* MTYP^i */
++p_cmap_header_data;
cmap[i].mtyp = (OPJ_BYTE) l_value;
opj_read_bytes(p_cmap_header_data, &l_value, 1); /* PCOL^i */
++p_cmap_header_data;
cmap[i].pcol = (OPJ_BYTE) l_value;
}
jp2->color.jp2_pclr->cmap = cmap;
return OPJ_TRUE;
}
static void jp2_apply_cdef(opj_image_t *image, opj_jp2_color_t *color)
{
opj_jp2_cdef_info_t *info;
int color_space;
unsigned short i, n, cn, typ, asoc, acn;
color_space = image->color_space;
info = color->jp2_cdef->info;
n = color->jp2_cdef->n;
for(i = 0; i < n; ++i)
{
/* WATCH: acn = asoc - 1 ! */
if((asoc = info[i].asoc) == 0) continue;
cn = info[i].cn; typ = info[i].typ; acn = asoc - 1;
if(cn != acn)
{
opj_image_comp_t saved;
memcpy(&saved, &image->comps[cn], sizeof(opj_image_comp_t));
memcpy(&image->comps[cn], &image->comps[acn], sizeof(opj_image_comp_t));
memcpy(&image->comps[acn], &saved, sizeof(opj_image_comp_t));
info[i].asoc = cn + 1;
info[acn].asoc = info[acn].cn + 1;
}
}
if(color->jp2_cdef->info) opj_free(color->jp2_cdef->info);
opj_free(color->jp2_cdef); color->jp2_cdef = NULL;
}/* jp2_apply_cdef() */
static opj_bool jp2_read_cdef(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_box_t *box, opj_jp2_color_t *color)
{
opj_jp2_cdef_info_t *info;
unsigned short i, n;
OPJ_ARG_NOT_USED(box);
OPJ_ARG_NOT_USED(jp2);
/* Part 1, I.5.3.6: 'The shall be at most one Channel Definition box
* inside a JP2 Header box.'
*/
if(color->jp2_cdef) return OPJ_FALSE;
if((n = (unsigned short)cio_read(cio, 2)) == 0) return OPJ_FALSE; /* szukw000: FIXME */
info = (opj_jp2_cdef_info_t*)
opj_malloc(n * sizeof(opj_jp2_cdef_info_t));
color->jp2_cdef = (opj_jp2_cdef_t*)opj_malloc(sizeof(opj_jp2_cdef_t));
color->jp2_cdef->info = info;
color->jp2_cdef->n = n;
for(i = 0; i < n; ++i)
{
info[i].cn = (unsigned short)cio_read(cio, 2);
info[i].typ = (unsigned short)cio_read(cio, 2);
info[i].asoc = (unsigned short)cio_read(cio, 2);
}
return OPJ_TRUE;
}/* jp2_read_cdef() */
/**
* Reads the Component Definition box.
*
* @param p_cdef_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_cdef_header_size pointer that will hold the size of the color header
* @param p_manager the user event manager.
*
* @return true if the cdef header is valid, false else.
*/
static opj_bool jp2_read_cdef_v2( opj_jp2_v2_t * jp2,
unsigned char * p_cdef_header_data,
OPJ_UINT32 p_cdef_header_size,
opj_event_mgr_t * p_manager
)
{
opj_jp2_cdef_info_t *cdef_info;
unsigned short i;
OPJ_UINT32 l_value;
// preconditions
assert(jp2 != 00);
assert(p_cdef_header_data != 00);
assert(p_manager != 00);
/* Part 1, I.5.3.6: 'The shall be at most one Channel Definition box
* inside a JP2 Header box.'*/
if(jp2->color.jp2_cdef) return OPJ_FALSE;
opj_read_bytes(p_cdef_header_data,&l_value ,2); /* N */
p_cdef_header_data+= 2;
if ( (OPJ_UINT16)l_value == 0){ /* szukw000: FIXME */
opj_event_msg_v2(p_manager, EVT_ERROR, "Number of channel description is equal to zero in CDEF box.\n");
return OPJ_FALSE;
}
cdef_info = (opj_jp2_cdef_info_t*) opj_malloc(l_value * sizeof(opj_jp2_cdef_info_t));
jp2->color.jp2_cdef = (opj_jp2_cdef_t*)opj_malloc(sizeof(opj_jp2_cdef_t));
jp2->color.jp2_cdef->info = cdef_info;
jp2->color.jp2_cdef->n = (OPJ_UINT16) l_value;
for(i = 0; i < jp2->color.jp2_cdef->n; ++i) {
opj_read_bytes(p_cdef_header_data, &l_value, 2); /* Cn^i */
p_cdef_header_data +=2;
cdef_info[i].cn = (OPJ_UINT16) l_value;
opj_read_bytes(p_cdef_header_data, &l_value, 2); /* Typ^i */
p_cdef_header_data +=2;
cdef_info[i].typ = (OPJ_UINT16) l_value;
opj_read_bytes(p_cdef_header_data, &l_value, 2); /* Asoc^i */
p_cdef_header_data +=2;
cdef_info[i].asoc = (OPJ_UINT16) l_value;
}
return OPJ_TRUE;
}
static opj_bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_box_t *box, opj_jp2_color_t *color)
{
int skip_len;
opj_common_ptr cinfo;
/* Part 1, I.5.3.3 : 'A conforming JP2 reader shall ignore all Colour
* Specification boxes after the first.'
*/
if(color->jp2_has_colr) return OPJ_FALSE;
cinfo = jp2->cinfo;
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
if (jp2->meth == 2)
{
/* skip PROFILE */
skip_len = box->init_pos + box->length - cio_tell(cio);
if (skip_len < 0)
{
opj_event_msg(cinfo, EVT_ERROR, "Error with COLR box size\n");
return OPJ_FALSE;
}
if(skip_len > 0)
{
unsigned char *start;
start = cio_getbp(cio);
color->icc_profile_buf = (unsigned char*)opj_malloc(skip_len);
color->icc_profile_len = skip_len;
cio_skip(cio, box->init_pos + box->length - cio_tell(cio));
memcpy(color->icc_profile_buf, start, skip_len);
}
}
if (cio_tell(cio) - box->init_pos != box->length)
{
opj_event_msg(cinfo, EVT_ERROR, "Error with COLR Box\n");
return OPJ_FALSE;
}
color->jp2_has_colr = 1;
return OPJ_TRUE;
}/* jp2_read_colr() */
/**
* Reads the Colour Specification box.
*
* @param p_colr_header_data pointer to actual data (already read from file)
* @param jp2 the jpeg2000 file codec.
* @param p_colr_header_size pointer that will hold the size of the color header
* @param p_colr_header_max_size maximum size of the header, any size bigger than this value should result the function to output false.
* @param p_manager the user event manager.
*
* @return true if the bpc header is valid, fale else.
*/
static opj_bool jp2_read_colr_v2( opj_jp2_v2_t * jp2,
unsigned char * p_colr_header_data,
OPJ_UINT32 p_colr_header_size,
opj_event_mgr_t * p_manager
)
{
OPJ_UINT32 l_value;
// preconditions
assert(jp2 != 00);
assert(p_colr_header_data != 00);
assert(p_manager != 00);
if (p_colr_header_size < 3) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Bad COLR header box (bad size)\n");
return OPJ_FALSE;
}
/* Part 1, I.5.3.3 : 'A conforming JP2 reader shall ignore all Colour
* Specification boxes after the first.'
*/
if(jp2->color.jp2_has_colr) {
opj_event_msg_v2(p_manager, EVT_INFO, "A conforming JP2 reader shall ignore all Colour Specification boxes after the first, so we ignore this one.\n");
p_colr_header_data += p_colr_header_size;
return OPJ_TRUE;
}
opj_read_bytes(p_colr_header_data,&jp2->meth ,1); /* METH */
++p_colr_header_data;
opj_read_bytes(p_colr_header_data,&jp2->precedence ,1); /* PRECEDENCE */
++p_colr_header_data;
opj_read_bytes(p_colr_header_data,&jp2->approx ,1); /* APPROX */
++p_colr_header_data;
if (jp2->meth == 1) {
if (p_colr_header_size != 7) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Bad BPCC header box (bad size)\n");
return OPJ_FALSE;
}
opj_read_bytes(p_colr_header_data,&jp2->enumcs ,4); /* EnumCS */
}
else if (jp2->meth == 2) {
// ICC profile
int it_icc_value = 0;
int icc_len = p_colr_header_size - 3;
jp2->color.icc_profile_len = icc_len;
jp2->color.icc_profile_buf = (unsigned char*) opj_malloc(icc_len);
memset(jp2->color.icc_profile_buf, 0, icc_len * sizeof(unsigned char));
for (it_icc_value = 0; it_icc_value < icc_len; ++it_icc_value)
{
opj_read_bytes(p_colr_header_data,&l_value,1); /* icc values */
++p_colr_header_data;
jp2->color.icc_profile_buf[it_icc_value] = (OPJ_BYTE) l_value;
}
}
else // TODO MSD
opj_event_msg_v2(p_manager, EVT_INFO, "COLR BOX meth value is not a regular value (%d), so we will skip the fields following the approx field.\n", jp2->meth);
jp2->color.jp2_has_colr = 1;
return OPJ_TRUE;
}
opj_bool jp2_read_jp2h(opj_jp2_t *jp2, opj_cio_t *cio, opj_jp2_color_t *color)
{
opj_jp2_box_t box;
int jp2h_end;
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 OPJ_FALSE;
}
cio_skip(cio, box.length - 8);
if(cio->bp >= cio->end) return OPJ_FALSE;
jp2_read_boxhdr(cinfo, cio, &box);
}
} while(JP2_JP2H != box.type);
if (!jp2_read_ihdr(jp2, cio))
return OPJ_FALSE;
jp2h_end = box.init_pos + box.length;
if (jp2->bpc == 255)
{
if (!jp2_read_bpcc(jp2, cio))
return OPJ_FALSE;
}
jp2_read_boxhdr(cinfo, cio, &box);
while(cio_tell(cio) < jp2h_end)
{
if(box.type == JP2_COLR)
{
if( !jp2_read_colr(jp2, cio, &box, color))
{
cio_seek(cio, box.init_pos + 8);
cio_skip(cio, box.length - 8);
}
jp2_read_boxhdr(cinfo, cio, &box);
continue;
}
if(box.type == JP2_CDEF)
{
if( !jp2_read_cdef(jp2, cio, &box, color))
{
cio_seek(cio, box.init_pos + 8);
cio_skip(cio, box.length - 8);
}
jp2_read_boxhdr(cinfo, cio, &box);
continue;
}
if(box.type == JP2_PCLR)
{
if( !jp2_read_pclr(jp2, cio, &box, color))
{
cio_seek(cio, box.init_pos + 8);
cio_skip(cio, box.length - 8);
}
jp2_read_boxhdr(cinfo, cio, &box);
continue;
}
if(box.type == JP2_CMAP)
{
if( !jp2_read_cmap(jp2, cio, &box, color))
{
cio_seek(cio, box.init_pos + 8);
cio_skip(cio, box.length - 8);
}
jp2_read_boxhdr(cinfo, cio, &box);
continue;
}
cio_seek(cio, box.init_pos + 8);
cio_skip(cio, box.length - 8);
jp2_read_boxhdr(cinfo, cio, &box);
}/* while(cio_tell(cio) < box_end) */
cio_seek(cio, jp2h_end);
/* Part 1, I.5.3.3 : 'must contain at least one' */
return (color->jp2_has_colr == 1);
}/* jp2_read_jp2h() */
opj_image_t* opj_jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio,
opj_codestream_info_t *cstr_info)
{
opj_common_ptr cinfo;
opj_image_t *image = NULL;
opj_jp2_color_t color;
if(!jp2 || !cio)
{
return NULL;
}
memset(&color, 0, sizeof(opj_jp2_color_t));
cinfo = jp2->cinfo;
/* JP2 decoding */
if(!jp2_read_struct(jp2, cio, &color))
{
free_color_data(&color);
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n");
return NULL;
}
/* J2K decoding */
image = j2k_decode(jp2->j2k, cio, cstr_info);
if(!image)
{
free_color_data(&color);
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n");
return NULL;
}
/* Set Image Color Space */
if (jp2->enumcs == 16)
image->color_space = CLRSPC_SRGB;
else if (jp2->enumcs == 17)
image->color_space = CLRSPC_GRAY;
else if (jp2->enumcs == 18)
image->color_space = CLRSPC_SYCC;
else
image->color_space = CLRSPC_UNKNOWN;
if(color.jp2_cdef)
{
jp2_apply_cdef(image, &color);
}
if(color.jp2_pclr)
{
/* Part 1, I.5.3.4: Either both or none : */
if( !color.jp2_pclr->cmap)
jp2_free_pclr(&color);
else
jp2_apply_pclr(&color, image);
}
if(color.icc_profile_buf)
{
image->icc_profile_buf = color.icc_profile_buf;
color.icc_profile_buf = NULL;
image->icc_profile_len = color.icc_profile_len;
}
return image;
}/* opj_jp2_decode() */
void jp2_write_jp2h(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_JP2H, 4); /* JP2H */
jp2_write_ihdr(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);
}
static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) {
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 */
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 */
}
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 opj_bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) {
int i;
opj_jp2_box_t box;
opj_common_ptr cinfo = jp2->cinfo;
jp2_read_boxhdr(cinfo, cio, &box);
if (JP2_FTYP != box.type) {
opj_event_msg(cinfo, EVT_ERROR, "Expected FTYP Marker\n");
return OPJ_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));
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) {
opj_event_msg(cinfo, EVT_ERROR, "Error with FTYP Box\n");
return OPJ_FALSE;
}
return OPJ_TRUE;
}
static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info) {
unsigned int j2k_codestream_offset, j2k_codestream_length;
opj_jp2_box_t box;
opj_j2k_t *j2k = jp2->j2k;
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, cstr_info)) {
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;
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;
}
static opj_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_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);
*j2k_codestream_offset = cio_tell(cio);
*j2k_codestream_length = box.length - 8;
return OPJ_TRUE;
}
static void jp2_write_jp(opj_cio_t *cio) {
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.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 opj_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) {
opj_event_msg(cinfo, EVT_ERROR, "Expected JP Marker\n");
return OPJ_FALSE;
}
if (0x0d0a870a != cio_read(cio, 4)) {
opj_event_msg(cinfo, EVT_ERROR, "Error with JP Marker\n");
return OPJ_FALSE;
}
if (cio_tell(cio) - box.init_pos != box.length) {
opj_event_msg(cinfo, EVT_ERROR, "Error with JP Box size\n");
return OPJ_FALSE;
}
return OPJ_TRUE;
}
static opj_bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio,
opj_jp2_color_t *color) {
if (!jp2_read_jp(jp2, cio))
return OPJ_FALSE;
if (!jp2_read_ftyp(jp2, cio))
return OPJ_FALSE;
if (!jp2_read_jp2h(jp2, cio, color))
return OPJ_FALSE;
if (!jp2_read_jp2c(jp2, cio, &jp2->j2k_codestream_length, &jp2->j2k_codestream_offset))
return OPJ_FALSE;
return OPJ_TRUE;
}
static int write_fidx( int offset_jp2c, int length_jp2c, int offset_idx, int length_idx, opj_cio_t *cio)
{
int len, lenp;
lenp = cio_tell( cio);
cio_skip( cio, 4); /* L [at the end] */
cio_write( cio, JPIP_FIDX, 4); /* IPTR */
write_prxy( offset_jp2c, length_jp2c, offset_idx, offset_jp2c, cio);
len = cio_tell( cio)-lenp;
cio_seek( cio, lenp);
cio_write( cio, len, 4); /* L */
cio_seek( cio, lenp+len);
return len;
}
static void write_prxy( int offset_jp2c, int length_jp2c, int offset_idx, int length_idx, opj_cio_t *cio)
{
int len, lenp;
lenp = cio_tell( cio);
cio_skip( cio, 4); /* L [at the end] */
cio_write( cio, JPIP_PRXY, 4); /* IPTR */
cio_write( cio, offset_jp2c, 8); /* OOFF */
cio_write( cio, length_jp2c, 4); /* OBH part 1 */
cio_write( cio, JP2_JP2C, 4); /* OBH part 2 */
cio_write( cio, 1,1); /* NI */
cio_write( cio, offset_idx, 8); /* IOFF */
cio_write( cio, length_idx, 4); /* IBH part 1 */
cio_write( cio, JPIP_CIDX, 4); /* IBH part 2 */
len = cio_tell( cio)-lenp;
cio_seek( cio, lenp);
cio_write( cio, len, 4); /* L */
cio_seek( cio, lenp+len);
}
static void write_iptr( int offset, int length, opj_cio_t *cio)
{
int len, lenp;
lenp = cio_tell( cio);
cio_skip( cio, 4); /* L [at the end] */
cio_write( cio, JPIP_IPTR, 4); /* IPTR */
cio_write( cio, offset, 8);
cio_write( cio, length, 8);
len = cio_tell( cio)-lenp;
cio_seek( cio, lenp);
cio_write( cio, len, 4); /* L */
cio_seek( cio, lenp+len);
}
/* ----------------------------------------------------------------------- */
/* JP2 decoder interface */
/* ----------------------------------------------------------------------- */
opj_jp2_t* jp2_create_decompress(opj_common_ptr cinfo) {
opj_jp2_t *jp2 = (opj_jp2_t*) opj_calloc(1, 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);
}
}
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 */
}
void jp2_setup_decoder_v2(opj_jp2_v2_t *jp2, opj_dparameters_t *parameters)
{
/* setup the J2K codec */
j2k_setup_decoder_v2(jp2->j2k, parameters);
/* further JP2 initializations go here */
jp2->color.jp2_has_colr = 0;
}
/* ----------------------------------------------------------------------- */
/* JP2 encoder interface */
/* ----------------------------------------------------------------------- */
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;
}
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);
}
}
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 */
/* ------------------- */
/* Check if number of components respects standard */
if (image->numcomps < 1 || image->numcomps > 16384) {
opj_event_msg(jp2->cinfo, EVT_ERROR, "Invalid number of components specified while setting up JP2 encoder\n");
return;
}
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->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);
}
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 */
jp2->precedence = 0; /* PRECEDENCE */
jp2->approx = 0; /* APPROX */
jp2->jpip_on = parameters->jpip_on;
}
opj_bool opj_jp2_encode(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info) {
int pos_iptr, pos_cidx, pos_jp2c, len_jp2c, end_pos, pos_fidx, len_fidx;
/* 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);
if( jp2->jpip_on){
pos_iptr = cio_tell( cio);
cio_skip( cio, 24); /* IPTR further ! */
pos_jp2c = cio_tell( cio);
}
/* J2K encoding */
if(!(len_jp2c = jp2_write_jp2c( jp2, cio, image, cstr_info))){
opj_event_msg(jp2->cinfo, EVT_ERROR, "Failed to encode image\n");
return OPJ_FALSE;
}
if( jp2->jpip_on){
pos_cidx = cio_tell( cio);
write_cidx( pos_jp2c+8, cio, image, *cstr_info, len_jp2c-8);
pos_fidx = cio_tell( cio);
len_fidx = write_fidx( pos_jp2c, len_jp2c, pos_cidx, cio_tell(cio), cio);
end_pos = cio_tell( cio);
cio_seek( cio, pos_iptr);
write_iptr( pos_fidx, len_fidx, cio);
cio_seek( cio, end_pos);
}
return OPJ_TRUE;
}
/**
* Ends the decompression procedures and possibiliy add data to be read after the
* codestream.
*/
opj_bool jp2_end_decompress(opj_jp2_v2_t *jp2, opj_stream_private_t *cio, opj_event_mgr_t * p_manager)
{
// preconditions
assert(jp2 != 00);
assert(cio != 00);
assert(p_manager != 00);
/* customization of the end encoding */
jp2_setup_end_header_reading(jp2);
/* write header */
if (! jp2_exec (jp2,jp2->m_procedure_list,cio,p_manager)) {
return OPJ_FALSE;
}
return j2k_end_decompress(jp2->j2k, cio, p_manager);
}
/**
* Sets up the procedures to do on reading header after the codestream.
* Developpers wanting to extend the library can add their own writting procedures.
*/
void jp2_setup_end_header_reading (opj_jp2_v2_t *jp2)
{
// preconditions
assert(jp2 != 00);
opj_procedure_list_add_procedure(jp2->m_procedure_list,(void*)jp2_read_header_procedure );
/* DEVELOPER CORNER, add your custom procedures */
}
/**
* Reads a jpeg2000 file header structure.
*
* @param cio the stream to read data from.
* @param jp2 the jpeg2000 file header structure.
* @param p_manager the user event manager.
*
* @return true if the box is valid.
*/
opj_bool jp2_read_header_procedure(
opj_jp2_v2_t *jp2,
opj_stream_private_t *cio,
opj_event_mgr_t * p_manager)
{
opj_jp2_box_t box;
OPJ_UINT32 l_nb_bytes_read;
const opj_jp2_header_handler_t * l_current_handler;
OPJ_UINT32 l_last_data_size = BOX_SIZE;
OPJ_UINT32 l_current_data_size;
unsigned char * l_current_data = 00;
// preconditions
assert(cio != 00);
assert(jp2 != 00);
assert(p_manager != 00);
l_current_data = (unsigned char*)opj_malloc(l_last_data_size);
if (l_current_data == 00) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Not enough memory to handle jpeg2000 file header\n");
return OPJ_FALSE;
}
memset(l_current_data, 0 , l_last_data_size);
while (jp2_read_boxhdr_v2(&box,&l_nb_bytes_read,cio,p_manager)) {
// is it the codestream box ?
if (box.type == JP2_JP2C) {
if (jp2->jp2_state & JP2_STATE_HEADER) {
jp2->jp2_state |= JP2_STATE_CODESTREAM;
opj_free(l_current_data);
return OPJ_TRUE;
}
else {
opj_event_msg_v2(p_manager, EVT_ERROR, "bad placed jpeg codestream\n");
opj_free(l_current_data);
return OPJ_FALSE;
}
}
else if (box.length == 0) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Cannot handle box of undefined sizes\n");
opj_free(l_current_data);
return OPJ_FALSE;
}
l_current_handler = jp2_find_handler(box.type);
l_current_data_size = box.length - l_nb_bytes_read;
if (l_current_handler != 00) {
if (l_current_data_size > l_last_data_size) {
l_current_data = (unsigned char*)opj_realloc(l_current_data,l_current_data_size);
l_last_data_size = l_current_data_size;
}
l_nb_bytes_read = opj_stream_read_data(cio,l_current_data,l_current_data_size,p_manager);
if (l_nb_bytes_read != l_current_data_size) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Problem with reading JPEG2000 box, stream error\n");
return OPJ_FALSE;
}
if (! l_current_handler->handler(jp2,l_current_data,l_current_data_size,p_manager)) {
opj_free(l_current_data);
return OPJ_FALSE;
}
}
else {
jp2->jp2_state |= JP2_STATE_UNKNOWN;
if (opj_stream_skip(cio,l_current_data_size,p_manager) != l_current_data_size) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Problem with skipping JPEG2000 box, stream error\n");
opj_free(l_current_data);
return OPJ_FALSE;
}
}
}
opj_free(l_current_data);
return OPJ_TRUE;
}
/**
* Excutes the given procedures on the given codec.
*
* @param p_procedure_list the list of procedures to execute
* @param jp2 the jpeg2000 file codec to execute the procedures on.
* @param cio the stream to execute the procedures on.
* @param p_manager the user manager.
*
* @return true if all the procedures were successfully executed.
*/
opj_bool jp2_exec (
opj_jp2_v2_t * jp2,
opj_procedure_list_t * p_procedure_list,
opj_stream_private_t *cio,
opj_event_mgr_t * p_manager
)
{
opj_bool (** l_procedure) (opj_jp2_v2_t * jp2, opj_stream_private_t *, opj_event_mgr_t *) = 00;
opj_bool l_result = OPJ_TRUE;
OPJ_UINT32 l_nb_proc, i;
// preconditions
assert(p_procedure_list != 00);
assert(jp2 != 00);
assert(cio != 00);
assert(p_manager != 00);
l_nb_proc = opj_procedure_list_get_nb_procedures(p_procedure_list);
l_procedure = (opj_bool (**) (opj_jp2_v2_t * jp2, opj_stream_private_t *, opj_event_mgr_t *)) opj_procedure_list_get_first_procedure(p_procedure_list);
for (i=0;i<l_nb_proc;++i) {
l_result = l_result && (*l_procedure) (jp2,cio,p_manager);
++l_procedure;
}
// and clear the procedure list at the end.
opj_procedure_list_clear(p_procedure_list);
return l_result;
}
/**
* Finds the execution function related to the given box id.
*
* @param p_id the id of the handler to fetch.
*
* @return the given handler or 00 if it could not be found.
*/
const opj_jp2_header_handler_t * jp2_find_handler (int p_id)
{
OPJ_UINT32 i, l_handler_size = sizeof(jp2_header) / sizeof(opj_jp2_header_handler_t);
for (i=0;i<l_handler_size;++i) {
if (jp2_header[i].id == p_id) {
return &jp2_header[i];
}
}
return NULL;
}
/**
* Finds the image execution function related to the given box id.
*
* @param p_id the id of the handler to fetch.
*
* @return the given handler or 00 if it could not be found.
*/
static const opj_jp2_header_handler_t * jp2_img_find_handler (
int p_id
)
{
OPJ_UINT32 i, l_handler_size = sizeof(jp2_img_header) / sizeof(opj_jp2_header_handler_t);
for (i=0;i<l_handler_size;++i)
{
if (jp2_img_header[i].id == p_id) {
return &jp2_img_header[i];
}
}
return NULL;
}
/**
* Reads a jpeg2000 file signature box.
*
* @param p_header_data the data contained in the signature box.
* @param jp2 the jpeg2000 file codec.
* @param p_header_size the size of the data contained in the signature box.
* @param p_manager the user event manager.
*
* @return true if the file signature box is valid.
*/
opj_bool jp2_read_jp_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_header_data,
unsigned int p_header_size,
opj_event_mgr_t * p_manager
)
{
unsigned int l_magic_number;
// preconditions
assert(p_header_data != 00);
assert(jp2 != 00);
assert(p_manager != 00);
if (jp2->jp2_state != JP2_STATE_NONE) {
opj_event_msg_v2(p_manager, EVT_ERROR, "The signature box must be the first box in the file.\n");
return OPJ_FALSE;
}
/* assure length of data is correct (4 -> magic number) */
if (p_header_size != 4) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Error with JP signature Box size\n");
return OPJ_FALSE;
}
// rearrange data
opj_read_bytes(p_header_data,&l_magic_number,4);
if (l_magic_number != 0x0d0a870a ) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Error with JP Signature : bad magic number\n");
return OPJ_FALSE;
}
jp2->jp2_state |= JP2_STATE_SIGNATURE;
return OPJ_TRUE;
}
/**
* Reads a a FTYP box - File type box
*
* @param p_header_data the data contained in the FTYP box.
* @param jp2 the jpeg2000 file codec.
* @param p_header_size the size of the data contained in the FTYP box.
* @param p_manager the user event manager.
*
* @return true if the FTYP box is valid.
*/
opj_bool jp2_read_ftyp_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_header_data,
unsigned int p_header_size,
opj_event_mgr_t * p_manager
)
{
OPJ_UINT32 i, l_remaining_bytes;
// preconditions
assert(p_header_data != 00);
assert(jp2 != 00);
assert(p_manager != 00);
if (jp2->jp2_state != JP2_STATE_SIGNATURE) {
opj_event_msg_v2(p_manager, EVT_ERROR, "The ftyp box must be the second box in the file.\n");
return OPJ_FALSE;
}
/* assure length of data is correct */
if (p_header_size < 8) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Error with FTYP signature Box size\n");
return OPJ_FALSE;
}
opj_read_bytes(p_header_data,&jp2->brand,4); /* BR */
p_header_data += 4;
opj_read_bytes(p_header_data,&jp2->minversion,4); /* MinV */
p_header_data += 4;
l_remaining_bytes = p_header_size - 8;
/* the number of remaining bytes should be a multiple of 4 */
if ((l_remaining_bytes & 0x3) != 0) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Error with FTYP signature Box size\n");
return OPJ_FALSE;
}
/* div by 4 */
jp2->numcl = l_remaining_bytes >> 2;
if (jp2->numcl) {
jp2->cl = (unsigned int *) opj_malloc(jp2->numcl * sizeof(unsigned int));
if (jp2->cl == 00) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Not enough memory with FTYP Box\n");
return OPJ_FALSE;
}
memset(jp2->cl,0,jp2->numcl * sizeof(unsigned int));
}
for (i = 0; i < jp2->numcl; ++i)
{
opj_read_bytes(p_header_data,&jp2->cl[i],4); /* CLi */
p_header_data += 4;
}
jp2->jp2_state |= JP2_STATE_FILE_TYPE;
return OPJ_TRUE;
}
/**
* Reads the Jpeg2000 file Header box - JP2 Header box (warning, this is a super box).
*
* @param p_header_data the data contained in the file header box.
* @param jp2 the jpeg2000 file codec.
* @param p_header_size the size of the data contained in the file header box.
* @param p_manager the user event manager.
*
* @return true if the JP2 Header box was successfully reconized.
*/
opj_bool jp2_read_jp2h_v2(
opj_jp2_v2_t *jp2,
unsigned char * p_header_data,
unsigned int p_header_size,
opj_event_mgr_t * p_manager
)
{
OPJ_UINT32 l_box_size=0, l_current_data_size = 0;
opj_jp2_box_t box;
const opj_jp2_header_handler_t * l_current_handler;
// preconditions
assert(p_header_data != 00);
assert(jp2 != 00);
assert(p_manager != 00);
/* make sure the box is well placed */
if ((jp2->jp2_state & JP2_STATE_FILE_TYPE) != JP2_STATE_FILE_TYPE ) {
opj_event_msg_v2(p_manager, EVT_ERROR, "The box must be the first box in the file.\n");
return OPJ_FALSE;
}
jp2->jp2_img_state = JP2_IMG_STATE_NONE;
/* iterate while remaining data */
while (p_header_size > 0) {
if (! jp2_read_boxhdr_char(&box,p_header_data,&l_box_size,p_header_size, p_manager)) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Stream error while reading JP2 Header box\n");
return OPJ_FALSE;
}
if (box.length > p_header_size) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Stream error while reading JP2 Header box: box length is inconsistent.\n");
return OPJ_FALSE;
}
l_current_handler = jp2_img_find_handler(box.type);
l_current_data_size = box.length - l_box_size;
p_header_data += l_box_size;
if (l_current_handler != 00) {
if (! l_current_handler->handler(jp2,p_header_data,l_current_data_size,p_manager)) {
return OPJ_FALSE;
}
}
else {
jp2->jp2_img_state |= JP2_IMG_STATE_UNKNOWN;
}
p_header_data += l_current_data_size;
p_header_size -= box.length;
}
jp2->jp2_state |= JP2_STATE_HEADER;
return OPJ_TRUE;
}
/**
* Reads a box header. The box is the way data is packed inside a jpeg2000 file structure. Data is read from a character string
*
* @param p_data the character string to read data from.
* @param box the box structure to fill.
* @param p_number_bytes_read pointer to an int that will store the number of bytes read from the stream (shoul usually be 2).
* @param p_box_max_size the maximum number of bytes in the box.
*
* @return true if the box is reconized, false otherwise
*/
static opj_bool jp2_read_boxhdr_char(
opj_jp2_box_t *box,
OPJ_BYTE * p_data,
OPJ_UINT32 * p_number_bytes_read,
OPJ_UINT32 p_box_max_size,
opj_event_mgr_t * p_manager
)
{
OPJ_UINT32 l_value;
// preconditions
assert(p_data != 00);
assert(box != 00);
assert(p_number_bytes_read != 00);
assert(p_manager != 00);
if (p_box_max_size < 8) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Cannot handle box of less than 8 bytes\n");
return OPJ_FALSE;
}
/* process read data */
opj_read_bytes(p_data, &l_value, 4);
p_data += 4;
box->length = (OPJ_INT32)(l_value);
opj_read_bytes(p_data, &l_value, 4);
p_data += 4;
box->type = (OPJ_INT32)(l_value);
*p_number_bytes_read = 8;
// do we have a "special very large box ?"
// read then the XLBox
if (box->length == 1) {
unsigned int l_xl_part_size;
if (p_box_max_size < 16) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Cannot handle XL box of less than 16 bytes\n");
return OPJ_FALSE;
}
opj_read_bytes(p_data,&l_xl_part_size, 4);
p_data += 4;
*p_number_bytes_read += 4;
if (l_xl_part_size != 0) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n");
return OPJ_FALSE;
}
opj_read_bytes(p_data, &l_value, 4);
*p_number_bytes_read += 4;
box->length = (OPJ_INT32)(l_value);
if (box->length == 0) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Cannot handle box of undefined sizes\n");
return OPJ_FALSE;
}
}
else if (box->length == 0) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Cannot handle box of undefined sizes\n");
return OPJ_FALSE;
}
return OPJ_TRUE;
}
/**
* Reads a jpeg2000 file header structure.
*
* @param cio the stream to read data from.
* @param jp2 the jpeg2000 file header structure.
* @param p_manager the user event manager.
*
* @return true if the box is valid.
*/
opj_bool jp2_read_header( struct opj_stream_private *p_stream,
opj_jp2_v2_t *jp2,
opj_image_header_t* p_img_header,
struct opj_event_mgr * p_manager
)
{
// preconditions
assert(jp2 != 00);
assert(p_stream != 00);
assert(p_manager != 00);
/* customization of the validation */
jp2_setup_decoding_validation (jp2);
/* customization of the encoding */
jp2_setup_header_reading(jp2);
/* validation of the parameters codec */
if (! jp2_exec(jp2,jp2->m_validation_list,p_stream,p_manager)) {
return OPJ_FALSE;
}
/* read header */
if (! jp2_exec (jp2,jp2->m_procedure_list,p_stream,p_manager)) {
return OPJ_FALSE;
}
return j2k_read_header( p_stream,
jp2->j2k,
p_img_header,
p_manager);
}
/**
* Sets up the validation ,i.e. adds the procedures to lauch to make sure the codec parameters
* are valid. Developpers wanting to extend the library can add their own validation procedures.
*/
void jp2_setup_decoding_validation (opj_jp2_v2_t *jp2)
{
// preconditions
assert(jp2 != 00);
/* DEVELOPER CORNER, add your custom validation procedure */
}
/**
* Sets up the procedures to do on reading header.
* Developpers wanting to extend the library can add their own writting procedures.
*/
void jp2_setup_header_reading (opj_jp2_v2_t *jp2)
{
// preconditions
assert(jp2 != 00);
opj_procedure_list_add_procedure(jp2->m_procedure_list,(void*)jp2_read_header_procedure );
/* DEVELOPER CORNER, add your custom procedures */
}
/**
* Reads a tile header.
* @param p_j2k the jpeg2000 codec.
* @param p_stream the stream to write data to.
* @param p_manager the user event manager.
*/
opj_bool jp2_read_tile_header( opj_jp2_v2_t * p_jp2,
OPJ_UINT32 * p_tile_index,
OPJ_UINT32 * p_data_size,
OPJ_INT32 * p_tile_x0, OPJ_INT32 * p_tile_y0,
OPJ_INT32 * p_tile_x1, OPJ_INT32 * p_tile_y1,
OPJ_UINT32 * p_nb_comps,
opj_bool * p_go_on,
opj_stream_private_t *p_stream,
opj_event_mgr_t * p_manager )
{
return j2k_read_tile_header(p_jp2->j2k,
p_tile_index,
p_data_size,
p_tile_x0, p_tile_y0,
p_tile_x1, p_tile_y1,
p_nb_comps,
p_go_on,
p_stream,
p_manager);
}
/**
* Decode tile data.
* @param p_j2k the jpeg2000 codec.
* @param p_stream the stream to write data to.
* @param p_manager the user event manager.
*/
opj_bool opj_jp2_decode_tile (
opj_jp2_v2_t * p_jp2,
OPJ_UINT32 p_tile_index,
OPJ_BYTE * p_data,
OPJ_UINT32 p_data_size,
opj_stream_private_t *p_stream,
opj_event_mgr_t * p_manager
)
{
return j2k_decode_tile (p_jp2->j2k,p_tile_index,p_data,p_data_size,p_stream,p_manager);
}
/**
* Destroys a jpeg2000 file decompressor.
*
* @param jp2 a jpeg2000 file decompressor.
*/
void jp2_destroy(opj_jp2_v2_t *jp2)
{
if (jp2) {
/* destroy the J2K codec */
j2k_destroy(jp2->j2k);
jp2->j2k = 00;
if (jp2->comps) {
opj_free(jp2->comps);
jp2->comps = 00;
}
if (jp2->cl) {
opj_free(jp2->cl);
jp2->cl = 00;
}
if (jp2->color.icc_profile_buf) {
opj_free(jp2->color.icc_profile_buf);
jp2->color.icc_profile_buf = 00;
}
if (jp2->color.jp2_cdef) {
opj_free(jp2->color.jp2_cdef);
jp2->color.jp2_cdef = 00;
}
if (jp2->color.jp2_pclr) {
opj_free(jp2->color.jp2_pclr);
jp2->color.jp2_pclr = 00;
}
if (jp2->m_validation_list) {
opj_procedure_list_destroy(jp2->m_validation_list);
jp2->m_validation_list = 00;
}
if (jp2->m_procedure_list) {
opj_procedure_list_destroy(jp2->m_procedure_list);
jp2->m_procedure_list = 00;
}
opj_free(jp2);
}
}
/**
* Sets the given area to be decoded. This function should be called right after opj_read_header and before any tile header reading.
*
* @param p_jp2 the jpeg2000 codec.
* @param p_end_x the right position of the rectangle to decode (in image coordinates).
* @param p_start_y the up position of the rectangle to decode (in image coordinates).
* @param p_end_y the bottom position of the rectangle to decode (in image coordinates).
* @param p_manager the user event manager
*
* @return true if the area could be set.
*/
opj_bool jp2_set_decode_area( opj_jp2_v2_t *p_jp2,
OPJ_INT32 p_start_x, OPJ_INT32 p_start_y,
OPJ_INT32 p_end_x, OPJ_INT32 p_end_y,
struct opj_event_mgr * p_manager )
{
return j2k_set_decode_area(p_jp2->j2k, p_start_x, p_start_y, p_end_x, p_end_y, p_manager);
}
/* ----------------------------------------------------------------------- */
/* JP2 encoder interface */
/* ----------------------------------------------------------------------- */
opj_jp2_v2_t* jp2_create(opj_bool p_is_decoder)
{
opj_jp2_v2_t *jp2 = (opj_jp2_v2_t*)opj_malloc(sizeof(opj_jp2_v2_t));
if (jp2) {
memset(jp2,0,sizeof(opj_jp2_t));
/* create the J2K codec */
if (! p_is_decoder) {
jp2->j2k = j2k_create_compress_v2();
}
else {
jp2->j2k = j2k_create_decompress_v2();
}
if (jp2->j2k == 00) {
jp2_destroy(jp2);
return 00;
}
// validation list creation
jp2->m_validation_list = opj_procedure_list_create();
if (! jp2->m_validation_list) {
jp2_destroy(jp2);
return 00;
}
// execution list creation
jp2->m_procedure_list = opj_procedure_list_create();
if (! jp2->m_procedure_list) {
jp2_destroy(jp2);
return 00;
}
}
return jp2;
}
Reference in New Issue View Git Blame Copy Permalink