/* * 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) 2008, Jerome Fimes, Communications & Systemes * 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 "jp2.h" #include "cio.h" #include "opj_malloc.h" #include "event.h" #include "j2k.h" #include "function_list.h" #include "assert.h" /** @defgroup JP2 JP2 - JPEG-2000 file format reader/writer */ /*@{*/ #define BOX_SIZE 1024 /** @name Local static functions */ /*@{*/ /** * Writes the Jpeg2000 file Header box - JP2 Header box (warning, this is a super box). * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager user event manager. * * @return true if writting was successful. */ bool jp2_write_jp2h( opj_jp2_t *jp2, struct opj_stream_private *cio, struct opj_event_mgr * p_manager ); /** * Skips the Jpeg2000 Codestream Header box - JP2C Header box. * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager user event manager. * * @return true if writting was successful. */ bool jp2_skip_jp2c( opj_jp2_t *jp2, struct opj_stream_private *cio, 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. */ bool jp2_read_jp2h( opj_jp2_t *jp2, unsigned char * p_header_data, unsigned int p_header_size, struct opj_event_mgr * p_manager ); /** * Writes the Jpeg2000 codestream Header box - JP2C Header box. This function must be called AFTER the coding has been done. * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager user event manager. * * @return true if writting was successful. */ static bool jp2_write_jp2c( opj_jp2_t *jp2, 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 bool jp2_read_boxhdr( opj_jp2_box_t *box, OPJ_UINT32 * p_number_bytes_read, 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. 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 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 ); /** * 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 bool jp2_read_jp( opj_jp2_t *jp2, unsigned char * p_header_data, unsigned int p_header_size, struct opj_event_mgr * p_manager ); /** * Writes a jpeg2000 file signature box. * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager the user event manager. * * @return true if writting was successful. */ static bool jp2_write_jp( opj_jp2_t *jp2, struct opj_stream_private *cio, struct opj_event_mgr * p_manager ); /** * Writes a FTYP box - File type box * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager the user event manager. * * @return true if writting was successful. */ static bool jp2_write_ftyp( opj_jp2_t *jp2, struct opj_stream_private *cio, struct opj_event_mgr * p_manager ); /** * 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 bool jp2_read_ftyp( opj_jp2_t *jp2, unsigned char * p_header_data, unsigned int p_header_size, struct opj_event_mgr * p_manager ); /** * 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 bool jp2_read_ihdr( opj_jp2_t *jp2, unsigned char * p_image_header_data, unsigned int p_image_header_size, struct opj_event_mgr * p_manager ); /** * Writes the Image Header box - Image Header box. * * @param jp2 jpeg2000 file codec. * @param p_nb_bytes_written pointer to store the nb of bytes written by the function. * * @return the data being copied. */ static unsigned char * jp2_write_ihdr( opj_jp2_t *jp2, unsigned int * p_nb_bytes_written ); /** * 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 bool jp2_read_bpcc( opj_jp2_t *jp2, unsigned char * p_bpc_header_data, unsigned int p_bpc_header_size, struct opj_event_mgr * p_manager ); /** * Writes the Bit per Component box. * * @param jp2 jpeg2000 file codec. * @param p_nb_bytes_written pointer to store the nb of bytes written by the function. * * @return the data being copied. */ static unsigned char * jp2_write_bpcc( opj_jp2_t *jp2, unsigned int * p_nb_bytes_written ); /** * 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 the size of the color header * @param p_manager the user event manager. * * @return true if the bpc header is valid, fale else. */ static bool jp2_read_colr( opj_jp2_t *jp2, unsigned char * p_colr_header_data, unsigned int p_colr_header_size, struct opj_event_mgr * p_manager ); /** * Writes the Colour Specification box. * * @param jp2 jpeg2000 file codec. * @param p_nb_bytes_written pointer to store the nb of bytes written by the function. * * @return the data being copied. */ static unsigned char *jp2_write_colr( opj_jp2_t *jp2, unsigned int * p_nb_bytes_written ); /** * 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. */ bool jp2_read_header_procedure( opj_jp2_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 bool jp2_exec ( opj_jp2_t * jp2, struct opj_procedure_list * p_procedure_list, 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); /** * 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_encoding_validation (opj_jp2_t *jp2); /** * Sets up the procedures to do on writting header. Developpers wanting to extend the library can add their own writting procedures. */ static void jp2_setup_header_writting (opj_jp2_t *jp2); /** * The default validation procedure without any extension. * * @param jp2 the jpeg2000 codec to validate. * @param cio the input stream to validate. * @param p_manager the user event manager. * * @return true if the parameters are correct. */ bool jp2_default_validation ( opj_jp2_t * jp2, 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 ); /** * Sets up the procedures to do on writting header after the codestream. * Developpers wanting to extend the library can add their own writting procedures. */ static void jp2_setup_end_header_writting (opj_jp2_t *jp2); /** * 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_t *jp2); /** * 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_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_t *jp2); /*@}*/ /*@}*/ /* ----------------------------------------------------------------------- */ const opj_jp2_header_handler_t jp2_header [] = { {JP2_JP,jp2_read_jp}, {JP2_FTYP,jp2_read_ftyp}, {JP2_JP2H,jp2_read_jp2h} }; const opj_jp2_header_handler_t jp2_img_header [] = { {JP2_IHDR,jp2_read_ihdr}, {JP2_COLR,jp2_read_colr}, {JP2_BPCC,jp2_read_bpcc} }; /** * 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 ) { unsigned int i, l_handler_size = sizeof(jp2_header) / sizeof(opj_jp2_header_handler_t); for (i=0;ijp2_state & JP2_STATE_HEADER) { jp2->jp2_state |= JP2_STATE_CODESTREAM; opj_free(l_current_data); return true; } else { opj_event_msg(p_manager, EVT_ERROR, "bad placed jpeg codestream\n"); opj_free(l_current_data); return false; } } else if (box.length == 0) { opj_event_msg(p_manager, EVT_ERROR, "Cannot handle box of undefined sizes\n"); opj_free(l_current_data); return 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(p_manager, EVT_ERROR, "Problem with reading JPEG2000 box, stream error\n"); return false; } if (! l_current_handler->handler(jp2,l_current_data,l_current_data_size,p_manager)) { opj_free(l_current_data); return 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(p_manager, EVT_ERROR, "Problem with skipping JPEG2000 box, stream error\n"); opj_free(l_current_data); return false; } } } opj_free(l_current_data); return 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 */ bool jp2_read_boxhdr(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 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 false; } opj_read_bytes(l_data_header,&l_xl_part_size, 4); if (l_xl_part_size != 0) { opj_event_msg(p_manager, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n"); return false; } opj_read_bytes(l_data_header,&(box->length), 4); } return 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 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 ) { // 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(p_manager, EVT_ERROR, "Cannot handle box of less than 8 bytes\n"); return false; } /* process read data */ opj_read_bytes(p_data,&(box->length), 4); p_data += 4; opj_read_bytes(p_data,&(box->type), 4); p_data += 4; *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(p_manager, EVT_ERROR, "Cannot handle XL box of less than 16 bytes\n"); return 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(p_manager, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n"); return false; } opj_read_bytes(p_data,&(box->length), 4); *p_number_bytes_read += 4; if (box->length == 0) { opj_event_msg(p_manager, EVT_ERROR, "Cannot handle box of undefined sizes\n"); return false; } } else if (box->length == 0) { opj_event_msg(p_manager, EVT_ERROR, "Cannot handle box of undefined sizes\n"); return false; } return true; } /** * 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. */ bool jp2_read_jp( opj_jp2_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(p_manager, EVT_ERROR, "The signature box must be the first box in the file.\n"); return false; } /* assure length of data is correct (4 -> magic number) */ if (p_header_size != 4) { opj_event_msg(p_manager, EVT_ERROR, "Error with JP signature Box size\n"); return false; } // rearrange data opj_read_bytes(p_header_data,&l_magic_number,4); if (l_magic_number != 0x0d0a870a ) { opj_event_msg(p_manager, EVT_ERROR, "Error with JP Signature : bad magic number\n"); return false; } jp2->jp2_state |= JP2_STATE_SIGNATURE; return 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. */ bool jp2_read_ftyp( opj_jp2_t *jp2, unsigned char * p_header_data, unsigned int p_header_size, opj_event_mgr_t * p_manager ) { unsigned int i; unsigned int 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(p_manager, EVT_ERROR, "The ftyp box must be the second box in the file.\n"); return false; } /* assure length of data is correct */ if (p_header_size < 8) { opj_event_msg(p_manager, EVT_ERROR, "Error with FTYP signature Box size\n"); return 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(p_manager, EVT_ERROR, "Error with FTYP signature Box size\n"); return 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(p_manager, EVT_ERROR, "Not enough memory with FTYP Box\n"); return 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 true; } /** * Writes a jpeg2000 file signature box. * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager the user event manager. * * @return true if writting was successful. */ bool jp2_write_jp ( opj_jp2_t *jp2, opj_stream_private_t *cio, opj_event_mgr_t * p_manager ) { /* 12 bytes will be read */ unsigned char l_signature_data [12]; // preconditions assert(cio != 00); assert(jp2 != 00); assert(p_manager != 00); /* write box length */ opj_write_bytes(l_signature_data,12,4); /* writes box type */ opj_write_bytes(l_signature_data+4,JP2_JP,4); /* writes magic number*/ opj_write_bytes(l_signature_data+8,0x0d0a870a,4); if (opj_stream_write_data(cio,l_signature_data,12,p_manager) != 12) { return false; } return true; } /** * Writes a FTYP box - File type box * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager the user event manager. * * @return true if writting was successful. */ bool jp2_write_ftyp( opj_jp2_t *jp2, opj_stream_private_t *cio, opj_event_mgr_t * p_manager ) { unsigned int i; unsigned int l_ftyp_size = 16 + 4 * jp2->numcl; unsigned char * l_ftyp_data, * l_current_data_ptr; bool l_result; // preconditions assert(cio != 00); assert(jp2 != 00); assert(p_manager != 00); l_ftyp_data = (unsigned char *) opj_malloc(l_ftyp_size); if (l_ftyp_data == 00) { opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to handle ftyp data\n"); return false; } memset(l_ftyp_data,0,l_ftyp_size); l_current_data_ptr = l_ftyp_data; opj_write_bytes(l_current_data_ptr, l_ftyp_size,4); /* box size */ l_current_data_ptr += 4; opj_write_bytes(l_current_data_ptr, JP2_FTYP,4); /* FTYP */ l_current_data_ptr += 4; opj_write_bytes(l_current_data_ptr, jp2->brand,4); /* BR */ l_current_data_ptr += 4; opj_write_bytes(l_current_data_ptr, jp2->minversion,4); /* MinV */ l_current_data_ptr += 4; for (i = 0; i < jp2->numcl; i++) { opj_write_bytes(l_current_data_ptr, jp2->cl[i],4); /* CL */ } l_result = (opj_stream_write_data(cio,l_ftyp_data,l_ftyp_size,p_manager) == l_ftyp_size); if (! l_result) { opj_event_msg(p_manager, EVT_ERROR, "Error while writting ftyp data to stream\n"); } opj_free(l_ftyp_data); return l_result; } /** * Writes the Jpeg2000 file Header box - JP2 Header box (warning, this is a super box). * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager user event manager. * * @return true if writting was successful. */ bool jp2_write_jp2h( opj_jp2_t *jp2, opj_stream_private_t *cio, opj_event_mgr_t * p_manager ) { opj_jp2_img_header_writer_handler_t l_writers [3]; opj_jp2_img_header_writer_handler_t * l_current_writer; int i, l_nb_pass; /* size of data for super box*/ int l_jp2h_size = 8; bool l_result = true; /* to store the data of the super box */ unsigned char l_jp2h_data [8]; // preconditions assert(cio != 00); assert(jp2 != 00); assert(p_manager != 00); memset(l_writers,0,sizeof(l_writers)); if (jp2->bpc == 255) { l_nb_pass = 3; l_writers[0].handler = jp2_write_ihdr; l_writers[1].handler = jp2_write_bpcc; l_writers[2].handler = jp2_write_colr; } else { l_nb_pass = 2; l_writers[0].handler = jp2_write_ihdr; l_writers[1].handler = jp2_write_colr; } /* write box header */ /* write JP2H type */ opj_write_bytes(l_jp2h_data+4,JP2_JP2H,4); l_current_writer = l_writers; for (i=0;im_data = l_current_writer->handler(jp2,&(l_current_writer->m_size)); if (l_current_writer->m_data == 00) { opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to hold JP2 Header data\n"); l_result = false; break; } l_jp2h_size += l_current_writer->m_size; ++l_current_writer; } if (! l_result) { l_current_writer = l_writers; for (i=0;im_data != 00) { opj_free(l_current_writer->m_data ); } ++l_current_writer; } return false; } /* write super box size */ opj_write_bytes(l_jp2h_data,l_jp2h_size,4); /* write super box data on stream */ if (opj_stream_write_data(cio,l_jp2h_data,8,p_manager) != 8) { opj_event_msg(p_manager, EVT_ERROR, "Stream error while writting JP2 Header box\n"); l_result = false; } if (l_result) { l_current_writer = l_writers; for (i=0;im_data,l_current_writer->m_size,p_manager) != l_current_writer->m_size) { opj_event_msg(p_manager, EVT_ERROR, "Stream error while writting JP2 Header box\n"); l_result = false; break; } ++l_current_writer; } } l_current_writer = l_writers; /* cleanup */ for (i=0;im_data != 00) { opj_free(l_current_writer->m_data ); } ++l_current_writer; } return l_result; } /** * 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. */ bool jp2_read_jp2h( opj_jp2_t *jp2, unsigned char * p_header_data, unsigned int p_header_size, opj_event_mgr_t * p_manager ) { unsigned int 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(p_manager, EVT_ERROR, "The box must be the first box in the file.\n"); return 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(p_manager, EVT_ERROR, "Stream error while reading JP2 Header box\n"); return false; } if (box.length > p_header_size) { opj_event_msg(p_manager, EVT_ERROR, "Stream error while reading JP2 Header box\n"); return 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 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 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. */ bool jp2_read_ihdr( opj_jp2_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(p_manager, EVT_ERROR, "Bad image header box (bad size)\n"); return 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(p_manager, EVT_ERROR, "Not enough memory to handle image header (ihdr)\n"); return 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; opj_read_bytes(p_image_header_data,&(jp2->C),1); /* C */ ++ p_image_header_data; 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 true; } /** * Writes the Image Header box - Image Header box. * * @param jp2 jpeg2000 file codec. * @param p_nb_bytes_written pointer to store the nb of bytes written by the function. * * @return the data being copied. */ static unsigned char * jp2_write_ihdr( opj_jp2_t *jp2, unsigned int * p_nb_bytes_written ) { unsigned char * l_ihdr_data,* l_current_ihdr_ptr; // preconditions assert(jp2 != 00); assert(p_nb_bytes_written != 00); /* default image header is 22 bytes wide */ l_ihdr_data = (unsigned char *) opj_malloc(22); if (l_ihdr_data == 00) { return 00; } memset(l_ihdr_data,0,22); l_current_ihdr_ptr = l_ihdr_data; opj_write_bytes(l_current_ihdr_ptr,22,4); /* write box size */ l_current_ihdr_ptr+=4; opj_write_bytes(l_current_ihdr_ptr,JP2_IHDR, 4); /* IHDR */ l_current_ihdr_ptr+=4; opj_write_bytes(l_current_ihdr_ptr,jp2->h, 4); /* HEIGHT */ l_current_ihdr_ptr+=4; opj_write_bytes(l_current_ihdr_ptr, jp2->w, 4); /* WIDTH */ l_current_ihdr_ptr+=4; opj_write_bytes(l_current_ihdr_ptr, jp2->numcomps, 2); /* NC */ l_current_ihdr_ptr+=2; opj_write_bytes(l_current_ihdr_ptr, jp2->bpc, 1); /* BPC */ ++l_current_ihdr_ptr; opj_write_bytes(l_current_ihdr_ptr, jp2->C, 1); /* C : Always 7 */ ++l_current_ihdr_ptr; opj_write_bytes(l_current_ihdr_ptr, jp2->UnkC, 1); /* UnkC, colorspace unknown */ ++l_current_ihdr_ptr; opj_write_bytes(l_current_ihdr_ptr, jp2->IPR, 1); /* IPR, no intellectual property */ ++l_current_ihdr_ptr; *p_nb_bytes_written = 22; return l_ihdr_data; } /** * Writes the Bit per Component box. * * @param jp2 jpeg2000 file codec. * @param p_nb_bytes_written pointer to store the nb of bytes written by the function. * * @return the data being copied. */ unsigned char * jp2_write_bpcc( opj_jp2_t *jp2, unsigned int * p_nb_bytes_written ) { unsigned int i; /* room for 8 bytes for box and 1 byte for each component */ int l_bpcc_size = 8 + jp2->numcomps; unsigned char * l_bpcc_data,* l_current_bpcc_ptr; // preconditions assert(jp2 != 00); assert(p_nb_bytes_written != 00); l_bpcc_data = (unsigned char *) opj_malloc(l_bpcc_size); if (l_bpcc_data == 00) { return 00; } memset(l_bpcc_data,0,l_bpcc_size); l_current_bpcc_ptr = l_bpcc_data; opj_write_bytes(l_current_bpcc_ptr,l_bpcc_size,4); /* write box size */ l_current_bpcc_ptr += 4; opj_write_bytes(l_current_bpcc_ptr,JP2_BPCC,4); /* BPCC */ l_current_bpcc_ptr += 4; for (i = 0; i < jp2->numcomps; ++i) { opj_write_bytes(l_current_bpcc_ptr, jp2->comps[i].bpcc, 1); /* write each component information */ ++l_current_bpcc_ptr; } *p_nb_bytes_written = l_bpcc_size; return l_bpcc_data; } /** * 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. */ bool jp2_read_bpcc( opj_jp2_t *jp2, unsigned char * p_bpc_header_data, unsigned int p_bpc_header_size, opj_event_mgr_t * p_manager ) { unsigned int i; // preconditions assert(p_bpc_header_data != 00); assert(jp2 != 00); assert(p_manager != 00); // and length is relevant if (p_bpc_header_size != jp2->numcomps) { opj_event_msg(p_manager, EVT_ERROR, "Bad BPCC header box (bad size)\n"); return 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 true; } /** * Writes the Colour Specification box. * * @param jp2 jpeg2000 file codec. * @param p_nb_bytes_written pointer to store the nb of bytes written by the function. * * @return the data being copied. */ unsigned char *jp2_write_colr( opj_jp2_t *jp2, unsigned int * p_nb_bytes_written ) { /* room for 8 bytes for box 3 for common data and variable upon profile*/ unsigned int l_colr_size = 11; unsigned char * l_colr_data,* l_current_colr_ptr; // preconditions assert(jp2 != 00); assert(p_nb_bytes_written != 00); switch (jp2->meth) { case 1 : l_colr_size += 4; break; case 2 : ++l_colr_size; break; default : return 00; } l_colr_data = (unsigned char *) opj_malloc(l_colr_size); if (l_colr_data == 00) { return 00; } memset(l_colr_data,0,l_colr_size); l_current_colr_ptr = l_colr_data; opj_write_bytes(l_current_colr_ptr,l_colr_size,4); /* write box size */ l_current_colr_ptr += 4; opj_write_bytes(l_current_colr_ptr,JP2_COLR,4); /* BPCC */ l_current_colr_ptr += 4; opj_write_bytes(l_current_colr_ptr, jp2->meth,1); /* METH */ ++l_current_colr_ptr; opj_write_bytes(l_current_colr_ptr, jp2->precedence,1); /* PRECEDENCE */ ++l_current_colr_ptr; opj_write_bytes(l_current_colr_ptr, jp2->approx,1); /* APPROX */ ++l_current_colr_ptr; if (jp2->meth == 1) { opj_write_bytes(l_current_colr_ptr, jp2->enumcs,4); /* EnumCS */ } else { opj_write_bytes(l_current_colr_ptr, 0, 1); /* PROFILE (??) */ } *p_nb_bytes_written = l_colr_size; return l_colr_data; } /** * 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. */ bool jp2_read_colr( opj_jp2_t * jp2, unsigned char * p_colr_header_data, unsigned int p_colr_header_size, opj_event_mgr_t * p_manager ) { // preconditions assert(jp2 != 00); assert(p_colr_header_data != 00); assert(p_manager != 00); if (p_colr_header_size < 3) { opj_event_msg(p_manager, EVT_ERROR, "Bad BPCC header box (bad size)\n"); return false; } 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(p_manager, EVT_ERROR, "Bad BPCC header box (bad size)\n"); return false; } opj_read_bytes(p_colr_header_data,&jp2->enumcs ,4); /* EnumCS */ } /*else { // do not care with profiles. }*/ return true; } /** * Writes the Jpeg2000 codestream Header box - JP2C Header box. * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager user event manager. * * @return true if writting was successful. */ bool jp2_write_jp2c( opj_jp2_t *jp2, opj_stream_private_t *cio, opj_event_mgr_t * p_manager ) { unsigned int j2k_codestream_exit; unsigned char l_data_header [8]; // preconditions assert(jp2 != 00); assert(cio != 00); assert(p_manager != 00); assert(opj_stream_has_seek(cio)); j2k_codestream_exit = opj_stream_tell(cio); opj_write_bytes(l_data_header,j2k_codestream_exit - jp2->j2k_codestream_offset,4); /* size of codestream */ opj_write_bytes(l_data_header + 4,JP2_JP2C,4); /* JP2C */ if (! opj_stream_seek(cio,jp2->j2k_codestream_offset,p_manager)) { opj_event_msg(p_manager, EVT_ERROR, "Failed to seek in the stream.\n"); return false; } if (opj_stream_write_data(cio,l_data_header,8,p_manager) != 8) { opj_event_msg(p_manager, EVT_ERROR, "Failed to seek in the stream.\n"); return false; } if (! opj_stream_seek(cio,j2k_codestream_exit,p_manager)) { opj_event_msg(p_manager, EVT_ERROR, "Failed to seek in the stream.\n"); return false; } return true; } /** * Destroys a jpeg2000 file decompressor. * * @param jp2 a jpeg2000 file decompressor. */ void jp2_destroy(opj_jp2_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->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); } } /* ----------------------------------------------------------------------- */ /* JP2 encoder interface */ /* ----------------------------------------------------------------------- */ opj_jp2_t* jp2_create(bool p_is_decoder) { opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t)); if (jp2) { memset(jp2,0,sizeof(opj_jp2_t)); /* create the J2K codec */ if (! p_is_decoder) { jp2->j2k = j2k_create_compress(); } else { jp2->j2k = j2k_create_decompress(); } 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; } /** * 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. */ bool jp2_exec ( opj_jp2_t * jp2, opj_procedure_list_t * p_procedure_list, opj_stream_private_t *cio, opj_event_mgr_t * p_manager ) { bool (** l_procedure) (opj_jp2_t * jp2,opj_stream_private_t *,opj_event_mgr_t *) = 00; bool l_result = true; unsigned int 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 = (bool (**) (opj_jp2_t * jp2,opj_stream_private_t *,opj_event_mgr_t *)) opj_procedure_list_get_first_procedure(p_procedure_list); for (i=0;im_validation_list,cio,p_manager)) { return false; } /* customization of the encoding */ jp2_setup_header_writting(jp2); /* write header */ if (! jp2_exec (jp2,jp2->m_procedure_list,cio,p_manager)) { return false; } return j2k_start_compress(jp2->j2k,cio,p_image,p_manager); } /** * 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. */ bool jp2_read_header( opj_jp2_t *jp2, opj_image_t ** p_image, OPJ_INT32 * p_tile_x0, OPJ_INT32 * p_tile_y0, OPJ_UINT32 * p_tile_width, OPJ_UINT32 * p_tile_height, OPJ_UINT32 * p_nb_tiles_x, OPJ_UINT32 * p_nb_tiles_y, struct opj_stream_private *cio, struct opj_event_mgr * p_manager ) { // preconditions assert(jp2 != 00); assert(cio != 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,cio,p_manager)) { return false; } /* read header */ if (! jp2_exec (jp2,jp2->m_procedure_list,cio,p_manager)) { return false; } return j2k_read_header( jp2->j2k, p_image, p_tile_x0, p_tile_y0, p_tile_width, p_tile_height, p_nb_tiles_x, p_nb_tiles_y, cio, p_manager); } /** * Ends the decompression procedures and possibiliy add data to be read after the * codestream. */ bool jp2_end_decompress(opj_jp2_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 false; } return j2k_end_decompress(jp2->j2k, cio, p_manager); } /** * Ends the compression procedures and possibiliy add data to be read after the * codestream. */ bool jp2_end_compress(opj_jp2_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_writting(jp2); if (! j2k_end_compress(jp2->j2k,cio,p_manager)) { return false; } /* write header */ return jp2_exec (jp2,jp2->m_procedure_list,cio,p_manager); } /** Encode an image into a JPEG-2000 file stream @param jp2 JP2 compressor handle @param cio Output buffer stream @param image Image to encode @param cstr_info Codestream information structure if required, NULL otherwise @return Returns true if successful, returns false otherwise */ bool opj_jp2_encode(opj_jp2_t *jp2, struct opj_stream_private *cio, struct opj_event_mgr * p_manager) { return j2k_encode(jp2->j2k,cio,p_manager); } /** * Writes a tile. * @param p_j2k the jpeg2000 codec. * @param p_stream the stream to write data to. * @param p_manager the user event manager. */ bool jp2_write_tile ( opj_jp2_t *p_jp2, OPJ_UINT32 p_tile_index, OPJ_BYTE * p_data, OPJ_UINT32 p_data_size, struct opj_stream_private *p_stream, struct opj_event_mgr * p_manager ) { return j2k_write_tile (p_jp2->j2k,p_tile_index,p_data,p_data_size,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. */ bool opj_jp2_decode_tile ( opj_jp2_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); } /** * 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. */ bool jp2_read_tile_header ( opj_jp2_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, 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); } /** * Sets up the procedures to do on writting header after the codestream. * Developpers wanting to extend the library can add their own writting procedures. */ void jp2_setup_end_header_writting (opj_jp2_t *jp2) { // preconditions assert(jp2 != 00); opj_procedure_list_add_procedure(jp2->m_procedure_list,(void*)jp2_write_jp2c ); /* DEVELOPER CORNER, add your custom procedures */ } /** * 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_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 */ } /** * 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_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 */ } /** * The default validation procedure without any extension. * * @param jp2 the jpeg2000 codec to validate. * @param cio the input stream to validate. * @param p_manager the user event manager. * * @return true if the parameters are correct. */ bool jp2_default_validation ( opj_jp2_t * jp2, opj_stream_private_t *cio, opj_event_mgr_t * p_manager ) { bool l_is_valid = true; unsigned int i; // preconditions assert(jp2 != 00); assert(cio != 00); assert(p_manager != 00); /* JPEG2000 codec validation */ /*TODO*/ /* STATE checking */ /* make sure the state is at 0 */ l_is_valid &= (jp2->jp2_state == JP2_STATE_NONE); /* make sure not reading a jp2h ???? WEIRD */ l_is_valid &= (jp2->jp2_img_state == JP2_IMG_STATE_NONE); /* POINTER validation */ /* make sure a j2k codec is present */ l_is_valid &= (jp2->j2k != 00); /* make sure a procedure list is present */ l_is_valid &= (jp2->m_procedure_list != 00); /* make sure a validation list is present */ l_is_valid &= (jp2->m_validation_list != 00); /* PARAMETER VALIDATION */ /* number of components */ l_is_valid &= (jp2->numcl > 0); /* width */ l_is_valid &= (jp2->h > 0); /* height */ l_is_valid &= (jp2->w > 0); /* precision */ for (i = 0; i < jp2->numcomps; ++i) { l_is_valid &= (jp2->comps[i].bpcc > 0); } /* METH */ l_is_valid &= ((jp2->meth > 0) && (jp2->meth < 3)); /* stream validation */ /* back and forth is needed */ l_is_valid &= opj_stream_has_seek(cio); return l_is_valid; } /** * 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_encoding_validation (opj_jp2_t *jp2) { // preconditions assert(jp2 != 00); opj_procedure_list_add_procedure(jp2->m_validation_list, (void*)jp2_default_validation); /* DEVELOPER CORNER, add your custom validation procedure */ } /** * 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_t *jp2) { // preconditions assert(jp2 != 00); /* DEVELOPER CORNER, add your custom validation procedure */ } /** * Sets up the procedures to do on writting header. Developpers wanting to extend the library can add their own writting procedures. */ void jp2_setup_header_writting (opj_jp2_t *jp2) { // preconditions assert(jp2 != 00); opj_procedure_list_add_procedure(jp2->m_procedure_list,(void*)jp2_write_jp ); opj_procedure_list_add_procedure(jp2->m_procedure_list,(void*)jp2_write_ftyp ); opj_procedure_list_add_procedure(jp2->m_procedure_list,(void*)jp2_write_jp2h ); opj_procedure_list_add_procedure(jp2->m_procedure_list,(void*)jp2_skip_jp2c ); /* DEVELOPER CORNER, insert your custom procedures */ } /** * Skips the Jpeg2000 Codestream Header box - JP2C Header box. * * @param cio the stream to write data to. * @param jp2 the jpeg2000 file codec. * @param p_manager user event manager. * * @return true if writting was successful. */ bool jp2_skip_jp2c( opj_jp2_t *jp2, struct opj_stream_private *cio, struct opj_event_mgr * p_manager ) { // preconditions assert(jp2 != 00); assert(cio != 00); assert(p_manager != 00); jp2->j2k_codestream_offset = opj_stream_tell(cio); if (opj_stream_skip(cio,8,p_manager) != 8) { return false; } return true; } struct opj_image * opj_jp2_decode(opj_jp2_t *jp2, struct opj_stream_private *cio, struct opj_event_mgr * p_manager) { /* J2K decoding */ struct opj_image * image = j2k_decode(jp2->j2k, cio, p_manager); if (!image) { opj_event_msg(p_manager, EVT_ERROR, "Failed to decode J2K image\n"); return false; } /* 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; return image; } void jp2_setup_encoder(opj_jp2_t *jp2, opj_cparameters_t *parameters, opj_image_t *image,opj_event_mgr_t * p_manager) { unsigned 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(p_manager, EVT_ERROR, "Invalid number of components specified while setting up JP2 encoder\n"); return; } j2k_setup_encoder(jp2->j2k, parameters, image,p_manager); /* 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); } /* 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𣇻 */ 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 */ } void jp2_setup_decoder(opj_jp2_t *jp2, opj_dparameters_t *parameters) { if(!jp2 || !parameters) return; /* setup the J2K codec */ /* ------------------- */ j2k_setup_decoder(jp2->j2k, parameters); } /** * 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. */ bool jp2_set_decode_area( opj_jp2_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); } #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