/* * 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;ijp2_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_file_info_t * p_file_info, 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_file_info, 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; }